commit-bot@chromium.org | 91a798f | 2013-09-06 15:31:06 +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 | #include "SkGradientShader.h" |
| 10 | #include "SkBitmapAlphaThresholdShader.h" |
| 11 | #include "SkTArray.h" |
| 12 | #include "SkParsePath.h" |
| 13 | |
| 14 | class BitmapAlphaThresholdGM : public skiagm::GM { |
| 15 | public: |
| 16 | BitmapAlphaThresholdGM() { |
| 17 | this->setBGColor(0xFF000000); |
| 18 | } |
| 19 | |
| 20 | private: |
| 21 | virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 22 | // narrow this flags when the shader has a CPU implementation and |
| 23 | // when it serializes. |
skia.committer@gmail.com | b3ec29d | 2013-09-07 07:01:16 +0000 | [diff] [blame] | 24 | return |
commit-bot@chromium.org | 91a798f | 2013-09-06 15:31:06 +0000 | [diff] [blame] | 25 | kSkipPDF_Flag | |
| 26 | kSkipPicture_Flag | |
| 27 | kSkipPipe_Flag | |
| 28 | kSkipPipeCrossProcess_Flag | |
| 29 | kSkipTiled_Flag | |
| 30 | kSkip565_Flag | |
| 31 | kSkipScaledReplay_Flag | |
| 32 | kSkipPDFRasterization_Flag | |
| 33 | |
| 34 | kGPUOnly_Flag; |
| 35 | } |
| 36 | |
| 37 | virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 38 | fBM.setConfig(SkBitmap::kARGB_8888_Config, 100, 100); |
| 39 | if (!fBM.allocPixels()) { |
| 40 | return; |
| 41 | } |
| 42 | SkCanvas canvas(fBM); |
| 43 | SkPoint pts[] = { {0, 0}, {SkIntToScalar(fBM.width()), SkIntToScalar(fBM.height())} }; |
| 44 | SkColor colors[] = {0x00000000, 0xffffffff}; |
| 45 | SkShader* grad = SkGradientShader::CreateLinear(pts, colors, NULL, 2, |
| 46 | SkShader::kClamp_TileMode); |
| 47 | SkPaint gradPaint; |
| 48 | gradPaint.setShader(grad)->unref(); |
| 49 | gradPaint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| 50 | canvas.drawPaint(gradPaint); |
| 51 | |
| 52 | // Construct the region used as a mask. |
| 53 | SkRegion bmpBoundsClip; |
| 54 | bmpBoundsClip.setRect(0, 0, fBM.width(), fBM.height()); |
| 55 | SkPath circlePath; |
| 56 | SkScalar radius = SkScalarSqrt(SkIntToScalar(fBM.width() * fBM.height())) / 2; |
| 57 | circlePath.addCircle(SkIntToScalar(fBM.width() / 2), |
| 58 | SkIntToScalar(fBM.height() / 2), |
| 59 | radius); |
| 60 | fMask.setPath(circlePath, bmpBoundsClip); |
| 61 | |
| 62 | SkPath batPath; |
| 63 | SkParsePath::FromSVGString( |
| 64 | "M305.214,374.779c2.463,0,3.45,0.493,3.45,0.493l1.478-6.241c0,0,1.15,4.763,1.643,9.034" |
skia.committer@gmail.com | b3ec29d | 2013-09-07 07:01:16 +0000 | [diff] [blame] | 65 | "c0.493,4.271,8.048,1.479,14.454,0.164c6.405-1.314,7.72-11.662,7.72-11.662h59.294c0,0-35.807,10.841-26.772,34.656" |
| 66 | "c0,0-52.889-8.048-61.101,24.967h-0.001c-8.212-33.015-61.101-24.967-61.101-24.967c9.034-23.815-26.772-34.656-26.772-34.656" |
| 67 | "h59.294c0,0,1.314,10.348,7.719,11.662c6.406,1.314,13.962,4.106,14.454-0.164c0.493-4.271,1.643-9.034,1.643-9.034l1.479,6.241" |
