-/*
- * Creates an GdkPixbuf from a Drawable
+/* GdkPixbuf library - convert X drawable information to RGB
+ *
+ * Copyright (C) 1999 Michael Zucchi
+ *
+ * Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
+ * Cody Russell <bratsche@dfw.net>
+ * 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 Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
*
- * Author:
- * Cody Russell <bratsche@dfw.net>
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * 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 <glib.h>
-#include <gmodule.h>
-#include "gdk-pixbuf.h"
-#include "gdk-pixbuf-drawable.h"
-
-/* private function */
-
-static GdkPixbuf *
-gdk_pixbuf_from_drawable_core (GdkWindow *window, gint x, gint y, gint width, gint height,
- gint with_alpha)
-{
- GdkImage *image;
- ArtPixBuf *art_pixbuf;
- GdkColormap *colormap;
- art_u8 *buff;
- art_u8 *pixels;
- gulong pixel;
- gint rowstride;
- art_u8 r, g, b;
- gint xx, yy;
- gint fatness;
- gint screen_width, screen_height;
- gint window_width, window_height, window_x, window_y;
-
- g_return_val_if_fail (window != NULL, NULL);
-
- screen_width = gdk_screen_width();
- screen_height = gdk_screen_height();
- gdk_window_get_geometry(window, NULL, NULL,
- &window_width, &window_height, NULL);
- gdk_window_get_origin(window, &window_x, &window_y);
-
- if(window_x < 0) {
- x = ABS(window_x);
- width = window_width - x;
- } else {
- width = CLAMP(window_x + window_width, window_x,
- screen_width) - window_x;
- }
-
- if(window_y < 0) {
- y = ABS(window_y);
- height = window_height - y;
- } else {
- height = CLAMP(window_y + window_height, window_y,
- screen_height) - window_y;
- }
-
- image = gdk_image_get (window, x, y, width, height);
- colormap = gdk_rgb_get_cmap ();
-
- fatness = with_alpha ? 4 : 3;
- rowstride = width * fatness;
-
- buff = art_alloc (rowstride * height);
- pixels = buff;
-
- switch (image->depth) {
- case 0:
+#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 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 bitmap data to pixbuf without alpha,
+ * without using a colormap
+ */
+static void
+bitmap1 (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2)
+{
+ 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 bitmap data to pixbuf with alpha,
+ * without using a colormap
+ */
+static void
+bitmap1a (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2)
+{
+ 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;
+ }
+}
+
+/*
+ * 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 1 bits/pixel data
+ * with alpha
+ */
+static void
+rgb1a (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;
+ *o++ = 255;
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ * convert 8 bits/pixel data
+ * no alpha
+ */
+static void
+rgb8 (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;
+ 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;
+ }
+}
+
+/*
+ * 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"));
+
+ mask = mask_table[image->depth];
+
+ for (xx = x1; xx < colormap->size; xx++)
+ {
+#ifdef LITTLE
+ 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 & 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];
+ }
+ 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
+ */
+static void
+rgb565lsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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
+ */
+static void
+rgb565msb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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
+ 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
+ */
+static void
+rgb565alsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+
+ register guint16 *s;
+ register guint32 *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 = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
+#ifdef LITTLE
+ *o++ = ABGR8888fromRGB565 (data);
+#else
+ data = SWAP16 (data);
+ *o++ = RGBA8888fromRGB565 (data);
+#endif
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ * convert 16 bits/pixel data
+ * with alpha
+ * data in msb format
+ */
+static void
+rgb565amsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+
+ register guint16 *s;
+ register guint32 *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 = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx ++)
+ {
+ register guint32 data = *s++;
+#ifdef LITTLE
+ data = SWAP16 (data);
+ *o++ = ABGR8888fromRGB565 (data);
+#else
+ *o++ = RGBA8888fromRGB565 (data);
+#endif
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ * convert 15 bits/pixel data
+ * no alpha
+ * data in lsb format
+ */
+static void
+rgb555lsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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
+ */
+static void
+rgb555msb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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
+ 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
+ */
+static void
+rgb555alsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+
+ register guint16 *s; /* read 1 pixels at once */
+ register guint32 *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 = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ register guint32 data = *s++;
+#ifdef LITTLE
+ *o++ = ABGR8888fromRGB555 (data);
+#else
+ data = SWAP16 (data);
+ *o++ = RGBA8888fromRGB555 (data);
+#endif
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ * convert 15 bits/pixel data
+ * with alpha
+ * data in msb format
+ */
+static void
+rgb555amsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+
+ register guint16 *s;
+ register guint32 *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 = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+ register guint32 data = *s++;
+#ifdef LITTLE
+ data = SWAP16 (data);
+ *o++ = ABGR8888fromRGB555 (data);
+#else
+ *o++ = RGBA8888fromRGB555 (data);
+#endif
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+
+static void
+rgb888alsb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ int xx, yy;
+ int bpl;
+
+ 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"));
+
+ bpl = image->bpl;
+
+ /* msb data */
+ for (yy = y1; yy < y2; yy++)
+ {
+ s = (guint32 *) srow;
+ o = (guint32 *) orow;
+ for (xx = x1; xx < x2; xx++)
+ {
+#ifdef LITTLE
+ *o++ = (*s++ >> 8) | 0xff000000;
+#else
+ *o++ = (*s++ << 8) | 0xff;
+#endif
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+static void
+rgb888msb (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *colormap)
+{
+ 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
+ */
+static void
+convert_real_slow (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ int x1,
+ int y1,
+ int x2,
+ int y2,
+ GdkColormap *cmap,
+ gboolean alpha)
+{
+ 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 >> 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 >> 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,
+ 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.
