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*fix* image rendering in real_transparency mode fixed (imlib_render_image does not work correctly)

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git-svn-id: http://tint2.googlecode.com/svn/trunk@318 121b4492-b84c-0410-8b4c-0d4edfb3f3cc
This commit is contained in:
Andreas.Fink85
2010-01-04 16:25:17 +00:00
parent 404d84afd3
commit 6cdf27ddfd
5 changed files with 45 additions and 31 deletions
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22
src/util/common.c
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@@ -21,12 +21,14 @@
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xrender.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
#include "server.h"
@@ -249,3 +251,23 @@ void createHeuristicMask(DATA32* data, int w, int h)
udata += 4;
}
}
void render_image(Drawable d, int x, int y, int w, int h)
{
// in real_transparency mode imlib_render_image_on_drawable does not the right thing, because
// the operation is IMLIB_OP_COPY, but we would need IMLIB_OP_OVER (which does not exist)
// Therefore we have to do it with the XRender extension (i.e. copy what imlib is doing internally)
// But first we need to render the image onto itself with PictOpIn to adjust the colors to the alpha channel
Pixmap pmap_tmp = XCreatePixmap(server.dsp, server.root_win, w, h, 32);
imlib_context_set_drawable(pmap_tmp);
imlib_context_set_blend(0);
imlib_render_image_on_drawable(0, 0);
Picture pict_image = XRenderCreatePicture(server.dsp, pmap_tmp, XRenderFindStandardFormat(server.dsp, PictStandardARGB32), 0, 0);
Picture pict_drawable = XRenderCreatePicture(server.dsp, d, XRenderFindVisualFormat(server.dsp, server.visual), 0, 0);
XRenderComposite(server.dsp, PictOpIn, pict_image, None, pict_image, 0, 0, 0, 0, 0, 0, w, h);
XRenderComposite(server.dsp, PictOpOver, pict_image, None, pict_drawable, 0, 0, 0, 0, x, y, w, h);
XFreePixmap(server.dsp, pmap_tmp);
XRenderFreePicture(server.dsp, pict_image);
XRenderFreePicture(server.dsp, pict_drawable);
}