1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "OpenGLRenderer" 18 19#include "PixelBuffer.h" 20 21#include "Debug.h" 22#include "Extensions.h" 23#include "Properties.h" 24#include "renderstate/RenderState.h" 25 26#include <utils/Log.h> 27 28namespace android { 29namespace uirenderer { 30 31/////////////////////////////////////////////////////////////////////////////// 32// CPU pixel buffer 33/////////////////////////////////////////////////////////////////////////////// 34 35class CpuPixelBuffer: public PixelBuffer { 36public: 37 CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height); 38 39 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite) override; 40 void unmap() override; 41 42 uint8_t* getMappedPointer() const override; 43 44 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) override; 45 46private: 47 std::unique_ptr<uint8_t[]> mBuffer; 48}; 49 50CpuPixelBuffer::CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height) 51 : PixelBuffer(format, width, height) 52 , mBuffer(new uint8_t[width * height * formatSize(format)]) { 53} 54 55uint8_t* CpuPixelBuffer::map(AccessMode mode) { 56 if (mAccessMode == kAccessMode_None) { 57 mAccessMode = mode; 58 } 59 return mBuffer.get(); 60} 61 62void CpuPixelBuffer::unmap() { 63 mAccessMode = kAccessMode_None; 64} 65 66uint8_t* CpuPixelBuffer::getMappedPointer() const { 67 return mAccessMode == kAccessMode_None ? nullptr : mBuffer.get(); 68} 69 70void CpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) { 71 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, 72 mFormat, GL_UNSIGNED_BYTE, &mBuffer[offset]); 73} 74 75/////////////////////////////////////////////////////////////////////////////// 76// GPU pixel buffer 77/////////////////////////////////////////////////////////////////////////////// 78 79class GpuPixelBuffer: public PixelBuffer { 80public: 81 GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height); 82 ~GpuPixelBuffer(); 83 84 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite) override; 85 void unmap() override; 86 87 uint8_t* getMappedPointer() const override; 88 89 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) override; 90 91private: 92 GLuint mBuffer; 93 uint8_t* mMappedPointer; 94 Caches& mCaches; 95}; 96 97GpuPixelBuffer::GpuPixelBuffer(GLenum format, 98 uint32_t width, uint32_t height) 99 : PixelBuffer(format, width, height) 100 , mMappedPointer(nullptr) 101 , mCaches(Caches::getInstance()){ 102 glGenBuffers(1, &mBuffer); 103 104 mCaches.pixelBufferState().bind(mBuffer); 105 glBufferData(GL_PIXEL_UNPACK_BUFFER, getSize(), nullptr, GL_DYNAMIC_DRAW); 106 mCaches.pixelBufferState().unbind(); 107} 108 109GpuPixelBuffer::~GpuPixelBuffer() { 110 glDeleteBuffers(1, &mBuffer); 111} 112 113uint8_t* GpuPixelBuffer::map(AccessMode mode) { 114 if (mAccessMode == kAccessMode_None) { 115 mCaches.pixelBufferState().bind(mBuffer); 116 mMappedPointer = (uint8_t*) glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, getSize(), mode); 117#if DEBUG_OPENGL 118 if (!mMappedPointer) { 119 GLenum status = GL_NO_ERROR; 120 while ((status = glGetError()) != GL_NO_ERROR) { 121 ALOGE("Could not map GPU pixel buffer: 0x%x", status); 122 } 123 } 124#endif 125 mAccessMode = mode; 126 } 127 128 return mMappedPointer; 129} 130 131void GpuPixelBuffer::unmap() { 132 if (mAccessMode != kAccessMode_None) { 133 if (mMappedPointer) { 134 mCaches.pixelBufferState().bind(mBuffer); 135 GLboolean status = glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); 136 if (status == GL_FALSE) { 137 ALOGE("Corrupted GPU pixel buffer"); 138 } 139 } 140 mAccessMode = kAccessMode_None; 141 mMappedPointer = nullptr; 142 } 143} 144 145uint8_t* GpuPixelBuffer::getMappedPointer() const { 146 return mMappedPointer; 147} 148 149void GpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) { 150 // If the buffer is not mapped, unmap() will not bind it 151 mCaches.pixelBufferState().bind(mBuffer); 152 unmap(); 153 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, mFormat, 154 GL_UNSIGNED_BYTE, reinterpret_cast<void*>(offset)); 155} 156 157/////////////////////////////////////////////////////////////////////////////// 158// Factory 159/////////////////////////////////////////////////////////////////////////////// 160 161PixelBuffer* PixelBuffer::create(GLenum format, 162 uint32_t width, uint32_t height, BufferType type) { 163 if (type == kBufferType_Auto && Caches::getInstance().gpuPixelBuffersEnabled) { 164 return new GpuPixelBuffer(format, width, height); 165 } 166 return new CpuPixelBuffer(format, width, height); 167} 168 169}; // namespace uirenderer 170}; // namespace android 171