/* Functions for image support on window system. Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of GNU Emacs. GNU Emacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #include #include #include #ifdef HAVE_UNISTD_H #include #endif /* This makes the fields of a Display accessible, in Xlib header files. */ #define XLIB_ILLEGAL_ACCESS #include "lisp.h" #include "frame.h" #include "window.h" #include "dispextern.h" #include "blockinput.h" #include "systime.h" #include #include "charset.h" #include "coding.h" #ifdef HAVE_X_WINDOWS #include "xterm.h" #include #include #define COLOR_TABLE_SUPPORT 1 typedef struct x_bitmap_record Bitmap_Record; #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y) #define NO_PIXMAP None #define RGB_PIXEL_COLOR unsigned long #define PIX_MASK_RETAIN 0 #define PIX_MASK_DRAW 1 #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI #ifdef MEADOW #include "mw32term.h" #define check_x_frame check_mw32_frame typedef struct mw32_bitmap_record Bitmap_Record; #define GET_PIXEL(ximg, x, y) GetPixel(ximg, x, y) #define RGB_PIXEL_COLOR COLORREF #define PIX_MASK_RETAIN 0 #define PIX_MASK_DRAW 1 #else /* not MEADOW */ #include "w32term.h" /* W32_TODO : Color tables on W32. */ #undef COLOR_TABLE_SUPPORT typedef struct w32_bitmap_record Bitmap_Record; #define GET_PIXEL(ximg, x, y) GetPixel(ximg, x, y) #define NO_PIXMAP 0 #define RGB_PIXEL_COLOR COLORREF #define PIX_MASK_RETAIN 0 #define PIX_MASK_DRAW 1 #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual #define x_defined_color w32_defined_color #define DefaultDepthOfScreen(screen) (one_w32_display_info.n_cbits) #endif /* not MEADOW */ #endif /* HAVE_NTGUI */ #ifdef MAC_OS #include "macterm.h" #include #ifndef MAC_OSX #include #include #endif #if TARGET_API_MAC_CARBON #ifdef MAC_OSX #include #else /* not MAC_OSX */ #include #endif /* not MAC_OSX */ #else /* not TARGET_API_MAC_CARBON */ #include #include #include #include #include #endif /* not TARGET_API_MAC_CARBON */ /* MAC_TODO : Color tables on Mac. */ #undef COLOR_TABLE_SUPPORT #define ZPixmap 0 /* arbitrary */ typedef struct mac_bitmap_record Bitmap_Record; #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y) #define NO_PIXMAP 0 #define RGB_PIXEL_COLOR unsigned long /* A black pixel in a mask bitmap/pixmap means ``draw a source pixel''. A white pixel means ``retain the current pixel''. */ #define PIX_MASK_DRAW RGB_TO_ULONG(0,0,0) #define PIX_MASK_RETAIN RGB_TO_ULONG(255,255,255) #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual #define x_defined_color mac_defined_color #define DefaultDepthOfScreen(screen) (one_mac_display_info.n_planes) #endif /* MAC_OS */ /* Search path for bitmap files. */ Lisp_Object Vx_bitmap_file_path; static void x_disable_image P_ ((struct frame *, struct image *)); static void x_edge_detection P_ ((struct frame *, struct image *, Lisp_Object, Lisp_Object)); static void init_color_table P_ ((void)); static unsigned long lookup_rgb_color P_ ((struct frame *f, int r, int g, int b)); #ifdef COLOR_TABLE_SUPPORT static void free_color_table P_ ((void)); static unsigned long *colors_in_color_table P_ ((int *n)); static unsigned long lookup_pixel_color P_ ((struct frame *f, unsigned long p)); #endif /* Code to deal with bitmaps. Bitmaps are referenced by their bitmap id, which is just an int that this section returns. Bitmaps are reference counted so they can be shared among frames. Bitmap indices are guaranteed to be > 0, so a negative number can be used to indicate no bitmap. If you use x_create_bitmap_from_data, then you must keep track of the bitmaps yourself. That is, creating a bitmap from the same data more than once will not be caught. */ #ifdef MAC_OS static XImagePtr XGetImage (display, pixmap, x, y, width, height, plane_mask, format) Display *display; /* not used */ Pixmap pixmap; int x, y; /* not used */ unsigned int width, height; /* not used */ unsigned long plane_mask; /* not used */ int format; /* not used */ { #if GLYPH_DEBUG xassert (x == 0 && y == 0); { Rect ri, rp; SetRect (&ri, 0, 0, width, height); xassert (EqualRect (&ri, GetPixBounds (GetGWorldPixMap (pixmap), &rp))); } xassert (! (pixelsLocked & GetPixelsState (GetGWorldPixMap (pixmap)))); #endif LockPixels (GetGWorldPixMap (pixmap)); return pixmap; } static void XPutPixel (ximage, x, y, pixel) XImagePtr ximage; int x, y; unsigned long pixel; { PixMapHandle pixmap = GetGWorldPixMap (ximage); short depth = GetPixDepth (pixmap); #if defined (WORDS_BIG_ENDIAN) || !USE_CG_DRAWING if (depth == 32) { char *base_addr = GetPixBaseAddr (pixmap); short row_bytes = GetPixRowBytes (pixmap); ((unsigned long *) (base_addr + y * row_bytes))[x] = 0xff000000 | pixel; } else #endif if (depth == 1) { char *base_addr = GetPixBaseAddr (pixmap); short row_bytes = GetPixRowBytes (pixmap); if (pixel == PIX_MASK_DRAW) base_addr[y * row_bytes + x / 8] |= (1 << 7) >> (x & 7); else base_addr[y * row_bytes + x / 8] &= ~((1 << 7) >> (x & 7)); } else { CGrafPtr old_port; GDHandle old_gdh; RGBColor color; GetGWorld (&old_port, &old_gdh); SetGWorld (ximage, NULL); color.red = RED16_FROM_ULONG (pixel); color.green = GREEN16_FROM_ULONG (pixel); color.blue = BLUE16_FROM_ULONG (pixel); SetCPixel (x, y, &color); SetGWorld (old_port, old_gdh); } } static unsigned long XGetPixel (ximage, x, y) XImagePtr ximage; int x, y; { PixMapHandle pixmap = GetGWorldPixMap (ximage); short depth = GetPixDepth (pixmap); #if defined (WORDS_BIG_ENDIAN) || !USE_CG_DRAWING if (depth == 32) { char *base_addr = GetPixBaseAddr (pixmap); short row_bytes = GetPixRowBytes (pixmap); return ((unsigned long *) (base_addr + y * row_bytes))[x] & 0x00ffffff; } else #endif if (depth == 1) { char *base_addr = GetPixBaseAddr (pixmap); short row_bytes = GetPixRowBytes (pixmap); if (base_addr[y * row_bytes + x / 8] & (1 << (~x & 7))) return PIX_MASK_DRAW; else return PIX_MASK_RETAIN; } else { CGrafPtr old_port; GDHandle old_gdh; RGBColor color; GetGWorld (&old_port, &old_gdh); SetGWorld (ximage, NULL); GetCPixel (x, y, &color); SetGWorld (old_port, old_gdh); return RGB_TO_ULONG (color.red >> 8, color.green >> 8, color.blue >> 8); } } static void XDestroyImage (ximg) XImagePtr ximg; { UnlockPixels (GetGWorldPixMap (ximg)); } #if USE_CG_DRAWING static CGImageRef mac_create_cg_image_from_image (f, img) struct frame *f; struct image *img; { Pixmap mask; CGImageRef result = NULL; BLOCK_INPUT; if (img->mask) mask = img->mask; else { mask = XCreatePixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), img->width, img->height, 1); if (mask) { CGrafPtr old_port; GDHandle old_gdh; Rect r; GetGWorld (&old_port, &old_gdh); SetGWorld (mask, NULL); BackColor (blackColor); /* Don't mask. */ SetRect (&r, 0, 0, img->width, img->height); EraseRect (&r); SetGWorld (old_port, old_gdh); } } if (mask) { CreateCGImageFromPixMaps (GetGWorldPixMap (img->pixmap), GetGWorldPixMap (mask), &result); if (mask != img->mask) XFreePixmap (FRAME_X_DISPLAY (f), mask); } UNBLOCK_INPUT; return result; } #endif /* USE_CG_DRAWING */ #endif /* MAC_OS */ /* Functions to access the contents of a bitmap, given an id. */ int x_bitmap_height (f, id) FRAME_PTR f; int id; { return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].height; } int x_bitmap_width (f, id) FRAME_PTR f; int id; { return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].width; } #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI) int x_bitmap_pixmap (f, id) FRAME_PTR f; int id; { return (int) FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap; } #endif #ifdef HAVE_X_WINDOWS int x_bitmap_mask (f, id) FRAME_PTR f; int id; { return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].mask; } #endif /* Allocate a new bitmap record. Returns index of new record. */ static int x_allocate_bitmap_record (f) FRAME_PTR f; { Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); int i; if (dpyinfo->bitmaps == NULL) { dpyinfo->bitmaps_size = 10; dpyinfo->bitmaps = (Bitmap_Record *) xmalloc (dpyinfo->bitmaps_size * sizeof (Bitmap_Record)); dpyinfo->bitmaps_last = 1; return 1; } if (dpyinfo->bitmaps_last < dpyinfo->bitmaps_size) return ++dpyinfo->bitmaps_last; for (i = 0; i < dpyinfo->bitmaps_size; ++i) if (dpyinfo->bitmaps[i].refcount == 0) return i + 1; dpyinfo->bitmaps_size *= 2; dpyinfo->bitmaps = (Bitmap_Record *) xrealloc (dpyinfo->bitmaps, dpyinfo->bitmaps_size * sizeof (Bitmap_Record)); return ++dpyinfo->bitmaps_last; } /* Add one reference to the reference count of the bitmap with id ID. */ void x_reference_bitmap (f, id) FRAME_PTR f; int id; { ++FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].refcount; } /* Create a bitmap for frame F from a HEIGHT x WIDTH array of bits at BITS. */ int x_create_bitmap_from_data (f, bits, width, height) struct frame *f; char *bits; unsigned int width, height; { Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); int id; #ifdef HAVE_X_WINDOWS Pixmap bitmap; bitmap = XCreateBitmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), bits, width, height); if (! bitmap) return -1; #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI Pixmap bitmap; #ifdef MEADOW bitmap = 0; #else /* not MEADOW */ bitmap = CreateBitmap (width, height, FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_planes, FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_cbits, bits); #endif /* not MEADOW */ if (! bitmap) return -1; #endif /* HAVE_NTGUI */ #ifdef MAC_OS /* MAC_TODO: for now fail if width is not mod 16 (toolbox requires it) */ if (width % 16 != 0) return -1; #endif id = x_allocate_bitmap_record (f); #ifdef MAC_OS dpyinfo->bitmaps[id - 1].bitmap_data = (char *) xmalloc (height * width); bcopy (bits, dpyinfo->bitmaps[id - 1].bitmap_data, height * width); #endif /* MAC_OS */ dpyinfo->bitmaps[id - 1].file = NULL; dpyinfo->bitmaps[id - 1].height = height; dpyinfo->bitmaps[id - 1].width = width; dpyinfo->bitmaps[id - 1].refcount = 1; #ifdef HAVE_X_WINDOWS dpyinfo->bitmaps[id - 1].pixmap = bitmap; dpyinfo->bitmaps[id - 1].have_mask = 0; dpyinfo->bitmaps[id - 1].depth = 1; #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI dpyinfo->bitmaps[id - 1].pixmap = bitmap; #ifndef MEADOW dpyinfo->bitmaps[id - 1].hinst = NULL; #endif /* MEADOW */ dpyinfo->bitmaps[id - 1].depth = 1; #endif /* HAVE_NTGUI */ return id; } /* Create bitmap from file FILE for frame F. */ int x_create_bitmap_from_file (f, file) struct frame *f; Lisp_Object file; { #ifdef MAC_OS return -1; /* MAC_TODO : bitmap support */ #endif /* MAC_OS */ #ifdef HAVE_NTGUI return -1; /* W32_TODO : bitmap support */ #endif /* HAVE_NTGUI */ #ifdef HAVE_X_WINDOWS Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); unsigned int width, height; Pixmap bitmap; int xhot, yhot, result, id; Lisp_Object found; int fd; char *filename; /* Look for an existing bitmap with the same name. */ for (id = 0; id < dpyinfo->bitmaps_last; ++id) { if (dpyinfo->bitmaps[id].refcount && dpyinfo->bitmaps[id].file && !strcmp (dpyinfo->bitmaps[id].file, (char *) SDATA (file))) { ++dpyinfo->bitmaps[id].refcount; return id + 1; } } /* Search bitmap-file-path for the file, if appropriate. */ fd = openp (Vx_bitmap_file_path, file, Qnil, &found, Qnil); if (fd < 0) return -1; emacs_close (fd); filename = (char *) SDATA (found); result = XReadBitmapFile (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), filename, &width, &height, &bitmap, &xhot, &yhot); if (result != BitmapSuccess) return -1; id = x_allocate_bitmap_record (f); dpyinfo->bitmaps[id - 1].pixmap = bitmap; dpyinfo->bitmaps[id - 1].have_mask = 0; dpyinfo->bitmaps[id - 1].refcount = 1; dpyinfo->bitmaps[id - 1].file = (char *) xmalloc (SBYTES (file) + 1); dpyinfo->bitmaps[id - 1].depth = 1; dpyinfo->bitmaps[id - 1].height = height; dpyinfo->bitmaps[id - 1].width = width; strcpy (dpyinfo->bitmaps[id - 1].file, SDATA (file)); return id; #endif /* HAVE_X_WINDOWS */ } /* Free bitmap B. */ static void Free_Bitmap_Record (dpyinfo, bm) Display_Info *dpyinfo; Bitmap_Record *bm; { #ifdef HAVE_X_WINDOWS XFreePixmap (dpyinfo->display, bm->pixmap); if (bm->have_mask) XFreePixmap (dpyinfo->display, bm->mask); #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI DeleteObject (bm->pixmap); #endif /* HAVE_NTGUI */ #ifdef MAC_OS xfree (bm->bitmap_data); /* Added ++kfs */ bm->bitmap_data = NULL; #endif /* MAC_OS */ if (bm->file) { xfree (bm->file); bm->file = NULL; } } /* Remove reference to bitmap with id number ID. */ void x_destroy_bitmap (f, id) FRAME_PTR f; int id; { Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); if (id > 0) { Bitmap_Record *bm = &dpyinfo->bitmaps[id - 1]; if (--bm->refcount == 0) { BLOCK_INPUT; Free_Bitmap_Record (dpyinfo, bm); UNBLOCK_INPUT; } } } /* Free all the bitmaps for the display specified by DPYINFO. */ void x_destroy_all_bitmaps (dpyinfo) Display_Info *dpyinfo; { int i; Bitmap_Record *bm = dpyinfo->bitmaps; for (i = 0; i < dpyinfo->bitmaps_last; i++, bm++) if (bm->refcount > 0) Free_Bitmap_Record (dpyinfo, bm); dpyinfo->bitmaps_last = 0; } #ifdef HAVE_X_WINDOWS /* Useful functions defined in the section `Image type independent image structures' below. */ static unsigned long four_corners_best P_ ((XImagePtr ximg, int *corners, unsigned long width, unsigned long height)); static int x_create_x_image_and_pixmap P_ ((struct frame *f, int width, int height, int depth, XImagePtr *ximg, Pixmap *pixmap)); static void x_destroy_x_image P_ ((XImagePtr ximg)); /* Create a mask of a bitmap. Note is this not a perfect mask. It's nicer with some borders in this context */ int x_create_bitmap_mask (f, id) struct frame *f; int id; { Pixmap pixmap, mask; XImagePtr ximg, mask_img; unsigned long width, height; int result; unsigned long bg; unsigned long x, y, xp, xm, yp, ym; GC gc; Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); if (!