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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
static void make_bm(SkBitmap* bm) {
bm->allocN32Pixels(60, 60);
bm->eraseColor(0);
SkCanvas canvas(*bm);
SkPaint paint;
SkPath path;
path.moveTo(6, 6);
path.lineTo(6, 54);
path.lineTo(30, 54);
canvas.drawPath(path, paint);
paint.setStyle(SkPaint::kStroke_Style);
canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint);
}
// This creates a close, but imperfect concatenation of
// scaling the image up by its dst-rect
// scaling the image down by the matrix' scale
// The bug was that for cases like this, we were incorrectly trying to take a
// fast-path in the bitmapshader, but ended up drawing the last col of pixels
// twice. The fix resulted in (a) not taking the fast-path, but (b) drawing
// the image correctly.
//
static void test_bitmaprect(SkCanvas* canvas) {
SkBitmap bm;
make_bm(&bm);
canvas->drawBitmap(bm, 150, 45, NULL);
SkScalar scale = 0.472560018f;
canvas->save();
canvas->scale(scale, scale);
canvas->drawBitmapRectToRect(bm, NULL, SkRect::MakeXYWH(100, 100, 128, 128), NULL);
canvas->restore();
canvas->scale(-1, 1);
canvas->drawBitmap(bm, -310, 45, NULL);
}
class BitmapRectTestGM : public skiagm::GM {
public:
BitmapRectTestGM() {
}
protected:
virtual SkString onShortName() {
return SkString("bitmaprecttest");
}
virtual SkISize onISize() {
return SkISize::Make(320, 240);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
test_bitmaprect(canvas);
}
private:
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new BitmapRectTestGM; )
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