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skia2/tools/fonts/create_test_font.cpp
Ben Wagner 83c6b96bcd Improve SkTestFontMgr. 
This moves the portable typefaces into the portable font manager.

Change-Id: Id25e8f0b90f99c82d09cfb3ef136bda8c7728ee9
Reviewed-on: https://skia-review.googlesource.com/140351
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
2018-07-13 15:01:04 +00:00

439 lines
16 KiB
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/*
* 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/fonts/test_font_index.inc
// and ./tools/fonts/test_font_<generic name>.inc which are read by
// ./tools/fonts/sk_tool_utils_font.cpp
#include "SkFontStyle.h"
#include "SkOSFile.h"
#include "SkOSPath.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>
#define DEFAULT_FONT_NAME "sans-serif"
namespace {
struct NamedFontStyle {
const char* fName;
SkFontStyle fStyle;
};
constexpr NamedFontStyle normal = {"Normal", SkFontStyle::Normal() };
constexpr NamedFontStyle bold = {"Bold", SkFontStyle::Bold() };
constexpr NamedFontStyle italic = {"Italic", SkFontStyle::Italic() };
constexpr NamedFontStyle bolditalic = {"BoldItalic", SkFontStyle::BoldItalic()};
struct FontDesc {
char const * const fGenericName;
NamedFontStyle const fNamedStyle;
char const * const fFontName;
char const * const fFile;
// fFontIndex is mutable and will be set later.
int fFontIndex;
} gFonts[] = {
{"monospace", normal, "Liberation Mono", "LiberationMono-Regular.ttf", -1},
{"monospace", bold, "Liberation Mono", "LiberationMono-Bold.ttf", -1},
{"monospace", italic, "Liberation Mono", "LiberationMono-Italic.ttf", -1},
{"monospace", bolditalic, "Liberation Mono", "LiberationMono-BoldItalic.ttf", -1},
{"sans-serif", normal, "Liberation Sans", "LiberationSans-Regular.ttf", -1},
{"sans-serif", bold, "Liberation Sans", "LiberationSans-Bold.ttf", -1},
{"sans-serif", italic, "Liberation Sans", "LiberationSans-Italic.ttf", -1},
{"sans-serif", bolditalic, "Liberation Sans", "LiberationSans-BoldItalic.ttf", -1},
{"serif", normal, "Liberation Serif", "LiberationSerif-Regular.ttf", -1},
{"serif", bold, "Liberation Serif", "LiberationSerif-Bold.ttf", -1},
{"serif", italic, "Liberation Serif", "LiberationSerif-Italic.ttf", -1},
{"serif", bolditalic, "Liberation Serif", "LiberationSerif-BoldItalic.ttf", -1},
};
const int gFontsCount = (int) SK_ARRAY_COUNT(gFonts);
const char gHeader[] =
"/*\n"
" * Copyright 2015 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 ";
} // namespace
static FILE* font_header(const char* family) {
SkString outPath(SkOSPath::Join(".", "tools"));
outPath = SkOSPath::Join(outPath.c_str(), "fonts");
outPath = SkOSPath::Join(outPath.c_str(), "test_font_");
SkString fam(family);
do {
int dashIndex = fam.find("-");
if (dashIndex < 0) {
break;
}
fam.writable_str()[dashIndex] = '_';
} while (true);
outPath.append(fam);
outPath.append(".inc");
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,
int emSize, SkString* ptsOut, SkTDArray<SkPath::Verb>* verbs,
SkTDArray<unsigned>* charCodes, SkTDArray<SkScalar>* widths) {
for (int ch = 0x00; ch < 0x7f; ++ch) {
char str[1];
str[0] = ch;
const char* used = str;
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;
if (!ch) {
ch = 0x1f; // skip the rest of the control codes
}
}
}
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(sk_sp<SkTypeface> face, const char* name, NamedFontStyle style, 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);
paint.setTypeface(std::move(face));
SkTDArray<SkPath::Verb> verbs;
SkTDArray<unsigned> charCodes;
SkTDArray<SkScalar> widths;
SkString ptsOut;
output_path_data(paint, emSize, &ptsOut, &verbs, &charCodes, &widths);
SkString fontnameStr(name);
SkString strippedStr = strip_spaces(fontnameStr);
strippedStr.appendf("%s", style.fName);
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");
// all fonts are now 0x00, 0x20 - 0xFE
// don't need to generate or output character codes?
