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35 lines
1.4 KiB
35 lines
1.4 KiB
4 months ago
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/*
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* Copyright 2020 Google LLC
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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/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkMatrix.h"
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DEF_SIMPLE_GM(crbug_10141204, canvas, 512, 512) {
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// While the coordinates are giant and the transform is not axis-aligned, this should
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// fill the screen left side with solid blue. This has an extra zoom factor compared to the
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// canvas JS in order to more visibly highlight the numerical issues that caused the bug.
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// (The original transform would have completely filled the screen with solid blue, so the bug
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// manifested as an improper discard on occasion. With the new scale factor, the bug manifests
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// as either an improper fullscreen clear or an improper discard, instead).
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SkScalar extraZoom = exp(-2.3f);
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canvas->scale(extraZoom, extraZoom);
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canvas->scale(2.f, 2.f);
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canvas->concat(SkMatrix::MakeAll(
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-0.0005550860255665798f, -0.0030798374421905717f, -0.014111959825129805f,
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-0.07569627776417084f, 232.00000000000017f, 39.999999999999936f,
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0.f, 0.f, 1.f));
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canvas->translate(-3040103.0493857153f, 337502.1103282161f);
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canvas->scale(9783.93962050256f, -9783.93962050256f);
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(true);
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canvas->drawRect(SkRect::MakeWH(512, 512), paint);
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}
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