Issue #1274 - Part 1: Adopt the cairo version as our own.

- Move header licensing from tri-license to MPL 2.0. MPL-compatible
  other licensing has been retained where originally present.
- Remove individual superseded licensing terms.
- Remove patches, outdated readmes & incomplete patch summaries.
- Remove incomplete cairo release notes (only went up to 1.6.4 anyway).
- Rewrite COPYING to indicate the current state of the library in tree.

1 files changed, 0 insertions, 110 deletions

diff --git a/gfx/cairo/copyarea-with-alpha.patch b/gfx/cairo/copyarea-with-alpha.patch
deleted file mode 100644
index c6765105e..000000000
--- a/gfx/cairo/copyarea-with-alpha.patch
+++ /dev/null
@@ -1,110 +0,0 @@
-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,