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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 "SurfaceFlinger"
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <cutils/memory.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/MemoryDealer.h>
#include <utils/IMemory.h>
#include <ui/PixelFormat.h>
#include <pixelflinger/pixelflinger.h>
#include "LayerBitmap.h"
#include "SurfaceFlinger.h"
#include "VRamHeap.h"
namespace android {
// ---------------------------------------------------------------------------
LayerBitmap::LayerBitmap()
: mAllocFlags(0), mOffset(0), mSize(-1U), mAlignment(2)
{
memset(&mSurface, 0, sizeof(mSurface));
}
LayerBitmap::~LayerBitmap()
{
mSurface.data = 0;
}
status_t LayerBitmap::init(const sp<MemoryDealer>& allocator)
{
if (mAllocator != NULL)
return BAD_VALUE;
mAllocator = allocator;
return NO_ERROR;
}
status_t LayerBitmap::setBits(uint32_t w, uint32_t h, uint32_t alignment,
PixelFormat format, uint32_t flags)
{
const sp<MemoryDealer>& allocator(mAllocator);
if (allocator == NULL)
return NO_INIT;
if (UNLIKELY(w == mSurface.width && h == mSurface.height &&
format == mSurface.format))
{ // same format and size, do nothing.
return NO_ERROR;
}
uint32_t allocFlags = MemoryDealer::PAGE_ALIGNED;
const uint32_t align = 4; // must match GL_UNPACK_ALIGNMENT
const uint32_t Bpp = bytesPerPixel(format);
uint32_t stride = (w + (alignment-1)) & ~(alignment-1);
stride = ((stride * Bpp + (align-1)) & ~(align-1)) / Bpp;
size_t size = stride * h * Bpp;
if (format == PIXEL_FORMAT_YCbCr_422_SP ||
format == PIXEL_FORMAT_YCbCr_420_SP) {
// in YUV planar, bitsPerPixel is for the Y plane
size = (size * bitsPerPixel(format)) / 8;
}
if (allocFlags & MemoryDealer::PAGE_ALIGNED) {
size_t pagesize = getpagesize();
size = (size + (pagesize-1)) & ~(pagesize-1);
}
/* FIXME: we should be able to have a h/v stride because the user of the
* surface might have stride limitation (for instance h/w codecs often do)
*/
int32_t vstride = 0;
mAlignment = alignment;
mAllocFlags = allocFlags;
mOffset = 0;
if (mSize != size) {
// would be nice to have a reallocate() api
mBitsMemory.clear(); // free-memory
mBitsMemory = allocator->allocate(size, allocFlags);
mSize = size;
} else {
// don't erase memory if we didn't have to reallocate
flags &= ~SECURE_BITS;
}
if (mBitsMemory != 0) {
mOffset = mBitsMemory->offset();
mSurface.data = static_cast<GGLubyte*>(mBitsMemory->pointer());
mSurface.version = sizeof(GGLSurface);
mSurface.width = w;
mSurface.height = h;
mSurface.stride = stride;
mSurface.vstride = vstride;
mSurface.format = format;
if (flags & SECURE_BITS)
clear();
}
if (mBitsMemory==0 || mSurface.data==0) {
LOGE("not enough memory for layer bitmap size=%u", size);
allocator->dump("LayerBitmap");
mSurface.data = 0;
mSize = -1U;
return NO_MEMORY;
}
return NO_ERROR;
}
void LayerBitmap::clear()
{
// NOTE: this memset should not be necessary, at least for
// opaque surface. However, for security reasons it's better to keep it
// (in the case of pmem, it's possible that the memory contains old
// data)
if (mSurface.data) {
memset(mSurface.data, 0, mSize);
//if (bytesPerPixel(mSurface.format) == 4) {
// android_memset32((uint32_t*)mSurface.data, 0xFF0000FF, mSize);
//} else {
// android_memset16((uint16_t*)mSurface.data, 0xF800, mSize);
//}
}
}
status_t LayerBitmap::getInfo(surface_info_t* info) const
{
if (mSurface.data == 0) {
memset(info, 0, sizeof(surface_info_t));
info->bits_offset = NO_MEMORY;
return NO_MEMORY;
}
info->w = uint16_t(width());
info->h = uint16_t(height());
info->stride= uint16_t(stride());
info->bpr = uint16_t(stride() * bytesPerPixel(pixelFormat()));
info->format= uint8_t(pixelFormat());
info->flags = surface_info_t::eBufferDirty;
info->bits_offset = ssize_t(mOffset);
return NO_ERROR;
}
status_t LayerBitmap::resize(uint32_t w, uint32_t h)
{
int err = setBits(w, h, mAlignment, pixelFormat(), SECURE_BITS);
return err;
}
size_t LayerBitmap::size() const
{
return mSize;
}
void LayerBitmap::getBitmapSurface(copybit_image_t* img) const
{
const sp<IMemoryHeap>& mh(getAllocator()->getMemoryHeap());
void* sbase = mh->base();
const GGLSurface& t(surface());
img->w = t.stride ?: t.width;
img->h = t.vstride ?: t.height;
img->format = t.format;
img->offset = intptr_t(t.data) - intptr_t(sbase);
img->base = sbase;
img->fd = mh->heapID();
}
// ---------------------------------------------------------------------------
}; // namespace android
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