-/* -*- 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
* Federico Mena-Quintero <federico@gimp.org>
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser 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.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
-#include <config.h>
+#include "config.h"
#include <stdio.h>
#include <string.h>
-#include "gdk-pixbuf-private.h"
-
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "gdkcolor.h"
+#include "gdkimage.h"
+#include "gdkvisual.h"
+#include "gdkwindow.h"
+#include "gdkpixbuf.h"
+#include "gdkpixmap.h"
+#include "gdkinternals.h"
+#include "gdkalias.h"
+
+/* Some convenient names
+ */
#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
#define LITTLE
+#undef BIG
+#else
+#define BIG
+#undef LITTLE
#endif
#define d(x)
+#define SWAP16(d) GUINT16_SWAP_LE_BE(d)
+
\f
-static guint32 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
+static const guint32 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
};
\f
/*
- convert 1 bits-pixel data
- no alpha
-*/
+ * convert bitmap data to pixbuf without alpha,
+ * without using a colormap
+ */
static void
-rgb1 (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+bitmap1 (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2)
{
- int xx, yy;
- int width, height;
- int bpl;
- guint8 *s;
- register guint8 data;
- guint8 *o;
- guint8 *srow = image->mem, *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->bpl;
-
- 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;
+ int xx, yy;
+ int bpl;
+ register guint8 data;
+ guint8 *o;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl, *orow = pixels;
+
+ d (printf ("bitmap, no alpha\n"));
+
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ o = orow;
+
+ for (xx = x1; xx < x2; xx ++)
+ {
+ /* top 29 bits of xx (xx >> 3) indicate the byte the bit is inside,
+ * bottom 3 bits (xx & 7) indicate bit inside that byte,
+ * we don't bother to canonicalize data to 1 or 0, just
+ * leave the relevant bit in-place.
+ */
+ data = srow[xx >> 3] & (image->byte_order == GDK_MSB_FIRST ?
+ (0x80 >> (xx & 7)) :
+ (1 << (xx & 7)));
+
+ if (data)
+ {
+ *o++ = 255;
+ *o++ = 255;
+ *o++ = 255;
+ }
+ else
+ {
+ *o++ = 0;
+ *o++ = 0;
+ *o++ = 0;
+ }
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 1 bits/pixel data
- with alpha
-*/
+ * convert bitmap data to pixbuf with alpha,
+ * without using a colormap
+ */
static void
-rgb1a (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+bitmap1a (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2)
{
- int xx, yy;
- int width, height;
- int bpl;
- guint8 *s;
- register guint8 data;
- guint8 *o;
- guint8 *srow = image->mem, *orow = pixels;
- guint32 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->bpl;
-
- 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
+ int xx, yy;
+ int bpl;
+ register guint8 data;
+ guint8 *o;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl, *orow = pixels;
+
+ d (printf ("bitmap, with alpha\n"));
+
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ o = orow;
+
+ for (xx = x1; xx < x2; xx ++)
+ {
+ /* see comment in bitmap1() */
+ data = srow[xx >> 3] & (image->byte_order == GDK_MSB_FIRST ?
+ (0x80 >> (xx & 7)) :
+ (1 << (xx & 7)));
+
+ if (data)
+ {
+ *o++ = 255;
+ *o++ = 255;
+ *o++ = 255;
+ *o++ = 255;
+ }
+ else
+ {
+ *o++ = 0;
+ *o++ = 0;
+ *o++ = 0;
+ *o++ = 0;
+ }
}
+ srow += bpl;
+ orow += rowstride;
+ }
+}
- 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 1 bits-pixel data
+ * no alpha
+ */
+static void
+rgb1 (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+ register guint8 data;
+ guint8 *o;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl, *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?
+ */
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ o = orow;
+
+ for (xx = x1; xx < x2; xx ++)
+ {
+ /* see comment in bitmap1() */
+ data = srow[xx >> 3] & (image->byte_order == GDK_MSB_FIRST ?
+ (0x80 >> (xx & 7)) :
+ (1 << (xx & 7)));
+
+ *o++ = colormap->colors[data].red >> 8;
+ *o++ = colormap->colors[data].green >> 8;
+ *o++ = colormap->colors[data].blue >> 8;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 8 bits/pixel data
- no alpha
-*/
+ * convert 1 bits/pixel data
+ * with alpha
+ */
static void
-rgb8 (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb1a (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
- guint32 mask;
- register guint32 data;
- guint8 *srow = image->mem, *orow = pixels;
- register guint8 *s;
- register guint8 *o;
-
- width = image->width;
- height = image->height;
- bpl = image->bpl;
-
- 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;
+ int xx, yy;
+ int bpl;
+ register guint8 data;
+ guint8 *o;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl, *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? */
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ o = orow;
+
+ for (xx = x1; xx < x2; xx ++)
+ {
+ /* see comment in bitmap1() */
+ data = srow[xx >> 3] & (image->byte_order == GDK_MSB_FIRST ?
