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 <utils/Log.h> 20 21 #include "Caches.h" 22 #include "Debug.h" 23 #include "Extensions.h" 24 #include "PixelBuffer.h" 25 #include "Properties.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 ~CpuPixelBuffer(); 38 39 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite); 40 void unmap(); 41 42 uint8_t* getMappedPointer() const; 43 44 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset); 45 46 private: 47 uint8_t* mBuffer; 48 }; 49 50 CpuPixelBuffer::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 55 CpuPixelBuffer::~CpuPixelBuffer() { 56 delete[] mBuffer; 57 } 58 59 uint8_t* CpuPixelBuffer::map(AccessMode mode) { 60 if (mAccessMode == kAccessMode_None) { 61 mAccessMode = mode; 62 } 63 return mBuffer; 64 } 65 66 void CpuPixelBuffer::unmap() { 67 mAccessMode = kAccessMode_None; 68 } 69 70 uint8_t* CpuPixelBuffer::getMappedPointer() const { 71 return mAccessMode == kAccessMode_None ? NULL : mBuffer; 72 } 73 74 void CpuPixelBuffer::upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) { 75 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, 76 mFormat, GL_UNSIGNED_BYTE, mBuffer + offset); 77 } 78 79 /////////////////////////////////////////////////////////////////////////////// 80 // GPU pixel buffer 81 /////////////////////////////////////////////////////////////////////////////// 82 83 class GpuPixelBuffer: public PixelBuffer { 84 public: 85 GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height); 86 ~GpuPixelBuffer(); 87 88 uint8_t* map(AccessMode mode = kAccessMode_ReadWrite); 89 void unmap(); 90 91 uint8_t* getMappedPointer() const; 92 93 void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset); 94 95 private: 96 GLuint mBuffer; 97 uint8_t* mMappedPointer; 98 Caches& mCaches; 99 }; 100 101 GpuPixelBuffer::GpuPixelBuffer(GLenum format, uint32_t width, uint32_t height): 102 PixelBuffer(format, width, height), mMappedPointer(0), mCaches(Caches::getInstance()) { 103 glGenBuffers(1, &mBuffer); 104 mCaches.bindPixelBuffer(mBuffer); 105 glBufferData(GL_PIXEL_UNPACK_BUFFER, getSize(), NULL, GL_DYNAMIC_DRAW); 106 mCaches.unbindPixelBuffer(); 107 } 108 109 GpuPixelBuffer::~GpuPixelBuffer() { 110 glDeleteBuffers(1, &mBuffer); 111 } 112 113 uint8_t* GpuPixelBuffer::map(AccessMode mode) { 114 if (mAccessMode == kAccessMode_None) { 115 mCaches.bindPixelBuffer(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 } 130 131 void GpuPixelBuffer::unmap() { 132 if (mAccessMode != kAccessMode_None) { 133 if (mMappedPointer) { 134 mCaches.bindPixelBuffer(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 = NULL; 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.bindPixelBuffer(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 /////////////////////////////////////////////////////////////////////////////// 160 161 PixelBuffer* PixelBuffer::create(GLenum format, uint32_t width, uint32_t height, BufferType type) { 162 if (type == kBufferType_Auto && Caches::getInstance().gpuPixelBuffersEnabled) { 163 return new GpuPixelBuffer(format, width, height); 164 } 165 return new CpuPixelBuffer(format, width, height); 166 } 167 168 }; // namespace uirenderer 169 }; // namespace android 170