(id > 0)) return -1; pixmap = x_bitmap_pixmap (f, id); width = x_bitmap_width (f, id); height = x_bitmap_height (f, id); BLOCK_INPUT; ximg = XGetImage (FRAME_X_DISPLAY (f), pixmap, 0, 0, width, height, ~0, ZPixmap); if (!ximg) { UNBLOCK_INPUT; return -1; } result = x_create_x_image_and_pixmap (f, width, height, 1, &mask_img, &mask); UNBLOCK_INPUT; if (!result) { XDestroyImage (ximg); return -1; } bg = four_corners_best (ximg, NULL, width, height); for (y = 0; y < ximg->height; ++y) { for (x = 0; x < ximg->width; ++x) { xp = x != ximg->width - 1 ? x + 1 : 0; xm = x != 0 ? x - 1 : ximg->width - 1; yp = y != ximg->height - 1 ? y + 1 : 0; ym = y != 0 ? y - 1 : ximg->height - 1; if (XGetPixel (ximg, x, y) == bg && XGetPixel (ximg, x, yp) == bg && XGetPixel (ximg, x, ym) == bg && XGetPixel (ximg, xp, y) == bg && XGetPixel (ximg, xp, yp) == bg && XGetPixel (ximg, xp, ym) == bg && XGetPixel (ximg, xm, y) == bg && XGetPixel (ximg, xm, yp) == bg && XGetPixel (ximg, xm, ym) == bg) XPutPixel (mask_img, x, y, 0); else XPutPixel (mask_img, x, y, 1); } } xassert (interrupt_input_blocked); gc = XCreateGC (FRAME_X_DISPLAY (f), mask, 0, NULL); XPutImage (FRAME_X_DISPLAY (f), mask, gc, mask_img, 0, 0, 0, 0, width, height); XFreeGC (FRAME_X_DISPLAY (f), gc); dpyinfo->bitmaps[id - 1].have_mask = 1; dpyinfo->bitmaps[id - 1].mask = mask; XDestroyImage (ximg); x_destroy_x_image (mask_img); return 0; } #endif /* HAVE_X_WINDOWS */ /*********************************************************************** Image types ***********************************************************************/ /* Value is the number of elements of vector VECTOR. */ #define DIM(VECTOR) (sizeof (VECTOR) / sizeof *(VECTOR)) /* List of supported image types. Use define_image_type to add new types. Use lookup_image_type to find a type for a given symbol. */ static struct image_type *image_types; /* A list of symbols, one for each supported image type. */ Lisp_Object Vimage_types; /* An alist of image types and libraries that implement the type. */ Lisp_Object Vimage_library_alist; /* Cache for delayed-loading image types. */ static Lisp_Object Vimage_type_cache; /* The symbol `xbm' which is used as the type symbol for XBM images. */ Lisp_Object Qxbm; /* Keywords. */ extern Lisp_Object QCwidth, QCheight, QCforeground, QCbackground, QCfile; extern Lisp_Object QCdata, QCtype, Qcount; extern Lisp_Object Qcenter; Lisp_Object QCascent, QCmargin, QCrelief; Lisp_Object QCconversion, QCcolor_symbols, QCheuristic_mask; Lisp_Object QCindex, QCmatrix, QCcolor_adjustment, QCmask; /* Other symbols. */ Lisp_Object Qlaplace, Qemboss, Qedge_detection, Qheuristic; #ifdef MEADOW Lisp_Object Qpostscript; Lisp_Object Qpbm, Qxpm, Qjpeg, Qtiff, Qgif, Qpng, Qbmp; #endif /* Time in seconds after which images should be removed from the cache if not displayed. */ Lisp_Object Vimage_cache_eviction_delay; /* Function prototypes. */ static Lisp_Object define_image_type P_ ((struct image_type *type, int loaded)); static struct image_type *lookup_image_type P_ ((Lisp_Object symbol)); static void image_error P_ ((char *format, Lisp_Object, Lisp_Object)); static void x_laplace P_ ((struct frame *, struct image *)); static void x_emboss P_ ((struct frame *, struct image *)); static int x_build_heuristic_mask P_ ((struct frame *, struct image *, Lisp_Object)); #define CACHE_IMAGE_TYPE(type, status) \ do { Vimage_type_cache = Fcons (Fcons (type, status), Vimage_type_cache); } while (0) #define ADD_IMAGE_TYPE(type) \ do { Vimage_types = Fcons (type, Vimage_types); } while (0) /* Define a new image type from TYPE. This adds a copy of TYPE to image_types and caches the loading status of TYPE. */ static Lisp_Object define_image_type (type, loaded) struct image_type *type; int loaded; { Lisp_Object success; if (!loaded) success = Qnil; else { /* Make a copy of TYPE to avoid a bus error in a dumped Emacs. The initialized data segment is read-only. */ struct image_type *p = (struct image_type *) xmalloc (sizeof *p); bcopy (type, p, sizeof *p); p->next = image_types; image_types = p; success = Qt; } CACHE_IMAGE_TYPE (*type->type, success); return success; } /* Look up image type SYMBOL, and return a pointer to its image_type structure. Value is null if SYMBOL is not a known image type. */ static INLINE struct image_type * lookup_image_type (symbol) Lisp_Object symbol; { struct image_type *type; /* We must initialize the image-type if it hasn't been already. */ if (NILP (Finit_image_library (symbol, Vimage_library_alist))) return 0; /* unimplemented */ for (type = image_types; type; type = type->next) if (EQ (symbol, *type->type)) break; return type; } /* Value is non-zero if OBJECT is a valid Lisp image specification. A valid image specification is a list whose car is the symbol `image', and whose rest is a property list. The property list must contain a value for key `:type'. That value must be the name of a supported image type. The rest of the property list depends on the image type. */ int valid_image_p (object) Lisp_Object object; { int valid_p = 0; if (IMAGEP (object)) { Lisp_Object tem; for (tem = XCDR (object); CONSP (tem); tem = XCDR (tem)) if (EQ (XCAR (tem), QCtype)) { tem = XCDR (tem); if (CONSP (tem) && SYMBOLP (XCAR (tem))) { struct image_type *type; type = lookup_image_type (XCAR (tem)); if (type) valid_p = type->valid_p (object); } break; } } return valid_p; } /* Log error message with format string FORMAT and argument ARG. Signaling an error, e.g. when an image cannot be loaded, is not a good idea because this would interrupt redisplay, and the error message display would lead to another redisplay. This function therefore simply displays a message. */ static void image_error (format, arg1, arg2) char *format; Lisp_Object arg1, arg2; { add_to_log (format, arg1, arg2); } /*********************************************************************** Image specifications ***********************************************************************/ enum image_value_type { IMAGE_DONT_CHECK_VALUE_TYPE, IMAGE_STRING_VALUE, IMAGE_STRING_OR_NIL_VALUE, IMAGE_SYMBOL_VALUE, IMAGE_POSITIVE_INTEGER_VALUE, IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, IMAGE_NON_NEGATIVE_INTEGER_VALUE, IMAGE_ASCENT_VALUE, IMAGE_INTEGER_VALUE, IMAGE_FUNCTION_VALUE, IMAGE_NUMBER_VALUE, IMAGE_BOOL_VALUE }; /* Structure used when parsing image specifications. */ struct image_keyword { /* Name of keyword. */ char *name; /* The type of value allowed. */ enum image_value_type type; /* Non-zero means key must be present. */ int mandatory_p; /* Used to recognize duplicate keywords in a property list. */ int count; /* The value that was found. */ Lisp_Object value; }; static int parse_image_spec P_ ((Lisp_Object, struct image_keyword *, int, Lisp_Object)); static Lisp_Object image_spec_value P_ ((Lisp_Object, Lisp_Object, int *)); /* Parse image spec SPEC according to KEYWORDS. A valid image spec has the format (image KEYWORD VALUE ...). One of the keyword/ value pairs must be `:type TYPE'. KEYWORDS is a vector of image_keywords structures of size NKEYWORDS describing other allowed keyword/value pairs. Value is non-zero if SPEC is valid. */ static int parse_image_spec (spec, keywords, nkeywords, type) Lisp_Object spec; struct image_keyword *keywords; int nkeywords; Lisp_Object type; { int i; Lisp_Object plist; if (!IMAGEP (spec)) return 0; plist = XCDR (spec); while (CONSP (plist)) { Lisp_Object key, value; /* First element of a pair must be a symbol. */ key = XCAR (plist); plist = XCDR (plist); if (!SYMBOLP (key)) return 0; /* There must follow a value. */ if (!CONSP (plist)) return 0; value = XCAR (plist); plist = XCDR (plist); /* Find key in KEYWORDS. Error if not found. */ for (i = 0; i < nkeywords; ++i) if (strcmp (keywords[i].name, SDATA (SYMBOL_NAME (key))) == 0) break; if (i == nkeywords) continue; /* Record that we recognized the keyword. If a keywords was found more than once, it's an error. */ keywords[i].value = value; ++keywords[i].count; if (keywords[i].count > 1) return 0; /* Check type of value against allowed type. */ switch (keywords[i].type) { case IMAGE_STRING_VALUE: if (!STRINGP (value)) return 0; break; case IMAGE_STRING_OR_NIL_VALUE: if (!STRINGP (value) && !NILP (value)) return 0; break; case IMAGE_SYMBOL_VALUE: if (!SYMBOLP (value)) return 0; break; case IMAGE_POSITIVE_INTEGER_VALUE: if (!INTEGERP (value) || XINT (value) <= 0) return 0; break; case IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR: if (INTEGERP (value) && XINT (value) >= 0) break; if (CONSP (value) && INTEGERP (XCAR (value)) && INTEGERP (XCDR (value)) && XINT (XCAR (value)) >= 0 && XINT (XCDR (value)) >= 0) break; return 0; case IMAGE_ASCENT_VALUE: if (SYMBOLP (value) && EQ (value, Qcenter)) break; else if (INTEGERP (value) && XINT (value) >= 0 && XINT (value) <= 100) break; return 0; case IMAGE_NON_NEGATIVE_INTEGER_VALUE: if (!INTEGERP (value) || XINT (value) < 0) return 0; break; case IMAGE_DONT_CHECK_VALUE_TYPE: break; case IMAGE_FUNCTION_VALUE: value = indirect_function (value); if (SUBRP (value) || COMPILEDP (value) || (CONSP (value) && EQ (XCAR (value), Qlambda))) break; return 0; case IMAGE_NUMBER_VALUE: if (!INTEGERP (value) && !FLOATP (value)) return 0; break; case IMAGE_INTEGER_VALUE: if (!INTEGERP (value)) return 0; break; case IMAGE_BOOL_VALUE: if (!NILP (value) && !EQ (value, Qt)) return 0; break; default: abort (); break; } if (EQ (key, QCtype) && !EQ (type, value)) return 0; } /* Check that all mandatory fields are present. */ for (i = 0; i < nkeywords; ++i) if (keywords[i].mandatory_p && keywords[i].count == 0) return 0; return NILP (plist); } /* Return the value of KEY in image specification SPEC. Value is nil if KEY is not present in SPEC. if FOUND is not null, set *FOUND to 1 if KEY was found in SPEC, set it to 0 otherwise. */ static Lisp_Object image_spec_value (spec, key, found) Lisp_Object spec, key; int *found; { Lisp_Object tail; xassert (valid_image_p (spec)); for (tail = XCDR (spec); CONSP (tail) && CONSP (XCDR (tail)); tail = XCDR (XCDR (tail))) { if (EQ (XCAR (tail), key)) { if (found) *found = 1; return XCAR (XCDR (tail)); } } if (found) *found = 0; return Qnil; } DEFUN ("image-size", Fimage_size, Simage_size, 1, 3, 0, doc: /* Return the size of image SPEC as pair (WIDTH . HEIGHT). PIXELS non-nil means return the size in pixels, otherwise return the size in canonical character units. FRAME is the frame on which the image will be displayed. FRAME nil or omitted means use the selected frame. */) (spec, pixels, frame) Lisp_Object spec, pixels, frame; { Lisp_Object size; size = Qnil; if (valid_image_p (spec)) { struct frame *f = check_x_frame (frame); int id = lookup_image (f, spec); struct image *img = IMAGE_FROM_ID (f, id); int width = img->width + 2 * img->hmargin; int height = img->height + 2 * img->vmargin; if (NILP (pixels)) size = Fcons (make_float ((double) width / FRAME_COLUMN_WIDTH (f)), make_float ((double) height / FRAME_LINE_HEIGHT (f))); else size = Fcons (make_number (width), make_number (height)); } else error ("Invalid image specification"); return size; } DEFUN ("image-mask-p", Fimage_mask_p, Simage_mask_p, 1, 2, 0, doc: /* Return t if image SPEC has a mask bitmap. FRAME is the frame on which the image will be displayed. FRAME nil or omitted means use the selected frame. */) (spec, frame) Lisp_Object spec, frame; { Lisp_Object mask; mask = Qnil; if (valid_image_p (spec)) { struct frame *f = check_x_frame (frame); int id = lookup_image (f, spec); struct image *img = IMAGE_FROM_ID (f, id); #ifdef MEADOW if (MW32_IMAGE_HAS_MASK_P (img->mw32_img)) #else if (img->mask) #endif mask = Qt; } else error ("Invalid image specification"); return mask; } DEFUN ("image-extension-data", Fimage_extension_data, Simage_extension_data, 1, 2, 0, doc: /* Return extension data for image SPEC. FRAME is the frame on which the image will be displayed. FRAME nil or omitted means use the selected frame. */) (spec, frame) Lisp_Object spec, frame; { Lisp_Object ext; ext = Qnil; if (valid_image_p (spec)) { struct frame *f = check_x_frame (frame); int id = lookup_image (f, spec); struct image *img = IMAGE_FROM_ID (f, id); ext = img->data.lisp_val; } return ext; } /*********************************************************************** Image type independent image structures ***********************************************************************/ static struct image *make_image P_ ((Lisp_Object spec, unsigned hash)); static void free_image P_ ((struct frame *f, struct image *img)); static int check_image_size P_ ((struct frame *f, int width, int height)); #define MAX_IMAGE_SIZE 6.0 Lisp_Object Vmax_image_size; /* Allocate and return a new image structure for image specification SPEC. SPEC has a hash value of HASH. */ static struct image * make_image (spec, hash) Lisp_Object spec; unsigned hash; { struct image *img = (struct image *) xmalloc (sizeof *img); xassert (valid_image_p (spec)); bzero (img, sizeof *img); img->type = lookup_image_type (image_spec_value (spec, QCtype, NULL)); xassert (img->type != NULL); img->spec = spec; img->data.lisp_val = Qnil; img->ascent = DEFAULT_IMAGE_ASCENT; img->hash = hash; img->corners[BOT_CORNER] = -1; /* Full image */ return img; } /* Free image IMG which was used on frame F, including its resources. */ static void free_image (f, img) struct frame *f; struct image *img; { if (img) { struct image_cache *c = FRAME_X_IMAGE_CACHE (f); /* Remove IMG from the hash table of its cache. */ if (img->prev) img->prev->next = img->next; else c->buckets[img->hash % IMAGE_CACHE_BUCKETS_SIZE] = img->next; if (img->next) img->next->prev = img->prev; c->images[img->id] = NULL; /* Free resources, then free IMG. */ img->type->free (f, img); xfree (img); } } /* Return 1 if the given widths and heights are valid for display; otherwise, return 0. */ int check_image_size (f, width, height) struct frame *f; int width; int height; { int w, h; if (width <= 0 || height <= 0) return 0; if (INTEGERP (Vmax_image_size)) w = h = XINT (Vmax_image_size); else if (FLOATP (Vmax_image_size)) { if (f != NULL) { w = FRAME_PIXEL_WIDTH (f); h = FRAME_PIXEL_HEIGHT (f); } else w = h = 1024; /* Arbitrary size for unknown frame. */ w = (int) (XFLOAT_DATA (Vmax_image_size) * w); h = (int) (XFLOAT_DATA (Vmax_image_size) * h); } else return 1; return (width <= w && height <= h); } /* Prepare image IMG for display on frame F. Must be called before drawing an image. */ void prepare_image_for_display (f, img) struct frame *f; struct image *img; { EMACS_TIME t; /* We're about to display IMG, so set its timestamp to `now'. */ EMACS_GET_TIME (t); img->timestamp = EMACS_SECS (t); /* If IMG doesn't have a pixmap yet, load it now, using the image type dependent loader function. */ if ( #ifdef MEADOW !MW32_IMAGE_VALID_P (img->mw32_img) #else img->pixmap == NO_PIXMAP #endif && !img->load_failed_p) img->load_failed_p = img->type->load (f, img) == 0; #if defined (MAC_OS) && USE_CG_DRAWING if (!img->load_failed_p && img->data.ptr_val == NULL) { img->data.ptr_val = mac_create_cg_image_from_image (f, img); if (img->data.ptr_val == NULL) { img->load_failed_p = 1; img->type->free (f, img); } } #endif } /* Value is the number of pixels for the ascent of image IMG when drawn in face FACE. */ int image_ascent (img, face, slice) struct image *img; struct face *face; struct glyph_slice *slice; { int height; int ascent; if (slice->height == img->height) height = img->height + img->vmargin; else if (slice->y == 0) height = slice->height + img->vmargin; else height = slice->height; if (img->ascent == CENTERED_IMAGE_ASCENT) { if (face->font) { #ifdef HAVE_NTGUI /* W32 specific version. Why?. ++kfs */ ascent = height / 2 - (FONT_DESCENT(face->font) - FONT_BASE(face->font)) / 2; #else /* This expression is arranged so that if the image can't be exactly centered, it will be moved slightly up. This is because a typical font is `top-heavy' (due to the presence uppercase letters), so the image placement should err towards being top-heavy too. It also just generally looks better. */ ascent = (height + face->font->ascent - face->font->descent + 1) / 2; #endif /* HAVE_NTGUI */ } else ascent = height / 2; } else ascent = (int) (height * img->ascent / 100.0); return ascent; } /* Image background colors. */ /* Find the "best" corner color of a bitmap. On W32, XIMG is assumed to a device context with the bitmap selected. */ static RGB_PIXEL_COLOR four_corners_best (ximg, corners, width, height) XImagePtr_or_DC ximg; int *corners; unsigned long width, height; { RGB_PIXEL_COLOR corner_pixels[4], best; int i, best_count; if (corners && corners[BOT_CORNER] >= 0) { /* Get the colors at the corner_pixels of ximg. */ corner_pixels[0] = GET_PIXEL (ximg, corners[LEFT_CORNER], corners[TOP_CORNER]); corner_pixels[1] = GET_PIXEL (ximg, corners[RIGHT_CORNER] - 1, corners[TOP_CORNER]); corner_pixels[2] = GET_PIXEL (ximg, corners[RIGHT_CORNER] - 1, corners[BOT_CORNER] - 1); corner_pixels[3] = GET_PIXEL (ximg, corners[LEFT_CORNER], corners[BOT_CORNER] - 1); } else { /* Get the colors at the corner_pixels of ximg. */ corner_pixels[0] = GET_PIXEL (ximg, 0, 0); corner_pixels[1] = GET_PIXEL (ximg, width - 1, 0); corner_pixels[2] = GET_PIXEL (ximg, width - 1, height - 1); corner_pixels[3] = GET_PIXEL (ximg, 0, height - 1); } /* Choose the most frequently found color as background. */ for (i = best_count = 0; i < 4; ++i) { int j, n; for (j = n = 0; j < 4; ++j) if (corner_pixels[i] == corner_pixels[j]) ++n; if (n > best_count) best = corner_pixels[i], best_count = n; } return best; } /* Portability macros */ #ifdef HAVE_NTGUI #define Destroy_Image(img_dc, prev) \ do { SelectObject (img_dc, prev); DeleteDC (img_dc); } while (0) #define Free_Pixmap(display, pixmap) \ DeleteObject (pixmap) #else #define Destroy_Image(ximg, dummy) \ XDestroyImage (ximg) #define Free_Pixmap(display, pixmap) \ XFreePixmap (display, pixmap) #endif /* HAVE_NTGUI */ /* Return the `background' field of IMG. If IMG doesn't have one yet, it is guessed heuristically. If non-zero, XIMG is an existing XImage object (or device context with the image selected on W32) to use for the heuristic. */ RGB_PIXEL_COLOR image_background (img, f, ximg) struct image *img; struct frame *f; XImagePtr_or_DC ximg; { if (! img->background_valid) /* IMG doesn't have a background yet, try to guess a reasonable value. */ { int free_ximg = !ximg; #ifdef HAVE_NTGUI HGDIOBJ prev; #ifdef MEADOW Pixmap pixmap; #endif /* MEADOW */ #endif /* HAVE_NTGUI */ if (free_ximg) { #ifndef HAVE_NTGUI ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, 0, 0, img->width, img->height, ~0, ZPixmap); #else #ifdef MEADOW Pixmap mask; HDC frame_dc; frame_dc = GET_FRAME_HDC (f); mw32_setup_image_bitmap_handle (frame_dc, img, &pixmap, &mask); Free_Pixmap (FRAME_X_DISPLAY (f), mask); ximg = CreateCompatibleDC (frame_dc); RELEASE_FRAME_HDC (f); prev = SelectObject (ximg, pixmap); #else /* not MEADOW */ HDC frame_dc = get_frame_dc (f); ximg = CreateCompatibleDC (frame_dc); release_frame_dc (f, frame_dc); prev = SelectObject (ximg, img->pixmap); #endif /* not MEADOW */ #endif /* !HAVE_NTGUI */ } img->background = four_corners_best (ximg, img->corners, img->width, img->height); if (free_ximg) Destroy_Image (ximg, prev); #ifdef MEADOW Free_Pixmap (FRAME_X_DISPLAY (f), pixmap); #endif img->background_valid = 1; } return img->background; } /* Return the `background_transparent' field of IMG. If IMG doesn't have one yet, it is guessed heuristically. If non-zero, MASK is an existing XImage object to use for the heuristic. */ int image_background_transparent (img, f, mask) struct image *img; struct frame *f; XImagePtr_or_DC mask; { if (! img->background_transparent_valid) /* IMG doesn't have a background yet, try to guess a reasonable value. */ { if ( #ifdef MEADOW MW32_IMAGE_HAS_MASK_P (img->mw32_img) #else img->mask #endif ) { int free_mask = !mask; #ifdef HAVE_NTGUI HGDIOBJ prev; #ifdef MEADOW Pixmap hmask; #endif /* MEADOW */ #endif /* HAVE_NTGUI */ if (free_mask) { #ifndef HAVE_NTGUI mask = XGetImage (FRAME_X_DISPLAY (f), img->mask, 0, 0, img->width, img->height, ~0, ZPixmap); #else #ifdef MEADOW Pixmap pixmap; HDC frame_dc; frame_dc = GET_FRAME_HDC (f); mw32_setup_image_bitmap_handle (frame_dc, img, &pixmap, &hmask); Free_Pixmap (FRAME_X_DISPLAY (f), pixmap); mask = CreateCompatibleDC (frame_dc); RELEASE_FRAME_HDC (f); prev = SelectObject (mask, hmask); #else /* not MEADOW */ HDC frame_dc = get_frame_dc (f); mask = CreateCompatibleDC (frame_dc); release_frame_dc (f, frame_dc); prev = SelectObject (mask, img->mask); #endif /* not MEADOW */ #endif /* HAVE_NTGUI */ } img->background_transparent = (four_corners_best (mask, img->corners, img->width, img->height) == PIX_MASK_RETAIN); if (free_mask) Destroy_Image (mask, prev); #ifdef MEADOW Free_Pixmap (FRAME_X_DISPLAY (f), hmask); #endif } else img->background_transparent = 0; img->background_transparent_valid = 1; } return img->background_transparent; } /*********************************************************************** Helper functions for X image types ***********************************************************************/ static void x_clear_image_1 P_ ((struct frame *, struct image *, int, int, int)); static void x_clear_image P_ ((struct frame *f, struct image *img)); static unsigned long x_alloc_image_color P_ ((struct frame *f, struct image *img, Lisp_Object color_name, unsigned long dflt)); /* Clear X resources of image IMG on frame F. PIXMAP_P non-zero means free the pixmap if any. MASK_P non-zero means clear the mask pixmap if any. COLORS_P non-zero means free colors allocated for the image, if any. */ static void x_clear_image_1 (f, img, pixmap_p, mask_p, colors_p) struct frame *f; struct image *img; int pixmap_p, mask_p, colors_p; { #ifndef MEADOW if (pixmap_p && img->pixmap) { Free_Pixmap (FRAME_X_DISPLAY (f), img->pixmap); img->pixmap = NO_PIXMAP; img->background_valid = 0; } if (mask_p && img->mask) { Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); img->mask = NO_PIXMAP; img->background_transparent_valid = 0; } if (colors_p && img->ncolors) { /* MAC_TODO: color table support. */ /* W32_TODO: color table support. */ #ifdef HAVE_X_WINDOWS x_free_colors (f, img->colors, img->ncolors); #endif /* HAVE_X_WINDOWS */ xfree (img->colors); img->colors = NULL; img->ncolors = 0; } #endif /* MEADOW */ #if defined (MAC_OS) && USE_CG_DRAWING if (img->data.ptr_val) { CGImageRelease (img->data.ptr_val); img->data.ptr_val = NULL; } #endif } /* Free X resources of image IMG which is used on frame F. */ static void x_clear_image (f, img) struct frame *f; struct image *img; { BLOCK_INPUT; x_clear_image_1 (f, img, 1, 1, 1); UNBLOCK_INPUT; } /* Allocate color COLOR_NAME for image IMG on frame F. If color cannot be allocated, use DFLT. Add a newly allocated color to IMG->colors, so that it can be freed again. Value is the pixel color. */ static unsigned long x_alloc_image_color (f, img, color_name, dflt) struct frame *f; struct image *img; Lisp_Object color_name; unsigned long dflt; { XColor color; unsigned long result; xassert (STRINGP (color_name)); if (x_defined_color (f, SDATA (color_name), &color, 1)) { /* This isn't called frequently so we get away with simply reallocating the color vector to the needed size, here. */ ++img->ncolors; img->colors = (unsigned long *) xrealloc (img->colors, img->ncolors * sizeof *img->colors); img->colors[img->ncolors - 1] = color.pixel; result = color.pixel; } else result = dflt; return result; } /*********************************************************************** Image Cache ***********************************************************************/ static struct image *search_image_cache P_ ((struct frame *, Lisp_Object, unsigned)); static void cache_image P_ ((struct frame *f, struct image *img)); static void postprocess_image P_ ((struct frame *, struct image *)); /* Return a new, initialized image cache that is allocated from the heap. Call free_image_cache to free an image cache. */ struct image_cache * make_image_cache () { struct image_cache *c = (struct image_cache *) xmalloc (sizeof *c); int size; bzero (c, sizeof *c); c->size = 50; c->images = (struct image **) xmalloc (c->size * sizeof *c->images); size = IMAGE_CACHE_BUCKETS_SIZE * sizeof *c->buckets; c->buckets = (struct image **) xmalloc (size); bzero (c->buckets, size); return c; } /* Find an image matching SPEC in the cache, and return it. If no image is found, return NULL. */ static struct image * search_image_cache (f, spec, hash) struct frame *f; Lisp_Object spec; unsigned hash; { struct image *img; struct image_cache *c = FRAME_X_IMAGE_CACHE (f); int i = hash % IMAGE_CACHE_BUCKETS_SIZE; if (!c) return NULL; /* If the image spec does not specify a background color, the cached image must have the same background color as the current frame. The foreground color must also match, for the sake of monochrome images. In fact, we could ignore the foreground color matching condition for color images, or if the image spec specifies :foreground; similarly we could ignore the background color matching condition for formats that don't use transparency (such as jpeg), or if the image spec specifies :background. However, the extra memory usage is probably negligible in practice, so we don't bother. */ for (img = c->buckets[i]; img; img = img->next) if (img->hash == hash && !NILP (Fequal (img->spec, spec)) && img->frame_foreground == FRAME_FOREGROUND_PIXEL (f) && img->frame_background == FRAME_BACKGROUND_PIXEL (f)) break; return img; } /* Search frame F for an image with spec SPEC, and free it. */ static void uncache_image (f, spec) struct frame *f; Lisp_Object spec; { struct image *img = search_image_cache (f, spec, sxhash (spec, 0)); if (img) free_image (f, img); } /* Free image cache of frame F. Be aware that X frames share images caches. */ void free_image_cache (f) struct frame *f; { struct image_cache *c = FRAME_X_IMAGE_CACHE (f); if (c) { int i; /* Cache should not be referenced by any frame when freed. */ xassert (c->refcount == 0); for (i = 0; i < c->used; ++i) free_image (f, c->images[i]); xfree (c->images); xfree (c->buckets); xfree (c); FRAME_X_IMAGE_CACHE (f) = NULL; } } /* Clear image cache of frame F. FORCE_P non-zero means free all images. FORCE_P zero means clear only images that haven't been displayed for some time. Should be called from time to time to reduce the number of loaded images. If image-cache-eviction-delay is non-nil, this frees images in the cache which weren't displayed for at least that many seconds. */ void clear_image_cache (f, force_p) struct frame *f; int force_p; { struct image_cache *c = FRAME_X_IMAGE_CACHE (f); if (c && INTEGERP (Vimage_cache_eviction_delay)) { EMACS_TIME t; unsigned long old; int i, nfreed; EMACS_GET_TIME (t); old = EMACS_SECS (t) - XFASTINT (Vimage_cache_eviction_delay); /* Block input so that we won't be interrupted by a SIGIO while being in an inconsistent state. */ BLOCK_INPUT; for (i = nfreed = 0; i < c->used; ++i) { struct image *img = c->images[i]; if (img != NULL && (force_p || img->timestamp < old)) { free_image (f, img); ++nfreed; } } /* We may be clearing the image cache because, for example, Emacs was iconified for a longer period of time. In that case, current matrices may still contain references to images freed above. So, clear these matrices. */ if (nfreed) { Lisp_Object tail, frame; FOR_EACH_FRAME (tail, frame) { struct frame *f = XFRAME (frame); if (FRAME_WINDOW_P (f) && FRAME_X_IMAGE_CACHE (f) == c) clear_current_matrices (f); } ++windows_or_buffers_changed; } UNBLOCK_INPUT; } } DEFUN ("clear-image-cache", Fclear_image_cache, Sclear_image_cache, 0, 1, 0, doc: /* Clear the image cache of FRAME. FRAME nil or omitted means use the selected frame. FRAME t means clear the image caches of all frames. */) (frame) Lisp_Object frame; { if (EQ (frame, Qt)) { Lisp_Object tail; FOR_EACH_FRAME (tail, frame) if (FRAME_WINDOW_P (XFRAME (frame))) clear_image_cache (XFRAME (frame), 1); } else clear_image_cache (check_x_frame (frame), 1); return Qnil; } DEFUN ("image-refresh", Fimage_refresh, Simage_refresh, 1, 2, 0, doc: /* Refresh the image with specification SPEC on frame FRAME. If SPEC specifies an image file, the displayed image is updated with the current contents of that file. FRAME nil or omitted means use the selected frame. FRAME t means refresh the image on all frames. */) (spec, frame) Lisp_Object spec, frame; { if (!valid_image_p (spec)) error ("Invalid image specification"); if (EQ (frame, Qt)) { Lisp_Object tail; FOR_EACH_FRAME (tail, frame) { struct frame *f = XFRAME (frame); if (FRAME_WINDOW_P (f)) uncache_image (f, spec); } } else uncache_image (check_x_frame (frame), spec); return Qnil; } /* Compute masks and transform image IMG on frame F, as specified by the image's specification, */ static void postprocess_image (f, img) struct frame *f; struct image *img; { /* Manipulation of the image's mask. */ #ifdef MEADOW if (MW32_IMAGE_VALID_P (img->mw32_img)) #else if (img->pixmap) #endif { Lisp_Object conversion, spec; Lisp_Object mask; spec = img->spec; /* `:heuristic-mask t' `:mask heuristic' means build a mask heuristically. `:heuristic-mask (R G B)' `:mask (heuristic (R G B))' means build a mask from color (R G B) in the image. `:mask nil' means remove a mask, if any. */ #ifndef MEADOW mask = image_spec_value (spec, QCheuristic_mask, NULL); if (!NILP (mask)) x_build_heuristic_mask (f, img, mask); else { int found_p; mask = image_spec_value (spec, QCmask, &found_p); if (EQ (mask, Qheuristic)) x_build_heuristic_mask (f, img, Qt); else if (CONSP (mask) && EQ (XCAR (mask), Qheuristic)) { if (CONSP (XCDR (mask))) x_build_heuristic_mask (f, img, XCAR (XCDR (mask))); else x_build_heuristic_mask (f, img, XCDR (mask)); } else if (NILP (mask) && found_p && img->mask) { Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); img->mask = NO_PIXMAP; } } #endif /* MEADOW */ /* Should we apply an image