GraphicBuffer.cpp revision a8f3e4e53cad835d0d57b85a6ce1b7416e95ba73
1/* 2 * Copyright (C) 2007 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 "GraphicBuffer" 18 19#include <stdlib.h> 20#include <stdint.h> 21#include <sys/types.h> 22 23#include <utils/Errors.h> 24#include <utils/Log.h> 25 26#include <ui/GraphicBuffer.h> 27#include <ui/GraphicBufferAllocator.h> 28#include <ui/GraphicBufferMapper.h> 29#include <ui/PixelFormat.h> 30 31#include <pixelflinger/pixelflinger.h> 32 33namespace android { 34 35// =========================================================================== 36// Buffer and implementation of android_native_buffer_t 37// =========================================================================== 38 39GraphicBuffer::GraphicBuffer() 40 : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()), 41 mInitCheck(NO_ERROR), mIndex(-1) 42{ 43 width = 44 height = 45 stride = 46 format = 47 usage = 0; 48 handle = NULL; 49} 50 51GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h, 52 PixelFormat reqFormat, uint32_t reqUsage) 53 : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()), 54 mInitCheck(NO_ERROR), mIndex(-1) 55{ 56 width = 57 height = 58 stride = 59 format = 60 usage = 0; 61 handle = NULL; 62 mInitCheck = initSize(w, h, reqFormat, reqUsage); 63} 64 65GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h, 66 PixelFormat inFormat, uint32_t inUsage, 67 uint32_t inStride, native_handle_t* inHandle, bool keepOwnership) 68 : BASE(), mOwner(keepOwnership ? ownHandle : ownNone), 69 mBufferMapper(GraphicBufferMapper::get()), 70 mInitCheck(NO_ERROR), mIndex(-1) 71{ 72 width = w; 73 height = h; 74 stride = inStride; 75 format = inFormat; 76 usage = inUsage; 77 handle = inHandle; 78} 79 80GraphicBuffer::~GraphicBuffer() 81{ 82 if (handle) { 83 free_handle(); 84 } 85} 86 87void GraphicBuffer::free_handle() 88{ 89 if (mOwner == ownHandle) { 90 native_handle_close(handle); 91 native_handle_delete(const_cast<native_handle*>(handle)); 92 } else if (mOwner == ownData) { 93 GraphicBufferAllocator& allocator(GraphicBufferAllocator::get()); 94 allocator.free(handle); 95 } 96} 97 98status_t GraphicBuffer::initCheck() const { 99 return mInitCheck; 100} 101 102android_native_buffer_t* GraphicBuffer::getNativeBuffer() const 103{ 104 return static_cast<android_native_buffer_t*>( 105 const_cast<GraphicBuffer*>(this)); 106} 107 108status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f, 109 uint32_t reqUsage) 110{ 111 if (mOwner != ownData) 112 return INVALID_OPERATION; 113 114 if (handle && w==width && h==height && f==format && reqUsage==usage) 115 return NO_ERROR; 116 117 if (handle) { 118 GraphicBufferAllocator& allocator(GraphicBufferAllocator::get()); 119 allocator.free(handle); 120 handle = 0; 121 } 122 return initSize(w, h, f, reqUsage); 123} 124 125status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format, 126 uint32_t reqUsage) 127{ 128 GraphicBufferAllocator& allocator = GraphicBufferAllocator::get(); 129 status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride); 130 if (err == NO_ERROR) { 131 this->width = w; 132 this->height = h; 133 this->format = format; 134 this->usage = reqUsage; 135 } 136 return err; 137} 138 139status_t GraphicBuffer::lock(uint32_t usage, void** vaddr) 140{ 141 const Rect lockBounds(width, height); 142 status_t res = lock(usage, lockBounds, vaddr); 143 return res; 144} 145 146status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr) 147{ 148 if (rect.left < 0 || rect.right > this->width || 149 rect.top < 0 || rect.bottom > this->height) { 150 LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)", 151 rect.left, rect.top, rect.right, rect.bottom, 152 this->width, this->height); 153 return BAD_VALUE; 154 } 155 status_t res = getBufferMapper().lock(handle, usage, rect, vaddr); 156 return res; 157} 158 159status_t GraphicBuffer::unlock() 160{ 161 status_t res = getBufferMapper().unlock(handle); 162 return res; 163} 164 165status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage) 166{ 167 void* vaddr; 168 status_t res = GraphicBuffer::lock(usage, &vaddr); 169 if (res == NO_ERROR && sur) { 170 sur->version = sizeof(GGLSurface); 171 sur->width = width; 172 sur->height = height; 173 sur->stride = stride; 174 sur->format = format; 175 sur->data = static_cast<GGLubyte*>(vaddr); 176 } 177 return res; 178} 179 180size_t GraphicBuffer::getFlattenedSize() const { 181 return (8 + (handle ? handle->numInts : 0))*sizeof(int); 182} 183 184size_t GraphicBuffer::getFdCount() const { 185 return handle ? handle->numFds : 0; 186} 187 188status_t GraphicBuffer::flatten(void* buffer, size_t size, 189 int fds[], size_t count) const 190{ 191 size_t sizeNeeded = GraphicBuffer::getFlattenedSize(); 192 if (size < sizeNeeded) return NO_MEMORY; 193 194 size_t fdCountNeeded = GraphicBuffer::getFdCount(); 195 if (count < fdCountNeeded) return NO_MEMORY; 196 197 int* buf = static_cast<int*>(buffer); 198 buf[0] = 'GBFR'; 199 buf[1] = width; 200 buf[2] = height; 201 buf[3] = stride; 202 buf[4] = format; 203 buf[5] = usage; 204 buf[6] = 0; 205 buf[7] = 0; 206 207 if (handle) { 208 buf[6] = handle->numFds; 209 buf[7] = handle->numInts; 210 native_handle_t const* const h = handle; 211 memcpy(fds, h->data, h->numFds*sizeof(int)); 212 memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int)); 213 } 214 215 return NO_ERROR; 216} 217 218status_t GraphicBuffer::unflatten(void const* buffer, size_t size, 219 int fds[], size_t count) 220{ 221 if (size < 8*sizeof(int)) return NO_MEMORY; 222 223 int const* buf = static_cast<int const*>(buffer); 224 if (buf[0] != 'GBFR') return BAD_TYPE; 225 226 const size_t numFds = buf[6]; 227 const size_t numInts = buf[7]; 228 229 const size_t sizeNeeded = (8 + numInts) * sizeof(int); 230 if (size < sizeNeeded) return NO_MEMORY; 231 232 size_t fdCountNeeded = 0; 233 if (count < fdCountNeeded) return NO_MEMORY; 234 235 if (handle) { 236 // free previous handle if any 237 free_handle(); 238 } 239 240 if (numFds || numInts) { 241 width = buf[1]; 242 height = buf[2]; 243 stride = buf[3]; 244 format = buf[4]; 245 usage = buf[5]; 246 native_handle* h = native_handle_create(numFds, numInts); 247 memcpy(h->data, fds, numFds*sizeof(int)); 248 memcpy(h->data + numFds, &buf[8], numInts*sizeof(int)); 249 handle = h; 250 } else { 251 width = height = stride = format = usage = 0; 252 handle = NULL; 253 } 254 255 mOwner = ownHandle; 256 return NO_ERROR; 257} 258 259 260void GraphicBuffer::setIndex(int index) { 261 mIndex = index; 262} 263 264int GraphicBuffer::getIndex() const { 265 return mIndex; 266} 267 268// --------------------------------------------------------------------------- 269 270}; // namespace android 271