http://bugs.freedesktop.org/show_bug.cgi?id=20986
Summary: Incorrect tokens emitted for texgen planes in
emit_statevars, slang_builtin.c
Product: Mesa
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: [email protected]
ReportedBy: [email protected]
If you write a shader that uses the texgen planes, you will get complaints
about invalid state[0] or something like that.
I haven't cooked up a simple example program to trip this up, but it should not
be necessary, because there is obviously a problem with the code.
In src/mesa/shader/slang/slang_builtin.c:
In emit_statevar:
else if (strcmp(name, "gl_EyePlaneS") == 0) {
tokens[0] = STATE_TEXGEN_EYE_S;
}
...
else if (strcmp(name, "gl_ObjectPlaneQ") == 0) {
tokens[0] = STATE_TEXGEN_OBJECT_Q;
}
This is inconsistent with _mesa_fetch_state in
src/mesa/shader/prog_statevars.c.
My guess (not being familiar with the code) is that it should be
tokens[0] = STATE_TEXGEN;
tokens[2] = STATE_TEXGEN_EYE_S;
etc.
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