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 33 namespace android { 34 35 // =========================================================================== 36 // Buffer and implementation of android_native_buffer_t 37 // =========================================================================== 38 39 GraphicBuffer::GraphicBuffer() 40 : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()), 41 mInitCheck(NO_ERROR), mVStride(0), mIndex(-1) 42 { 43 width = 44 height = 45 stride = 46 format = 47 usage = 0; 48 handle = NULL; 49 } 50 51 GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h, 52 PixelFormat reqFormat, uint32_t reqUsage) 53 : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()), 54 mInitCheck(NO_ERROR), mVStride(0), 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 65 GraphicBuffer::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), mVStride(0), mIndex(-1) 71 { 72 width = w; 73 height = h; 74 stride = inStride; 75 format = inFormat; 76 usage = inUsage; 77 handle = inHandle; 78 } 79 80 GraphicBuffer::~GraphicBuffer() 81 { 82 if (handle) { 83 free_handle(); 84 } 85 } 86 87 void 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 98 status_t GraphicBuffer::initCheck() const { 99 return mInitCheck; 100 } 101 102 android_native_buffer_t* GraphicBuffer::getNativeBuffer() const 103 { 104 return static_cast<android_native_buffer_t*>( 105 const_cast<GraphicBuffer*>(this)); 106 } 107 108 status_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) { 115 GraphicBufferAllocator& allocator(GraphicBufferAllocator::get()); 116 allocator.free(handle); 117 handle = 0; 118 } 119 return initSize(w, h, f, reqUsage); 120 } 121 122 status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format, 123 uint32_t reqUsage) 124 { 125 if (format == PIXEL_FORMAT_RGBX_8888) 126 format = PIXEL_FORMAT_RGBA_8888; 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 mVStride = 0; 136 } 137 return err; 138 } 139 140 status_t GraphicBuffer::lock(uint32_t usage, void** vaddr) 141 { 142 const Rect lockBounds(width, height); 143 status_t res = lock(usage, lockBounds, vaddr); 144 return res; 145 } 146 147 status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr) 148 { 149 if (rect.left < 0 || rect.right > this->width || 150 rect.top < 0 || rect.bottom > this->height) { 151 LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)", 152 rect.left, rect.top, rect.right, rect.bottom, 153 this->width, this->height); 154 return BAD_VALUE; 155 } 156 status_t res = getBufferMapper().lock(handle, usage, rect, vaddr); 157 return res; 158 } 159 160 status_t GraphicBuffer::unlock() 161 { 162 status_t res = getBufferMapper().unlock(handle); 163 return res; 164 } 165 166 status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage) 167 { 168 void* vaddr; 169 status_t res = GraphicBuffer::lock(usage, &vaddr); 170 if (res == NO_ERROR && sur) { 171 sur->version = sizeof(GGLSurface); 172 sur->width = width; 173 sur->height = height; 174 sur->stride = stride; 175 sur->format = format; 176 sur->vstride = mVStride; 177 sur->data = static_cast<GGLubyte*>(vaddr); 178 } 179 return res; 180 } 181 182 size_t GraphicBuffer::getFlattenedSize() const { 183 return (8 + (handle ? handle->numInts : 0))*sizeof(int); 184 } 185 186 size_t GraphicBuffer::getFdCount() const { 187 return handle ? handle->numFds : 0; 188 } 189 190 status_t GraphicBuffer::flatten(void* buffer, size_t size, 191 int fds[], size_t count) const 192 { 193 size_t sizeNeeded = GraphicBuffer::getFlattenedSize(); 194 if (size < sizeNeeded) return NO_MEMORY; 195 196 size_t fdCountNeeded = GraphicBuffer::getFdCount(); 197 if (count < fdCountNeeded) return NO_MEMORY; 198 199 int* buf = static_cast<int*>(buffer); 200 buf[0] = 'GBFR'; 201 buf[1] = width; 202 buf[2] = height; 203 buf[3] = stride; 204 buf[4] = format; 205 buf[5] = usage; 206 buf[6] = 0; 207 buf[7] = 0; 208 209 if (handle) { 210 buf[6] = handle->numFds; 211 buf[7] = handle->numInts; 212 native_handle_t const* const h = handle; 213 memcpy(fds, h->data, h->numFds*sizeof(int)); 214 memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int)); 215 } 216 217 return NO_ERROR; 218 } 219 220 status_t GraphicBuffer::unflatten(void const* buffer, size_t size, 221 int fds[], size_t count) 222 { 223 if (size < 8*sizeof(int)) return NO_MEMORY; 224 225 int const* buf = static_cast<int const*>(buffer); 226 if (buf[0] != 'GBFR') return BAD_TYPE; 227 228 const size_t numFds = buf[6]; 229 const size_t numInts = buf[7]; 230 231 const size_t sizeNeeded = (8 + numInts) * sizeof(int); 232 if (size < sizeNeeded) return NO_MEMORY; 233 234 size_t fdCountNeeded = 0; 235 if (count < fdCountNeeded) return NO_MEMORY; 236 237 if (handle) { 238 // free previous handle if any 239 free_handle(); 240 } 241 242 if (numFds || numInts) { 243 width = buf[1]; 244 height = buf[2]; 245 stride = buf[3]; 246 format = buf[4]; 247 usage = buf[5]; 248 native_handle* h = native_handle_create(numFds, numInts); 249 memcpy(h->data, fds, numFds*sizeof(int)); 250 memcpy(h->data + numFds, &buf[8], numInts*sizeof(int)); 251 handle = h; 252 } else { 253 width = height = stride = format = usage = 0; 254 handle = NULL; 255 } 256 257 mOwner = ownHandle; 258 return NO_ERROR; 259 } 260 261 262 void GraphicBuffer::setIndex(int index) { 263 mIndex = index; 264 } 265 266 int GraphicBuffer::getIndex() const { 267 return mIndex; 268 } 269 270 void GraphicBuffer::setVerticalStride(uint32_t vstride) { 271 mVStride = vstride; 272 } 273 274 uint32_t GraphicBuffer::getVerticalStride() const { 275 return mVStride; 276 } 277 278 // --------------------------------------------------------------------------- 279 280 }; // namespace android 281
