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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkFilterQuality.h"
13 #include "include/core/SkFont.h"
14 #include "include/core/SkFontStyle.h"
15 #include "include/core/SkMatrix.h"
16 #include "include/core/SkPaint.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkScalar.h"
19 #include "include/core/SkSize.h"
20 #include "include/core/SkString.h"
21 #include "include/core/SkTypeface.h"
22 #include "include/core/SkTypes.h"
23 #include "tools/Resources.h"
24 #include "tools/ToolUtils.h"
25 
setTypeface(SkFont * font,const char name[],SkFontStyle style)26 static void setTypeface(SkFont* font, const char name[], SkFontStyle style) {
27     font->setTypeface(ToolUtils::create_portable_typeface(name, style));
28 }
29 
computeSize(const SkBitmap & bm,const SkMatrix & mat)30 static SkSize computeSize(const SkBitmap& bm, const SkMatrix& mat) {
31     SkRect bounds = SkRect::MakeWH(SkIntToScalar(bm.width()),
32                                    SkIntToScalar(bm.height()));
33     mat.mapRect(&bounds);
34     return SkSize::Make(bounds.width(), bounds.height());
35 }
36 
draw_cell(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx,SkFilterQuality lvl)37 static void draw_cell(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx,
38                       SkFilterQuality lvl) {
39     SkPaint paint;
40     paint.setFilterQuality(lvl);
41 
42     SkAutoCanvasRestore acr(canvas, true);
43     canvas->translate(dx, 0);
44     canvas->concat(mat);
45     canvas->drawBitmap(bm, 0, 0, &paint);
46 }
47 
draw_row(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx)48 static void draw_row(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx) {
49     draw_cell(canvas, bm, mat, 0 * dx, kNone_SkFilterQuality);
50     draw_cell(canvas, bm, mat, 1 * dx, kLow_SkFilterQuality);
51     draw_cell(canvas, bm, mat, 2 * dx, kMedium_SkFilterQuality);
52     draw_cell(canvas, bm, mat, 3 * dx, kHigh_SkFilterQuality);
53 }
54 
55 class FilterBitmapGM : public skiagm::GM {
onOnceBeforeDraw()56     void onOnceBeforeDraw() override {
57         this->setBGColor(0xFFDDDDDD);
58 
59         this->makeBitmap();
60         fBM.setImmutable();
61 
62         SkScalar cx = SkScalarHalf(fBM.width());
63         SkScalar cy = SkScalarHalf(fBM.height());
64         SkScalar scale = this->getScale();
65 
66         // these two matrices use a scale factor configured by the subclass
67         fMatrix[0].setScale(scale, scale);
68         fMatrix[1].setRotate(30, cx, cy); fMatrix[1].postScale(scale, scale);
69 
70         // up/down scaling mix
71         fMatrix[2].setScale(0.7f, 1.05f);
72     }
73 
74 protected:
75     SkBitmap    fBM;
76     SkMatrix    fMatrix[3];
77 
onISize()78     SkISize onISize() override { return SkISize::Make(1024, 768); }
79 
80     virtual void makeBitmap() = 0;
81     virtual SkScalar getScale() = 0;
82 
onDraw(SkCanvas * canvas)83     void onDraw(SkCanvas* canvas) override {
84 
85         canvas->translate(10, 10);
86         for (size_t i = 0; i < SK_ARRAY_COUNT(fMatrix); ++i) {
87             SkSize size = computeSize(fBM, fMatrix[i]);
88             size.fWidth += 20;
89             size.fHeight += 20;
90 
91             draw_row(canvas, fBM, fMatrix[i], size.fWidth);
92             canvas->translate(0, size.fHeight);
93         }
94     }
95 };
96 
97 class FilterBitmapTextGM: public FilterBitmapGM {
98 public:
FilterBitmapTextGM(float textSize)99       FilterBitmapTextGM(float textSize) : fTextSize(textSize) {}
100 
101 private:
onShortName()102       SkString onShortName() override {
103           return SkStringPrintf("filterbitmap_text_%.2fpt", fTextSize);
104       }
105       const float fTextSize;
106 
getScale()107       SkScalar getScale() override {
108           return 32.f/fTextSize;
109       }
110 
makeBitmap()111       void makeBitmap() override {
112           fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
113           SkCanvas canvas(fBM);
114           canvas.drawColor(SK_ColorWHITE);
115 
116           SkPaint paint;
117           SkFont font;
118           font.setSize(fTextSize);
119           font.setSubpixel(true);
120 
121           setTypeface(&font, "serif", SkFontStyle::Normal());
122           canvas.drawString("Hamburgefons", fTextSize/2, 1.2f*fTextSize, font, paint);
123           setTypeface(&font, "serif", SkFontStyle::Bold());
