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->setConfig(SkBitmap::kARGB_8888_Config, 60, 60);
13    bm->allocPixels();
14    bm->eraseColor(0);
15
16    SkCanvas canvas(*bm);
17    SkPaint paint;
18
19    SkPath path;
20    path.moveTo(6, 6);
21    path.lineTo(6, 54);
22    path.lineTo(30, 54);
23    canvas.drawPath(path, paint);
24
25    paint.setStyle(SkPaint::kStroke_Style);
26    canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint);
27}
28
29// This creates a close, but imperfect concatenation of
30//      scaling the image up by its dst-rect
31//      scaling the image down by the matrix' scale
32//  The bug was that for cases like this, we were incorrectly trying to take a
33//  fast-path in the bitmapshader, but ended up drawing the last col of pixels
34//  twice. The fix resulted in (a) not taking the fast-path, but (b) drawing
35//  the image correctly.
36//
37static void test_bitmaprect(SkCanvas* canvas) {
38    SkBitmap bm;
39    make_bm(&bm);
40
41    canvas->drawBitmap(bm, 150, 45, NULL);
42
43    SkScalar scale = 0.472560018f;
44    canvas->save();
45    canvas->scale(scale, scale);
46    canvas->drawBitmapRectToRect(bm, NULL, SkRect::MakeXYWH(100, 100, 128, 128), NULL);
47    canvas->restore();
48
49    canvas->scale(-1, 1);
50    canvas->drawBitmap(bm, -310, 45, NULL);
51}
52
53class BitmapRectTestGM : public skiagm::GM {
54public:
55    BitmapRectTestGM() {
56
57    }
58
59protected:
60    virtual SkString onShortName() {
61        return SkString("bitmaprecttest");
62    }
63
64    virtual SkISize onISize() {
65        return SkISize::Make(320, 240);
66    }
67
68    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
69        test_bitmaprect(canvas);
70    }
71
72private:
73    typedef skiagm::GM INHERITED;
74};
75
76//////////////////////////////////////////////////////////////////////////////
77
78DEF_GM( return new BitmapRectTestGM; )
79