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