Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/raster/ftrend1.c

Index: third_party/freetype2/src/src/raster/ftrend1.c
diff --git a/third_party/freetype2/src/src/raster/ftrend1.c b/third_party/freetype2/src/src/raster/ftrend1.c
new file mode 100644
index 0000000000000000000000000000000000000000..f3143928399e8090c082eb0d08985e4a858ab00c
--- /dev/null
+++ b/third_party/freetype2/src/src/raster/ftrend1.c
@@ -0,0 +1,254 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftrend1.c                                                              */
+/*                                                                         */
+/*    The FreeType glyph rasterizer interface (body).                      */
+/*                                                                         */
+/*  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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_OBJECTS_H
+#include FT_OUTLINE_H
+#include "ftrend1.h"
+#include "ftraster.h"
+#include "rastpic.h"
+
+#include "rasterrs.h"
+
+
+  /* initialize renderer -- init its raster */
+  static FT_Error
+  ft_raster1_init( FT_Renderer  render )
+  {
+    FT_Library  library = FT_MODULE_LIBRARY( render );
+
+
+    render->clazz->raster_class->raster_reset( render->raster,
+                                               library->raster_pool,
+                                               library->raster_pool_size );
+
+    return FT_Err_Ok;
+  }
+
+
+  /* set render-specific mode */
+  static FT_Error
+  ft_raster1_set_mode( FT_Renderer  render,
+                       FT_ULong     mode_tag,
+                       FT_Pointer   data )
+  {
+    /* we simply pass it to the raster */
+    return render->clazz->raster_class->raster_set_mode( render->raster,
+                                                         mode_tag,
+                                                         data );
+  }
+
+
+  /* transform a given glyph image */
+  static FT_Error
+  ft_raster1_transform( FT_Renderer       render,
+                        FT_GlyphSlot      slot,
+                        const FT_Matrix*  matrix,
+                        const FT_Vector*  delta )
+  {
+    FT_Error error = FT_Err_Ok;
+
+
+    if ( slot->format != render->glyph_format )
+    {
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    if ( matrix )
+      FT_Outline_Transform( &slot->outline, matrix );
+
+    if ( delta )
+      FT_Outline_Translate( &slot->outline, delta->x, delta->y );
+
+  Exit:
+    return error;
+  }
+
+
+  /* return the glyph's control box */
+  static void
+  ft_raster1_get_cbox( FT_Renderer   render,
+                       FT_GlyphSlot  slot,
+                       FT_BBox*      cbox )
+  {
+    FT_MEM_ZERO( cbox, sizeof ( *cbox ) );
+
+    if ( slot->format == render->glyph_format )
+      FT_Outline_Get_CBox( &slot->outline, cbox );
+  }
+
+
+  /* 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, 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 */
+    if ( mode != FT_RENDER_MODE_MONO )
+    {
+      /* raster1 is only capable of producing monochrome bitmaps */
+      return FT_THROW( Cannot_Render_Glyph );
+    }
+
+    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, &cbox0 );
+
+    /* undocumented but confirmed: bbox values get rounded */
+#if 1
+    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;
+    }
+
+    pitch              = ( ( width + 15 ) >> 4 ) << 1;
+    bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
+
+    bitmap->width = width;
+    bitmap->rows  = height;
+    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;
+
+    /* 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 );
+    slot->bitmap_top  = (FT_Int)( cbox.yMax >> 6 );
+
+  Exit:
+    return error;
+  }
+
+
+  FT_DEFINE_RENDERER( ft_raster1_renderer_class,
+
+      FT_MODULE_RENDERER,
+      sizeof ( FT_RendererRec ),
+
+      "raster1",
+      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 */