aboutsummaryrefslogtreecommitdiffhomepage
path: root/tools/create_test_font.cpp
blob: 5e4f6bc9fc439512073b2fd5ec86d3b2d291ce4b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

// running create_test_font generates ./tools/test_font_data.cpp
// which is read by ./tools/sk_tool_utils_font.cpp

#include "Resources.h"
#include "SkOSFile.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkStream.h"
#include "SkTArray.h"
#include "SkTSort.h"
#include "SkTypeface.h"
#include "SkUtils.h"
#include <stdio.h>

// the folllowing include is generated by running dm with
//   --portableFonts --reportUsedChars
#include "test_font_data_chars.cpp"

#define DEFAULT_FONT_NAME "Liberation Sans"

static struct FontDesc {
    const char* fName;
    SkTypeface::Style fStyle;
    const char* fFont;
    const char* fFile;
    const char* fCharsUsed;
    int fFontIndex;
} gFonts[] = {
    {"Courier New", SkTypeface::kNormal, "Courier New",     "Courier New.ttf",
            gCourierNew, -1},
    {"Courier New", SkTypeface::kBold,   "Courier New",     "Courier New Bold.ttf",
            gCourierNew_Bold, -1},
    {"Courier New", SkTypeface::kItalic, "Courier New",     "Courier New Italic.ttf",
            gCourierNew_Italic, -1},
    {"Courier New", SkTypeface::kBoldItalic, "Courier New", "Courier New Bold Italic.ttf",
            gCourierNew_BoldItalic, -1},
    {"Helvetica",   SkTypeface::kNormal, "Liberation Sans", "LiberationSans-Regular.ttf",
            gLiberationSans, -1},
    {"Helvetica",  SkTypeface::kBold,    "Liberation Sans", "LiberationSans-Bold.ttf",
            gLiberationSans_Bold, -1},
    {"Helvetica",  SkTypeface::kItalic,  "Liberation Sans", "LiberationSans-Italic.ttf",
            gLiberationSans_Italic, -1},
    {"Helvetica",  SkTypeface::kBoldItalic, "Liberation Sans", "LiberationSans-BoldItalic.ttf",
            gLiberationSans_BoldItalic, -1},
    {"Hiragino Maru Gothic Pro", SkTypeface::kNormal, "Hiragino Maru Gothic Pro", "Pro W4.otf",
            gHiraginoMaruGothicPro, -1},
    {"Liberation Sans", SkTypeface::kNormal, "Liberation Sans", "LiberationSans-Regular.ttf",
            gLiberationSans, -1},
    {"Liberation Sans", SkTypeface::kBold,   "Liberation Sans", "LiberationSans-Bold.ttf",
            gLiberationSans_Bold, -1},
    {"Liberation Sans", SkTypeface::kItalic, "Liberation Sans", "LiberationSans-Italic.ttf",
            gLiberationSans_Italic, -1},
    {"Liberation Sans", SkTypeface::kBoldItalic, "Liberation Sans", "LiberationSans-BoldItalic.ttf",
            gLiberationSans_BoldItalic, -1},
    {"monospace",   SkTypeface::kNormal, "Courier New",     "Courier New.ttf",
            gCourierNew, -1},
    {"monospace",   SkTypeface::kBold,   "Courier New",     "Courier New Bold.ttf",
            gCourierNew_Bold, -1},
    {"monospace",   SkTypeface::kItalic, "Courier New",     "Courier New Italic.ttf",
            gCourierNew_Italic, -1},
    {"monospace",   SkTypeface::kBoldItalic, "Courier New", "Courier New Bold Italic.ttf",
            gCourierNew_BoldItalic, -1},
    {"Papyrus",     SkTypeface::kNormal, "Papyrus",         "Papyrus.ttc",
            gPapyrus, -1},
    {"sans-serif",  SkTypeface::kNormal, "Liberation Sans", "LiberationSans-Regular.ttf",
            gLiberationSans, -1},
    {"sans-serif",  SkTypeface::kBold,   "Liberation Sans", "LiberationSans-Bold.ttf",
            gLiberationSans_Bold, -1},
    {"sans-serif",  SkTypeface::kItalic, "Liberation Sans", "LiberationSans-Italic.ttf",
            gLiberationSans_Italic, -1},
    {"sans-serif", SkTypeface::kBoldItalic, "Liberation Sans", "LiberationSans-BoldItalic.ttf",
            gLiberationSans_BoldItalic, -1},
    {"serif",       SkTypeface::kNormal, "Times New Roman", "Times New Roman.ttf",
            gTimesNewRoman, -1},
    {"serif",       SkTypeface::kBold,   "Times New Roman", "Times New Roman Bold.ttf",
            gTimesNewRoman_Bold, -1},
    {"serif",       SkTypeface::kItalic, "Times New Roman", "Times New Roman Italic.ttf",
            gTimesNewRoman_Italic, -1},
    {"serif",   SkTypeface::kBoldItalic, "Times New Roman", "Times New Roman Bold Italic.ttf",
            gTimesNewRoman_BoldItalic, -1},
    {"Times",       SkTypeface::kNormal, "Times New Roman", "Times New Roman.ttf",
            gTimesNewRoman, -1},
    {"Times",       SkTypeface::kBold,   "Times New Roman", "Times New Roman Bold.ttf",
            gTimesNewRoman_Bold, -1},
    {"Times",       SkTypeface::kItalic, "Times New Roman", "Times New Roman Italic.ttf",
            gTimesNewRoman_Italic, -1},
    {"Times",   SkTypeface::kBoldItalic, "Times New Roman", "Times New Roman Bold Italic.ttf",
            gTimesNewRoman_BoldItalic, -1},
    {"Times New Roman", SkTypeface::kNormal, "Times New Roman", "Times New Roman.ttf",
            gTimesNewRoman, -1},
    {"Times New Roman", SkTypeface::kBold,   "Times New Roman", "Times New Roman Bold.ttf",
            gTimesNewRoman_Bold, -1},
    {"Times New Roman", SkTypeface::kItalic, "Times New Roman", "Times New Roman Italic.ttf",
            gTimesNewRoman_Italic, -1},
    {"Times New Roman", SkTypeface::kBoldItalic, "Times New Roman", "Times New Roman Bold Italic.ttf",
            gTimesNewRoman_BoldItalic, -1},
    {"Times Roman", SkTypeface::kNormal, "Liberation Sans", "LiberationSans-Regular.ttf",
            gLiberationSans, -1},
};

