+++ /dev/null
-/***************************************************************************/
-/* */
-/* ftsmooth.c */
-/* */
-/* Anti-aliasing renderer interface (body). */
-/* */
-/* Copyright 2000-2001 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,
- FT_Matrix* matrix,
- 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 )
- {
- MEM_Set( cbox, 0, 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( FT_Renderer render,
- FT_GlyphSlot slot,
- FT_UInt mode,
- FT_Vector* origin )
- {
- FT_Error error;
- FT_Outline* outline;
- FT_BBox cbox;
- 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 = Smooth_Err_Invalid_Argument;
- goto Exit;
- }
-
- /* check mode */
- if ( mode != ft_render_mode_normal )
- 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 &= -64;
- cbox.yMin &= -64;
- cbox.xMax = ( cbox.xMax + 63 ) & -64;
- cbox.yMax = ( cbox.yMax + 63 ) & -64;
-
- width = ( cbox.xMax - cbox.xMin ) >> 6;
- height = ( cbox.yMax - cbox.yMin ) >> 6;
- bitmap = &slot->bitmap;
- memory = render->root.memory;
-
- /* release old bitmap buffer */
- if ( slot->flags & ft_glyph_own_bitmap )
- {
- FREE( bitmap->buffer );
- slot->flags &= ~ft_glyph_own_bitmap;
- }
-
- /* allocate new one, depends on pixel format */
- pitch = width;
- bitmap->pixel_mode = ft_pixel_mode_grays;
- bitmap->num_grays = 256;
- bitmap->width = width;
- bitmap->rows = height;
- bitmap->pitch = pitch;
-
- if ( ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
- goto Exit;
-
- slot->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 = ft_raster_flag_aa;
-
- /* render outline into the bitmap */
- error = render->raster_render( render->raster, ¶ms );
- if ( error )
- goto Exit;
-
- slot->format = ft_glyph_format_bitmap;
- slot->bitmap_left = cbox.xMin >> 6;
- slot->bitmap_top = cbox.yMax >> 6;
-
- Exit:
- 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,
-
- (FTRenderer_render) ft_smooth_render,
- (FTRenderer_transform)ft_smooth_transform,
- (FTRenderer_getCBox) ft_smooth_get_cbox,
- (FTRenderer_setMode) ft_smooth_set_mode,
-
- (FT_Raster_Funcs*) &ft_grays_raster
- };
-
-
-/* END */
projects / rrdtool.git / blobdiff