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Unified Diff: src/ports/SkFontHost_FreeType.cpp

Issue 2162023002: Correct advances for 'monospace' fonts in PDF. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: CG and GDI as well. Created 4 years, 5 months ago
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Index: src/ports/SkFontHost_FreeType.cpp
diff --git a/src/ports/SkFontHost_FreeType.cpp b/src/ports/SkFontHost_FreeType.cpp
index 2e0b8b6ee371abc703bd1c5db8bb336cceef9eda..881306ee2801afa0b503e6d939e5e38a73c997ff 100644
--- a/src/ports/SkFontHost_FreeType.cpp
+++ b/src/ports/SkFontHost_FreeType.cpp
@@ -479,21 +479,17 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
info->fLastGlyphID = face->num_glyphs - 1;
info->fEmSize = 1000;
- bool cid = false;
const char* fontType = FT_Get_X11_Font_Format(face);
if (strcmp(fontType, "Type 1") == 0) {
info->fType = SkAdvancedTypefaceMetrics::kType1_Font;
} else if (strcmp(fontType, "CID Type 1") == 0) {
info->fType = SkAdvancedTypefaceMetrics::kType1CID_Font;
- cid = true;
} else if (strcmp(fontType, "CFF") == 0) {
info->fType = SkAdvancedTypefaceMetrics::kCFF_Font;
} else if (strcmp(fontType, "TrueType") == 0) {
info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font;
- cid = true;
TT_Header* ttHeader;
- if ((ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face,
- ft_sfnt_head)) != nullptr) {
+ if ((ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face, ft_sfnt_head)) != nullptr) {
info->fEmSize = ttHeader->Units_Per_EM;
}
} else {
@@ -501,19 +497,19 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
}
info->fStyle = 0;
- if (FT_IS_FIXED_WIDTH(face))
+ if (FT_IS_FIXED_WIDTH(face)) {
info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style;
- if (face->style_flags & FT_STYLE_FLAG_ITALIC)
+ }
+ if (face->style_flags & FT_STYLE_FLAG_ITALIC) {
info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style;
+ }
- PS_FontInfoRec ps_info;
- TT_Postscript* tt_info;
- if (FT_Get_PS_Font_Info(face, &ps_info) == 0) {
- info->fItalicAngle = ps_info.italic_angle;
- } else if ((tt_info =
- (TT_Postscript*)FT_Get_Sfnt_Table(face,
- ft_sfnt_post)) != nullptr) {
- info->fItalicAngle = SkFixedToScalar(tt_info->italicAngle);
+ PS_FontInfoRec psFontInfo;
+ TT_Postscript* postTable;
+ if (FT_Get_PS_Font_Info(face, &psFontInfo) == 0) {
+ info->fItalicAngle = psFontInfo.italic_angle;
+ } else if ((postTable = (TT_Postscript*)FT_Get_Sfnt_Table(face, ft_sfnt_post)) != nullptr) {
+ info->fItalicAngle = SkFixedToScalar(postTable->italicAngle);
} else {
info->fItalicAngle = 0;
}
@@ -537,20 +533,22 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
}
}
- TT_PCLT* pclt_info;
- TT_OS2* os2_table;
- if ((pclt_info = (TT_PCLT*)FT_Get_Sfnt_Table(face, ft_sfnt_pclt)) != nullptr) {
- info->fCapHeight = pclt_info->CapHeight;
- uint8_t serif_style = pclt_info->SerifStyle & 0x3F;
- if (serif_style >= 2 && serif_style <= 6)
+ TT_PCLT* pcltTable;
+ TT_OS2* os2Table;
+ if ((pcltTable = (TT_PCLT*)FT_Get_Sfnt_Table(face, ft_sfnt_pclt)) != nullptr) {
+ info->fCapHeight = pcltTable->CapHeight;
+ uint8_t serif_style = pcltTable->SerifStyle & 0x3F;
+ if (2 <= serif_style && serif_style <= 6) {
info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style;
- else if (serif_style >= 9 && serif_style <= 12)
+ } else if (9 <= serif_style && serif_style <= 12) {
info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style;
- } else if (((os2_table = (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2)) != nullptr) &&
+ }
+ } else if (((os2Table = (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2)) != nullptr) &&
// sCapHeight is available only when version 2 or later.
- os2_table->version != 0xFFFF &&
- os2_table->version >= 2) {
- info->fCapHeight = os2_table->sCapHeight;
+ os2Table->version != 0xFFFF &&
+ os2Table->version >= 2)
+ {
+ info->fCapHeight = os2Table->sCapHeight;
} else {
// Figure out a good guess for CapHeight: average the height of M and X.
