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
43 lines
925 B
C++
43 lines
925 B
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2005 Blender Foundation. All rights reserved. */
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/** \file
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* \ingroup gpu
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*
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* Generate shader code from the intermediate node graph.
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*/
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#pragma once
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#include "GPU_material.h"
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#include "GPU_shader.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct GPUNodeGraph;
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typedef struct GPUPass GPUPass;
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/* Pass */
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GPUPass *GPU_generate_pass(GPUMaterial *material,
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struct GPUNodeGraph *graph,
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GPUCodegenCallbackFn finalize_source_cb,
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void *thunk,
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bool optimize_graph);
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GPUShader *GPU_pass_shader_get(GPUPass *pass);
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bool GPU_pass_compile(GPUPass *pass, const char *shname);
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void GPU_pass_release(GPUPass *pass);
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bool GPU_pass_should_optimize(GPUPass *pass);
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/* Module */
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void gpu_codegen_init(void);
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void gpu_codegen_exit(void);
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#ifdef __cplusplus
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}
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#endif
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