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880f5ade6b
1999-12-08 Arjan van de Ven <arjan@fenrus.demon.nl> * gdk-pixbuf/gdk-pixbuf-drawable.c : Fixed the red/green/red bug on two occasions. * gdk-pixbuf/io-ras.c: Changed from the custom be32_to_cpu function to the generic glib one.
1074 lines
25 KiB
C
1074 lines
25 KiB
C
/* GdkPixbuf library - convert X drawable information to RGB
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*
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* Copyright (C) 1999 Michael Zucchi
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*
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* Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
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* Cody Russell <bratsche@dfw.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <string.h>
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#include "gdk-pixbuf.h"
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#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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#define LITTLE
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#endif
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#define d(x)
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static unsigned long mask_table[] = {
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0x00000000, 0x00000001, 0x00000003, 0x00000007,
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0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
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0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
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0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
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0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
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0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
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0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
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0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
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0xffffffff
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};
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/*
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convert 1 bits-pixel data
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no alpha
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*/
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static void
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rgb1 (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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unsigned char *s;
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register unsigned char data;
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unsigned char *o;
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unsigned char *srow = image->mem, *orow = pixels;
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GdkColormap *colormap;
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d (printf ("1 bits/pixel\n"));
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/* convert upto 8 pixels/time */
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/* its probably not worth trying to make this run very fast, who uses
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1 bit displays anymore? */
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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colormap = gdk_rgb_get_cmap ();
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for (yy = 0; yy < height; yy++) {
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s = srow;
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o = orow;
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for (xx = 0; xx < width; xx ++) {
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data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
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*o++ = colormap->colors[data].red;
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*o++ = colormap->colors[data].green;
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*o++ = colormap->colors[data].blue;
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 1 bits/pixel data
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with alpha
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*/
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static void
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rgb1a (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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unsigned char *s;
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register unsigned char data;
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unsigned char *o;
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unsigned char *srow = image->mem, *orow = pixels;
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unsigned long remap[2];
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GdkColormap *colormap;
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d (printf ("1 bits/pixel\n"));
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/* convert upto 8 pixels/time */
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/* its probably not worth trying to make this run very fast, who uses
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1 bit displays anymore? */
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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colormap = gdk_rgb_get_cmap ();
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for (xx = 0; xx < 2; xx++) {
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#ifdef LITTLE
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remap[xx] = 0xff000000
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| colormap->colors[xx].blue << 16
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| colormap->colors[xx].green << 8
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| colormap->colors[xx].red;
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#else
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remap[xx] = 0xff
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| colormap->colors[xx].red << 24
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| colormap->colors[xx].green << 16
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| colormap->colors[xx].blue << 8;
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#endif
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}
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for (yy = 0; yy < height; yy++) {
