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| author |   Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2018-05-03 13:22:14 +0200 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2018-05-04 11:09:54 +0200 |
| commit | f96bdf564f3e7511aecdd4c35cc18ac5e0750a2f (patch) | |
| tree | e0b610aaad29b30bf9af55abbb72821b43c0307f /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | drm/rect: Round above 1 << 16 upwards to correct scale calculation functions. (diff) | |
| download | linux-dev-f96bdf564f3e7511aecdd4c35cc18ac5e0750a2f.tar.xz linux-dev-f96bdf564f3e7511aecdd4c35cc18ac5e0750a2f.zip | |
drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.
Instead of relying on a scale which may increase rounding errors,
clip src by doing: src * (dst - clip) / dst and rounding the result
away from 1, so the new coordinates get closer to 1. We won't need
to fix up with a magic macro afterwards, because our scaling factor
will never go to the other side of 1.
Changes since v1:
- Adjust dst immediately, else drm_rect_width/height on dst gives bogus
results.
Change since v2:
- Get rid of macros and use 64-bits math.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
[mlankhorst: Add Villes comment, and rename newsrc to tmp. (Ville)]
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180503112217.37292-3-maarten.lankhorst@linux.intel.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions