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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.
*/
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <binder/MemoryBase.h>
#include <binder/IMemory.h>
#include <ui/PixelFormat.h>
#include <ui/Surface.h>
#include <pixelflinger/pixelflinger.h>
#include "BufferAllocator.h"
#include "LayerBitmap.h"
#include "SurfaceFlinger.h"
namespace android {
// ===========================================================================
// Buffer and implementation of android_native_buffer_t
// ===========================================================================
Buffer::Buffer(uint32_t w, uint32_t h, PixelFormat format,
uint32_t reqUsage, uint32_t flags)
: SurfaceBuffer(), mInitCheck(NO_INIT), mFlags(flags),
mVStride(0)
{
this->format = format;
if (w>0 && h>0) {
mInitCheck = initSize(w, h, reqUsage);
}
}
Buffer::~Buffer()
{
if (handle) {
BufferAllocator& allocator(BufferAllocator::get());
allocator.free(handle);
}
}
status_t Buffer::initCheck() const {
return mInitCheck;
}
android_native_buffer_t* Buffer::getNativeBuffer() const
{
return static_cast<android_native_buffer_t*>(const_cast<Buffer*>(this));
}
status_t Buffer::initSize(uint32_t w, uint32_t h, uint32_t reqUsage)
{
status_t err = NO_ERROR;
BufferAllocator& allocator = BufferAllocator::get();
/*
* buffers used for software rendering, but h/w composition
* are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE
*
* buffers used for h/w rendering and h/w composition
* are allocated with HW_RENDER | HW_TEXTURE
*
* buffers used with h/w rendering and either NPOT or no egl_image_ext
* are allocated with SW_READ_RARELY | HW_RENDER
*
*/
if (mFlags & Buffer::SECURE) {
// secure buffer, don't store it into the GPU
usage = BufferAllocator::USAGE_SW_READ_OFTEN |
BufferAllocator::USAGE_SW_WRITE_OFTEN;
} else {
// it's allowed to modify the usage flags here, but generally
// the requested flags should be honored.
usage = reqUsage | BufferAllocator::USAGE_HW_TEXTURE;
}
err = allocator.alloc(w, h, format, usage, &handle, &stride);
if (err == NO_ERROR) {
if (err == NO_ERROR) {
width = w;
height = h;
mVStride = 0;
}
}
return err;
}
status_t Buffer::lock(GGLSurface* sur, uint32_t usage)
{
void* vaddr;
status_t res = SurfaceBuffer::lock(usage, &vaddr);
if (res == NO_ERROR && sur) {
sur->version = sizeof(GGLSurface);
sur->width = width;
sur->height = height;
sur->stride = stride;
sur->format = format;
sur->vstride = mVStride;
sur->data = static_cast<GGLubyte*>(vaddr);
}
return res;
}
// ===========================================================================
// LayerBitmap
// ===========================================================================
LayerBitmap::LayerBitmap()
: mInfo(0), mWidth(0), mHeight(0)
{
}
LayerBitmap::~LayerBitmap()
{
}
status_t LayerBitmap::init(surface_info_t* info,
uint32_t w, uint32_t h, PixelFormat format, uint32_t flags)
{
if (info == NULL)
return BAD_VALUE;
mFormat = format;
mFlags = flags;
mWidth = w;
mHeight = h;
mInfo = info;
memset(info, 0, sizeof(surface_info_t));
info->flags = surface_info_t::eNeedNewBuffer;
// init the buffer, but don't trigger an allocation
mBuffer = new Buffer(0, 0, format, flags);
return NO_ERROR;
}
status_t LayerBitmap::setSize(uint32_t w, uint32_t h)
{
Mutex::Autolock _l(mLock);
if ((w != mWidth) || (h != mHeight)) {
mWidth = w;
mHeight = h;
// this will signal the client that it needs to asks us for a new buffer
mInfo->flags = surface_info_t::eNeedNewBuffer;
}
return NO_ERROR;
}
sp<Buffer> LayerBitmap::allocate(uint32_t reqUsage)
{
Mutex::Autolock _l(mLock);
surface_info_t* info = mInfo;
mBuffer.clear(); // free buffer before allocating a new one
sp<Buffer> buffer = new Buffer(mWidth, mHeight, mFormat, reqUsage, mFlags);
status_t err = buffer->initCheck();
if (LIKELY(err == NO_ERROR)) {
info->flags = surface_info_t::eBufferDirty;
info->status = NO_ERROR;
} else {
memset(info, 0, sizeof(surface_info_t));
info->status = NO_MEMORY;
}
mBuffer = buffer;
return buffer;
}
status_t LayerBitmap::free()
{
mBuffer.clear();
mWidth = 0;
mHeight = 0;
return NO_ERROR;
}
// ---------------------------------------------------------------------------
}; // namespace android
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