http://bugs.freedesktop.org/show_bug.cgi?id=11909
Summary: GL_PACK_SWAP_BYTES dosen't work, when reading back from
stencil buffer in GL_INT format
Product: Mesa
Version: CVS
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: dri-devel@lists.sourceforge.net
use glPixelStorei to set GL_PACK_SWAP_BYTES to GL_FALSE
draw a group of values into stencil buffer,
then, use glPixelStorei to set GL_PACK_SWAP_BYTES to GL_TRUE
read back values from buffer, the byte order is not as expected.
The following patch should fix this:
--- src/mesa/main/image.c 2007-08-05 20:06:34.000000000 +0800
+++ src/mesa/main/b.c 2007-08-09 13:23:01.000000000 +0800
@@ -3794,7 +3794,7 @@
GLint *dst = (GLint *) dest;
GLuint i;
for (i=0;i<n;i++) {
- *dst++ = (GLint) source[i];
+ dst[i] = (GLint) source[i];
}
if (dstPacking->SwapBytes) {
_mesa_swap4( (GLuint *) dst, n );
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