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If the pixbuf has an alpha channel, use gdk_draw_rgb_32_image to draw it

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2008-02-07  Christian Persch  <chpe@gnome.org>

	* gdk/gdkpixbuf-render.c:
	(gdk_pixbuf_render_pixmap_and_mask_for_colormap): If the pixbuf has an
	alpha channel, use gdk_draw_rgb_32_image to draw it to the pixmap;
	otherwise there will be random pixel values in the semi-transparent
	area of the pixbuf within the mask. Bug #487865.

svn path=/trunk/; revision=19488
This commit is contained in:
Christian Persch
2008-02-06 23:08:07 +00:00
committed by Christian Persch
parent 6e03989a4c
commit 08856e5af9
2 changed files with 26 additions and 5 deletions
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23
gdk/gdkpixbuf-render.c
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@ -305,11 +305,24 @@ gdk_pixbuf_render_pixmap_and_mask_for_colormap (GdkPixbuf *pixbuf,
gdk_drawable_set_colormap (GDK_DRAWABLE (*pixmap_return), colormap);
gc = _gdk_drawable_get_scratch_gc (*pixmap_return, FALSE);
gdk_draw_pixbuf (*pixmap_return, gc, pixbuf,
0, 0, 0, 0,
gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
GDK_RGB_DITHER_NORMAL,
0, 0);
/* If the pixbuf has an alpha channel, using gdk_pixbuf_draw would give
* random pixel values in the area that are within the mask, but semi-
* transparent. So we treat the pixbuf like a pixbuf without alpha channel;
* see bug #487865.
*/
if (gdk_pixbuf_get_has_alpha (pixbuf))
gdk_draw_rgb_32_image (*pixmap_return, gc,
0, 0,
gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
GDK_RGB_DITHER_NORMAL,
gdk_pixbuf_get_pixels (pixbuf), gdk_pixbuf_get_rowstride (pixbuf));
else
gdk_draw_pixbuf (*pixmap_return, gc, pixbuf,
0, 0, 0, 0,
gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
GDK_RGB_DITHER_NORMAL,
0, 0);
}
if (mask_return)