re-land 187283 -- switch to skia's version of SkFontHost_fontconfig

skia/ext/SkFontHost_fontconfig_impl.h

Index: skia/ext/SkFontHost_fontconfig_impl.h
===================================================================
--- skia/ext/SkFontHost_fontconfig_impl.h	(revision 187566)
+++ skia/ext/SkFontHost_fontconfig_impl.h	(working copy)
@@ -1,73 +0,0 @@
-/* libs/graphics/ports/SkFontHost_fontconfig_impl.h
-**
-** Copyright 2009, Google Inc.
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-**     http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-/* The SkFontHost_fontconfig code requires an implementation of an abstact
- * fontconfig interface. We do this because sometimes fontconfig is not
- * directly availible and this provides an ability to change the fontconfig
- * implementation at run-time.
- */
-
-#ifndef FontConfigInterface_DEFINED
-#define FontConfigInterface_DEFINED
-
-#include <string>
-
-class FontConfigInterface {
-  public:
-    virtual ~FontConfigInterface() { }
-
-    /** Performs config match
-     *
-     *  @param result_family (optional, set to NULL to ignore, output)
-     *      on success, set to the resulting family name.
-     *  @param result_filefaceid (optional, set to NULL to ignore, output)
-     *      on success, set to the resulting fileface id.
-     *  @param filefaceid_valid if true, then |filefaceid| is valid
-     *  @param filefaceid the filefaceid (as returned by this function)
-     *         which we are trying to match.
-     *  @param family (optional) the family of the font that we are trying to
-     *    match. If the length of the |family| is greater then
-     *    kMaxFontFamilyLength, this function should immediately return false.
-     *  @param characters (optional) UTF-16 characters the font must cover.
-     *  @param characters_bytes (optional) number of bytes in |characters|
-     *  @param is_bold (optional, set to NULL to ignore, in/out)
-     *  @param is_italic (optional, set to NULL to ignore, in/out)
-     *  @return true iff successful.
-     *  Note that |filefaceid| uniquely identifies <font file, face_index) :
-     *  system font: filefaceid =
-     *                   (fileid(unique per font file) << 4 | face_index)
-     *  remote font: filefaceid = fileid
-     */
-    virtual bool Match(
-          std::string* result_family,
-          unsigned* result_filefaceid,
-          bool filefaceid_valid,
-          unsigned filefaceid,
-          const std::string& family,
-          const void* characters,
-          size_t characters_bytes,
-          bool* is_bold,
-          bool* is_italic) = 0;
-
-    /** Open a font file given the filefaceid as returned by Match.
-     */
-    virtual int Open(unsigned filefaceid) = 0;
-
-    static const unsigned kMaxFontFamilyLength = 2048;
-};
-
-#endif  // FontConfigInterface_DEFINED