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kc3-lang/freetype/src/raster/ftrend1.c
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David Turner
- src/raster/ftrend1.c
-
/***************************************************************************/ /* */ /* ftrend1.c */ /* */ /* The FreeType glyph rasterizer interface (body). */ /* */ /* Copyright 1996-2000 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 "ftrend1.h" #include "ftraster.h" #else #include <raster/ftrend1.h> #include <raster/ftraster.h> #endif /* initialize renderer -- init its raster */ static FT_Error ft_raster1_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 FT_Err_Ok; } /* set render-specific mode */ static FT_Error ft_raster1_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_raster1_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_raster1_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_raster1_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 rendering mode */ if ( mode != ft_render_mode_mono ) { /* raster1 is only capable of producing monochrome bitmaps */ if ( render->clazz == &ft_raster1_renderer_class ) return FT_Err_Cannot_Render_Glyph; } else { /* raster5 is only capable of producing 5-gray-levels bitmaps */ if ( render->clazz == &ft_raster5_renderer_class ) 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 */ if ( !( mode & ft_render_mode_mono ) ) { /* we pad to 32 bits, only for backwards compatibility with FT 1.x */ pitch = ( width + 3 ) & -4; bitmap->pixel_mode = ft_pixel_mode_grays; bitmap->num_grays = 256; } else { pitch = ( width + 7 ) >> 3; bitmap->pixel_mode = ft_pixel_mode_mono; } 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 = 0; if ( bitmap->pixel_mode == ft_pixel_mode_grays ) 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_CPLUSPLUS( const FT_Renderer_Class ) ft_raster1_renderer_class = { { ft_module_renderer, sizeof( FT_RendererRec ), "raster1", 0x10000L, 0x20000L, 0, /* module specific interface */ (FT_Module_Constructor)ft_raster1_init, (FT_Module_Destructor) 0, (FT_Module_Requester) 0 }, ft_glyph_format_outline, (FTRenderer_render) ft_raster1_render, (FTRenderer_transform)ft_raster1_transform, (FTRenderer_getCBox) ft_raster1_get_cbox, (FTRenderer_setMode) ft_raster1_set_mode, (FT_Raster_Funcs*) &ft_standard_raster }; /* This renderer is _NOT_ part of the default modules; you will need */ /* to register it by hand in your application. It should only be */ /* used for backwards-compatibility with FT 1.x anyway. */ /* */ FT_CPLUSPLUS( const FT_Renderer_Class ) ft_raster5_renderer_class = { { ft_module_renderer, sizeof( FT_RendererRec ), "raster5", 0x10000L, 0x20000L, 0, /* module specific interface */ (FT_Module_Constructor)ft_raster1_init, (FT_Module_Destructor) 0, (FT_Module_Requester) 0 }, ft_glyph_format_outline, (FTRenderer_render) ft_raster1_render, (FTRenderer_transform)ft_raster1_transform, (FTRenderer_getCBox) ft_raster1_get_cbox, (FTRenderer_setMode) ft_raster1_set_mode, (FT_Raster_Funcs*) &ft_standard_raster }; /* END */