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

1 files changed, 467 insertions, 0 deletions

diff --git a/src/3rdparty/freetype/src/smooth/ftsmooth.c b/src/3rdparty/freetype/src/smooth/ftsmooth.c
new file mode 100644
index 0000000000..a6db5048d3
--- /dev/null
+++ b/src/3rdparty/freetype/src/smooth/ftsmooth.c
@@ -0,0 +1,467 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftsmooth.c                                                             */
+/*                                                                         */
+/*    Anti-aliasing renderer interface (body).                             */
+/*                                                                         */
+/*  Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 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_INTERNAL_OBJECTS_H
+#include FT_OUTLINE_H
+#include "ftsmooth.h"
+#include "ftgrays.h"
+
+#include "ftsmerrs.h"
+
+
+  /* initialize renderer -- init its raster */
+  static FT_Error
+  ft_smooth_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 0;
+  }
+
+
+  /* sets render-specific mode */
+  static FT_Error
+  ft_smooth_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_smooth_transform( FT_Renderer       render,
+                       FT_GlyphSlot      slot,
+                       const FT_Matrix*  matrix,
+                       const FT_Vector*  delta )
+  {
+    FT_Error  error = Smooth_Err_Ok;
+
+
+    if ( slot->format != render->glyph_format )
+    {
+      error = Smooth_Err_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_smooth_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_smooth_render_generic( FT_Renderer       render,
+                            FT_GlyphSlot      slot,
+                            FT_Render_Mode    mode,
+                            const FT_Vector*  origin,
+                            FT_Render_Mode    required_mode )
+  {
+    FT_Error     error;
+    FT_Outline*  outline = NULL;
+    FT_BBox      cbox;
+    FT_UInt      width, height, height_org, width_org, pitch;
+    FT_Bitmap*   bitmap;
+    FT_Memory    memory;
+    FT_Int       hmul = mode == FT_RENDER_MODE_LCD;
+    FT_Int       vmul = mode == FT_RENDER_MODE_LCD_V;
+    FT_Pos       x_shift, y_shift, x_left, y_top;
+
+    FT_Raster_Params  params;
+
+
+    /* check glyph image format */
+    if ( slot->format != render->glyph_format )
+    {
+      error = Smooth_Err_Invalid_Argument;
+      goto Exit;
+    }
+
+    /* check mode */
+    if ( mode != required_mode )
+      return Smooth_Err_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, &cbox );
+
+    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 );
+
+    width  = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
+    height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
+    bitmap = &slot->bitmap;
+    memory = render->root.memory;
+
+    width_org  = width;
+    height_org = height;
+
+    /* 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 */
+    pitch = width;
+    if ( hmul )
+    {
+      width = width * 3;
+      pitch = FT_PAD_CEIL( width, 4 );
+    }
+
+    if ( vmul )
+      height *= 3;
+
+    x_shift = (FT_Int) cbox.xMin;
+    y_shift = (FT_Int) cbox.yMin;
+    x_left  = (FT_Int)( cbox.xMin >> 6 );
+    y_top   = (FT_Int)( cbox.yMax >> 6 );
+
+#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
+
+    if ( slot->library->lcd_filter_func )
+    {
+      FT_Int  extra = slot->library->lcd_extra;
+
+
+      if ( hmul )
+      {
+        x_shift -= 64 * ( extra >> 1 );
+        width   += 3 * extra;