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s = srow;
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o = orow;
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for (xx = 0; xx < width; xx ++) {
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data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
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*o++ = remap[data];
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 8 bits/pixel data
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no alpha
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*/
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static void
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rgb8 (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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unsigned long mask;
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register unsigned long data;
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unsigned char *srow = image->mem, *orow = pixels;
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register unsigned char *s;
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register unsigned char *o;
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GdkColormap *colormap;
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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d (printf ("8 bit, no alpha output\n"));
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colormap = gdk_rgb_get_cmap ();
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mask = mask_table[image->depth];
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for (yy = 0; yy < height; yy++) {
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s = srow;
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o = orow;
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for (xx = 0; xx < width; xx++) {
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data = *s++ & mask;
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*o++ = colormap->colors[data].red;
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*o++ = colormap->colors[data].green;
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*o++ = colormap->colors[data].blue;
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 8 bits/pixel data
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with alpha
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*/
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static void
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rgb8a (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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unsigned long mask;
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register unsigned long data;
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GdkColormap *colormap;
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unsigned long remap[256];
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register unsigned char *s; /* read 2 pixels at once */
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register unsigned long *o;
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unsigned char *srow = image->mem, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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d (printf ("8 bit, with alpha output\n"));
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colormap = gdk_rgb_get_cmap ();
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mask = mask_table[image->depth];
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for (xx = 0; xx < colormap->size; xx++) {
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#ifdef LITTLE
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remap[xx] = 0xff000000
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| colormap->colors[xx].blue << 16
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| colormap->colors[xx].green << 8
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| colormap->colors[xx].red;
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#else
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remap[xx] = 0xff
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| colormap->colors[xx].red << 24
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| colormap->colors[xx].green << 16
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| colormap->colors[xx].blue << 8;
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#endif
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}
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for (yy = 0; yy < height; yy++) {
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s = srow;
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o = (unsigned long *) orow;
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for (xx = 0; xx < width; xx ++) {
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data = *s++ & mask;
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*o++ = remap[data];
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 16 bits/pixel data
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no alpha
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data in lsb format
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*/
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static void
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rgb565lsb (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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#ifdef LITTLE
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register unsigned long *s; /* read 2 pixels at once */
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#else
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register unsigned char *s; /* read 2 pixels at once */
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#endif
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register unsigned short *o;
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unsigned char *srow = image->mem, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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for (yy = 0; yy < height; yy++) {
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#ifdef LITTLE
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s = (unsigned long *) srow;
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#else
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s = (unsigned char *) srow;
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#endif
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o = (unsigned short *) orow;
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for (xx = 1; xx < width; xx += 2) {
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register unsigned long data;