const int gFontsCount = (int) SK_ARRAY_COUNT(gFonts);

const char* gStyleName[] = {
    "kNormal",
    "kBold",
    "kItalic",
    "kBoldItalic",
};

const char gHeader[] =
"/*\n"
" * Copyright 2014 Google Inc.\n"
" *\n"
" * Use of this source code is governed by a BSD-style license that can be\n"
" * found in the LICENSE file.\n"
" */\n"
"\n"
"// Auto-generated by ";

static FILE* font_header() {
    SkString outPath(SkOSPath::Join(".", "tools"));
    outPath = SkOSPath::Join(outPath.c_str(), "test_font_data.cpp");
    FILE* out = fopen(outPath.c_str(), "w");
    fprintf(out, "%s%s\n\n", gHeader, SkOSPath::Basename(__FILE__).c_str());
    return out;
}

enum {
    kMaxLineLength = 80,
};

static ptrdiff_t last_line_length(const SkString& str) {
    const char* first = str.c_str();
    const char* last = first + str.size();
    const char* ptr = last;
    while (ptr > first && *--ptr != '\n')
        ;
    return last - ptr - 1;
}

static void output_fixed(SkScalar num, int emSize, SkString* out) {
    int hex = (int) (num * 65536 / emSize);
    out->appendf("0x%08x,", hex);
    *out += (int) last_line_length(*out) >= kMaxLineLength ? '\n' : ' ';
}