transformation algorithm? */ conversion = image_spec_value (spec, QCconversion, NULL); if (EQ (conversion, Qdisabled)) x_disable_image (f, img); else if (EQ (conversion, Qlaplace)) x_laplace (f, img); else if (EQ (conversion, Qemboss)) x_emboss (f, img); else if (CONSP (conversion) && EQ (XCAR (conversion), Qedge_detection)) { Lisp_Object tem; tem = XCDR (conversion); if (CONSP (tem)) x_edge_detection (f, img, Fplist_get (tem, QCmatrix), Fplist_get (tem, QCcolor_adjustment)); } } } /* Return the id of image with Lisp specification SPEC on frame F. SPEC must be a valid Lisp image specification (see valid_image_p). */ int lookup_image (f, spec) struct frame *f; Lisp_Object spec; { struct image *img; unsigned hash; struct gcpro gcpro1; EMACS_TIME now; /* F must be a window-system frame, and SPEC must be a valid image specification. */ xassert (FRAME_WINDOW_P (f)); xassert (valid_image_p (spec)); GCPRO1 (spec); /* Look up SPEC in the hash table of the image cache. */ hash = sxhash (spec, 0); img = search_image_cache (f, spec, hash); if (img && img->load_failed_p) { free_image (f, img); img = NULL; } /* If not found, create a new image and cache it. */ if (img == NULL) { extern Lisp_Object Qpostscript; BLOCK_INPUT; img = make_image (spec, hash); cache_image (f, img); img->load_failed_p = img->type->load (f, img) == 0; img->frame_foreground = FRAME_FOREGROUND_PIXEL (f); img->frame_background = FRAME_BACKGROUND_PIXEL (f); /* If we can't load the image, and we don't have a width and height, use some arbitrary width and height so that we can draw a rectangle for it. */ if (img->load_failed_p) { Lisp_Object value; value = image_spec_value (spec, QCwidth, NULL); img->width = (INTEGERP (value) ? XFASTINT (value) : DEFAULT_IMAGE_WIDTH); value = image_spec_value (spec, QCheight, NULL); img->height = (INTEGERP (value) ? XFASTINT (value) : DEFAULT_IMAGE_HEIGHT); } else { /* Handle image type independent image attributes `:ascent ASCENT', `:margin MARGIN', `:relief RELIEF', `:background COLOR'. */ Lisp_Object ascent, margin, relief, bg; ascent = image_spec_value (spec, QCascent, NULL); if (INTEGERP (ascent)) img->ascent = XFASTINT (ascent); else if (EQ (ascent, Qcenter)) img->ascent = CENTERED_IMAGE_ASCENT; margin = image_spec_value (spec, QCmargin, NULL); if (INTEGERP (margin) && XINT (margin) >= 0) img->vmargin = img->hmargin = XFASTINT (margin); else if (CONSP (margin) && INTEGERP (XCAR (margin)) && INTEGERP (XCDR (margin))) { if (XINT (XCAR (margin)) > 0) img->hmargin = XFASTINT (XCAR (margin)); if (XINT (XCDR (margin)) > 0) img->vmargin = XFASTINT (XCDR (margin)); } relief = image_spec_value (spec, QCrelief, NULL); if (INTEGERP (relief)) { img->relief = XINT (relief); img->hmargin += abs (img->relief); img->vmargin += abs (img->relief); } if (! img->background_valid) { bg = image_spec_value (img->spec, QCbackground, NULL); if (!NILP (bg)) { img->background = x_alloc_image_color (f, img, bg, FRAME_BACKGROUND_PIXEL (f)); img->background_valid = 1; } } /* Do image transformations and compute masks, unless we don't have the image yet. */ if (!EQ (*img->type->type, Qpostscript)) postprocess_image (f, img); } UNBLOCK_INPUT; } /* We're using IMG, so set its timestamp to `now'. */ EMACS_GET_TIME (now); img->timestamp = EMACS_SECS (now); UNGCPRO; /* Value is the image id. */ return img->id; } /* Cache image IMG in the image cache of frame F. */ static void cache_image (f, img) struct frame *f; struct image *img; { struct image_cache *c = FRAME_X_IMAGE_CACHE (f); int i; /* Find a free slot in c->images. */ for (i = 0; i < c->used; ++i) if (c->images[i] == NULL) break; /* If no free slot found, maybe enlarge c->images. */ if (i == c->used && c->used == c->size) { c->size *= 2; c->images = (struct image **) xrealloc (c->images, c->size * sizeof *c->images); } /* Add IMG to c->images, and assign IMG an id. */ c->images[i] = img; img->id = i; if (i == c->used) ++c->used; /* Add IMG to the cache's hash table. */ i = img->hash % IMAGE_CACHE_BUCKETS_SIZE; img->next = c->buckets[i]; if (img->next) img->next->prev = img; img->prev = NULL; c->buckets[i] = img; } /* Call FN on every image in the image cache of frame F. Used to mark Lisp Objects in the image cache. */ void forall_images_in_image_cache (f, fn) struct frame *f; void (*fn) P_ ((struct image *img)); { if (FRAME_LIVE_P (f) && FRAME_WINDOW_P (f)) { struct image_cache *c = FRAME_X_IMAGE_CACHE (f); if (c) { int i; for (i = 0; i < c->used; ++i) if (c->images[i]) fn (c->images[i]); } } } /*********************************************************************** X / MAC / W32 support code ***********************************************************************/ #ifndef MEADOW #ifdef HAVE_NTGUI /* Macro for defining functions that will be loaded from image DLLs. */ #define DEF_IMGLIB_FN(func) int (FAR CDECL *fn_##func)() /* Macro for loading those image functions from the library. */ #define LOAD_IMGLIB_FN(lib,func) { \ fn_##func = (void *) GetProcAddress (lib, #func); \ if (!fn_##func) return 0; \ } /* Load a DLL implementing an image type. The `image-library-alist' variable associates a symbol, identifying an image type, to a list of possible filenames. The function returns NULL if no library could be loaded for the given image type, or if the library was previously loaded; else the handle of the DLL. */ static HMODULE w32_delayed_load (Lisp_Object libraries, Lisp_Object type) { HMODULE library = NULL; if (CONSP (libraries) && NILP (Fassq (type, Vimage_type_cache))) { Lisp_Object dlls = Fassq (type, libraries); if (CONSP (dlls)) for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls)) { CHECK_STRING_CAR (dlls); if (library = LoadLibrary (SDATA (XCAR (dlls)))) break; } } return library; } #endif /* HAVE_NTGUI */ static int x_create_x_image_and_pixmap P_ ((struct frame *, int, int, int, XImagePtr *, Pixmap *)); static void x_destroy_x_image P_ ((XImagePtr)); static void x_put_x_image P_ ((struct frame *, XImagePtr, Pixmap, int, int)); /* Create an XImage and a pixmap of size WIDTH x HEIGHT for use on frame F. Set *XIMG and *PIXMAP to the XImage and Pixmap created. Set (*XIMG)->data to a raster of WIDTH x HEIGHT pixels allocated via xmalloc. Print error messages via image_error if an error occurs. Value is non-zero if successful. On W32, a DEPTH of zero signifies a 24 bit image, otherwise DEPTH should indicate the bit depth of the image. */ static int x_create_x_image_and_pixmap (f, width, height, depth, ximg, pixmap) struct frame *f; int width, height, depth; XImagePtr *ximg; Pixmap *pixmap; { #ifdef HAVE_X_WINDOWS Display *display = FRAME_X_DISPLAY (f); Window window = FRAME_X_WINDOW (f); Screen *screen = FRAME_X_SCREEN (f); xassert (interrupt_input_blocked); if (depth <= 0) depth = DefaultDepthOfScreen (screen); *ximg = XCreateImage (display, DefaultVisualOfScreen (screen), depth, ZPixmap, 0, NULL, width, height, depth > 16 ? 32 : depth > 8 ? 16 : 8, 0); if (*ximg == NULL) { image_error ("Unable to allocate X image", Qnil, Qnil); return 0; } /* Allocate image raster. */ (*ximg)->data = (char *) xmalloc ((*ximg)->bytes_per_line * height); /* Allocate a pixmap of the same size. */ *pixmap = XCreatePixmap (display, window, width, height, depth); if (*pixmap == NO_PIXMAP) { x_destroy_x_image (*ximg); *ximg = NULL; image_error ("Unable to create X pixmap", Qnil, Qnil); return 0; } return 1; #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI BITMAPINFOHEADER *header; HDC hdc; int scanline_width_bits; int remainder; int palette_colors = 0; if (depth == 0) depth = 24; if (depth != 1 && depth != 4 && depth != 8 && depth != 16 && depth != 24 && depth != 32) { image_error ("Invalid image bit depth specified", Qnil, Qnil); return 0; } scanline_width_bits = width * depth; remainder = scanline_width_bits % 32; if (remainder) scanline_width_bits += 32 - remainder; /* Bitmaps with a depth less than 16 need a palette. */ /* BITMAPINFO structure already contains the first RGBQUAD. */ if (depth < 16) palette_colors = 1 << depth - 1; *ximg = xmalloc (sizeof (XImage) + palette_colors * sizeof (RGBQUAD)); if (*ximg == NULL) { image_error ("Unable to allocate memory for XImage", Qnil, Qnil); return 0; } header = &((*ximg)->info.bmiHeader); bzero (&((*ximg)->info), sizeof (BITMAPINFO)); header->biSize = sizeof (*header); header->biWidth = width; header->biHeight = -height; /* negative indicates a top-down bitmap. */ header->biPlanes = 1; header->biBitCount = depth; header->biCompression = BI_RGB; header->biClrUsed = palette_colors; /* TODO: fill in palette. */ if (depth == 1) { (*ximg)->info.bmiColors[0].rgbBlue = 0; (*ximg)->info.bmiColors[0].rgbGreen = 0; (*ximg)->info.bmiColors[0].rgbRed = 0; (*ximg)->info.bmiColors[0].rgbReserved = 0; (*ximg)->info.bmiColors[1].rgbBlue = 255; (*ximg)->info.bmiColors[1].rgbGreen = 255; (*ximg)->info.bmiColors[1].rgbRed = 255; (*ximg)->info.bmiColors[1].rgbReserved = 0; } hdc = get_frame_dc (f); /* Create a DIBSection and raster array for the bitmap, and store its handle in *pixmap. */ *pixmap = CreateDIBSection (hdc, &((*ximg)->info), (depth < 16) ? DIB_PAL_COLORS : DIB_RGB_COLORS, /* casting avoids a GCC warning */ (void **)&((*ximg)->data), NULL, 0); /* Realize display palette and garbage all frames. */ release_frame_dc (f, hdc); if (*pixmap == NULL) { DWORD err = GetLastError(); Lisp_Object errcode; /* All system errors are < 10000, so the following is safe. */ XSETINT (errcode, (int) err); image_error ("Unable to create bitmap, error code %d", errcode, Qnil); x_destroy_x_image (*ximg); return 0; } return 1; #endif /* HAVE_NTGUI */ #ifdef MAC_OS Display *display = FRAME_X_DISPLAY (f); Window window = FRAME_X_WINDOW (f); xassert (interrupt_input_blocked); /* Allocate a pixmap of the same size. */ *pixmap = XCreatePixmap (display, window, width, height, depth); if (*pixmap == NO_PIXMAP) { *ximg = NULL; image_error ("Unable to create X pixmap", Qnil, Qnil); return 0; } LockPixels (GetGWorldPixMap (*pixmap)); *ximg = *pixmap; return 1; #endif /* MAC_OS */ } /* Destroy XImage XIMG. Free XIMG->data. */ static void x_destroy_x_image (ximg) XImagePtr ximg; { xassert (interrupt_input_blocked); if (ximg) { #ifdef HAVE_X_WINDOWS xfree (ximg->data); ximg->data = NULL; XDestroyImage (ximg); #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI /* Data will be freed by DestroyObject. */ ximg->data = NULL; xfree (ximg); #endif /* HAVE_NTGUI */ #ifdef MAC_OS XDestroyImage (ximg); #endif /* MAC_OS */ } } /* Put XImage XIMG into pixmap PIXMAP on frame F. WIDTH and HEIGHT are width and height of both the image and pixmap. */ static void x_put_x_image (f, ximg, pixmap, width, height) struct frame *f; XImagePtr ximg; Pixmap pixmap; int width, height; { #ifdef HAVE_X_WINDOWS GC gc; xassert (interrupt_input_blocked); gc = XCreateGC (FRAME_X_DISPLAY (f), pixmap, 0, NULL); XPutImage (FRAME_X_DISPLAY (f), pixmap, gc, ximg, 0, 0, 0, 0, width, height); XFreeGC (FRAME_X_DISPLAY (f), gc); #endif /* HAVE_X_WINDOWS */ #ifdef HAVE_NTGUI #if 0 /* I don't think this is necessary looking at where it is used. */ HDC hdc = get_frame_dc (f); SetDIBits (hdc, pixmap, 0, height, ximg->data, &(ximg->info), DIB_RGB_COLORS); release_frame_dc (f, hdc); #endif #endif /* HAVE_NTGUI */ #ifdef MAC_OS xassert (ximg == pixmap); #endif /* MAC_OS */ } #endif /* MEADOW */ /*********************************************************************** File Handling ***********************************************************************/ static unsigned char *slurp_file P_ ((char *, int *)); /* Find image file FILE. Look in data-directory, then x-bitmap-file-path. Value is the encoded full name of the file found, or nil if not found. */ Lisp_Object x_find_image_file (file) Lisp_Object file; { Lisp_Object file_found, search_path; struct gcpro gcpro1, gcpro2; int fd; file_found = Qnil; search_path = Fcons (Vdata_directory, Vx_bitmap_file_path); GCPRO2 (file_found, search_path); /* Try to find FILE in data-directory, then x-bitmap-file-path. */ fd = openp (search_path, file, Qnil, &file_found, Qnil); if (fd == -1) file_found = Qnil; else { file_found = ENCODE_FILE (file_found); close (fd); } UNGCPRO; return file_found; } /* Read FILE into memory. Value is a pointer to a buffer allocated with xmalloc holding FILE's contents. Value is null if an error occurred. *SIZE is set to the size of the file. */ static unsigned char * slurp_file (file, size) char *file; int *size; { FILE *fp = NULL; unsigned char *buf = NULL; struct stat st; if (stat (file, &st) == 0 && (fp = fopen (file, "rb")) != NULL && (buf = (unsigned char *) xmalloc (st.st_size), fread (buf, 1, st.st_size, fp) == st.st_size)) { *size = st.st_size; fclose (fp); } else { if (fp) fclose (fp); if (buf) { xfree (buf); buf = NULL; } } return buf; } #ifdef MAC_OS /*********************************************************************** MAC Image Load Functions ***********************************************************************/ static int image_load_quicktime P_ ((struct frame *, struct image *img, OSType)); #ifdef MAC_OSX static int image_load_quartz2d P_ ((struct frame *, struct image *img, int)); #endif static OSErr find_image_fsspec (specified_file, file, fss) Lisp_Object specified_file, *file; FSSpec *fss; { OSErr err; AEDesc desc; *file = x_find_image_file (specified_file); if (!STRINGP (*file)) return fnfErr; /* file or directory not found; incomplete pathname */ /* Try to open the image file. */ err = AECoercePtr (TYPE_FILE_NAME, SDATA (*file), SBYTES (*file), typeFSS, &desc); if (err == noErr) { #if TARGET_API_MAC_CARBON err = AEGetDescData (&desc, fss, sizeof (FSSpec)); #else *fss = *(FSSpec *)(*(desc.dataHandle)); #endif AEDisposeDesc (&desc); } return err; } static int image_load_qt_1 (f, img, type, fss, dh) struct frame *f; struct image *img; OSType type; const FSSpec *fss; Handle dh; { ComponentResult err; GraphicsImportComponent gi; Rect rect; int width, height; ImageDescriptionHandle desc_handle; short draw_all_pixels; Lisp_Object specified_bg; XColor color; XImagePtr ximg; RGBColor bg_color; err = OpenADefaultComponent (GraphicsImporterComponentType, type, &gi); if (err != noErr) { image_error ("Cannot get importer component for `%s'", img->spec, Qnil); return 0; } if (dh == NULL) { /* read from file system spec */ err = GraphicsImportSetDataFile (gi, fss); if (err != noErr) { image_error ("Cannot set fsspec to graphics importer for '%s'", img->spec, Qnil); goto error; } } else { /* read from data handle */ err = GraphicsImportSetDataHandle (gi, dh); if (err != noErr) { image_error ("Cannot set data handle to graphics