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);
output_scalar(metrics.fStrikeoutThickness, emSize, &metricsStr);
output_scalar(metrics.fStrikeoutPosition, emSize, &metricsStr);
metricsStr = strip_final(metricsStr);
fprintf(out, "%s\n};\n\n", metricsStr.c_str());
}
struct FontWritten {
const char* fFontName;
NamedFontStyle fNamedStyle;
};
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.fFontName, writ.fFontName) &&
fontDesc.fNamedStyle.fStyle == writ.fNamedStyle.fStyle)
{
return index;
}
}
return -1;
}
static void generate_fonts(const char* basepath) {
FILE* out = nullptr;
for (int index = 0; index < gFontsCount; ++index) {
FontDesc& fontDesc = gFonts[index];
if ((index & 3) == 0) {
out = font_header(fontDesc.fGenericName);
}
int fontIndex = written_index(fontDesc);
if (fontIndex >= 0) {
fontDesc.fFontIndex = fontIndex;
continue;
}
SkString filepath(SkOSPath::Join(basepath, fontDesc.fFile));
SkASSERTF(sk_exists(filepath.c_str()), "The file %s does not exist.", filepath.c_str());
sk_sp<SkTypeface> resourceTypeface = SkTypeface::MakeFromFile(filepath.c_str());
SkASSERTF(resourceTypeface, "The file %s is not a font.", filepath.c_str());
output_font(std::move(resourceTypeface), fontDesc.fFontName, fontDesc.fNamedStyle, out);
fontDesc.fFontIndex = gWritten.count();
FontWritten* writ = gWritten.append();
writ->fFontName = fontDesc.fFontName;
writ->fNamedStyle = fontDesc.fNamedStyle;
if ((index & 3) == 3) {
fclose(out);
}
}
}
static const char* slant_to_string(SkFontStyle::Slant slant) {
switch (slant) {
case SkFontStyle::kUpright_Slant: return "SkFontStyle::kUpright_Slant";
case SkFontStyle::kItalic_Slant : return "SkFontStyle::kItalic_Slant" ;
case SkFontStyle::kOblique_Slant: return "SkFontStyle::kOblique_Slant";
default: SK_ABORT("Unknown slant"); return "";
}
}
static void generate_index(const char* defaultName) {
FILE* out = font_header("index");
fprintf(out, "static SkTestFontData gTestFonts[] = {\n");
for (const FontWritten& writ : gWritten) {
const char* name = writ.fFontName;
SkString strippedStr = strip_spaces(SkString(name));
strippedStr.appendf("%s", writ.fNamedStyle.fName);
const char* strip = strippedStr.c_str();
fprintf(out,
" { %sPoints, %sVerbs, %sCharCodes,\n"
" %sCharCodesCount, %sWidths,\n"
" %sMetrics, \"Toy %s\", SkFontStyle(%d,%d,%s)\n"
" },\n",
strip, strip, strip, strip, strip, strip, name,
writ.fNamedStyle.fStyle.weight(), writ.fNamedStyle.fStyle.width(),
slant_to_string(writ.fNamedStyle.fStyle.slant()));
}
fprintf(out, "};\n\n");
fprintf(out, "const int gTestFontsCount = (int) SK_ARRAY_COUNT(gTestFonts);\n\n");
fprintf(out,
"struct SubFont {\n"
" const char* fFamilyName;\n"
" const char* fStyleName;\n"
" SkFontStyle 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 (defaultIndex < 0 && !strcmp(defaultName, desc.fGenericName)) {
defaultIndex = subIndex;
}
fprintf(out,
" { \"%s\", \"%s\", SkFontStyle(%d,%d,%s), gTestFonts[%d], \"%s\" },\n",
desc.fGenericName, desc.fNamedStyle.fName,
desc.fNamedStyle.fStyle.weight(), desc.fNamedStyle.fStyle.width(),
slant_to_string(desc.fNamedStyle.fStyle.slant()), desc.fFontIndex, desc.fFile);
}
for (int subIndex = 0; subIndex < gFontsCount; subIndex++) {
const FontDesc& desc = gFonts[subIndex];
fprintf(out,
" { \"Toy %s\", \"%s\", SkFontStyle(%d,%d,%s), gTestFonts[%d], \"%s\" },\n",
desc.fFontName, desc.fNamedStyle.fName,
desc.fNamedStyle.fStyle.weight(), desc.fNamedStyle.fStyle.width(),
slant_to_string(desc.fNamedStyle.fStyle.slant()), 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);
fclose(out);
}
int main(int , char * const []) {
generate_fonts("/Library/Fonts/"); // or /usr/share/fonts/truetype/ttf-liberation/
generate_index(DEFAULT_FONT_NAME);
return 0;
}
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