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| 1 /* | |
| 2 * Copyright 2013 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 "gm.h" | |
| 9 | |
| 10 #include "SkBitmapSource.h" | |
| 11 | |
| 12 // This GM exercises the SkBitmapSource ImageFilter class. | |
| 13 | |
| 14 class BitmapSourceGM : public skiagm::GM { | |
| 15 public: | |
| 16 BitmapSourceGM() { | |
| 17 } | |
| 18 | |
| 19 protected: | |
| 20 SkString onShortName() override { | |
| 21 return SkString("bitmapsource"); | |
| 22 } | |
| 23 | |
| 24 SkISize onISize() override { return SkISize::Make(500, 150); } | |
| 25 | |
| 26 void onOnceBeforeDraw() override { | |
| 27 fBitmap = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20,
70, 96, "e"); | |
| 28 } | |
| 29 | |
| 30 static void FillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkIma
geFilter* filter) { | |
| 31 SkPaint paint; | |
| 32 paint.setImageFilter(filter); | |
| 33 canvas->save(); | |
| 34 canvas->clipRect(clipRect); | |
| 35 canvas->drawPaint(paint); | |
| 36 canvas->restore(); | |
| 37 } | |
| 38 | |
| 39 void onDraw(SkCanvas* canvas) override { | |
| 40 canvas->clear(SK_ColorBLACK); | |
| 41 { | |
| 42 SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30); | |
| 43 SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60); | |
| 44 SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100); | |
| 45 SkRect bounds; | |
| 46 fBitmap.getBounds(&bounds); | |
| 47 SkAutoTUnref<SkImageFilter> bitmapSource(SkBitmapSource::Create(fBit
map)); | |
| 48 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(SkBitmapSource::Crea
te(fBitmap, srcRect, srcRect)); | |
| 49 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(SkBitmapSourc
e::Create(fBitmap, srcRect, dstRect)); | |
| 50 SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(SkBitmapSource::
Create(fBitmap, bounds, dstRect)); | |
| 51 | |
| 52 // Draw an unscaled bitmap. | |
| 53 FillRectFiltered(canvas, clipRect, bitmapSource); | |
| 54 canvas->translate(SkIntToScalar(100), 0); | |
| 55 | |
| 56 // Draw an unscaled subset of the source bitmap (srcRect -> srcRect)
. | |
| 57 FillRectFiltered(canvas, clipRect, bitmapSourceSrcRect); | |
| 58 canvas->translate(SkIntToScalar(100), 0); | |
| 59 | |
| 60 // Draw a subset of the bitmap scaled to a destination rect (srcRect
-> dstRect). | |
| 61 FillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect); | |
| 62 canvas->translate(SkIntToScalar(100), 0); | |
| 63 | |
| 64 // Draw the entire bitmap scaled to a destination rect (bounds -> ds
tRect). | |
| 65 FillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly); | |
| 66 canvas->translate(SkIntToScalar(100), 0); | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 private: | |
| 71 SkBitmap fBitmap; | |
| 72 typedef GM INHERITED; | |
| 73 }; | |
| 74 | |
| 75 /////////////////////////////////////////////////////////////////////////////// | |
| 76 | |
| 77 DEF_GM( return new BitmapSourceGM; ) | |
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