53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/*
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* Copyright 2013 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/SkImage.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkScalar.h"
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static sk_sp<SkImage> make_bm() {
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SkBitmap bm;
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bm.allocN32Pixels(60, 60);
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bm.eraseColor(0);
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SkCanvas canvas(bm);
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SkPaint paint;
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canvas.drawPath(SkPath::Polygon({{6,6}, {6,54}, {30,54}}, false), paint);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint);
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return bm.asImage();
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}
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// This creates a close, but imperfect concatenation of
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// scaling the image up by its dst-rect
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// scaling the image down by the matrix' scale
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// The bug was that for cases like this, we were incorrectly trying to take a
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// fast-path in the bitmapshader, but ended up drawing the last col of pixels
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// twice. The fix resulted in (a) not taking the fast-path, but (b) drawing
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// the image correctly.
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//
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DEF_SIMPLE_GM(bitmaprecttest, canvas, 320, 240) {
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auto image = make_bm();
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canvas->drawImage(image, 150, 45);
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SkScalar scale = 0.472560018f;
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canvas->save();
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canvas->scale(scale, scale);
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canvas->drawImageRect(image, SkRect::MakeXYWH(100, 100, 128, 128), SkSamplingOptions());
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canvas->restore();
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canvas->scale(-1, 1);
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canvas->drawImage(image, -310, 45);
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}
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