+ (0x80 >> (xx & 7)) :
+ (1 << (xx & 7)));
+
+ *o++ = colormap->colors[data].red >> 8;
+ *o++ = colormap->colors[data].green >> 8;
+ *o++ = colormap->colors[data].blue >> 8;
+ *o++ = 255;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 8 bits/pixel data
- with alpha
-*/
+ * convert 8 bits/pixel data
+ * no alpha
+ */
static void
-rgb8a (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb8 (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
- guint32 mask;
- register guint32 data;
- guint32 remap[256];
- register guint8 *s; /* read 2 pixels at once */
- register guint32 *o;
- guint8 *srow = image->mem, *orow = pixels;
+ int xx, yy;
+ int bpl;
+ guint32 mask;
+ register guint32 data;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+ register guint8 *s;
+ register guint8 *o;
+
+ bpl = image->bpl;
+
+ d (printf ("8 bit, no alpha output\n"));
+
+ mask = mask_table[image->depth];
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = srow;
+ o = orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ data = *s++ & mask;
+ *o++ = colormap->colors[data].red >> 8;
+ *o++ = colormap->colors[data].green >> 8;
+ *o++ = colormap->colors[data].blue >> 8;
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+/*
+ * convert 8 bits/pixel data
+ * with alpha
+ */
+static void
+rgb8a (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+ guint32 mask;
+ register guint32 data;
+ guint32 remap[256];
+ register guint8 *s; /* read 2 pixels at once */
+ register guint32 *o;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+
+ bpl = image->bpl;
- d (printf ("8 bit, with alpha output\n"));
+ d (printf ("8 bit, with alpha output\n"));
- mask = mask_table[image->depth];
+ mask = mask_table[image->depth];
- for (xx = 0; xx < colormap->size; xx++) {
+ for (xx = x1; xx < colormap->size; xx++)
+ {
#ifdef LITTLE
- remap[xx] = 0xff000000
- | colormap->colors[xx].blue << 16
- | colormap->colors[xx].green << 8
- | colormap->colors[xx].red;
+ remap[xx] = 0xff000000
+ | (colormap->colors[xx].blue & 0xff00) << 8
+ | (colormap->colors[xx].green & 0xff00)
+ | (colormap->colors[xx].red >> 8);
#else
- remap[xx] = 0xff
- | colormap->colors[xx].red << 24
- | colormap->colors[xx].green << 16
- | colormap->colors[xx].blue << 8;
+ remap[xx] = 0xff
+ | (colormap->colors[xx].red & 0xff00) << 16
+ | (colormap->colors[xx].green & 0xff00) << 8
+ | (colormap->colors[xx].blue & 0xff00);
#endif
+ }
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ data = *s++ & mask;
+ *o++ = remap[data];
}
-
- for (yy = 0; yy < height; yy++) {
- s = srow;
- o = (guint32 *) orow;
- for (xx = 0; xx < width; xx ++) {
- data = *s++ & mask;
- *o++ = remap[data];
- }
- srow += bpl;
- orow += rowstride;
- }
+ srow += bpl;
+ orow += rowstride;
+ }
}
+/* Bit shifting for 565 and 555 conversion routines
+ *
+ * RGB565 == rrrr rggg gggb bbbb, 16 bit native endian
+ * RGB555 == xrrr rrgg gggb bbbb
+ * ABGR8888: ARGB, 32-bit native endian
+ * RGBA8888: RGBA, 32-bit native endian
+ */
+#define R8fromRGB565(d) ((((d) >> 8) & 0xf8) | (((d) >> 13) & 0x7))
+#define G8fromRGB565(d) ((((d) >> 3) & 0xfc) | (((d) >> 9) & 0x3))
+#define B8fromRGB565(d) ((((d) << 3) & 0xf8) | (((d) >> 2) & 0x7))
+
+#define ABGR8888fromRGB565(d) ( ((d) & 0xf800) >> 8 | ((d) & 0xe000) >> 13 \
+ | ((d) & 0x07e0) << 5 | ((d) & 0x0600) >> 1 \
+ | ((d) & 0x001f) << 19 | ((d) & 0x001c) << 14 \
+ | 0xff000000)
+#define RGBA8888fromRGB565(d) ( ((d) & 0xf800) << 16 | ((d) & 0xe000) << 11 \
+ | ((d) & 0x07e0) << 13 | ((d) & 0x0600) << 7 \
+ | ((d) & 0x001f) << 11 | ((d) & 0x001c) << 6 \
+ | 0xff)
+
+#define R8fromRGB555(d) (((d) & 0x7c00) >> 7 | ((d) & 0x7000) >> 12)
+#define G8fromRGB555(d) (((d) & 0x03e0) >> 2 | ((d) & 0x0380) >> 7)
+#define B8fromRGB555(d) (((d) & 0x001f) << 3 | ((d) & 0x001c) >> 2)
+
+#define ABGR8888fromRGB555(d) ( ((d) & 0x7c00) >> 7 | ((d) & 0x7000) >> 12 \
+ | ((d) & 0x03e0) << 6 | ((d) & 0x0380) << 1 \
+ | ((d) & 0x001f) << 19 | ((d) & 0x001c) << 14 \
+ | 0xff000000)
+#define RGBA8888fromRGB555(d) ( ((d) & 0x7c00) << 17 | ((d) & 0x7000) << 12 \
+ | ((d) & 0x03e0) << 14 | ((d) & 0x0380) << 9 \
+ | ((d) & 0x001f) << 11 | ((d) & 0x001c) << 6 \
+ | 0xff)
+
/*
- convert 16 bits/pixel data
- no alpha
- data in lsb format
-*/
+ * convert 16 bits/pixel data
+ * no alpha
+ * data in lsb format
+ */
static void
-rgb565lsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb565lsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
-
-#ifdef LITTLE
- register guint32 *s; /* read 2 pixels at once */
-#else
- register guint8 *s; /* read 2 pixels at once */
-#endif
- register guint16 *o;
- guint8 *srow = image->mem, *orow = pixels;
-
- width = image->width;
- height = image->height;
- bpl = image->bpl;
-
- for (yy = 0; yy < height; yy++) {
-#ifdef LITTLE
- s = (guint32 *) srow;
-#else
- s = srow;
-#endif
- o = (guint16 *) orow;
- for (xx = 1; xx < width; xx += 2) {
- register guint32 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) {
- register guint16 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;
+ int xx, yy;
+ int bpl;
+
+ register guint16 *s;
+ register guint8 *o;
+
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint8 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
+#ifdef BIG
+ data = SWAP16 (data);
+#endif
+ *o++ = R8fromRGB565 (data);
+ *o++ = G8fromRGB565 (data);
+ *o++ = B8fromRGB565 (data);
