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 27 namespace android { 28 namespace uirenderer { 29 30 /////////////////////////////////////////////////////////////////////////////// 31 // CPU pixel buffer 32 /////////////////////////////////////////////////////////////////////////////// 33 34 class CpuPixelBuffer: public PixelBuffer { 35 public: 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 44 protected: 45 void unmap() override; 46 47 private: 48 std::unique_ptr<uint8_t[]> mBuffer; 49 }; 50 51 CpuPixelBuffer::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 56 uint8_t* CpuPixelBuffer::map(AccessMode mode) { 57 if (mAccessMode == kAccessMode_None) { 58 mAccessMode = mode; 59 } 60 return mBuffer.get(); 61 } 62 63 void CpuPixelBuffer::unmap() { 64 mAccessMode = kAccessMode_None; 65 } 66 67 uint8_t* CpuPixelBuffer::getMappedPointer() const { 68 return mAccessMode == kAccessMode_None ? nullptr : mBuffer.get(); 69 } 70 71 void 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 80 class GpuPixelBuffer: public PixelBuffer { 81 public: 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 91 protected: 92 void unmap() override; 93 94 private: 95 GLuint mBuffer; 96 uint8_t* mMappedPointer; 97 Caches& mCaches; 98 }; 99 100 GpuPixelBuffer::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 } 111 112 GpuPixelBuffer::~GpuPixelBuffer() { 113 glDeleteBuffers(1, &mBuffer); 114 } 115 116 uint8_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 } 130 131 void 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 } 144 145 uint8_t* GpuPixelBuffer::getMappedPointer() const { 146 return mMappedPointer; 147 } 148 149 void 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 /////////////////////////////////////////////////////////////////////////////// 161 162 PixelBuffer* 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