+ */
+static void
+rgbconvert (GdkImage *image,
+ guchar *pixels,
+ int rowstride,
+ gboolean alpha,
+ int x,
+ int y,
+ int width,
+ int height,
+ GdkColormap *cmap)
+{
+ 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->bits_per_pixel)
+ {
case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- case 6:
- case 7:
+ bank = 0;
+ break;
case 8:
- for (yy = 0; yy < height; yy++) {
- for (xx = 0; xx < width; xx++) {
- pixel = gdk_image_get_pixel (image, xx, yy);
- pixels[0] = colormap->colors[pixel].red;
- pixels[1] = colormap->colors[pixel].green;
- pixels[2] = colormap->colors[pixel].blue;
- if (with_alpha)
- pixels[3] = 0;
- pixels += fatness;
-
- }
- }
- break;
-
- case 16:
+ if (image->depth == 8)
+ bank = 1;
+ break;
+ }
+ break;
+ case GDK_VISUAL_TRUE_COLOR:
+ switch (image->depth)
+ {
case 15:
- for (yy = 0; yy < height; yy++) {
- for (xx = 0; xx < width; xx++) {
- pixel = gdk_image_get_pixel (image, xx, yy);
- r = (pixel >> 8) & 0xf8;
- g = (pixel >> 3) & 0xfc;
- b = (pixel << 3) & 0xf8;
- pixels[0] = r;
- pixels[1] = g;
- pixels[2] = b;
- if (with_alpha)
- pixels[3] = 0; /* GdkImages don't have alpha =) */
- pixels += fatness;
- }
- }
- break;
-
+ 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:
- for (yy = 0; yy < height; yy++) {
- for (xx = 0; xx < width; xx++) {
- pixel = gdk_image_get_pixel (image, xx, yy);
- r = (pixel >> 16) & 0xff;
- g = (pixel >> 8) & 0xff;
- b = pixel & 0xff;
- pixels[0] = r;
- pixels[1] = g;
- pixels[2] = b;
- if (with_alpha)
- pixels[3] = 0; /* GdkImages don't have alpha.. */
- pixels += fatness;
- }
- }
- break;
-
- default:
- g_error ("art_pixbuf_from_drawable_core (): Unknown depth.");
+ 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;
+ }
- art_pixbuf = with_alpha ? art_pixbuf_new_rgba (buff, width, height, rowstride) :
- art_pixbuf_new_rgb (buff, width, height, rowstride);
+ d (g_print ("converting using conversion function in bank %d\n", bank));
- return gdk_pixbuf_new(art_pixbuf, NULL);
+ 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);
+ }
}
-/* Public functions */
+/* Exported functions */
+
+/**
+ * gdk_pixbuf_get_from_drawable:
+ * @dest: (allow-none): Destination pixbuf, or %NULL if a new pixbuf should be created.
+ * @src: Source drawable.
+ * @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.
+ * @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 #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 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 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 memory can't be allocated for the return value, %NULL will be returned
+ * instead.
+ *
+ * (In short, there are several ways this function can fail, and if it fails
+ * it returns %NULL; so check the return value.)
+ *
+ * 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_rgb_from_drawable (GdkWindow *window, gint x, gint y, gint width, gint height)
+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)
{
- return gdk_pixbuf_from_drawable_core (window, x, y, width, height, 0);
-}
+ int src_width, src_height;
+ GdkImage *image;
+ int depth;
+ int x0, y0;
+
+ /* General sanity checks */
-GdkPixbuf *
-gdk_pixbuf_rgba_from_drawable (GdkWindow *window, gint x, gint y, gint width, gint height)
+ 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);
+ }
+ }
+
+ 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)
{
- return gdk_pixbuf_from_drawable_core (window, x, y, width, height, 1);
+ 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