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#ifdef LITTLE
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data = *s++;
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*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5;
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*o++ = (data & 0x1f) << 3 | (data & 0xf8000000) >> 16;
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*o++ = ((data & 0x7e00000) >> 19) | (data & 0x1f0000) >> 5;
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#else
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/* swap endianness first */
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data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
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s += 4;
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*o++ = (data & 0xf800) | (data & 0x7e0) >> 3;
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*o++ = (data & 0x1f) << 11 | (data & 0xf8000000) >> 24;
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*o++ = ((data & 0x7e00000) >> 11) | (data & 0x1f0000) >> 13;
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#endif
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}
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/* check for last remaining pixel */
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if (width & 1) {
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register unsigned short data;
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#ifdef LITTLE
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data = *((short *) s);
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#else
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data = *((short *) s);
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data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
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#endif
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((char *) o)[0] = (data >> 8) & 0xf8;
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((char *) o)[1] = (data >> 3) & 0xfc;
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((char *) o)[2] = (data << 3) & 0xf8;
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 16 bits/pixel data
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no alpha
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data in msb format
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*/
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static void
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rgb565msb (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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#ifdef LITTLE
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register unsigned char *s; /* need to swap data order */
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#else
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register unsigned long *s; /* read 2 pixels at once */
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#endif
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register unsigned short *o;
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unsigned char *srow = image->mem, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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for (yy = 0; yy < height; yy++) {
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#ifdef LITTLE
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s = srow;
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#else
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s = (unsigned long *) srow;
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#endif
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o = (unsigned short *) orow;
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for (xx = 1; xx < width; xx += 2) {
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register unsigned long data;
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#ifdef LITTLE
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/* swap endianness first */
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data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
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s += 4;
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*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5;
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*o++ = (data & 0x1f) << 3 | (data & 0xf8000000) >> 16;
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*o++ = ((data & 0x7e00000) >> 19) | (data & 0x1f0000) >> 5;
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#else
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data = *s++;
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*o++ = (data & 0xf800) | (data & 0x7e0) >> 3;
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*o++ = (data & 0x1f) << 11 | (data & 0xf8000000) >> 24;
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*o++ = ((data & 0x7e00000) >> 11) | (data & 0x1f0000) >> 13;
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#endif
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}
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/* check for last remaining pixel */
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if (width & 1) {
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register unsigned short data;
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#ifdef LITTLE
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data = *((short *) s);
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data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
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#else
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data = *((short *) s);
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#endif
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((char *) o)[0] = (data >> 8) & 0xf8;
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((char *) o)[1] = (data >> 3) & 0xfc;
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((char *) o)[2] = (data << 3) & 0xf8;
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 16 bits/pixel data
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with alpha
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data in lsb format
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*/
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static void
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rgb565alsb (GdkImage *image, art_u8 *pixels, int rowstride)
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{
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int xx, yy;
