mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
111 lines
3.8 KiB
Diff
111 lines
3.8 KiB
Diff
diff --git a/gfx/cairo/cairo/src/cairo-xlib-surface.c b/gfx/cairo/cairo/src/cairo-xlib-surface.c
|
|
--- a/gfx/cairo/cairo/src/cairo-xlib-surface.c
|
|
+++ b/gfx/cairo/cairo/src/cairo-xlib-surface.c
|
|
@@ -1722,30 +1722,31 @@ _surface_has_alpha (cairo_xlib_surface_t
|
|
else
|
|
return FALSE;
|
|
} else {
|
|
/* In the no-render case, we never have alpha */
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
-/* Returns true if the given operator and source-alpha combination
|
|
- * requires alpha compositing to complete.
|
|
+/* Returns true if the given operator and alpha combination requires alpha
|
|
+ * compositing to complete on source and destination surfaces with the same
|
|
+ * format. i.e. if a simple bitwise copy is not appropriate.
|
|
*/
|
|
static cairo_bool_t
|
|
_operator_needs_alpha_composite (cairo_operator_t op,
|
|
- cairo_bool_t destination_has_alpha,
|
|
- cairo_bool_t source_has_alpha)
|
|
+ cairo_bool_t surfaces_have_alpha)
|
|
{
|
|
- if (op == CAIRO_OPERATOR_SOURCE ||
|
|
- (! source_has_alpha &&
|
|
- (op == CAIRO_OPERATOR_OVER ||
|
|
- op == CAIRO_OPERATOR_ATOP ||
|
|
- op == CAIRO_OPERATOR_IN)))
|
|
- return destination_has_alpha;
|
|
+ if (op == CAIRO_OPERATOR_SOURCE)
|
|
+ return FALSE;
|
|
+
|
|
+ if (op == CAIRO_OPERATOR_OVER ||
|
|
+ op == CAIRO_OPERATOR_IN ||
|
|
+ op == CAIRO_OPERATOR_ATOP)
|
|
+ return surfaces_have_alpha;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* There is a bug in most older X servers with compositing using a
|
|
* untransformed repeating source pattern when the source is in off-screen
|
|
* video memory, and another with repeated transformed images using a
|
|
* general transform matrix. When these bugs could be triggered, we need a
|
|
@@ -1843,24 +1844,24 @@ _categorize_composite_operation (cairo_x
|
|
*/
|
|
static composite_operation_t
|
|
_recategorize_composite_operation (cairo_xlib_surface_t *dst,
|
|
cairo_operator_t op,
|
|
cairo_xlib_surface_t *src,
|
|
cairo_surface_attributes_t *src_attr,
|
|
cairo_bool_t have_mask)
|
|
{
|
|
- /* Can we use the core protocol? */
|
|
+ /* Can we use the core protocol? (If _surfaces_compatible, then src and
|
|
+ * dst have the same format and _surface_has_alpha is the same for each.)
|
|
+ */
|
|
if (! have_mask &&
|
|
src->owns_pixmap &&
|
|
- src->depth == dst->depth &&
|
|
+ _surfaces_compatible (src, dst) &&
|
|
_cairo_matrix_is_integer_translation (&src_attr->matrix, NULL, NULL) &&
|
|
- ! _operator_needs_alpha_composite (op,
|
|
- _surface_has_alpha (dst),
|
|
- _surface_has_alpha (src)))
|
|
+ ! _operator_needs_alpha_composite (op, _surface_has_alpha (dst)))
|
|
{
|
|
if (src_attr->extend == CAIRO_EXTEND_NONE)
|
|
return DO_XCOPYAREA;
|
|
|
|
if (dst->buggy_repeat && src_attr->extend == CAIRO_EXTEND_REPEAT)
|
|
return DO_XTILE;
|
|
}
|
|
|
|
@@ -2211,34 +2212,28 @@ _cairo_xlib_surface_composite (cairo_ope
|
|
cairo_surface_attributes_t src_attr, mask_attr;
|
|
cairo_xlib_surface_t *dst = abstract_dst;
|
|
cairo_xlib_surface_t *src;
|
|
cairo_xlib_surface_t *mask;
|
|
cairo_int_status_t status;
|
|
composite_operation_t operation;
|
|
int itx, ity;
|
|
cairo_bool_t is_integer_translation;
|
|
- cairo_bool_t needs_alpha_composite;
|
|
GC gc;
|
|
|
|
if (mask_pattern != NULL && ! CAIRO_SURFACE_RENDER_HAS_COMPOSITE (dst))
|
|
return UNSUPPORTED ("no support for masks");
|
|
|
|
operation = _categorize_composite_operation (dst, op, src_pattern,
|
|
mask_pattern != NULL);
|
|
if (operation == DO_UNSUPPORTED)
|
|
return UNSUPPORTED ("unsupported operation");
|
|
|
|
X_DEBUG ((dst->dpy, "composite (dst=%x)", (unsigned int) dst->drawable));
|
|
|
|
- needs_alpha_composite =
|
|
- _operator_needs_alpha_composite (op,
|
|
- _surface_has_alpha (dst),
|
|
- ! _cairo_pattern_is_opaque (src_pattern));
|
|
-
|
|
_cairo_xlib_display_notify (dst->display);
|
|
|
|
status =
|
|
_cairo_xlib_surface_acquire_pattern_surfaces (dst,
|
|
src_pattern, mask_pattern,
|
|
src_x, src_y,
|
|
mask_x, mask_y,
|
|
width, height,
|