| Summary: | XRenderCompositeGlyphs sometimes bypasses window-clipping [SNA] | ||||||
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| Product: | xorg | Reporter: | Clemens Eisserer <linuxhippy> | ||||
| Component: | Driver/intel | Assignee: | Chris Wilson <chris> | ||||
| Status: | RESOLVED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||
| Severity: | normal | ||||||
| Priority: | medium | ||||||
| Version: | unspecified | ||||||
| Hardware: | Other | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
| Attachments: |
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Bad news, it seems there are two bugs: 1. The window clipping isn't honored 2. for very long strings, there is a coordinate wrap (which does not happen with NoAccel) Long strings be damned. Grr. commit ec0866e86d365ae3fd9790b1b263d49fc4981220 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Oct 16 22:39:54 2013 +0100 sna/glyphs: Fix computation of extents for long strings And make sure we consider such overflowing strings for correct clipping against Windows. To offset the cost of doing a full extents check (~10% on aa10text), we introduce an approximate extents query (~1% on aa10text). The disparity should be rare, and should be an overestimate to force redundant clipping. Reported-by: Clemens Eisserer <linuxhippy@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70541 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> |
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Created attachment 87750 [details] testcase Running the attached testcase the text rendering isn't clipped to the coordinates of the java window, but instead I get the glyphs all over my screen. How to reproduce: 1. Compile: javac TextClipTest.java 2. Run: java -Dsun.java2d.xrender=True TextClipTest