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linker: Validate resource usage in the linker

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This is also done in ir_to_mesa and st_glsl_to_tgsi, but that code
will be removed soon.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Ian Romanick 2011-11-08 12:37:19 -08:00
parent 6ac895a664
commit 92f8159045
1 changed files with 44 additions and 0 deletions
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44
src/glsl/linker.cpp
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@ -1875,6 +1875,47 @@ store_tfeedback_info(struct gl_context *ctx, struct gl_shader_program *prog,
return true;
}
/**
* Validate the resources used by a program versus the implementation limits
*/
static bool
check_resources(struct gl_context *ctx, struct gl_shader_program *prog)
{
static const char *const shader_names[MESA_SHADER_TYPES] = {
"vertex", "fragment", "geometry"
};
const unsigned max_samplers[MESA_SHADER_TYPES] = {
ctx->Const.MaxVertexTextureImageUnits,
ctx->Const.MaxTextureImageUnits,
ctx->Const.MaxGeometryTextureImageUnits
};
const unsigned max_uniform_components[MESA_SHADER_TYPES] = {
ctx->Const.VertexProgram.MaxUniformComponents,
ctx->Const.FragmentProgram.MaxUniformComponents,
0 /* FINISHME: Geometry shaders. */
};
for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {
struct gl_shader *sh = prog->_LinkedShaders[i];
if (sh == NULL)
continue;
if (sh->num_samplers > max_samplers[i]) {
linker_error(prog, "Too many %s shader texture samplers",
shader_names[i]);
}
if (sh->num_uniform_components > max_uniform_components[i]) {
linker_error(prog, "Too many %s shader uniform components",
shader_names[i]);
}
}
return prog->LinkStatus;
}
void
link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
@ -2137,6 +2178,9 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
update_array_sizes(prog);
link_assign_uniform_locations(prog);
if (!check_resources(ctx, prog))
goto done;
/* OpenGL ES requires that a vertex shader and a fragment shader both be
* present in a linked program. By checking for use of shading language
* version 1.00, we also catch the GL_ARB_ES2_compatibility case.