/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* GdkPixbuf library - convert X drawable information to RGB * * Copyright (C) 1999 Michael Zucchi * * Authors: Michael Zucchi * Cody Russell * Federico Mena-Quintero * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. */ /* Ported to Xlib by John Harper */ #include #include #include #include "gdk-pixbuf-xlib-private.h" #include #include #if (KSVG_BYTE_ORDER == KSVG_LITTLE_ENDIAN) #define LITTLE #endif #define d(x) static unsigned int mask_table[] = { 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff, 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff, 0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff, 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff, 0xffffffff }; /* color handling */ typedef struct xlib_colormap_struct xlib_colormap; struct xlib_colormap_struct { int size; XColor *colors; Visual *visual; Colormap colormap; }; /* from gdkvisual.c */ static void visual_decompose_mask (unsigned long mask, int *shift, int *prec) { *shift = 0; *prec = 0; while (!(mask & 0x1)) { (*shift)++; mask >>= 1; } while (mask & 0x1) { (*prec)++; mask >>= 1; } } static int x_error; static int handle_x_error (Display *dpy, XErrorEvent *ev) { x_error = 1; return 0; } static int drawable_is_pixmap (Drawable d) { /* copied from Imlib */ XErrorHandler errh; XWindowAttributes wa; int is_pixmap; errh = XSetErrorHandler (handle_x_error); x_error = 0; XGetWindowAttributes (gdk_pixbuf_dpy, d, &wa); XSync (gdk_pixbuf_dpy, False); is_pixmap = x_error; XSetErrorHandler (errh); return is_pixmap; } /* convert 1 bits-pixel data no alpha */ static void rgb1 (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned char *s; unsigned char data; unsigned char *o; unsigned char *srow = image->data, *orow = pixels; d (printf ("1 bits/pixel\n")); /* convert upto 8 pixels/time */ /* its probably not worth trying to make this run very fast, who uses 1 bit displays anymore? */ width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx ++) { data = srow[xx >> 3] >> (7 - (xx & 7)) & 1; *o++ = colormap->colors[data].red; *o++ = colormap->colors[data].green; *o++ = colormap->colors[data].blue; } srow += bpl; orow += rowstride; } } /* convert 1 bits/pixel data with alpha */ static void rgb1a (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned char *s; unsigned char data; unsigned char *o; unsigned char *srow = image->data, *orow = pixels; unsigned int remap[2]; d (printf ("1 bits/pixel\n")); /* convert upto 8 pixels/time */ /* its probably not worth trying to make this run very fast, who uses 1 bit displays anymore? */ width = image->width; height = image->height; bpl = image->bytes_per_line; for (xx = 0; xx < 2; xx++) { #ifdef LITTLE remap[xx] = 0xff000000 | colormap->colors[xx].blue << 16 | colormap->colors[xx].green << 8 | colormap->colors[xx].red; #else remap[xx] = 0xff | colormap->colors[xx].red << 24 | colormap->colors[xx].green << 16 | colormap->colors[xx].blue << 8; #endif } for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx ++) { data = srow[xx >> 3] >> (7 - (xx & 7)) & 1; *o++ = remap[data]; } srow += bpl; orow += rowstride; } } /* convert 8 bits/pixel data no alpha */ static void rgb8 (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned int mask; unsigned int data; unsigned char *srow = image->data, *orow = pixels; unsigned char *s; unsigned char *o; width = image->width; height = image->height; bpl = image->bytes_per_line; d (printf ("8 bit, no alpha output\n")); mask = mask_table[image->depth]; for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx++) { data = *s++ & mask; *o++ = colormap->colors[data].red; *o++ = colormap->colors[data].green; *o++ = colormap->colors[data].blue; } srow += bpl; orow += rowstride; } } /* convert 8 bits/pixel data with alpha */ static void rgb8a (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned int mask; unsigned int data; unsigned int remap[256]; unsigned char *s; /* read 2 pixels at once */ unsigned int *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; d (printf ("8 bit, with alpha output\n")); mask = mask_table[image->depth]; for (xx = 0; xx < colormap->size; xx++) { #ifdef LITTLE remap[xx] = 0xff000000 | colormap->colors[xx].blue << 16 | colormap->colors[xx].green << 8 | colormap->colors[xx].red; #else remap[xx] = 0xff | colormap->colors[xx].red << 24 | colormap->colors[xx].green << 16 | colormap->colors[xx].blue << 8; #endif } for (yy = 0; yy < height; yy++) { s = srow; o = (unsigned int *) orow; for (xx = 0; xx < width; xx ++) { data = *s++ & mask; *o++ = remap[data]; } srow += bpl; orow += rowstride; } } /* convert 16 bits/pixel data no alpha data in lsb format */ static void rgb565lsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned int *s; /* read 2 pixels at once */ #else unsigned char *s; /* read 2 pixels at once */ #endif unsigned short *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = (unsigned int *) srow; #else s = srow; #endif o = (unsigned short *) orow; for (xx = 1; xx < width; xx += 2) { unsigned int data; #ifdef LITTLE data = *s++; *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13 | (data & 0x7e0) << 5 | (data & 0x600) >> 1; *o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2 | (data & 0xf8000000) >> 16 | (data & 0xe0000000) >> 21; *o++ = (data & 0x7e00000) >> 19 | (data & 0x6000000) >> 25 | (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10; #else /* swap endianness first */ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24; s += 4; *o++ = (data & 0xf800) | (data & 0xe000) >> 5 | (data & 0x7e0) >> 3 | (data & 0x600) >> 9; *o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6 | (data & 0xf8000000) >> 24 | (data & 0xe0000000) >> 29; *o++ = (data & 0x7e00000) >> 11 | (data & 0x6000000) >> 17 | (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18; #endif } /* check for last remaining pixel */ if (width & 1) { unsigned short data; #ifdef LITTLE data = *((short *) s); #else data = *((short *) s); data = ((data >> 8) & 0xff) | ((data & 0xff) << 8); #endif ((char *) o)[0] = ((data >> 8) & 0xf8) | ((data >> 13) & 0x7); ((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3); ((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7); } srow += bpl; orow += rowstride; } } /* convert 16 bits/pixel data no alpha data in msb format */ static void rgb565msb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned char *s; /* need to swap data order */ #else unsigned int *s; /* read 2 pixels at once */ #endif unsigned short *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = srow; #else s = (unsigned int *) srow; #endif o = (unsigned short *) orow; for (xx = 1; xx < width; xx += 2) { unsigned int data; #ifdef LITTLE /* swap endianness first */ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24; s += 4; *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13 | (data & 0x7e0) << 5 | (data & 0x600) >> 1; *o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2 | (data & 0xf8000000) >> 16 | (data & 0xe0000000) >> 21; *o++ = (data & 0x7e00000) >> 19 | (data & 0x6000000) >> 25 | (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10; #else data = *s++; *o++ = (data & 0xf800) | (data & 0xe000) >> 5 | (data & 0x7e0) >> 3 | (data & 0x600) >> 9; *o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6 | (data & 0xf8000000) >> 24 | (data & 0xe0000000) >> 29; *o++ = (data & 0x7e00000) >> 11 | (data & 0x6000000) >> 17 | (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18; #endif } /* check for last remaining pixel */ if (width & 1) { unsigned short data; #ifdef LITTLE data = *((short *) s); data = ((data >> 8) & 0xff) | ((data & 0xff) << 8); #else data = *((short *) s); #endif ((char *) o)[0] = ((data >> 8) & 0xf8) | ((data >> 13) & 0x7); ((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3); ((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7); } srow += bpl; orow += rowstride; } } /* convert 16 bits/pixel data with alpha data in lsb format */ static void rgb565alsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned short *s; /* read 1 pixels at once */ #else unsigned char *s; #endif unsigned int *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = (unsigned short *) srow; #else s = (unsigned char *) srow; #endif o = (unsigned int *) orow; for (xx = 0; xx < width; xx ++) { unsigned int data; /* rrrrrggg gggbbbbb -> rrrrrRRR ggggggGG bbbbbBBB aaaaaaaa */ /* little endian: aaaaaaaa bbbbbBBB ggggggGG rrrrrRRR */ #ifdef LITTLE data = *s++; *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13 | (data & 0x7e0) << 5 | (data & 0x600) >> 1 | (data & 0x1f) << 19 | (data & 0x1c) << 14 | 0xff000000; #else /* swap endianness first */ data = s[0] | s[1] << 8; s += 2; *o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11 | (data & 0x7e0) << 13 | (data & 0x600) << 7 | (data & 0x1f) << 11 | (data & 0x1c) << 6 | 0xff; #endif } srow += bpl; orow += rowstride; } } /* convert 16 bits/pixel data with alpha data in msb format */ static void rgb565amsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned char *s; #else unsigned short *s; /* read 1 pixels at once */ #endif unsigned int *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { s = srow; o = (unsigned int *) orow; for (xx = 0; xx < width; xx ++) { unsigned int data; /* rrrrrggg gggbbbbb -> rrrrrRRR gggggg00 bbbbbBBB aaaaaaaa */ /* little endian: aaaaaaaa bbbbbBBB gggggg00 rrrrrRRR */ #ifdef LITTLE /* swap endianness first */ data = s[0] | s[1] << 8; s += 2; *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13 | (data & 0x7e0) << 5 | (data & 0x600) >> 1 | (data & 0x1f) << 19 | (data & 0x1c) << 14 | 0xff000000; #else data = *s++; *o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11 | (data & 0x7e0) << 13 | (data & 0x600) << 7 | (data & 0x1f) << 11 | (data & 0x1c) << 6 | 0xff; #endif } srow += bpl; orow += rowstride; } } /* convert 15 bits/pixel data no alpha data in lsb format */ static void rgb555lsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned int *s; /* read 2 pixels at once */ #else unsigned char *s; /* read 2 pixels at once */ #endif unsigned short *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = (unsigned int *) srow; #else s = srow; #endif o = (unsigned short *) orow; for (xx = 1; xx < width; xx += 2) { unsigned int data; #ifdef LITTLE data = *s++; *o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12 | (data & 0x3e0) << 6 | (data & 0x380) << 1; *o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2 | (data & 0x7c000000) >> 15 | (data & 0x70000000) >> 20; *o++ = (data & 0x3e00000) >> 18 | (data & 0x3800000) >> 23 | (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10; #else /* swap endianness first */ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24; s += 4; *o++ = (data & 0x7c00) << 1 | (data & 0x7000) >> 4 | (data & 0x3e0) >> 2 | (data & 0x380) >> 7; *o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6 | (data & 0x7c000000) >> 23 | (data & 0x70000000) >> 28; *o++ = (data & 0x3e00000) >> 10 | (data & 0x3800000) >> 15 | (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18; #endif } /* check for last remaining pixel */ if (width & 1) { unsigned short data; #ifdef LITTLE data = *((short *) s); #else data = *((short *) s); data = ((data >> 8) & 0xff) | ((data & 0xff) << 8); #endif ((char *) o)[0] = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12; ((char *) o)[1] = (data & 0x3e0) >> 2 | (data & 0x380) >> 7; ((char *) o)[2] = (data & 0x1f) << 3 | (data & 0x1c) >> 2; } srow += bpl; orow += rowstride; } } /* convert 15 bits/pixel data no alpha data in msb format */ static void rgb555msb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned char *s; /* read 2 pixels at once */ #else unsigned int *s; /* read 2 pixels at once */ #endif unsigned short *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { s = srow; o = (unsigned short *) orow; for (xx = 1; xx < width; xx += 2) { unsigned int data; #ifdef LITTLE /* swap endianness first */ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24; s += 4; *o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12 | (data & 0x3e0) << 6 | (data & 0x380) << 1; *o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2 | (data & 0x7c000000) >> 15 | (data & 0x70000000) >> 20; *o++ = (data & 0x3e00000) >> 18 | (data & 0x3800000) >> 23 | (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10; #else data = *s++; *o++ = (data & 0x7c00) << 1 | (data & 0x7000) >> 4 | (data & 0x3e0) >> 2 | (data & 0x380) >> 7; *o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6 | (data & 0x7c000000) >> 23 | (data & 0x70000000) >> 28; *o++ = (data & 0x3e00000) >> 10 | (data & 0x3800000) >> 15 | (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18; #endif } /* check for last remaining pixel */ if (width & 1) { unsigned short data; #ifdef LITTLE data = *((short *) s); data = ((data >> 8) & 0xff) | ((data & 0xff) << 8); #else data = *((short *) s); #endif ((char *) o)[0] = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12; ((char *) o)[1] = (data & 0x3e0) >> 2 | (data & 0x380) >> 7; ((char *) o)[2] = (data & 0x1f) << 3 | (data & 0x1c) >> 2; } srow += bpl; orow += rowstride; } } /* convert 15 bits/pixel data with alpha data in