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 SkDevice 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(400, 300); 48 } 49 50 void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target, SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha) { 51 SkScalar kernel[9] = { 52 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1), 53 SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1), 54 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1), 55 }; 56 SkISize kernelSize = SkISize::Make(3, 3); 57 SkScalar gain = SkFloatToScalar(0.3f), bias = SkIntToScalar(100); 58 SkPaint paint; 59 SkAutoTUnref<SkImageFilter> filter(SkNEW_ARGS(SkMatrixConvolutionImageFilter, (kernelSize, kernel, gain, bias, target, tileMode, convolveAlpha))); 60 paint.setImageFilter(filter); 61 canvas->save(); 62 canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), 63 SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()))); 64 canvas->drawBitmap(fBitmap, SkIntToScalar(x), SkIntToScalar(y), &paint); 65 canvas->restore(); 66 } 67 68 virtual void onDraw(SkCanvas* canvas) { 69 if (!fInitialized) { 70 make_bitmap(); 71 fInitialized = true; 72 } 73 canvas->clear(0x00000000); 74 SkIPoint target = SkIPoint::Make(1, 0); 75 for (int x = 10; x < 310; x += 100) { 76 draw(canvas, x, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, true); 77 draw(canvas, x, 110, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); 78 draw(canvas, x, 210, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); 79 target.fY++; 80 } 81 target.fY = 1; 82 draw(canvas, 310, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, false); 83 draw(canvas, 310, 110, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); 84 draw(canvas, 310, 210, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, false); 85 } 86 87 private: 88 typedef GM INHERITED; 89 SkBitmap fBitmap; 90 bool fInitialized; 91 }; 92 93 ////////////////////////////////////////////////////////////////////////////// 94 95 static GM* MyFactory(void*) { return new MatrixConvolutionGM; } 96 static GMRegistry reg(MyFactory); 97 98 } 99
