diff -r f3840de881bd -r 915436ff64ab misc/libfreetype/src/smooth/ftsmooth.c --- a/misc/libfreetype/src/smooth/ftsmooth.c Thu Jul 25 23:16:06 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,499 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftsmooth.c */ -/* */ -/* Anti-aliasing renderer interface (body). */ -/* */ -/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2009, 2010 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 -#include FT_INTERNAL_DEBUG_H -#include FT_INTERNAL_OBJECTS_H -#include FT_OUTLINE_H -#include "ftsmooth.h" -#include "ftgrays.h" -#include "ftspic.h" - -#include "ftsmerrs.h" - - - /* initialize renderer -- init its raster */ - static FT_Error - ft_smooth_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 0; - } - - - /* sets render-specific mode */ - static FT_Error - ft_smooth_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_smooth_transform( FT_Renderer render, - FT_GlyphSlot slot, - const FT_Matrix* matrix, - const FT_Vector* delta ) - { - FT_Error error = Smooth_Err_Ok; - - - if ( slot->format != render->glyph_format ) - { - error = Smooth_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_smooth_get_cbox( FT_Renderer render, - FT_GlyphSlot slot, - FT_BBox* cbox ) - { - FT_MEM_ZERO( cbox, 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_smooth_render_generic( FT_Renderer render, - FT_GlyphSlot slot, - FT_Render_Mode mode, - const FT_Vector* origin, - FT_Render_Mode required_mode ) - { - FT_Error error; - FT_Outline* outline = NULL; - FT_BBox cbox; - FT_UInt width, height, height_org, width_org, pitch; - FT_Bitmap* bitmap; - FT_Memory memory; - FT_Int hmul = mode == FT_RENDER_MODE_LCD; - FT_Int vmul = mode == FT_RENDER_MODE_LCD_V; - FT_Pos x_shift, y_shift, x_left, y_top; - - FT_Raster_Params params; - - - /* check glyph image format */ - if ( slot->format != render->glyph_format ) - { - error = Smooth_Err_Invalid_Argument; - goto Exit; - } - - /* check mode */ - if ( mode != required_mode ) - return Smooth_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 = FT_PIX_FLOOR( cbox.xMin ); - cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); - cbox.xMax = FT_PIX_CEIL( cbox.xMax ); - cbox.yMax = FT_PIX_CEIL( cbox.yMax ); - - if ( cbox.xMin < 0 && cbox.xMax > FT_INT_MAX + cbox.xMin ) - { - FT_ERROR(( "ft_smooth_render_generic: glyph too large:" - " xMin = %d, xMax = %d\n", - cbox.xMin >> 6, cbox.xMax >> 6 )); - return Smooth_Err_Raster_Overflow; - } - else - width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 ); - - if ( cbox.yMin < 0 && cbox.yMax > FT_INT_MAX + cbox.yMin ) - { - FT_ERROR(( "ft_smooth_render_generic: glyph too large:" - " yMin = %d, yMax = %d\n", - cbox.yMin >> 6, cbox.yMax >> 6 )); - return Smooth_Err_Raster_Overflow; - } - else - height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 ); - - bitmap = &slot->bitmap; - memory = render->root.memory; - - width_org = width; - height_org = height; - - /* release old bitmap buffer */ - if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) - { - FT_FREE( bitmap->buffer ); - slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; - } - - /* allocate new one */ - pitch = width; - if ( hmul ) - { - width = width * 3; - pitch = FT_PAD_CEIL( width, 4 ); - } - - if ( vmul ) - height *= 3; - - x_shift = (FT_Int) cbox.xMin; - y_shift = (FT_Int) cbox.yMin; - x_left = (FT_Int)( cbox.xMin >> 6 ); - y_top = (FT_Int)( cbox.yMax >> 6 ); - -#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING - - if ( slot->library->lcd_filter_func ) - { - FT_Int extra = slot->library->lcd_extra; - - - if ( hmul ) - { - x_shift -= 64 * ( extra >> 1 ); - width += 3 * extra; - pitch = FT_PAD_CEIL( width, 4 ); - x_left -= extra >> 1; - } - - if ( vmul ) - { - y_shift -= 64 * ( extra >> 1 ); - height += 3 * extra; - y_top += extra >> 1; - } - } - -#endif - -#if FT_UINT_MAX > 0xFFFFU - - /* Required check is ( pitch * height < FT_ULONG_MAX ), */ - /* but we care realistic cases only. Always pitch <= width. */ - if ( width > 0x7FFFU || height > 0x7FFFU ) - { - FT_ERROR(( "ft_smooth_render_generic: glyph too large: %u x %u\n", - width, height )); - return Smooth_Err_Raster_Overflow; - } - -#endif - - bitmap->pixel_mode = FT_PIXEL_MODE_GRAY; - bitmap->num_grays = 256; - bitmap->width = width; - bitmap->rows = height; - bitmap->pitch = pitch; - - /* translate outline to render it into the bitmap */ - FT_Outline_Translate( outline, -x_shift, -y_shift ); - - if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) ) - goto Exit; - - slot->internal->flags |= FT_GLYPH_OWN_BITMAP; - - /* set up parameters */ - params.target = bitmap; - params.source = outline; - params.flags = FT_RASTER_FLAG_AA; - -#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING - - /* implode outline if needed */ - { - FT_Vector* points = outline->points; - FT_Vector* points_end = points + outline->n_points; - FT_Vector* vec; - - - if ( hmul ) - for ( vec = points; vec < points_end; vec++ ) - vec->x *= 3; - - if ( vmul ) - for ( vec = points; vec < points_end; vec++ ) - vec->y *= 3; - } - - /* render outline into the bitmap */ - error = render->raster_render( render->raster, ¶ms ); - - /* deflate outline if needed */ - { - FT_Vector* points = outline->points; - FT_Vector* points_end = points + outline->n_points; - FT_Vector* vec; - - - if ( hmul ) - for ( vec = points; vec < points_end; vec++ ) - vec->x /= 3; - - if ( vmul ) - for ( vec = points; vec < points_end; vec++ ) - vec->y /= 3; - } - - if ( slot->library->lcd_filter_func ) - slot->library->lcd_filter_func( bitmap, mode, slot->library ); - -#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ - - /* render outline into bitmap */ - error = render->raster_render( render->raster, ¶ms ); - - /* expand it horizontally */ - if ( hmul ) - { - FT_Byte* line = bitmap->buffer; - FT_UInt hh; - - - for ( hh = height_org; hh > 0; hh--, line += pitch ) - { - FT_UInt xx; - FT_Byte* end = line + width; - - - for ( xx = width_org; xx > 0; xx-- ) - { - FT_UInt pixel = line[xx-1]; - - - end[-3] = (FT_Byte)pixel; - end[-2] = (FT_Byte)pixel; - end[-1] = (FT_Byte)pixel; - end -= 3; - } - } - } - - /* expand it vertically */ - if ( vmul ) - { - FT_Byte* read = bitmap->buffer + ( height - height_org ) * pitch; - FT_Byte* write = bitmap->buffer; - FT_UInt hh; - - - for ( hh = height_org; hh > 0; hh-- ) - { - ft_memcpy( write, read, pitch ); - write += pitch; - - ft_memcpy( write, read, pitch ); - write += pitch; - - ft_memcpy( write, read, pitch ); - write += pitch; - read += pitch; - } - } - -#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ - - FT_Outline_Translate( outline, x_shift, y_shift ); - - /* - * XXX: on 16bit system, we