GraphicBufferMapper.cpp revision b26af23744fa73e8bc142b1eb98772fde5970c10
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 "GraphicBufferMapper" 18 19#include <stdint.h> 20#ifdef HAVE_ANDROID_OS // just want PAGE_SIZE define 21# include <asm/page.h> 22#else 23# include <sys/user.h> 24#endif 25#include <errno.h> 26#include <sys/mman.h> 27 28#include <cutils/ashmem.h> 29 30#include <utils/Errors.h> 31#include <utils/Log.h> 32 33#include <ui/GraphicBufferMapper.h> 34#include <ui/Rect.h> 35 36#include <hardware/gralloc.h> 37 38#include <private/ui/sw_gralloc_handle.h> 39 40 41namespace android { 42// --------------------------------------------------------------------------- 43 44ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferMapper ) 45 46GraphicBufferMapper::GraphicBufferMapper() 47 : mAllocMod(0) 48{ 49 hw_module_t const* module; 50 int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module); 51 LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID); 52 if (err == 0) { 53 mAllocMod = (gralloc_module_t const *)module; 54 } 55} 56 57status_t GraphicBufferMapper::registerBuffer(buffer_handle_t handle) 58{ 59 status_t err; 60 if (sw_gralloc_handle_t::validate(handle) < 0) { 61 err = mAllocMod->registerBuffer(mAllocMod, handle); 62 } else { 63 err = sw_gralloc_handle_t::registerBuffer((sw_gralloc_handle_t*)handle); 64 } 65 LOGW_IF(err, "registerBuffer(%p) failed %d (%s)", 66 handle, err, strerror(-err)); 67 return err; 68} 69 70status_t GraphicBufferMapper::unregisterBuffer(buffer_handle_t handle) 71{ 72 status_t err; 73 if (sw_gralloc_handle_t::validate(handle) < 0) { 74 err = mAllocMod->unregisterBuffer(mAllocMod, handle); 75 } else { 76 err = sw_gralloc_handle_t::unregisterBuffer((sw_gralloc_handle_t*)handle); 77 } 78 LOGW_IF(err, "unregisterBuffer(%p) failed %d (%s)", 79 handle, err, strerror(-err)); 80 return err; 81} 82 83status_t GraphicBufferMapper::lock(buffer_handle_t handle, 84 int usage, const Rect& bounds, void** vaddr) 85{ 86 status_t err; 87 if (sw_gralloc_handle_t::validate(handle) < 0) { 88 err = mAllocMod->lock(mAllocMod, handle, usage, 89 bounds.left, bounds.top, bounds.width(), bounds.height(), 90 vaddr); 91 } else { 92 err = sw_gralloc_handle_t::lock((sw_gralloc_handle_t*)handle, usage, 93 bounds.left, bounds.top, bounds.width(), bounds.height(), 94 vaddr); 95 } 96 LOGW_IF(err, "lock(...) failed %d (%s)", err, strerror(-err)); 97 return err; 98} 99 100status_t GraphicBufferMapper::unlock(buffer_handle_t handle) 101{ 102 status_t err; 103 if (sw_gralloc_handle_t::validate(handle) < 0) { 104 err = mAllocMod->unlock(mAllocMod, handle); 105 } else { 106 err = sw_gralloc_handle_t::unlock((sw_gralloc_handle_t*)handle); 107 } 108 LOGW_IF(err, "unlock(...) failed %d (%s)", err, strerror(-err)); 109 return err; 110} 111 112// --------------------------------------------------------------------------- 113 114status_t sw_gralloc_handle_t::alloc(uint32_t