5faa2dc266
is templated on the tiling mode for speed: interior pixels are unconditionally fetched; border pixels apply the appropriate tiling mode before fetching. It handles target, bias, divisor (as gain), and edge modes (named to be more skia-like). It does not handle the "preserveAlpha" semantics of feConvolveMatrix, nor "kernelUnitLength". git-svn-id: http://skia.googlecode.com/svn/trunk@5592 2bbb7eff-a529-9590-31e7-b0007b416f81
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkMatrixConvolutionImageFilter.h"
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namespace skiagm {
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class MatrixConvolutionGM : public GM {
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public:
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MatrixConvolutionGM() : fInitialized(false) {
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this->setBGColor(0x00000000);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("matrixconvolution");
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}
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void make_bitmap() {
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fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80);
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fBitmap.allocPixels();
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SkDevice device(fBitmap);
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SkCanvas canvas(&device);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(0xFFFFFFFF);
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paint.setTextSize(SkIntToScalar(180));
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint);
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}
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virtual SkISize onISize() {
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return make_isize(300, 300);
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}
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void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target, SkMatrixConvolutionImageFilter::TileMode tileMode) {
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SkScalar kernel[9] = {
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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};
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SkISize kernelSize = SkISize::Make(3, 3);
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SkScalar gain = SkFloatToScalar(0.3f), bias = SkIntToScalar(100);
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SkPaint paint;
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SkAutoTUnref<SkImageFilter> filter(SkNEW_ARGS(SkMatrixConvolutionImageFilter, (kernelSize, kernel, gain, bias, target, tileMode)));
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paint.setImageFilter(filter);
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canvas->drawSprite(fBitmap, x, y, &paint);
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}
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virtual void onDraw(SkCanvas* canvas) {
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if (!fInitialized) {
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make_bitmap();
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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SkIPoint target = SkIPoint::Make(1, 1);
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for (target.fY = 0; target.fY < 3; ++target.fY) {
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int y = target.fY * 100 + 10;
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draw(canvas, 10, y, target, SkMatrixConvolutionImageFilter::kClamp_TileMode);
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draw(canvas, 110, y, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode);
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draw(canvas, 210, y, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode);
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}
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}
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private:
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typedef GM INHERITED;
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SkBitmap fBitmap;
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bool fInitialized;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new MatrixConvolutionGM; }
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static GMRegistry reg(MyFactory);
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}
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