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 "gm.h"
9
10#include "Resources.h"
11#include "SampleCode.h"
12#include "SkBlurMaskFilter.h"
13#include "SkCanvas.h"
14#include "SkColorPriv.h"
15#include "SkImageDecoder.h"
16#include "SkRandom.h"
17#include "SkStream.h"
18#include "SkTime.h"
19
20// Intended to exercise pixel snapping observed with scaled images (and
21// with non-scaled images, but for a different reason):  Bug 1145
22
23class IdentityScaleView : public SampleView {
24public:
25    IdentityScaleView(const char imageFilename[]) {
26      SkString resourcePath = GetResourcePath(imageFilename);
27      SkImageDecoder* codec = NULL;
28      SkFILEStream stream(resourcePath.c_str());
29      if (stream.isValid()) {
30          codec = SkImageDecoder::Factory(&stream);
31      }
32      if (codec) {
33          stream.rewind();
34          codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
35          SkDELETE(codec);
36      } else {
37          fBM.allocN32Pixels(1, 1);
38          *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
39      }
40    }
41
42protected:
43    SkBitmap fBM;
44
45    // overrides from SkEventSink
46    virtual bool onQuery(SkEvent* evt) SK_OVERRIDE {
47        if (SampleCode::TitleQ(*evt)) {
48            SampleCode::TitleR(evt, "IdentityScale");
49            return true;
50        }
51        return this->INHERITED::onQuery(evt);
52    }
53
54    virtual void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
55
56        SkPaint paint;
57
58        paint.setAntiAlias(true);
59        paint.setTextSize(48);
60        paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
61
62        SkTime::DateTime time;
63        SkTime::GetDateTime(&time);
64
65        bool use_scale = (time.fSecond % 2 == 1);
66        const char *text;
67
68        canvas->save();
69        if (use_scale) {
70          text = "Scaled = 1";
71        } else {
72
73          SkRect r = { 100, 100, 356, 356 };
74          SkPath clipPath;
75          clipPath.addRoundRect(r, SkIntToScalar(5), SkIntToScalar(5));
76          canvas->clipPath(clipPath, SkRegion::kIntersect_Op, SkToBool(1));
77          text = "Scaled = 0";
78        }
79        canvas->drawBitmap( fBM, 100, 100, &paint );
80        canvas->restore();
81        canvas->drawText( text, strlen(text), 100, 400, paint );
82        this->inval(NULL);
83    }
84
85private:
86    typedef SampleView INHERITED;
87};
88
89//////////////////////////////////////////////////////////////////////////////
90
91static SkView* MyFactory() { return new IdentityScaleView("mandrill_256.png"); }
92static SkViewRegister reg(MyFactory);
93