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skia2/tools/create_test_font.cpp
caryclark 6d0d6cbb3e PDF expects fonts to map glyph ID 0 to the missing character. 
Add a mapping of glyph ID 0 to the toy font to allow for this.

TBR=bungeman@google.com

Review URL: https://codereview.chromium.org/1175243004
2015-06-11 09:40:44 -07:00

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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/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>
#define DEFAULT_FONT_NAME "sans-serif"
static struct FontDesc {
const char* fName;
SkTypeface::Style fStyle;
const char* fFont;
const char* fFile;
int fFontIndex;
} gFonts[] = {
{"monospace", SkTypeface::kNormal, "Liberation Mono", "LiberationMono-Regular.ttf", -1},
{"monospace", SkTypeface::kBold, "Liberation Mono", "LiberationMono-Bold.ttf", -1},
{"monospace", SkTypeface::kItalic, "Liberation Mono", "LiberationMono-Italic.ttf", -1},
{"monospace", SkTypeface::kBoldItalic, "Liberation Mono", "LiberationMono-BoldItalic.ttf", -1},
{"sans-serif", SkTypeface::kNormal, "Liberation Sans", "LiberationSans-Regular.ttf", -1},
{"sans-serif", SkTypeface::kBold, "Liberation Sans", "LiberationSans-Bold.ttf", -1},
{"sans-serif", SkTypeface::kItalic, "Liberation Sans", "LiberationSans-Italic.ttf", -1},
{"sans-serif", SkTypeface::kBoldItalic, "Liberation Sans", "LiberationSans-BoldItalic.ttf", -1},
{"serif", SkTypeface::kNormal, "Liberation Serif", "LiberationSerif-Regular.ttf", -1},
{"serif", SkTypeface::kBold, "Liberation Serif", "LiberationSerif-Bold.ttf", -1},
{"serif", SkTypeface::kItalic, "Liberation Serif", "LiberationSerif-Italic.ttf", -1},
{"serif", SkTypeface::kBoldItalic, "Liberation Serif", "LiberationSerif-BoldItalic.ttf", -1},
};
const int gFontsCount = (int) SK_ARRAY_COUNT(gFonts);
const char* gStyleName[] = {
"Normal",
"Bold",
"Italic",
"BoldItalic",
};
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 ";
static FILE* font_header(const char* family) {
SkString outPath(SkOSPath::Join(".", "tools"));
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(".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,
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(SkTypeface* face, const char* name, SkTypeface::Style 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);
SkSafeUnref(paint.setTypeface(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", 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");
// 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);
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 = NULL;
for (int index = 0; index < gFontsCount; ++index) {
FontDesc& fontDesc = gFonts[index];
if ((index & 3) == 0) {
out = font_header(fontDesc.fName);
}
int fontIndex = written_index(fontDesc);
if (fontIndex >= 0) {
fontDesc.fFontIndex = fontIndex;
continue;
}
SkTypeface* systemTypeface = SkTypeface::CreateFromName(fontDesc.fFont, fontDesc.fStyle);
SkASSERT(systemTypeface);
SkString filepath("/Library/Fonts/");
filepath.append(fontDesc.fFile);
SkASSERT(sk_exists(filepath.c_str()));
SkTypeface* resourceTypeface = SkTypeface::CreateFromFile(filepath.c_str());
SkASSERT(resourceTypeface);
output_font(resourceTypeface, fontDesc.fFont, fontDesc.fStyle, out);
fontDesc.fFontIndex = gWritten.count();
FontWritten* writ = gWritten.append();
writ->fName = fontDesc.fFont;
writ->fStyle = fontDesc.fStyle;
if ((index & 3) == 3) {
fclose(out);
}
}
}
static void generate_index(const char* defaultName) {
int fontCount = gWritten.count();
FILE* out = font_header("index");
int fontIndex;
#if 0
// currently generated files are inlined one after the other.
// if the inlining is undesirable, generate externs using the code below
// (additional code required to add include files)
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,
"extern const SkScalar %sPoints[];\n"
"extern const unsigned char %sVerbs[];\n"
"extern const unsigned %sCharCodes[];\n"
"extern const int %sCharCodesCount;\n"
"extern const SkFixed %sWidths[];\n"
"extern const SkPaint::FontMetrics %sMetrics;\n",
strip, strip, strip, strip, strip, strip);
}
fprintf(out, "\n");
#endif
fprintf(out, "static SkTestFontData gTestFonts[] = {\n");
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, \"Toy %s\", SkTypeface::k%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 (defaultIndex < 0 && !strcmp(defaultName, desc.fName)) {
defaultIndex = subIndex;
}
fprintf(out,
" { \"%s\", SkTypeface::k%s, gTestFonts[%d], \"%s\" },\n", desc.fName,
gStyleName[desc.fStyle], desc.fFontIndex, desc.fFile);
}
for (int subIndex = 0; subIndex < gFontsCount; subIndex++) {
const FontDesc& desc = gFonts[subIndex];
fprintf(out,
" { \"Toy %s\", SkTypeface::k%s, gTestFonts[%d], \"%s\" },\n", desc.fFont,
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);
fclose(out);
}
int main(int , char * const []) {
#ifndef SK_BUILD_FOR_MAC
#error "use fonts installed on Mac"
#endif
generate_fonts();
generate_index(DEFAULT_FONT_NAME);
return 0;
}
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