* 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.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <config.h>
-#include <stdio.h>
-#include <string.h>
-#include "gdk.h" /* For gdk_screen_width/gdk_screen_height */
+#include "config.h"
+
+#include "gdkpixbuf.h"
+
#include "gdkcolor.h"
-#include "gdkimage.h"
-#include "gdkvisual.h"
#include "gdkwindow.h"
-#include "gdkpixbuf.h"
-#include "gdk-pixbuf-private.h"
#include "gdkinternals.h"
-#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
-#define LITTLE
-#endif
-#define d(x)
-
-\f
+#include <gdk-pixbuf/gdk-pixbuf.h>
-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
-};
-
-\f
-
-/*
- * convert bitmap data to pixbuf without alpha,
- * without using a colormap
+/**
+ * SECTION:pixbufs
+ * @Short_description: Functions for obtaining pixbufs
+ * @Title: Pixbufs
+ *
+ * Pixbufs are client-side images. For details on how to create
+ * and manipulate pixbufs, see the #GdkPixbuf API documentation.
+ *
+ * The functions described here allow to obtain pixbufs from
+ * #GdkWindows and cairo surfaces.
*/
-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
+/**
+ * gdk_pixbuf_get_from_window:
+ * @window: Source window
+ * @src_x: Source X coordinate within @window
+ * @src_y: Source Y coordinate within @window
+ * @width: Width in pixels of region to get
+ * @height: Height in pixels of region to get
+ *
+ * Transfers image data from a #GdkWindow 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.
+ *
+ * This function will create an RGB pixbuf with 8 bits per channel with
+ * the same size specified by the @width and @height arguments. The pixbuf
+ * will contain an alpha channel if the @window contains one.
+ *
+ * If 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 window 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.)
+ *
+ * Return value: (transfer full): A newly-created pixbuf with a reference
+ * count of 1, or %NULL on error
*/
-static void
-bitmap1a (GdkImage *image,
- guchar *pixels,
- int rowstride,
- int x1,
- int y1,
- int x2,
- int y2)
+GdkPixbuf *
+gdk_pixbuf_get_from_window (GdkWindow *src,
+ gint src_x,
+ gint src_y,
+ gint width,
+ gint height)
{
- int xx, yy;
- int bpl;
- register guint8 data;
- guint8 *o;
- guint8 *srow = (guint8*)image->mem + y1 * image->bpl, *orow = pixels;
+ cairo_surface_t *surface;
+ GdkPixbuf *dest;
- d (printf ("bitmap, with alpha\n"));
+ g_return_val_if_fail (GDK_IS_WINDOW (src), NULL);
+ g_return_val_if_fail (gdk_window_is_viewable (src), NULL);
- bpl = image->bpl;
+ surface = _gdk_window_ref_cairo_surface (src);
+ dest = gdk_pixbuf_get_from_surface (surface,
+ src_x, src_y,
+ width, height);
+ cairo_surface_destroy (surface);
- 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;
- }
+ return dest;
}
-/*
- * 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)
+static cairo_format_t
+gdk_cairo_format_for_content (cairo_content_t content)
{
- 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++)
+ switch (content)
{
- 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;
- *o++ = colormap->colors[data].green;
- *o++ = colormap->colors[data].blue;
- }
- srow += bpl;
- orow += rowstride;
+ case CAIRO_CONTENT_COLOR:
+ return CAIRO_FORMAT_RGB24;
+ case CAIRO_CONTENT_ALPHA:
+ return CAIRO_FORMAT_A8;
+ case CAIRO_CONTENT_COLOR_ALPHA:
+ default:
+ return CAIRO_FORMAT_ARGB32;
}
}
-/*
- * 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)
+static cairo_surface_t *
+gdk_cairo_surface_coerce_to_image (cairo_surface_t *surface,
+ cairo_content_t content,
+ int src_x,
+ int src_y,
+ int width,
+ int height)
{
- 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"));
+ cairo_surface_t *copy;
+ cairo_t *cr;
- /* 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;
+ copy = cairo_image_surface_create (gdk_cairo_format_for_content (content),
+ width,
+ height);
- 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)));
+ cr = cairo_create (copy);
+ cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+ cairo_set_source_surface (cr, surface, -src_x, -src_y);