w, uint32_t h, int format, 115 int usage, buffer_handle_t* pHandle, int32_t* pStride) 116{ 117 int align = 4; 118 int bpp = 0; 119 switch (format) { 120 case HAL_PIXEL_FORMAT_RGBA_8888: 121 case HAL_PIXEL_FORMAT_RGBX_8888: 122 case HAL_PIXEL_FORMAT_BGRA_8888: 123 bpp = 4; 124 break; 125 case HAL_PIXEL_FORMAT_RGB_888: 126 bpp = 3; 127 break; 128 case HAL_PIXEL_FORMAT_RGB_565: 129 case HAL_PIXEL_FORMAT_RGBA_5551: 130 case HAL_PIXEL_FORMAT_RGBA_4444: 131 bpp = 2; 132 break; 133 default: 134 return -EINVAL; 135 } 136 size_t bpr = (w*bpp + (align-1)) & ~(align-1); 137 size_t size = bpr * h; 138 size_t stride = bpr / bpp; 139 size = (size + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1); 140 141 int fd = ashmem_create_region("sw-gralloc-buffer", size); 142 if (fd < 0) { 143 LOGE("ashmem_create_region(size=%d) failed (%s)", 144 size, strerror(-errno)); 145 return -errno; 146 } 147 148 int prot = PROT_READ; 149 if (usage & GRALLOC_USAGE_SW_WRITE_MASK) 150 prot |= PROT_WRITE; 151 152 if (ashmem_set_prot_region(fd, prot) < 0) { 153 LOGE("ashmem_set_prot_region(fd=%d, prot=%x) failed (%s)", 154 fd, prot, strerror(-errno)); 155 close(fd); 156 return -errno; 157 } 158 159 void* base = mmap(0, size, prot, MAP_SHARED, fd, 0); 160 if (base == MAP_FAILED) { 161 LOGE("alloc mmap(fd=%d, size=%d, prot=%x) failed (%s)", 162 fd, size, prot, strerror(-errno)); 163 close(fd); 164 return -errno; 165 } 166 167 sw_gralloc_handle_t* hnd = new sw_gralloc_handle_t(); 168 hnd->fd = fd; 169 hnd->size = size; 170 hnd->base = intptr_t(base); 171 hnd->prot = prot; 172 *pStride = stride; 173 *pHandle = hnd; 174 175 return NO_ERROR; 176} 177 178status_t sw_gralloc_handle_t::free(sw_gralloc_handle_t* hnd) 179{ 180 if (hnd->base) { 181 munmap((void*)hnd->base, hnd->size); 182 } 183 if (hnd->fd >= 0) { 184 close(hnd->fd); 185 } 186 delete hnd; 187 return NO_ERROR; 188} 189 190status_t sw_gralloc_handle_t::registerBuffer(sw_gralloc_handle_t* hnd) 191{ 192 if (hnd->pid != getpid()) { 193 void* base = mmap(0, hnd->size, hnd->prot, MAP_SHARED, hnd->fd, 0); 194 if (base == MAP_FAILED) { 195 LOGE("registerBuffer mmap(fd=%d, size=%d, prot=%x) failed (%s)", 196 hnd->fd, hnd->size, hnd->prot, strerror(-errno)); 197 return -errno; 198 } 199 hnd->base = intptr_t(base); 200 } 201 return NO_ERROR; 202} 203 204status_t sw_gralloc_handle_t::unregisterBuffer(sw_gralloc_handle_t* hnd) 205{ 206 if (hnd->pid != getpid()) { 207 if (hnd->base) { 208 munmap((void*)hnd->base, hnd->size); 209 } 210 hnd->base = 0; 211 } 212 return NO_ERROR; 213} 214 215status_t sw_gralloc_handle_t::lock(sw_gralloc_handle_t* hnd, int usage, 216 int l, int t, int w, int h, void** vaddr) 217{ 218 *vaddr = (void*)hnd->base; 219 return NO_ERROR; 220} 221 222status_t sw_gralloc_handle_t::unlock(sw_gralloc_handle_t* hnd) 223{ 224 return NO_ERROR; 225} 226 227// --------------------------------------------------------------------------- 228}; // namespace android 229