| /* |
| * 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 "SkBitmapRegionDecoder.h" |
| #include "SkAndroidCodec.h" |
| #include "SkCodec.h" |
| #include "SkCodecPriv.h" |
| #include "SkImageDecoder.h" |
| |
| SkBitmapRegionDecoder* SkBitmapRegionDecoder::Create( |
| SkData* data, Strategy strategy) { |
| return SkBitmapRegionDecoder::Create(new SkMemoryStream(data), |
| strategy); |
| } |
| |
| SkBitmapRegionDecoder* SkBitmapRegionDecoder::Create( |
| SkStreamRewindable* stream, Strategy strategy) { |
| SkAutoTDelete<SkStreamRewindable> streamDeleter(stream); |
| switch (strategy) { |
| case kCanvas_Strategy: { |
| SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(streamDeleter.detach())); |
| if (nullptr == codec) { |
| SkCodecPrintf("Error: Failed to create decoder.\n"); |
| return nullptr; |
| } |
| |
| SkEncodedFormat format = codec->getEncodedFormat(); |
| switch (format) { |
| case SkEncodedFormat::kJPEG_SkEncodedFormat: |
| case SkEncodedFormat::kPNG_SkEncodedFormat: |
| break; |
| default: |
| // FIXME: Support webp using a special case. Webp does not support |
| // scanline decoding. |
| return nullptr; |
| } |
| |
| // If the image is a jpeg or a png, the scanline ordering should always be |
| // kTopDown or kNone. It is relevant to check because this implementation |
| // only supports these two scanline orderings. |
| SkASSERT(SkCodec::kTopDown_SkScanlineOrder == codec->getScanlineOrder() || |
| SkCodec::kNone_SkScanlineOrder == codec->getScanlineOrder()); |
| |
| return new SkBitmapRegionCanvas(codec.detach()); |
| } |
| case kAndroidCodec_Strategy: { |
| SkAutoTDelete<SkAndroidCodec> codec = |
| SkAndroidCodec::NewFromStream(streamDeleter.detach()); |
| if (nullptr == codec) { |
| SkCodecPrintf("Error: Failed to create codec.\n"); |
| return NULL; |
| } |
| |
| SkEncodedFormat format = codec->getEncodedFormat(); |
| switch (format) { |
| case SkEncodedFormat::kJPEG_SkEncodedFormat: |
| case SkEncodedFormat::kPNG_SkEncodedFormat: |
| case SkEncodedFormat::kWEBP_SkEncodedFormat: |
| break; |
| default: |
| return nullptr; |
| } |
| |
| return new SkBitmapRegionCodec(codec.detach()); |
| } |
| default: |
| SkASSERT(false); |
| return nullptr; |
| } |
| } |