http://bugs.freedesktop.org/show_bug.cgi?id=15269
Summary: R200 crashes in glXMakeCurrent if GL_FRAGMENT_SHADER_ATI
is enabled
Product: Mesa
Version: unspecified
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/r200
AssignedTo: dri-devel@lists.sourceforge.net
ReportedBy: [EMAIL PROTECTED]
Created an attachment (id=15570)
--> (http://bugs.freedesktop.org/attachment.cgi?id=15570)
Test demonstrating the problem
When making a context current that had GL_FRAGMENT_SHADER_ATI enabled, possibly
activated before the context was unset earlier, then Mesa crashes in
r200UpdateFragmentShader in r200_dri.so. The attached test program illustrates
this issue.
The sample program creates and activates a GL context using glut, enables
GL_FRAGMENT_SHADER_ATI, unsets the context and reactivates it. It can be
compiled with "gcc fragshader.c -o fragshader -lGL -lglut". Possibly the
GL_FRAGMENT_SHADER_ATI constant has to be defined if the OpenGL header does not
do so.
A workaround for this issue is to deactivate GL_FRAGMENT_SHADER_ATI before
unsetting a context, so reactivating it works. Afterwards
GL_FRAGMENT_SHADER_ATI can be safely reenabled. Existing fragment shaders work
correctly afterwards, and sharing them via display list sharing works correctly
as well.
The Mesa version is 7.0.2 according to glxinfo, bugzilla won't let me select
this version. The GL renderer string is "Mesa DRI R200 20060602 AGP 1x
x86/MMX/SSE2 TCL"
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