sk_tool_utils.cpp revision 2cbcd12281ee807214df094964c584c78932e10b 
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 "sk_tool_utils.h"
9#include "sk_tool_utils_flags.h"
10
11#include "Resources.h"
12#include "SkBitmap.h"
13#include "SkCanvas.h"
14#include "SkCommonFlags.h"
15#include "SkFontMgr.h"
16#include "SkFontStyle.h"
17#include "SkPoint3.h"
18#include "SkShader.h"
19#include "SkTestScalerContext.h"
20#include "SkTextBlob.h"
21
22DEFINE_bool(portableFonts, false, "Use portable fonts");
23
24namespace sk_tool_utils {
25
26/* these are the default fonts chosen by Chrome for serif, sans-serif, and monospace */
27static const char* gStandardFontNames[][3] = {
28    { "Times", "Helvetica", "Courier" }, // Mac
29    { "Times New Roman", "Helvetica", "Courier" }, // iOS
30    { "Times New Roman", "Arial", "Courier New" }, // Win
31    { "Times New Roman", "Arial", "Monospace" }, // Ubuntu
32    { "serif", "sans-serif", "monospace" }, // Android
33    { "Tinos", "Arimo", "Cousine" } // ChromeOS
34};
35
36const char* platform_font_name(const char* name) {
37    SkString platform = major_platform_os_name();
38    int index;
39    if (!strcmp(name, "serif")) {
40        index = 0;
41    } else if (!strcmp(name, "san-serif")) {
42        index = 1;
43    } else if (!strcmp(name, "monospace")) {
44        index = 2;
45    } else {
46        return name;
47    }
48    if (platform.equals("Mac")) {
49        return gStandardFontNames[0][index];
50    }
51    if (platform.equals("iOS")) {
52        return gStandardFontNames[1][index];
53    }
54    if (platform.equals("Win")) {
55        return gStandardFontNames[2][index];
56    }
57    if (platform.equals("Ubuntu")) {
58        return gStandardFontNames[3][index];
59    }
60    if (platform.equals("Android")) {
61        return gStandardFontNames[4][index];
62    }
63    if (platform.equals("ChromeOS")) {
64        return gStandardFontNames[5][index];
65    }
66    return name;
67}
68
69const char* platform_os_emoji() {
70    const char* osName = platform_os_name();
71    if (!strcmp(osName, "Android") || !strcmp(osName, "Ubuntu")) {
72        return "CBDT";
73    }
74    if (!strncmp(osName, "Mac", 3) || !strncmp(osName, "iOS", 3)) {
75        return "SBIX";
76    }
77    if (!strncmp(osName, "Win", 3)) {
78        return "COLR";
79    }
80    return "";
81}
82
83sk_sp<SkTypeface> emoji_typeface() {
84    if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) {
85        return MakeResourceAsTypeface("/fonts/Funkster.ttf");
86    }
87    if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) {
88        return SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle());
89    }
90    if (!strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) {
91        sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
92        const char *colorEmojiFontName = "Segoe UI Emoji";
93        sk_sp<SkTypeface> typeface(fm->matchFamilyStyle(colorEmojiFontName, SkFontStyle()));
94        if (typeface) {
95            return typeface;
96        }
97        sk_sp<SkTypeface> fallback(fm->matchFamilyStyleCharacter(
98            colorEmojiFontName, SkFontStyle(), nullptr /* bcp47 */, 0 /* bcp47Count */,
99            0x1f4b0 /* character: �� */));
100        if (fallback) {
101            return fallback;
102        }
103        // If we don't have Segoe UI Emoji and can't find a fallback, try Segoe UI Symbol.
104        // Windows 7 does not have Segoe UI Emoji; Segoe UI Symbol has the (non - color) emoji.
