diff options
Diffstat (limited to 'src/3rdparty/freetype/src/smooth/ftsmooth.c')
-rw-r--r-- | src/3rdparty/freetype/src/smooth/ftsmooth.c | 127 |
1 files changed, 83 insertions, 44 deletions
diff --git a/src/3rdparty/freetype/src/smooth/ftsmooth.c b/src/3rdparty/freetype/src/smooth/ftsmooth.c index ef176bdf1e..cd034d2b40 100644 --- a/src/3rdparty/freetype/src/smooth/ftsmooth.c +++ b/src/3rdparty/freetype/src/smooth/ftsmooth.c @@ -1,19 +1,19 @@ -/***************************************************************************/ -/* */ -/* ftsmooth.c */ -/* */ -/* Anti-aliasing renderer interface (body). */ -/* */ -/* Copyright 2000-2018 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. */ -/* */ -/***************************************************************************/ +/**************************************************************************** + * + * ftsmooth.c + * + * Anti-aliasing renderer interface (body). + * + * Copyright (C) 2000-2019 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 <ft2build.h> @@ -22,7 +22,6 @@ #include FT_OUTLINE_H #include "ftsmooth.h" #include "ftgrays.h" -#include "ftspic.h" #include "ftsmerrs.h" @@ -31,6 +30,26 @@ static FT_Error ft_smooth_init( FT_Renderer render ) { + +#ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING + + FT_Vector* sub = render->root.library->lcd_geometry; + + + /* set up default subpixel geometry for striped RGB panels. */ + sub[0].x = -21; + sub[0].y = 0; + sub[1].x = 0; + sub[1].y = 0; + sub[2].x = 21; + sub[2].y = 0; + +#elif 0 /* or else, once ClearType patents expire */ + + FT_Library_SetLcdFilter( render->root.library, FT_LCD_FILTER_DEFAULT ); + +#endif + render->clazz->raster_class->raster_reset( render->raster, NULL, 0 ); return 0; @@ -130,7 +149,11 @@ slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; } - ft_glyphslot_preset_bitmap( slot, mode, origin ); + 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 ) ) @@ -220,7 +243,7 @@ } if ( lcd_filter_func ) - lcd_filter_func( bitmap, mode, lcd_weights ); + lcd_filter_func( bitmap, lcd_weights ); } #else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ @@ -235,33 +258,40 @@ unsigned int width = bitmap->width; int pitch = bitmap->pitch; + FT_Vector* sub = slot->library->lcd_geometry; - /* Render 3 separate monochrome bitmaps, shifting the outline */ - /* by 1/3 pixel. */ - width /= 3; - bitmap->buffer += width; + /* Render 3 separate monochrome bitmaps, shifting the outline. */ + width /= 3; + FT_Outline_Translate( outline, + -sub[0].x, + -sub[0].y ); error = render->raster_render( render->raster, ¶ms ); if ( error ) goto Exit; - FT_Outline_Translate( outline, -21, 0 ); - x_shift -= 21; bitmap->buffer += width; - + FT_Outline_Translate( outline, + sub[0].x - sub[1].x, + sub[0].y - sub[1].y ); error = render->raster_render( render->raster, ¶ms ); + bitmap->buffer -= width; if ( error ) goto Exit; - FT_Outline_Translate( outline, 42, 0 ); - x_shift += 42; - bitmap->buffer -= 2 * width; - + bitmap->buffer += 2 * width; + FT_Outline_Translate( outline, + sub[1].x - sub[2].x, + sub[1].y - sub[2].y ); error = render->raster_render( render->raster, ¶ms ); + bitmap->buffer -= 2 * width; if ( error ) goto Exit; + x_shift -= sub[2].x; + y_shift -= sub[2].y; + /* XXX: Rearrange the bytes according to FT_PIXEL_MODE_LCD. */ /* XXX: It is more efficient to render every third byte above. */ @@ -286,34 +316,43 @@ { int pitch = bitmap->pitch; + FT_Vector* sub = slot->library->lcd_geometry; + - /* Render 3 separate monochrome bitmaps, shifting the outline */ - /* by 1/3 pixel. Triple the pitch to render on each third row. */ + /* Render 3 separate monochrome bitmaps, shifting the outline. */ + /* Notice that the subpixel geometry vectors are rotated. */ + /* Triple the pitch to render on each third row. */ bitmap->pitch *= 3; bitmap->rows /= 3; - bitmap->buffer += pitch; - + FT_Outline_Translate( outline, + -sub[0].y, + sub[0].x ); error = render->raster_render( render->raster, ¶ms ); if ( error ) goto Exit; - FT_Outline_Translate( outline, 0, 21 ); - y_shift += 21; bitmap->buffer += pitch; - + FT_Outline_Translate( outline, + sub[0].y - sub[1].y, + sub[1].x - sub[0].x ); error = render->raster_render( render->raster, ¶ms ); + bitmap->buffer -= pitch; if ( error ) goto Exit; - FT_Outline_Translate( outline, 0, -42 ); - y_shift -= 42; - bitmap->buffer -= 2 * pitch; - + bitmap->buffer += 2 * pitch; + FT_Outline_Translate( outline, + sub[1].y - sub[2].y, + sub[2].x - sub[1].x ); error = render->raster_render( render->raster, ¶ms ); + bitmap->buffer -= 2 * pitch; if ( error ) goto Exit; + x_shift -= sub[2].y; + y_shift += sub[2].x; + bitmap->pitch /= 3; bitmap->rows *= 3; } @@ -403,7 +442,7 @@ (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, /* get_glyph_cbox */ (FT_Renderer_SetModeFunc) ft_smooth_set_mode, /* set_mode */ - (FT_Raster_Funcs*)&FT_GRAYS_RASTER_GET /* raster_class */ + (FT_Raster_Funcs*)&ft_grays_raster /* raster_class */ ) @@ -430,7 +469,7 @@ (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, /* get_glyph_cbox */ (FT_Renderer_SetModeFunc) ft_smooth_set_mode, /* set_mode */ - (FT_Raster_Funcs*)&FT_GRAYS_RASTER_GET /* raster_class */ + (FT_Raster_Funcs*)&ft_grays_raster /* raster_class */ ) @@ -457,7 +496,7 @@ (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, /* get_glyph_cbox */ (FT_Renderer_SetModeFunc) ft_smooth_set_mode, /* set_mode */ - (FT_Raster_Funcs*)&FT_GRAYS_RASTER_GET /* raster_class */ + (FT_Raster_Funcs*)&ft_grays_raster /* raster_class */ ) |