+ cairo_paint (cr);
+ cairo_destroy (cr);
- *o++ = colormap->colors[data].red;
- *o++ = colormap->colors[data].green;
- *o++ = colormap->colors[data].blue;
- *o++ = 255;
- }
- srow += bpl;
- orow += rowstride;
- }
+ return copy;
}
-/*
- * 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)
+convert_alpha (guchar *dest_data,
+ int dest_stride,
+ guchar *src_data,
+ int src_stride,
+ int src_x,
+ int src_y,
+ int width,
+ int height)
{
- 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;
+ int x, y;
- bpl = image->bpl;
+ src_data += src_stride * src_y + src_x * 4;
- d (printf ("8 bit, no alpha output\n"));
+ for (y = 0; y < height; y++) {
+ guint32 *src = (guint32 *) src_data;
- mask = mask_table[image->depth];
+ for (x = 0; x < width; x++) {
+ guint alpha = src[x] >> 24;
- for (yy = y1; yy < y2; yy++)
- {
- s = srow;
- o = orow;
- for (xx = x1; xx < x2; xx++)
+ if (alpha == 0)
{
- data = *s++ & mask;
- *o++ = colormap->colors[data].red;
- *o++ = colormap->colors[data].green;
- *o++ = colormap->colors[data].blue;
+ dest_data[x * 4 + 0] = 0;
+ dest_data[x * 4 + 1] = 0;
+ dest_data[x * 4 + 2] = 0;
}
- 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 << 16
- | colormap->colors[xx].green << 8
- | colormap->colors[xx].red;
-#else
- remap[xx] = 0xff
- | colormap->colors[xx].red << 24
- | colormap->colors[xx].green << 16
- | colormap->colors[xx].blue << 8;
-#endif
- }
-
- for (yy = 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;
- }
-}
-
-/*
- * 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;
-
-#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 = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
-
- bpl = image->bpl;
-
- for (yy = y1; yy < y2; yy++)
- {
-#ifdef LITTLE
- s = (guint32 *) srow;
-#else
- s = srow;
-#endif
- o = (guint16 *) orow;
-
- /* check for first pixel odd */
- xx = x1;
- if (xx & 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);
- o = (guint16 *) (((char *) o) + 3);
- ++xx;
- }
-
- g_assert (!(xx & 1));
-
- /* if x2 is even, then the -1 does nothing to number of
- * loop iterations, if x2 is odd then the -1 reduces
- * iterations by one
- */
- for (; xx < (x2 - 1); 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[1] | s[0] << 8 | s[3] << 16 | s[2] << 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 (x2 & 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;
- }
-}
-
-/*
- * 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;
-
-#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 = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
-
- bpl = image->bpl;
-
- for (yy = y1; yy < y2; yy++)
- {
-#ifdef LITTLE
- s = srow;
-#else
- s = (guint32 *) srow;
-#endif
- o = (guint16 *) orow;
-
- xx = x1;
-
- /* check for first pixel odd */
- if (xx & 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 >> 8) & 0xf8) | ((data >> 13) & 0x7);
- ((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3);
- ((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7);
-
- o = (guint16 *) (((char *) o) + 3);
- ++xx;
- }
-
- g_assert (!(xx & 1));
-
- /* if x2 is even, then the -1 does nothing to number of
- * loop iterations, if x2 is odd then the -1 reduces
- * iterations by one
- */
- for (; xx < (x2 - 1); xx += 2)
- {
- register guint32 data;
-#ifdef LITTLE
- /* swap endianness first */
- data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 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 (x2 & 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 >> 8) & 0xf8) | ((data >> 13) & 0x7);
- ((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3);
- ((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7);
- }
- srow += bpl;
- orow += rowstride;
- }
-}
-
-/*
- * convert 16 bits/pixel data
- * with alpha
- * data in lsb format
- */
-static void
-rgb565alsb (GdkImage *image,
- guchar *pixels,
- int rowstride,
- int x1,
- int y1,
- int x2,
- int y2,
- GdkColormap *colormap)
-{
- int xx, yy;
- int bpl;
-
-#ifdef LITTLE
- register guint16 *s; /* read 1 pixels at once */
-#else
- register guint8 *s;
-#endif
