229 lines
6.4 KiB
C++
229 lines
6.4 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "GraphicBufferMapper"
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#include <stdint.h>
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#ifdef HAVE_ANDROID_OS // just want PAGE_SIZE define
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# include <asm/page.h>
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#else
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# include <sys/user.h>
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#endif
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#include <errno.h>
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#include <sys/mman.h>
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#include <cutils/ashmem.h>
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#include <utils/Errors.h>
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#include <utils/Log.h>
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#include <ui/GraphicBufferMapper.h>
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#include <ui/Rect.h>
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#include <hardware/gralloc.h>
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#include <private/ui/sw_gralloc_handle.h>
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namespace android {
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// ---------------------------------------------------------------------------
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ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferMapper )
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GraphicBufferMapper::GraphicBufferMapper()
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: mAllocMod(0)
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{
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hw_module_t const* module;
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int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
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LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
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if (err == 0) {
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mAllocMod = (gralloc_module_t const *)module;
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}
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}
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status_t GraphicBufferMapper::registerBuffer(buffer_handle_t handle)
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{
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status_t err;
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if (sw_gralloc_handle_t::validate(handle) < 0) {
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err = mAllocMod->registerBuffer(mAllocMod, handle);
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} else {
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err = sw_gralloc_handle_t::registerBuffer((sw_gralloc_handle_t*)handle);
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}
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LOGW_IF(err, "registerBuffer(%p) failed %d (%s)",
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handle, err, strerror(-err));
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return err;
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}
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status_t GraphicBufferMapper::unregisterBuffer(buffer_handle_t handle)
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{
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status_t err;
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if (sw_gralloc_handle_t::validate(handle) < 0) {
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err = mAllocMod->unregisterBuffer(mAllocMod, handle);
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} else {
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err = sw_gralloc_handle_t::unregisterBuffer((sw_gralloc_handle_t*)handle);
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}
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LOGW_IF(err, "unregisterBuffer(%p) failed %d (%s)",
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handle, err, strerror(-err));
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return err;
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}
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status_t GraphicBufferMapper::lock(buffer_handle_t handle,
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int usage, const Rect& bounds, void** vaddr)
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{
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status_t err;
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if (sw_gralloc_handle_t::validate(handle) < 0) {
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err = mAllocMod->lock(mAllocMod, handle, usage,
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bounds.left, bounds.top, bounds.width(), bounds.height(),
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vaddr);
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} else {
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err = sw_gralloc_handle_t::lock((sw_gralloc_handle_t*)handle, usage,
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bounds.left, bounds.top, bounds.width(), bounds.height(),
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vaddr);
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}
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LOGW_IF(err, "lock(...) failed %d (%s)", err, strerror(-err));
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return err;
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}
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status_t GraphicBufferMapper::unlock(buffer_handle_t handle)
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{
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status_t err;
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if (sw_gralloc_handle_t::validate(handle) < 0) {
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err = mAllocMod->unlock(mAllocMod, handle);
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} else {
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err = sw_gralloc_handle_t::unlock((sw_gralloc_handle_t*)handle);
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}
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LOGW_IF(err, "unlock(...) failed %d (%s)", err, strerror(-err));
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return err;
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}
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// ---------------------------------------------------------------------------
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status_t sw_gralloc_handle_t::alloc(uint32_t w, uint32_t h, int format,
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int usage, buffer_handle_t* pHandle, int32_t* pStride)
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{
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int align = 4;
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int bpp = 0;
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switch (format) {
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case HAL_PIXEL_FORMAT_RGBA_8888:
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case HAL_PIXEL_FORMAT_RGBX_8888:
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case HAL_PIXEL_FORMAT_BGRA_8888:
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bpp = 4;
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break;
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case HAL_PIXEL_FORMAT_RGB_888:
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bpp = 3;
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break;
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case HAL_PIXEL_FORMAT_RGB_565:
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case HAL_PIXEL_FORMAT_RGBA_5551:
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case HAL_PIXEL_FORMAT_RGBA_4444:
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bpp = 2;
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break;
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default:
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return -EINVAL;
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}
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size_t bpr = (w*bpp + (align-1)) & ~(align-1);
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size_t size = bpr * h;
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size_t stride = bpr / bpp;
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size = (size + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
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int fd = ashmem_create_region("sw-gralloc-buffer", size);
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if (fd < 0) {
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LOGE("ashmem_create_region(size=%d) failed (%s)",
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size, strerror(-errno));
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return -errno;
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}
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int prot = PROT_READ;
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if (usage & GRALLOC_USAGE_SW_WRITE_MASK)
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prot |= PROT_WRITE;
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if (ashmem_set_prot_region(fd, prot) < 0) {
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LOGE("ashmem_set_prot_region(fd=%d, prot=%x) failed (%s)",
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fd, prot, strerror(-errno));
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close(fd);
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return -errno;
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}
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void* base = mmap(0, size, prot, MAP_SHARED, fd, 0);
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if (base == MAP_FAILED) {
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LOGE("alloc mmap(fd=%d, size=%d, prot=%x) failed (%s)",
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fd, size, prot, strerror(-errno));
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close(fd);
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return -errno;
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}
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sw_gralloc_handle_t* hnd = new sw_gralloc_handle_t();
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hnd->fd = fd;
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hnd->size = size;
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hnd->base = intptr_t(base);
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hnd->prot = prot;
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*pStride = stride;
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*pHandle = hnd;
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return NO_ERROR;
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}
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status_t sw_gralloc_handle_t::free(sw_gralloc_handle_t* hnd)
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{
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if (hnd->base) {
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munmap((void*)hnd->base, hnd->size);
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}
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if (hnd->fd >= 0) {
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close(hnd->fd);
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}
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delete hnd;
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return NO_ERROR;
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}
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status_t sw_gralloc_handle_t::registerBuffer(sw_gralloc_handle_t* hnd)
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{
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if (hnd->pid != getpid()) {
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void* base = mmap(0, hnd->size, hnd->prot, MAP_SHARED, hnd->fd, 0);
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if (base == MAP_FAILED) {
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LOGE("registerBuffer mmap(fd=%d, size=%d, prot=%x) failed (%s)",
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hnd->fd, hnd->size, hnd->prot, strerror(-errno));
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return -errno;
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}
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hnd->base = intptr_t(base);
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}
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return NO_ERROR;
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}
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status_t sw_gralloc_handle_t::unregisterBuffer(sw_gralloc_handle_t* hnd)
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{
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if (hnd->pid != getpid()) {
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if (hnd->base) {
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munmap((void*)hnd->base, hnd->size);
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}
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hnd->base = 0;
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}
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return NO_ERROR;
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}
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status_t sw_gralloc_handle_t::lock(sw_gralloc_handle_t* hnd, int usage,
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int l, int t, int w, int h, void** vaddr)
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{
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*vaddr = (void*)hnd->base;
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return NO_ERROR;
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}
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status_t sw_gralloc_handle_t::unlock(sw_gralloc_handle_t* hnd)
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{
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return NO_ERROR;
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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