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
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkAdvancedTypefaceMetrics.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkFontDescriptor.h"
#include "SkGlyph.h"
#include "SkImageInfo.h"
#include "SkMatrix.h"
#include "SkOTUtils.h"
#include "SkPaintPriv.h"
#include "SkPath.h"
#include "SkPoint.h"
#include "SkRect.h"
#include "SkScalerContext.h"
#include "SkString.h"
#include "SkTDArray.h"
#include "SkTestTypeface.h"
#include "SkTo.h"
#include "SkUtils.h"
#include <utility>
class SkDescriptor;
SkTestFont::SkTestFont(const SkTestFontData& fontData)
: INHERITED()
, fCharCodes(fontData.fCharCodes)
, fCharCodesCount(fontData.fCharCodes ? fontData.fCharCodesCount : 0)
, fWidths(fontData.fWidths)
, fMetrics(fontData.fMetrics)
, fName(fontData.fName)
, fPaths(nullptr)
{
init(fontData.fPoints, fontData.fVerbs);
}
SkTestFont::~SkTestFont() {
for (unsigned index = 0; index < fCharCodesCount; ++index) {
delete fPaths[index];
}
delete[] fPaths;
}
int SkTestFont::codeToIndex(SkUnichar charCode) const {
for (unsigned index = 0; index < fCharCodesCount; ++index) {
if (fCharCodes[index] == (unsigned) charCode) {
return (int) index;
}
}
return 0;
}
void SkTestFont::init(const SkScalar* pts, const unsigned char* verbs) {
fPaths = new SkPath* [fCharCodesCount];
for (unsigned index = 0; index < fCharCodesCount; ++index) {
SkPath* path = new SkPath;
SkPath::Verb verb;
while ((verb = (SkPath::Verb) *verbs++) != SkPath::kDone_Verb) {
switch (verb) {
case SkPath::kMove_Verb:
path->moveTo(pts[0], pts[1]);
pts += 2;
break;
case SkPath::kLine_Verb:
path->lineTo(pts[0], pts[1]);
pts += 2;
break;
case SkPath::kQuad_Verb:
path->quadTo(pts[0], pts[1], pts[2], pts[3]);
pts += 4;
break;
case SkPath::kCubic_Verb:
path->cubicTo(pts[0], pts[1], pts[2], pts[3], pts[4], pts[5]);
pts += 6;
break;
case SkPath::kClose_Verb:
path->close();
break;
default:
SkDEBUGFAIL("bad verb");
return;
}
}
// This should make SkPath::getBounds() queries threadsafe.
path->updateBoundsCache();
fPaths[index] = path;
}
}
SkTestTypeface::SkTestTypeface(sk_sp<SkTestFont> testFont, const SkFontStyle& style)
: SkTypeface(style, false)
, fTestFont(std::move(testFont)) {
}
void SkTestTypeface::getAdvance(SkGlyph* glyph) {
SkGlyphID glyphID = glyph->getGlyphID();
glyphID = glyphID < fTestFont->fCharCodesCount ? glyphID : 0;
// TODO(benjaminwagner): Update users to use floats.
