diff options
Diffstat (limited to 'src/smooth/ftsmooth.c')
-rw-r--r-- | src/smooth/ftsmooth.c | 80 |
1 files changed, 55 insertions, 25 deletions
diff --git a/src/smooth/ftsmooth.c b/src/smooth/ftsmooth.c index 00499cc..89088cd 100644 --- a/src/smooth/ftsmooth.c +++ b/src/smooth/ftsmooth.c @@ -4,7 +4,7 @@ /* */ /* Anti-aliasing renderer interface (body). */ /* */ -/* Copyright 2000-2006, 2009-2012 by */ +/* Copyright 2000-2006, 2009-2013 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -61,12 +61,12 @@ const FT_Matrix* matrix, const FT_Vector* delta ) { - FT_Error error = Smooth_Err_Ok; + FT_Error error = FT_Err_Ok; if ( slot->format != render->glyph_format ) { - error = Smooth_Err_Invalid_Argument; + error = FT_THROW( Invalid_Argument ); goto Exit; } @@ -109,31 +109,43 @@ #ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING FT_Pos height_org, width_org; #endif - 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_Bitmap* bitmap = &slot->bitmap; + FT_Memory memory = render->root.memory; + FT_Int hmul = mode == FT_RENDER_MODE_LCD; + FT_Int vmul = mode == FT_RENDER_MODE_LCD_V; + FT_Pos x_shift = 0; + FT_Pos y_shift = 0; + FT_Pos x_left, y_top; FT_Raster_Params params; + FT_Bool have_translated_origin = FALSE; + FT_Bool have_outline_shifted = FALSE; + FT_Bool have_buffer = FALSE; + /* check glyph image format */ if ( slot->format != render->glyph_format ) { - error = Smooth_Err_Invalid_Argument; + error = FT_THROW( Invalid_Argument ); goto Exit; } /* check mode */ if ( mode != required_mode ) - return Smooth_Err_Cannot_Render_Glyph; + { + error = FT_THROW( Cannot_Render_Glyph ); + goto Exit; + } outline = &slot->outline; /* translate the outline to the new origin if needed */ if ( origin ) + { FT_Outline_Translate( outline, origin->x, origin->y ); + have_translated_origin = TRUE; + } /* compute the control box, and grid fit it */ FT_Outline_Get_CBox( outline, &cbox ); @@ -148,24 +160,23 @@ 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; + error = FT_THROW( Raster_Overflow ); + goto Exit; } else - width = ( cbox.xMax - cbox.xMin ) >> 6; + width = ( 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; + error = FT_THROW( Raster_Overflow ); + goto Exit; } else height = ( cbox.yMax - cbox.yMin ) >> 6; - bitmap = &slot->bitmap; - memory = render->root.memory; - #ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING width_org = width; height_org = height; @@ -221,13 +232,14 @@ #if FT_UINT_MAX > 0xFFFFU - /* Required check is ( pitch * height < FT_ULONG_MAX ), */ - /* but we care realistic cases only. Always pitch <= width. */ + /* Required check is (pitch * height < FT_ULONG_MAX), */ + /* but we care realistic cases only. Always pitch <= width. */ if ( width > 0x7FFF || height > 0x7FFF ) { FT_ERROR(( "ft_smooth_render_generic: glyph too large: %u x %u\n", width, height )); - return Smooth_Err_Raster_Overflow; + error = FT_THROW( Raster_Overflow ); + goto Exit; } #endif @@ -240,9 +252,12 @@ /* translate outline to render it into the bitmap */ FT_Outline_Translate( outline, -x_shift, -y_shift ); + have_outline_shifted = TRUE; if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) ) goto Exit; + else + have_buffer = TRUE; slot->internal->flags |= FT_GLYPH_OWN_BITMAP; @@ -288,6 +303,9 @@ vec->y /= 3; } + if ( error ) + goto Exit; + if ( slot->library->lcd_filter_func ) slot->library->lcd_filter_func( bitmap, mode, slot->library ); @@ -295,6 +313,8 @@ /* render outline into bitmap */ error = render->raster_render( render->raster, ¶ms ); + if ( error ) + goto Exit; /* expand it horizontally */ if ( hmul ) @@ -346,25 +366,35 @@ #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 ) + { + error = FT_THROW( Invalid_Pixel_Size ); goto Exit; + } slot->format = FT_GLYPH_FORMAT_BITMAP; slot->bitmap_left = (FT_Int)x_left; slot->bitmap_top = (FT_Int)y_top; + /* everything is fine; don't deallocate buffer */ + have_buffer = FALSE; + + error = FT_Err_Ok; + Exit: - if ( outline && origin ) + if ( have_outline_shifted ) + FT_Outline_Translate( outline, x_shift, y_shift ); + if ( have_translated_origin ) FT_Outline_Translate( outline, -origin->x, -origin->y ); + if ( have_buffer ) + { + FT_FREE( bitmap->buffer ); + slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; + } return error; } |