The Tor Browser: gfx/skia/trunk/src/image/SkImage

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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  */

     8 #include "SkImageDecoder.h"

     9 #include "SkImage_Base.h"

    10 #include "SkBitmap.h"

    11 #include "SkCanvas.h"

    12 #include "SkData.h"

    14 class SkImage_Codec : public SkImage_Base {

    15 public:

    16     static SkImage* NewEmpty();

    18     SkImage_Codec(SkData* encodedData, int width, int height);

    19     virtual ~SkImage_Codec();

    21     virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE;

    22     virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) SK_OVERRIDE;

    24 private:

    25     SkData*     fEncodedData;

    26     SkBitmap    fBitmap;

    28     typedef SkImage_Base INHERITED;

    29 };

    31 ///////////////////////////////////////////////////////////////////////////////

    33 SkImage_Codec::SkImage_Codec(SkData* data, int width, int height) : INHERITED(width, height) {

    34     fEncodedData = data;

    35     fEncodedData->ref();

    36 }

    38 SkImage_Codec::~SkImage_Codec() {

    39     fEncodedData->unref();

    40 }

    42 void SkImage_Codec::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) {

    43     if (!fBitmap.pixelRef()) {

    44         if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(),

    45                                           &fBitmap)) {

    46             return;

    47         }

    48     }

    49     canvas->drawBitmap(fBitmap, x, y, paint);

    50 }

    52 void SkImage_Codec::onDrawRectToRect(SkCanvas* canvas, const SkRect* src,

    53                                      const SkRect& dst, const SkPaint* paint) {

    54     if (!fBitmap.pixelRef()) {

    55         if (!SkImageDecoder::DecodeMemory(fEncodedData->bytes(), fEncodedData->size(),

    56                                           &fBitmap)) {

    57             return;

    58         }

    59     }

    60     canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);

    61 }

    63 ///////////////////////////////////////////////////////////////////////////////

    65 SkImage* SkImage::NewEncodedData(SkData* data) {

    66     if (NULL == data) {

    67         return NULL;

    68     }

    70     SkBitmap bitmap;

    71     if (!SkImageDecoder::DecodeMemory(data->bytes(), data->size(), &bitmap,

    72                                       SkBitmap::kNo_Config,

    73                                       SkImageDecoder::kDecodeBounds_Mode)) {

    74         return NULL;

    75     }

    77     return SkNEW_ARGS(SkImage_Codec, (data, bitmap.width(), bitmap.height()));

    78 }

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