87055dc71b
With the compute pipeline calculation can be offloaded to the GPU. This patch only adds the framework for compute. So no changes for users at this moment. NOTE: As this is an OpenGL4.3 feature it must always have a fallback. Use `GPU_compute_shader_support` to check if compute pipeline can be used. Check `gpu_shader_compute*` test cases for usage. This patch also adds support for shader storage buffer objects and device only vertex/index buffers. An alternative that had been discussed was adding this to the `GPUBatch`, this was eventually not chosen as it would lead to more code when used as part of a shading group. The idea is that we add an `eDRWCommandType` in the near future. Reviewed By: fclem Differential Revision: https://developer.blender.org/D10913
89 lines
2.8 KiB
C++
89 lines
2.8 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) 2020 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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#pragma once
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#include "MEM_guardedalloc.h"
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#include "glew-mx.h"
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#include "gpu_shader_private.hh"
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namespace blender {
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namespace gpu {
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/**
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* Implementation of shader compilation and uniforms handling using OpenGL.
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*/
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class GLShader : public Shader {
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private:
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/** Handle for full program (links shader stages below). */
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GLuint shader_program_ = 0;
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/** Individual shader stages. */
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GLuint vert_shader_ = 0;
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GLuint geom_shader_ = 0;
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GLuint frag_shader_ = 0;
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GLuint compute_shader_ = 0;
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/** True if any shader failed to compile. */
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bool compilation_failed_ = false;
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eGPUShaderTFBType transform_feedback_type_ = GPU_SHADER_TFB_NONE;
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public:
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GLShader(const char *name);
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~GLShader();
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/* Return true on success. */
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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(void) override;
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void transform_feedback_names_set(Span<const char *> name_list,
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const eGPUShaderTFBType geom_type) override;
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bool transform_feedback_enable(GPUVertBuf *buf) override;
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void transform_feedback_disable(void) override;
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void bind(void) override;
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void unbind(void) 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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void vertformat_from_shader(GPUVertFormat *format) const override;
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/* DEPRECATED: Kept only because of BGL API. */
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int program_handle_get(void) const override;
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private:
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char *glsl_patch_get(GLenum gl_stage);
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GLuint create_shader_stage(GLenum gl_stage, MutableSpan<const char *> sources);
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MEM_CXX_CLASS_ALLOC_FUNCS("GLShader");
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};
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} // namespace gpu
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} // namespace blender
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