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
10#include "Resources.h"
11#include "SkGradientShader.h"
12#include "SkTypeface.h"
13#include "SkImageDecoder.h"
14#include "SkStream.h"
15#include "SkPaint.h"
16
17static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
18    SkSafeUnref(paint->setTypeface(SkTypeface::CreateFromName(name, style)));
19}
20
21class DownsampleBitmapGM : public skiagm::GM {
22public:
23    SkBitmap    fBM;
24    SkString    fName;
25    bool        fBitmapMade;
26    SkPaint::FilterLevel fFilterLevel;
27
28    DownsampleBitmapGM(SkPaint::FilterLevel filterLevel)
29        : fFilterLevel(filterLevel)
30    {
31        this->setBGColor(0xFFDDDDDD);
32        fBitmapMade = false;
33    }
34
35    const char* filterLevelToString() {
36        static const char *filterLevelNames[] = {
37            "none", "low", "medium", "high"
38        };
39        return filterLevelNames[fFilterLevel];
40    }
41
42protected:
43    virtual uint32_t onGetFlags() const SK_OVERRIDE {
44        if (SkPaint::kHigh_FilterLevel != fFilterLevel) {
45            return kSkipTiled_Flag;
46        }
47        return 0;
48    }
49
50    virtual SkString onShortName() SK_OVERRIDE {
51        return fName;
52    }
53
54    virtual SkISize onISize() SK_OVERRIDE {
55        make_bitmap_wrapper();
56        return SkISize::Make(4 * fBM.width(), fBM.height());
57    }
58
59    void make_bitmap_wrapper() {
60        if (!fBitmapMade) {
61            fBitmapMade = true;
62            make_bitmap();
63        }
64    }
65
66    virtual void make_bitmap() = 0;
67
68    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
69        make_bitmap_wrapper();
70
71        int curX = 0;
72        int curWidth;
73        float curScale = 1;
74        do {
75
76            SkMatrix matrix;
77            matrix.setScale( curScale, curScale );
78
79            SkPaint paint;
80            paint.setFilterLevel(fFilterLevel);
81
82            canvas->save();
83            canvas->translate( (SkScalar) curX, 0.f );
84            canvas->drawBitmapMatrix( fBM, matrix, &paint );
85            canvas->restore();
86
87            curWidth = (int) (fBM.width() * curScale + 2);
88            curX += curWidth;
89            curScale *= 0.75f;
90        } while (curWidth >= 2 && curX < 4*fBM.width());
91    }
92
93private:
94    typedef skiagm::GM INHERITED;
95};
96
97class DownsampleBitmapTextGM: public DownsampleBitmapGM {
98  public:
99      DownsampleBitmapTextGM(float textSize, SkPaint::FilterLevel filterLevel)
100      : INHERITED(filterLevel), fTextSize(textSize)
101        {
102            fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterLevelToString(), fTextSize);
103        }
104
105  protected:
106      float fTextSize;
107
108      virtual void make_bitmap() SK_OVERRIDE {
109          fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
110          SkCanvas canvas(fBM);
111          canvas.drawColor(SK_ColorWHITE);
112
113          SkPaint paint;
114          paint.setAntiAlias(true);
115          paint.setSubpixelText(true);
116          paint.setTextSize(fTextSize);
117
118          setTypeface(&paint, "Times", SkTypeface::kNormal);
119          canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint);
120          setTypeface(&paint, "Times", SkTypeface::kBold);
121          canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint);
122          setTypeface(&paint, "Times", SkTypeface::kItalic);
123          canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint);
124          setTypeface(&paint, "Times", SkTypeface::kBoldItalic);
125          canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint);
126      }
127  private:
128      typedef DownsampleBitmapGM INHERITED;
129};
130
131class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
132  public:
133      DownsampleBitmapCheckerboardGM(int size, int numChecks, SkPaint::FilterLevel filterLevel)
134      : INHERITED(filterLevel), fSize(size), fNumChecks(numChecks)
135        {
136            fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterLevelToString(), fSize, fNumChecks);
137        }
138
139  protected:
140      int fSize;
141      int fNumChecks;
142
143      virtual void make_bitmap() SK_OVERRIDE {
144          fBM.allocN32Pixels(fSize, fSize);
145          for (int y = 0; y < fSize; ++y) {
146              for (int x = 0; x < fSize; ++x) {
147                  SkPMColor* s = fBM.getAddr32(x, y);
148                  int cx = (x * fNumChecks) / fSize;
149                  int cy = (y * fNumChecks) / fSize;
150                  if ((cx+cy)%2) {
151                      *s = 0xFFFFFFFF;
152                  } else {
153                      *s = 0xFF000000;
154                  }
155              }
156          }
157      }
158  private:
159      typedef DownsampleBitmapGM INHERITED;
160};
161
162class DownsampleBitmapImageGM: public DownsampleBitmapGM {
163  public:
164      DownsampleBitmapImageGM(const char filename[], SkPaint::FilterLevel filterLevel)
165      : INHERITED(filterLevel), fFilename(filename)
166        {
167            fName.printf("downsamplebitmap_image_%s_%s", this->filterLevelToString(), filename);
168        }
169
170  protected:
171      SkString fFilename;
172      int fSize;
173
174      virtual void make_bitmap() SK_OVERRIDE {
175          SkString resourcePath = GetResourcePath();
176          resourcePath.append("/");
177          resourcePath.append(fFilename);
178
179          SkImageDecoder* codec = NULL;
180          SkFILEStream stream(resourcePath.c_str());
181          if (stream.isValid()) {
182              codec = SkImageDecoder::Factory(&stream);
183          }
184          if (codec) {
185              stream.rewind();
186              codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
187              SkDELETE(codec);
188          } else {
189              fBM.allocN32Pixels(1, 1);
190              *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
191          }
192          fSize = fBM.height();
193      }
194  private:
195      typedef DownsampleBitmapGM INHERITED;
196};
197
198//////////////////////////////////////////////////////////////////////////////
199
200DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); )
201DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kHigh_FilterLevel); )
202DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kHigh_FilterLevel); )
203
204DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kMedium_FilterLevel); )
205DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kMedium_FilterLevel); )
206DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kMedium_FilterLevel); )
207
208DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kLow_FilterLevel); )
209DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kLow_FilterLevel); )
210DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kLow_FilterLevel); )
211
212DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kNone_FilterLevel); )
213DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_FilterLevel); )
214DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); )
215