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 16 bits/pixel data
- no alpha
- data in msb format
-*/
+ * convert 16 bits/pixel data
+ * no alpha
+ * data in msb format
+ */
static void
-rgb565msb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb565msb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
-#ifdef LITTLE
- register guint8 *s; /* need to swap data order */
-#else
- register guint32 *s; /* read 2 pixels at once */
-#endif
- register guint16 *o;
- guint8 *srow = image->mem, *orow = pixels;
+ register guint16 *s;
+ register guint8 *o;
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
- for (yy = 0; yy < height; yy++) {
-#ifdef LITTLE
- s = srow;
-#else
- s = (guint32 *) srow;
-#endif
- o = (guint16 *) orow;
- for (xx = 1; xx < width; xx += 2) {
- register guint32 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) {
- register guint16 data;
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint8 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
#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;
+ data = SWAP16 (data);
+#endif
+ *o++ = R8fromRGB565 (data);
+ *o++ = G8fromRGB565 (data);
+ *o++ = B8fromRGB565 (data);
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 16 bits/pixel data
- with alpha
- data in lsb format
-*/
+ * convert 16 bits/pixel data
+ * with alpha
+ * data in lsb format
+ */
static void
-rgb565alsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb565alsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
-#ifdef LITTLE
- register guint16 *s; /* read 1 pixels at once */
-#else
- register guint8 *s;
-#endif
- register guint32 *o;
+ register guint16 *s;
+ register guint32 *o;
- guint8 *srow = image->mem, *orow = pixels;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+ bpl = image->bpl;
- for (yy = 0; yy < height; yy++) {
-#ifdef LITTLE
- s = (guint16 *) srow;
-#else
- s = (guint8 *) srow;
-#endif
- o = (guint32 *) orow;
- for (xx = 0; xx < width; xx ++) {
- register guint32 data;
- /* rrrrrggg gggbbbbb -> rrrrrRRR ggggggGG bbbbbBBB aaaaaaaa */
- /* little endian: aaaaaaaa bbbbbBBB ggggggGG rrrrrRRR */
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
#ifdef LITTLE
- data = *s++;
- *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
- | (data & 0x7e0) << 5 | (data & 0x600) >> 1
- | (data & 0x1f) << 19 | (data & 0x1c) << 14
- | 0xff000000;
+ *o++ = ABGR8888fromRGB565 (data);
#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;
+ data = SWAP16 (data);
+ *o++ = RGBA8888fromRGB565 (data);
#endif
- }
- srow += bpl;
- orow += rowstride;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 16 bits/pixel data
- with alpha
- data in msb format
-*/
+ * convert 16 bits/pixel data
+ * with alpha
+ * data in msb format
+ */
static void
-rgb565amsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb565amsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
-#ifdef LITTLE
- register guint8 *s;
-#else
- register guint16 *s; /* read 1 pixels at once */
-#endif
- register guint32 *o;
+ register guint16 *s;
+ register guint32 *o;
- guint8 *srow = image->mem, *orow = pixels;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+ bpl = image->bpl;
- for (yy = 0; yy < height; yy++) {
- s = srow;
- o = (guint32 *) orow;
- for (xx = 0; xx < width; xx ++) {
- register guint32 data;
- /* rrrrrggg gggbbbbb -> rrrrrRRR gggggg00 bbbbbBBB aaaaaaaa */
- /* little endian: aaaaaaaa bbbbbBBB gggggg00 rrrrrRRR */
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
#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;
+ data = SWAP16 (data);
+ *o++ = ABGR8888fromRGB565 (data);
#else
- data = *s++;
- *o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
- | (data & 0x7e0) << 13 | (data & 0x600) << 7
- | (data & 0x1f) << 11 | (data & 0x1c) << 6
- | 0xff;
+ *o++ = RGBA8888fromRGB565 (data);
#endif
- }
- srow += bpl;
- orow += rowstride;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 15 bits/pixel data
- no alpha
- data in lsb format
-*/
+ * convert 15 bits/pixel data
+ * no alpha
+ * data in lsb format
+ */
static void
-rgb555lsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb555lsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
-
-#ifdef LITTLE
- register guint32 *s; /* read 2 pixels at once */
-#else
- register guint8 *s; /* read 2 pixels at once */
-#endif
- register guint16 *o;
- guint8 *srow = image->mem, *orow = pixels;
-
- width = image->width;
- height = image->height;
- bpl = image->bpl;
-
- for (yy = 0; yy < height; yy++) {
-#ifdef LITTLE
- s = (guint32 *) srow;
-#else
- s = srow;
-#endif
- o = (guint16 *) orow;
- for (xx = 1; xx < width; xx += 2) {
- register guint32 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) {
- register guint16 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;
+ int xx, yy;
+ int bpl;
+
+ register guint16 *s;
+ register guint8 *o;
+
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint8 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
+#ifdef BIG
+ data = SWAP16 (data);
+#endif
+ *o++ = R8fromRGB555 (data);
+ *o++ = G8fromRGB555 (data);
+ *o++ = B8fromRGB555 (data);
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 15 bits/pixel data
- no alpha
- data in msb format
-*/
+ * convert 15 bits/pixel data
+ * no alpha
+ * data in msb format
+ */
static void
-rgb555msb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb555msb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
+ register guint16 *s;
