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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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gfx/cairo/fix-xcopyarea-with-clips.patch Normal file
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@ -0,0 +1,38 @@
From: Benjamin Otte <otte@redhat.com>
Date: Thu, 29 Apr 2010 16:20:59 +0000
Subject: xlib: Don't modify variables that are needed later
In the XCopyArea region code, don't modify src_x/y when they are later
used in the unbounded fixup code.
Exposed by composite-integer-translate-source test.
---
diff --git a/src/cairo-xlib-surface.c b/src/cairo-xlib-surface.c
index bedc3fd..30c08d3 100644
--- a/gfx/cairo/cairo/src/cairo-xlib-surface.c
+++ b/gfx/cairo/cairo/src/cairo-xlib-surface.c
@@ -2322,10 +2322,10 @@ _cairo_xlib_surface_composite (cairo_operator_t op,
width, height,
dst_x, dst_y);
} else {
- int n, num_rects;
+ int n, num_rects, x, y;
- src_x += src_attr.x_offset + itx - dst_x;
- src_y += src_attr.y_offset + ity - dst_y;
+ x = src_x + src_attr.x_offset + itx - dst_x;
+ y = src_y + src_attr.y_offset + ity - dst_y;
num_rects = cairo_region_num_rectangles (clip_region);
for (n = 0; n < num_rects; n++) {
@@ -2333,7 +2333,7 @@ _cairo_xlib_surface_composite (cairo_operator_t op,
cairo_region_get_rectangle (clip_region, n, &rect);
XCopyArea (dst->dpy, src->drawable, dst->drawable, gc,
- rect.x + src_x, rect.y + src_y,
+ rect.x + x, rect.y + y,
rect.width, rect.height,
rect.x, rect.y);
}
--
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