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1 /*
2  * Copyright 2011 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 "SkImageDecoder.h"
13 #include "SkStream.h"
14 #include "SkTypeface.h"
15 
setTypeface(SkPaint * paint,const char name[],SkTypeface::Style style)16 static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
17     sk_tool_utils::set_portable_typeface(paint, name, style);
18 }
19 
computeSize(const SkBitmap & bm,const SkMatrix & mat)20 static SkSize computeSize(const SkBitmap& bm, const SkMatrix& mat) {
21     SkRect bounds = SkRect::MakeWH(SkIntToScalar(bm.width()),
22                                    SkIntToScalar(bm.height()));
23     mat.mapRect(&bounds);
24     return SkSize::Make(bounds.width(), bounds.height());
25 }
26 
draw_cell(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx,SkFilterQuality lvl)27 static void draw_cell(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx,
28                       SkFilterQuality lvl) {
29     SkPaint paint;
30     paint.setFilterQuality(lvl);
31 
32     SkAutoCanvasRestore acr(canvas, true);
33     canvas->translate(dx, 0);
34     canvas->concat(mat);
35     canvas->drawBitmap(bm, 0, 0, &paint);
36 }
37 
draw_row(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx)38 static void draw_row(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx) {
39     draw_cell(canvas, bm, mat, 0 * dx, kNone_SkFilterQuality);
40     draw_cell(canvas, bm, mat, 1 * dx, kLow_SkFilterQuality);
41     draw_cell(canvas, bm, mat, 2 * dx, kMedium_SkFilterQuality);
42     draw_cell(canvas, bm, mat, 3 * dx, kHigh_SkFilterQuality);
43 }
44 
45 class FilterBitmapGM : public skiagm::GM {
onOnceBeforeDraw()46     void onOnceBeforeDraw() override {
47 
48         this->makeBitmap();
49 
50         SkScalar cx = SkScalarHalf(fBM.width());
51         SkScalar cy = SkScalarHalf(fBM.height());
52         SkScalar scale = this->getScale();
53 
54         // these two matrices use a scale factor configured by the subclass
55         fMatrix[0].setScale(scale, scale);
56         fMatrix[1].setRotate(30, cx, cy); fMatrix[1].postScale(scale, scale);
57 
58         // up/down scaling mix
59         fMatrix[2].setScale(0.7f, 1.05f);
60     }
61 
62 public:
63     SkBitmap    fBM;
64     SkMatrix    fMatrix[3];
65     SkString    fName;
66 
FilterBitmapGM()67     FilterBitmapGM()
68     {
69         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
70     }
71 
72 protected:
73 
onShortName()74     SkString onShortName() override {
75         return fName;
76     }
77 
onISize()78     SkISize onISize() override {
79         return SkISize::Make(1024, 768);
80     }
81 
82     virtual void makeBitmap() = 0;
83     virtual SkScalar getScale() = 0;
84 
onDraw(SkCanvas * canvas)85     void onDraw(SkCanvas* canvas) override {
86 
87         canvas->translate(10, 10);
88         for (size_t i = 0; i < SK_ARRAY_COUNT(fMatrix); ++i) {
89             SkSize size = computeSize(fBM, fMatrix[i]);
90             size.fWidth += 20;
91             size.fHeight += 20;
92 
93             draw_row(canvas, fBM, fMatrix[i], size.fWidth);
94             canvas->translate(0, size.fHeight);
95         }
96     }
97 
98 private:
99     typedef skiagm::GM INHERITED;
100 };
101 
102 class FilterBitmapTextGM: public FilterBitmapGM {
103   public:
FilterBitmapTextGM(float textSize)104       FilterBitmapTextGM(float textSize)
105       : fTextSize(textSize)
106         {
107             fName.printf("filterbitmap_text_%.2fpt", fTextSize);
108         }
109 
110   protected:
111       float fTextSize;
112 
getScale()113       SkScalar getScale() override {
114           return 32.f/fTextSize;
115       }
116 
makeBitmap()117       void makeBitmap() override {
118           fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
119           SkCanvas canvas(fBM);
120           canvas.drawColor(SK_ColorWHITE);
121 
122           SkPaint paint;
123           paint.setAntiAlias(true);
124           paint.setSubpixelText(true);
125           paint.setTextSize(fTextSize);
126 
127           setTypeface(&paint, "serif", SkTypeface::kNormal);
128           canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint);
129           setTypeface(&paint, "serif", SkTypeface::kBold);
130           canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint);
131           setTypeface(&paint, "serif", SkTypeface::kItalic);
132           canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint);