importer for `%s'", img->spec, Qnil); goto error; } } err = GraphicsImportGetImageDescription (gi, &desc_handle); if (err != noErr || desc_handle == NULL) { image_error ("Error reading `%s'", img->spec, Qnil); goto error; } width = img->width = (*desc_handle)->width; height = img->height = (*desc_handle)->height; DisposeHandle ((Handle)desc_handle); if (!check_image_size (f, width, height)) { image_error ("Invalid image size", Qnil, Qnil); goto error; } err = GraphicsImportDoesDrawAllPixels (gi, &draw_all_pixels); #if 0 /* Don't check the error code here. It may have an undocumented value -32766. */ if (err != noErr) { image_error ("Error reading `%s'", img->spec, Qnil); goto error; } #endif if (draw_all_pixels != graphicsImporterDrawsAllPixels) { specified_bg = image_spec_value (img->spec, QCbackground, NULL); if (!STRINGP (specified_bg) || !mac_defined_color (f, SDATA (specified_bg), &color, 0)) { color.pixel = FRAME_BACKGROUND_PIXEL (f); color.red = RED16_FROM_ULONG (color.pixel); color.green = GREEN16_FROM_ULONG (color.pixel); color.blue = BLUE16_FROM_ULONG (color.pixel); } } if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) goto error; if (draw_all_pixels != graphicsImporterDrawsAllPixels) { CGrafPtr old_port; GDHandle old_gdh; GetGWorld (&old_port, &old_gdh); SetGWorld (ximg, NULL); bg_color.red = color.red; bg_color.green = color.green; bg_color.blue = color.blue; RGBBackColor (&bg_color); #if TARGET_API_MAC_CARBON GetPortBounds (ximg, &rect); EraseRect (&rect); #else EraseRect (&(ximg->portRect)); #endif SetGWorld (old_port, old_gdh); } GraphicsImportSetGWorld (gi, ximg, NULL); GraphicsImportDraw (gi); CloseComponent (gi); /* Maybe fill in the background field while we have ximg handy. */ if (NILP (image_spec_value (img->spec, QCbackground, NULL))) IMAGE_BACKGROUND (img, f, ximg); /* Put the image into the pixmap. */ x_put_x_image (f, ximg, img->pixmap, width, height); x_destroy_x_image (ximg); return 1; error: CloseComponent (gi); return 0; } /* Load an image using the QuickTime Graphics Importer. Note: The alpha channel does not work for PNG images. */ static int image_load_quicktime (f, img, type) struct frame *f; struct image *img; OSType type; { Lisp_Object specified_file; Lisp_Object specified_data; OSErr err; specified_file = image_spec_value (img->spec, QCfile, NULL); specified_data = image_spec_value (img->spec, QCdata, NULL); if (NILP (specified_data)) { /* Read from a file */ Lisp_Object file; FSSpec fss; err = find_image_fsspec (specified_file, &file, &fss); if (err != noErr) { if (err == fnfErr) image_error ("Cannot find image file `%s'", specified_file, Qnil); else image_error ("Cannot open `%s'", file, Qnil); return 0; } return image_load_qt_1 (f, img, type, &fss, NULL); } else { /* Memory source! */ int success_p; Handle dh; err = PtrToHand (SDATA (specified_data), &dh, SBYTES (specified_data)); if (err != noErr) { image_error ("Cannot allocate data handle for `%s'", img->spec, Qnil); return 0; } success_p = image_load_qt_1 (f, img, type, NULL, dh); DisposeHandle (dh); return success_p; } } #ifdef MAC_OSX /* Load a PNG/JPEG image using Quartz 2D decoding routines. CGImageCreateWithPNGDataProvider is provided after Mac OS X 10.2. So don't use this function directly but determine at runtime whether it exists. */ typedef CGImageRef (*CGImageCreateWithPNGDataProviderProcType) (CGDataProviderRef, const float [], bool, CGColorRenderingIntent); static CGImageCreateWithPNGDataProviderProcType MyCGImageCreateWithPNGDataProvider; static void init_image_func_pointer () { if (NSIsSymbolNameDefined ("_CGImageCreateWithPNGDataProvider")) { MyCGImageCreateWithPNGDataProvider = (CGImageCreateWithPNGDataProviderProcType) NSAddressOfSymbol (NSLookupAndBindSymbol ("_CGImageCreateWithPNGDataProvider")); } else MyCGImageCreateWithPNGDataProvider = NULL; } static int image_load_quartz2d (f, img, png_p) struct frame *f; struct image *img; int png_p; { Lisp_Object file, specified_file; Lisp_Object specified_data, specified_bg; struct gcpro gcpro1; CGDataProviderRef source; CGImageRef image; int width, height; XColor color; XImagePtr ximg = NULL; CGContextRef context; CGRect rectangle; /* Open the file. */ specified_file = image_spec_value (img->spec, QCfile, NULL); specified_data = image_spec_value (img->spec, QCdata, NULL); file = Qnil; GCPRO1 (file); if (NILP (specified_data)) { CFStringRef path; CFURLRef url; file = x_find_image_file (specified_file); if (!STRINGP (file)) { image_error ("Cannot find image file `%s'", specified_file, Qnil); UNGCPRO; return 0; } path = cfstring_create_with_utf8_cstring (SDATA (file)); url = CFURLCreateWithFileSystemPath (NULL, path, kCFURLPOSIXPathStyle, 0); CFRelease (path); source = CGDataProviderCreateWithURL (url); CFRelease (url); } else source = CGDataProviderCreateWithData (NULL, SDATA (specified_data), SBYTES (specified_data), NULL); if (png_p) image = (*MyCGImageCreateWithPNGDataProvider) (source, NULL, FALSE, kCGRenderingIntentDefault); else image = CGImageCreateWithJPEGDataProvider (source, NULL, FALSE, kCGRenderingIntentDefault); CGDataProviderRelease (source); if (image == NULL) { UNGCPRO; image_error ("Error reading image `%s'", img->spec, Qnil); return 0; } width = img->width = CGImageGetWidth (image); height = img->height = CGImageGetHeight (image); if (!check_image_size (f, width, height)) { CGImageRelease (image); UNGCPRO; image_error ("Invalid image size", Qnil, Qnil); return 0; } if (png_p) { specified_bg = image_spec_value (img->spec, QCbackground, NULL); if (!STRINGP (specified_bg) || !mac_defined_color (f, SDATA (specified_bg), &color, 0)) { color.pixel = FRAME_BACKGROUND_PIXEL (f); color.red = RED16_FROM_ULONG (color.pixel); color.green = GREEN16_FROM_ULONG (color.pixel); color.blue = BLUE16_FROM_ULONG (color.pixel); } } if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap)) { CGImageRelease (image); UNGCPRO; return 0; } rectangle = CGRectMake (0, 0, width, height); QDBeginCGContext (ximg, &context); if (png_p) { CGContextSetRGBFillColor (context, color.red / 65535.0, color.green / 65535.0, color.blue / 65535.0, 1.0); CGContextFillRect (context, rectangle); } CGContextDrawImage (context, rectangle, image); QDEndCGContext (ximg, &context); CGImageRelease (image); /* Maybe fill in the background field while we have ximg handy. */ if (NILP (image_spec_value (img->spec, QCbackground, NULL))) IMAGE_BACKGROUND (img, f, ximg); /* Put the image into the pixmap. */ x_put_x_image (f, ximg, img->pixmap, width, height); x_destroy_x_image (ximg); UNGCPRO; return 1; } #endif #endif /* MAC_OS */ /*********************************************************************** XBM images ***********************************************************************/ #ifndef MEADOW static int xbm_scan P_ ((unsigned char **, unsigned char *, char *, int *)); static int xbm_load P_ ((struct frame *f, struct image *img)); static int xbm_load_image P_ ((struct frame *f, struct image *img, unsigned char *, unsigned char *)); static int xbm_image_p P_ ((Lisp_Object object)); static int xbm_read_bitmap_data P_ ((struct frame *f, unsigned char *, unsigned char *, int *, int *, unsigned char **)); static int xbm_file_p P_ ((Lisp_Object)); /* Indices of image specification fields in xbm_format, below. */ enum xbm_keyword_index { XBM_TYPE, XBM_FILE, XBM_WIDTH, XBM_HEIGHT, XBM_DATA, XBM_FOREGROUND, XBM_BACKGROUND, XBM_ASCENT, XBM_MARGIN, XBM_RELIEF, XBM_ALGORITHM, XBM_HEURISTIC_MASK, XBM_MASK, XBM_LAST }; /* Vector of image_keyword structures describing the format of valid XBM image specifications. */ static struct image_keyword xbm_format[XBM_LAST] = { {":type", IMAGE_SYMBOL_VALUE, 1}, {":file", IMAGE_STRING_VALUE, 0}, {":width", IMAGE_POSITIVE_INTEGER_VALUE, 0}, {":height", IMAGE_POSITIVE_INTEGER_VALUE, 0}, {":data", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":foreground", IMAGE_STRING_OR_NIL_VALUE, 0}, {":background", IMAGE_STRING_OR_NIL_VALUE, 0}, {":ascent", IMAGE_ASCENT_VALUE, 0}, {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, {":relief", IMAGE_INTEGER_VALUE, 0}, {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0} }; /* Structure describing the image type XBM. */ static struct image_type xbm_type = { &Qxbm, xbm_image_p, xbm_load, x_clear_image, NULL }; /* Tokens returned from xbm_scan. */ enum xbm_token { XBM_TK_IDENT = 256, XBM_TK_NUMBER }; /* Return non-zero if OBJECT is a valid XBM-type image specification. A valid specification is a list starting with the symbol `image' The rest of the list is a property list which must contain an entry `:type xbm.. If the specification specifies a file to load, it must contain an entry `:file FILENAME' where FILENAME is a string. If the specification is for a bitmap loaded from memory it must contain `:width WIDTH', `:height HEIGHT', and `:data DATA', where WIDTH and HEIGHT are integers > 0. DATA may be: 1. a string large enough to hold the bitmap data, i.e. it must have a size >= (WIDTH + 7) / 8 * HEIGHT 2. a bool-vector of size >= WIDTH * HEIGHT 3. a vector of strings or bool-vectors, one for each line of the bitmap. 4. a string containing an in-memory XBM file. WIDTH and HEIGHT may not be specified in this case because they are defined in the XBM file. Both the file and data forms may contain the additional entries `:background COLOR' and `:foreground COLOR'. If not present, foreground and background of the frame on which the image is displayed is used. */ static int xbm_image_p (object) Lisp_Object object; { struct image_keyword kw[XBM_LAST]; bcopy (xbm_format, kw, sizeof kw); if (!parse_image_spec (object, kw, XBM_LAST, Qxbm)) return 0; xassert (EQ (kw[XBM_TYPE].value, Qxbm)); if (kw[XBM_FILE].count) { if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_DATA].count) return 0; } else if (kw[XBM_DATA].count && xbm_file_p (kw[XBM_DATA].value)) { /* In-memory XBM file. */ if (kw[XBM_WIDTH].count || kw[XBM_HEIGHT].count || kw[XBM_FILE].count) return 0; } else { Lisp_Object data; int width, height; /* Entries for `:width', `:height' and `:data' must be present. */ if (!kw[XBM_WIDTH].count || !kw[XBM_HEIGHT].count || !kw[XBM_DATA].count) return 0; data = kw[XBM_DATA].value; width = XFASTINT (kw[XBM_WIDTH].value); height = XFASTINT (kw[XBM_HEIGHT].value); /* Check type of data, and width and height against contents of data. */ if (VECTORP (data)) { int i; /* Number of elements of the vector must be >= height. */ if (XVECTOR (data)->size < height) return 0; /* Each string or bool-vector in data must be large enough for one line of the image. */ for (i = 0; i < height; ++i) { Lisp_Object elt = XVECTOR (data)->contents[i]; if (STRINGP (elt)) { if (SCHARS (elt) < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR) return 0; } else if (BOOL_VECTOR_P (elt)) { if (XBOOL_VECTOR (elt)->size < width) return 0; } else return 0; } } else if (STRINGP (data)) { if (SCHARS (data) < (width + BITS_PER_CHAR - 1) / BITS_PER_CHAR * height) return 0; } else if (BOOL_VECTOR_P (data)) { if (XBOOL_VECTOR (data)->size < width * height) return 0; } else return 0; } return 1; } /* Scan a bitmap file. FP is the stream to read from. Value is either an enumerator from enum xbm_token, or a character for a single-character token, or 0 at end of file. If scanning an identifier, store the lexeme of the identifier in SVAL. If scanning a number, store its value in *IVAL. */ static int xbm_scan (s, end, sval, ival) unsigned char **s, *end; char *sval; int *ival; { unsigned int c; loop: /* Skip white space. */ while (*s < end && (c = *(*s)++, isspace (c))) ; if (*s >= end) c = 0; else if (isdigit (c)) { int value = 0, digit; if (c == '0' && *s < end) { c = *(*s)++; if (c == 'x' || c == 'X') { while (*s < end) { c = *(*s)++; if (isdigit (c)) digit = c - '0'; else if (c >= 'a' && c <= 'f') digit = c - 'a' + 10; else if (c >= 'A' && c <= 'F') digit = c - 'A' + 10; else break; value = 16 * value + digit; } } else if (isdigit (c)) { value = c - '0'; while (*s < end && (c = *(*s)++, isdigit (c))) value = 8 * value + c - '0'; } } else { value = c - '0'; while (*s < end && (c = *(*s)++, isdigit (c))) value = 10 * value + c - '0'; } if (*s < end) *s = *s - 1; *ival = value; c = XBM_TK_NUMBER; } else if (isalpha (c) || c == '_') { *sval++ = c; while (*s < end && (c = *(*s)++, (isalnum (c) || c == '_'))) *sval++ = c; *sval = 0; if (*s < end) *s = *s - 1; c = XBM_TK_IDENT; } else if (c == '/' && **s == '*') { /* C-style comment. */ ++*s; while (**s && (**s != '*' || *(*s + 1) != '/')) ++*s; if (**s) { *s += 2; goto loop; } } return c; } #ifdef HAVE_NTGUI /* Create a Windows bitmap from X bitmap data. */ static HBITMAP w32_create_pixmap_from_bitmap_data (int width, int height, char *data) { static unsigned char swap_nibble[16] = { 0x0, 0x8, 0x4, 0xc, /* 0000 1000 0100 1100 */ 0x2, 0xa, 0x6, 0xe, /* 0010 1010 0110 1110 */ 0x1, 0x9, 0x5, 0xd, /* 0001 1001 0101 1101 */ 0x3, 0xb, 0x7, 0xf }; /* 0011 1011 0111 1111 */ int i, j, w1, w2; unsigned char *bits, *p; HBITMAP bmp; w1 = (width + 7) / 8; /* nb of 8bits elt in X bitmap */ w2 = ((width + 15) / 16) * 2; /* nb of 16bits elt in W32 bitmap */ bits = (unsigned char *) alloca (height * w2); bzero (bits, height * w2); for (i = 0; i < height; i++) { p = bits + i*w2; for (j = 0; j < w1; j++) { /* Bitswap XBM bytes to match how Windows does things. */ unsigned char c = *data++; *p++ = (unsigned char)((swap_nibble[c & 0xf] << 4) | (swap_nibble[(c>>4) & 0xf])); } } bmp = CreateBitmap (width, height, 1, 1, (char *) bits); return bmp; } static void convert_mono_to_color_image (f, img, foreground, background) struct frame *f; struct image *img; COLORREF foreground, background; { HDC hdc, old_img_dc, new_img_dc; HGDIOBJ old_prev, new_prev; HBITMAP new_pixmap; hdc = get_frame_dc (f); old_img_dc = CreateCompatibleDC (hdc); new_img_dc = CreateCompatibleDC (hdc); new_pixmap = CreateCompatibleBitmap (hdc, img->width, img->height); release_frame_dc (f, hdc); old_prev = SelectObject (old_img_dc, img->pixmap); new_prev = SelectObject (new_img_dc, new_pixmap); /* Windows convention for mono bitmaps is black = background, white = foreground. */ SetTextColor (new_img_dc, background); SetBkColor (new_img_dc, foreground); BitBlt (new_img_dc, 0, 0, img->width, img->height, old_img_dc, 0, 0, SRCCOPY); SelectObject (old_img_dc, old_prev); SelectObject (new_img_dc, new_prev); DeleteDC (old_img_dc); DeleteDC (new_img_dc); DeleteObject (img->pixmap); if (new_pixmap == 0) fprintf (stderr, "Failed to convert image to color.