forked from minhngoc25a/freetype2
[smooth] Use `FT_Outline_Get_CBox'.
* src/smooth/ftgrays.c [STANDALONE_]: Duplicate `FT_Outline_Get_CBox'. (gray_compute_cbox): Remove this function. (gray_convert_glyph): Update to use `FT_Outline_Get_CBox'.
This commit is contained in:
Alexei Podtelezhnikov
parent
c05a1c3f04
commit
78e8fc0dad
|
|
@ -1,3 +1,11 @@
|
|||
2016-06-21 Alexei Podtelezhnikov <apodtele@gmail.com>
|
||||
|
||||
[smooth] Use `FT_Outline_Get_CBox'.
|
||||
|
||||
* src/smooth/ftgrays.c [STANDALONE_]: Duplicate `FT_Outline_Get_CBox'.
|
||||
(gray_compute_cbox): Remove this function.
|
||||
(gray_convert_glyph): Update to use `FT_Outline_Get_CBox'.
|
||||
|
||||
2016-06-20 Werner Lemberg <wl@gnu.org>
|
||||
|
||||
[smooth] Remove compiler warnings.
|
||||
|
|
|
|||
|
|
@ -1516,7 +1516,7 @@ typedef ptrdiff_t FT_PtrDist;
|
|||
|
||||
/*************************************************************************/
|
||||
/* */
|
||||
/* The following function should only compile in stand-alone mode, */
|
||||
/* The following functions should only compile in stand-alone mode, */
|
||||
/* i.e., when building this component without the rest of FreeType. */
|
||||
/* */
|
||||
/*************************************************************************/
|
||||
|
|
@ -1794,52 +1794,83 @@ typedef ptrdiff_t FT_PtrDist;
|
|||
return FT_THROW( Invalid_Outline );
|
||||
}
|
||||
|
||||
#endif /* STANDALONE_ */
|
||||
|
||||
|
||||
/*************************************************************************/
|
||||
/* */
|
||||
/* Compute the outline bounding box. */
|
||||
/* <Function> */
|
||||
/* FT_Outline_Get_CBox */
|
||||
/* */
|
||||
/* <Description> */
|
||||
/* Return an outline's `control box'. The control box encloses all */
|
||||
/* the outline's points, including Bézier control points. Though it */
|
||||
/* coincides with the exact bounding box for most glyphs, it can be */
|
||||
/* slightly larger in some situations (like when rotating an outline */
|
||||
/* that contains Bézier outside arcs). */
|
||||
/* */
|
||||
/* Computing the control box is very fast, while getting the bounding */
|
||||
/* box can take much more time as it needs to walk over all segments */
|
||||
/* and arcs in the outline. To get the latter, you can use the */
|
||||
/* `ftbbox' component, which is dedicated to this single task. */
|
||||
/* */
|
||||
/* <Input> */
|
||||
/* outline :: A pointer to the source outline descriptor. */
|
||||
/* */
|
||||
/* <Output> */
|
||||
/* acbox :: The outline's control box. */
|
||||
/* */
|
||||
/* <Note> */
|
||||
/* See @FT_Glyph_Get_CBox for a discussion of tricky fonts. */
|
||||
/* */
|
||||
|
||||
static void
|
||||
gray_compute_cbox( RAS_ARG )
|
||||
FT_Outline_Get_CBox( const FT_Outline* outline,
|
||||
FT_BBox *acbox )
|
||||
{
|
||||
FT_Outline* outline = &ras.outline;
|
||||
FT_Vector* vec = outline->points;
|
||||
FT_Vector* limit = vec + outline->n_points;
|
||||
TPos xMin, yMin, xMax, yMax;
|
||||
|
||||
|
||||
if ( outline->n_points <= 0 )
|
||||
if ( outline && acbox )
|
||||
{
|
||||
ras.min_ex = ras.max_ex = 0;
|
||||
ras.min_ey = ras.max_ey = 0;
|
||||
return;
|
||||
if ( outline->n_points == 0 )
|
||||
{
|
||||
xMin = 0;
|
||||
yMin = 0;
|
||||
xMax = 0;
|
||||
yMax = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
FT_Vector* vec = outline->points;
|
||||
FT_Vector* limit = vec + outline->n_points;
|
||||
|
||||
|
||||
xMin = xMax = vec->x;
|
||||
yMin = yMax = vec->y;
|
||||
vec++;
|
||||
|
||||
for ( ; vec < limit; vec++ )
|
||||
{
|
||||
TPos x, y;
|
||||
|
||||
|
||||
x = vec->x;
|
||||
if ( x < xMin ) xMin = x;
|
||||
if ( x > xMax ) xMax = x;
|
||||
|
||||
y = vec->y;
|
||||
if ( y < yMin ) yMin = y;
|
||||
if ( y > yMax ) yMax = y;
|
||||
}
|
||||
}
|
||||
acbox->xMin = xMin;
|
||||
acbox->xMax = xMax;
|
||||
acbox->yMin = yMin;
|
||||
acbox->yMax = yMax;
|
||||
}
|
||||
|
||||
ras.min_ex = ras.max_ex = vec->x;
|
||||
ras.min_ey = ras.max_ey = vec->y;
|
||||
|
||||
vec++;
|
||||
|
||||
for ( ; vec < limit; vec++ )
|
||||
{
|
||||
TPos x = vec->x;
|
||||
TPos y = vec->y;
|
||||
|
||||
|
||||
if ( x < ras.min_ex ) ras.min_ex = x;
|
||||
if ( x > ras.max_ex ) ras.max_ex = x;
|
||||
if ( y < ras.min_ey ) ras.min_ey = y;
|
||||
if ( y > ras.max_ey ) ras.max_ey = y;
|
||||
}
|
||||
|
||||
/* truncate the bounding box to integer pixels */
|
||||
ras.min_ex = ras.min_ex >> 6;
|
||||
ras.min_ey = ras.min_ey >> 6;
|
||||
ras.max_ex = ( ras.max_ex + 63 ) >> 6;
|
||||
ras.max_ey = ( ras.max_ey + 63 ) >> 6;
|
||||
}
|
||||
|
||||
#endif /* STANDALONE_ */
|
||||
|
||||
|
||||
typedef struct gray_TBand_
|
||||
{
|
||||
|
|
@ -1886,15 +1917,21 @@ typedef ptrdiff_t FT_PtrDist;
|
|||
static int
|
||||
gray_convert_glyph( RAS_ARG )
|
||||
{
|
||||
FT_BBox cbox;
|
||||
FT_BBox* clip;
|
||||
gray_TBand bands[40];
|
||||
gray_TBand* volatile band;
|
||||
int volatile n, num_bands;
|
||||
TPos volatile min, max, max_y;
|
||||
FT_BBox* clip;
|
||||
|
||||
|
||||
/* Set up state in the raster object */
|
||||
gray_compute_cbox( RAS_VAR );
|
||||
FT_Outline_Get_CBox( &ras.outline, &cbox );
|
||||
|
||||
/* truncate the bounding box to integer pixels */
|
||||
ras.min_ex = cbox.xMin >> 6;
|
||||
ras.min_ey = cbox.yMin >> 6;
|
||||
ras.max_ex = ( cbox.xMax + 63 ) >> 6;
|
||||
ras.max_ey = ( cbox.yMax + 63 ) >> 6;
|
||||
|
||||
/* clip to target bitmap, exit if nothing to do */
|
||||
clip = &ras.clip_box;
|
||||
|
|
|
|||
Loading…
Reference in New Issue