- 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++)
- {
-#ifdef LITTLE
- s = (guint16 *) srow;
-#else
- s = (guint8 *) srow;
-#endif
- o = (guint32 *) orow;
- for (xx = x1; xx < x2; xx ++)
- {
- register guint32 data;
- /* rrrrrggg gggbbbbb -> rrrrrRRR ggggggGG bbbbbBBB aaaaaaaa */
- /* little endian: aaaaaaaa bbbbbBBB ggggggGG rrrrrRRR */
-#ifdef LITTLE
- data = *s++;
- *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
- | (data & 0x7e0) << 5 | (data & 0x600) >> 1
- | (data & 0x1f) << 19 | (data & 0x1c) << 14
- | 0xff000000;
-#else
- /* swap endianness first */
- data = s[0] | s[1] << 8;
- s += 2;
- *o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
- | (data & 0x7e0) << 13 | (data & 0x600) << 7
- | (data & 0x1f) << 11 | (data & 0x1c) << 6
- | 0xff;
-#endif
- }
- srow += bpl;
- orow += rowstride;
- }
-}
-
-/*
- * convert 16 bits/pixel data
- * with alpha
- * data in msb format
- */
-static void
-rgb565amsb (GdkImage *image,
- guchar *pixels,
- int rowstride,
- int x1,
- int y1,
- int x2,
- int y2,
- GdkColormap *colormap)
-{
- int xx, yy;
- int bpl;
-
-#ifdef LITTLE
- register guint8 *s;
-#else
- register guint16 *s; /* read 1 pixels at once */
-#endif
- 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 = srow;
- o = (guint32 *) orow;
- for (xx = x1; xx < x2; xx ++)
- {
- register guint32 data;
- /* rrrrrggg gggbbbbb -> rrrrrRRR gggggg00 bbbbbBBB aaaaaaaa */
- /* little endian: aaaaaaaa bbbbbBBB gggggg00 rrrrrRRR */
-#ifdef LITTLE
- /* swap endianness first */
- data = s[0] | s[1] << 8;
- s += 2;
- *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
- | (data & 0x7e0) << 5 | (data & 0x600) >> 1
- | (data & 0x1f) << 19 | (data & 0x1c) << 14
- | 0xff000000;
-#else
- data = *s++;
- *o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
- | (data & 0x7e0) << 13 | (data & 0x600) << 7
- | (data & 0x1f) << 11 | (data & 0x1c) << 6
- | 0xff;
-#endif
- }
- srow += bpl;
- orow += rowstride;
- }
-}
-
-/*
- * convert 15 bits/pixel data
- * no alpha
- * data in lsb format
- */
-static void
-rgb555lsb (GdkImage *image,
- guchar *pixels,
- int rowstride,
- int x1,
- int y1,
- int x2,
- int y2,
- GdkColormap *colormap)
-{
- int xx, yy;
- 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 = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
-
- bpl = image->bpl;
-
- for (yy = y1; yy < y2; yy++)
- {
-#ifdef LITTLE
- s = (guint32 *) srow;
-#else
- s = srow;
-#endif
- o = (guint16 *) orow;
-
- xx = x1;
-
- /* check for first odd pixel */
- if (xx & 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;
- o = (guint16 *) (((char *) o) + 3);
- ++xx;
- }
-
- g_assert (!(xx & 1));
-
- /* if x2 is even, then the -1 does nothing to number of
- * loop iterations, if x2 is odd then the -1 reduces
- * iterations by one
- */
- for (; xx < (x2 - 1); 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[1] | s[0] << 8 | s[3] << 16 | s[2] << 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 (x2 & 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;
- }
-}
-
-/*
- * 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;
-
-#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 = (guint8*)image->mem + y1 * image->bpl + x1 * image->bpp, *orow = pixels;
-
- bpl = image->bpl;
-
- for (yy = y1; yy < y2; yy++)
- {
- s = srow;
- o = (guint16 *) orow;
-
- xx = x1;
- /* See if first pixel is odd */
- if (xx & 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;
-
- o = (guint16 *) (((char *) o) + 3);
- ++xx;
- }
-
- g_assert (!(xx & 1));
-
- /* if x2 is even, then the -1 does nothing to number of
- * loop iterations, if x2 is odd then the -1 reduces
- * iterations by one
- */
- for (; xx < (x2 - 1); xx += 2)
- {
- register guint32 data;
-#ifdef LITTLE
- /* swap endianness first */
- data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 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 (x2 & 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;
- }
-}
-
-/*
- * 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;
-
-#ifdef LITTLE
- register guint16 *s; /* read 1 pixels at once */
