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-rw-r--r--src/smooth/ftsmooth.c153
1 files changed, 65 insertions, 88 deletions
diff --git a/src/smooth/ftsmooth.c b/src/smooth/ftsmooth.c
index 89088cd..3620550 100644
--- a/src/smooth/ftsmooth.c
+++ b/src/smooth/ftsmooth.c
@@ -4,7 +4,7 @@
/* */
/* Anti-aliasing renderer interface (body). */
/* */
-/* Copyright 2000-2006, 2009-2013 by */
+/* Copyright 2000-2015 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -103,25 +103,24 @@
FT_Render_Mode required_mode )
{
FT_Error error;
- FT_Outline* outline = NULL;
+ FT_Outline* outline = &slot->outline;
+ FT_Bitmap* bitmap = &slot->bitmap;
+ FT_Memory memory = render->root.memory;
FT_BBox cbox;
+ FT_Pos x_shift = 0;
+ FT_Pos y_shift = 0;
+ FT_Pos x_left, y_top;
FT_Pos width, height, pitch;
#ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
FT_Pos height_org, width_org;
#endif
- 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;
+ FT_Bool have_outline_shifted = FALSE;
+ FT_Bool have_buffer = FALSE;
/* check glyph image format */
@@ -138,73 +137,45 @@
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;
+ x_shift = origin->x;
+ y_shift = origin->y;
}
/* compute the control box, and grid fit it */
+ /* taking into account the origin shift */
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 );
+ cbox.xMin = FT_PIX_FLOOR( cbox.xMin + x_shift );
+ cbox.yMin = FT_PIX_FLOOR( cbox.yMin + y_shift );
+ cbox.xMax = FT_PIX_CEIL( cbox.xMax + x_shift );
+ cbox.yMax = FT_PIX_CEIL( cbox.yMax + y_shift );
- 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 ));
- error = FT_THROW( Raster_Overflow );
- goto Exit;
- }
- else
- width = ( cbox.xMax - cbox.xMin ) >> 6;
+ x_shift -= cbox.xMin;
+ y_shift -= cbox.yMin;
- 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 ));
- error = FT_THROW( Raster_Overflow );
- goto Exit;
- }
- else
- height = ( cbox.yMax - cbox.yMin ) >> 6;
+ x_left = cbox.xMin >> 6;
+ y_top = cbox.yMax >> 6;
+
+ width = (FT_ULong)( cbox.xMax - cbox.xMin ) >> 6;
+ height = (FT_ULong)( cbox.yMax - cbox.yMin ) >> 6;
#ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
width_org = width;
height_org = height;
#endif
- /* 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 );
+ 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 )
@@ -214,23 +185,32 @@
if ( hmul )
{
- x_shift -= 64 * ( extra >> 1 );
+ x_shift += 64 * ( extra >> 1 );
+ x_left -= 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_shift += 64 * ( extra >> 1 );
y_top += extra >> 1;
+ height += 3 * extra;
}
}
#endif
-#if FT_UINT_MAX > 0xFFFFU
+ /*
+ * 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 ||
+ x_left < FT_INT_MIN || y_top < FT_INT_MIN )
+ {
+ error = FT_THROW( Invalid_Pixel_Size );
+ goto Exit;
+ }
/* Required check is (pitch * height < FT_ULONG_MAX), */
/* but we care realistic cases only. Always pitch <= width. */
@@ -242,25 +222,38 @@
goto Exit;
}
-#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 );
- have_outline_shifted = TRUE;
+ /* 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_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
+ /* allocate new one */
+ if ( FT_ALLOC( bitmap->buffer, (FT_ULong)( pitch * height ) ) )
goto Exit;
else
have_buffer = TRUE;
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
+ slot->format = FT_GLYPH_FORMAT_BITMAP;
+ slot->bitmap_left = (FT_Int)x_left;
+ slot->bitmap_top = (FT_Int)y_top;
+
+ bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
+ bitmap->num_grays = 256;
+ bitmap->width = (unsigned int)width;
+ bitmap->rows = (unsigned int)height;
+ bitmap->pitch = pitch;
+
+ /* translate outline to render it into the bitmap */
+ if ( x_shift || y_shift )
+ {
+ FT_Outline_Translate( outline, x_shift, y_shift );
+ have_outline_shifted = TRUE;
+ }
+
/* set up parameters */
params.target = bitmap;
params.source = outline;
@@ -366,20 +359,6 @@
#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
- /*
- * 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 )
- {
- 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;
@@ -387,9 +366,7 @@
Exit:
if ( have_outline_shifted )
- FT_Outline_Translate( outline, x_shift, y_shift );
- if ( have_translated_origin )
- FT_Outline_Translate( outline, -origin->x, -origin->y );
+ FT_Outline_Translate( outline, -x_shift, -y_shift );
if ( have_buffer )
{
FT_FREE( bitmap->buffer );
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 09:43:19 +0000