+ register guint8 *o;
+
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint8 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
#ifdef LITTLE
- register guint8 *s; /* read 2 pixels at once */
-#else
- register guint32 *s; /* read 2 pixels at once */
-#endif
- register guint16 *o;
- guint8 *srow = image->mem, *orow = pixels;
-
- width = image->width;
- height = image->height;
- bpl = image->bpl;
-
- for (yy = 0; yy < height; yy++) {
- s = srow;
- o = (guint16 *) orow;
- for (xx = 1; xx < width; xx += 2) {
- register guint32 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) {
- register guint16 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;
+ data = SWAP16 (data);
+#endif
+ *o++ = R8fromRGB555 (data);
+ *o++ = G8fromRGB555 (data);
+ *o++ = B8fromRGB555 (data);
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 15 bits/pixel data
- with alpha
- data in lsb format
-*/
+ * convert 15 bits/pixel data
+ * with alpha
+ * data in lsb format
+ */
static void
-rgb555alsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb555alsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
-#ifdef LITTLE
- register guint16 *s; /* read 1 pixels at once */
-#else
- register guint8 *s;
-#endif
- register guint32 *o;
+ register guint16 *s; /* read 1 pixels at once */
+ register guint32 *o;
- guint8 *srow = image->mem, *orow = pixels;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+ bpl = image->bpl;
- for (yy = 0; yy < height; yy++) {
-#ifdef LITTLE
- s = (guint16 *) srow;
-#else
- s = srow;
-#endif
- o = (guint32 *) orow;
- for (xx = 0; xx < width; xx++) {
- register guint32 data;
- /* rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */
- /* little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ register guint32 data = *s++;
#ifdef LITTLE
- data = *s++;
- *o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
- | (data & 0x3e0) << 6 | (data & 0x380) << 1
- | (data & 0x1f) << 19 | (data & 0x1c) << 14
- | 0xff000000;
+ *o++ = ABGR8888fromRGB555 (data);
#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;
+ data = SWAP16 (data);
+ *o++ = RGBA8888fromRGB555 (data);
#endif
- }
- srow += bpl;
- orow += rowstride;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
/*
- convert 15 bits/pixel data
- with alpha
- data in msb format
-*/
+ * convert 15 bits/pixel data
+ * with alpha
+ * data in msb format
+ */
static void
-rgb555amsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb555amsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
-#ifdef LITTLE
- register guint16 *s; /* read 1 pixels at once */
-#else
- register guint8 *s;
-#endif
- register guint32 *o;
+ register guint16 *s;
+ register guint32 *o;
- guint8 *srow = image->mem, *orow = pixels;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+ bpl = image->bpl;
- for (yy = 0; yy < height; yy++) {
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint16 *) srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ register guint32 data = *s++;
#ifdef LITTLE
- s = (guint16 *) srow;
+ data = SWAP16 (data);
+ *o++ = ABGR8888fromRGB555 (data);
#else
- s = srow;
+ *o++ = RGBA8888fromRGB555 (data);
#endif
- o = (guint32 *) orow;
- for (xx = 0; xx < width; xx++) {
- register guint32 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;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
static void
-rgb888alsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb888alsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
-
- guint8 *s; /* for byte order swapping */
- guint8 *o;
- guint8 *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;
+ int xx, yy;
+ int bpl;
+
+ guint8 *s; /* for byte order swapping */
+ guint8 *o;
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+
+ bpl = image->bpl;
+
+ d (printf ("32 bits/pixel with alpha\n"));
+
+ /* lsb data */
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = srow;
+ o = orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ *o++ = s[2];
+ *o++ = s[1];
+ *o++ = s[0];
+ *o++ = 0xff;
+ s += 4;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
static void
-rgb888lsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb888lsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
-
- guint8 *srow = image->mem, *orow = pixels;
- guint8 *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;
+ int xx, yy;
+ int bpl;
+
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+ guint8 *o, *s;
+
+ bpl = image->bpl;
+
+ d (printf ("32 bit, lsb, no alpha\n"));
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = srow;
+ o = orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ *o++ = s[2];
+ *o++ = s[1];
+ *o++ = s[0];
+ s += 4;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
static void
-rgb888amsb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb888amsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
+ int xx, yy;
+ int bpl;
- guint8 *srow = image->mem, *orow = pixels;
-#ifdef LITTLE
- guint32 *o;
- guint32 *s;
-#else
- guint8 *s; /* for byte order swapping */
- guint8 *o;
-#endif
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+ guint32 *o;
+ guint32 *s;
- d (printf ("32 bit, msb, with alpha\n"));
+ d (printf ("32 bit, msb, with alpha\n"));
- width = image->width;
- height = image->height;
- bpl = image->bpl;
+ bpl = image->bpl;
- /* msb data */
- for (yy = 0; yy < height; yy++) {
+ /* msb data */
