| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkMatrixConvolutionImageFilter.h" |
| |
| namespace skiagm { |
| |
| class MatrixConvolutionGM : public GM { |
| public: |
| MatrixConvolutionGM() : fInitialized(false) { |
| this->setBGColor(0x00000000); |
| } |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("matrixconvolution"); |
| } |
| |
| void make_bitmap() { |
| fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80); |
| fBitmap.allocPixels(); |
| SkDevice device(fBitmap); |
| SkCanvas canvas(&device); |
| canvas.clear(0x00000000); |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setColor(0xFFFFFFFF); |
| paint.setTextSize(SkIntToScalar(180)); |
| const char* str = "e"; |
| canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint); |
| } |
| |
| virtual SkISize onISize() { |
| return make_isize(400, 300); |
| } |
| |
| void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target, SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha) { |
| SkScalar kernel[9] = { |
| SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1), |
| SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1), |
| SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1), |
| }; |
| SkISize kernelSize = SkISize::Make(3, 3); |
| SkScalar gain = SkFloatToScalar(0.3f), bias = SkIntToScalar(100); |
| SkPaint paint; |
| SkAutoTUnref<SkImageFilter> filter(SkNEW_ARGS(SkMatrixConvolutionImageFilter, (kernelSize, kernel, gain, bias, target, tileMode, convolveAlpha))); |
| paint.setImageFilter(filter); |
| canvas->drawSprite(fBitmap, x, y, &paint); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| if (!fInitialized) { |
| make_bitmap(); |
| fInitialized = true; |
| } |
| canvas->clear(0x00000000); |
| SkIPoint target = SkIPoint::Make(1, 1); |
| for (target.fY = 0; target.fY < 3; ++target.fY) { |
| int y = target.fY * 100 + 10; |
| draw(canvas, 10, y, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, true); |
| draw(canvas, 110, y, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); |
| draw(canvas, 210, y, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); |
| } |
| target.fY = 1; |
| draw(canvas, 310, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, false); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| SkBitmap fBitmap; |
| bool fInitialized; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new MatrixConvolutionGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |