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| author | Tom Cooksey <thomas.cooksey@nokia.com> | 2010-01-20 09:18:32 (GMT) |
|---|---|---|
| committer | Jesper Thomschutz <jesper.thomschutz@nokia.com> | 2010-01-28 15:42:54 (GMT) |
| commit | 97b2f3e45c34cdbeed7c7fa4a2aa2b42dc7cfd44 (patch) | |
| tree | c1da418b5616e2cb2b73246e4dc64619d702dea2 /doc/src/snippets/code/src_script_qscriptclass.cpp | |
| parent | 3cb0f2fc95de3920a9223764790a1385e5b74fcb (diff) | |
| download | Qt-97b2f3e45c34cdbeed7c7fa4a2aa2b42dc7cfd44.zip Qt-97b2f3e45c34cdbeed7c7fa4a2aa2b42dc7cfd44.tar.gz Qt-97b2f3e45c34cdbeed7c7fa4a2aa2b42dc7cfd44.tar.bz2 | |
Use an attribute value for the PMV matrix rather than a uniform
This has several advantages: First, updating an attribute value
seems to be cheaper than updating a uniform. Second, vertex atribute
values are independent of shader program, which means they persist
across changing of the shader program. This makes code simpler and
reduces GL state changes. Note: Credit goes to Samuel for finding
this little gem. :-)
For the 25920 solid QGraphicsRectItem test case, this gives 10%
improvement on desktop and 27% on the SGX.
Reviewed-By: Kim
Diffstat (limited to 'doc/src/snippets/code/src_script_qscriptclass.cpp')
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