ref: bad92be9270c8952ca5367e6e1d48bc4d26d4fa1
dir: /src/raster/ftrend1.c/
/**************************************************************************** * * 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 */