| /**************************************************************************** |
| * |
| * ftrend1.c |
| * |
| * The FreeType glyph rasterizer interface (body). |
| * |
| * Copyright (C) 1996-2021 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/ftdebug.h> |
| #include <freetype/internal/ftobjs.h> |
| #include <freetype/ftoutln.h> |
| #include "ftrend1.h" |
| #include "ftraster.h" |
| |
| #include "rasterrs.h" |
| |
| |
| /* initialize renderer -- init its raster */ |
| static FT_Error |
| ft_raster1_init( FT_Renderer render ) |
| { |
| render->clazz->raster_class->raster_reset( render->raster, NULL, 0 ); |
| |
| 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, |
| const FT_Matrix* matrix, |
| const FT_Vector* delta ) |
| { |
| FT_Error error = FT_Err_Ok; |
| |
| |
| if ( slot->format != render->glyph_format ) |
| { |
| error = FT_THROW( 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 ) |
| { |
| FT_ZERO( 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_Render_Mode mode, |
| const FT_Vector* origin ) |
| { |
| FT_Error error = FT_Err_Ok; |
| FT_Outline* outline = &slot->outline; |
| FT_Bitmap* bitmap = &slot->bitmap; |
| FT_Memory memory = render->root.memory; |
| FT_Pos x_shift = 0; |
| FT_Pos y_shift = 0; |
| |
| FT_Raster_Params params; |
| |
| |
| /* check glyph image format */ |
| if ( slot->format != render->glyph_format ) |
| { |
| error = FT_THROW( Invalid_Argument ); |
| goto Exit; |
| } |
| |
| /* check rendering mode */ |
| if ( mode != FT_RENDER_MODE_MONO ) |
| { |
| /* raster1 is only capable of producing monochrome bitmaps */ |
| return FT_THROW( Cannot_Render_Glyph ); |
| } |
| |
| /* release old bitmap buffer */ |
| if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) |
| { |
| FT_FREE( bitmap->buffer ); |
| slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; |
| } |
| |
| if ( ft_glyphslot_preset_bitmap( slot, mode, origin ) ) |
| { |
| error = FT_THROW( Raster_Overflow ); |
| goto Exit; |
| } |
| |
| /* allocate new one */ |
| if ( FT_ALLOC_MULT( bitmap->buffer, bitmap->rows, bitmap->pitch ) ) |
| goto Exit; |
| |
| slot->internal->flags |= FT_GLYPH_OWN_BITMAP; |
| |
| x_shift = -slot->bitmap_left * 64; |
| y_shift = ( (FT_Int)bitmap->rows - slot->bitmap_top ) * 64; |
| |
| if ( origin ) |
| { |
| x_shift += origin->x; |
| y_shift += origin->y; |
| } |
| |
| /* translate outline to render it into the bitmap */ |
| if ( x_shift || y_shift ) |
| FT_Outline_Translate( outline, x_shift, y_shift ); |
| |
| /* set up parameters */ |
| params.target = bitmap; |
| params.source = outline; |
| params.flags = FT_RASTER_FLAG_DEFAULT; |
| |
| /* render outline into the bitmap */ |
| error = render->raster_render( render->raster, ¶ms ); |
| |
| Exit: |
| if ( !error ) |
| /* everything is fine; the glyph is now officially a bitmap */ |
| slot->format = FT_GLYPH_FORMAT_BITMAP; |
| else if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) |
| { |
| FT_FREE( bitmap->buffer ); |
| slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; |
| } |
| |
| if ( x_shift || y_shift ) |
| FT_Outline_Translate( outline, -x_shift, -y_shift ); |
| |
| return error; |
| } |
| |
| |
| FT_DEFINE_RENDERER( |
| ft_raster1_renderer_class, |
| |
| FT_MODULE_RENDERER, |
| sizeof ( FT_RendererRec ), |
| |
| "raster1", |
| 0x10000L, |
| 0x20000L, |
| |
| NULL, /* module specific interface */ |
| |
| (FT_Module_Constructor)ft_raster1_init, /* module_init */ |
| (FT_Module_Destructor) NULL, /* module_done */ |
| (FT_Module_Requester) NULL, /* get_interface */ |
| |
| FT_GLYPH_FORMAT_OUTLINE, |
| |
| (FT_Renderer_RenderFunc) ft_raster1_render, /* render_glyph */ |
| (FT_Renderer_TransformFunc)ft_raster1_transform, /* transform_glyph */ |
| (FT_Renderer_GetCBoxFunc) ft_raster1_get_cbox, /* get_glyph_cbox */ |
| (FT_Renderer_SetModeFunc) ft_raster1_set_mode, /* set_mode */ |
| |
| (FT_Raster_Funcs*)&ft_standard_raster /* raster_class */ |
| ) |
| |
| |
| /* END */ |