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint32 *) srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx++)
+ {
#ifdef LITTLE
- s = (guint32 *) srow;
- o = (guint32 *) orow;
+ *o++ = (*s++ >> 8) | 0xff000000;
#else
- s = srow;
- o = orow;
+ *o++ = (*s++ << 8) | 0xff;
#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;
}
+ srow += bpl;
+ orow += rowstride;
+ }
}
static void
-rgb888msb (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *colormap)
+rgb888msb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
{
- int xx, yy;
- int width, height;
- int bpl;
-
- guint8 *srow = image->mem, *orow = pixels;
- guint8 *s;
- guint8 *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;
+ int xx, yy;
+ int bpl;
+
+ guint8 *srow = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
+ guint8 *s;
+ guint8 *o;
+
+ d (printf ("32 bit, msb, no alpha\n"));
+
+ bpl = image->bpl;
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = srow;
+ o = orow;
+ for (xx = x1; xx < x2; 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
-*/
+ * This should work correctly with any display/any endianness, but will probably
+ * run quite slow
+ */
static void
-convert_real_slow (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *cmap, int alpha)
+convert_real_slow (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *cmap,
+ gboolean alpha)
{
- int xx, yy;
- int width, height;
- int bpl;
- guint8 *srow = image->mem, *orow = pixels;
- guint8 *s;
- guint8 *o;
- guint32 pixel;
- GdkVisual *v;
- guint8 component;
- int i;
-
- width = image->width;
- height = image->height;
- bpl = image->bpl;
- v = gdk_colormap_get_visual(cmap);
-
- 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,
- v->red_shift, v->green_shift, v->blue_shift,
- v->red_prec, v->green_prec, v->blue_prec));
-
- for (yy = 0; yy < height; yy++) {
- s = srow;
- o = orow;
- for (xx = 0; xx < width; xx++) {
- pixel = gdk_image_get_pixel(image, xx, yy);
- switch (v->type) {
+ int xx, yy;
+ guint8 *orow = pixels;
+ guint8 *o;
+ guint32 pixel;
+ GdkVisual *v;
+ guint8 component;
+ int i;
+
+ v = gdk_colormap_get_visual (cmap);
+
+ if (image->depth != v->depth)
+ {
+ g_warning ("%s: The depth of the source image (%d) doesn't "
+ "match the depth of the colormap passed in (%d).",
+ G_STRLOC, image->depth, v->depth);
+ return;
+ }
+
+ 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,
+ v->red_shift, v->green_shift, v->blue_shift,
+ v->red_prec, v->green_prec, v->blue_prec));
+
+ for (yy = y1; yy < y2; yy++)
+ {
+ o = orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ pixel = gdk_image_get_pixel (image, xx, yy);
+ switch (v->type)
+ {
/* I assume this is right for static & greyscale's too? */
- case GDK_VISUAL_STATIC_GRAY:
- case GDK_VISUAL_GRAYSCALE:
- case GDK_VISUAL_STATIC_COLOR:
- case GDK_VISUAL_PSEUDO_COLOR:
- *o++ = cmap->colors[pixel].red;
- *o++ = cmap->colors[pixel].green;
- *o++ = cmap->colors[pixel].blue;
- break;
- case GDK_VISUAL_TRUE_COLOR:
+ case GDK_VISUAL_STATIC_GRAY:
+ case GDK_VISUAL_GRAYSCALE:
+ case GDK_VISUAL_STATIC_COLOR:
+ case GDK_VISUAL_PSEUDO_COLOR:
+ *o++ = cmap->colors[pixel].red >> 8;
+ *o++ = cmap->colors[pixel].green >> 8;
+ *o++ = cmap->colors[pixel].blue >> 8;
+ break;
+ case GDK_VISUAL_TRUE_COLOR:
/* 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 += v->red_prec)
- component |= ((pixel & v->red_mask) << (32 - v->red_shift - v->red_prec)) >> i;
- *o++ = component;
- component = 0;
- for (i = 24; i < 32; i += v->green_prec)
- component |= ((pixel & v->green_mask) << (32 - v->green_shift - v->green_prec)) >> i;
- *o++ = component;
- component = 0;
- for (i = 24; i < 32; i += v->blue_prec)
- component |= ((pixel & v->blue_mask) << (32 - v->blue_shift - v->blue_prec)) >> i;
- *o++ = component;
- break;
- case GDK_VISUAL_DIRECT_COLOR:
- *o++ = cmap->colors[((pixel & v->red_mask) << (32 - v->red_shift - v->red_prec)) >> 24].red;
- *o++ = cmap->colors[((pixel & v->green_mask) << (32 - v->green_shift - v->green_prec)) >> 24].green;
- *o++ = cmap->colors[((pixel & v->blue_mask) << (32 - v->blue_shift - v->blue_prec)) >> 24].blue;
- break;
- }
- if (alpha)
- *o++ = 0xff;
- }
- srow += bpl;
- orow += rowstride;
+ * 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 += v->red_prec)
+ component |= ((pixel & v->red_mask) << (32 - v->red_shift - v->red_prec)) >> i;
+ *o++ = component;
+ component = 0;
+ for (i = 24; i < 32; i += v->green_prec)
+ component |= ((pixel & v->green_mask) << (32 - v->green_shift - v->green_prec)) >> i;
+ *o++ = component;
+ component = 0;
+ for (i = 24; i < 32; i += v->blue_prec)
+ component |= ((pixel & v->blue_mask) << (32 - v->blue_shift - v->blue_prec)) >> i;
+ *o++ = component;
+ break;
+ case GDK_VISUAL_DIRECT_COLOR:
+ *o++ = cmap->colors[((pixel & v->red_mask) << (32 - v->red_shift - v->red_prec)) >> 24].red >> 8;
+ *o++ = cmap->colors[((pixel & v->green_mask) << (32 - v->green_shift - v->green_prec)) >> 24].green >> 8;
+ *o++ = cmap->colors[((pixel & v->blue_mask) << (32 - v->blue_shift - v->blue_prec)) >> 24].blue >> 8;
+ break;
+ }
+ if (alpha)
+ *o++ = 0xff;
}
+ orow += rowstride;
+ }
}
-typedef void (* cfunc) (GdkImage *image, guchar *pixels, int rowstride, GdkColormap *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
+typedef void (* cfunc) (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *cmap);
+
+static const 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.
