8fb2ff458b
This is a first part of the Shader Create Info system could be.
A shader create info provides a way to define shader structure, resources
and interfaces. This makes for a quick way to provide backend agnostic
binding informations while also making shader variations easy to declare.
- Clear source input (only one file). Cleans up the GPU api since we can create a
shader from one descriptor
- Resources and interfaces are generated by the backend (much simpler than parsing).
- Bindings are explicit from position in the array.
- GPUShaderInterface becomes a trivial translation of enums and string copy.
- No external dependency to third party lib.
- Cleaner code, less fragmentation of resources in several libs.
- Easy to modify / extend at runtime.
- no parser involve, very easy to code.
- Does not hold any data, can be static and kept on disc.
- Could hold precompiled bytecode for static shaders.
This also includes a new global dependency system.
GLSL shaders can include other sources by using #pragma BLENDER_REQUIRE(...).
This patch already migrated several builtin shaders. Other shaders should be migrated
one at a time, and could be done inside master.
There is a new compile directive `WITH_GPU_SHADER_BUILDER` this is an optional
directive for linting shaders to increase turn around time.
What is remaining:
- pyGPU API {T94975}
- Migration of other shaders. This could be a community effort.
Reviewed By: jbakker
Maniphest Tasks: T94975
Differential Revision: https://developer.blender.org/D13360
103 lines
2.3 KiB
C++
103 lines
2.3 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2021 Blender Foundation.
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* All rights reserved.
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*/
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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 "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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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);
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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_backend_exit();
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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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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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exit_code = 1;
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}
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builder.exit();
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exit(exit_code);
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return exit_code;
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}
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