Implement onGetTableTags and onGetTableData on Windows.

src/ports/SkFontHost_FreeType.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 185 matching lines @@
     FT_Error setupSize();
     void getBBoxForCurrentGlyph(SkGlyph* glyph, FT_BBox* bbox,
                                 bool snapToPixelBoundary = false);
     // Caller must lock gFTMutex before calling this function.
     void updateGlyphIfLCD(SkGlyph* glyph);
 };
 
 ///////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////
 
-#include "SkStream.h"
-
 struct SkFaceRec {
     SkFaceRec*      fNext;
     FT_Face         fFace;
     FT_StreamRec    fFTStream;
     SkStream*       fSkStream;
     uint32_t        fRefCnt;
     uint32_t        fFontID;
 
     // assumes ownership of the stream, will call unref() when its done
     SkFaceRec(SkStream* strm, uint32_t fontID);
@@ skipping 1179 matching lines @@
     // we cache this value, using -1 as a sentinel for "not computed"
     if (fGlyphCount < 0) {
         AutoFTAccess fta(this);
         FT_Face face = fta.face();
         // if the face failed, we still assign a non-negative value
         fGlyphCount = face ? face->num_glyphs : 0;
     }
     return fGlyphCount;
 }
 
+int SkTypeface_FreeType::onGetTableTags(SkFontTableTag tags[]) const {
+    AutoFTAccess fta(this);
+    FT_Face face = fta.face();
+
+    FT_ULong tableCount = 0;
+    FT_Error error;
+
+    // When 'tag' is NULL, returns number of tables in 'length'.
+    error = FT_Sfnt_Table_Info(face, 0, NULL, &tableCount);
+    if (error) {
+        return 0;
+    }
+
+    if (tags) {
+        for (FT_ULong tableIndex = 0; tableIndex < tableCount; ++tableIndex) {
+            FT_ULong tableTag;
+            FT_ULong tablelength;
+            error = FT_Sfnt_Table_Info(face, tableIndex, &tableTag, &tablelength);
+            if (error) {
+                return 0;
+            }
+            tags[tableIndex] = static_cast<SkFontTableTag>(tableTag);
+        }
+    }
+    return tableCount;
+}
+
+size_t SkTypeface_FreeType::onGetTableData(SkFontTableTag tag, size_t offset,
+                                           size_t length, void* data) const
+{
+    AutoFTAccess fta(this);
+    FT_Face face = fta.face();
+
+    FT_ULong tableLength = 0;
+    FT_Error error;
+
+    // When 'length' is 0 it is overwritten with the full table length; 'offset' is ignored.
+    error = FT_Load_Sfnt_Table(face, tag, 0, NULL, &tableLength);
+    if (error) {
+        return 0;
+    }
+
+    if (offset > tableLength) {
+        return 0;
+    }
+    FT_ULong size = SkTMin(length, tableLength - offset);
+    if (NULL != data) {
+        error = FT_Load_Sfnt_Table(face, tag, offset, reinterpret_cast<FT_Byte*>(data), &size);
+        if (error) {
+            return 0;
+        }
+    }
+
+    return size;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
 /*  Export this so that other parts of our FonttHost port can make use of our
     ability to extract the name+style from a stream, using FreeType's api.
 */
 bool find_name_and_attributes(SkStream* stream, SkString* name,
                               SkTypeface::Style* style, bool* isFixedPitch) {
     FT_Library  library;
     if (FT_Init_FreeType(&library)) {
@@ skipping 42 matching lines @@
         *style = (SkTypeface::Style) tempStyle;
     }
     if (isFixedPitch) {
         *isFixedPitch = FT_IS_FIXED_WIDTH(face);
     }
 
     FT_Done_Face(face);
     FT_Done_FreeType(library);
     return true;
 }