-*/
+ * 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 (GdkImage *image, guchar *pixels, int rowstride, int alpha, GdkColormap *cmap)
+rgbconvert (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ gboolean alpha,
+ int x,
+ int y,
+ int width,
+ int height,
+ GdkColormap *cmap)
{
- int index = (image->byte_order == GDK_MSB_FIRST) | (alpha != 0) << 1;
- int bank=5; /* default fallback converter */
- GdkVisual *v = gdk_colormap_get_visual(cmap);
-
- 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->bpp));
-
- switch (v->type) {
+ int index;
+ int bank;
+ GdkVisual *v;
+
+ g_assert ((x + width) <= image->width);
+ g_assert ((y + height) <= image->height);
+
+ if (cmap == NULL)
+ {
+ /* Only allowed for bitmaps */
+ g_return_if_fail (image->depth == 1);
+
+ if (alpha)
+ bitmap1a (image, pixels, rowstride,
+ x, y, x + width, y + height);
+ else
+ bitmap1 (image, pixels, rowstride,
+ x, y, x + width, y + height);
+
+ return;
+ }
+
+ v = gdk_colormap_get_visual (cmap);
+
+ if (image->depth != v->depth)
+ {
+ g_warning ("%s: The depth of the source image (%d) doesn't "
+ "match the depth of the colormap passed in (%d).",
+ G_STRLOC, image->depth, v->depth);
+ return;
+ }
+
+ bank = 5; /* default fallback converter */
+ index = (image->byte_order == GDK_MSB_FIRST) | (alpha != 0) << 1;
+
+ d(printf("masks = %x:%x:%x\n", v->red_mask, v->green_mask, v->blue_mask));
+ d(printf("image depth = %d, bits per pixel = %d\n", image->depth, image->bits_per_pixel));
+
+ switch (v->type)
+ {
/* I assume this is right for static & greyscale's too? */
- case GDK_VISUAL_STATIC_GRAY:
- case GDK_VISUAL_GRAYSCALE:
- case GDK_VISUAL_STATIC_COLOR:
- case GDK_VISUAL_PSEUDO_COLOR:
- switch (image->bpp) {
- case 1:
- bank = 0;
- break;
- case 8:
- bank = 1;
- break;
- }
- break;
- case GDK_VISUAL_TRUE_COLOR:
- switch (image->depth) {
- case 15:
- if (v->red_mask == 0x7c00 && v->green_mask == 0x3e0 && v->blue_mask == 0x1f
- && image->bpp == 16)
- bank = 2;
- break;
- case 16:
- if (v->red_mask == 0xf800 && v->green_mask == 0x7e0 && v->blue_mask == 0x1f
- && image->bpp == 16)
- bank = 3;
- break;
- case 24:
- case 32:
- if (v->red_mask == 0xff0000 && v->green_mask == 0xff00 && v->blue_mask == 0xff
- && image->bpp == 32)
- bank = 4;
- break;
- }
- break;
- case GDK_VISUAL_DIRECT_COLOR:
- /* always use the slow version */
- break;
+ case GDK_VISUAL_STATIC_GRAY:
+ case GDK_VISUAL_GRAYSCALE:
+ case GDK_VISUAL_STATIC_COLOR:
+ case GDK_VISUAL_PSEUDO_COLOR:
+ switch (image->bits_per_pixel)
+ {
+ case 1:
+ bank = 0;
+ break;
+ case 8:
+ if (image->depth == 8)
+ bank = 1;
+ 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);
+ break;
+ case GDK_VISUAL_TRUE_COLOR:
+ 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 GDK_VISUAL_DIRECT_COLOR:
+ /* always use the slow version */
+ break;
+ }
+
+ d (g_print ("converting using conversion function in bank %d\n", bank));
+
+ if (bank == 5)
+ {
+ convert_real_slow (image, pixels, rowstride,
+ x, y, x + width, y + height,
+ cmap, alpha);
+ }
+ else
+ {
+ index |= bank << 2;
+ d (g_print ("converting with index %d\n", index));
+ (* convert_map[index]) (image, pixels, rowstride,
+ x, y, x + width, y + height,
+ cmap);
+ }
}
/**
* gdk_pixbuf_get_from_drawable:
- * @dest: Destination pixbuf, or NULL if a new pixbuf should be created.
