glsl/linker: Propagate image uniform access qualifiers to the driver.
Reviewed-by: Paul Berry <stereotype441@gmail.com>
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@ -757,6 +757,40 @@ link_assign_uniform_block_offsets(struct gl_shader *shader)
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}
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}
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/**
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* Scan the program for image uniforms and store image unit access
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* information into the gl_shader data structure.
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*/
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static void
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link_set_image_access_qualifiers(struct gl_shader_program *prog)
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{
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for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
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gl_shader *sh = prog->_LinkedShaders[i];
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if (sh == NULL)
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continue;
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foreach_list(node, sh->ir) {
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ir_variable *var = ((ir_instruction *) node)->as_variable();
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if (var && var->data.mode == ir_var_uniform &&
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var->type->contains_image()) {
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unsigned id;
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bool found = prog->UniformHash->get(id, var->name);
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assert(found);
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const gl_uniform_storage *storage = &prog->UniformStorage[id];
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const unsigned index = storage->image[i].index;
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const GLenum access = (var->data.image.read_only ? GL_READ_ONLY :
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var->data.image.write_only ? GL_WRITE_ONLY :
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GL_READ_WRITE);
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for (unsigned j = 0; j < MAX2(1, storage->array_elements); ++j)
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sh->ImageAccess[index + j] = access;
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}
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}
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}
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}
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void
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link_assign_uniform_locations(struct gl_shader_program *prog)
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{
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@ -901,6 +935,7 @@ link_assign_uniform_locations(struct gl_shader_program *prog)
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prog->NumUserUniformStorage = num_user_uniforms;
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prog->UniformStorage = uniforms;
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link_set_image_access_qualifiers(prog);
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link_set_uniform_initializers(prog);
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return;
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