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workaround for NVidia 361.43 driver bug

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This driver returns internal/synthetic uniform shaders when
asked for the list of active uniforms. They all start with
"_main_" and have names like "_main_0_gp5fp[0]". We need to
ignore these, otherwise, Panda will later crash with failed
assertions when trying to set this unknown uniform.
This commit is contained in:
Dennis Brakhane 2016-01-03 16:13:51 +01:00
parent 1df9be6fc0
commit 9cb6903690
1 changed files with 9 additions and 0 deletions
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9
panda/src/glstuff/glShaderContext_src.cxx
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@ -687,6 +687,15 @@ reflect_uniform(int i, char *name_buffer, GLsizei name_buflen) {
_glgsg->_glGetActiveUniform(_glsl_program, i, name_buflen, NULL, &param_size, &param_type, name_buffer); _glgsg->_glGetActiveUniform(_glsl_program, i, name_buflen, NULL, &param_size, &param_type, name_buffer);
GLint p = _glgsg->_glGetUniformLocation(_glsl_program, name_buffer); GLint p = _glgsg->_glGetUniformLocation(_glsl_program, name_buffer);
// Some NVidia drivers (361.43 for example) (incorrectly) include "internal" uniforms in
// the list starting with "_main_" (for example, "_main_0_gp5fp[0]")
// we need to skip those, because we don't know anything about them
if (strncmp(name_buffer, "_main_", 6) == 0) {
GLCAT.warning() << "Ignoring uniform " << name_buffer << " which may be generated by buggy Nvidia driver.\n";
return;
}
if (GLCAT.is_debug()) { if (GLCAT.is_debug()) {
GLCAT.debug() GLCAT.debug()
<< "Active uniform " << name_buffer << " with size " << param_size << "Active uniform " << name_buffer << " with size " << param_size