+ * @dest: (allow-none): 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.
+ * @cmap: A colormap if @src doesn't have one set.
* @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.
* @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.
+ * Transfers image data from a #GdkDrawable and converts it to an RGB(A)
+ * representation inside a #GdkPixbuf. In other words, copies
+ * image data from a server-side drawable to a client-side RGB(A) buffer.
+ * This allows you to efficiently read individual pixels on the client side.
+ *
+ * If the drawable @src has no colormap (gdk_drawable_get_colormap()
+ * returns %NULL), then a suitable colormap must be specified.
+ * Typically a #GdkWindow or a pixmap created by passing a #GdkWindow
+ * to gdk_pixmap_new() will already have a colormap associated with
+ * it. If the drawable has a colormap, the @cmap argument will be
+ * ignored. If the drawable is a bitmap (1 bit per pixel pixmap),
+ * then a colormap is not required; pixels with a value of 1 are
+ * assumed to be white, and pixels with a value of 0 are assumed to be
+ * black. For taking screenshots, gdk_colormap_get_system() returns
+ * the correct colormap to use.
+ *
+ * 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. If the specified destination pixbuf is not %NULL
+ * and it contains alpha information, then the filled pixels will be
+ * set to full opacity (alpha = 255).
+ *
+ * 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. For pixmaps only (not for windows)
+ * passing -1 for width or height is allowed to mean the full width
+ * or height of the pixmap.
*
- * 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 drawable is a window, and the window is off the
+ * screen, then there is no image data in the obscured/offscreen
+ * regions to be placed in the pixbuf. The contents of portions of the
+ * pixbuf corresponding to the offscreen region are undefined.
*
- * 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 window you're obtaining data from is partially obscured by
+ * other windows, then the contents of the pixbuf areas corresponding
+ * to the obscured regions are undefined.
+ *
+ * If the target drawable is not mapped (typically because it's
+ * iconified/minimized or not on the current workspace), then %NULL
+ * will be returned.
*
- * 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 memory can't be allocated for the return value, %NULL will be returned
+ * instead.
*
- * 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.
+ * (In short, there are several ways this function can fail, and if it fails
+ * it returns %NULL; so check the return value.)
*
- * 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; in
- * the latter case, NULL will be returned if not enough memory could be
- * allocated for the pixbuf to be created.
+ * This function calls gdk_drawable_get_image() internally and
+ * converts the resulting image to a #GdkPixbuf, so the
+ * documentation for gdk_drawable_get_image() may also be relevant.
+ *
+ * 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, or %NULL on error
**/
GdkPixbuf *
-gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
- GdkDrawable *src, GdkColormap *cmap,
- int src_x, int src_y,
+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)
+ int width, int height)
{
- GdkWindowType window_type;
- int src_width, src_height;
- GdkImage *image;
- int rowstride, bpp, alpha;
-
- /* 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 {
- g_return_val_if_fail (dest->colorspace == GDK_COLORSPACE_RGB, NULL);
- g_return_val_if_fail (dest->n_channels == 3 || dest->n_channels == 4, NULL);
- g_return_val_if_fail (dest->bits_per_sample == 8, NULL);
+ int src_width, src_height;
+ GdkImage *image;
+ int depth;
+ int x0, y0;
+
+ /* General sanity checks */
+
+ g_return_val_if_fail (src != NULL, NULL);
+
+ if (GDK_IS_WINDOW (src))
+ /* 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
+ {
+ g_return_val_if_fail (gdk_pixbuf_get_colorspace (dest) == GDK_COLORSPACE_RGB, NULL);
+ g_return_val_if_fail (gdk_pixbuf_get_n_channels (dest) == 3 ||
+ gdk_pixbuf_get_n_channels (dest) == 4, NULL);
+ g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (dest) == 8, NULL);
+ }
+
+ if (cmap == NULL)
+ cmap = gdk_drawable_get_colormap (src);
+
+ depth = gdk_drawable_get_depth (src);
+
+ if (depth != 1 && cmap == NULL)
+ {
+ g_warning ("%s: Source drawable has no colormap; either pass "
+ "in a colormap, or set the colormap on the drawable "
+ "with gdk_drawable_set_colormap()", G_STRLOC);
+ return NULL;
+ }
+
+ if (cmap != NULL && depth != cmap->visual->depth)
+ {
+ g_warning ("%s: Depth of the source drawable is %d where as "
+ "the visual depth of the colormap passed is %d",
+ G_STRLOC, depth, cmap->visual->depth);
+ return NULL;
+ }
+
