[1/3] wined3d: Constant load optimisations

Norbert Lataille nlataill at gmail.com
Sat Aug 20 11:46:47 CDT 2011


This patch is using forcing -1 to locations of unused shader constants.
Without this patch, when a game is setting up DX shader constants
(shared between all shaders
in the DX model), wined3d will replicate constants to all GL programs.
This can cause a lot of unnecessary glUniform4fv() calls when a game
switches between multiple shaders.

Performance gains (for parts 1/2/3) on WoW:
Results for 3dmark06, X3: http://norbert.lataille.free.fr/perf.html
(line: Constants).

Comments are welcome,


 dlls/wined3d/glsl_shader.c |   20 ++++++++++++++++++--
 1 files changed, 18 insertions(+), 2 deletions(-)
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