1/*
2 * Copyright 2013 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "gm.h"
9#include "SkCanvas.h"
10
11static void make_bm(SkBitmap* bm) {
12    bm->allocN32Pixels(60, 60);
13    bm->eraseColor(0);
14
15    SkCanvas canvas(*bm);
16    SkPaint paint;
17
18    SkPath path;
19    path.moveTo(6, 6);
20    path.lineTo(6, 54);
21    path.lineTo(30, 54);
22    canvas.drawPath(path, paint);
23
24    paint.setStyle(SkPaint::kStroke_Style);
25    canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint);
26}
27
28// This creates a close, but imperfect concatenation of
29//      scaling the image up by its dst-rect
30//      scaling the image down by the matrix' scale
31//  The bug was that for cases like this, we were incorrectly trying to take a
32//  fast-path in the bitmapshader, but ended up drawing the last col of pixels
33//  twice. The fix resulted in (a) not taking the fast-path, but (b) drawing
34//  the image correctly.
35//
36static void test_bitmaprect(SkCanvas* canvas) {
37    SkBitmap bm;
38    make_bm(&bm);
39
40    canvas->drawBitmap(bm, 150, 45, NULL);
41
42    SkScalar scale = 0.472560018f;
43    canvas->save();
44    canvas->scale(scale, scale);
45    canvas->drawBitmapRectToRect(bm, NULL, SkRect::MakeXYWH(100, 100, 128, 128), NULL);
46    canvas->restore();
47
48    canvas->scale(-1, 1);
49    canvas->drawBitmap(bm, -310, 45, NULL);
50}
51
52class BitmapRectTestGM : public skiagm::GM {
53public:
54    BitmapRectTestGM() {
55
56    }
57
58protected:
59    virtual uint32_t onGetFlags() const SK_OVERRIDE {
60        return kSkipTiled_Flag;
61    }
62
63    virtual SkString onShortName() {
64        return SkString("bitmaprecttest");
65    }
66
67    virtual SkISize onISize() {
68        return SkISize::Make(320, 240);
69    }
70
71    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
72        test_bitmaprect(canvas);
73    }
74
75private:
76    typedef skiagm::GM INHERITED;
77};
78
79//////////////////////////////////////////////////////////////////////////////
80
81DEF_GM( return new BitmapRectTestGM; )
82