| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBitmapRegionCanvas.h" |
| #include "SkBitmapRegionCodec.h" |
| #include "SkBitmapRegionDecoderInterface.h" |
| #include "SkBitmapRegionSampler.h" |
| #include "SkAndroidCodec.h" |
| #include "SkCodec.h" |
| #include "SkCodecPriv.h" |
| #include "SkImageDecoder.h" |
| |
| SkBitmapRegionDecoderInterface* SkBitmapRegionDecoderInterface::CreateBitmapRegionDecoder( |
| SkData* data, Strategy strategy) { |
| switch (strategy) { |
| case kOriginal_Strategy: { |
| SkAutoTDelete<SkStreamRewindable> stream(new SkMemoryStream(data)); |
| SkImageDecoder* decoder = SkImageDecoder::Factory(stream); |
| int width, height; |
| if (nullptr == decoder) { |
| SkCodecPrintf("Error: Could not create image decoder.\n"); |
| return nullptr; |
| } |
| if (!decoder->buildTileIndex(stream.detach(), &width, &height)) { |
| SkCodecPrintf("Error: Could not build tile index.\n"); |
| delete decoder; |
| return nullptr; |
| } |
| return new SkBitmapRegionSampler(decoder, width, height); |
| } |
| case kCanvas_Strategy: { |
| SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(data)); |
| if (nullptr == codec) { |
| SkCodecPrintf("Error: Failed to create decoder.\n"); |
| return nullptr; |
| } |
| switch (codec->getScanlineOrder()) { |
| case SkCodec::kTopDown_SkScanlineOrder: |
| case SkCodec::kNone_SkScanlineOrder: |
| break; |
| default: |
| SkCodecPrintf("Error: Scanline ordering not supported.\n"); |
| return nullptr; |
| } |
| return new SkBitmapRegionCanvas(codec.detach()); |
| } |
| case kAndroidCodec_Strategy: { |
| SkAutoTDelete<SkAndroidCodec> codec = SkAndroidCodec::NewFromData(data); |
| if (NULL == codec) { |
| SkCodecPrintf("Error: Failed to create codec.\n"); |
| return NULL; |
| } |
| return new SkBitmapRegionCodec(codec.detach()); |
| } |
| default: |
| SkASSERT(false); |
| return nullptr; |
| } |
| } |