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#include "PixelBuffer.h" 18 19#include "Debug.h" 20#include "Extensions.h" 21#include "Properties.h" 22#include "renderstate/RenderState.h" 23#include "utils/GLUtils.h" 24 25#include <utils/Log.h> 26 27namespace android { 28namespace uirenderer { 29 30/////////////////////////////////////////////////////////////////////////////// 31// CPU pixel buffer 32/////////////////////////////////////////////////////////////////////////////// 33 34class CpuPixelBuffer: public PixelBuffer { 35public: 36 CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height); 37 38 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite) override; 39 40 uint8_t* getMappedPointer() const override; 41 42 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) override; 43 44protected: 45 void unmap() override; 46 47private: 48 std::unique_ptr<uint8_t[]> mBuffer; 49}; 50 51CpuPixelBuffer::CpuPixelBuffer(GLenum format, uint32_t width, uint32_t height) 52 : PixelBuffer(format, width, height) 53 , mBuffer(new uint8_t[width * height * formatSize(format)]) { 54} 55 56uint8_t* CpuPixelBuffer::map(AccessMode mode) { 57 if (mAccessMode == kAccessMode_None) { 58 mAccessMode = mode; 59 } 60 return mBuffer.get(); 61} 62 63void CpuPixelBuffer::unmap() { 64 mAccessMode = kAccessMode_None; 65} 66 67uint8_t* CpuPixelBuffer::getMappedPointer() const { 68 return mAccessMode == kAccessMode_None ? nullptr : mBuffer.get(); 69} 70 71void CpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) { 72 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, 73 mFormat, GL_UNSIGNED_BYTE, &mBuffer[offset]); 74} 75 76/////////////////////////////////////////////////////////////////////////////// 77// GPU pixel buffer 78/////////////////////////////////////////////////////////////////////////////// 79 80class GpuPixelBuffer: public PixelBuffer { 81public: 82 GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height); 83 ~GpuPixelBuffer(); 84 85 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite) 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 91protected: 92 void unmap() override; 93 94private: 95 GLuint mBuffer; 96 uint8_t* mMappedPointer; 97 Caches& mCaches; 98}; 99 100GpuPixelBuffer::GpuPixelBuffer(GLenum format, 101 uint32_t width, uint32_t height) 102 : PixelBuffer(format, width, height) 103 , mMappedPointer(nullptr) 104 , mCaches(Caches::getInstance()){ 105 glGenBuffers(1, &mBuffer); 106 107 mCaches.pixelBufferState().bind(mBuffer); 108 glBufferData(GL_PIXEL_UNPACK_BUFFER, getSize(), nullptr, GL_DYNAMIC_DRAW); 109 mCaches.pixelBufferState().unbind(); 110} 111 112GpuPixelBuffer::~GpuPixelBuffer() { 113 glDeleteBuffers(1, &mBuffer); 114} 115 116uint8_t* GpuPixelBuffer::map(AccessMode mode) { 117 if (mAccessMode == kAccessMode_None) { 118 mCaches.pixelBufferState().bind(mBuffer); 119 mMappedPointer = (uint8_t*) glMapBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, getSize(), mode); 120 if (CC_UNLIKELY(!mMappedPointer)) { 121 GLUtils::dumpGLErrors(); 122 LOG_ALWAYS_FATAL("Failed to map PBO"); 123 } 124 mAccessMode = mode; 125 mCaches.pixelBufferState().unbind(); 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 mCaches.pixelBufferState().unbind(); 156} 157 158/////////////////////////////////////////////////////////////////////////////// 159// Factory 160/////////////////////////////////////////////////////////////////////////////// 161 162PixelBuffer* PixelBuffer::create(GLenum format, 163 uint32_t width, uint32_t height, BufferType type) { 164 if (type == kBufferType_Auto && Caches::getInstance().gpuPixelBuffersEnabled) { 165 return new GpuPixelBuffer(format, width, height); 166 } 167 return new CpuPixelBuffer(format, width, height); 168} 169 170}; // namespace uirenderer 171}; // namespace android 172