glyph->fAdvanceX = SkFixedToFloat(fTestFont->fWidths[glyphID]);
glyph->fAdvanceY = 0;
}
void SkTestTypeface::getFontMetrics(SkPaint::FontMetrics* metrics) {
*metrics = fTestFont->fMetrics;
}
void SkTestTypeface::getPath(SkGlyphID glyphID, SkPath* path) {
glyphID = glyphID < fTestFont->fCharCodesCount ? glyphID : 0;
*path = *fTestFont->fPaths[glyphID];
}
void SkTestTypeface::onFilterRec(SkScalerContextRec* rec) const {
rec->setHinting(SkPaint::kNo_Hinting);
}
void SkTestTypeface::getGlyphToUnicodeMap(SkUnichar* glyphToUnicode) const {
unsigned glyphCount = fTestFont->fCharCodesCount;
for (unsigned gid = 0; gid < glyphCount; ++gid) {
glyphToUnicode[gid] = SkTo<SkUnichar>(fTestFont->fCharCodes[gid]);
}
}
std::unique_ptr<SkAdvancedTypefaceMetrics> SkTestTypeface::onGetAdvancedMetrics() const { // pdf only
std::unique_ptr<SkAdvancedTypefaceMetrics> info(new SkAdvancedTypefaceMetrics);
info->fFontName.set(fTestFont->fName);
return info;
}
void SkTestTypeface::onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const {
desc->setFamilyName(fTestFont->fName);
desc->setStyle(this->fontStyle());
*isLocal = false;
}
int SkTestTypeface::onCharsToGlyphs(const void* chars, Encoding encoding,
uint16_t glyphs[], int glyphCount) const {
auto utf8 = (const char*)chars;
auto utf16 = (const uint16_t*)chars;
auto utf32 = (const SkUnichar*)chars;
for (int i = 0; i < glyphCount; i++) {
SkUnichar ch;
switch (encoding) {
case kUTF8_Encoding: ch = SkUTF8_NextUnichar(&utf8 ); break;
case kUTF16_Encoding: ch = SkUTF16_NextUnichar(&utf16); break;
case kUTF32_Encoding: ch = *utf32++; break;
}
if (glyphs) {
glyphs[i] = fTestFont->codeToIndex(ch);
}
}
return glyphCount;
}
void SkTestTypeface::onGetFamilyName(SkString* familyName) const {
*familyName = fTestFont->fName;
}
SkTypeface::LocalizedStrings* SkTestTypeface::onCreateFamilyNameIterator() const {
SkString familyName(fTestFont->fName);
SkString language("und"); //undetermined
return new SkOTUtils::LocalizedStrings_SingleName(familyName, language);
}
class SkTestScalerContext : public SkScalerContext {
public:
SkTestScalerContext(sk_sp<SkTestTypeface> face, const SkScalerContextEffects& effects,
const SkDescriptor* desc)
: SkScalerContext(std::move(face), effects, desc)
{
fRec.getSingleMatrix(&fMatrix);
this->forceGenerateImageFromPath();
}
protected:
SkTestTypeface* getTestTypeface() const {
return static_cast<SkTestTypeface*>(this->getTypeface());
}
unsigned generateGlyphCount() override {
return this->getTestTypeface()->onCountGlyphs();
}
uint16_t generateCharToGlyph(SkUnichar uni) override {
uint16_t glyph;
(void) this->getTestTypeface()->onCharsToGlyphs((const void *) &uni,
SkTypeface::kUTF32_Encoding, &glyph, 1);
return glyph;
}
void generateAdvance(SkGlyph* glyph) override {
this->getTestTypeface()->getAdvance(glyph);
const SkVector advance = fMatrix.mapXY(SkFloatToScalar(glyph->fAdvanceX),
SkFloatToScalar(glyph->fAdvanceY));
glyph->fAdvanceX = SkScalarToFloat(advance.fX);
glyph->fAdvanceY = SkScalarToFloat(advance.fY);
}
void generateMetrics(SkGlyph* glyph) override {
glyph->zeroMetrics();
this->generateAdvance(glyph);
// Always generates from paths, so SkScalerContext::getMetrics will figure the bounds.
}
void generateImage(const SkGlyph&) override {
SK_ABORT("Should have generated from path.");
}
bool generatePath(SkGlyphID glyph, SkPath* path) override {
this->getTestTypeface()->getPath(glyph, path);
path->transform(fMatrix);
return true;
}
void generateFontMetrics(SkPaint::FontMetrics* metrics) override {
this->getTestTypeface()->getFontMetrics(metrics);
SkPaintPriv::ScaleFontMetrics(metrics, fMatrix.getScaleY());
}
private:
SkMatrix fMatrix;
};
SkScalerContext* SkTestTypeface::onCreateScalerContext(
const SkScalerContextEffects& effects, const SkDescriptor* desc) const
{
return new SkTestScalerContext(sk_ref_sp(const_cast<SkTestTypeface*>(this)), effects, desc);
}
|
