senorblanco@chromium.org | e93e1db | 2013-12-09 18:31:42 +0000 | [diff] [blame] | 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 | virtual SkString onShortName() SK_OVERRIDE { |
| 21 | return SkString("bitmapsource"); |
| 22 | } |
| 23 | |
| 24 | void makeBitmap() { |
| 25 | fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100); |
| 26 | fBitmap.allocPixels(); |
| 27 | SkBitmapDevice device(fBitmap); |
| 28 | SkCanvas canvas(&device); |
| 29 | canvas.clear(0x00000000); |
| 30 | SkPaint paint; |
| 31 | paint.setAntiAlias(true); |
| 32 | paint.setColor(0xFFFFFFFF); |
| 33 | paint.setTextSize(SkIntToScalar(96)); |
| 34 | const char* str = "e"; |
| 35 | canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint); |
| 36 | } |
| 37 | |
| 38 | virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(500, 150); } |
| 39 | |
| 40 | virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 41 | this->makeBitmap(); |
| 42 | } |
| 43 | |
| 44 | static void fillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkImageFilter* filter) { |
| 45 | SkPaint paint; |
| 46 | paint.setImageFilter(filter); |
| 47 | canvas->save(); |
| 48 | canvas->clipRect(clipRect); |
| 49 | canvas->drawPaint(paint); |
| 50 | canvas->restore(); |
| 51 | } |
| 52 | |
| 53 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 54 | canvas->clear(0x00000000); |
| 55 | { |
| 56 | SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30); |
| 57 | SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60); |
| 58 | SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100); |
| 59 | SkRect bounds; |
| 60 | fBitmap.getBounds(&bounds); |
| 61 | SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap)); |
| 62 | SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(new SkBitmapSource(fBitmap, srcRect, srcRect)); |
| 63 | SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(new SkBitmapSource(fBitmap, srcRect, dstRect)); |
| 64 | SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(new SkBitmapSource(fBitmap, bounds, dstRect)); |
| 65 | |
| 66 | // Draw an unscaled bitmap. |
| 67 | fillRectFiltered(canvas, clipRect, bitmapSource); |
| 68 | canvas->translate(SkIntToScalar(100), 0); |
| 69 | |
| 70 | // Draw an unscaled subset of the source bitmap (srcRect -> srcRect). |
| 71 | fillRectFiltered(canvas, clipRect, bitmapSourceSrcRect); |
| 72 | canvas->translate(SkIntToScalar(100), 0); |
| 73 | |
| 74 | // Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect). |
| 75 | fillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect); |
| 76 | canvas->translate(SkIntToScalar(100), 0); |
| 77 | |
| 78 | // Draw the entire bitmap scaled to a destination rect (bounds -> dstRect). |
| 79 | fillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly); |
| 80 | canvas->translate(SkIntToScalar(100), 0); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | private: |
| 85 | SkBitmap fBitmap; |
| 86 | typedef GM INHERITED; |
| 87 | }; |
| 88 | |
| 89 | /////////////////////////////////////////////////////////////////////////////// |
| 90 | |
| 91 | DEF_GM( return new BitmapSourceGM; ) |