105        return SkTypeface::MakeFromName("Segoe UI Symbol", SkFontStyle());
106    }
107    return nullptr;
108}
109
110const char* emoji_sample_text() {
111    if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) {
112        return "Hamburgefons";
113    }
114    if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX") ||
115        !strcmp(sk_tool_utils::platform_os_emoji(), "COLR"))
116    {
117        return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85"  // ������
118               "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80"  // ������
119               "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // ������
120               "\xF0\x9F\x93\xA6" // ��
121               "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // ������
122    }
123    return "";
124}
125
126const char* platform_os_name() {
127    for (int index = 0; index < FLAGS_key.count(); index += 2) {
128        if (!strcmp("os", FLAGS_key[index])) {
129            return FLAGS_key[index + 1];
130        }
131    }
132    // when running SampleApp or dm without a --key pair, omit the platform name
133    return "";
134}
135
136// omit version number in returned value
137SkString major_platform_os_name() {
138    SkString name;
139    for (int index = 0; index < FLAGS_key.count(); index += 2) {
140        if (!strcmp("os", FLAGS_key[index])) {
141            const char* platform = FLAGS_key[index + 1];
142            const char* end = platform;
143            while (*end && (*end < '0' || *end > '9')) {
144                ++end;
145            }
146            name.append(platform, end - platform);
147            break;
148        }
149    }
150    return name;
151}
152
153const char* platform_extra_config(const char* config) {
154    for (int index = 0; index < FLAGS_key.count(); index += 2) {
155        if (!strcmp("extra_config", FLAGS_key[index]) && !strcmp(config, FLAGS_key[index + 1])) {
156            return config;
157        }
158    }
159    return "";
160}
161
162const char* colortype_name(SkColorType ct) {
163    switch (ct) {
164        case kUnknown_SkColorType:      return "Unknown";
165        case kAlpha_8_SkColorType:      return "Alpha_8";
166        case kIndex_8_SkColorType:      return "Index_8";
167        case kARGB_4444_SkColorType:    return "ARGB_4444";
168        case kRGB_565_SkColorType:      return "RGB_565";
169        case kRGBA_8888_SkColorType:    return "RGBA_8888";
170        case kBGRA_8888_SkColorType:    return "BGRA_8888";
171        default:
172            SkASSERT(false);
173            return "unexpected colortype";
174    }
175}
176
177SkColor color_to_565(SkColor color) {
178    SkPMColor pmColor = SkPreMultiplyColor(color);
179    U16CPU color16 = SkPixel32ToPixel16(pmColor);
180    return SkPixel16ToColor(color16);
181}
182
183sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style) {
184    return create_font(name, style);
185}
186
187void set_portable_typeface(SkPaint* paint, const char* name, SkFontStyle style) {
188    paint->setTypeface(create_font(name, style));
189}
190
191void write_pixels(SkCanvas* canvas, const SkBitmap& bitmap, int x, int y,
192                  SkColorType colorType, SkAlphaType alphaType) {
193    SkBitmap tmp(bitmap);
194    tmp.lockPixels();
195
196    const SkImageInfo info = SkImageInfo::Make(tmp.width(), tmp.height(), colorType, alphaType);
197
198    canvas->writePixels(info, tmp.getPixels(), tmp.rowBytes(), x, y);
199}
200
201sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) {
202    SkBitmap bm;
203    bm.allocPixels(SkImageInfo::MakeS32(2 * size, 2 * size, kPremul_SkAlphaType));
204    bm.eraseColor(c1);
205    bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
206    bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
207    return SkShader::MakeBitmapShader(
208            bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
209}
210
211SkBitmap create_checkerboard_bitmap(int w, int h, SkColor c1, SkColor c2, int checkSize) {