+        pitch    = FT_PAD_CEIL( width, 4 );
+        x_left  -= extra >> 1;
+      }
+
+      if ( vmul )
+      {
+        y_shift -= 64 * ( extra >> 1 );
+        height  += 3 * extra;
+        y_top   += extra >> 1;
+      }
+    }
+
+#endif
+
+    bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
+    bitmap->num_grays  = 256;
+    bitmap->width      = width;
+    bitmap->rows       = height;
+    bitmap->pitch      = pitch;
+
+    /* translate outline to render it into the bitmap */
+    FT_Outline_Translate( outline, -x_shift, -y_shift );
+
+    if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
+      goto Exit;
+
+    slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
+
+    /* set up parameters */
+    params.target = bitmap;
+    params.source = outline;
+    params.flags  = FT_RASTER_FLAG_AA;
+
+#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
+
+    /* implode outline if needed */
+    {
+      FT_Vector*  points     = outline->points;
+      FT_Vector*  points_end = points + outline->n_points;
+      FT_Vector*  vec;
+
+
+      if ( hmul )
+        for ( vec = points; vec < points_end; vec++ )
+          vec->x *= 3;
+
+      if ( vmul )
+        for ( vec = points; vec < points_end; vec++ )
+          vec->y *= 3;
+    }
+
+    /* render outline into the bitmap */
+    error = render->raster_render( render->raster, &params );
+
+    /* deflate outline if needed */
+    {
+      FT_Vector*  points     = outline->points;
+      FT_Vector*  points_end = points + outline->n_points;
+      FT_Vector*  vec;
+
+
+      if ( hmul )
+        for ( vec = points; vec < points_end; vec++ )
+          vec->x /= 3;
+
+      if ( vmul )
+        for ( vec = points; vec < points_end; vec++ )
+          vec->y /= 3;
+    }
+
+    if ( slot->library->lcd_filter_func )
+      slot->library->lcd_filter_func( bitmap, mode, slot->library );
+
+#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
+
+    /* render outline into bitmap */
+    error = render->raster_render( render->raster, &params );
+
+    /* expand it horizontally */
+    if ( hmul )
+    {
+      FT_Byte*  line = bitmap->buffer;
+      FT_UInt   hh;
+
+
+      for ( hh = height_org; hh > 0; hh--, line += pitch )
+      {
+        FT_UInt   xx;
+        FT_Byte*  end = line + width;
+
+
+        for ( xx = width_org; xx > 0; xx-- )
+        {
+          FT_UInt  pixel = line[xx-1];
+
+
+          end[-3] = (FT_Byte)pixel;
+          end[-2] = (FT_Byte)pixel;
+          end[-1] = (FT_Byte)pixel;
+          end    -= 3;
+        }
+      }
+    }
+
+    /* expand it vertically */
+    if ( vmul )
+    {
+      FT_Byte*  read  = bitmap->buffer + ( height - height_org ) * pitch;
+      FT_Byte*  write = bitmap->buffer;
+      FT_UInt   hh;
+
+
+      for ( hh = height_org; hh > 0; hh-- )
+      {
+        ft_memcpy( write, read, pitch );
+        write += pitch;
+
+        ft_memcpy( write, read, pitch );
+        write += pitch;
+
+        ft_memcpy( write, read, pitch );
+        write += pitch;
+        read  += pitch;
+      }
+    }
+
+#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
+
+    FT_Outline_Translate( outline, x_shift, y_shift );
+
+    if ( error )
+      goto Exit;
+
+    slot->format      = FT_GLYPH_FORMAT_BITMAP;
+    slot->bitmap_left = x_left;
+    slot->bitmap_top  = y_top;
+
+  Exit:
+    if ( outline && origin )
+      FT_Outline_Translate( outline, -origin->x, -origin->y );
+
+    return error;
+  }
+
+
+  /* convert a slot's glyph image into a bitmap */
+  static FT_Error
