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 namespace android { 32 33 // =========================================================================== 34 // Buffer and implementation of ANativeWindowBuffer 35 // =========================================================================== 36 37 GraphicBuffer::GraphicBuffer() 38 : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()), 39 mInitCheck(NO_ERROR), mIndex(-1) 40 { 41 width = 42 height = 43 stride = 44 format = 45 usage = 0; 46 handle = NULL; 47 } 48 49 GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h, 50 PixelFormat reqFormat, uint32_t reqUsage) 51 : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()), 52 mInitCheck(NO_ERROR), mIndex(-1) 53 { 54 width = 55 height = 56 stride = 57 format = 58 usage = 0; 59 handle = NULL; 60 mInitCheck = initSize(w, h, reqFormat, reqUsage); 61 } 62 63 GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h, 64 PixelFormat inFormat, uint32_t inUsage, 65 uint32_t inStride, native_handle_t* inHandle, bool keepOwnership) 66 : BASE(), mOwner(keepOwnership ? ownHandle : ownNone), 67 mBufferMapper(GraphicBufferMapper::get()), 68 mInitCheck(NO_ERROR), mIndex(-1) 69 { 70 width = w; 71 height = h; 72 stride = inStride; 73 format = inFormat; 74 usage = inUsage; 75 handle = inHandle; 76 } 77 78 GraphicBuffer::GraphicBuffer(ANativeWindowBuffer* buffer, bool keepOwnership) 79 : BASE(), mOwner(keepOwnership ? ownHandle : ownNone), 80 mBufferMapper(GraphicBufferMapper::get()), 81 mInitCheck(NO_ERROR), mIndex(-1), mWrappedBuffer(buffer) 82 { 83 width = buffer->width; 84 height = buffer->height; 85 stride = buffer->stride; 86 format = buffer->format; 87 usage = buffer->usage; 88 handle = buffer->handle; 89 } 90 91 GraphicBuffer::~GraphicBuffer() 92 { 93 if (handle) { 94 free_handle(); 95 } 96 } 97 98 void GraphicBuffer::free_handle() 99 { 100 if (mOwner == ownHandle) { 101 mBufferMapper.unregisterBuffer(handle); 102 native_handle_close(handle); 103 native_handle_delete(const_cast<native_handle*>(handle)); 104 } else if (mOwner == ownData) { 105 GraphicBufferAllocator& allocator(GraphicBufferAllocator::get()); 106 allocator.free(handle); 107 } 108 mWrappedBuffer = 0; 109 } 110 111 status_t GraphicBuffer::initCheck() const { 112 return mInitCheck; 113 } 114 115 void GraphicBuffer::dumpAllocationsToSystemLog() 116 { 117 GraphicBufferAllocator::dumpToSystemLog(); 118 } 119 120 ANativeWindowBuffer* GraphicBuffer::getNativeBuffer() const 121 { 122 return static_cast<ANativeWindowBuffer*>( 123 const_cast<GraphicBuffer*>(this)); 124 } 125 126 status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f, 127 uint32_t reqUsage) 128 { 129 if (mOwner != ownData) 130 return INVALID_OPERATION; 131 132 if (handle && w==width && h==height && f==format && reqUsage==usage) 133 return NO_ERROR; 134 135 if (handle) { 136 GraphicBufferAllocator& allocator(GraphicBufferAllocator::get()); 137 allocator.free(handle); 138 handle = 0; 139 } 140 return initSize(w, h, f, reqUsage); 141 } 142 143 status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format, 144 uint32_t reqUsage) 145 { 146 GraphicBufferAllocator& allocator = GraphicBufferAllocator::get(); 147 status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride); 148 if (err == NO_ERROR) { 149 this->width = w; 150 this->height = h; 151 this->format = format; 152 this->usage = reqUsage; 153 } 154 return err; 155 } 156 157 status_t GraphicBuffer::lock(uint32_t usage, void** vaddr) 158 { 159 const Rect lockBounds(width, height); 160 status_t res = lock(usage, lockBounds, vaddr); 161 return res; 162 } 163 164 status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr) 165 { 166 if (rect.left < 0 || rect.right > this->width || 167 rect.top < 0 || rect.bottom > this->height) { 168 ALOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)", 169 rect.left, rect.top, rect.right, rect.bottom, 170 this->width, this->height); 171 return BAD_VALUE; 172 } 173 status_t res = getBufferMapper().lock(handle, usage, rect, vaddr); 174 return res; 175 } 176 177 status_t GraphicBuffer::unlock() 178 { 179 status_t res = getBufferMapper().unlock(handle); 180 return res; 181 } 182 183 size_t GraphicBuffer::getFlattenedSize() const { 184 return (8 + (handle ? handle->numInts : 0))*sizeof(int); 185 } 186 187 size_t GraphicBuffer::getFdCount() const { 188 return handle ? handle->numFds : 0; 189 } 190 191 status_t GraphicBuffer::flatten(void* buffer, size_t size, 192 int fds[], size_t count) const 193 { 194 size_t sizeNeeded = GraphicBuffer::getFlattenedSize(); 195 if (size < sizeNeeded) return NO_MEMORY; 196 197 size_t fdCountNeeded = GraphicBuffer::getFdCount(); 198 if (count < fdCountNeeded) return NO_MEMORY; 199 200 int* buf = static_cast<int*>(buffer); 201 buf[0] = 'GBFR'; 202 buf[1] = width; 203 buf[2] = height; 204 buf[3] = stride; 205 buf[4] = format; 206 buf[5] = usage; 207 buf[6] = 0; 208 buf[7] = 0; 209 210 if (handle) { 211 buf[6] = handle->numFds; 212 buf[7] = handle->numInts; 213 native_handle_t const* const h = handle; 214 memcpy(fds, h->data, h->numFds*sizeof(int)); 215 memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int)); 216 } 217 218 return NO_ERROR; 219 } 220 221 status_t GraphicBuffer::unflatten(void const* buffer, size_t size, 222 int fds[], size_t count) 223 { 224 if (size < 8*sizeof(int)) return NO_MEMORY; 225 226 int const* buf = static_cast<int const*>(buffer); 227 if (buf[0] != 'GBFR') return BAD_TYPE; 228 229 const size_t numFds = buf[6]; 230 const size_t numInts = buf[7]; 231 232 const size_t sizeNeeded = (8 + numInts) * sizeof(int); 233 if (size < sizeNeeded) return NO_MEMORY; 234 235 size_t fdCountNeeded = 0; 236 if (count < fdCountNeeded) return NO_MEMORY; 237 238 if (handle) { 239 // free previous handle if any 240 free_handle(); 241 } 242 243 if (numFds || numInts) { 244 width = buf[1]; 245 height = buf[2]; 246 stride = buf[3]; 247 format = buf[4]; 248 usage = buf[5]; 249 native_handle* h = native_handle_create(numFds, numInts); 250 memcpy(h->data, fds, numFds*sizeof(int)); 251 memcpy(h->data + numFds, &buf[8], numInts*sizeof(int)); 252 handle = h; 253 } else { 254 width = height = stride = format = usage = 0; 255 handle = NULL; 256 } 257 258 mOwner = ownHandle; 259 260 if (handle != 0) { 261 mBufferMapper.registerBuffer(handle); 262 } 263 264 return NO_ERROR; 265 } 266 267 268 void GraphicBuffer::setIndex(int index) { 269 mIndex = index; 270 } 271 272 int GraphicBuffer::getIndex() const { 273 return mIndex; 274 } 275 276 // --------------------------------------------------------------------------- 277 278 }; // namespace android 279