212    SkBitmap bitmap;
213    bitmap.allocPixels(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType));
214    SkCanvas canvas(bitmap);
215
216    sk_tool_utils::draw_checkerboard(&canvas, c1, c2, checkSize);
217    return bitmap;
218}
219
220void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) {
221    SkPaint paint;
222    paint.setShader(create_checkerboard_shader(c1, c2, size));
223    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
224    canvas->drawPaint(paint);
225}
226
227SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y,
228                              int textSize, const char* str) {
229    SkBitmap bitmap;
230    bitmap.allocN32Pixels(w, h);
231    SkCanvas canvas(bitmap);
232
233    SkPaint paint;
234    paint.setAntiAlias(true);
235    sk_tool_utils::set_portable_typeface(&paint);
236    paint.setColor(c);
237    paint.setTextSize(SkIntToScalar(textSize));
238
239    canvas.clear(0x00000000);
240    canvas.drawText(str, strlen(str), SkIntToScalar(x), SkIntToScalar(y), paint);
241
242    return bitmap;
243}
244
245void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint,
246                      SkScalar x, SkScalar y) {
247    SkPaint paint(origPaint);
248    SkTDArray<uint16_t> glyphs;
249
250    size_t len = strlen(text);
251    glyphs.append(paint.textToGlyphs(text, len, nullptr));
252    paint.textToGlyphs(text, len, glyphs.begin());
253
254    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
255    const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y,
256                                                                nullptr);
257    memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t));
258}
259
260static inline void norm_to_rgb(SkBitmap* bm, int x, int y, const SkVector3& norm) {
261    SkASSERT(SkScalarNearlyEqual(norm.length(), 1.0f));
262    unsigned char r = static_cast<unsigned char>((0.5f * norm.fX + 0.5f) * 255);
263    unsigned char g = static_cast<unsigned char>((-0.5f * norm.fY + 0.5f) * 255);
264    unsigned char b = static_cast<unsigned char>((0.5f * norm.fZ + 0.5f) * 255);
265    *bm->getAddr32(x, y) = SkPackARGB32(0xFF, r, g, b);
266}
267
268void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst) {
269    const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f),
270                                         dst.fTop + (dst.height() / 2.0f));
271    const SkPoint halfSize = SkPoint::Make(dst.width() / 2.0f, dst.height() / 2.0f);
272
273    SkVector3 norm;
274
275    for (int y = dst.fTop; y < dst.fBottom; ++y) {
276        for (int x = dst.fLeft; x < dst.fRight; ++x) {
277            norm.fX = (x + 0.5f - center.fX) / halfSize.fX;
278            norm.fY = (y + 0.5f - center.fY) / halfSize.fY;
279
280            SkScalar tmp = norm.fX * norm.fX + norm.fY * norm.fY;
281            if (tmp >= 1.0f) {
282                norm.set(0.0f, 0.0f, 1.0f);
283            } else {
284                norm.fZ = sqrtf(1.0f - tmp);
285            }
286
287            norm_to_rgb(bm, x, y, norm);
288        }
289    }
290}
291
292void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst) {
293    const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f),
294                                         dst.fTop + (dst.height() / 2.0f));
295
296    SkIRect inner = dst;
297    inner.inset(dst.width()/4, dst.height()/4);
298
299    SkPoint3 norm;
300    const SkPoint3 left =  SkPoint3::Make(-SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2);
301    const SkPoint3 up =    SkPoint3::Make(0.0f, -SK_ScalarRoot2Over2, SK_ScalarRoot2Over2);
302    const SkPoint3 right = SkPoint3::Make(SK_ScalarRoot2Over2,  0.0f, SK_ScalarRoot2Over2);
303    const SkPoint3 down =  SkPoint3::Make(0.0f,  SK_ScalarRoot2Over2, SK_ScalarRoot2Over2);
304
305    for (int y = dst.fTop; y < dst.fBottom; ++y) {
306        for (int x = dst.fLeft; x < dst.fRight; ++x) {
307            if (inner.contains(x, y)) {
308                norm.set(0.0f, 0.0f, 1.0f);
309            } else {
310                SkScalar locX = x + 0.5f - center.fX;