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int width, height;
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int bpl;
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|
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#ifdef LITTLE
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register unsigned short *s; /* read 1 pixels at once */
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#else
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register unsigned char *s;
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#endif
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register unsigned long *o;
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unsigned char *srow = image->mem, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bpl;
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for (yy = 0; yy < height; yy++) {
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#ifdef LITTLE
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s = (unsigned short *) srow;
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#else
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s = (unsigned char *) srow;
|
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#endif
|
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o = (unsigned long *) orow;
|
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for (xx = 0; xx < width; xx ++) {
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register unsigned long data;
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/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
|
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/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
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#ifdef LITTLE
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data = *s++;
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*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5
|
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| (data & 0x1f) << 19 | 0xff000000;
|
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#else
|
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/* swap endianness first */
|
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data = s[0] | s[1] << 8;
|
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s += 2;
|
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*o++ = (data & 0xf800) << 16 | (data & 0x7e0) << 13
|
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| (data & 0x1f) << 11 | 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 16 bits/pixel data
|
||
with alpha
|
||
data in msb format
|
||
*/
|
||
static void
|
||
rgb565amsb (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register unsigned char *s;
|
||
#else
|
||
register unsigned short *s; /* read 1 pixels at once */
|
||
#endif
|
||
register unsigned long *o;
|
||
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
s = srow;
|
||
o = (unsigned long *) orow;
|
||
for (xx = 0; xx < width; xx ++) {
|
||
register unsigned long data;
|
||
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
|
||
#ifdef LITTLE
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5
|
||
| (data & 0x1f) << 19 | 0xff000000;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0xf800) << 16 | (data & 0x7e0) << 13
|
||
| (data & 0x1f) << 11 | 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
no alpha
|
||
data in lsb format
|
||
*/
|
||
static void
|
||
rgb555lsb (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register unsigned long *s; /* read 2 pixels at once */
|
||
#else
|
||
register unsigned char *s; /* read 2 pixels at once */
|
||
#endif
|
||
register unsigned short *o;
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (unsigned long *) srow;
|
||
#else
|
||
s = srow;
|
||
#endif
|
||
o = (unsigned short *) orow;
|
||
for (xx = 1; xx < width; xx += 2) {
|
||
register unsigned long data;
|
||
#ifdef LITTLE
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) >> 7 | (data & 0x3e0) << 6;
|
||
*o++ = (data & 0x1f) << 3 | (data & 0x7c000000) >> 15;
|
||
*o++ = ((data & 0x3e00000) >> 18) | (data & 0x1f0000) >> 5;
|
||
#else
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
|
||
s += 4;
|
||
*o++ = (data & 0x7c00) << 1 | (data & 0x3e0) >> 2;
|
||
*o++ = (data & 0x1f) << 11 | (data & 0x7c000000) >> 23;
|
||
*o++ = ((data & 0x3e00000) >> 10) | (data & 0x1f0000) >> 13;
|
||
#endif
|
||
}
|
||
/* check for last remaining pixel */
|
||
if (width & 1) {
|
||
register unsigned short data;
|
||
#ifdef LITTLE
|
||
data = *((short *) s);
|
||
#else
|
||
data = *((short *) s);
|
||
data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
|
||
#endif
|
||
((char *) o)[0] = (data & 0x7c0) >> 7;
|
||
((char *) o)[1] = (data & 0x3e0) >> 2;
|
||
((char *) o)[2] = (data & 0x1f) << 3;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
no alpha
|
||
data in msb format
|
||
*/
|
||
static void
|
||
rgb555msb (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register unsigned char *s; /* read 2 pixels at once */
|
||
#else
|
||
register unsigned long *s; /* read 2 pixels at once */
|
||
#endif
|
||
register unsigned short *o;
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
s = srow;
|
||
o = (unsigned short *) orow;
|
||
for (xx = 1; xx < width; xx += 2) {
|
||
register unsigned long 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 & 0x3e0) << 6;
|
||
*o++ = (data & 0x1f) << 3 | (data & 0x7c000000) >> 15;
|
||
*o++ = ((data & 0x3e00000) >> 18) | (data & 0x1f0000) >> 5;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) << 1 | (data & 0x3e0) >> 2;
|
||
*o++ = (data & 0x1f) << 11 | (data & 0x7c000000) >> 23;
|
||
*o++ = ((data & 0x3e00000) >> 10) | (data & 0x1f0000) >> 13;
|
||
#endif
|
||
}
|
||
/* check for last remaining pixel */
|
||
if (width & 1) {
|
||
register unsigned short data;
|
||
#ifdef LITTLE
|
||
data = *((short *) s);
|
||
data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
|
||
#else
|
||
data = *((short *) s);
|
||
#endif
|
||
((char *) o)[0] = (data & 0x7c0) >> 7;
|
||
((char *) o)[1] = (data & 0x3e0) >> 2;
|
||
((char *) o)[2] = (data & 0x1f) << 3;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
with alpha
|
||
data in lsb format
|
||
*/
|
||
static void
|
||
rgb555alsb (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register unsigned short *s; /* read 1 pixels at once */
|
||
#else
|
||
register unsigned char *s;
|
||
#endif
|
||
register unsigned long *o;
|
||
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (unsigned short *) srow;
|
||
#else
|
||
s = srow;
|
||
#endif
|
||
o = (unsigned long *) orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
register unsigned long data;
|
||
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
