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
make_checker(SkBitmap * bm,int size,int numChecks)17 static void make_checker(SkBitmap* bm, int size, int numChecks) {
18 bm->allocN32Pixels(size, size);
19 for (int y = 0; y < size; ++y) {
20 for (int x = 0; x < size; ++x) {
21 SkPMColor* s = bm->getAddr32(x, y);
22 int cx = (x * numChecks) / size;
23 int cy = (y * numChecks) / size;
24 if ((cx+cy)%2) {
25 *s = 0xFFFFFFFF;
26 } else {
27 *s = 0xFF000000;
28 }
29 }
30 }
31 }
32
setTypeface(SkPaint * paint,const char name[],SkTypeface::Style style)33 static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
34 sk_tool_utils::set_portable_typeface(paint, name, style);
35 }
36
37 class DownsampleBitmapGM : public skiagm::GM {
38 public:
39 SkBitmap fBM;
40 SkString fName;
41 bool fBitmapMade;
42 SkFilterQuality fFilterQuality;
43
DownsampleBitmapGM(SkFilterQuality filterQuality)44 DownsampleBitmapGM(SkFilterQuality filterQuality)
45 : fFilterQuality(filterQuality)
46 {
47 this->setBGColor(0xFFDDDDDD);
48 fBitmapMade = false;
49 }
50
filterQualityToString()51 const char* filterQualityToString() {
52 static const char *filterQualityNames[] = {
53 "none", "low", "medium", "high"
54 };
55 return filterQualityNames[fFilterQuality];
56 }
57
58 protected:
59
onShortName()60 SkString onShortName() override {
61 return fName;
62 }
63
onISize()64 SkISize onISize() override {
65 make_bitmap_wrapper();
66 return SkISize::Make(fBM.width(), 4 * fBM.height());
67 }
68
make_bitmap_wrapper()69 void make_bitmap_wrapper() {
70 if (!fBitmapMade) {
71 fBitmapMade = true;
72 make_bitmap();
73 }
74 }
75
76 virtual void make_bitmap() = 0;
77
onDraw(SkCanvas * canvas)78 void onDraw(SkCanvas* canvas) override {
79 make_bitmap_wrapper();
80
81 int curY = 0;
82 int curHeight;
83 float curScale = 1;
84 do {
85
86 SkMatrix matrix;
87 matrix.setScale( curScale, curScale );
88
89 SkPaint paint;
90 paint.setFilterQuality(fFilterQuality);
91
92 canvas->save();
93 canvas->translate(0, (SkScalar)curY);
94 canvas->concat(matrix);
95 canvas->drawBitmap(fBM, 0, 0, &paint);
96 canvas->restore();
97
98 curHeight = (int) (fBM.height() * curScale + 2);
99 curY += curHeight;
100 curScale *= 0.75f;
101 } while (curHeight >= 2 && curY < 4*fBM.height());
102 }
103
104 private:
105 typedef skiagm::GM INHERITED;
106 };
107
108 class DownsampleBitmapTextGM: public DownsampleBitmapGM {
109 public:
DownsampleBitmapTextGM(float textSize,SkFilterQuality filterQuality)110 DownsampleBitmapTextGM(float textSize, SkFilterQuality filterQuality)
111 : INHERITED(filterQuality), fTextSize(textSize)
112 {
113 fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterQualityToString(), fTextSize);
114 }
115
116 protected:
117 float fTextSize;
118
make_bitmap()119 void make_bitmap() override {
120 fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
121 SkCanvas canvas(fBM);
122 canvas.drawColor(SK_ColorWHITE);
123
124 SkPaint paint;
125 paint.setAntiAlias(true);
126 paint.setSubpixelText(true);
127 paint.setTextSize(fTextSize);
128
129 setTypeface(&paint, "Times", SkTypeface::kNormal);
130 canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint);
131 setTypeface(&paint, "Times", SkTypeface::kBold);
132 canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint);
133 setTypeface(&paint, "Times", SkTypeface::kItalic);
134 canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint);
135 setTypeface(&paint, "Times", SkTypeface::kBoldItalic);
136 canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint);
137 }
138 private:
139 typedef DownsampleBitmapGM INHERITED;
140 };
141
142 class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
143 public:
DownsampleBitmapCheckerboardGM(int size,int numChecks,SkFilterQuality filterQuality)144 DownsampleBitmapCheckerboardGM(int size, int numChecks, SkFilterQuality filterQuality)
145 : INHERITED(filterQuality), fSize(size), fNumChecks(numChecks)
146 {
147 fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterQualityToString(), fSize, fNumChecks);
148 }
149
150 protected:
151 int fSize;
152 int fNumChecks;
153