-#else
- register guint8 *s;
-#endif
- 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++)
- {
-#ifdef LITTLE
- s = (guint16 *) srow;
-#else
- s = srow;
-#endif
- o = (guint32 *) orow;
- for (xx = x1; xx < x2; xx++)
- {
- register guint32 data;
- /* rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */
- /* little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */
-#ifdef LITTLE
- data = *s++;
- *o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
- | (data & 0x3e0) << 6 | (data & 0x380) << 1
- | (data & 0x1f) << 19 | (data & 0x1c) << 14
- | 0xff000000;
-#else
- /* swap endianness first */
- data = s[0] | s[1] << 8;
- s += 2;
- *o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12
- | (data & 0x3e0) << 14 | (data & 0x380) << 9
- | (data & 0x1f) << 11 | (data & 0x1c) << 6
- | 0xff;
-#endif
- }
- srow += bpl;
- orow += rowstride;
- }
-}
-
-/*
- * convert 15 bits/pixel data
- * with alpha
- * data in msb format
- */
-static void
-rgb555amsb (GdkImage *image,
- guchar *pixels,
- int rowstride,
- int x1,
- int y1,
- int x2,
- int y2,
- GdkColormap *colormap)
-{
- int xx, yy;
- int bpl;
-
-#ifdef LITTLE
- register guint16 *s; /* read 1 pixels at once */
-#else
- register guint8 *s;
-#endif
- 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++)
- {
-#ifdef LITTLE
- s = (guint16 *) srow;
-#else
- s = srow;
-#endif
- o = (guint32 *) orow;
- for (xx = x1; xx < x2; 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;
- }
-}
-
-
-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;
-#ifdef LITTLE
- guint32 *o;
- guint32 *s;
-#else
- guint8 *s; /* for byte order swapping */
- guint8 *o;
-#endif
-
- d (printf ("32 bit, msb, with alpha\n"));
-
- bpl = image->bpl;
-
- /* msb data */
- for (yy = y1; yy < y2; yy++)
- {
-#ifdef LITTLE
- s = (guint32 *) srow;
- o = (guint32 *) orow;
-#else
- s = srow;
- o = orow;
-#endif
- for (xx = x1; xx < x2; 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;
+ else
+ {
+ dest_data[x * 4 + 0] = (((src[x] & 0xff0000) >> 16) * 255 + alpha / 2) / alpha;
+ dest_data[x * 4 + 1] = (((src[x] & 0x00ff00) >> 8) * 255 + alpha / 2) / alpha;
+ dest_data[x * 4 + 2] = (((src[x] & 0x0000ff) >> 0) * 255 + alpha / 2) / alpha;
+ }
+ dest_data[x * 4 + 3] = alpha;
}
-}
-
-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;
- }
+ src_data += src_stride;
+ dest_data += dest_stride;
+ }
}
-/*
- * 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)
+convert_no_alpha (guchar *dest_data,
+ int dest_stride,
+ guchar *src_data,
+ int src_stride,
+ int src_x,
+ int src_y,
+ int width,
+ int height)
{
- int xx, yy;
- int bpl;
- guint8 *orow = pixels;
- guint8 *o;
- guint32 pixel;
- GdkVisual *v;
- guint8 component;
- int i;
-
- bpl = image->bpl;
- v = gdk_colormap_get_visual(cmap);
+ int x, y;
- 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));
+ src_data += src_stride * src_y + src_x * 4;
- 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:
- /* 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;
- }
- orow += rowstride;
- }
-}
-
-typedef void (* cfunc) (GdkImage *image,
- guchar *pixels,
- int rowstride,
- int x1,
- int y1,
- int x2,
- int y2,
- 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
-};
-
-/*
- * 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;
+ for (y = 0; y < height; y++) {
+ guint32 *src = (guint32 *) src_data;
- 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);
- 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:
- bank = 0;
- break;
- case 8:
- if (image->depth == 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->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;
+ for (x = 0; x < width; x++) {
+ dest_data[x * 3 + 0] = src[x] >> 16;
+ dest_data[x * 3 + 1] = src[x] >> 8;
+ dest_data[x * 3 + 2] = src[x];
}
- 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);
- }
+ src_data += src_stride;
+ dest_data += dest_stride;
+ }
}
-
-/* Exported functions */
-
/**
- * gdk_pixbuf_get_from_drawable:
- * @dest: Destination pixbuf, or %NULL if a new pixbuf should be created.
