1 /* 2 * Copyright 2012 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 "SkColor.h" 10 #include "SkMatrixConvolutionImageFilter.h" 11 #include "SkGradientShader.h" 12 13 namespace skiagm { 14 15 class MatrixConvolutionGM : public GM { 16 public: 17 MatrixConvolutionGM() : fInitialized(false) { 18 this->setBGColor(0x00000000); 19 } 20 21 protected: 22 virtual SkString onShortName() { 23 return SkString("matrixconvolution"); 24 } 25 26 void make_bitmap() { 27 fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80); 28 fBitmap.allocPixels(); 29 SkBitmapDevice device(fBitmap); 30 SkCanvas canvas(&device); 31 canvas.clear(0x00000000); 32 SkPaint paint; 33 paint.setAntiAlias(true); 34 paint.setColor(0xFFFFFFFF); 35 paint.setTextSize(SkIntToScalar(180)); 36 SkPoint pts[2] = { SkPoint::Make(0, 0), 37 SkPoint::Make(0, SkIntToScalar(80)) }; 38 SkColor colors[2] = { 0xFFFFFFFF, 0x40404040 }; 39 SkScalar pos[2] = { 0, SkIntToScalar(80) }; 40 paint.setShader(SkGradientShader::CreateLinear( 41 pts, colors, pos, 2, SkShader::kClamp_TileMode))->unref(); 42 const char* str = "e"; 43 canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint); 44 } 45 46 virtual SkISize onISize() { 47 return make_isize(500, 300); 48 } 49 50 void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target, 51 SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha, 52 const SkImageFilter::CropRect* cropRect = NULL) { 53 SkScalar kernel[9] = { 54 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1), 55 SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1), 56 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1), 57 }; 58 SkISize kernelSize = SkISize::Make(3, 3); 59 SkScalar gain = 0.3f, bias = SkIntToScalar(100); 60 SkPaint paint; 61 SkAutoTUnref<SkImageFilter> filter( 62 SkNEW_ARGS(SkMatrixConvolutionImageFilter, (kernelSize, 63 kernel, 64 gain, 65 bias, 66 target, 67 tileMode, 68 convolveAlpha, 69 NULL, 70 cropRect))); 71 paint.setImageFilter(filter); 72 canvas->save(); 73 canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); 74 canvas->clipRect(SkRect::MakeWH(SkIntToScalar(fBitmap.width()), 75 SkIntToScalar(fBitmap.height()))); 76 canvas->drawBitmap(fBitmap, 0, 0, &paint); 77 canvas->restore(); 78 } 79 80 typedef SkMatrixConvolutionImageFilter MCIF; 81 82 virtual void onDraw(SkCanvas* canvas) { 83 if (!fInitialized) { 84 make_bitmap(); 85 fInitialized = true; 86 } 87 canvas->clear(0x00000000); 88 SkIPoint target = SkIPoint::Make(1, 0); 89 for (int x = 10; x < 310; x += 100) { 90 this->draw(canvas, x, 10, target, MCIF::kClamp_TileMode, true); 91 this->draw(canvas, x, 110, target, MCIF::kClampToBlack_TileMode, true); 92 this->draw(canvas, x, 210, target, MCIF::kRepeat_TileMode, true); 93 target.fY++; 94 } 95 target.fY = 1; 96 SkImageFilter::CropRect rect(SkRect::MakeXYWH(10, 5, 60, 60)); 97 this->draw(canvas, 310, 10, target, MCIF::kClamp_TileMode, true, &rect); 98 this->draw(canvas, 310, 110, target, MCIF::kClampToBlack_TileMode, true, &rect); 99 this->draw(canvas, 310, 210, target, MCIF::kRepeat_TileMode, true, &rect); 100 101 this->draw(canvas, 410, 10, target, MCIF::kClamp_TileMode, false); 102 this->draw(canvas, 410, 110, target, MCIF::kClampToBlack_TileMode, false); 103 this->draw(canvas, 410, 210, target, MCIF::kRepeat_TileMode, false); 104 } 105 106 private: 107 typedef GM INHERITED; 108 SkBitmap fBitmap; 109 bool fInitialized; 110 }; 111 112 ////////////////////////////////////////////////////////////////////////////// 113 114 static GM* MyFactory(void*) { return new MatrixConvolutionGM; } 115 static GMRegistry reg(MyFactory); 116 117 } 118