+ /* Coordinate sanity checks */
+
+ if (GDK_IS_PIXMAP (src))
+ {
+ gdk_drawable_get_size (src, &src_width, &src_height);
+ if (width < 0)
+ width = src_width;
+ if (height < 0)
+ height = 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);
+ }
+
+ /* Create the pixbuf if needed */
+ if (!dest)
+ {
+ dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
+ if (dest == NULL)
+ return NULL;
+ }
+
+ if (dest)
+ {
+ g_return_val_if_fail (dest_x >= 0 && dest_y >= 0, NULL);
+ g_return_val_if_fail (dest_x + width <= gdk_pixbuf_get_width (dest), NULL);
+ g_return_val_if_fail (dest_y + height <= gdk_pixbuf_get_height (dest), NULL);
+ }
+
+ for (y0 = 0; y0 < height; y0 += GDK_SCRATCH_IMAGE_HEIGHT)
+ {
+ gint height1 = MIN (height - y0, GDK_SCRATCH_IMAGE_HEIGHT);
+ for (x0 = 0; x0 < width; x0 += GDK_SCRATCH_IMAGE_WIDTH)
+ {
+ gint xs0, ys0;
+
+ gint width1 = MIN (width - x0, GDK_SCRATCH_IMAGE_WIDTH);
+
+ image = _gdk_image_get_scratch (gdk_drawable_get_screen (src),
+ width1, height1, depth, &xs0, &ys0);
+
+ gdk_drawable_copy_to_image (src, image,
+ src_x + x0, src_y + y0,
+ xs0, ys0, width1, height1);
+
+ gdk_pixbuf_get_from_image (dest, image, cmap,
+ xs0, ys0, dest_x + x0, dest_y + y0,
+ width1, height1);
}
-
- /* 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 <= dest->width, NULL);
- g_return_val_if_fail (dest_y + height <= dest->height, NULL);
- }
-
- if (window_type != GDK_WINDOW_PIXMAP) {
- int ret;
- int 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);
- }
-
- /* Get Image in ZPixmap format (packed bits). */
- image = gdk_image_get (src, src_x, src_y, width, height);
- g_return_val_if_fail (image != NULL, NULL);
-
- /* Create the pixbuf if needed */
- if (!dest) {
- dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
- if (!dest) {
- gdk_image_destroy(image);
- return NULL;
- }
- }
-
- /* Get the colormap if needed */
- if (window_type != GDK_WINDOW_PIXMAP)
- cmap = gdk_window_get_colormap (src);
-
- alpha = dest->has_alpha;
- rowstride = dest->rowstride;
- bpp = alpha ? 4 : 3;
-
- /* we offset into the image data based on the position we are retrieving from */
- rgbconvert (image, dest->pixels +
- (dest_y * rowstride) + (dest_x * bpp),
- rowstride,
- alpha,
- cmap);
-
- gdk_image_destroy(image);
-
- return dest;
+ }
+
+ return dest;
}
+
+/**
+ * gdk_pixbuf_get_from_image:
+ * @dest: (allow-none): Destination pixbuf, or %NULL if a new pixbuf should be created.
+ * @src: Source #GdkImage.
+ * @cmap: (allow-none): A colormap, or %NULL to use the one for @src
+ * @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.
+ *
+ * Same as gdk_pixbuf_get_from_drawable() but gets the pixbuf from
+ * an image.
+ *
+ * Return value: @dest, newly-created pixbuf if @dest was %NULL, %NULL on error
+ **/
+GdkPixbuf*
+gdk_pixbuf_get_from_image (GdkPixbuf *dest,
+ GdkImage *src,
+ GdkColormap *cmap,
+ int src_x,
+ int src_y,
+ int dest_x,
+ int dest_y,
+ int width,
+ int height)
+{
+ int rowstride, bpp, alpha;
+
+ /* General sanity checks */
+
+ g_return_val_if_fail (GDK_IS_IMAGE (src), NULL);
+
+ if (!dest)
+ g_return_val_if_fail (dest_x == 0 && dest_y == 0, NULL);
+ else
+ {
+ g_return_val_if_fail (gdk_pixbuf_get_colorspace (dest) == GDK_COLORSPACE_RGB, NULL);
+ g_return_val_if_fail (gdk_pixbuf_get_n_channels (dest) == 3 ||
+ gdk_pixbuf_get_n_channels (dest) == 4, NULL);
+ g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (dest) == 8, NULL);
+ }
+
+ if (cmap == NULL)
+ cmap = gdk_image_get_colormap (src);
+
+ if (src->depth != 1 && cmap == NULL)
+ {
+ g_warning ("%s: Source image has no colormap; either pass "
+ "in a colormap, or set the colormap on the image "
+ "with gdk_image_set_colormap()", G_STRLOC);
+ return NULL;
+ }
+
+ if (cmap != NULL && src->depth != cmap->visual->depth)
+ {
+ g_warning ("%s: Depth of the Source image is %d where as "
+ "the visual depth of the colormap passed is %d",
+ G_STRLOC, src->depth, cmap->visual->depth);
+ return NULL;
+ }
+
+ /* Coordinate sanity checks */
+
+ 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 <= gdk_pixbuf_get_width (dest), NULL);
+ g_return_val_if_fail (dest_y + height <= gdk_pixbuf_get_height (dest), NULL);
+ }
+
+ /* Create the pixbuf if needed */
+ if (!dest)
+ {
+ dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
+ if (dest == NULL)
+ return NULL;
+ }
+
+ alpha = gdk_pixbuf_get_has_alpha (dest);
+ rowstride = gdk_pixbuf_get_rowstride (dest);
+ bpp = alpha ? 4 : 3;
+
+ /* we offset into the image data based on the position we are
+ * retrieving from
+ */
+ rgbconvert (src, gdk_pixbuf_get_pixels (dest) +
+ (dest_y * rowstride) + (dest_x * bpp),
+ rowstride,
+ alpha,
+ src_x, src_y,
+ width,
+ height,
+ cmap);
+
+ return dest;
+}
+
+#define __GDK_PIXBUF_DRAWABLE_C__
+#include "gdkaliasdef.c"
projects / ~andy / gtk / blobdiff