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implement clipping with surface masks.

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This implements clipping using CGContextClipToMask, which
means that it will only have an effect on OS X 10.4+.
No additional tests pass with this fix - mainly due to
text effects and problems with the IN, OUT, DEST_IN, DEST_ATOP
operators.
This commit is contained in:
Brian Ewins 2007-07-01 14:37:57 +01:00
parent b9c065df74
commit 481ce2b8cb
1 changed files with 43 additions and 0 deletions
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43
src/cairo-quartz-surface.c
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@ -89,6 +89,8 @@ CG_EXTERN void CGContextReplacePathWithStrokedPath (CGContextRef);
CG_EXTERN CGImageRef CGBitmapContextCreateImage (CGContextRef);
#endif
/* missing in 10.3.9 */
extern void CGContextClipToMask (CGContextRef, CGRect, CGImageRef) __attribute__((weak_import));
/*
* Utility functions
@ -1503,6 +1505,43 @@ _cairo_quartz_surface_show_glyphs (void *abstract_surface,
}
#endif /* CAIRO_HAS_ATSUI_FONT */
static cairo_status_t
_cairo_quartz_surface_mask_with_surface (cairo_quartz_surface_t *surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_surface_pattern_t *mask)
{
cairo_rectangle_int16_t extents;
cairo_quartz_surface_t *quartz_surf;
CGRect rect;
CGImageRef img;
cairo_surface_t *pat_surf = mask->surface;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
status = _cairo_surface_get_extents (pat_surf, &extents);
if (status)
return status;
quartz_surf = _cairo_quartz_surface_to_quartz (NULL, pat_surf);
img = CGBitmapContextCreateImage (quartz_surf->cgContext);
if (!img) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto BAIL;
}
rect = CGRectMake (-mask->base.matrix.x0, -mask->base.matrix.y0, extents.width, extents.height);
CGContextSaveGState (surface->cgContext);
CGContextClipToMask (surface->cgContext, rect, img);
status = _cairo_quartz_surface_paint (surface, op, source);
CGContextRestoreGState (surface->cgContext);
CGImageRelease (img);
BAIL:
cairo_surface_destroy ((cairo_surface_t*) quartz_surf);
return status;
}
static cairo_int_status_t
_cairo_quartz_surface_mask (void *abstract_surface,
cairo_operator_t op,
@ -1519,6 +1558,10 @@ _cairo_quartz_surface_mask (void *abstract_surface,
cairo_solid_pattern_t *solid_mask = (cairo_solid_pattern_t *) mask;
CGContextSetAlpha (surface->cgContext, solid_mask->color.alpha);
} else if (CGContextClipToMask &&
mask->type == CAIRO_PATTERN_TYPE_SURFACE &&
mask->extend == CAIRO_EXTEND_NONE) {
return _cairo_quartz_surface_mask_with_surface (surface, op, source, (cairo_surface_pattern_t *) mask);
} else {
/* So, CGContextClipToMask is not present in 10.3.9, so we're
* doomed; if we have imageData, we can do fallback, otherwise