http://bugs.freedesktop.org/show_bug.cgi?id=23724
Summary: sigsegv when readpixels from frontbuffer with i915
Product: Mesa
Version: 7.5
Platform: Other
URL: http://bugs.debian.org/545085
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/i915
AssignedTo: dri-devel@lists.sourceforge.net
ReportedBy: robert.wohl...@gmx.de
Created an attachment (id=29242)
--> (http://bugs.freedesktop.org/attachment.cgi?id=29242)
Test program
I've here a bigger program which worked in previous (cannot tell which) version
of this package, but currently it seems to crash when it calls glReadPixels. I
tried to create a similar testcase for the bug report and noticed that it
only(?) happened when I tried to read from frontbuffer. The simple test is
attached to this mail. It can be compiled with:
g++ -o readpixels_z readpixels_z.cpp `sdl-config --cflags` `sdl-config --libs`
-lGL -lGLU
Backtrace:
#0 0x00000000 in ?? ()
#1 0xb7729dba in _swrast_ReadPixels (ctx=0x64, x=0, y=0, width=100,
height=100, format=6407, type=5121, packing=0x809a40c, pixels=0xbfff7b98)
at swrast/s_readpix.c:605
#2 0xb7604c49 in intelReadPixels (ctx=0x808d530, x=0, y=0, width=100,
height=100, format=6407, type=5121, pack=0x809a40c, pixels=0xbfff7b98)
at intel_pixel_read.c:305
#3 0xb7794ec6 in _mesa_ReadPixels (x=0, y=0, width=100, height=100,
format=6407, type=5121, pixels=0xbfff7b98) at main/readpix.c:191
#4 0x08048e42 in Test_glReadPixels() ()
#5 0x0804908b in main ()
--- System information. ---
Architecture: i386
Kernel: Linux 2.6.31-rc5
Debian Release: squeeze/sid
libc6 2.9-26
libdrm-intel1 2.4.12-1
libdrm2 2.4.12-1
libexpat1 2.0.1-4
Hardware is a EeePC 1000h
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