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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - painting an xlib surface with source set to another surface created with cairo_image_surface_create_from_png fails if xlib surface is set to the exact size of the png image."
href="https://bugs.freedesktop.org/show_bug.cgi?id=103614">103614</a>
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<th>Summary</th>
<td>painting an xlib surface with source set to another surface created with cairo_image_surface_create_from_png fails if xlib surface is set to the exact size of the png image.
</td>
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<th>Product</th>
<td>cairo
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>png functions
</td>
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<th>Assignee</th>
<td>cworth@cworth.org
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<th>Reporter</th>
<td>stef_sport_2002@yahoo.it
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<th>QA Contact</th>
<td>cairo-bugs@cairographics.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=135294" name="attach_135294" title="small C program showing the bug, look at tag 'bug #3' in the source for details.">attachment 135294</a> <a href="attachment.cgi?id=135294&action=edit" title="small C program showing the bug, look at tag 'bug #3' in the source for details.">[details]</a></span>
small C program showing the bug, look at tag '<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Should provide empty local.conf file"
href="show_bug.cgi?id=3">bug #3</a>' in the source for
details.
I created a surface:
image = cairo_image_surface_create_from_png(argv[1]);
x = cairo_image_surface_get_width (image);
y = cairo_image_surface_get_height (image);
then i created an xlib surface and set the png surface as source for painting:
sfc = cairo_xlib_surface_create(display, window, visual, x, y);
cairo_xlib_surface_set_size(sfc, x, y);
ctx = cairo_create(sfc);
cairo_set_source_surface(ctx, image, 0., 0.);
Painting the xlib:
cairo_paint(ctx);
fails (get only background of xlib window) unless i add one pixel to the
xlib surface:
cairo_xlib_surface_set_size(sfc, x+1, y);
This behavior happens on all debian linux machines i have access to,
but does NOT happen on a very old rhel5 server with a (much)older cairo
revision.
Test program attached. I hope i am not doing something wrong, i checked the
test case line by line and to me it seems correct.
Stefan</pre>
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