- * @src: Source drawable.
- * @cmap: A colormap if @src 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.
+ * gdk_pixbuf_get_from_surface:
+ * @surface: surface to copy from
+ * @src_x: Source X coordinate within @surface
+ * @src_y: Source Y coordinate within @surface
+ * @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).
+ * Transfers image data from a #cairo_surface_t and converts it to an RGB(A)
+ * representation inside a #GdkPixbuf. This allows you to efficiently read
+ * individual pixels from cairo surfaces. For #GdkWindows, use
+ * gdk_pixbuf_get_from_window() instead.
*
- * 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.
+ * This function will create an RGB pixbuf with 8 bits per channel.
+ * The pixbuf will contain an alpha channel if the @surface contains one.
*
- * 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
- **/
+ * Return value: (transfer full): A newly-created pixbuf with a reference
+ * count of 1, or %NULL on error
+ */
GdkPixbuf *
-gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
- GdkDrawable *src,
- GdkColormap *cmap,
- int src_x, int src_y,
- int dest_x, int dest_y,
- int width, int height)
+gdk_pixbuf_get_from_surface (cairo_surface_t *surface,
+ gint src_x,
+ gint src_y,
+ gint width,
+ gint height)
{
- int src_width, src_height;
- GdkImage *image;
- int depth;
- int x0, y0;
-
- /* General sanity checks */
-
- g_return_val_if_fail (src != NULL, NULL);
+ cairo_content_t content;
+ GdkPixbuf *dest;
- 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 (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);
- }
-
- /* Create the pixbuf if needed */
- if (!dest)
- {
- dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
- if (dest == NULL)
- return 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;
- }
-
- /* 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);
- }
-
- 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);
- }
-
- 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 (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: Destination pixbuf, or %NULL if a new pixbuf should be created.
- * @src: Source #GdkImage.
- * @cmap: 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 (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);
- }
-
- 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);
+ g_return_val_if_fail (surface != NULL, NULL);
+ g_return_val_if_fail (width > 0 && height > 0, NULL);
+
+ content = cairo_surface_get_content (surface) | CAIRO_CONTENT_COLOR;
+ dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+ !!(content & CAIRO_CONTENT_ALPHA),
+ 8,
+ width, height);
+
+ surface = gdk_cairo_surface_coerce_to_image (surface, content,
+ src_x, src_y,
+ width, height);
+ cairo_surface_flush (surface);
+ if (cairo_surface_status (surface) || dest == NULL)
+ {
+ cairo_surface_destroy (surface);
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 <= dest->width, NULL);
- g_return_val_if_fail (dest_y + height <= dest->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;
- }
-
- 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 (src, dest->pixels +
- (dest_y * rowstride) + (dest_x * bpp),
- rowstride,
- alpha,
- src_x, src_y,
- width,
- height,
- cmap);
-
+ if (gdk_pixbuf_get_has_alpha (dest))
+ convert_alpha (gdk_pixbuf_get_pixels (dest),
+ gdk_pixbuf_get_rowstride (dest),
+ cairo_image_surface_get_data (surface),
+ cairo_image_surface_get_stride (surface),
+ 0, 0,
+ width, height);
+ else
+ convert_no_alpha (gdk_pixbuf_get_pixels (dest),
+ gdk_pixbuf_get_rowstride (dest),
+ cairo_image_surface_get_data (surface),
+ cairo_image_surface_get_stride (surface),
+ 0, 0,
+ width, height);
+
+ cairo_surface_destroy (surface);
return dest;
}
projects / ~andy / gtk / blobdiff