133           setTypeface(&paint, "serif", SkTypeface::kBoldItalic);
134           canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint);
135       }
136   private:
137       typedef FilterBitmapGM INHERITED;
138 };
139 
140 class FilterBitmapCheckerboardGM: public FilterBitmapGM {
141 public:
FilterBitmapCheckerboardGM(int size,int num_checks,bool convertToG8=false)142     FilterBitmapCheckerboardGM(int size, int num_checks, bool convertToG8 = false)
143         : fSize(size), fNumChecks(num_checks), fConvertToG8(convertToG8)
144     {
145         fName.printf("filterbitmap_checkerboard_%d_%d%s",
146                      fSize, fNumChecks, convertToG8 ? "_g8" : "");
147     }
148 
149   protected:
150       int fSize;
151       int fNumChecks;
152 
getScale()153       SkScalar getScale() override {
154           return 192.f/fSize;
155       }
156 
makeBitmap()157       void makeBitmap() override {
158           fBM.allocN32Pixels(fSize, fSize);
159           for (int y = 0; y < fSize; y ++) {
160               for (int x = 0; x < fSize; x ++) {
161                   SkPMColor* s = fBM.getAddr32(x, y);
162                   int cx = (x * fNumChecks) / fSize;
163                   int cy = (y * fNumChecks) / fSize;
164                   if ((cx+cy)%2) {
165                       *s = 0xFFFFFFFF;
166                   } else {
167                       *s = 0xFF000000;
168                   }
169               }
170           }
171           if (fConvertToG8) {
172               SkBitmap tmp;
173               fBM.copyTo(&tmp, kGray_8_SkColorType);
174               fBM = tmp;
175           }
176       }
177 private:
178     const bool fConvertToG8;
179     typedef FilterBitmapGM INHERITED;
180 };
181 
182 class FilterBitmapImageGM: public FilterBitmapGM {
183 public:
FilterBitmapImageGM(const char filename[],bool convertToG8=false)184     FilterBitmapImageGM(const char filename[], bool convertToG8 = false)
185         : fFilename(filename), fConvertToG8(convertToG8)
186     {
187         fName.printf("filterbitmap_image_%s%s", filename, convertToG8 ? "_g8" : "");
188     }
189 
190 protected:
191       SkString fFilename;
192       int fSize;
193 
getScale()194       SkScalar getScale() override {
195           return 192.f/fSize;
196       }
197 
makeBitmap()198       void makeBitmap() override {
199           SkImageDecoder* codec = nullptr;
200           SkString resourcePath = GetResourcePath(fFilename.c_str());
201           SkFILEStream stream(resourcePath.c_str());
202           if (stream.isValid()) {
203               codec = SkImageDecoder::Factory(&stream);
204           }
205           if (codec) {
206               stream.rewind();
207               codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
208               delete codec;
209           } else {
210               fBM.allocN32Pixels(1, 1);
211               *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
212           }
213           fSize = fBM.height();
214           if (fConvertToG8) {
215               SkBitmap tmp;
216               fBM.copyTo(&tmp, kGray_8_SkColorType);
217               fBM = tmp;
218           }
219       }
220 private:
221     const bool fConvertToG8;
222     typedef FilterBitmapGM INHERITED;
223 };
224 
225 //////////////////////////////////////////////////////////////////////////////
226 
227 DEF_GM( return new FilterBitmapTextGM(3); )
228 DEF_GM( return new FilterBitmapTextGM(7); )
229 DEF_GM( return new FilterBitmapTextGM(10); )
230 DEF_GM( return new FilterBitmapCheckerboardGM(4,4); )
231 DEF_GM( return new FilterBitmapCheckerboardGM(32,32); )
232 DEF_GM( return new FilterBitmapCheckerboardGM(32,32, true); )
233 DEF_GM( return new FilterBitmapCheckerboardGM(32,8); )
234 DEF_GM( return new FilterBitmapCheckerboardGM(32,2); )
235 DEF_GM( return new FilterBitmapCheckerboardGM(192,192); )
236 DEF_GM( return new FilterBitmapImageGM("mandrill_16.png"); )
237 DEF_GM( return new FilterBitmapImageGM("mandrill_32.png"); )
238 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png"); )
239 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png", true); )
240 DEF_GM( return new FilterBitmapImageGM("mandrill_128.png"); )
241 DEF_GM( return new FilterBitmapImageGM("mandrill_256.png"); )
242 DEF_GM( return new FilterBitmapImageGM("mandrill_512.png"); )
243 DEF_GM( return new FilterBitmapImageGM("color_wheel.png"); )
244