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https://github.com/thorvg/thorvg.git
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a46af19ccb
* introduce a new class GlRenderPass to hold off-screen rendering result * add basic alpha composite support with begin/end render-pass
142 lines
4 KiB
C++
142 lines
4 KiB
C++
/*
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* Copyright (c) 2020 - 2023 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _TVG_GL_RENDER_TASK_H_
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#define _TVG_GL_RENDER_TASK_H_
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#include <memory>
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#include <vector>
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#include "tvgGlCommon.h"
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#include "tvgGlProgram.h"
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struct GlVertexLayout
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{
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uint32_t index;
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uint32_t size;
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uint32_t stride;
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size_t offset;
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};
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enum class GlBindingType
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{
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kUniformBuffer,
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kTexture,
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};
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struct GlBindingResource
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{
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GlBindingType type;
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/**
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* Binding point index.
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* Can be a uniform location for a texture
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* Can be a uniform buffer binding index for a uniform block
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*/
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uint32_t bindPoint = {};
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uint32_t location = {};
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GLuint gBufferId = {};
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uint32_t bufferOffset = {};
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uint32_t bufferRange = {};
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GlBindingResource() = default;
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GlBindingResource(uint32_t index, uint32_t location, uint32_t bufferId, uint32_t offset, uint32_t range)
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: type(GlBindingType::kUniformBuffer), bindPoint(index), location(location), gBufferId(bufferId), bufferOffset(offset), bufferRange(range)
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{
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}
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GlBindingResource(uint32_t bindPoint, uint32_t texId, uint32_t location)
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: type(GlBindingType::kTexture), bindPoint(bindPoint), location(location), gBufferId(texId)
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{
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}
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};
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class GlRenderTask
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{
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public:
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GlRenderTask(GlProgram* program): mProgram(program) {}
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virtual ~GlRenderTask() = default;
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virtual void run();
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void addVertexLayout(const GlVertexLayout& layout);
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void addBindResource(const GlBindingResource& binding);
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void setDrawRange(uint32_t offset, uint32_t count);
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void setViewport(const RenderRegion& viewport);
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GlProgram* getProgram() { return mProgram; }
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private:
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GlProgram* mProgram;
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RenderRegion mViewport = {};
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uint32_t mIndexOffset = {};
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uint32_t mIndexCount = {};
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Array<GlVertexLayout> mVertexLayout = {};
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Array<GlBindingResource> mBindingResources = {};
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};
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class GlComposeTask : public GlRenderTask
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{
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public:
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GlComposeTask(GlProgram* program, GLuint target, GLuint selfFbo, vector<unique_ptr<GlRenderTask>> tasks);
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~GlComposeTask() override = default;
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void run() override;
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protected:
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GLuint getTargetFbo() { return mTargetFbo; }
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GLuint getSelfFbo() { return mSelfFbo; }
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private:
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GLuint mTargetFbo;
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GLuint mSelfFbo;
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vector<unique_ptr<GlRenderTask>> mTasks;
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};
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class GlBlitTask : public GlComposeTask
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{
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public:
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GlBlitTask(GlProgram*, GLuint target, GLuint compose, vector<unique_ptr<GlRenderTask>> tasks);
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~GlBlitTask() override = default;
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void setSize(uint32_t width, uint32_t height);
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void run() override;
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private:
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uint32_t mWidth = 0;
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uint32_t mHeight = 0;
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};
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class GlDrawBlitTask : public GlComposeTask
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{
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public:
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GlDrawBlitTask(GlProgram*, GLuint target, GLuint compose, vector<unique_ptr<GlRenderTask>> tasks);
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~GlDrawBlitTask() override = default;
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void run() override;
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};
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#endif /* _TVG_GL_RENDER_TASK_H_ */
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