void TTFFont::assureCached(uint32 chr) const {
if (!chr || !_allowLateCaching || _glyphs.contains(chr)) {
return;
}
Glyph newGlyph;
if (cacheGlyph(newGlyph, chr)) {
_glyphs[chr] = newGlyph;
}
}
CachedGlyphInfo* Font::getCachedGlyph(const SkPaint* paint, glyph_t textUnit, bool precaching) {
CachedGlyphInfo* cachedGlyph = mCachedGlyphs.valueFor(textUnit);
if (cachedGlyph) {
// Is the glyph still in texture cache?
if (!cachedGlyph->mIsValid) {
SkAutoGlyphCache autoCache(*paint, &mDeviceProperties, &mDescription.mLookupTransform);
const SkGlyph& skiaGlyph = GET_METRICS(autoCache.getCache(), textUnit);
updateGlyphCache(paint, skiaGlyph, autoCache.getCache(), cachedGlyph, precaching);
}
} else {
cachedGlyph = cacheGlyph(paint, textUnit, precaching);
}
return cachedGlyph;
}
CachedGlyphInfo* Font::getCachedGlyph(SkPaint* paint, glyph_t textUnit, bool precaching) {
CachedGlyphInfo* cachedGlyph = NULL;
ssize_t index = mCachedGlyphs.indexOfKey(textUnit);
if (index >= 0) {
cachedGlyph = mCachedGlyphs.valueAt(index);
} else {
cachedGlyph = cacheGlyph(paint, textUnit, precaching);
}
// Is the glyph still in texture cache?
if (!cachedGlyph->mIsValid) {
const SkGlyph& skiaGlyph = GET_METRICS(paint, textUnit);
updateGlyphCache(paint, skiaGlyph, cachedGlyph, precaching);
}
return cachedGlyph;
}
bool TTFFont::load(Common::SeekableReadStream &stream, int size, bool monochrome, const uint32 *mapping) {
if (!g_ttf.isInitialized())
return false;
_size = stream.size();
if (!_size)
return false;
_ttfFile = new uint8[_size];
assert(_ttfFile);
if (stream.read(_ttfFile, _size) != _size) {
delete[] _ttfFile;
_ttfFile = 0;
return false;
}
if (!g_ttf.loadFont(_ttfFile, _size, _face)) {
delete[] _ttfFile;
_ttfFile = 0;
return false;
}
// We only support scalable fonts.
if (!FT_IS_SCALABLE(_face)) {
delete[] _ttfFile;
_ttfFile = 0;
g_ttf.closeFont(_face);
return false;
}
// Check whether we have kerning support
_hasKerning = (FT_HAS_KERNING(_face) != 0);
if (FT_Set_Char_Size(_face, 0, size * 64, 0, 0)) {
delete[] _ttfFile;
_ttfFile = 0;
return false;
}
_monochrome = monochrome;
FT_Fixed yScale = _face->size->metrics.y_scale;
_ascent = ftCeil26_6(FT_MulFix(_face->ascender, yScale));
_descent = ftCeil26_6(FT_MulFix(_face->descender, yScale));
_width = ftCeil26_6(FT_MulFix(_face->max_advance_width, _face->size->metrics.x_scale));
_height = _ascent - _descent + 1;
if (!mapping) {
// Load all ISO-8859-1 characters.
for (uint i = 0; i < 256; ++i) {
if (!cacheGlyph(_glyphs[i], _glyphSlots[i], i))
_glyphSlots[i] = 0;
}
} else {
for (uint i = 0; i < 256; ++i) {
const uint32 unicode = mapping[i] & 0x7FFFFFFF;
const bool isRequired = (mapping[i] & 0x80000000) != 0;
// Check whether loading an important glyph fails and error out if
// that is the case.
if (!cacheGlyph(_glyphs[i], _glyphSlots[i], unicode)) {
_glyphSlots[i] = 0;
if (isRequired)
return false;
}
}
}
_initialized = (_glyphs.size() != 0);
return _initialized;
}
bool TTFFont::load(Common::SeekableReadStream &stream, int size, uint dpi, TTFRenderMode renderMode, const uint32 *mapping) {
if (!g_ttf.isInitialized())
return false;
_size = stream.size();
if (!_size)
return false;
_ttfFile = new uint8[_size];
assert(_ttfFile);
if (stream.read(_ttfFile, _size) != _size) {
delete[] _ttfFile;
_ttfFile = 0;
return false;
}
if (!g_ttf.loadFont(_ttfFile, _size, _face)) {
delete[] _ttfFile;
_ttfFile = 0;
return false;
}
// We only support scalable fonts.
if (!FT_IS_SCALABLE(_face)) {
delete[] _ttfFile;
_ttfFile = 0;
g_ttf.closeFont(_face);
return false;
}
// Check whether we have kerning support
_hasKerning = (FT_HAS_KERNING(_face) != 0);
if (FT_Set_Char_Size(_face, 0, size * 64, dpi, dpi)) {
delete[] _ttfFile;
_ttfFile = 0;
return false;
}
switch (renderMode) {
case kTTFRenderModeNormal:
_loadFlags = FT_LOAD_TARGET_NORMAL;
_renderMode = FT_RENDER_MODE_NORMAL;
break;
case kTTFRenderModeLight:
_loadFlags = FT_LOAD_TARGET_LIGHT;
_renderMode = FT_RENDER_MODE_LIGHT;
break;
case kTTFRenderModeMonochrome:
_loadFlags = FT_LOAD_TARGET_MONO;
_renderMode = FT_RENDER_MODE_MONO;
break;
}
FT_Fixed yScale = _face->size->metrics.y_scale;
_ascent = ftCeil26_6(FT_MulFix(_face->ascender, yScale));
_descent = ftCeil26_6(FT_MulFix(_face->descender, yScale));
_width = ftCeil26_6(FT_MulFix(_face->max_advance_width, _face->size->metrics.x_scale));
_height = _ascent - _descent + 1;
if (!mapping) {
// Allow loading of all unicode characters.
_allowLateCaching = true;
// Load all ISO-8859-1 characters.
for (uint i = 0; i < 256; ++i) {
if (!cacheGlyph(_glyphs[i], i)) {
_glyphs.erase(i);
}
}
} else {
// We have a fixed map of characters do not load more later.
_allowLateCaching = false;
for (uint i = 0; i < 256; ++i) {
const uint32 unicode = mapping[i] & 0x7FFFFFFF;
const bool isRequired = (mapping[i] & 0x80000000) != 0;
// Check whether loading an important glyph fails and error out if
// that is the case.
if (!cacheGlyph(_glyphs[i], unicode)) {
_glyphs.erase(i);
if (isRequired)
return false;
}
}
}
_initialized = (_glyphs.size() != 0);
return _initialized;
}