lsb format */ static void rgb555alsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned short *s; /* read 1 pixels at once */ #else unsigned char *s; #endif unsigned int *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = (unsigned short *) srow; #else s = srow; #endif o = (unsigned int *) orow; for (xx = 0; xx < width; xx++) { unsigned int data; /* rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */ /* little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */ #ifdef LITTLE data = *s++; *o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12 | (data & 0x3e0) << 6 | (data & 0x380) << 1 | (data & 0x1f) << 19 | (data & 0x1c) << 14 | 0xff000000; #else /* swap endianness first */ data = s[0] | s[1] << 8; s += 2; *o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12 | (data & 0x3e0) << 14 | (data & 0x380) << 9 | (data & 0x1f) << 11 | (data & 0x1c) << 6 | 0xff; #endif } srow += bpl; orow += rowstride; } } /* convert 15 bits/pixel data with alpha data in msb format */ static void rgb555amsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; #ifdef LITTLE unsigned short *s; /* read 1 pixels at once */ #else unsigned char *s; #endif unsigned int *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = (unsigned short *) srow; #else s = srow; #endif o = (unsigned int *) orow; for (xx = 0; xx < width; xx++) { unsigned int data; /* rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */ /* little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */ #ifdef LITTLE /* swap endianness first */ data = s[0] | s[1] << 8; s += 2; *o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12 | (data & 0x3e0) << 6 | (data & 0x380) << 1 | (data & 0x1f) << 19 | (data & 0x1c) << 14 | 0xff000000; #else data = *s++; *o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12 | (data & 0x3e0) << 14 | (data & 0x380) << 9 | (data & 0x1f) << 11 | (data & 0x1c) << 6 | 0xff; #endif } srow += bpl; orow += rowstride; } } static void rgb888alsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned char *s; /* for byte order swapping */ unsigned char *o; unsigned char *srow = image->data, *orow = pixels; width = image->width; height = image->height; bpl = image->bytes_per_line; d (printf ("32 bits/pixel with alpha\n")); /* lsb data */ for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx++) { *o++ = s[2]; *o++ = s[1]; *o++ = s[0]; *o++ = 0xff; s += 4; } srow += bpl; orow += rowstride; } } static void rgb888lsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned char *srow = image->data, *orow = pixels; unsigned char *o, *s; width = image->width; height = image->height; bpl = image->bytes_per_line; d (printf ("32 bit, lsb, no alpha\n")); for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx++) { *o++ = s[2]; *o++ = s[1]; *o++ = s[0]; s += 4; } srow += bpl; orow += rowstride; } } static void rgb888amsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned char *srow = image->data, *orow = pixels; #ifdef LITTLE unsigned int *o; unsigned int *s; #else unsigned char *s; /* for byte order swapping */ unsigned char *o; #endif d (printf ("32 bit, msb, with alpha\n")); width = image->width; height = image->height; bpl = image->bytes_per_line; /* msb data */ for (yy = 0; yy < height; yy++) { #ifdef LITTLE s = (unsigned int *) srow; o = (unsigned int *) orow; #else s = srow; o = orow; #endif for (xx = 0; xx < width; xx++) { #ifdef LITTLE *o++ = s[1]; *o++ = s[2]; *o++ = s[3]; *o++ = 0xff; s += 4; #else *o++ = (*s << 8) | 0xff; /* untested */ s++; #endif } srow += bpl; orow += rowstride; } } static void rgb888msb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap) { int xx, yy; int width, height; int bpl; unsigned char *srow = image->data, *orow = pixels; unsigned char *s; unsigned char *o; d (printf ("32 bit, msb, no alpha\n")); width = image->width; height = image->height; bpl = image->bytes_per_line; for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx++) { *o++ = s[1]; *o++ = s[2]; *o++ = s[3]; s += 4; } srow += bpl; orow += rowstride; } } /* This should work correctly with any display/any endianness, but will probably run quite slow */ static void convert_real_slow (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *cmap, int alpha) { int xx, yy; int width, height; int bpl; unsigned char *srow = image->data, *orow = pixels; unsigned char *s; unsigned char *o; unsigned int pixel; Visual *v; unsigned char component; int