Update bundled freetype to 2.6.1

third_party/freetype/src/raster/ftrend1.c

 /***************************************************************************/
 /*                                                                         */
 /*  ftrend1.c                                                              */
 /*                                                                         */
 /*    The FreeType glyph rasterizer interface (body).                      */
 /*                                                                         */
-/*  Copyright 1996-2003, 2005, 2006, 2011, 2013 by                         */
+/*  Copyright 1996-2015 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.                                        */
 /*                                                                         */
 /***************************************************************************/
 
@@ skipping 79 matching lines @@
 
   /* convert a slot's glyph image into a bitmap */
   static FT_Error
   ft_raster1_render( FT_Renderer       render,
                      FT_GlyphSlot      slot,
                      FT_Render_Mode    mode,
                      const FT_Vector*  origin )
   {
     FT_Error     error;
     FT_Outline*  outline;
-    FT_BBox      cbox;
+    FT_BBox      cbox, cbox0;
     FT_UInt      width, height, pitch;
     FT_Bitmap*   bitmap;
     FT_Memory    memory;
 
     FT_Raster_Params  params;
 
 
     /* check glyph image format */
     if ( slot->format != render->glyph_format )
     {
       error = FT_THROW( Invalid_Argument );
       goto Exit;
     }
 
     /* check rendering mode */
-#ifndef FT_CONFIG_OPTION_PIC
     if ( mode != FT_RENDER_MODE_MONO )
     {
       /* raster1 is only capable of producing monochrome bitmaps */
-      if ( render->clazz == &ft_raster1_renderer_class )
-        return FT_THROW( Cannot_Render_Glyph );
+      return FT_THROW( Cannot_Render_Glyph );
     }
-    else
-    {
-      /* raster5 is only capable of producing 5-gray-levels bitmaps */
-      if ( render->clazz == &ft_raster5_renderer_class )
-        return FT_THROW( Cannot_Render_Glyph );
-    }
-#else /* FT_CONFIG_OPTION_PIC */
-    /* When PIC is enabled, we cannot get to the class object      */
-    /* so instead we check the final character in the class name   */
-    /* ("raster5" or "raster1"). Yes this is a hack.               */
-    /* The "correct" thing to do is have different render function */
-    /* for each of the classes.                                    */
-    if ( mode != FT_RENDER_MODE_MONO )
-    {
-      /* raster1 is only capable of producing monochrome bitmaps */
-      if ( render->clazz->root.module_name[6] == '1' )
-        return FT_THROW( Cannot_Render_Glyph );
-    }
-    else
-    {
-      /* raster5 is only capable of producing 5-gray-levels bitmaps */
-      if ( render->clazz->root.module_name[6] == '5' )
-        return FT_THROW( Cannot_Render_Glyph );
-    }
-#endif /* FT_CONFIG_OPTION_PIC */
 
     outline = &slot->outline;
 
     /* translate the outline to the new origin if needed */
     if ( origin )
       FT_Outline_Translate( outline, origin->x, origin->y );
 
     /* compute the control box, and grid fit it */
-    FT_Outline_Get_CBox( outline, &cbox );
+    FT_Outline_Get_CBox( outline, &cbox0 );
 
     /* undocumented but confirmed: bbox values get rounded */
 #if 1
-    cbox.xMin = FT_PIX_ROUND( cbox.xMin );
-    cbox.yMin = FT_PIX_ROUND( cbox.yMin );
-    cbox.xMax = FT_PIX_ROUND( cbox.xMax );
-    cbox.yMax = FT_PIX_ROUND( cbox.yMax );
+    cbox.xMin = FT_PIX_ROUND( cbox0.xMin );
+    cbox.yMin = FT_PIX_ROUND( cbox0.yMin );
+    cbox.xMax = FT_PIX_ROUND( cbox0.xMax );
+    cbox.yMax = FT_PIX_ROUND( cbox0.yMax );
 #else
     cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
     cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
     cbox.xMax = FT_PIX_CEIL( cbox.xMax );
     cbox.yMax = FT_PIX_CEIL( cbox.yMax );
 #endif
 