311                SkScalar locY = y + 0.5f - center.fY;
312
313                if (locX >= 0.0f) {
314                    if (locY > 0.0f) {
315                        norm = locX >= locY ? right : down;   // LR corner
316                    } else {
317                        norm = locX > -locY ? right : up;     // UR corner
318                    }
319                } else {
320                    if (locY > 0.0f) {
321                        norm = -locX > locY ? left : down;    // LL corner
322                    } else {
323                        norm = locX > locY ? up : left;       // UL corner
324                    }
325                }
326            }
327
328            norm_to_rgb(bm, x, y, norm);
329        }
330    }
331}
332
333void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst) {
334    const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f),
335                                         dst.fTop + (dst.height() / 2.0f));
336
337    static const SkScalar k1OverRoot3 = 0.5773502692f;
338
339    SkPoint3 norm;
340    const SkPoint3 leftUp =  SkPoint3::Make(-k1OverRoot3, -k1OverRoot3, k1OverRoot3);
341    const SkPoint3 rightUp = SkPoint3::Make(k1OverRoot3,  -k1OverRoot3, k1OverRoot3);
342    const SkPoint3 down =  SkPoint3::Make(0.0f,  SK_ScalarRoot2Over2, SK_ScalarRoot2Over2);
343
344    for (int y = dst.fTop; y < dst.fBottom; ++y) {
345        for (int x = dst.fLeft; x < dst.fRight; ++x) {
346            SkScalar locX = x + 0.5f - center.fX;
347            SkScalar locY = y + 0.5f - center.fY;
348
349            if (locX >= 0.0f) {
350                if (locY > 0.0f) {
351                    norm = locX >= locY ? rightUp : down;   // LR corner
352                } else {
353                    norm = rightUp;
354                }
355            } else {
356                if (locY > 0.0f) {
357                    norm = -locX > locY ? leftUp : down;    // LL corner
358                } else {
359                    norm = leftUp;
360                }
361            }
362
363            norm_to_rgb(bm, x, y, norm);
364        }
365    }
366}
367
368void make_big_path(SkPath& path) {
369    #include "BigPathBench.inc"
370}
371
372static float gaussian2d_value(int x, int y, float sigma) {
373    // don't bother with the scale term since we're just going to normalize the
374    // kernel anyways
375    float temp = expf(-(x*x + y*y)/(2*sigma*sigma));
376    return temp;
377}
378
379static float* create_2d_kernel(float sigma, int* filterSize) {
380    // We will actually take 2*halfFilterSize+1 samples (i.e., our filter kernel
381    // sizes are always odd)
382    int halfFilterSize = SkScalarCeilToInt(6*sigma)/2;
383    int wh = *filterSize = 2*halfFilterSize + 1;
384
385    float* temp = new float[wh*wh];
386
387    float filterTot = 0.0f;
388    for (int yOff = 0; yOff < wh; ++yOff) {
389        for (int xOff = 0; xOff < wh; ++xOff) {
390            temp[yOff*wh+xOff] = gaussian2d_value(xOff-halfFilterSize, yOff-halfFilterSize, sigma);
391
392            filterTot += temp[yOff*wh+xOff];
393        }
394    }
395
396    // normalize the kernel
397    for (int yOff = 0; yOff < wh; ++yOff) {
398        for (int xOff = 0; xOff < wh; ++xOff) {
399            temp[yOff*wh+xOff] /= filterTot;
400        }
401    }
402
403    return temp;
404}
405
406static SkPMColor blur_pixel(const SkBitmap& bm, int x, int y, float* kernel, int wh) {
407    SkASSERT(wh & 0x1);
408
409    int halfFilterSize = (wh-1)/2;
410
411    float r = 0.0f, g = 0.0f, b = 0.0f;
412    for (int yOff = 0; yOff < wh; ++yOff) {
413        int ySamp = y + yOff - halfFilterSize;
414
415        if (ySamp < 0) {
416            ySamp = 0;
417        } else if (ySamp > bm.height()-1) {
418            ySamp = bm.height()-1;
419        }
420
421        for (int xOff = 0; xOff < wh; ++xOff) {
422            int xSamp = x + xOff - halfFilterSize;
423
424            if (xSamp < 0) {
425                xSamp = 0;
426            } else if (xSamp > bm.width()-1) {
