a5517e2b19
Follow-on work - unify around SrcRectConstraint (i.e. drawBitmapRect) - remove silly drawBitmapRectToRect alias - clean-up (possibly remove) alias problems around drawBitmapRect + IRect parameter BUG=skia: Review URL: https://codereview.chromium.org/1228083004
78 lines
1.8 KiB
C++
78 lines
1.8 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.h"
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#include "SkCanvas.h"
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static void make_bm(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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SkPath path;
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path.moveTo(6, 6);
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path.lineTo(6, 54);
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path.lineTo(30, 54);
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canvas.drawPath(path, 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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}
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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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static void test_bitmaprect(SkCanvas* canvas) {
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SkBitmap bm;
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make_bm(&bm);
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canvas->drawBitmap(bm, 150, 45, NULL);
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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->drawBitmapRect(bm, SkRect::MakeXYWH(100, 100, 128, 128));
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canvas->restore();
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canvas->scale(-1, 1);
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canvas->drawBitmap(bm, -310, 45, NULL);
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}
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class BitmapRectTestGM : public skiagm::GM {
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public:
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BitmapRectTestGM() {
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}
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protected:
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SkString onShortName() override {
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return SkString("bitmaprecttest");
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}
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SkISize onISize() override {
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return SkISize::Make(320, 240);
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}
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void onDraw(SkCanvas* canvas) override {
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test_bitmaprect(canvas);
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new BitmapRectTestGM; )
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