reed@google.com | 4bc0a9d | 2012-03-07 21:47:41 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2011 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 | #include "SkCanvas.h" |
| 10 | #include "SkColorPriv.h" |
| 11 | #include "SkShader.h" |
| 12 | |
| 13 | /* |
| 14 | * Want to ensure that our bitmap sampler (in bitmap shader) keeps plenty of |
| 15 | * precision when scaling very large images (where the dx might get very small. |
| 16 | */ |
| 17 | |
| 18 | #define W 2560 |
| 19 | #define H 1600 |
| 20 | |
| 21 | class GiantBitmapGM : public skiagm::GM { |
| 22 | SkBitmap* fBM; |
| 23 | SkShader::TileMode fMode; |
| 24 | |
| 25 | const SkBitmap& getBitmap() { |
| 26 | if (NULL == fBM) { |
| 27 | fBM = new SkBitmap; |
| 28 | fBM->setConfig(SkBitmap::kARGB_8888_Config, W, H); |
| 29 | fBM->allocPixels(); |
| 30 | fBM->eraseColor(SK_ColorWHITE); |
| 31 | |
| 32 | const SkColor colors[] = { |
| 33 | SK_ColorBLUE, SK_ColorRED, SK_ColorBLACK, SK_ColorGREEN |
| 34 | }; |
| 35 | |
| 36 | SkCanvas canvas(*fBM); |
| 37 | SkPaint paint; |
| 38 | paint.setAntiAlias(true); |
| 39 | paint.setStrokeWidth(SkIntToScalar(30)); |
| 40 | for (int y = -H; y < H; y += 80) { |
| 41 | SkScalar yy = SkIntToScalar(y); |
| 42 | paint.setColor(colors[y/80 & 0x3]); |
| 43 | canvas.drawLine(0, yy, SkIntToScalar(W), yy + SkIntToScalar(W), |
| 44 | paint); |
| 45 | } |
| 46 | } |
| 47 | return *fBM; |
| 48 | } |
| 49 | |
| 50 | public: |
| 51 | GiantBitmapGM(SkShader::TileMode mode) : fBM(NULL), fMode(mode) {} |
| 52 | |
| 53 | virtual ~GiantBitmapGM() { |
| 54 | SkDELETE(fBM); |
| 55 | } |
| 56 | |
| 57 | protected: |
| 58 | |
| 59 | virtual SkString onShortName() { |
| 60 | SkString str("giantbitmap_"); |
| 61 | switch (fMode) { |
| 62 | case SkShader::kClamp_TileMode: |
| 63 | str.append("clamp"); |
| 64 | break; |
| 65 | case SkShader::kRepeat_TileMode: |
| 66 | str.append("repeat"); |
| 67 | break; |
| 68 | case SkShader::kMirror_TileMode: |
| 69 | str.append("mirror"); |
| 70 | break; |
| 71 | default: |
| 72 | break; |
| 73 | } |
| 74 | return str; |
| 75 | } |
| 76 | |
| 77 | virtual SkISize onISize() { return SkISize::Make(640, 480); } |
| 78 | |
| 79 | virtual void onDraw(SkCanvas* canvas) { |
| 80 | SkPaint paint; |
| 81 | SkShader* s = SkShader::CreateBitmapShader(getBitmap(), fMode, fMode); |
| 82 | SkMatrix m; |
| 83 | m.setScale(2*SK_Scalar1/3, 2*SK_Scalar1/3); |
| 84 | s->setLocalMatrix(m); |
| 85 | paint.setShader(s)->unref(); |
| 86 | |
| 87 | canvas->drawPaint(paint); |
| 88 | } |
| 89 | |
| 90 | private: |
| 91 | typedef GM INHERITED; |
| 92 | }; |
| 93 | |
| 94 | /////////////////////////////////////////////////////////////////////////////// |
| 95 | |
| 96 | static skiagm::GM* G0(void*) { return new GiantBitmapGM(SkShader::kClamp_TileMode); } |
| 97 | static skiagm::GM* G1(void*) { return new GiantBitmapGM(SkShader::kRepeat_TileMode); } |
| 98 | static skiagm::GM* G2(void*) { return new GiantBitmapGM(SkShader::kMirror_TileMode); } |
| 99 | |
| 100 | static skiagm::GMRegistry reg0(G0); |
| 101 | static skiagm::GMRegistry reg1(G1); |
| 102 | static skiagm::GMRegistry reg2(G2); |
| 103 | |