59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
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/*
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* Copyright 2019 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 "Resources.h"
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DEF_SIMPLE_GM(skbug_8664, canvas, 830, 550) {
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const struct {
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SkScalar fSx, fSy, fTx, fTy;
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} xforms[] = {
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{ 1, 1, 0, 0 },
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{ 0.5f, 0.5f, 530, 0 },
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{ 0.25f, 0.25f, 530, 275 },
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{ 0.125f, 0.125f, 530, 420 },
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};
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SkPaint imagePaint;
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// Must be at least medium to require mipmaps when we downscale the image
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imagePaint.setFilterQuality(kMedium_SkFilterQuality);
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sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_512.png"));
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SkPaint overlayPaint;
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overlayPaint.setColor(0x80FFFFFF);
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// Make the overlay visible even when the downscaled images fail to render
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canvas->clear(0xFF888888);
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canvas->translate(20, 20);
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for (const auto& xform : xforms) {
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canvas->save();
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canvas->translate(xform.fTx, xform.fTy);
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canvas->scale(xform.fSx, xform.fSy);
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// Draw an image, possibly down sampled, which forces us to generate mipmaps inline
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// on the second iteration.
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canvas->drawImage(image, 0, 0, &imagePaint);
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// Draw an overlay that requires the scissor test for its clipping, so that the mipmap
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// generation + scissor interference bug is highlighted in Adreno 330 devices.
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SkRect inner = SkRect::MakeLTRB(32.f, 32.f, 480.f, 480.f);
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SkRect outer = inner.makeOutset(16.f, 16.f);
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// Clip to smaller rectangle
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canvas->save();
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canvas->clipRect(inner);
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// Then apply a rotation and draw a larger rectangle to ensure the clip cannot be dropped
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canvas->rotate(20.f);
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canvas->drawRect(outer, overlayPaint);
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canvas->restore();
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canvas->restore();
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}
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}
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