\n"); else img->pixmap = new_pixmap; } #define XBM_BIT_SHUFFLE(b) (~(b)) #else #define XBM_BIT_SHUFFLE(b) (b) #endif /* HAVE_NTGUI */ static void Create_Pixmap_From_Bitmap_Data(f, img, data, fg, bg, non_default_colors) struct frame *f; struct image *img; char *data; RGB_PIXEL_COLOR fg, bg; int non_default_colors; { #ifdef HAVE_NTGUI img->pixmap = w32_create_pixmap_from_bitmap_data (img->width, img->height, data); /* If colors were specified, transfer the bitmap to a color one. */ if (non_default_colors) convert_mono_to_color_image (f, img, fg, bg); #else img->pixmap = XCreatePixmapFromBitmapData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), data, img->width, img->height, fg, bg, DefaultDepthOfScreen (FRAME_X_SCREEN (f))); #endif /* HAVE_NTGUI */ } /* Replacement for XReadBitmapFileData which isn't available under old X versions. CONTENTS is a pointer to a buffer to parse; END is the buffer's end. Set *WIDTH and *HEIGHT to the width and height of the image. Return in *DATA the bitmap data allocated with xmalloc. Value is non-zero if successful. DATA null means just test if CONTENTS looks like an in-memory XBM file. */ static int xbm_read_bitmap_data (f, contents, end, width, height, data) struct frame *f; unsigned char *contents, *end; int *width, *height; unsigned char **data; { unsigned char *s = contents; char buffer[BUFSIZ]; int padding_p = 0; int v10 = 0; int bytes_per_line, i, nbytes; unsigned char *p; int value; int LA1; #define match() \ LA1 = xbm_scan (&s, end, buffer, &value) #define expect(TOKEN) \ if (LA1 != (TOKEN)) \ goto failure; \ else \ match () #define expect_ident(IDENT) \ if (LA1 == XBM_TK_IDENT && strcmp (buffer, (IDENT)) == 0) \ match (); \ else \ goto failure *width = *height = -1; if (data) *data = NULL; LA1 = xbm_scan (&s, end, buffer, &value); /* Parse defines for width, height and hot-spots. */ while (LA1 == '#') { match (); expect_ident ("define"); expect (XBM_TK_IDENT); if (LA1 == XBM_TK_NUMBER) { char *p = strrchr (buffer, '_'); p = p ? p + 1 : buffer; if (strcmp (p, "width") == 0) *width = value; else if (strcmp (p, "height") == 0) *height = value; } expect (XBM_TK_NUMBER); } if (!check_image_size (f, *width, *height)) goto failure; else if (data == NULL) goto success; /* Parse bits. Must start with `static'. */ expect_ident ("static"); if (LA1 == XBM_TK_IDENT) { if (strcmp (buffer, "unsigned") == 0) { match (); expect_ident ("char"); } else if (strcmp (buffer, "short") == 0) { match (); v10 = 1; if (*width % 16 && *width % 16 < 9) padding_p = 1; } else if (strcmp (buffer, "char") == 0) match (); else goto failure; } else goto failure; expect (XBM_TK_IDENT); expect ('['); expect (']'); expect ('='); expect ('{'); bytes_per_line = (*width + 7) / 8 + padding_p; nbytes = bytes_per_line * *height; p = *data = (unsigned char *) xmalloc (nbytes); if (v10) { for (i = 0; i < nbytes; i += 2) { int val = value; expect (XBM_TK_NUMBER); *p++ = XBM_BIT_SHUFFLE (val); if (!padding_p || ((i + 2) % bytes_per_line)) *p++ = XBM_BIT_SHUFFLE (value >> 8); if (LA1 == ',' || LA1 == '}') match (); else goto failure; } } else { for (i = 0; i < nbytes; ++i) { int val = value; expect (XBM_TK_NUMBER); *p++ = XBM_BIT_SHUFFLE (val); if (LA1 == ',' || LA1 == '}') match (); else goto failure; } } success: return 1; failure: if (data && *data) { xfree (*data); *data = NULL; } return 0; #undef match #undef expect #undef expect_ident } /* Load XBM image IMG which will be displayed on frame F from buffer CONTENTS. END is the end of the buffer. Value is non-zero if successful. */ static int xbm_load_image (f, img, contents, end) struct frame *f; struct image *img; unsigned char *contents, *end; { int rc; unsigned char *data; int success_p = 0; rc = xbm_read_bitmap_data (f, contents, end, &img->width, &img->height, &data); if (rc) { unsigned long foreground = FRAME_FOREGROUND_PIXEL (f); unsigned long background = FRAME_BACKGROUND_PIXEL (f); int non_default_colors = 0; Lisp_Object value; xassert (img->width > 0 && img->height > 0); /* Get foreground and background colors, maybe allocate colors. */ value = image_spec_value (img->spec, QCforeground, NULL); if (!NILP (value)) { foreground = x_alloc_image_color (f, img, value, foreground); non_default_colors = 1; } value = image_spec_value (img->spec, QCbackground, NULL); if (!NILP (value)) { background = x_alloc_image_color (f, img, value, background); img->background = background; img->background_valid = 1; non_default_colors = 1; } Create_Pixmap_From_Bitmap_Data (f, img, data, foreground, background, non_default_colors); xfree (data); if (img->pixmap == NO_PIXMAP) { x_clear_image (f, img); image_error ("Unable to create X pixmap for `%s'", img->spec, Qnil); } else success_p = 1; } else image_error ("Error loading XBM image `%s'", img->spec, Qnil); return success_p; } /* Value is non-zero if DATA looks like an in-memory XBM file. */ static int xbm_file_p (data) Lisp_Object data; { int w, h; return (STRINGP (data) && xbm_read_bitmap_data (NULL, SDATA (data), (SDATA (data) + SBYTES (data)), &w, &h, NULL)); } /* Fill image IMG which is used on frame F with pixmap data. Value is non-zero if successful. */ static int xbm_load (f, img) struct frame *f; struct image *img; { int success_p = 0; Lisp_Object file_name; xassert (xbm_image_p (img->spec)); /* If IMG->spec specifies a file name, create a non-file spec from it. */ file_name = image_spec_value (img->spec, QCfile, NULL); if (STRINGP (file_name)) { Lisp_Object file; unsigned char *contents; int size; struct gcpro gcpro1; file = x_find_image_file (file_name); GCPRO1 (file); if (!STRINGP (file)) { image_error ("Cannot find image file `%s'", file_name, Qnil); UNGCPRO; return 0; } contents = slurp_file (SDATA (file), &size); if (contents == NULL) { image_error ("Error loading XBM image `%s'", img->spec, Qnil); UNGCPRO; return 0; } success_p = xbm_load_image (f, img, contents, contents + size); UNGCPRO; } else { struct image_keyword fmt[XBM_LAST]; Lisp_Object data; unsigned long foreground = FRAME_FOREGROUND_PIXEL (f); unsigned long background = FRAME_BACKGROUND_PIXEL (f); int non_default_colors = 0; char *bits; int parsed_p; int in_memory_file_p = 0; /* See if data looks like an in-memory XBM file. */ data = image_spec_value (img->spec, QCdata, NULL); in_memory_file_p = xbm_file_p (data); /* Parse the image specification. */ bcopy (xbm_format, fmt, sizeof fmt); parsed_p = parse_image_spec (img->spec, fmt, XBM_LAST, Qxbm); xassert (parsed_p); /* Get specified width, and height. */ if (!in_memory_file_p) { img->width = XFASTINT (fmt[XBM_WIDTH].value); img->height = XFASTINT (fmt[XBM_HEIGHT].value); xassert (img->width > 0 && img->height > 0); } /* Get foreground and background colors, maybe allocate colors. */ if (fmt[XBM_FOREGROUND].count && STRINGP (fmt[XBM_FOREGROUND].value)) { foreground = x_alloc_image_color (f, img, fmt[XBM_FOREGROUND].value, foreground); non_default_colors = 1; } if (fmt[XBM_BACKGROUND].count && STRINGP (fmt[XBM_BACKGROUND].value)) { background = x_alloc_image_color (f, img, fmt[XBM_BACKGROUND].value, background); non_default_colors = 1; } if (in_memory_file_p) success_p = xbm_load_image (f, img, SDATA (data), (SDATA (data) + SBYTES (data))); else { if (VECTORP (data)) { int i; char *p; int nbytes = (img->width + BITS_PER_CHAR - 1) / BITS_PER_CHAR; p = bits = (char *) alloca (nbytes * img->height); for (i = 0; i < img->height; ++i, p += nbytes) { Lisp_Object line = XVECTOR (data)->contents[i]; if (STRINGP (line)) bcopy (SDATA (line), p, nbytes); else bcopy (XBOOL_VECTOR (line)->data, p, nbytes); } } else if (STRINGP (data)) bits = SDATA (data); else bits = XBOOL_VECTOR (data)->data; #ifdef WINDOWSNT { char *invertedBits; int nbytes, i; /* Windows mono bitmaps are reversed compared with X. */ invertedBits = bits; nbytes = (img->width + BITS_PER_CHAR - 1) / BITS_PER_CHAR * img->height; bits = (char *) alloca(nbytes); for (i = 0; i < nbytes; i++) bits[i] = XBM_BIT_SHUFFLE (invertedBits[i]); } #endif /* Create the pixmap. */ Create_Pixmap_From_Bitmap_Data (f, img, bits, foreground, background, non_default_colors); if (img->pixmap) success_p = 1; else { image_error ("Unable to create pixmap for XBM image `%s'", img->spec, Qnil); x_clear_image (f, img); } } } return success_p; } /*********************************************************************** XPM images ***********************************************************************/ #if defined (HAVE_XPM) || defined (MAC_OS) static int xpm_image_p P_ ((Lisp_Object object)); static int xpm_load P_ ((struct frame *f, struct image *img)); static int xpm_valid_color_symbols_p P_ ((Lisp_Object)); #endif /* HAVE_XPM || MAC_OS */ #ifdef HAVE_XPM #ifdef HAVE_NTGUI /* Indicate to xpm.h that we don't have Xlib. */ #define FOR_MSW /* simx.h in xpm defines XColor and XImage differently than Emacs. */ /* It also defines Display the same way as Emacs, but gcc 3.3 still barfs. */ #define XColor xpm_XColor #define XImage xpm_XImage #define Display xpm_Display #define PIXEL_ALREADY_TYPEDEFED #include "X11/xpm.h" #undef FOR_MSW #undef XColor #undef XImage #undef Display #undef PIXEL_ALREADY_TYPEDEFED #else #include "X11/xpm.h" #endif /* HAVE_NTGUI */ #endif /* HAVE_XPM */ #if defined (HAVE_XPM) || defined (MAC_OS) /* The symbol `xpm' identifying XPM-format images. */ Lisp_Object Qxpm; /* Indices of image specification fields in xpm_format, below. */ enum xpm_keyword_index { XPM_TYPE, XPM_FILE, XPM_DATA, XPM_ASCENT, XPM_MARGIN, XPM_RELIEF, XPM_ALGORITHM, XPM_HEURISTIC_MASK, XPM_MASK, XPM_COLOR_SYMBOLS, XPM_BACKGROUND, XPM_LAST }; /* Vector of image_keyword structures describing the format of valid XPM image specifications. */ static struct image_keyword xpm_format[XPM_LAST] = { {":type", IMAGE_SYMBOL_VALUE, 1}, {":file", IMAGE_STRING_VALUE, 0}, {":data", IMAGE_STRING_VALUE, 0}, {":ascent", IMAGE_ASCENT_VALUE, 0}, {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR, 0}, {":relief", IMAGE_INTEGER_VALUE, 0}, {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":mask", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":color-symbols", IMAGE_DONT_CHECK_VALUE_TYPE, 0}, {":background", IMAGE_STRING_OR_NIL_VALUE, 0} }; /* Structure describing the image type XPM. */ static struct image_type xpm_type = { &Qxpm, xpm_image_p, xpm_load, x_clear_image, NULL }; #ifdef HAVE_X_WINDOWS /* Define ALLOC_XPM_COLORS if we can use Emacs' own color allocation functions for allocating image colors. Our own functions handle color allocation failures more gracefully than the ones on the XPM lib. */ #if defined XpmAllocColor && defined XpmFreeColors && defined XpmColorClosure #define ALLOC_XPM_COLORS #endif #endif /* HAVE_X_WINDOWS */ #ifdef ALLOC_XPM_COLORS static void xpm_init_color_cache P_ ((struct frame *, XpmAttributes *)); static void xpm_free_color_cache P_ ((void)); static int xpm_lookup_color P_ ((struct frame *, char *, XColor *)); static int xpm_color_bucket P_ ((char *)); static struct xpm_cached_color *xpm_cache_color P_ ((struct frame *, char *, XColor *, int)); /* An entry in a hash table used to cache color definitions of named colors. This cache is necessary to speed up XPM image loading in case we do color allocations ourselves. Without it, we would need a call to XParseColor per pixel in the image. */ struct xpm_cached_color { /* Next in collision chain. */ struct xpm_cached_color *next; /* Color definition (RGB and pixel color). */ XColor color; /* Color name. */ char name[1]; }; /* The hash table used for the color cache, and its bucket vector size. */ #define XPM_COLOR_CACHE_BUCKETS 1001 struct xpm_cached_color **xpm_color_cache; /* Initialize the color cache. */ static void xpm_init_color_cache (f, attrs) struct frame *f; XpmAttributes *attrs; { size_t nbytes = XPM_COLOR_CACHE_BUCKETS * sizeof *xpm_color_cache; xpm_color_cache = (struct xpm_cached_color **) xmalloc (nbytes); memset (xpm_color_cache, 0, nbytes); init_color_table (); if (attrs->valuemask & XpmColorSymbols) { int i; XColor color; for (i = 0; i < attrs->numsymbols; ++i) if (XParseColor (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), attrs->colorsymbols[i].value, &color)) { color.pixel = lookup_rgb_color (f, color.red, color.green, color.blue); xpm_cache_color (f, attrs->colorsymbols[i].name, &color, -1); } } } /* Free the color cache. */ static void xpm_free_color_cache () { struct xpm_cached_color *p, *next; int i; for (i = 0; i < XPM_COLOR_CACHE_BUCKETS; ++i) for (p = xpm_color_cache[i]; p; p = next) { next = p->next; xfree (p); } xfree (xpm_color_cache); xpm_color_cache = NULL; free_color_table (); } /* Return the bucket index for color named COLOR_NAME in the color cache. */ static int xpm_color_bucket (color_name) char *color_name; { unsigned h = 0; char *s; for (s = color_name; *s; ++s) h = (h << 2) ^ *s; return h %= XPM_COLOR_CACHE_BUCKETS; } /* On frame F, cache values COLOR for color with name COLOR_NAME. BUCKET, if >= 0, is a precomputed bucket index. Value is the cache entry added. */ static struct xpm_cached_color * xpm_cache_color (f, color_name, color, bucket) struct frame *f; char *color_name; XColor *color; int bucket; { size_t nbytes; struct xpm_cached_color *p; if (bucket < 0) bucket = xpm_color_bucket (color_name); nbytes = sizeof *p + strlen (color_name); p = (struct xpm_cached_color *) xmalloc (nbytes); strcpy (p->name, color_name); p->color = *color; p->next = xpm_color_cache[bucket]; xpm_color_cache[bucket] = p; return p; } /* Look up color COLOR_NAME for frame F in the color cache. If found, return the cached definition in *COLOR. Otherwise, make a new entry in the cache and allocate the color. Value is zero if color allocation failed. */ static int xpm_lookup_color (f, color_name, color) struct frame *f; char *color_name; XColor *color; { struct xpm_cached_color *p; int h = xpm_color_bucket (color_name); for (p = xpm_color_cache[h]; p; p = p->next) if (strcmp (p->name, color_name) == 0) break; if (p != NULL) *color = p->color; else if (XParseColor (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), color_name, color)) { color->pixel = lookup_rgb_color (f, color->red, color->green, color->blue); p = xpm_cache_color (f, color_name, color, h); } /* You get `opaque' at least from ImageMagick converting pbm to xpm with transparency, and it's useful. */ else if (strcmp ("opaque", color_name) == 0) { bzero (color, sizeof (XColor)); /* Is this necessary/correct? */ color->pixel = FRAME_FOREGROUND_PIXEL (f); p = xpm_cache_color (f, color_name, color, h); } return p != NULL; } /* Callback for allocating color COLOR_NAME. Called from the XPM lib. CLOSURE is a pointer to the frame on which we allocate the color. Return in *COLOR the allocated color. Value is non-zero if successful. */ static int xpm_alloc_color (dpy, cmap, color_name, color, closure) Display *dpy; Colormap cmap; char *color_name; XColor *color; void *closure; { return xpm_lookup_color ((struct frame *) closure, color_name, color); } /* Callback for freeing NPIXELS colors contained in PIXELS. CLOSURE is a pointer to the frame on which we allocate the color. Value is non-zero if successful. */ static int xpm_free_colors (dpy, cmap, pixels, npixels, closure) Display *dpy; Colormap cmap; Pixel *pixels; int npixels; void *closure; { return 1; } #endif /* ALLOC_XPM_COLORS */ #ifdef HAVE_NTGUI /* XPM library details. */ DEF_IMGLIB_FN (XpmFreeAttributes); DEF_IMGLIB_FN (XpmCreateImageFromBuffer); DEF_IMGLIB_FN (XpmReadFileToImage); DEF_IMGLIB_FN (XImageFree); static int init_xpm_functions (Lisp_Object libraries) { HMODULE library; if (!