return an error for huge bitmap - * to prevent an overflow. - */ - if ( x_left > FT_INT_MAX || y_top > FT_INT_MAX ) - return Smooth_Err_Invalid_Pixel_Size; - - if ( error ) - goto Exit; - - slot->format = FT_GLYPH_FORMAT_BITMAP; - slot->bitmap_left = (FT_Int)x_left; - slot->bitmap_top = (FT_Int)y_top; - - Exit: - if ( outline && origin ) - FT_Outline_Translate( outline, -origin->x, -origin->y ); - - return error; - } - - - /* convert a slot's glyph image into a bitmap */ - static FT_Error - ft_smooth_render( FT_Renderer render, - FT_GlyphSlot slot, - FT_Render_Mode mode, - const FT_Vector* origin ) - { - if ( mode == FT_RENDER_MODE_LIGHT ) - mode = FT_RENDER_MODE_NORMAL; - - return ft_smooth_render_generic( render, slot, mode, origin, - FT_RENDER_MODE_NORMAL ); - } - - - /* convert a slot's glyph image into a horizontal LCD bitmap */ - static FT_Error - ft_smooth_render_lcd( FT_Renderer render, - FT_GlyphSlot slot, - FT_Render_Mode mode, - const FT_Vector* origin ) - { - FT_Error error; - - error = ft_smooth_render_generic( render, slot, mode, origin, - FT_RENDER_MODE_LCD ); - if ( !error ) - slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD; - - return error; - } - - - /* convert a slot's glyph image into a vertical LCD bitmap */ - static FT_Error - ft_smooth_render_lcd_v( FT_Renderer render, - FT_GlyphSlot slot, - FT_Render_Mode mode, - const FT_Vector* origin ) - { - FT_Error error; - - error = ft_smooth_render_generic( render, slot, mode, origin, - FT_RENDER_MODE_LCD_V ); - if ( !error ) - slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD_V; - - return error; - } - - - FT_DEFINE_RENDERER(ft_smooth_renderer_class, - - FT_MODULE_RENDERER, - sizeof( FT_RendererRec ), - - "smooth", - 0x10000L, - 0x20000L, - - 0, /* module specific interface */ - - (FT_Module_Constructor)ft_smooth_init, - (FT_Module_Destructor) 0, - (FT_Module_Requester) 0 - , - - FT_GLYPH_FORMAT_OUTLINE, - - (FT_Renderer_RenderFunc) ft_smooth_render, - (FT_Renderer_TransformFunc)ft_smooth_transform, - (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, - (FT_Renderer_SetModeFunc) ft_smooth_set_mode, - - (FT_Raster_Funcs*) &FT_GRAYS_RASTER_GET - ) - - - FT_DEFINE_RENDERER(ft_smooth_lcd_renderer_class, - - FT_MODULE_RENDERER, - sizeof( FT_RendererRec ), - - "smooth-lcd", - 0x10000L, - 0x20000L, - - 0, /* module specific interface */ - - (FT_Module_Constructor)ft_smooth_init, - (FT_Module_Destructor) 0, - (FT_Module_Requester) 0 - , - - FT_GLYPH_FORMAT_OUTLINE, - - (FT_Renderer_RenderFunc) ft_smooth_render_lcd, - (FT_Renderer_TransformFunc)ft_smooth_transform, - (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, - (FT_Renderer_SetModeFunc) ft_smooth_set_mode, - - (FT_Raster_Funcs*) &FT_GRAYS_RASTER_GET - ) - - FT_DEFINE_RENDERER(ft_smooth_lcdv_renderer_class, - - FT_MODULE_RENDERER, - sizeof( FT_RendererRec ), - - "smooth-lcdv", - 0x10000L, - 0x20000L, - - 0, /* module specific interface */ - - (FT_Module_Constructor)ft_smooth_init, - (FT_Module_Destructor) 0, - (FT_Module_Requester) 0 - , - - FT_GLYPH_FORMAT_OUTLINE, - - (FT_Renderer_RenderFunc) ft_smooth_render_lcd_v, - (FT_Renderer_TransformFunc)ft_smooth_transform, - (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, - (FT_Renderer_SetModeFunc) ft_smooth_set_mode, - - (FT_Raster_Funcs*) &FT_GRAYS_RASTER_GET - ) - - -/* END */