160 lines
4.9 KiB
C++
160 lines
4.9 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "PixelBuffer.h"
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#include "Debug.h"
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#include "Extensions.h"
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#include "Properties.h"
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#include "renderstate/RenderState.h"
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#include "utils/GLUtils.h"
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#include <utils/Log.h>
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// CPU pixel buffer
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///////////////////////////////////////////////////////////////////////////////
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class CpuPixelBuffer: public PixelBuffer {
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public:
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CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height);
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uint8_t* map(AccessMode mode = kAccessMode_ReadWrite) override;
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void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) override;
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protected:
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void unmap() override;
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private:
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std::unique_ptr<uint8_t[]> mBuffer;
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};
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CpuPixelBuffer::CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height)
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: PixelBuffer(format, width, height)
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, mBuffer(new uint8_t[width * height * formatSize(format)]) {
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}
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uint8_t* CpuPixelBuffer::map(AccessMode mode) {
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if (mAccessMode == kAccessMode_None) {
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mAccessMode = mode;
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}
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return mBuffer.get();
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}
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void CpuPixelBuffer::unmap() {
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mAccessMode = kAccessMode_None;
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}
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void CpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) {
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glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height,
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mFormat, GL_UNSIGNED_BYTE, &mBuffer[offset]);
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}
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///////////////////////////////////////////////////////////////////////////////
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// GPU pixel buffer
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///////////////////////////////////////////////////////////////////////////////
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class GpuPixelBuffer: public PixelBuffer {
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public:
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GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height);
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~GpuPixelBuffer();
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uint8_t* map(AccessMode mode = kAccessMode_ReadWrite) override;
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void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) override;
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protected:
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void unmap() override;
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private:
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GLuint mBuffer;
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uint8_t* mMappedPointer;
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Caches& mCaches;
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};
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GpuPixelBuffer::GpuPixelBuffer(GLenum format,
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uint32_t width, uint32_t height)
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: PixelBuffer(format, width, height)
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, mMappedPointer(nullptr)
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, mCaches(Caches::getInstance()){
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glGenBuffers(1, &mBuffer);
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mCaches.pixelBufferState().bind(mBuffer);
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glBufferData(GL_PIXEL_UNPACK_BUFFER, getSize(), nullptr, GL_DYNAMIC_DRAW);
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mCaches.pixelBufferState().unbind();
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}
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GpuPixelBuffer::~GpuPixelBuffer() {
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glDeleteBuffers(1, &mBuffer);
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}
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uint8_t* GpuPixelBuffer::map(AccessMode mode) {
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if (mAccessMode == kAccessMode_None) {
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mCaches.pixelBufferState().bind(mBuffer);
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mMappedPointer = (uint8_t*) glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, getSize(), mode);
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if (CC_UNLIKELY(!mMappedPointer)) {
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GLUtils::dumpGLErrors();
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LOG_ALWAYS_FATAL("Failed to map PBO");
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}
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mAccessMode = mode;
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mCaches.pixelBufferState().unbind();
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}
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return mMappedPointer;
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}
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void GpuPixelBuffer::unmap() {
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if (mAccessMode != kAccessMode_None) {
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if (mMappedPointer) {
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mCaches.pixelBufferState().bind(mBuffer);
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GLboolean status = glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
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if (status == GL_FALSE) {
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ALOGE("Corrupted GPU pixel buffer");
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}
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}
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mAccessMode = kAccessMode_None;
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mMappedPointer = nullptr;
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}
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}
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void GpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) {
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// If the buffer is not mapped, unmap() will not bind it
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mCaches.pixelBufferState().bind(mBuffer);
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unmap();
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glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, mFormat,
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GL_UNSIGNED_BYTE, reinterpret_cast<void*>(offset));
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mCaches.pixelBufferState().unbind();
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}
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///////////////////////////////////////////////////////////////////////////////
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// Factory
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///////////////////////////////////////////////////////////////////////////////
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PixelBuffer* PixelBuffer::create(GLenum format,
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uint32_t width, uint32_t height, BufferType type) {
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if (type == kBufferType_Auto && Caches::getInstance().gpuPixelBuffersEnabled) {
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return new GpuPixelBuffer(format, width, height);
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}
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return new CpuPixelBuffer(format, width, height);
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}
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}; // namespace uirenderer
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}; // namespace android
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