Jason Fielder
7b9d1cb51f
Certain material node graphs can be very expensive to run. This feature aims to produce secondary GPUPass shaders within a GPUMaterial which provide optimal runtime performance. Such optimizations include baking constant data into the shader source directly, allowing the compiler to propogate constants and perform aggressive optimization upfront. As optimizations can result in reduction of shader editor and animation interactivity, optimized pass generation and compilation is deferred until all outstanding compilations have completed. Optimization is also delayed util a material has remained unmodified for a set period of time, to reduce excessive compilation. The original variant of the material shader is kept to maintain interactivity. Also adding a new concept to gpu::Shader allowing assignment of a parent shader from which a shader can pull PSO descriptors and any required metadata for asynchronous shader cache warming. This enables fully asynchronous shader optimization, without runtime hitching, while also reducing runtime hitching for standard materials, by using PSO descriptors from default materials, ahead of rendering. Further shader graph optimizations are likely also possible with this architecture. Certain scenes, such as Wanderer benefit significantly. Viewport performance for this scene is 2-3x faster on Apple-silicon based GPUs. Authored by Apple: Michael Parkin-White Ref T96261 Pull Request #104536
70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2022 Blender Foundation. All rights reserved. */
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/** \file
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* \ingroup gpu
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*/
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#pragma once
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#include "gpu_shader_private.hh"
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#include "vk_backend.hh"
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#include "vk_context.hh"
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#include "BLI_string_ref.hh"
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namespace blender::gpu {
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class VKShader : public Shader {
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private:
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VKContext *context_ = nullptr;
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VkShaderModule vertex_module_ = VK_NULL_HANDLE;
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VkShaderModule geometry_module_ = VK_NULL_HANDLE;
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VkShaderModule fragment_module_ = VK_NULL_HANDLE;
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VkShaderModule compute_module_ = VK_NULL_HANDLE;
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bool compilation_failed_ = false;
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Vector<VkPipelineShaderStageCreateInfo> pipeline_infos_;
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public:
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VKShader(const char *name);
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virtual ~VKShader();
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void vertex_shader_from_glsl(MutableSpan<const char *> sources) override;
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void geometry_shader_from_glsl(MutableSpan<const char *> sources) override;
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void fragment_shader_from_glsl(MutableSpan<const char *> sources) override;
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void compute_shader_from_glsl(MutableSpan<const char *> sources) override;
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bool finalize(const shader::ShaderCreateInfo *info = nullptr) override;
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void warm_cache(int limit) override{};
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void transform_feedback_names_set(Span<const char *> name_list,
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eGPUShaderTFBType geom_type) override;
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bool transform_feedback_enable(GPUVertBuf *) override;
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void transform_feedback_disable() override;
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void bind() override;
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void unbind() override;
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void uniform_float(int location, int comp_len, int array_size, const float *data) override;
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void uniform_int(int location, int comp_len, int array_size, const int *data) override;
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std::string resources_declare(const shader::ShaderCreateInfo &info) const override;
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std::string vertex_interface_declare(const shader::ShaderCreateInfo &info) const override;
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std::string fragment_interface_declare(const shader::ShaderCreateInfo &info) const override;
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std::string geometry_interface_declare(const shader::ShaderCreateInfo &info) const override;
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std::string geometry_layout_declare(const shader::ShaderCreateInfo &info) const override;
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std::string compute_layout_declare(const shader::ShaderCreateInfo &info) const override;
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/* DEPRECATED: Kept only because of BGL API. */
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int program_handle_get() const override;
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private:
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Vector<uint32_t> compile_glsl_to_spirv(Span<const char *> sources, shaderc_shader_kind kind);
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void build_shader_module(Span<uint32_t> spirv_module, VkShaderModule *r_shader_module);
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void build_shader_module(MutableSpan<const char *> sources,
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shaderc_shader_kind stage,
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VkShaderModule *r_shader_module);
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};
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} // namespace blender::gpu
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