|
||
#ifdef LITTLE
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) >> 7 | (data & 0x3e0) << 6
|
||
| (data & 0x1f) << 19 | 0xff000000;
|
||
#else
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0x7c00) << 17 | (data & 0x3e0) << 14
|
||
| (data & 0x1f) << 11 | 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
with alpha
|
||
data in msb format
|
||
*/
|
||
static void
|
||
rgb555amsb (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register unsigned short *s; /* read 1 pixels at once */
|
||
#else
|
||
register unsigned char *s;
|
||
#endif
|
||
register unsigned long *o;
|
||
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (unsigned short *) srow;
|
||
#else
|
||
s = srow;
|
||
#endif
|
||
o = (unsigned long *) orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
register unsigned long data;
|
||
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
|
||
#ifdef LITTLE
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0x7c00) >>7 | (data & 0x3e0) << 6
|
||
| (data & 0x1f) << 19 | 0xff000000;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) << 17 | (data & 0x3e0) << 14
|
||
| (data & 0x1f) << 11 | 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
rgb888alsb (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
unsigned char *s; /* for byte order swapping */
|
||
unsigned char *o;
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
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 (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
unsigned char *o, *s;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
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 (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
#ifdef LITTLE
|
||
unsigned long *o;
|
||
unsigned long *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->bpl;
|
||
|
||
/* msb data */
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (unsigned long *) srow;
|
||
o = (unsigned long *) 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 (GdkImage *image, art_u8 *pixels, int rowstride)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
unsigned char *srow = image->mem, *orow = pixels;
|
||
unsigned char *s;
|
||
unsigned char *o;
|
||
|
||
d (printf ("32 bit, msb, no alpha\n"));
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bpl;
|
||
|
||
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;
|
||
}
|
||
}
|
||
|
||
typedef void (* cfunc) (GdkImage *image, art_u8 *pixels, int rowstride);
|
||
|
||
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
|
||
*/
|
||
static void
|
||
rgbconvert (GdkImage *image, art_u8 *pixels, int rowstride, int alpha)
|
||
{
|
||
int index = (image->byte_order == GDK_MSB_FIRST) | (alpha != 0) << 1;
|
||
int bank=0;
|
||
|
||
switch (image->depth) {
|
||
case 1:
|
||
bank = 0;
|
||
break;
|
||
|
||
case 8:
|
||
bank = 1;
|
||
break;
|
||
|
||
case 15:
|
||
bank = 2;
|
||
break;
|
||
|
||
case 16:
|
||
bank = 3;
|
||
break;
|
||
|
||
case 24:
|
||
case 32:
|
||
bank = 4;
|
||
break;
|
||
}
|
||
|
||
index |= bank << 2;
|
||
(* convert_map[index]) (image, pixels, rowstride);
|
||
}
|
||
|
||
static GdkPixbuf *
|
||
gdk_pixbuf_from_drawable_core (GdkPixmap * window, gint x, gint y, gint width,
|
||
gint height, gint with_alpha)
|
||
{
|
||
GdkImage *image;
|
||
ArtPixBuf *art_pixbuf;
|
||
art_u8 *buff;
|
||
art_u8 *pixels;
|
||
gint rowstride;
|
||
gint fatness;
|
||
gint screen_width, screen_height;
|
||
gint window_width, window_height, window_x, window_y;
|
||
int bpl;
|
||
|
||
g_return_val_if_fail (window != NULL, NULL);
|
||
|
||
/* always returns image in ZPixmap format ... */
|
||
image = gdk_image_get (window, x, y, width, height);
|
||
|
||
fatness = with_alpha ? 4 : 3;
|
||
rowstride = width * fatness;
|
||
|
||
buff = art_alloc (rowstride * height);
|
||
pixels = buff;
|
||
|
||
#if 0
|
||
printf ("bpp = %d\n", image->bpp);
|
||
printf ("depth = %d\n", image->depth);
|
||
printf ("byte order = %d\n", image->byte_order);
|
||
printf ("bytes/line = %d\n", image->bpl);
|
||
#endif
|
||
|
||
bpl = image->bpl;
|
||
|
||
rgbconvert (image, pixels, rowstride, with_alpha);
|
||
gdk_image_destroy (image);
|
||
|
||
if (with_alpha)
|
||
art_pixbuf = art_pixbuf_new_rgba (buff, width, height, rowstride);
|
||
else
|
||
art_pixbuf = art_pixbuf_new_rgb (buff, width, height, rowstride);
|
||
|
||
return gdk_pixbuf_new_from_art_pixbuf (art_pixbuf);
|
||
}
|
||
|
||
|
||
|
||
/* Exported functions */
|
||
|
||
/**
|
||
* gdk_pixbuf_get_from_drawable:
|
||
* @dest: Destination pixbuf, or NULL if a new pixbuf should be created.
|
||
* @src: Source drawable.
|
||
* @cmap: A colormap if @src is a pixmap. If it is a window, this argument will
|
||
* be ignored.
|
||
* @src_x: Source X coordinate within drawable.
|
||
* @src_y: Source Y coordinate within drawable.
|
||
* @dest_x: Destination X coordinate in pixbuf, or 0 if @dest is NULL.
|
||
* @dest_y: Destination Y coordinate in pixbuf, or 0 if @dest is NULL.
|
||
* @width: Width in pixels of region to get.
|
||
* @height: Height in pixels of region to get.
|
||
*
|
||
* Transfers image data from a Gdk drawable and converts it to an RGB(A)
|
||
* representation inside a GdkPixbuf.
|
||
*
|
||
* If the drawable @src is a pixmap, then a suitable colormap must be specified,
|
||
* since pixmaps are just blocks of pixel data without an associated colormap.
|
||
* If the drawable is a window, the @cmap argument will be ignored and the
|
||
* window's own colormap will be used instead.
|
||
*
|
||
* If the specified destination pixbuf @dest is #NULL, then this function will
|
||
* create an RGB pixbuf with 8 bits per channel and no alpha, with the same size
|
||
* specified by the @width and @height arguments. In this case, the @dest_x and
|
||
* @dest_y arguments must be specified as 0, otherwise the function will return
|
||
* #NULL. If the specified destination pixbuf is not NULL and it contains alpha
|
||
* information, then the filled pixels will be set to full opacity.
|
||
*
|
||
* If the specified drawable is a pixmap, then the requested source rectangle
|
||
* must be completely contained within the pixmap, otherwise the function will
|
||
* return #NULL.
|
||
*
|
||
* If the specified drawable is a window, then it must be viewable, i.e. all of
|
||
* its ancestors up to the root window must be mapped. Also, the specified
|
||
* source rectangle must be completely contained within the window and within
|
||
* the screen. If regions of the window are obscured by noninferior windows, the
|
||
* contents of those regions are undefined. The contents of regions obscured by
|
||
* inferior windows of a different depth than that of the source window will also
|
||
* be undefined.
