96 lines
2.9 KiB
C++
96 lines
2.9 KiB
C++
/*
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* Copyright 2014 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 "SkColor.h"
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#include "SkImageFilter.h"
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namespace skiagm {
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class MatrixImageFilterGM : public GM {
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public:
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MatrixImageFilterGM() {
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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("matriximagefilter");
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}
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void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap,
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const SkMatrix& matrix, SkFilterQuality filter) {
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SkAutoTUnref<SkImageFilter> imageFilter(
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SkImageFilter::CreateMatrixFilter(matrix, filter));
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SkPaint paint;
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paint.setImageFilter(imageFilter.get());
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canvas->saveLayer(&rect, &paint);
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canvas->drawBitmap(bitmap, 0, 0);
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canvas->restore();
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}
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virtual SkISize onISize() {
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return SkISize::Make(420, 100);
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}
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void make_checkerboard(SkBitmap* bitmap) {
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bitmap->allocN32Pixels(64, 64);
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SkCanvas canvas(*bitmap);
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SkPaint darkPaint;
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darkPaint.setColor(0xFF404040);
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SkPaint lightPaint;
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lightPaint.setColor(0xFFA0A0A0);
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for (int y = 0; y < 64; y += 32) {
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for (int x = 0; x < 64; x += 32) {
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canvas.save();
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canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas.drawRect(SkRect::MakeXYWH(0, 0, 16, 16), darkPaint);
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canvas.drawRect(SkRect::MakeXYWH(16, 0, 16, 16), lightPaint);
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canvas.drawRect(SkRect::MakeXYWH(0, 16, 16, 16), lightPaint);
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canvas.drawRect(SkRect::MakeXYWH(16, 16, 16, 16), darkPaint);
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canvas.restore();
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}
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}
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}
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virtual void onDraw(SkCanvas* canvas) {
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canvas->clear(0x00000000);
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SkMatrix matrix;
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SkScalar margin = SkIntToScalar(10);
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matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2));
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SkBitmap checkerboard;
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make_checkerboard(&checkerboard);
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SkRect srcRect = SkRect::MakeWH(96, 96);
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canvas->translate(margin, margin);
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draw(canvas, srcRect, checkerboard, matrix, kNone_SkFilterQuality);
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canvas->translate(srcRect.width() + margin, 0);
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draw(canvas, srcRect, checkerboard, matrix, kLow_SkFilterQuality);
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#if 0
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// This may be causing Mac 10.6 to barf.
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canvas->translate(srcRect.width() + margin, 0);
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draw(canvas, srcRect, checkerboard, matrix, kMedium_SkFilterQuality);
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canvas->translate(srcRect.width() + margin, 0);
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draw(canvas, srcRect, checkerboard, matrix, kHigh_SkFilterQuality);
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#endif
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new MatrixImageFilterGM; }
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static GMRegistry reg(MyFactory);
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}
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