1 /****************************************************************************
5 * The FreeType glyph rasterizer interface (body).
7 * Copyright (C) 1996-2020 by
8 * David Turner, Robert Wilhelm, and Werner Lemberg.
10 * This file is part of the FreeType project, and may only be used,
11 * modified, and distributed under the terms of the FreeType project
12 * license, LICENSE.TXT. By continuing to use, modify, or distribute
13 * this file you indicate that you have read the license and
14 * understand and accept it fully.
19 #include <freetype/internal/ftdebug.h>
20 #include <freetype/internal/ftobjs.h>
21 #include <freetype/ftoutln.h>
28 /* initialize renderer -- init its raster */
30 ft_raster1_init( FT_Renderer render )
32 render->clazz->raster_class->raster_reset( render->raster, NULL, 0 );
38 /* set render-specific mode */
40 ft_raster1_set_mode( FT_Renderer render,
44 /* we simply pass it to the raster */
45 return render->clazz->raster_class->raster_set_mode( render->raster,
51 /* transform a given glyph image */
53 ft_raster1_transform( FT_Renderer render,
55 const FT_Matrix* matrix,
56 const FT_Vector* delta )
58 FT_Error error = FT_Err_Ok;
61 if ( slot->format != render->glyph_format )
63 error = FT_THROW( Invalid_Argument );
68 FT_Outline_Transform( &slot->outline, matrix );
71 FT_Outline_Translate( &slot->outline, delta->x, delta->y );
78 /* return the glyph's control box */
80 ft_raster1_get_cbox( FT_Renderer render,
86 if ( slot->format == render->glyph_format )
87 FT_Outline_Get_CBox( &slot->outline, cbox );
91 /* convert a slot's glyph image into a bitmap */
93 ft_raster1_render( FT_Renderer render,
96 const FT_Vector* origin )
98 FT_Error error = FT_Err_Ok;
99 FT_Outline* outline = &slot->outline;
100 FT_Bitmap* bitmap = &slot->bitmap;
101 FT_Memory memory = render->root.memory;
105 FT_Raster_Params params;
108 /* check glyph image format */
109 if ( slot->format != render->glyph_format )
111 error = FT_THROW( Invalid_Argument );
115 /* check rendering mode */
116 if ( mode != FT_RENDER_MODE_MONO )
118 /* raster1 is only capable of producing monochrome bitmaps */
119 return FT_THROW( Cannot_Render_Glyph );
122 /* release old bitmap buffer */
123 if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
125 FT_FREE( bitmap->buffer );
126 slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
129 if ( ft_glyphslot_preset_bitmap( slot, mode, origin ) )
131 error = FT_THROW( Raster_Overflow );
135 /* allocate new one */
136 if ( FT_ALLOC_MULT( bitmap->buffer, bitmap->rows, bitmap->pitch ) )
139 slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
141 x_shift = -slot->bitmap_left * 64;
142 y_shift = ( (FT_Int)bitmap->rows - slot->bitmap_top ) * 64;
146 x_shift += origin->x;
147 y_shift += origin->y;
150 /* translate outline to render it into the bitmap */
151 if ( x_shift || y_shift )
152 FT_Outline_Translate( outline, x_shift, y_shift );
154 /* set up parameters */
155 params.target = bitmap;
156 params.source = outline;
157 params.flags = FT_RASTER_FLAG_DEFAULT;
159 /* render outline into the bitmap */
160 error = render->raster_render( render->raster, ¶ms );
164 /* everything is fine; the glyph is now officially a bitmap */
165 slot->format = FT_GLYPH_FORMAT_BITMAP;
166 else if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
168 FT_FREE( bitmap->buffer );
169 slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
172 if ( x_shift || y_shift )
173 FT_Outline_Translate( outline, -x_shift, -y_shift );
180 ft_raster1_renderer_class,
183 sizeof ( FT_RendererRec ),
189 NULL, /* module specific interface */
191 (FT_Module_Constructor)ft_raster1_init, /* module_init */
192 (FT_Module_Destructor) NULL, /* module_done */
193 (FT_Module_Requester) NULL, /* get_interface */
195 FT_GLYPH_FORMAT_OUTLINE,
197 (FT_Renderer_RenderFunc) ft_raster1_render, /* render_glyph */
198 (FT_Renderer_TransformFunc)ft_raster1_transform, /* transform_glyph */
199 (FT_Renderer_GetCBoxFunc) ft_raster1_get_cbox, /* get_glyph_cbox */
200 (FT_Renderer_SetModeFunc) ft_raster1_set_mode, /* set_mode */
202 (FT_Raster_Funcs*)&ft_standard_raster /* raster_class */