Add m-esr52 at 52.6.0

1 files changed, 119 insertions, 0 deletions

diff --git a/gfx/cairo/zombie-face.patch b/gfx/cairo/zombie-face.patch
new file mode 100644
index 000000000..a4175fecc
--- /dev/null
+++ b/gfx/cairo/zombie-face.patch
@@ -0,0 +1,119 @@
+From 0238fe2cafea2e1ed19bb222117bd73ee6898d4d Mon Sep 17 00:00:00 2001
+From: Karl Tomlinson <karlt+@karlt.net>
+Date: Thu, 14 May 2009 10:46:29 +0000
+Subject: [ft] Resolve mutual referencing problems with zombie faces
+
+Bug 21706 -- zombie ft_font_face / ft_unscaled_font mutual
+             referencing problems
+[http://bugs.freedesktop.org/show_bug.cgi?id=21706]
+
+There can be more than one zombie font_face belonging to an unscaled_font,
+but only the first is destroyed.  This leaks the client's FT_Face
+(and associated font data) as release of the FT_Face depends on release
+of the font_face.
+
+(The reason why Firefox ends up with two different font_faces for one
+unscaled_font is that load_flags for faces with artificial oblique have
+FT_LOAD_NO_BITMAP set.
+https://bugzilla.mozilla.org/show_bug.cgi?id=486974)
+
+Also it's possible for _cairo_ft_font_face_create to pull out a zombie
+font_face from the unscaled_font, which would crash
+_cairo_ft_font_face_scaled_font_create, as that expects non-null
+font_face->unscaled (if !font-face->pattern).
+---
+diff --git a/AUTHORS b/AUTHORS
+index 289fecb..8c06174 100644
+--- a/AUTHORS
++++ b/AUTHORS
+@@ -86,7 +86,7 @@ Travis Spencer <tspencer@cs.pdx.edu> XCB backend fix
+ Bill Spitzak <spitzak@d2.com> Build fix to find Xrender.h without xrender.pc
+ Zhe Su <james.su@gmail.com> Add support for fontconfig's embeddedbitmap option
+ Owen Taylor <otaylor@redhat.com> Font rewrite, documentation, win32 backend
+-Karl Tomlinson <karlt+@karlt.net>
++Karl Tomlinson <karlt+@karlt.net> Optimisation and obscure bug fixes (mozilla)
+ Alp Toker <alp@atoker.com> Fix several code/comment typos
+ Malcolm Tredinnick <malcolm@commsecure.com.au> Documentation fixes
+ David Turner <david@freetype.org> Optimize gradient calculations
+diff --git a/src/cairo-ft-font.c b/src/cairo-ft-font.c
+index 1e2a18e..f9ff0b1 100644
+--- a/src/cairo-ft-font.c
++++ b/src/cairo-ft-font.c
+@@ -543,8 +543,10 @@ _cairo_ft_unscaled_font_destroy (void *abstract_font)
+ 	/* See comments in _ft_font_face_destroy about the "zombie" state
+ 	 * for a _ft_font_face.
+ 	 */
+-	if (unscaled->faces && !unscaled->faces->unscaled)
++	if (unscaled->faces && unscaled->faces->unscaled == NULL) {
++	    assert (unscaled->faces->next == NULL);
+ 	    cairo_font_face_destroy (&unscaled->faces->base);
++	}
+     } else {
+ 	_font_map_release_face_lock_held (font_map, unscaled);
+     }
+@@ -2233,9 +2235,10 @@ _cairo_ft_font_face_destroy (void *abstract_face)
+     if (font_face == NULL)
+ 	return;
+ 
+-    /* When destroying the face created by cairo_ft_font_face_create_for_ft_face,
++    /* When destroying a face created by cairo_ft_font_face_create_for_ft_face,
+      * we have a special "zombie" state for the face when the unscaled font
+-     * is still alive but there are no public references to the font face.
++     * is still alive but there are no other references to a font face with
++     * the same FT_Face.
+      *
+      * We go from:
+      *
+@@ -2249,6 +2252,8 @@ _cairo_ft_font_face_destroy (void *abstract_face)
+ 
+     if (font_face->unscaled &&
+ 	font_face->unscaled->from_face &&
++	font_face->next == NULL &&
++	font_face->unscaled->faces == font_face &&
+ 	CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1)
+     {
+ 	cairo_font_face_reference (&font_face->base);
+@@ -2394,12 +2399,21 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
+ 	    font_face->ft_options.extra_flags == ft_options->extra_flags &&
+ 	    cairo_font_options_equal (&font_face->ft_options.base, &ft_options->base))
+ 	{
+-	    if (font_face->base.status == CAIRO_STATUS_SUCCESS)
+-		return cairo_font_face_reference (&font_face->base);
++	    if (font_face->base.status) {
++		/* The font_face has been left in an error state, abandon it. */
++		*prev_font_face = font_face->next;
++		break;
++	    }
+ 
+-	    /* The font_face has been left in an error state, abandon it. */
+-	    *prev_font_face = font_face->next;
+-	    break;
++	    if (font_face->unscaled == NULL) {
++		/* Resurrect this "zombie" font_face (from
++		 * _cairo_ft_font_face_destroy), switching its unscaled_font
++		 * from owner to ownee. */
++		font_face->unscaled = unscaled;
++		_cairo_unscaled_font_reference (&unscaled->base);
++		return &font_face->base;
++	    } else
++		return cairo_font_face_reference (&font_face->base);
+ 	}
+     }
+ 
+@@ -2415,6 +2429,14 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
+ 
+     font_face->ft_options = *ft_options;
+ 
++    if (unscaled->faces && unscaled->faces->unscaled == NULL) {
++	/* This "zombie" font_face (from _cairo_ft_font_face_destroy)
++	 * is no longer needed. */
++	assert (unscaled->from_face && unscaled->faces->next == NULL);
++	cairo_font_face_destroy (&unscaled->faces->base);
++	unscaled->faces = NULL;
++    }
++
+     font_face->next = unscaled->faces;
+     unscaled->faces = font_face;
+ 
+--
+cgit v0.8.2