+  ft_smooth_render( FT_Renderer       render,
+                    FT_GlyphSlot      slot,
+                    FT_Render_Mode    mode,
+                    const FT_Vector*  origin )
+  {
+    if ( mode == FT_RENDER_MODE_LIGHT )
+      mode = FT_RENDER_MODE_NORMAL;
+
+    return ft_smooth_render_generic( render, slot, mode, origin,
+                                     FT_RENDER_MODE_NORMAL );
+  }
+
+
+  /* convert a slot's glyph image into a horizontal LCD bitmap */
+  static FT_Error
+  ft_smooth_render_lcd( FT_Renderer       render,
+                        FT_GlyphSlot      slot,
+                        FT_Render_Mode    mode,
+                        const FT_Vector*  origin )
+  {
+    FT_Error  error;
+
+    error = ft_smooth_render_generic( render, slot, mode, origin,
+                                      FT_RENDER_MODE_LCD );
+    if ( !error )
+      slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD;
+
+    return error;
+  }
+
+
+  /* convert a slot's glyph image into a vertical LCD bitmap */
+  static FT_Error
+  ft_smooth_render_lcd_v( FT_Renderer       render,
+                          FT_GlyphSlot      slot,
+                          FT_Render_Mode    mode,
+                          const FT_Vector*  origin )
+  {
+    FT_Error  error;
+
+    error = ft_smooth_render_generic( render, slot, mode, origin,
+                                      FT_RENDER_MODE_LCD_V );
+    if ( !error )
+      slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD_V;
+
+    return error;
+  }
+
+
+  FT_CALLBACK_TABLE_DEF
+  const FT_Renderer_Class  ft_smooth_renderer_class =
+  {
+    {
+      FT_MODULE_RENDERER,
+      sizeof( FT_RendererRec ),
+
+      "smooth",
+      0x10000L,
+      0x20000L,
+
+      0,    /* module specific interface */
+
+      (FT_Module_Constructor)ft_smooth_init,
+      (FT_Module_Destructor) 0,
+      (FT_Module_Requester)  0
+    },
+
+    FT_GLYPH_FORMAT_OUTLINE,
+
+    (FT_Renderer_RenderFunc)   ft_smooth_render,
+    (FT_Renderer_TransformFunc)ft_smooth_transform,
+    (FT_Renderer_GetCBoxFunc)  ft_smooth_get_cbox,
+    (FT_Renderer_SetModeFunc)  ft_smooth_set_mode,
+
+    (FT_Raster_Funcs*)    &ft_grays_raster
+  };
+
+
+  FT_CALLBACK_TABLE_DEF
+  const FT_Renderer_Class  ft_smooth_lcd_renderer_class =
+  {
+    {
+      FT_MODULE_RENDERER,
+      sizeof( FT_RendererRec ),
+
+      "smooth-lcd",
+      0x10000L,
+      0x20000L,
+
+      0,    /* module specific interface */
+
+      (FT_Module_Constructor)ft_smooth_init,
+      (FT_Module_Destructor) 0,
+      (FT_Module_Requester)  0
+    },
+
+    FT_GLYPH_FORMAT_OUTLINE,
+
+    (FT_Renderer_RenderFunc)   ft_smooth_render_lcd,
+    (FT_Renderer_TransformFunc)ft_smooth_transform,
+    (FT_Renderer_GetCBoxFunc)  ft_smooth_get_cbox,
+    (FT_Renderer_SetModeFunc)  ft_smooth_set_mode,
+
+    (FT_Raster_Funcs*)    &ft_grays_raster
+  };
+
+
+
+  FT_CALLBACK_TABLE_DEF
+  const FT_Renderer_Class  ft_smooth_lcdv_renderer_class =
+  {
+    {
+      FT_MODULE_RENDERER,
+      sizeof( FT_RendererRec ),
+
+      "smooth-lcdv",
+      0x10000L,
+      0x20000L,
+
+      0,    /* module specific interface */
+
+      (FT_Module_Constructor)ft_smooth_init,
+      (FT_Module_Destructor) 0,
+      (FT_Module_Requester)  0
+    },
+
+    FT_GLYPH_FORMAT_OUTLINE,
+
+    (FT_Renderer_RenderFunc)   ft_smooth_render_lcd_v,
+    (FT_Renderer_TransformFunc)ft_smooth_transform,
+    (FT_Renderer_GetCBoxFunc)  ft_smooth_get_cbox,
+    (FT_Renderer_SetModeFunc)  ft_smooth_set_mode,
+
+    (FT_Raster_Funcs*)    &ft_grays_raster
+  };
+
+
+/* END */