--- /dev/null
+/***************************************************************************/
+/* */
+/* ftsmooth.c */
+/* */
+/* Anti-aliasing renderer interface (body). */
+/* */
+/* Copyright 2000 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 <freetype/internal/ftobjs.h>
+#include <freetype/ftoutln.h>
+
+
+#ifdef FT_FLAT_COMPILE
+
+#include "ftsmooth.h"
+#include "ftgrays.h"
+
+#else
+
+#include <smooth/ftsmooth.h>
+#include <smooth/ftgrays.h>
+
+#endif
+
+
+ /* 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 = FT_Err_Ok;
+
+
+ if ( slot->format != render->glyph_format )
+ {
+ error = FT_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 = FT_Err_Invalid_Argument;
+ goto Exit;
+ }
+
+ /* check mode */
+ if ( mode != ft_render_mode_normal )
+ return FT_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;
+ }
+
+
+ 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 / wxWidgets.git / blobdiff