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 SkString resourcePath = GetResourcePath(imageFilename);
29 if (!decode_file(resourcePath.c_str(), &fBM)) {
30 fBM.allocN32Pixels(1, 1);
31 *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
32 }
33 }
34
35 protected:
36 SkBitmap fBM;
37
38 // overrides from SkEventSink
onQuery(SkEvent * evt)39 bool onQuery(SkEvent* evt) override {
40 if (SampleCode::TitleQ(*evt)) {
41 SampleCode::TitleR(evt, "IdentityScale");
42 return true;
43 }
44 return this->INHERITED::onQuery(evt);
45 }
46
onDrawContent(SkCanvas * canvas)47 void onDrawContent(SkCanvas* canvas) override {
48
49 SkPaint paint;
50
51 paint.setAntiAlias(true);
52 paint.setTextSize(48);
53 paint.setFilterQuality(kHigh_SkFilterQuality);
54
55 SkTime::DateTime time;
56 SkTime::GetDateTime(&time);
57
58 bool use_scale = (time.fSecond % 2 == 1);
59 const char *text;
60
61 canvas->save();
62 if (use_scale) {
63 text = "Scaled = 1";
64 } else {
65
66 SkRect r = { 100, 100, 356, 356 };
67 SkPath clipPath;
68 clipPath.addRoundRect(r, SkIntToScalar(5), SkIntToScalar(5));
69 canvas->clipPath(clipPath, kIntersect_SkClipOp, true);
70 text = "Scaled = 0";
71 }
72 canvas->drawBitmap( fBM, 100, 100, &paint );
73 canvas->restore();
74 canvas->drawText( text, strlen(text), 100, 400, paint );
75 this->inval(nullptr);
76 }
77
78 private:
79 typedef SampleView INHERITED;
80 };
81
82 //////////////////////////////////////////////////////////////////////////////
83
MyFactory()84 static SkView* MyFactory() { return new IdentityScaleView("mandrill_256.png"); }
85 static SkViewRegister reg(MyFactory);
86