static void output_scalar(SkScalar num, int emSize, SkString* out) {
    num /= emSize;
    if (num == (int) num) {
       out->appendS32((int) num);
    } else {
        SkString str;
        str.printf("%1.6g", num);
        int width = (int) str.size();
        const char* cStr = str.c_str();
        while (cStr[width - 1] == '0') {
            --width;
        }
        str.remove(width, str.size() - width);
        out->appendf("%sf", str.c_str());
    }
    *out += ',';
    *out += (int) last_line_length(*out) >= kMaxLineLength ? '\n' : ' ';
}

static int output_points(const SkPoint* pts, int emSize, int count, SkString* ptsOut) {
    for (int index = 0; index < count; ++index) {
//        SkASSERT(floor(pts[index].fX) == pts[index].fX);
        output_scalar(pts[index].fX, emSize, ptsOut);
//        SkASSERT(floor(pts[index].fY) == pts[index].fY);
        output_scalar(pts[index].fY, emSize, ptsOut);
    }
    return count;
}

static void output_path_data(const SkPaint& paint, const char* used,
        int emSize, SkString* ptsOut, SkTDArray<SkPath::Verb>* verbs,
        SkTDArray<unsigned>* charCodes, SkTDArray<SkScalar>* widths) {
   while (*used) {
        SkUnichar index = SkUTF8_NextUnichar(&used);
        SkPath path;
        paint.getTextPath((const void*) &index, 2, 0, 0, &path);
        SkPath::RawIter iter(path);
        SkPath::Verb verb;
        SkPoint pts[4];
        while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
            *verbs->append() = verb;
            switch (verb) {
                case SkPath::kMove_Verb:
                    output_points(&pts[0], emSize, 1, ptsOut);
                    break;
                case SkPath::kLine_Verb:
                    output_points(&pts[1], emSize, 1, ptsOut);
                    break;
                case SkPath::kQuad_Verb:
                    output_points(&pts[1], emSize, 2, ptsOut);
                    break;
                case SkPath::kCubic_Verb:
                    output_points(&pts[1], emSize, 3, ptsOut);
                    break;
                case SkPath::kClose_Verb:
                    break;
                default:
                    SkDEBUGFAIL("bad verb");
                    SkASSERT(0);
            }
        }
        *verbs->append() = SkPath::kDone_Verb;
        *charCodes->append() = index;
        SkScalar width;
        SkDEBUGCODE(int charCount =) paint.getTextWidths((const void*) &index, 2, &width);
        SkASSERT(charCount == 1);
//        SkASSERT(floor(width) == width);  // not true for Hiragino Maru Gothic Pro
        *widths->append() = width;
    }
}

static int offset_str_len(unsigned num) {
    if (num == (unsigned) -1) {
        return 10;
    }
    unsigned result = 1;
    unsigned ref = 10;
    while (ref <= num) {
        ++result;
        ref *= 10;
    }
    return result;
}

static SkString strip_spaces(const SkString& str) {
    SkString result;
    int count = (int) str.size();
    for (int index = 0; index < count; ++index) {
        char c = str[index];
        if (c != ' ' && c != '-') {
            result += c;
        }
    }
    return result;
}

static SkString strip_final(const SkString& str) {
    SkString result(str);
    if (result.endsWith("\n")) {
        result.remove(result.size() - 1, 1);
    }
    if (result.endsWith(" ")) {
        result.remove(result.size() - 1, 1);
    }
    if (result.endsWith(",")) {
        result.remove(result.size() - 1, 1);
    }
    return result;
}