124           canvas.drawString("Hamburgefons", fTextSize/2, 2.4f*fTextSize, font, paint);
125           setTypeface(&font, "serif", SkFontStyle::Italic());
126           canvas.drawString("Hamburgefons", fTextSize/2, 3.6f*fTextSize, font, paint);
127           setTypeface(&font, "serif", SkFontStyle::BoldItalic());
128           canvas.drawString("Hamburgefons", fTextSize/2, 4.8f*fTextSize, font, paint);
129       }
130 };
131 
132 class FilterBitmapCheckerboardGM: public FilterBitmapGM {
onShortName()133     SkString onShortName() override {
134         return SkStringPrintf("filterbitmap_checkerboard_%d_%d%s",
135                               fSize, fNumChecks, fConvertToG8 ? "_g8" : "");
136     }
137 public:
FilterBitmapCheckerboardGM(int size,int num_checks,bool convertToG8=false)138     FilterBitmapCheckerboardGM(int size, int num_checks, bool convertToG8 = false)
139         : fSize(size), fNumChecks(num_checks), fConvertToG8(convertToG8) {}
140 
141 protected:
142       int fSize;
143       int fNumChecks;
144 
getScale()145       SkScalar getScale() override {
146           return 192.f/fSize;
147       }
148 
makeBitmap()149       void makeBitmap() override {
150           fBM.allocN32Pixels(fSize, fSize);
151           for (int y = 0; y < fSize; y ++) {
152               for (int x = 0; x < fSize; x ++) {
153                   SkPMColor* s = fBM.getAddr32(x, y);
154                   int cx = (x * fNumChecks) / fSize;
155                   int cy = (y * fNumChecks) / fSize;
156                   if ((cx+cy)%2) {
157                       *s = 0xFFFFFFFF;
158                   } else {
159                       *s = 0xFF000000;
160                   }
161               }
162           }
163           if (fConvertToG8) {
164               SkBitmap tmp;
165               ToolUtils::copy_to_g8(&tmp, fBM);
166               fBM = tmp;
167           }
168       }
169 private:
170     const bool fConvertToG8;
171     using INHERITED = FilterBitmapGM;
172 };
173 
174 class FilterBitmapImageGM: public FilterBitmapGM {
175     const char* fFilename;
176     int fSize;
177 
onShortName()178     SkString onShortName() override {
179         return SkStringPrintf("filterbitmap_image_%s%s", fFilename, fConvertToG8 ? "_g8" : "");
180     }
181 
182 public:
FilterBitmapImageGM(const char filename[],bool convertToG8=false)183     FilterBitmapImageGM(const char filename[], bool convertToG8 = false)
184         : fFilename(filename), fConvertToG8(convertToG8) {}
185 
186 protected:
getScale()187       SkScalar getScale() override {
188           return 192.f/fSize;
189       }
190 
makeBitmap()191       void makeBitmap() override {
192         SkString resource = SkStringPrintf("images/%s", fFilename);
193         if (!GetResourceAsBitmap(resource.c_str(), &fBM)) {
194             fBM.allocN32Pixels(1, 1);
195             fBM.eraseARGB(255, 255, 0 , 0); // red == bad
196         }
197         fSize = fBM.height();
198 
199         if (fConvertToG8) {
200             SkBitmap tmp;
201             ToolUtils::copy_to_g8(&tmp, fBM);
202             fBM = tmp;
203         }
204       }
205 private:
206     const bool fConvertToG8;
207     using INHERITED = FilterBitmapGM;
208 };
209 
210 //////////////////////////////////////////////////////////////////////////////
211 
212 DEF_GM( return new FilterBitmapTextGM(3); )
213 DEF_GM( return new FilterBitmapTextGM(7); )
214 DEF_GM( return new FilterBitmapTextGM(10); )
215 DEF_GM( return new FilterBitmapCheckerboardGM(4,4); )
216 DEF_GM( return new FilterBitmapCheckerboardGM(32,32); )
217 DEF_GM( return new FilterBitmapCheckerboardGM(32,32, true); )
218 DEF_GM( return new FilterBitmapCheckerboardGM(32,8); )
219 DEF_GM( return new FilterBitmapCheckerboardGM(32,2); )
220 DEF_GM( return new FilterBitmapCheckerboardGM(192,192); )
221 DEF_GM( return new FilterBitmapImageGM("mandrill_16.png"); )
222 DEF_GM( return new FilterBitmapImageGM("mandrill_32.png"); )
223 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png"); )
224 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png", true); )
225 DEF_GM( return new FilterBitmapImageGM("mandrill_128.png"); )
226 DEF_GM( return new FilterBitmapImageGM("mandrill_256.png"); )
227 DEF_GM( return new FilterBitmapImageGM("mandrill_512.png"); )
228 DEF_GM( return new FilterBitmapImageGM("color_wheel.png"); )
229