i; int red_shift, red_prec, green_shift, green_prec, blue_shift, blue_prec; width = image->width; height = image->height; bpl = image->bytes_per_line; v = cmap->visual; visual_decompose_mask (v->red_mask, &red_shift, &red_prec); visual_decompose_mask (v->green_mask, &green_shift, &green_prec); visual_decompose_mask (v->blue_mask, &blue_shift, &blue_prec); d(printf("rgb mask/shift/prec = %x:%x:%x %d:%d:%d %d:%d:%d\n", v->red_mask, v->green_mask, v->blue_mask, red_shift, green_shift, blue_shift, red_prec, green_prec, blue_prec)); for (yy = 0; yy < height; yy++) { s = srow; o = orow; for (xx = 0; xx < width; xx++) { pixel = XGetPixel (image, xx, yy); switch (v->class) { /* I assume this is right for static & greyscale's too? */ case StaticGray: case GrayScale: case StaticColor: case PseudoColor: *o++ = cmap->colors[pixel].red; *o++ = cmap->colors[pixel].green; *o++ = cmap->colors[pixel].blue; break; case TrueColor: /* This is odd because it must sometimes shift left (otherwise I'd just shift >> (*_shift - 8 + *_prec + <0-7>). This logic should work for all bit sizes/shifts/etc. */ component = 0; for (i = 24; i < 32; i += red_prec) component |= ((pixel & v->red_mask) << (32 - red_shift - red_prec)) >> i; *o++ = component; component = 0; for (i = 24; i < 32; i += green_prec) component |= ((pixel & v->green_mask) << (32 - green_shift - green_prec)) >> i; *o++ = component; component = 0; for (i = 24; i < 32; i += blue_prec) component |= ((pixel & v->blue_mask) << (32 - blue_shift - blue_prec)) >> i; *o++ = component; break; case DirectColor: *o++ = cmap->colors[((pixel & v->red_mask) << (32 - red_shift - red_prec)) >> 24].red; *o++ = cmap->colors[((pixel & v->green_mask) << (32 - green_shift - green_prec)) >> 24].green; *o++ = cmap->colors[((pixel & v->blue_mask) << (32 - blue_shift - blue_prec)) >> 24].blue; break; } if (alpha) *o++ = 0xff; } srow += bpl; orow += rowstride; } } typedef void (* cfunc) (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *cmap); static cfunc convert_map[] = { rgb1,rgb1,rgb1a,rgb1a, rgb8,rgb8,rgb8a,rgb8a, rgb555lsb,rgb555msb,rgb555alsb,rgb555amsb, rgb565lsb,rgb565msb,rgb565alsb,rgb565amsb, rgb888lsb,rgb888msb,rgb888alsb,rgb888amsb }; /* perform actual conversion If we can, try and use the optimised code versions, but as a default fallback, and always for direct colour, use the generic/slow but complete conversion function. */ static void rgbconvert (XImage *image, unsigned char *pixels, int rowstride, int alpha, xlib_colormap *cmap) { int index = (image->byte_order == MSBFirst) | (alpha != 0) << 1; int bank=5; /* default fallback converter */ Visual *v = cmap->visual; d(printf("masks = %x:%x:%x\n", v->red_mask, v->green_mask, v->blue_mask)); d(printf("image depth = %d, bpp = %d\n", image->depth, image->bits_per_pixel)); switch (v->class) { /* I assume this is right for static & greyscale's too? */ case StaticGray: case GrayScale: case StaticColor: case PseudoColor: switch (image->bits_per_pixel) { case 1: bank = 0; break; case 8: bank = 1; break; } break; case TrueColor: switch (image->depth) { case 15: if (v->red_mask == 0x7c00 && v->green_mask == 0x3e0 && v->blue_mask == 0x1f && image->bits_per_pixel == 16) bank = 2; break; case 16: if (v->red_mask == 0xf800 && v->green_mask == 0x7e0 && v->blue_mask == 0x1f && image->bits_per_pixel == 16) bank = 3; break; case 24: case 32: if (v->red_mask == 0xff0000 && v->green_mask == 0xff00 && v->blue_mask == 0xff && image->bits_per_pixel == 32) bank = 4; break; } break; case DirectColor: /* always use the slow version */ break; } d(printf("converting using conversion function in bank %d\n", bank)); if (bank==5) { convert_real_slow(image, pixels, rowstride, cmap, alpha); } else { index |= bank << 2; (* convert_map[index]) (image, pixels, rowstride, cmap); } } static int xlib_window_is_viewable (Window w) { XWindowAttributes wa; while (w != 0) { Window parent, root, *children; int nchildren; XGetWindowAttributes (gdk_pixbuf_dpy, w, &wa); if (wa.map_state != IsViewable) return 0; if (!XQueryTree (gdk_pixbuf_dpy, w, &root, &parent, &children, &nchildren)) return 0; if (nchildren > 0) XFree (children); if (parent == root) return 1; w = parent; } return 0; } static int xlib_window_get_origin (Window w, int *x, int *y) { Window child; return XTranslateCoordinates (gdk_pixbuf_dpy, w, RootWindow (gdk_pixbuf_dpy, gdk_pixbuf_screen), 0, 0, x, y, &child); }