3655eb7ff0
Add command line argument to switch gpu backend. Add `--gpu-backend` option to override the gpu backend selected by Blender. Values for this option that will be available in releases for now are: * opengl: Force blender to select OpenGL backend. During development and depending on compile options additional values can exist: * metal: Force Blender to select Metal backend. When this option isn't provided the internal logic for GPU backend selection will be used. Note that this is at the time of writing the same as always selecting the opengl backend. Reviewed By: fclem, brecht, MichaelPW Differential Revision: https://developer.blender.org/D16297
123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2021 Blender Foundation. All rights reserved. */
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/** \file
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* \ingroup gpu
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*
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* Compile time automation of shader compilation and validation.
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*/
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#include <iostream>
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#include "GHOST_C-api.h"
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#include "GPU_context.h"
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#include "GPU_init_exit.h"
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#include "gpu_shader_create_info_private.hh"
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#include "BLI_vector.hh"
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#include "CLG_log.h"
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namespace blender::gpu::shader_builder {
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class ShaderBuilder {
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private:
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GHOST_SystemHandle ghost_system_;
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GHOST_ContextHandle ghost_context_;
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GPUContext *gpu_context_ = nullptr;
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public:
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void init();
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bool bake_create_infos();
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void exit();
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};
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bool ShaderBuilder::bake_create_infos()
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{
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return gpu_shader_create_info_compile_all();
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}
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void ShaderBuilder::init()
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{
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CLG_init();
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GHOST_GLSettings glSettings = {0};
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switch (GPU_backend_type_selection_get()) {
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case GPU_BACKEND_OPENGL:
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glSettings.context_type = GHOST_kDrawingContextTypeOpenGL;
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break;
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#ifdef WITH_METAL_BACKEND
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case GPU_BACKEND_METAL:
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glSettings.context_type = GHOST_kDrawingContextTypeMetal;
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break;
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#endif
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default:
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BLI_assert_unreachable();
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break;
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}
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ghost_system_ = GHOST_CreateSystem();
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ghost_context_ = GHOST_CreateOpenGLContext(ghost_system_, glSettings);
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GHOST_ActivateOpenGLContext(ghost_context_);
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gpu_context_ = GPU_context_create(nullptr, ghost_context_);
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GPU_init();
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}
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void ShaderBuilder::exit()
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{
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GPU_exit();
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GPU_context_discard(gpu_context_);
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GHOST_DisposeOpenGLContext(ghost_system_, ghost_context_);
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GHOST_DisposeSystem(ghost_system_);
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CLG_exit();
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}
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} // namespace blender::gpu::shader_builder
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/** \brief Entry point for the shader_builder. */
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int main(int argc, const char *argv[])
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{
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if (argc < 2) {
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printf("Usage: %s <data_file_to>\n", argv[0]);
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exit(1);
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}
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int exit_code = 0;
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struct NamedBackend {
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std::string name;
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eGPUBackendType backend;
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};
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blender::Vector<NamedBackend> backends_to_validate;
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backends_to_validate.append({"OpenGL", GPU_BACKEND_OPENGL});
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#ifdef WITH_METAL_BACKEND
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backends_to_validate.append({"Metal", GPU_BACKEND_METAL});
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#endif
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for (NamedBackend &backend : backends_to_validate) {
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GPU_backend_type_selection_set(backend.backend);
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if (!GPU_backend_supported()) {
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printf("%s isn't supported on this platform. Shader compilation is skipped\n",
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backend.name.c_str());
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continue;
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}
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blender::gpu::shader_builder::ShaderBuilder builder;
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builder.init();
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if (!builder.bake_create_infos()) {
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printf("Shader compilation failed for %s backend\n", backend.name.c_str());
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exit_code = 1;
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}
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builder.exit();
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exit(exit_code);
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}
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return exit_code;
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}
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