X-Git-Url: https://git.brokenzipper.com/gitweb?a=blobdiff_plain;f=src%2Futil%2Fcommon.c;h=8e213fcf8b72c5308ca93dcfc99ea9b1e6fe7cd9;hb=462228f2e82c6e5f61baeb49b6358273728baa90;hp=c186d424fc66f42e52bceef06935f430069145d8;hpb=e8ee3c40c5d9f7f66a033e8492c34e282002e51d;p=chaz%2Ftint2

diff --git a/src/util/common.c b/src/util/common.c
index c186d42..8e213fc 100644
--- a/src/util/common.c
+++ b/src/util/common.c
@@ -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"
 
 
 
@@ -42,7 +44,9 @@ void copy_file(const char *pathSrc, const char *pathDest)
 	fileDest = fopen(pathDest, "wb");
 	if (fileDest == NULL) return;
 
-	while ((nb = fread(line, 1, 100, fileSrc)) > 0) fwrite(line, 1, nb, fileDest);
+	while ((nb = fread(line, 1, 100, fileSrc)) > 0)
+		if ( nb != fwrite(line, 1, nb, fileDest))
+			printf("Error while copying file %s to %s\n", pathSrc, pathDest);
 
 	fclose (fileDest);
 	fclose (fileSrc);
@@ -249,3 +253,23 @@ 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);
+}