static void output_font(SkTypeface* face, const char* name, SkTypeface::Style style,
        const char* used, FILE* out) {
    int emSize = face->getUnitsPerEm() * 2;
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setTextAlign(SkPaint::kLeft_Align);
    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
    paint.setTextSize(emSize);
    SkSafeUnref(paint.setTypeface(face));
    SkTDArray<SkPath::Verb> verbs;
    SkTDArray<unsigned> charCodes;
    SkTDArray<SkScalar> widths;
    SkString ptsOut;
    output_path_data(paint, used, emSize, &ptsOut, &verbs, &charCodes, &widths);
    SkString fontnameStr(name);
    SkString strippedStr = strip_spaces(fontnameStr);
    strippedStr.appendf("%s", gStyleName[style]);
    const char* fontname = strippedStr.c_str();
    fprintf(out, "const SkScalar %sPoints[] = {\n", fontname);
    ptsOut = strip_final(ptsOut);
    fprintf(out, "%s", ptsOut.c_str());
    fprintf(out, "\n};\n\n");
    fprintf(out, "const unsigned char %sVerbs[] = {\n", fontname);
    int verbCount = verbs.count();
    int outChCount = 0;
    for (int index = 0; index < verbCount;) {
        SkPath::Verb verb = verbs[index];
        SkASSERT(verb >= SkPath::kMove_Verb && verb <= SkPath::kDone_Verb);
        SkASSERT((unsigned) verb == (unsigned char) verb);
        fprintf(out, "%u", verb);
        if (++index < verbCount) {
            outChCount += 3;
            fprintf(out, "%c", ',');
            if (outChCount >= kMaxLineLength) {
                outChCount = 0;
                fprintf(out, "%c", '\n');
            } else {
                fprintf(out, "%c", ' ');
            }
        }
    }
    fprintf(out, "\n};\n\n");
    
    fprintf(out, "const unsigned %sCharCodes[] = {\n", fontname);
    int offsetCount = charCodes.count();
    for (int index = 0; index < offsetCount;) {
        unsigned offset = charCodes[index];
        fprintf(out, "%u", offset);
        if (++index < offsetCount) {
            outChCount += offset_str_len(offset) + 2;
            fprintf(out, "%c", ',');
            if (outChCount >= kMaxLineLength) {
                outChCount = 0;
                fprintf(out, "%c", '\n');
            } else {
                fprintf(out, "%c", ' ');
            }
        }
    }
    fprintf(out, "\n};\n\n");
    
    SkString widthsStr;
    fprintf(out, "const SkFixed %sWidths[] = {\n", fontname);
    for (int index = 0; index < offsetCount; ++index) {
        output_fixed(widths[index], emSize, &widthsStr);
    }
    widthsStr = strip_final(widthsStr);
    fprintf(out, "%s\n};\n\n", widthsStr.c_str());
    
    fprintf(out, "const int %sCharCodesCount = (int) SK_ARRAY_COUNT(%sCharCodes);\n\n",
            fontname, fontname);

    SkPaint::FontMetrics metrics;
    paint.getFontMetrics(&metrics);
    fprintf(out, "const SkPaint::FontMetrics %sMetrics = {\n", fontname);
    SkString metricsStr;
    metricsStr.printf("0x%08x, ", metrics.fFlags);
    output_scalar(metrics.fTop, emSize, &metricsStr);
    output_scalar(metrics.fAscent, emSize, &metricsStr);
    output_scalar(metrics.fDescent, emSize, &metricsStr);
    output_scalar(metrics.fBottom, emSize, &metricsStr);
    output_scalar(metrics.fLeading, emSize, &metricsStr);
    output_scalar(metrics.fAvgCharWidth, emSize, &metricsStr);
    output_scalar(metrics.fMaxCharWidth, emSize, &metricsStr);
    output_scalar(metrics.fXMin, emSize, &metricsStr);
    output_scalar(metrics.fXMax, emSize, &metricsStr);
    output_scalar(metrics.fXHeight, emSize, &metricsStr);
    output_scalar(metrics.fCapHeight, emSize, &metricsStr);
    output_scalar(metrics.fUnderlineThickness, emSize, &metricsStr);
    output_scalar(metrics.fUnderlinePosition, emSize, &metricsStr);
    metricsStr = strip_final(metricsStr);
    fprintf(out, "%s\n};\n\n", metricsStr.c_str());
}

struct FontWritten {
    const char* fName;
    SkTypeface::Style fStyle;
};