427                xSamp = bm.width()-1;
428            }
429
430            float filter = kernel[yOff*wh + xOff];
431
432            SkPMColor c = *bm.getAddr32(xSamp, ySamp);
433
434            r += SkGetPackedR32(c) * filter;
435            g += SkGetPackedG32(c) * filter;
436            b += SkGetPackedB32(c) * filter;
437        }
438    }
439
440    U8CPU r8, g8, b8;
441
442    r8 = (U8CPU) (r+0.5f);
443    g8 = (U8CPU) (g+0.5f);
444    b8 = (U8CPU) (b+0.5f);
445
446    return SkPackARGB32(255, r8, g8, b8);
447}
448
449SkBitmap slow_blur(const SkBitmap& src, float sigma) {
450    SkBitmap dst;
451
452    dst.allocN32Pixels(src.width(), src.height(), true);
453
454    int wh;
455    SkAutoTDeleteArray<float> kernel(create_2d_kernel(sigma, &wh));
456
457    for (int y = 0; y < src.height(); ++y) {
458        for (int x = 0; x < src.width(); ++x) {
459            *dst.getAddr32(x, y) = blur_pixel(src, x, y, kernel.get(), wh);
460        }
461    }
462
463    return dst;
464}
465
466// compute the intersection point between the diagonal and the ellipse in the
467// lower right corner
468static SkPoint intersection(SkScalar w, SkScalar h) {
469    SkASSERT(w > 0.0f || h > 0.0f);
470
471    return SkPoint::Make(w / SK_ScalarSqrt2, h / SK_ScalarSqrt2);
472}
473
474// Use the intersection of the corners' diagonals with their ellipses to shrink
475// the bounding rect
476SkRect compute_central_occluder(const SkRRect& rr) {
477    const SkRect r = rr.getBounds();
478
479    SkScalar newL = r.fLeft, newT = r.fTop, newR = r.fRight, newB = r.fBottom;
480
481    SkVector radii = rr.radii(SkRRect::kUpperLeft_Corner);
482    if (!radii.isZero()) {
483        SkPoint p = intersection(radii.fX, radii.fY);
484
485        newL = SkTMax(newL, r.fLeft + radii.fX - p.fX);
486        newT = SkTMax(newT, r.fTop + radii.fY - p.fY);
487    }
488
489    radii = rr.radii(SkRRect::kUpperRight_Corner);
490    if (!radii.isZero()) {
491        SkPoint p = intersection(radii.fX, radii.fY);
492
493        newR = SkTMin(newR, r.fRight + p.fX - radii.fX);
494        newT = SkTMax(newT, r.fTop + radii.fY - p.fY);
495    }
496
497    radii = rr.radii(SkRRect::kLowerRight_Corner);
498    if (!radii.isZero()) {
499        SkPoint p = intersection(radii.fX, radii.fY);
500
501        newR = SkTMin(newR, r.fRight + p.fX - radii.fX);
502        newB = SkTMin(newB, r.fBottom - radii.fY + p.fY);
503    }
504
505    radii = rr.radii(SkRRect::kLowerLeft_Corner);
506    if (!radii.isZero()) {
507        SkPoint p = intersection(radii.fX, radii.fY);
508
509        newL = SkTMax(newL, r.fLeft + radii.fX - p.fX);
510        newB = SkTMin(newB, r.fBottom - radii.fY + p.fY);
511    }
512
513    return SkRect::MakeLTRB(newL, newT, newR, newB);
514}
515
516// The widest inset rect
517SkRect compute_widest_occluder(const SkRRect& rr) {
518    const SkRect& r = rr.getBounds();
519
520    const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner);
521    const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner);
522    const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner);
523    const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner);
524
525    SkScalar maxT = SkTMax(ul.fY, ur.fY);
526    SkScalar maxB = SkTMax(ll.fY, lr.fY);
527
528    return SkRect::MakeLTRB(r.fLeft, r.fTop + maxT, r.fRight, r.fBottom - maxB);
529
530}
531
532// The tallest inset rect
533SkRect compute_tallest_occluder(const SkRRect& rr) {
534    const SkRect& r = rr.getBounds();
535
536    const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner);
537    const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner);
538    const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner);
539    const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner);
540
541    SkScalar maxL = SkTMax(ul.fX, ll.fX);
542    SkScalar maxR = SkTMax(ur.fX, lr.fX);
543
544    return SkRect::MakeLTRB(r.fLeft + maxL, r.fTop, r.fRight - maxR, r.fBottom);
545}
546
547
548}  // namespace sk_tool_utils
549