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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkPaint.h"
12 #include "include/core/SkPath.h"
13 #include "include/core/SkRect.h"
14 #include "include/core/SkScalar.h"
15
make_bm(SkBitmap * bm)16 static void make_bm(SkBitmap* bm) {
17 bm->allocN32Pixels(60, 60);
18 bm->eraseColor(0);
19
20 SkCanvas canvas(*bm);
21 SkPaint paint;
22 canvas.drawPath(SkPath::Polygon({{6,6}, {6,54}, {30,54}}, false), 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 //
36 DEF_SIMPLE_GM(bitmaprecttest, canvas, 320, 240) {
37 SkBitmap bm;
38 make_bm(&bm);
39
40 canvas->drawBitmap(bm, 150, 45, nullptr);
41
42 SkScalar scale = 0.472560018f;
43 canvas->save();
44 canvas->scale(scale, scale);
45 canvas->drawBitmapRect(bm, SkRect::MakeXYWH(100, 100, 128, 128), nullptr);
46 canvas->restore();
47
48 canvas->scale(-1, 1);
49 canvas->drawBitmap(bm, -310, 45, nullptr);
50 }
51