162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
#include <freetype/internal/ftobjs.h>
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/* sets render-specific mode */
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static FT_Error ft_renderer_set_mode( FT_Renderer render,
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FT_ULong mode_tag,
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FT_Pointer data )
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{
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/* we simply pass it to the raster */
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return render->clazz->raster_class->raster_set_mode(
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render->raster, mode_tag, data );
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}
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/* convert a slot's glyph image into a bitmap */
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static FT_Error ft_renderer_render( FT_Renderer render,
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FT_GlyphSlot slot,
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FT_UInt mode )
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{
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FT_Error error;
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FT_Outline* outline;
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FT_BBox cbox;
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FT_UInt width, height, pitch;
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FT_Bitmap* bitmap;
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FT_Memory memory;
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FT_Raster_Params params;
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/* first of all, transform the outline */
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if (slot->format != ft_glyph_format_outline)
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{
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error = FT_Err_Invalid_Argument;
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goto Exit;
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}
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outline = &slot->outline;
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FT_Outline_Transform( outline, &slot->transform_matrix );
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FT_Outline_Translate( outline, slot->transform_delta.x,
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slot->transform_delta.y );
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/* compute the control box, and grid fit it */
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FT_Outline_Get_CBox( outline, &cbox );
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cbox.xMin &= -64;
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cbox.yMin &= -64;
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cbox.xMax = (cbox.xMax+63) & -64;
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cbox.yMax = (cbox.yMax+63) & -64;
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width = (cbox.xMax - cbox.xMin) >> 6;
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height = (cbox.yMax - cbox.yMin) >> 6;
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bitmap = &slot->bitmap;
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memory = slot->face->memory;
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/* release old bitmap buffer */
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if ((slot->flags & ft_glyph_own_bitmap))
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FREE(bitmap->buffer);
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/* allocate new one, depends on pixel format */
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if ( mode & ft_render_mode_antialias )
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{
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pitch = width;
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bitmap->pixel_mode = ft_pixel_mode_grays;
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bitmap->num_grays = 256;
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}
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else
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{
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pitch = (width+7) >> 3;
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bitmap->pixel_mode = ft_pixel_mode_mono;
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}
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bitmap->width = width;
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bitmap->rows = height;
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bitmap->pitch = pitch;
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if (ALLOC( bitmap->buffer, (FT_ULong)pitch * height ))
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goto Exit;
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/* translate outline to render it into the bitmap */
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FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
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/* set up parameters */
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params.target = bitmap;
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params.source = outline;
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params.flags = 0;
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if ( bitmap->pixel_mode == ft_pixel_mode_grays )
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params.flags |= ft_raster_flag_aa;
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/* render outline into the bitmap */
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error = render->render( render->raster, ¶ms );
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if (error) goto Exit;
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slot->format = ft_glyph_format_bitmap;
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slot->bitmap_left = cbox.xMin >> 6;
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slot->bitmap_top = cbox.yMax >> 6;
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Exit:
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return error;
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}
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#ifndef FT_CONFIG_OPTION_NO_STD_RASTER
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#include <freetype/ftraster.h>
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const FT_Renderer_Class ft_standard_renderer_class =
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{
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{
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ft_module_renderer,
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sizeof( FT_RendererRec ),
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"standard renderer",
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0x10000,
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0x20000,
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0, /* module specific interface */
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(FT_Module_Constructor) 0,
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(FT_Module_Destructor) 0,
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(FT_Module_Requester) 0
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},
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ft_glyph_format_outline,
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(FTRenderer_render) ft_renderer_render,
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(FTRenderer_setMode) ft_renderer_set_mode,
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(FT_Raster_Funcs*) &ft_standard_raster
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};
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#endif /* !FT_CONFIG_OPTION_NO_STD_RASTER */
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#ifndef FT_CONFIG_OPTION_NO_SMOOTH_RASTER
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#include <freetype/ftgrays.h>
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const FT_Renderer_Class ft_smooth_renderer_class =
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{
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{
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ft_module_renderer,
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sizeof( FT_RendererRec ),
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"smooth renderer",
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0x10000,
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0x20000,
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0, /* module specific interface */
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(FT_Module_Constructor) 0,
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(FT_Module_Destructor) 0,
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(FT_Module_Requester) 0
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},
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ft_glyph_format_outline,
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(FTRenderer_render) ft_renderer_render,
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(FTRenderer_setMode) ft_renderer_set_mode,
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(FT_Raster_Funcs*) &ft_grays_raster
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};
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#endif /* !FT_CONFIG_OPTION_NO_SMOOTH_RASTER */
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