Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 163 insertions, 0 deletions

diff --git a/src/3rdparty/freetype/src/base/ftadvanc.c b/src/3rdparty/freetype/src/base/ftadvanc.c
new file mode 100644
index 0000000000..504f9d2309
--- /dev/null
+++ b/src/3rdparty/freetype/src/base/ftadvanc.c
@@ -0,0 +1,163 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftadvanc.c                                                             */
+/*                                                                         */
+/*    Quick computation of advance widths (body).                          */
+/*                                                                         */
+/*  Copyright 2008, 2009 by                                                */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  This file is part of the FreeType project, and may only be used,       */
+/*  modified, and distributed under the terms of the FreeType project      */
+/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
+/*  this file you indicate that you have read the license and              */
+/*  understand and accept it fully.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_ADVANCES_H
+#include FT_INTERNAL_OBJECTS_H
+
+
+  static FT_Error
+  _ft_face_scale_advances( FT_Face    face,
+                           FT_Fixed*  advances,
+                           FT_UInt    count,
+                           FT_Int32   flags )
+  {
+    FT_Fixed  scale;
+    FT_UInt   nn;
+
+
+    if ( flags & FT_LOAD_NO_SCALE )
+      return FT_Err_Ok;
+
+    if ( face->size == NULL )
+      return FT_Err_Invalid_Size_Handle;
+
+    if ( flags & FT_LOAD_VERTICAL_LAYOUT )
+      scale = face->size->metrics.y_scale;
+    else
+      scale = face->size->metrics.x_scale;
+
+    /* this must be the same scaling as to get linear{Hori,Vert}Advance */
+    /* (see `FT_Load_Glyph' implementation in src/base/ftobjs.c)        */
+
+    for ( nn = 0; nn < count; nn++ )
+      advances[nn] = FT_MulDiv( advances[nn], scale, 64 );
+
+    return FT_Err_Ok;
+  }
+
+
+   /* at the moment, we can perform fast advance retrieval only in */
+   /* the following cases:                                         */
+   /*                                                              */
+   /*  - unscaled load                                             */
+   /*  - unhinted load                                             */
+   /*  - light-hinted load                                         */
+
+#define LOAD_ADVANCE_FAST_CHECK( flags )                            \
+          ( flags & ( FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING )    || \
+            FT_LOAD_TARGET_MODE( flags ) == FT_RENDER_MODE_LIGHT )
+
+
+  /* documentation is in ftadvanc.h */
+
+  FT_EXPORT_DEF( FT_Error )
+  FT_Get_Advance( FT_Face    face,
+                  FT_UInt    gindex,
+                  FT_Int32   flags,
+                  FT_Fixed  *padvance )
+  {
+    FT_Face_GetAdvancesFunc  func;
+
+
+    if ( !face )
+      return FT_Err_Invalid_Face_Handle;
+
+    if ( gindex >= (FT_UInt)face->num_glyphs )
+      return FT_Err_Invalid_Glyph_Index;
+
+    func = face->driver->clazz->get_advances;
+    if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
+    {
+      FT_Error  error;
+
+
+      error = func( face, gindex, 1, flags, padvance );
+      if ( !error )
+        return _ft_face_scale_advances( face, padvance, 1, flags );
+
+      if ( error != FT_ERROR_BASE( FT_Err_Unimplemented_Feature ) )
+        return error;
+    }
+
+    return FT_Get_Advances( face, gindex, 1, flags, padvance );
+  }
+
+
+  /* documentation is in ftadvanc.h */
+
+  FT_EXPORT_DEF( FT_Error )
+  FT_Get_Advances( FT_Face    face,
+                   FT_UInt    start,
+                   FT_UInt    count,
+                   FT_Int32   flags,
+                   FT_Fixed  *padvances )
+  {
+    FT_Face_GetAdvancesFunc  func;
+    FT_UInt                  num, end, nn;
+    FT_Error                 error = FT_Err_Ok;
+
+
+    if ( !face )
+      return FT_Err_Invalid_Face_Handle;
+
+    num = (FT_UInt)face->num_glyphs;
+    end = start + count;
+    if ( start >= num || end < start || end > num )
+      return FT_Err_Invalid_Glyph_Index;
+
+    if ( count == 0 )
+      return FT_Err_Ok;
+
+    func = face->driver->clazz->get_advances;
+    if ( func && LOAD_ADVANCE_FAST_CHECK( flags ) )
+    {
+      error = func( face, start, count, flags, padvances );
+      if ( !error )
+        goto Exit;
+
+      if ( error != FT_ERROR_BASE( FT_Err_Unimplemented_Feature ) )
+        return error;
+    }
+
+    error = FT_Err_Ok;
+
+    if ( flags & FT_ADVANCE_FLAG_FAST_ONLY )
+      return FT_Err_Unimplemented_Feature;
+
+    flags |= FT_LOAD_ADVANCE_ONLY;
+    for ( nn = 0; nn < count; nn++ )
+    {
+      error = FT_Load_Glyph( face, start + nn, flags );
+      if ( error )
+        break;
+
+      padvances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT )
+                      ? face->glyph->advance.y
+                      : face->glyph->advance.x;
+    }
+
+    if ( error )
+      return error;
+
+  Exit:
+    return _ft_face_scale_advances( face, padvances, count, flags );
+  }
+
+
+/* END */