(library = w32_delayed_load (libraries, Qxpm))) return 0; LOAD_IMGLIB_FN (library, XpmFreeAttributes); LOAD_IMGLIB_FN (library, XpmCreateImageFromBuffer); LOAD_IMGLIB_FN (library, XpmReadFileToImage); LOAD_IMGLIB_FN (library, XImageFree); return 1; } #endif /* HAVE_NTGUI */ /* Value is non-zero if COLOR_SYMBOLS is a valid color symbols list for XPM images. Such a list must consist of conses whose car and cdr are strings. */ static int xpm_valid_color_symbols_p (color_symbols) Lisp_Object color_symbols; { while (CONSP (color_symbols)) { Lisp_Object sym = XCAR (color_symbols); if (!CONSP (sym) || !STRINGP (XCAR (sym)) || !STRINGP (XCDR (sym))) break; color_symbols = XCDR (color_symbols); } return NILP (color_symbols); } /* Value is non-zero if OBJECT is a valid XPM image specification. */ static int xpm_image_p (object) Lisp_Object object; { struct image_keyword fmt[XPM_LAST]; bcopy (xpm_format, fmt, sizeof fmt); return (parse_image_spec (object, fmt, XPM_LAST, Qxpm) /* Either `:file' or `:data' must be present. */ && fmt[XPM_FILE].count + fmt[XPM_DATA].count == 1 /* Either no `:color-symbols' or it's a list of conses whose car and cdr are strings. */ && (fmt[XPM_COLOR_SYMBOLS].count == 0 || xpm_valid_color_symbols_p (fmt[XPM_COLOR_SYMBOLS].value))); } #endif /* HAVE_XPM || MAC_OS */ #if defined (HAVE_XPM) && defined (HAVE_X_WINDOWS) int x_create_bitmap_from_xpm_data (f, bits) struct frame *f; char **bits; { Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); int id, rc; XpmAttributes attrs; Pixmap bitmap, mask; bzero (&attrs, sizeof attrs); attrs.visual = FRAME_X_VISUAL (f); attrs.colormap = FRAME_X_COLORMAP (f); attrs.valuemask |= XpmVisual; attrs.valuemask |= XpmColormap; rc = XpmCreatePixmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), bits, &bitmap, &mask, &attrs); if (rc != XpmSuccess) { XpmFreeAttributes (&attrs); return -1; } id = x_allocate_bitmap_record (f); dpyinfo->bitmaps[id - 1].pixmap = bitmap; dpyinfo->bitmaps[id - 1].have_mask = 1; dpyinfo->bitmaps[id - 1].mask = mask; dpyinfo->bitmaps[id - 1].file = NULL; dpyinfo->bitmaps[id - 1].height = attrs.height; dpyinfo->bitmaps[id - 1].width = attrs.width; dpyinfo->bitmaps[id - 1].depth = attrs.depth; dpyinfo->bitmaps[id - 1].refcount = 1; XpmFreeAttributes (&attrs); return id; } #endif /* defined (HAVE_XPM) && defined (HAVE_X_WINDOWS) */ /* Load image IMG which will be displayed on frame F. Value is non-zero if successful. */ #ifdef HAVE_XPM static int xpm_load (f, img) struct frame *f; struct image *img; { int rc; XpmAttributes attrs; Lisp_Object specified_file, color_symbols; #ifdef HAVE_NTGUI HDC hdc; xpm_XImage * xpm_image = NULL, * xpm_mask = NULL; #endif /* HAVE_NTGUI */ /* Configure the XPM lib. Use the visual of frame F. Allocate close colors. Return colors allocated. */ bzero (&attrs, sizeof attrs); #ifndef HAVE_NTGUI attrs.visual = FRAME_X_VISUAL (f); attrs.colormap = FRAME_X_COLORMAP (f); attrs.valuemask |= XpmVisual; attrs.valuemask |= XpmColormap; #endif /* HAVE_NTGUI */ #ifdef ALLOC_XPM_COLORS /* Allocate colors with our own functions which handle failing color allocation more gracefully. */ attrs.color_closure = f; attrs.alloc_color = xpm_alloc_color; attrs.free_colors = xpm_free_colors; attrs.valuemask |= XpmAllocColor | XpmFreeColors | XpmColorClosure; #else /* not ALLOC_XPM_COLORS */ /* Let the XPM lib allocate colors. */ attrs.valuemask |= XpmReturnAllocPixels; #ifdef XpmAllocCloseColors attrs.alloc_close_colors = 1; attrs.valuemask |= XpmAllocCloseColors; #else /* not XpmAllocCloseColors */ attrs.closeness = 600; attrs.valuemask |= XpmCloseness; #endif /* not XpmAllocCloseColors */ #endif /* ALLOC_XPM_COLORS */ /* If image specification contains symbolic color definitions, add these to `attrs'. */ color_symbols = image_spec_value (img->spec, QCcolor_symbols, NULL); if (CONSP (color_symbols)) { Lisp_Object tail; XpmColorSymbol *xpm_syms; int i, size; attrs.valuemask |= XpmColorSymbols; /* Count number of symbols. */ attrs.numsymbols = 0; for (tail = color_symbols; CONSP (tail); tail = XCDR (tail)) ++attrs.numsymbols; /* Allocate an XpmColorSymbol array. */ size = attrs.numsymbols * sizeof *xpm_syms; xpm_syms = (XpmColorSymbol *) alloca (size); bzero (xpm_syms, size); attrs.colorsymbols = xpm_syms; /* Fill the color symbol array. */ for (tail = color_symbols, i = 0; CONSP (tail); ++i, tail = XCDR (tail)) { Lisp_Object name = XCAR (XCAR (tail)); Lisp_Object color = XCDR (XCAR (tail)); xpm_syms[i].name = (char *) alloca (SCHARS (name) + 1); strcpy (xpm_syms[i].name, SDATA (name)); xpm_syms[i].value = (char *) alloca (SCHARS (color) + 1); strcpy (xpm_syms[i].value, SDATA (color)); } } /* Create a pixmap for the image, either from a file, or from a string buffer containing data in the same format as an XPM file. */ #ifdef ALLOC_XPM_COLORS xpm_init_color_cache (f, &attrs); #endif specified_file = image_spec_value (img->spec, QCfile, NULL); #ifdef HAVE_NTGUI { HDC frame_dc = get_frame_dc (f); hdc = CreateCompatibleDC (frame_dc); release_frame_dc (f, frame_dc); } #endif /* HAVE_NTGUI */ if (STRINGP (specified_file)) { Lisp_Object file = x_find_image_file (specified_file); if (!STRINGP (file)) { image_error ("Cannot find image file `%s'", specified_file, Qnil); return 0; } #ifdef HAVE_NTGUI /* XpmReadFileToPixmap is not available in the Windows port of libxpm. But XpmReadFileToImage almost does what we want. */ rc = fn_XpmReadFileToImage (&hdc, SDATA (file), &xpm_image, &xpm_mask, &attrs); #else rc = XpmReadFileToPixmap (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), SDATA (file), &img->pixmap, &img->mask, &attrs); #endif /* HAVE_NTGUI */ } else { Lisp_Object buffer = image_spec_value (img->spec, QCdata, NULL); #ifdef HAVE_NTGUI /* XpmCreatePixmapFromBuffer is not available in the Windows port of libxpm. But XpmCreateImageFromBuffer almost does what we want. */ rc = fn_XpmCreateImageFromBuffer (&hdc, SDATA (buffer), &xpm_image, &xpm_mask, &attrs); #else rc = XpmCreatePixmapFromBuffer (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), SDATA (buffer), &img->pixmap, &img->mask, &attrs); #endif /* HAVE_NTGUI */ } if (rc == XpmSuccess) { #if defined (COLOR_TABLE_SUPPORT) && defined (ALLOC_XPM_COLORS) img->colors = colors_in_color_table (&img->ncolors); #else /* not ALLOC_XPM_COLORS */ int i; #ifdef HAVE_NTGUI /* W32 XPM uses XImage to wrap what W32 Emacs calls a Pixmap, plus some duplicate attributes. */ if (xpm_image && xpm_image->bitmap) { img->pixmap = xpm_image->bitmap; /* XImageFree in libXpm frees XImage struct without destroying the bitmap, which is what we want. */ fn_XImageFree (xpm_image); } if (xpm_mask && xpm_mask->bitmap) { /* The mask appears to be inverted compared with what we expect. TODO: invert our expectations. See other places where we have to invert bits because our idea of masks is backwards. */ HGDIOBJ old_obj; old_obj = SelectObject (hdc, xpm_mask->bitmap); PatBlt (hdc, 0, 0, xpm_mask->width, xpm_mask->height, DSTINVERT); SelectObject (hdc, old_obj); img->mask = xpm_mask->bitmap; fn_XImageFree (xpm_mask); DeleteDC (hdc); } DeleteDC (hdc); #endif /* HAVE_NTGUI */ /* Remember allocated colors. */ img->ncolors = attrs.nalloc_pixels; img->colors = (unsigned long *) xmalloc (img->ncolors * sizeof *img->colors); for (i = 0; i < attrs.nalloc_pixels; ++i) { img->colors[i] = attrs.alloc_pixels[i]; #ifdef DEBUG_X_COLORS register_color (img->colors[i]); #endif } #endif /* not ALLOC_XPM_COLORS */ img->width = attrs.width; img->height = attrs.height; xassert (img->width > 0 && img->height > 0); /* The call to XpmFreeAttributes below frees attrs.alloc_pixels. */ #ifdef HAVE_NTGUI fn_XpmFreeAttributes (&attrs); #else XpmFreeAttributes (&attrs); #endif /* HAVE_NTGUI */ } else { #ifdef HAVE_NTGUI DeleteDC (hdc); #endif /* HAVE_NTGUI */ switch (rc) { case XpmOpenFailed: image_error ("Error opening XPM file (%s)", img->spec, Qnil); break; case XpmFileInvalid: image_error ("Invalid XPM file (%s)", img->spec, Qnil); break; case XpmNoMemory: image_error ("Out of memory (%s)", img->spec, Qnil); break; case XpmColorFailed: image_error ("Color allocation error (%s)", img->spec, Qnil); break; default: image_error ("Unknown error (%s)", img->spec, Qnil); break; } } #ifdef ALLOC_XPM_COLORS xpm_free_color_cache (); #endif return rc == XpmSuccess; } #endif /* HAVE_XPM */ #ifdef MAC_OS /* XPM support functions for Mac OS where libxpm is not available. Only XPM version 3 (without any extensions) is supported. */ static int xpm_scan P_ ((const unsigned char **, const unsigned char *, const unsigned char **, int *)); static Lisp_Object xpm_make_color_table_v P_ ((void (**) (Lisp_Object, const unsigned char *, int, Lisp_Object), Lisp_Object (**) (Lisp_Object, const unsigned char *, int))); static void xpm_put_color_table_v P_ ((Lisp_Object, const unsigned char *, int, Lisp_Object)); static Lisp_Object xpm_get_color_table_v P_ ((Lisp_Object, const unsigned char *, int)); static Lisp_Object xpm_make_color_table_h P_ ((void (**) (Lisp_Object, const unsigned char *, int, Lisp_Object), Lisp_Object (**) (Lisp_Object, const unsigned char *, int))); static void xpm_put_color_table_h P_ ((Lisp_Object, const unsigned char *, int, Lisp_Object)); static Lisp_Object xpm_get_color_table_h P_ ((Lisp_Object, const unsigned char *, int)); static int xpm_str_to_color_key P_ ((const char *)); static int xpm_load_image P_ ((struct frame *, struct image *, const unsigned char *, const unsigned char *)); /* Tokens returned from xpm_scan. */ enum xpm_token { XPM_TK_IDENT = 256, XPM_TK_STRING, XPM_TK_EOF }; /* Scan an XPM data and return a character (< 256) or a token defined by enum xpm_token above. *S and END are the start (inclusive) and the end (exclusive) addresses of the data, respectively. Advance *S while scanning. If token is either XPM_TK_IDENT or XPM_TK_STRING, *BEG and *LEN are set to the start address and the length of the corresponding token, respectively. */ static int xpm_scan (s, end, beg, len) const unsigned char **s, *end, **beg; int *len; { int c; while (*s < end) { /* Skip white-space. */ while (*s < end && (c = *(*s)++, isspace (c))) ; /* gnus-pointer.xpm uses '-' in its identifier. sb-dir-plus.xpm uses '+' in its identifier. */ if (isalpha (c) || c == '_' || c == '-' || c == '+') { *beg = *s - 1; while (*s < end && (c = **s, isalnum (c) || c == '_' || c == '-' || c == '+')) ++*s; *len = *s - *beg; return XPM_TK_IDENT; } else if (c == '"') { *beg = *s; while (*s < end && **s != '"') ++*s; *len = *s - *beg; if (*s < end) ++*s; return XPM_TK_STRING; } else if (c == '/') { if (*s < end && **s == '*') { /* C-style comment. */ ++*s; do { while (*s < end && *(*s)++ != '*') ; } while (*s < end && **s != '/'); if (*s < end) ++*s; } else return c; } else return c; } return XPM_TK_EOF; } /* Functions for color table lookup in XPM data. A key is a string specifying the color of each pixel in XPM data. A value is either an integer that specifies a pixel color, Qt that specifies transparency, or Qnil for the unspecified color. If the length of the key string is one, a vector is used as a table. Otherwise, a hash table is used. */ static Lisp_Object xpm_make_color_table_v (put_func, get_func) void (**put_func) (Lisp_Object, const unsigned char *, int, Lisp_Object); Lisp_Object (**get_func) (Lisp_Object, const unsigned char *, int); { *put_func = xpm_put_color_table_v; *get_func = xpm_get_color_table_v; return Fmake_vector (make_number (256), Qnil); } static void xpm_put_color_table_v (color_table, chars_start, chars_len, color) Lisp_Object color_table; const unsigned char *chars_start; int chars_len; Lisp_Object color; { XVECTOR (color_table)->contents[*chars_start] = color; } static Lisp_Object xpm_get_color_table_v (color_table, chars_start, chars_len) Lisp_Object color_table; const unsigned char *chars_start; int chars_len; { return XVECTOR (color_table)->contents[*chars_start]; } static Lisp_Object xpm_make_color_table_h (put_func, get_func) void (**put_func) (Lisp_Object, const unsigned char *, int, Lisp_Object); Lisp_Object (**get_func) (Lisp_Object, const unsigned char *, int); { *put_func = xpm_put_color_table_h; *get_func = xpm_get_color_table_h; return make_hash_table (Qequal, make_number (DEFAULT_HASH_SIZE), make_float (DEFAULT_REHASH_SIZE), make_float (DEFAULT_REHASH_THRESHOLD), Qnil, Qnil, Qnil); } static void xpm_put_color_table_h (color_table, chars_start, chars_len, color) Lisp_Object color_table; const unsigned char *chars_start; int chars_len; Lisp_Object color; { struct Lisp_Hash_Table *table = XHASH_TABLE (color_table); unsigned hash_code; Lisp_Object chars = make_unibyte_string (chars_start, chars_len); hash_lookup (table, chars, &hash_code); hash_put (table, chars, color, hash_code); } static Lisp_Object xpm_get_color_table_h (color_table, chars_start, chars_len) Lisp_Object color_table; const unsigned char *chars_start; int chars_len; { struct Lisp_Hash_Table *table = XHASH_TABLE (color_table); int i = hash_lookup (table, make_unibyte_string (chars_start, chars_len), NULL); return i >= 0 ? HASH_VALUE (table, i) : Qnil; } enum xpm_color_key { XPM_COLOR_KEY_S, XPM_COLOR_KEY_M, XPM_COLOR_KEY_G4, XPM_COLOR_KEY_G, XPM_COLOR_KEY_C }; static const char xpm_color_key_strings[][4] = {"s", "m", "g4", "g", "c"}; static int xpm_str_to_color_key (s) const char *s; { int i; for (i = 0; i < sizeof xpm_color_key_strings / sizeof xpm_color_key_strings[0]; i++) if (strcmp (xpm_color_key_strings[i], s) == 0) return i; return -1; } static int xpm_load_image (f, img, contents, end) struct frame *f; struct image *img; const unsigned char *contents, *end; { const unsigned char *s = contents, *beg, *str; unsigned char buffer[BUFSIZ]; int width, height, x, y; int num_colors, chars_per_pixel; int len, LA1; void (*put_color_table) (Lisp_Object, const unsigned char *, int, Lisp_Object); Lisp_Object (*get_color_table) (Lisp_Object, const unsigned char *, int); Lisp_Object frame, color_symbols, color_table; int best_key, have_mask = 0; XImagePtr ximg = NULL, mask_img = NULL; #define match() \ LA1 = xpm_scan (&s, end, &beg, &len) #define expect(TOKEN) \ if (LA1 != (TOKEN)) \ goto failure; \ else \ match () #define expect_ident(IDENT) \ if (LA1 == XPM_TK_IDENT \ && strlen ((IDENT)) == len && memcmp ((IDENT), beg, len) == 0) \ match (); \ else \ goto failure if (!