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| 1 /* |
| 2 * Copyright 2012 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 "SkImageDecoder.h" |
| 9 #include "SkImage_Base.h" |
| 10 #include "SkBitmap.h" |
| 11 #include "SkCanvas.h" |
| 12 #include "SkData.h" |
| 13 |
| 14 class SkImage_Codec : public SkImage_Base { |
| 15 public: |
| 16 static SkImage* NewEmpty(); |
| 17 |
| 18 SkImage_Codec(SkData* encodedData, int width, int height); |
| 19 virtual ~SkImage_Codec(); |
| 20 |
| 21 virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) const SK_
OVERRIDE; |
| 22 virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, |
| 23 const SkPaint*) const SK_OVERRIDE; |
| 24 |
| 25 private: |
| 26 SkData* fEncodedData; |
| 27 SkBitmap fBitmap; |
| 28 |
| 29 typedef SkImage_Base INHERITED; |
| 30 }; |
| 31 |
| 32 /////////////////////////////////////////////////////////////////////////////// |
| 33 |
| 34 SkImage_Codec::SkImage_Codec(SkData* data, int width, int height) : INHERITED(wi
dth, height) { |
| 35 fEncodedData = data; |
| 36 fEncodedData->ref(); |
| 37 } |
| 38 |
| 39 SkImage_Codec::~SkImage_Codec() { |
| 40 fEncodedData->unref(); |
| 41 } |
| 42 |
| 43 void SkImage_Codec::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPai
nt* paint) const { |
| 44 if (!fBitmap.pixelRef()) { |
| 45 // todo: this needs to be thread-safe |
| 46 SkBitmap* bitmap = const_cast<SkBitmap*>(&fBitmap); |
| 47 if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->s
ize(), bitmap)) { |
| 48 return; |
| 49 } |
| 50 } |
| 51 canvas->drawBitmap(fBitmap, x, y, paint); |
| 52 } |
| 53 |
| 54 void SkImage_Codec::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const
SkRect& dst, |
| 55 const SkPaint* paint) const { |
| 56 if (!fBitmap.pixelRef()) { |
| 57 // todo: this needs to be thread-safe |
| 58 SkBitmap* bitmap = const_cast<SkBitmap*>(&fBitmap); |
| 59 if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->s
ize(), bitmap)) { |
| 60 return; |
| 61 } |
| 62 } |
| 63 canvas->drawBitmapRectToRect(fBitmap, src, dst, paint); |
| 64 } |
| 65 |
| 66 /////////////////////////////////////////////////////////////////////////////// |
| 67 |
| 68 SkImage* SkImage::NewEncodedData(SkData* data) { |
| 69 if (NULL == data) { |
| 70 return NULL; |
| 71 } |
| 72 |
| 73 SkBitmap bitmap; |
| 74 if (!SkImageDecoder::DecodeMemory(data->bytes(), data->size(), &bitmap, kUnk
nown_SkColorType, |
| 75 SkImageDecoder::kDecodeBounds_Mode)) { |
| 76 return NULL; |
| 77 } |
| 78 |
| 79 return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height())); |
| 80 } |
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