82 lines
2.0 KiB
C++
82 lines
2.0 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/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTileMode.h"
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/***
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*
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* This GM reproduces Skia bug 2904, in which a tiled bitmap shader was failing to draw correctly
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* when fractional image scaling was ignored by the high quality bitmap scaler.
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*
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***/
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namespace skiagm {
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class TiledScaledBitmapGM : public GM {
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public:
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TiledScaledBitmapGM() {
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}
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protected:
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SkString onShortName() override {
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return SkString("tiledscaledbitmap");
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}
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SkISize onISize() override {
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return SkISize::Make(1016, 616);
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}
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static SkBitmap make_bm(int width, int height) {
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SkBitmap bm;
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bm.allocN32Pixels(width, height);
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bm.eraseColor(SK_ColorTRANSPARENT);
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SkCanvas canvas(bm);
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SkPaint paint;
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paint.setAntiAlias(true);
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canvas.drawCircle(width/2.f, height/2.f, width/4.f, paint);
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return bm;
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}
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void onOnceBeforeDraw() override {
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fBitmap = make_bm(360, 288);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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SkMatrix mat;
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mat.setScale(121.f/360.f, 93.f/288.f);
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mat.postTranslate(-72, -72);
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paint.setShader(fBitmap.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
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SkSamplingOptions(SkCubicResampler::Mitchell()), mat));
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canvas->drawRect({ 8, 8, 1008, 608 }, paint);
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}
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private:
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SkBitmap fBitmap;
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using INHERITED = GM;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new TiledScaledBitmapGM;)
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} // namespace skiagm
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