(end - s >= 9 && memcmp (s, "/* XPM */", 9) == 0)) goto failure; s += 9; match(); expect_ident ("static"); expect_ident ("char"); expect ('*'); expect (XPM_TK_IDENT); expect ('['); expect (']'); expect ('='); expect ('{'); expect (XPM_TK_STRING); if (len >= BUFSIZ) goto failure; memcpy (buffer, beg, len); buffer[len] = '\0'; if (sscanf (buffer, "%d %d %d %d", &width, &height, &num_colors, &chars_per_pixel) != 4 || width <= 0 || height <= 0 || num_colors <= 0 || chars_per_pixel <= 0) goto failure; if (!check_image_size (f, width, height)) { image_error ("Invalid image size", Qnil, Qnil); goto failure; } expect (','); XSETFRAME (frame, f); if (!NILP (Fxw_display_color_p (frame))) best_key = XPM_COLOR_KEY_C; else if (!NILP (Fx_display_grayscale_p (frame))) best_key = (XFASTINT (Fx_display_planes (frame)) > 2 ? XPM_COLOR_KEY_G : XPM_COLOR_KEY_G4); else best_key = XPM_COLOR_KEY_M; color_symbols = image_spec_value (img->spec, QCcolor_symbols, NULL); if (chars_per_pixel == 1) color_table = xpm_make_color_table_v (&put_color_table, &get_color_table); else color_table = xpm_make_color_table_h (&put_color_table, &get_color_table); while (num_colors-- > 0) { unsigned char *color, *max_color; int key, next_key, max_key = 0; Lisp_Object symbol_color = Qnil, color_val; XColor cdef; expect (XPM_TK_STRING); if (len <= chars_per_pixel || len >= BUFSIZ + chars_per_pixel) goto failure; memcpy (buffer, beg + chars_per_pixel, len - chars_per_pixel); buffer[len - chars_per_pixel] = '\0'; str = strtok (buffer, " \t"); if (str == NULL) goto failure; key = xpm_str_to_color_key (str); if (key < 0) goto failure; do { color = strtok (NULL, " \t"); if (color == NULL) goto failure; while ((str = strtok (NULL, " \t")) != NULL) { next_key = xpm_str_to_color_key (str); if (next_key >= 0) break; color[strlen (color)] = ' '; } if (key == XPM_COLOR_KEY_S) { if (NILP (symbol_color)) symbol_color = build_string (color); } else if (max_key < key && key <= best_key) { max_key = key; max_color = color; } key = next_key; } while (str); color_val = Qnil; if (!NILP (color_symbols) && !NILP (symbol_color)) { Lisp_Object specified_color = Fassoc (symbol_color, color_symbols); if (CONSP (specified_color) && STRINGP (XCDR (specified_color))) { if (xstricmp (SDATA (XCDR (specified_color)), "None") == 0) color_val = Qt; else if (x_defined_color (f, SDATA (XCDR (specified_color)), &cdef, 0)) color_val = make_number (cdef.pixel); } } if (NILP (color_val) && max_key > 0) { if (xstricmp (max_color, "None") == 0) color_val = Qt; else if (x_defined_color (f, max_color, &cdef, 0)) color_val = make_number (cdef.pixel); } if (!NILP (color_val)) (*put_color_table) (color_table, beg, chars_per_pixel, color_val); expect (','); } if (!x_create_x_image_and_pixmap (f, width, height, 0, &ximg, &img->pixmap) || !x_create_x_image_and_pixmap (f, width, height, 1, &mask_img, &img->mask)) { image_error ("Out of memory (%s)", img->spec, Qnil); goto error; } for (y = 0; y < height; y++) { expect (XPM_TK_STRING); str = beg; if (len < width * chars_per_pixel) goto failure; for (x = 0; x < width; x++, str += chars_per_pixel) { Lisp_Object color_val = (*get_color_table) (color_table, str, chars_per_pixel); XPutPixel (ximg, x, y, (INTEGERP (color_val) ? XINT (color_val) : FRAME_FOREGROUND_PIXEL (f))); XPutPixel (mask_img, x, y, (!EQ (color_val, Qt) ? PIX_MASK_DRAW : (have_mask = 1, PIX_MASK_RETAIN))); } if (y + 1 < height) expect (','); } img->width = width; img->height = height; /* Maybe fill in the background field while we have ximg handy. */ if (NILP (image_spec_value (img->spec, QCbackground, NULL))) IMAGE_BACKGROUND (img, f, ximg); x_put_x_image (f, ximg, img->pixmap, width, height); x_destroy_x_image (ximg); if (have_mask) { /* Fill in the background_transparent field while we have the mask handy. */ image_background_transparent (img, f, mask_img); x_put_x_image (f, mask_img, img->mask, width, height); x_destroy_x_image (mask_img); } else { x_destroy_x_image (mask_img); Free_Pixmap (FRAME_X_DISPLAY (f), img->mask); img->mask = NO_PIXMAP; } return 1; failure: image_error ("Invalid XPM file (%s)", img->spec, Qnil); error: x_destroy_x_image (ximg); x_destroy_x_image (mask_img); x_clear_image (f, img); return 0; #undef match #undef expect #undef expect_ident } static int xpm_load (f, img) struct frame *f; struct image *img; { int success_p = 0; Lisp_Object file_name; /* If IMG->spec specifies a file name, create a non-file spec from it. */ file_name = image_spec_value (img->spec, QCfile, NULL); if (STRINGP (file_name)) { Lisp_Object file; unsigned char *contents; int size; struct gcpro gcpro1; file = x_find_image_file (file_name); GCPRO1 (file); if (!STRINGP (file)) { image_error ("Cannot find image file `%s'", file_name, Qnil); UNGCPRO; return 0; } contents = slurp_file (SDATA (file), &size); if (contents == NULL) { image_error ("Error loading XPM image `%s'", img->spec, Qnil); UNGCPRO; return 0; } success_p = xpm_load_image (f, img, contents, contents + size); xfree (contents); UNGCPRO; } else { Lisp_Object data; data = image_spec_value (img->spec, QCdata, NULL); success_p = xpm_load_image (f, img, SDATA (data), SDATA (data) + SBYTES (data)); } return success_p; } #endif /* MAC_OS */ /*********************************************************************** Color table ***********************************************************************/ #ifdef COLOR_TABLE_SUPPORT /* An entry in the color table mapping an RGB color to a pixel color. */ struct ct_color { int r, g, b; unsigned long pixel; /* Next in color table collision list. */ struct ct_color *next; }; /* The bucket vector size to use. Must be prime. */ #define CT_SIZE 101 /* Value is a hash of the RGB color given by R, G, and B. */ #define CT_HASH_RGB(R, G, B) (((R) << 16) ^ ((G) << 8) ^ (B)) /* The color hash table. */ struct ct_color **ct_table; /* Number of entries in the color table. */ int ct_colors_allocated; /* Initialize the color table. */ static void init_color_table () { int size = CT_SIZE * sizeof (*ct_table); ct_table = (struct ct_color **) xmalloc (size); bzero (ct_table, size); ct_colors_allocated = 0; } /* Free memory associated with the color table. */ static void free_color_table () { int i; struct ct_color *p, *next; for (i = 0; i < CT_SIZE; ++i) for (p = ct_table[i]; p; p = next) { next = p->next; xfree (p); } xfree (ct_table); ct_table = NULL; } /* Value is a pixel color for RGB color R, G, B on frame F. If an entry for that color already is in the color table, return the pixel color of that entry. Otherwise, allocate a new color for R, G, B, and make an entry in the color table. */ static unsigned long lookup_rgb_color (f, r, g, b) struct frame *f; int r, g, b; { unsigned hash = CT_HASH_RGB (r, g, b); int i = hash % CT_SIZE; struct ct_color *p; Display_Info *dpyinfo; /* Handle TrueColor visuals specially, which improves performance by two orders of magnitude. Freeing colors on TrueColor visuals is a nop, and pixel colors specify RGB values directly. See also the Xlib spec, chapter 3.1. */ dpyinfo = FRAME_X_DISPLAY_INFO (f); if (dpyinfo->red_bits > 0) { unsigned long pr, pg, pb; /* Apply gamma-correction like normal color allocation does. */ if (f->gamma) { XColor color; color.red = r, color.green = g, color.blue = b; gamma_correct (f, &color); r = color.red, g = color.green, b = color.blue; } /* Scale down RGB values to the visual's bits per RGB, and shift them to the right position in the pixel color. Note that the original RGB values are 16-bit values, as usual in X. */ pr = (r >> (16 - dpyinfo->red_bits)) << dpyinfo->red_offset; pg = (g >> (16 - dpyinfo->green_bits)) << dpyinfo->green_offset; pb = (b >> (16 - dpyinfo->blue_bits)) << dpyinfo->blue_offset; /* Assemble the pixel color. */ return pr | pg | pb; } for (p = ct_table[i]; p; p = p->next) if (p->r == r && p->g == g && p->b == b) break; if (p == NULL) { #ifdef HAVE_X_WINDOWS XColor color; Colormap cmap; int rc; color.red = r; color.green = g; color.blue = b; cmap = FRAME_X_COLORMAP (f); rc = x_alloc_nearest_color (f, cmap, &color); if (rc) { ++ct_colors_allocated; p = (struct ct_color *) xmalloc (sizeof *p); p->r = r; p->g = g; p->b = b; p->pixel = color.pixel; p->next = ct_table[i]; ct_table[i] = p; } else return FRAME_FOREGROUND_PIXEL (f); #else COLORREF color; #ifdef HAVE_NTGUI color = PALETTERGB (r, g, b); #else color = RGB_TO_ULONG (r, g, b); #endif /* HAVE_NTGUI */ ++ct_colors_allocated; p = (struct ct_color *) xmalloc (sizeof *p); p->r = r; p->g = g; p->b = b; p->pixel = color; p->next = ct_table[i]; ct_table[i] = p; #endif /* HAVE_X_WINDOWS */ } return p->pixel; } /* Look up pixel color PIXEL which is used on frame F in the color table. If not already present, allocate it. Value is PIXEL. */ static unsigned long lookup_pixel_color (f, pixel) struct frame *f; unsigned long pixel; { int i = pixel % CT_SIZE; struct ct_color *p; for (p = ct_table[i]; p; p = p->next) if (p->pixel == pixel) break; if (p == NULL) { XColor color; Colormap cmap; int rc; #ifdef HAVE_X_WINDOWS cmap = FRAME_X_COLORMAP (f); color.pixel = pixel; x_query_color (f, &color); rc = x_alloc_nearest_color (f, cmap, &color); #else BLOCK_INPUT; cmap = DefaultColormapOfScreen (FRAME_X_SCREEN (f)); color.pixel = pixel; XQueryColor (NULL, cmap, &color); rc = x_alloc_nearest_color (f, cmap, &color); UNBLOCK_INPUT; #endif /* HAVE_X_WINDOWS */ if (rc) { ++ct_colors_allocated; p = (struct ct_color *) xmalloc (sizeof *p); p->r = color.red; p->g = color.green; p->b = color.blue; p->pixel = pixel; p->next = ct_table[i]; ct_table[i] = p; } else return FRAME_FOREGROUND_PIXEL (f); } return p->pixel; } /* Value is a vector of all pixel colors contained in the color table, allocated via xmalloc. Set *N to the number of colors. */ static unsigned long * colors_in_color_table (n) int *n; { int i, j; struct ct_color *p; unsigned long *colors; if (ct_colors_allocated == 0) { *n = 0; colors = NULL; } else { colors = (unsigned long *) xmalloc (ct_colors_allocated * sizeof *colors); *n = ct_colors_allocated; for (i = j = 0; i < CT_SIZE; ++i) for (p = ct_table[i]; p; p = p->next) colors[j++] = p->pixel; } return colors; } #else /* COLOR_TABLE_SUPPORT */ static unsigned long lookup_rgb_color (f, r, g, b) struct frame *f; int r, g, b; { unsigned long pixel; #ifdef MAC_OS pixel = RGB_TO_ULONG (r >> 8, g >> 8, b >> 8); gamma_correct (f, &pixel); #endif /* MAC_OS */ #ifdef HAVE_NTGUI pixel = PALETTERGB (r >> 8, g >> 8, b >> 8); #endif /* HAVE_NTGUI */ return pixel; } static void init_color_table () { } #endif /* COLOR_TABLE_SUPPORT */ #endif /* not MEADOW */ /*********************************************************************** Algorithms ***********************************************************************/ static XColor *x_to_xcolors P_ ((struct frame *, struct image *, int)); static void x_from_xcolors P_ ((struct frame *, struct image *, XColor *)); static void x_detect_edges P_ ((struct frame *, struct image *, int[9], int)); #ifdef HAVE_NTGUI #ifndef MEADOW static void XPutPixel (XImagePtr , int, int, COLORREF); #endif /* not MEADOW */ #endif /* HAVE_NTGUI */ /* Non-zero means draw a cross on images having `:conversion disabled'. */ int cross_disabled_images; /* Edge detection matrices for different edge-detection strategies. */ static int emboss_matrix[9] = { /* x - 1 x x + 1 */ 2, -1, 0, /* y - 1 */ -1, 0, 1, /* y */ 0, 1, -2 /* y + 1 */ }; static int laplace_matrix[9] = { /* x - 1 x x + 1 */ 1, 0, 0, /* y - 1 */ 0, 0, 0, /* y */ 0, 0, -1 /* y + 1 */ }; /* Value is the intensity of the color whose red/green/blue values are R, G, and B. */ #define COLOR_INTENSITY(R, G, B) ((2 * (R) + 3 * (G) + (B)) / 6) #ifndef MEADOW /* On frame F, return an array of XColor structures describing image IMG->pixmap. Each XColor structure has its pixel color set. RGB_P non-zero means also fill the red/green/blue members of the XColor structures. Value is a pointer to the array of XColors structures, allocated with xmalloc; it must be freed by the caller. */ static XColor * x_to_xcolors (f, img, rgb_p) struct frame *f; struct image *img; int rgb_p; { int x, y; XColor *colors, *p; XImagePtr_or_DC ximg; #ifdef HAVE_NTGUI HDC hdc; HGDIOBJ prev; #endif /* HAVE_NTGUI */ colors = (XColor *) xmalloc (img->width * img->height * sizeof *colors); #ifndef HAVE_NTGUI /* Get the X image IMG->pixmap. */ ximg = XGetImage (FRAME_X_DISPLAY (f), img->pixmap, 0, 0, img->width, img->height, ~0, ZPixmap); #else /* Load the image into a memory device context. */ hdc = get_frame_dc (f); ximg = CreateCompatibleDC (hdc); release_frame_dc (f, hdc); prev = SelectObject (ximg, img->pixmap); #endif /* HAVE_NTGUI */ /* Fill the `pixel' members of the XColor array. I wished there were an easy and portable way to circumvent XGetPixel. */ p = colors; for (y = 0; y < img->height; ++y) { XColor *row = p; #ifdef HAVE_X_WINDOWS for (x = 0; x < img->width; ++x, ++p) p->pixel = XGetPixel (ximg, x, y); if (rgb_p) x_query_colors (f, row, img->width); #else for (x = 0; x < img->width; ++x, ++p) { /* W32_TODO: palette support needed here? */ p->pixel = GET_PIXEL (ximg, x, y); if (rgb_p) { #ifdef MAC_OS p->red = RED16_FROM_ULONG (p->pixel); p->green = GREEN16_FROM_ULONG (p->pixel); p->blue = BLUE16_FROM_ULONG (p->pixel); #endif /* MAC_OS */ #ifdef HAVE_NTGUI p->red = 256 * GetRValue (p->pixel); p->green = 256 * GetGValue (p->pixel); p->blue = 256 * GetBValue (p->pixel); #endif /* HAVE_NTGUI */ } } #endif /* HAVE_X_WINDOWS */ } Destroy_Image (ximg, prev); return colors; } #ifdef HAVE_NTGUI /* Put a pixel of COLOR at position X, Y in XIMG. XIMG must have been created with CreateDIBSection, with the pointer to the bit values stored in ximg->data. */ static void XPutPixel (ximg, x, y, color) XImagePtr ximg; int x, y; COLORREF color; { int width = ximg->info.bmiHeader.biWidth; int height = ximg->info.bmiHeader.biHeight; unsigned char * pixel; /* True color images. */ if (ximg->info.bmiHeader.biBitCount == 24) {