|
||
*
|
||
* Return value: The same pixbuf as @dest if it was non-NULL, or a newly-created
|
||
* pixbuf with a reference count of 1 if no destination pixbuf was specified.
|
||
**/
|
||
GdkPixbuf *
|
||
gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
|
||
GdkDrawable *src, GdkColormap *cmap,
|
||
int src_x, int src_y,
|
||
int dest_x, int dest_y,
|
||
int width, int height)
|
||
{
|
||
GdkWindowType window_type;
|
||
gint src_width, src_height;
|
||
ArtPixBuf *apb;
|
||
|
||
/* General sanity checks */
|
||
|
||
g_return_val_if_fail (src != NULL, NULL);
|
||
|
||
window_type = gdk_window_get_type (src);
|
||
|
||
if (window_type == GDK_WINDOW_PIXMAP)
|
||
g_return_val_if_fail (cmap != NULL, NULL);
|
||
else
|
||
/* FIXME: this is not perfect, since is_viewable() only tests
|
||
* recursively up the Gdk parent window tree, but stops at
|
||
* foreign windows or Gdk toplevels. I.e. if a window manager
|
||
* unmapped one of its own windows, this won't work.
|
||
*/
|
||
g_return_val_if_fail (gdk_window_is_viewable (src), NULL);
|
||
|
||
if (!dest)
|
||
g_return_val_if_fail (dest_x == 0 && dest_y == 0, NULL);
|
||
else {
|
||
apb = dest->art_pixbuf;
|
||
|
||
g_return_val_if_fail (apb->format == ART_PIX_RGB, NULL);
|
||
g_return_val_if_fail (apb->n_channels == 3 || apb->n_channels == 4, NULL);
|
||
g_return_val_if_fail (apb->bits_per_sample == 8, NULL);
|
||
}
|
||
|
||
/* Coordinate sanity checks */
|
||
|
||
gdk_window_get_size (src, &src_width, &src_height);
|
||
|
||
g_return_val_if_fail (src_x >= 0 && src_y >= 0, NULL);
|
||
g_return_val_if_fail (src_x + width <= src_width && src_y + height <= src_height, NULL);
|
||
|
||
if (dest) {
|
||
g_return_val_if_fail (dest_x >= 0 && dest_y >= 0, NULL);
|
||
g_return_val_if_fail (dest_x + width <= apb->width, NULL);
|
||
g_return_val_if_fail (dest_y + height <= apb->height, NULL);
|
||
}
|
||
|
||
if (window_type != GDK_WINDOW_PIXMAP) {
|
||
int ret;
|
||
gint src_xorigin, src_yorigin;
|
||
int screen_width, screen_height;
|
||
int screen_srcx, screen_srcy;
|
||
|
||
ret = gdk_window_get_origin (src, &src_xorigin, &src_yorigin);
|
||
g_return_val_if_fail (ret != FALSE, NULL);
|
||
|
||
screen_width = gdk_screen_width ();
|
||
screen_height = gdk_screen_height ();
|
||
|
||
screen_srcx = src_xorigin + src_x;
|
||
screen_srcy = src_yorigin + src_y;
|
||
|
||
g_return_val_if_fail (screen_srcx >= 0 && screen_srcy >= 0, NULL);
|
||
g_return_val_if_fail (screen_srcx + width <= screen_width, NULL);
|
||
g_return_val_if_fail (screen_srcy + height <= screen_height, NULL);
|
||
}
|
||
|
||
/* Create the pixbuf if needed */
|
||
|
||
if (!dest) {
|
||
dest = gdk_pixbuf_new (ART_PIX_RGB, FALSE, 8, width, height);
|
||
if (!dest)
|
||
return NULL;
|
||
|
||
apb = dest->art_pixbuf;
|
||
}
|
||
|
||
/* Get the colormap if needed */
|
||
|
||
if (window_type != GDK_WINDOW_PIXMAP)
|
||
cmap = gdk_window_get_colormap (src);
|
||
|
||
/* FIXME: fill in the body here */
|
||
|
||
return dest;
|
||
}
|