/* * 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 "SkColor.h" #include "SkMatrixConvolutionImageFilter.h" #include "SkGradientShader.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)); SkPoint pts[2] = { SkPoint::Make(0, 0), SkPoint::Make(0, SkIntToScalar(80)) }; SkColor colors[2] = { 0xFFFFFFFF, 0x40404040 }; SkScalar pos[2] = { 0, SkIntToScalar(80) }; paint.setShader(SkGradientShader::CreateLinear( pts, colors, pos, 2, SkShader::kClamp_TileMode))->unref(); 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 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, 0); for (int x = 10; x < 310; x += 100) { draw(canvas, x, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, true); draw(canvas, x, 110, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); draw(canvas, x, 210, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); target.fY++; } target.fY = 1; draw(canvas, 310, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, false); draw(canvas, 310, 110, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); draw(canvas, 310, 210, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, false); } private: typedef GM INHERITED; SkBitmap fBitmap; bool fInitialized; }; ////////////////////////////////////////////////////////////////////////////// static GM* MyFactory(void*) { return new MatrixConvolutionGM; } static GMRegistry reg(MyFactory); }