+    /* If either `width' or `height' round to 0, try    */
+    /* explicitly rounding up/down.  In the case of     */
+    /* glyphs containing only one very narrow feature,  */
+    /* this gives the drop-out compensation in the scan */
+    /* conversion code a chance to do its stuff.        */
     width  = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
+    if ( width == 0 )
+    {
+      cbox.xMin = FT_PIX_FLOOR( cbox0.xMin );
+      cbox.xMax = FT_PIX_CEIL( cbox0.xMax );
+
+      width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
+    }
+
     height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
+    if ( height == 0 )
+    {
+      cbox.yMin = FT_PIX_FLOOR( cbox0.yMin );
+      cbox.yMax = FT_PIX_CEIL( cbox0.yMax );
+
+      height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
+    }
 
     if ( width > FT_USHORT_MAX || height > FT_USHORT_MAX )
     {
       error = FT_THROW( Invalid_Argument );
       goto Exit;
     }
 
     bitmap = &slot->bitmap;
     memory = render->root.memory;
 
     /* release old bitmap buffer */
     if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
     {
       FT_FREE( bitmap->buffer );
       slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
     }
 
-    /* allocate new one, depends on pixel format */
-    if ( !( mode & FT_RENDER_MODE_MONO ) )
-    {
-      /* we pad to 32 bits, only for backwards compatibility with FT 1.x */
-      pitch              = FT_PAD_CEIL( width, 4 );
-      bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
-      bitmap->num_grays  = 256;
-    }
-    else
-    {
-      pitch              = ( ( width + 15 ) >> 4 ) << 1;
-      bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
-    }
+    pitch              = ( ( width + 15 ) >> 4 ) << 1;
+    bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
 
     bitmap->width = width;
     bitmap->rows  = height;
-    bitmap->pitch = pitch;
+    bitmap->pitch = (int)pitch;
 
     if ( FT_ALLOC_MULT( bitmap->buffer, pitch, height ) )
       goto Exit;
 
     slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
 
     /* translate outline to render it into the bitmap */
     FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
 
     /* set up parameters */
     params.target = bitmap;
     params.source = outline;
     params.flags  = 0;
 
-    if ( bitmap->pixel_mode == FT_PIXEL_MODE_GRAY )
-      params.flags |= FT_RASTER_FLAG_AA;
-
     /* render outline into the bitmap */
     error = render->raster_render( render->raster, &params );
 
     FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );
 
     if ( error )
       goto Exit;
 
     slot->format      = FT_GLYPH_FORMAT_BITMAP;
     slot->bitmap_left = (FT_Int)( cbox.xMin >> 6 );
@@ skipping 24 matching lines @@
 
     (FT_Renderer_RenderFunc)   ft_raster1_render,
     (FT_Renderer_TransformFunc)ft_raster1_transform,
     (FT_Renderer_GetCBoxFunc)  ft_raster1_get_cbox,
     (FT_Renderer_SetModeFunc)  ft_raster1_set_mode,
 
     (FT_Raster_Funcs*)    &FT_STANDARD_RASTER_GET
   )
 
 
-  /* This renderer is _NOT_ part of the default modules; you will need */
-  /* to register it by hand in your application.  It should only be    */
-  /* used for backwards-compatibility with FT 1.x anyway.              */
-  /*                                                                   */
-  FT_DEFINE_RENDERER( ft_raster5_renderer_class,
-
-      FT_MODULE_RENDERER,
-      sizeof ( FT_RendererRec ),
-
-      "raster5",
-      0x10000L,
-      0x20000L,
-
-      0,    /* module specific interface */
-
-      (FT_Module_Constructor)ft_raster1_init,
-      (FT_Module_Destructor) 0,
-      (FT_Module_Requester)  0
-    ,
-
-    FT_GLYPH_FORMAT_OUTLINE,
-
-    (FT_Renderer_RenderFunc)   ft_raster1_render,
-    (FT_Renderer_TransformFunc)ft_raster1_transform,
-    (FT_Renderer_GetCBoxFunc)  ft_raster1_get_cbox,
-    (FT_Renderer_SetModeFunc)  ft_raster1_set_mode,
-
-    (FT_Raster_Funcs*)    &FT_STANDARD_RASTER_GET
-  )
-
-
 /* END */