1 /*
2 * Copyright 2014 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 "DecodeFile.h"
9 #include "gm.h"
10
11 #include "Resources.h"
12 #include "SampleCode.h"
13 #include "SkBlurMaskFilter.h"
14 #include "SkCanvas.h"
15 #include "SkColorPriv.h"
16 #include "SkPath.h"
17 #include "SkRandom.h"
18 #include "SkStream.h"
19 #include "SkTime.h"
20 #include "SkClipOpPriv.h"
21
22 // Intended to exercise pixel snapping observed with scaled images (and
23 // with non-scaled images, but for a different reason): Bug 1145
24
25 class IdentityScaleView : public SampleView {
26 public:
IdentityScaleView(const char imageFilename[])27 IdentityScaleView(const char imageFilename[]) {
28 if (!DecodeDataToBitmap(GetResourceAsData(imageFilename), &fBM)) {
29 fBM.allocN32Pixels(1, 1);
30 *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
31 }
32 }
33
34 protected:
35 SkBitmap fBM;
36
37 // overrides from SkEventSink
onQuery(SkEvent * evt)38 bool onQuery(SkEvent* evt) override {
39 if (SampleCode::TitleQ(*evt)) {
40 SampleCode::TitleR(evt, "IdentityScale");
41 return true;
42 }
43 return this->INHERITED::onQuery(evt);
44 }
45
onDrawContent(SkCanvas * canvas)46 void onDrawContent(SkCanvas* canvas) override {
47
48 SkPaint paint;
49
50 paint.setAntiAlias(true);
51 paint.setTextSize(48);
52 paint.setFilterQuality(kHigh_SkFilterQuality);
53
54 SkTime::DateTime time;
55 SkTime::GetDateTime(&time);
56
57 bool use_scale = (time.fSecond % 2 == 1);
58 const char *text;
59
60 canvas->save();
61 if (use_scale) {
62 text = "Scaled = 1";
63 } else {
64
65 SkRect r = { 100, 100, 356, 356 };
66 SkPath clipPath;
67 clipPath.addRoundRect(r, SkIntToScalar(5), SkIntToScalar(5));
68 canvas->clipPath(clipPath, kIntersect_SkClipOp, true);
69 text = "Scaled = 0";
70 }
71 canvas->drawBitmap( fBM, 100, 100, &paint );
72 canvas->restore();
73 canvas->drawString(text, 100, 400, paint );
74 }
75
76 private:
77 typedef SampleView INHERITED;
78 };
79
80 //////////////////////////////////////////////////////////////////////////////
81
MyFactory()82 static SkView* MyFactory() { return new IdentityScaleView("images/mandrill_256.png"); }
83 static SkViewRegister reg(MyFactory);
84
