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Unified Diff: Source/platform/fonts/harfbuzz/HarfBuzzFaceCoreText.cpp

Issue 618723003: Revert of Switch to HarfBuzz on Mac and remove CoreText shaper (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Created 6 years, 3 months ago
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Index: Source/platform/fonts/harfbuzz/HarfBuzzFaceCoreText.cpp
diff --git a/Source/platform/fonts/harfbuzz/HarfBuzzFaceCoreText.cpp b/Source/platform/fonts/harfbuzz/HarfBuzzFaceCoreText.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..44257c8f4bbc816fbf45f3f09a9adec9786b8115
--- /dev/null
+++ b/Source/platform/fonts/harfbuzz/HarfBuzzFaceCoreText.cpp
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "platform/fonts/harfbuzz/HarfBuzzFace.h"
+
+#include "platform/fonts/FontPlatformData.h"
+#include "platform/fonts/SimpleFontData.h"
+#include "platform/fonts/harfbuzz/HarfBuzzShaper.h"
+
+#include <ApplicationServices/ApplicationServices.h>
+#include "hb.h"
+
+namespace blink {
+
+static hb_position_t floatToHarfBuzzPosition(CGFloat value)
+{
+ return static_cast<hb_position_t>(value * (1 << 16));
+}
+
+static hb_bool_t getGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData)
+{
+ CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
+ UniChar characters[4];
+ CGGlyph cgGlyphs[4];
+ size_t length = 0;
+ U16_APPEND_UNSAFE(characters, length, unicode);
+ if (!CTFontGetGlyphsForCharacters(ctFont, characters, cgGlyphs, length))
+ return false;
+ *glyph = cgGlyphs[0];
+ return true;
+}
+
+static hb_position_t getGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData)
+{
+ CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
+ CGGlyph cgGlyph = glyph;
+ CGFloat advance = CTFontGetAdvancesForGlyphs(ctFont, kCTFontHorizontalOrientation, &cgGlyph, 0, 1);
+ return floatToHarfBuzzPosition(advance);
+}
+
+static hb_bool_t getGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData)
+{
+ return true;
+}
+
+static hb_bool_t getGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_glyph_extents_t* extents, void* userData)
+{
+ CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
+ CGRect cgRect;
+ CGGlyph cgGlyph = glyph;
+ if (CTFontGetBoundingRectsForGlyphs(ctFont, kCTFontDefaultOrientation, &cgGlyph, &cgRect, 1) == CGRectNull)
+ return false;
+ extents->x_bearing = floatToHarfBuzzPosition(cgRect.origin.x);
+ extents->y_bearing = -floatToHarfBuzzPosition(cgRect.origin.y);
+ extents->width = floatToHarfBuzzPosition(cgRect.size.width);
+ extents->height = floatToHarfBuzzPosition(cgRect.size.height);
+ return true;
+}
+
+static hb_font_funcs_t* harfBuzzCoreTextGetFontFuncs()
+{
+ static hb_font_funcs_t* harfBuzzCoreTextFontFuncs = 0;
+
+ if (!harfBuzzCoreTextFontFuncs) {
+ harfBuzzCoreTextFontFuncs = hb_font_funcs_create();
+ hb_font_funcs_set_glyph_func(harfBuzzCoreTextFontFuncs, getGlyph, 0, 0);
+ hb_font_funcs_set_glyph_h_advance_func(harfBuzzCoreTextFontFuncs, getGlyphHorizontalAdvance, 0, 0);
+ hb_font_funcs_set_glyph_h_origin_func(harfBuzzCoreTextFontFuncs, getGlyphHorizontalOrigin, 0, 0);
+ hb_font_funcs_set_glyph_extents_func(harfBuzzCoreTextFontFuncs, getGlyphExtents, 0, 0);
+ hb_font_funcs_make_immutable(harfBuzzCoreTextFontFuncs);
+ }
+ return harfBuzzCoreTextFontFuncs;
+}
+
+static void releaseTableData(void* userData)
+{
+ CFDataRef cfData = reinterpret_cast<CFDataRef>(userData);
+ CFRelease(cfData);
+}
+
+static hb_blob_t* harfBuzzCoreTextGetTable(hb_face_t* face, hb_tag_t tag, void* userData)
+{
+ CGFontRef cgFont = reinterpret_cast<CGFontRef>(userData);
+ if (!cgFont)
+ return 0;
+ CFDataRef cfData = CGFontCopyTableForTag(cgFont, tag);
+ if (!cfData)
+ return 0;
+
+ const char* data = reinterpret_cast<const char*>(CFDataGetBytePtr(cfData));
+ const size_t length = CFDataGetLength(cfData);
+ if (!data || !length)
+ return 0;
+ return hb_blob_create(data, length, HB_MEMORY_MODE_READONLY, reinterpret_cast<void*>(const_cast<__CFData*>(cfData)), releaseTableData);
+}
+
+hb_face_t* HarfBuzzFace::createFace()
+{
+ // It seems that CTFontCopyTable of MacOSX10.5 sdk doesn't work for
+ // OpenType layout tables(GDEF, GSUB, GPOS). Use CGFontCopyTableForTag instead.
+ hb_face_t* face = hb_face_create_for_tables(harfBuzzCoreTextGetTable, m_platformData->cgFont(), 0);
+ ASSERT(face);
+ return face;
+}
+
+hb_font_t* HarfBuzzFace::createFont()
+{
+ hb_font_t* font = hb_font_create(m_face);
+ hb_font_set_funcs(font, harfBuzzCoreTextGetFontFuncs(), m_platformData, 0);
+ const float size = m_platformData->m_textSize;
+ hb_font_set_ppem(font, size, size);
+ const int scale = (1 << 16) * static_cast<int>(size);
+ hb_font_set_scale(font, scale, scale);
+ hb_font_make_immutable(font);
+ return font;
+}
+
+} // namespace blink
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