Add Harfbuzz to third_party and Skia support for such.

Harfbuzz is an open source library which is a unification of the Qt
and Pango shaping engines. We'll be using it on Chromium Linux to
perform complex text shaping.

Additionally, we add support for Harfbuzz into Skia, guarded by
SKIA_HARFBUZZ.

http://codereview.chromium.org/63035/show


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13214 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 94 insertions, 0 deletions

diff --git a/third_party/harfbuzz/src/harfbuzz-buffer.h b/third_party/harfbuzz/src/harfbuzz-buffer.h
new file mode 100644
index 0000000..b134407
--- /dev/null
+++ b/third_party/harfbuzz/src/harfbuzz-buffer.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 1998-2004  David Turner and Werner Lemberg
+ * Copyright (C) 2004,2007  Red Hat, Inc.
+ *
+ * This is part of HarfBuzz, an OpenType Layout engine library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Owen Taylor, Behdad Esfahbod
+ */
+
+#ifndef HARFBUZZ_BUFFER_H
+#define HARFBUZZ_BUFFER_H
+
+#include "harfbuzz-global.h"
+
+HB_BEGIN_HEADER
+
+typedef struct HB_GlyphItemRec_ {
+  HB_UInt     gindex;
+  HB_UInt     properties;
+  HB_UInt     cluster;
+  HB_UShort   component;
+  HB_UShort   ligID;
+  HB_UShort   gproperties;
+} HB_GlyphItemRec, *HB_GlyphItem;
+
+typedef struct HB_PositionRec_ {
+  HB_Fixed   x_pos;
+  HB_Fixed   y_pos;
+  HB_Fixed   x_advance;
+  HB_Fixed   y_advance;
+  HB_UShort  back;            /* number of glyphs to go back
+				 for drawing current glyph   */
+  HB_Bool    new_advance;     /* if set, the advance width values are
+				 absolute, i.e., they won't be
+				 added to the original glyph's value
+				 but rather replace them.            */
+  HB_Short  cursive_chain;   /* character to which this connects,
+				 may be positive or negative; used
+				 only internally                     */
+} HB_PositionRec, *HB_Position;
+
+
+typedef struct HB_BufferRec_{ 
+  HB_UInt    allocated;
+
+  HB_UInt    in_length;
+  HB_UInt    out_length;
+  HB_UInt    in_pos;
+  HB_UInt    out_pos;
+  
+  HB_Bool       separate_out;
+  HB_GlyphItem  in_string;
+  HB_GlyphItem  out_string;
+  HB_GlyphItem  alt_string;
+  HB_Position   positions;
+  HB_UShort      max_ligID;
+} HB_BufferRec, *HB_Buffer;
+
+HB_Error
+hb_buffer_new( HB_Buffer *buffer );
+
+void
+hb_buffer_free( HB_Buffer buffer );
+
+void
+hb_buffer_clear( HB_Buffer buffer );
+
+HB_Error
+hb_buffer_add_glyph( HB_Buffer buffer,
+		      HB_UInt    glyph_index,
+		      HB_UInt    properties,
+		      HB_UInt    cluster );
+
+HB_END_HEADER
+
+#endif /* HARFBUZZ_BUFFER_H */