humper | 535e3b2 | 2014-10-27 10:32:06 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2014 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | #include "gm.h" |
| 9 | |
| 10 | #include "Resources.h" |
| 11 | #include "SkBitmap.h" |
| 12 | #include "SkImageDecoder.h" |
| 13 | #include "SkPaint.h" |
| 14 | #include "SkShader.h" |
| 15 | #include "SkStream.h" |
| 16 | |
| 17 | |
| 18 | /*** |
| 19 | * |
| 20 | * This GM reproduces Skia bug 2904, in which a tiled bitmap shader was failing to draw correctly |
| 21 | * when fractional image scaling was ignored by the high quality bitmap scaler. |
| 22 | * |
| 23 | ***/ |
| 24 | |
| 25 | namespace skiagm { |
| 26 | |
| 27 | class TiledScaledBitmapGM : public GM { |
| 28 | public: |
| 29 | |
| 30 | TiledScaledBitmapGM() { |
| 31 | } |
| 32 | |
| 33 | protected: |
| 34 | virtual SkString onShortName() { |
| 35 | return SkString("tiledscaledbitmap"); |
| 36 | } |
| 37 | |
| 38 | virtual SkISize onISize() { |
| 39 | return SkISize::Make(1016, 616); |
| 40 | } |
| 41 | |
| 42 | virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 43 | return kSkipTiled_Flag; |
| 44 | } |
| 45 | |
| 46 | static SkBitmap make_bm(int width, int height) { |
| 47 | SkBitmap bm; |
| 48 | bm.allocN32Pixels(width, height); |
| 49 | bm.eraseColor(SK_ColorTRANSPARENT); |
| 50 | SkCanvas canvas(bm); |
| 51 | SkPaint paint; |
| 52 | paint.setAntiAlias(true); |
| 53 | canvas.drawCircle(width/2.f, height/2.f, width/4.f, paint); |
| 54 | return bm; |
| 55 | } |
| 56 | |
| 57 | virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 58 | fBitmap = make_bm(360, 288); |
| 59 | } |
| 60 | |
| 61 | virtual void onDraw(SkCanvas* canvas) { |
| 62 | SkPaint paint; |
| 63 | |
| 64 | paint.setAntiAlias(true); |
| 65 | paint.setFilterLevel(SkPaint::kHigh_FilterLevel); |
| 66 | |
| 67 | SkMatrix mat; |
| 68 | mat.setScale(121.f/360.f, 93.f/288.f); |
| 69 | mat.postTranslate(-72, -72); |
| 70 | |
| 71 | SkShader *shader = SkShader::CreateBitmapShader(fBitmap, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, &mat); |
| 72 | paint.setShader(shader); |
| 73 | |
| 74 | SkSafeUnref(shader); |
| 75 | canvas->drawRectCoords(8,8,1008, 608, paint); |
| 76 | } |
| 77 | |
| 78 | private: |
| 79 | SkBitmap fBitmap; |
| 80 | |
| 81 | typedef GM INHERITED; |
| 82 | }; |
| 83 | |
| 84 | ////////////////////////////////////////////////////////////////////////////// |
| 85 | |
| 86 | DEF_GM(return SkNEW(TiledScaledBitmapGM);) |
| 87 | |
| 88 | } |