msarett | a5783ae | 2015-09-08 15:35:32 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkBitmapRegionCanvas.h" |
| 9 | #include "SkBitmapRegionDecoderInterface.h" |
| 10 | #include "SkBitmapRegionSampler.h" |
scroggo | 46c5747 | 2015-09-30 08:57:13 -0700 | [diff] [blame] | 11 | #include "SkCodec.h" |
msarett | a5783ae | 2015-09-08 15:35:32 -0700 | [diff] [blame] | 12 | #include "SkImageDecoder.h" |
| 13 | |
| 14 | SkBitmapRegionDecoderInterface* SkBitmapRegionDecoderInterface::CreateBitmapRegionDecoder( |
| 15 | SkStreamRewindable* stream, Strategy strategy) { |
| 16 | switch (strategy) { |
| 17 | case kOriginal_Strategy: { |
| 18 | SkImageDecoder* decoder = SkImageDecoder::Factory(stream); |
| 19 | int width, height; |
| 20 | if (nullptr == decoder) { |
| 21 | SkDebugf("Error: Could not create image decoder.\n"); |
| 22 | return nullptr; |
| 23 | } |
| 24 | if (!decoder->buildTileIndex(stream, &width, &height)) { |
| 25 | SkDebugf("Error: Could not build tile index.\n"); |
| 26 | delete decoder; |
| 27 | return nullptr; |
| 28 | } |
| 29 | return new SkBitmapRegionSampler(decoder, width, height); |
| 30 | } |
| 31 | case kCanvas_Strategy: { |
scroggo | 46c5747 | 2015-09-30 08:57:13 -0700 | [diff] [blame] | 32 | SkCodec* decoder = SkCodec::NewFromStream(stream); |
msarett | a5783ae | 2015-09-08 15:35:32 -0700 | [diff] [blame] | 33 | if (nullptr == decoder) { |
| 34 | SkDebugf("Error: Failed to create decoder.\n"); |
| 35 | return nullptr; |
| 36 | } |
| 37 | switch (decoder->getScanlineOrder()) { |
scroggo | 46c5747 | 2015-09-30 08:57:13 -0700 | [diff] [blame] | 38 | case SkCodec::kTopDown_SkScanlineOrder: |
| 39 | case SkCodec::kNone_SkScanlineOrder: |
msarett | a5783ae | 2015-09-08 15:35:32 -0700 | [diff] [blame] | 40 | break; |
| 41 | default: |
| 42 | SkDebugf("Error: Scanline ordering not supported.\n"); |
| 43 | return nullptr; |
| 44 | } |
| 45 | return new SkBitmapRegionCanvas(decoder); |
| 46 | } |
| 47 | default: |
| 48 | SkASSERT(false); |
| 49 | return nullptr; |
| 50 | } |
| 51 | } |