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      1 /*
      2  * Copyright (C) 2013 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 // Provides the implementation of the GraphicBuffer interface in
     18 // renderer compostior
     19 
     20 #include "graphic_buffer_impl.h"
     21 
     22 #include <utils/Errors.h>
     23 
     24 namespace android {
     25 
     26 GraphicBufferImpl::GraphicBufferImpl(uint32_t w, uint32_t h)
     27   : mBuffer(new android::GraphicBuffer(w, h, PIXEL_FORMAT_RGBA_8888,
     28        android::GraphicBuffer::USAGE_HW_TEXTURE |
     29        android::GraphicBuffer::USAGE_SW_READ_OFTEN |
     30        android::GraphicBuffer::USAGE_SW_WRITE_OFTEN)) {
     31 }
     32 
     33 GraphicBufferImpl::~GraphicBufferImpl() {
     34 }
     35 
     36 // static
     37 int GraphicBufferImpl::Create(int w, int h) {
     38   GraphicBufferImpl* buffer = new GraphicBufferImpl(
     39       static_cast<uint32_t>(w), static_cast<uint32_t>(h));
     40   if (buffer->InitCheck() != NO_ERROR) {
     41     delete buffer;
     42     return 0;
     43   }
     44   return reinterpret_cast<int>(buffer);
     45 }
     46 
     47 // static
     48 void GraphicBufferImpl::Release(int buffer_id) {
     49   GraphicBufferImpl* buffer = reinterpret_cast<GraphicBufferImpl*>(buffer_id);
     50   delete buffer;
     51 }
     52 
     53 // static
     54 int GraphicBufferImpl::MapStatic(int buffer_id, AwMapMode mode, void** vaddr) {
     55   GraphicBufferImpl* buffer = reinterpret_cast<GraphicBufferImpl*>(buffer_id);
     56   return buffer->Map(mode, vaddr);
     57 }
     58 
     59 // static
     60 int GraphicBufferImpl::UnmapStatic(int buffer_id) {
     61   GraphicBufferImpl* buffer = reinterpret_cast<GraphicBufferImpl*>(buffer_id);
     62   return buffer->Unmap();
     63 }
     64 
     65 // static
     66 void* GraphicBufferImpl::GetNativeBufferStatic(int buffer_id) {
     67   GraphicBufferImpl* buffer = reinterpret_cast<GraphicBufferImpl*>(buffer_id);
     68   return buffer->GetNativeBuffer();
     69 }
     70 
     71 // static
     72 uint32_t GraphicBufferImpl::GetStrideStatic(int buffer_id) {
     73   GraphicBufferImpl* buffer = reinterpret_cast<GraphicBufferImpl*>(buffer_id);
     74   return buffer->GetStride();
     75 }
     76 
     77 status_t GraphicBufferImpl::Map(AwMapMode mode, void** vaddr) {
     78   int usage = 0;
     79   switch (mode) {
     80     case MAP_READ_ONLY:
     81       usage = android::GraphicBuffer::USAGE_SW_READ_OFTEN;
     82       break;
     83     case MAP_WRITE_ONLY:
     84       usage = android::GraphicBuffer::USAGE_SW_WRITE_OFTEN;
     85       break;
     86     case MAP_READ_WRITE:
     87       usage = android::GraphicBuffer::USAGE_SW_READ_OFTEN |
     88           android::GraphicBuffer::USAGE_SW_WRITE_OFTEN;
     89       break;
     90     default:
     91       return INVALID_OPERATION;
     92   }
     93   return mBuffer->lock(usage, vaddr);
     94 }
     95 
     96 status_t GraphicBufferImpl::Unmap() {
     97   return mBuffer->unlock();
     98 }
     99 
    100 status_t GraphicBufferImpl::InitCheck() const {
    101   return mBuffer->initCheck();
    102 }
    103 
    104 void* GraphicBufferImpl::GetNativeBuffer() const {
    105   return mBuffer->getNativeBuffer();
    106 }
    107 
    108 uint32_t GraphicBufferImpl::GetStride() const {
    109   static const int kBytesPerPixel = 4;
    110   return mBuffer->getStride() * kBytesPerPixel;
    111 }
    112 
    113 } // namespace android
    114