static SkTDArray<FontWritten> gWritten;

static int written_index(const FontDesc& fontDesc) {
    for (int index = 0; index < gWritten.count(); ++index) {
        const FontWritten& writ = gWritten[index];
        if (!strcmp(fontDesc.fFont, writ.fName) && fontDesc.fStyle == writ.fStyle) {
            return index;
        }
    }
    return -1;
}

static void generate_fonts(FILE* out) {
    for (int index = 0; index < gFontsCount; ++index) {
        FontDesc& fontDesc = gFonts[index];
        int fontIndex = written_index(fontDesc);
        if (fontIndex >= 0) {
            fontDesc.fFontIndex = fontIndex;
            continue;
        }
        SkTypeface* systemTypeface = SkTypeface::CreateFromName(fontDesc.fFont, fontDesc.fStyle);
        SkASSERT(systemTypeface);
        SkString filepath(GetResourcePath(fontDesc.fFile));
        SkASSERT(sk_exists(filepath.c_str()));
        SkTypeface* resourceTypeface = SkTypeface::CreateFromFile(filepath.c_str());
        SkASSERT(resourceTypeface);
        output_font(resourceTypeface, fontDesc.fFont, fontDesc.fStyle, fontDesc.fCharsUsed, out);
        fontDesc.fFontIndex = gWritten.count();
        FontWritten* writ = gWritten.append();
        writ->fName = fontDesc.fFont;
        writ->fStyle = fontDesc.fStyle;
    }
}

static void generate_index(const char* defaultName, FILE* out) {
    int fontCount = gWritten.count();
    fprintf(out,
            "static SkTestFontData gTestFonts[] = {\n");
    int fontIndex;
    for (fontIndex = 0; fontIndex < fontCount; ++fontIndex) {
        const FontWritten& writ = gWritten[fontIndex];
        const char* name = writ.fName;
        SkString strippedStr = strip_spaces(SkString(name));
        strippedStr.appendf("%s", gStyleName[writ.fStyle]);
        const char* strip = strippedStr.c_str();
        fprintf(out,
                "    {    %sPoints, %sVerbs, %sCharCodes,\n"
                "         %sCharCodesCount, %sWidths,\n"
                "         %sMetrics, \"%s\", SkTypeface::%s, NULL\n"
                "    },\n",
                strip, strip, strip, strip, strip, strip, name, gStyleName[writ.fStyle]);
    }
    fprintf(out, "};\n\n");
    fprintf(out, "const int gTestFontsCount = (int) SK_ARRAY_COUNT(gTestFonts);\n\n");
    fprintf(out,
                "struct SubFont {\n"
                "    const char* fName;\n"
                "    SkTypeface::Style fStyle;\n"
                "    SkTestFontData& fFont;\n"
                "    const char* fFile;\n"
                "};\n\n"
                "const SubFont gSubFonts[] = {\n");
    int defaultIndex = -1;
    for (int subIndex = 0; subIndex < gFontsCount; subIndex++) {
        const FontDesc& desc = gFonts[subIndex];
        if (!strcmp(defaultName, desc.fName)) {
            defaultIndex = subIndex;
        }
        fprintf(out,
                "    { \"%s\", SkTypeface::%s, gTestFonts[%d], \"%s\"},\n", desc.fName,
                gStyleName[desc.fStyle], desc.fFontIndex, desc.fFile);
    }
    fprintf(out, "};\n\n");
    fprintf(out, "const int gSubFontsCount = (int) SK_ARRAY_COUNT(gSubFonts);\n\n");
    SkASSERT(defaultIndex >= 0);
    fprintf(out, "const int gDefaultFontIndex = %d;\n", defaultIndex);
}

int main(int , char * const []) {
#ifndef SK_BUILD_FOR_MAC
    #error "use fonts installed on Mac"
#endif
    FILE* out = font_header();
    generate_fonts(out);
    generate_index(DEFAULT_FONT_NAME, out);
    fclose(out);
    return 0;
}