make_bitmap()154 void make_bitmap() override {
155 make_checker(&fBM, fSize, fNumChecks);
156 }
157 private:
158 typedef DownsampleBitmapGM INHERITED;
159 };
160
161 class DownsampleBitmapImageGM: public DownsampleBitmapGM {
162 public:
DownsampleBitmapImageGM(const char filename[],SkFilterQuality filterQuality)163 DownsampleBitmapImageGM(const char filename[], SkFilterQuality filterQuality)
164 : INHERITED(filterQuality), fFilename(filename)
165 {
166 fName.printf("downsamplebitmap_image_%s_%s", this->filterQualityToString(), filename);
167 }
168
169 protected:
170 SkString fFilename;
171 int fSize;
172
make_bitmap()173 void make_bitmap() override {
174 SkImageDecoder* codec = NULL;
175 SkString resourcePath = GetResourcePath(fFilename.c_str());
176 SkFILEStream stream(resourcePath.c_str());
177 if (stream.isValid()) {
178 codec = SkImageDecoder::Factory(&stream);
179 }
180 if (codec) {
181 stream.rewind();
182 codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
183 SkDELETE(codec);
184 } else {
185 fBM.allocN32Pixels(1, 1);
186 *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
187 }
188 fSize = fBM.height();
189 }
190 private:
191 typedef DownsampleBitmapGM INHERITED;
192 };
193
194 #include "SkMipMap.h"
195
release_mipmap(void *,void * context)196 static void release_mipmap(void*, void* context) {
197 ((SkMipMap*)context)->unref();
198 }
199
200 class ShowMipLevels : public skiagm::GM {
201 public:
202 SkBitmap fBM;
203
ShowMipLevels()204 ShowMipLevels() {
205 this->setBGColor(0xFFDDDDDD);
206 make_checker(&fBM, 512, 256);
207 }
208
209 protected:
210
onShortName()211 SkString onShortName() override {
212 return SkString("showmiplevels");
213 }
214
onISize()215 SkISize onISize() override {
216 return SkISize::Make(fBM.width() + 8, 2 * fBM.height() + 80);
217 }
218
onDraw(SkCanvas * canvas)219 void onDraw(SkCanvas* canvas) override {
220 SkScalar x = 4;
221 SkScalar y = 4;
222 canvas->drawBitmap(fBM, x, y, NULL);
223 y += fBM.height() + 4;
224
225 SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(fBM, NULL));
226
227 SkMipMap::Level level;
228 SkScalar scale = 0.5f;
229 while (mm->extractLevel(scale, &level)) {
230 SkImageInfo info = SkImageInfo::MakeN32Premul(level.fWidth, level.fHeight);
231 SkBitmap bm;
232 bm.installPixels(info, level.fPixels, level.fRowBytes, NULL,
233 &release_mipmap, (void*)(SkRef(mm.get())));
234 bm.setImmutable();
235 canvas->drawBitmap(bm, x, y, NULL);
236 y += bm.height() + 4;
237 scale /= 2;
238 if (info.width() == 1 || info.height() == 1) {
239 break;
240 }
241 }
242 }
243
244 private:
245 typedef skiagm::GM INHERITED;
246 };
247 DEF_GM( return new ShowMipLevels; )
248
249 //////////////////////////////////////////////////////////////////////////////
250
251 DEF_GM( return new DownsampleBitmapTextGM(72, kHigh_SkFilterQuality); )
252 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kHigh_SkFilterQuality); )
253 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kHigh_SkFilterQuality); )
254 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
255 kHigh_SkFilterQuality); )
256
257 DEF_GM( return new DownsampleBitmapTextGM(72, kMedium_SkFilterQuality); )
258 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kMedium_SkFilterQuality); )
259 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kMedium_SkFilterQuality); )
260 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
261 kMedium_SkFilterQuality); )
262
263 DEF_GM( return new DownsampleBitmapTextGM(72, kLow_SkFilterQuality); )
264 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kLow_SkFilterQuality); )
265 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kLow_SkFilterQuality); )
266 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
267 kLow_SkFilterQuality); )
268
269 DEF_GM( return new DownsampleBitmapTextGM(72, kNone_SkFilterQuality); )
270 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kNone_SkFilterQuality); )
271 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kNone_SkFilterQuality); )
272 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
273 kNone_SkFilterQuality); )
274