| 68 | "c0,0,0.985-0.493,3.449-0.493H305.214L305.214,374.779z", |
commit-bot@chromium.org | 91a798f | 2013-09-06 15:31:06 +0000 | [diff] [blame] | 69 | &batPath); |
| 70 | |
| 71 | SkMatrix matrix; |
| 72 | matrix.setTranslate(-208, -280); |
| 73 | matrix.postScale(radius / 100, radius / 100); |
| 74 | batPath.transform(matrix, &batPath); |
| 75 | SkRegion batRegion; |
| 76 | batRegion.setPath(batPath, bmpBoundsClip); |
| 77 | |
| 78 | fMask.op(batRegion, SkRegion::kDifference_Op); |
| 79 | } |
| 80 | |
| 81 | virtual SkString onShortName() SK_OVERRIDE { |
| 82 | return SkString("bat"); |
| 83 | } |
| 84 | |
| 85 | virtual SkISize onISize() SK_OVERRIDE { |
| 86 | return SkISize::Make(518, 735); |
| 87 | } |
| 88 | |
| 89 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 90 | |
| 91 | SkTArray<SkMatrix> lms; |
| 92 | lms.push_back().reset(); |
| 93 | lms.push_back().setScale(SK_Scalar1 / 2, SK_Scalar1); |
| 94 | lms.push_back().setScale(SK_Scalar1, 2 * SK_Scalar1); |
| 95 | lms.push_back().setRotate(-SK_Scalar1 * 30); |
| 96 | lms.push_back().setSkew(0, SK_Scalar1 / 5); |
| 97 | |
| 98 | static const SkScalar kMargin = 5 * SK_Scalar1; |
| 99 | canvas->translate(kMargin, kMargin); |
| 100 | canvas->save(); |
| 101 | |
| 102 | static const U8CPU kThresholds[] = { 0x0, 0x08, 0x40, 0x80, 0xC0, 0xF0, 0xFF }; |
| 103 | |
| 104 | for (size_t i = 0; i < SK_ARRAY_COUNT(kThresholds); ++i) { |
| 105 | for (int j = 0; j < lms.count(); ++j) { |
| 106 | SkRect rect; |
| 107 | rect.fLeft = 0; |
| 108 | rect.fTop = 0; |
| 109 | rect.fRight = SkIntToScalar(fBM.width()); |
| 110 | rect.fBottom = SkIntToScalar(fBM.height()); |
| 111 | |
| 112 | SkShader* thresh; |
| 113 | // This SkShader currently only has a GPU implementation. |
| 114 | if (canvas->getDevice()->accessRenderTarget()) { |
| 115 | thresh = SkBitmapAlphaThresholdShader::Create(fBM, fMask, kThresholds[i]); |
| 116 | } else { |
| 117 | thresh = SkShader::CreateBitmapShader(fBM, SkShader::kClamp_TileMode, |
| 118 | SkShader::kClamp_TileMode); |
| 119 | } |
| 120 | |
| 121 | thresh->setLocalMatrix(lms[j]); |
| 122 | |
| 123 | SkPaint paint; |
| 124 | paint.setShader(thresh)->unref(); |
| 125 | |
| 126 | canvas->drawRect(rect, paint); |
| 127 | canvas->translate(SkIntToScalar(fBM.width() + kMargin), 0); |
| 128 | } |
| 129 | canvas->restore(); |
| 130 | canvas->translate(0, SkIntToScalar(fBM.height() + kMargin)); |
| 131 | canvas->save(); |
| 132 | } |
| 133 | |
| 134 | } |
| 135 | |
| 136 | SkBitmap fBM; |
| 137 | SkRegion fMask; |
| 138 | |
| 139 | typedef skiagm::GM INHERITED; |
| 140 | }; |
| 141 | |
| 142 | ////////////////////////////////////////////////////////////////////////////// |
| 143 | |
| 144 | DEF_GM( return new BitmapAlphaThresholdGM(); ) |