FT_BBox m_bbox, x_bbox;
@@ -558,8 +556,7 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
got_m = GetLetterCBox(face, 'M', &m_bbox);
got_x = GetLetterCBox(face, 'X', &x_bbox);
if (got_m && got_x) {
- info->fCapHeight = (m_bbox.yMax - m_bbox.yMin + x_bbox.yMax -
- x_bbox.yMin) / 2;
+ info->fCapHeight = ((m_bbox.yMax - m_bbox.yMin) + (x_bbox.yMax - x_bbox.yMin)) / 2;
} else if (got_m && !got_x) {
info->fCapHeight = m_bbox.yMax - m_bbox.yMin;
} else if (!got_m && got_x) {
@@ -578,62 +575,33 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
}
if (perGlyphInfo & kHAdvance_PerGlyphInfo) {
- if (FT_IS_FIXED_WIDTH(face)) {
- SkAdvancedTypefaceMetrics::WidthRange range(0);
- int16_t advance = face->max_advance_width;
- range.fAdvance.append(1, &advance);
- SkAdvancedTypefaceMetrics::FinishRange(
- &range, 0, SkAdvancedTypefaceMetrics::WidthRange::kDefault);
- info->fGlyphWidths.emplace_back(std::move(range));
- } else if (!cid) {
- SkAdvancedTypefaceMetrics::WidthRange range(0);
- // So as to not blow out the stack, get advances in batches.
- for (int gID = 0; gID < face->num_glyphs; gID += 128) {
- FT_Fixed advances[128];
- int advanceCount = 128;
- if (gID + advanceCount > face->num_glyphs) {
- advanceCount = face->num_glyphs - gID;
- }
- FT_Get_Advances(face, gID, advanceCount, FT_LOAD_NO_SCALE, advances);
- for (int i = 0; i < advanceCount; i++) {
- int16_t advance = advances[i];
- range.fAdvance.append(1, &advance);
+ info->setGlyphWidths(
+ face->num_glyphs,
+ glyphIDs,
+ glyphIDsCount,
+ SkAdvancedTypefaceMetrics::GetAdvance([face](int gId, int16_t* data) {
+ FT_Fixed advance = 0;
+ if (FT_Get_Advances(face, gId, 1, FT_LOAD_NO_SCALE, &advance)) {
+ return false;
}
- }
- SkAdvancedTypefaceMetrics::FinishRange(
- &range, face->num_glyphs - 1,
- SkAdvancedTypefaceMetrics::WidthRange::kRange);
- info->fGlyphWidths.emplace_back(std::move(range));
- } else {
- info->setGlyphWidths(
- face->num_glyphs,
- glyphIDs,
- glyphIDsCount,
- SkAdvancedTypefaceMetrics::GetAdvance([face](int gId, int16_t* data) {
- FT_Fixed advance = 0;
- if (FT_Get_Advances(face, gId, 1, FT_LOAD_NO_SCALE, &advance)) {
- return false;
- }
- SkASSERT(data);
- *data = advance;
- return true;
- })
- );
- }
+ SkASSERT(data);
+ *data = advance;
+ return true;
+ })
+ );
}
- if (perGlyphInfo & kVAdvance_PerGlyphInfo &&
- FT_HAS_VERTICAL(face)) {
+ if (perGlyphInfo & kVAdvance_PerGlyphInfo && FT_HAS_VERTICAL(face)) {
SkASSERT(false); // Not implemented yet.
}
if (perGlyphInfo & kGlyphNames_PerGlyphInfo &&
- info->fType == SkAdvancedTypefaceMetrics::kType1_Font) {
+ info->fType == SkAdvancedTypefaceMetrics::kType1_Font)
hal.canary 2016/07/22 16:20:36 style nit: `{` on previous line
+ {
// Postscript fonts may contain more than 255 glyphs, so we end up
// using multiple font descriptions with a glyph ordering. Record
// the name of each glyph.
- info->fGlyphNames.reset(
- new SkAutoTArray<SkString>(face->num_glyphs));
+ info->fGlyphNames.reset(new SkAutoTArray<SkString>(face->num_glyphs));
for (int gID = 0; gID < face->num_glyphs; gID++) {
char glyphName[128]; // PS limit for names is 127 bytes.
FT_Get_Glyph_Name(face, gID, glyphName, 128);
@@ -642,8 +610,9 @@ SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(
}
if (perGlyphInfo & kToUnicode_PerGlyphInfo &&
- info->fType != SkAdvancedTypefaceMetrics::kType1_Font &&
- face->num_charmaps) {
+ info->fType != SkAdvancedTypefaceMetrics::kType1_Font &&
+ face->num_charmaps)
hal.canary 2016/07/22 16:20:35 same
+ {
populate_glyph_to_unicode(face, &(info->fGlyphToUnicode));
}
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