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authorEric Anholt <eric@anholt.net>2016-07-14 17:26:43 -0700
committerEric Anholt <eric@anholt.net>2016-07-15 13:54:00 -0700
commit3bcd0f1912a60cc9d3813923d18d29465e41ff56 (patch)
treea453cbfb302a1e70b0704c3725f9ce6e5172db0d /src/gallium/drivers/vc4/vc4_context.h
parent88152d7dc0e2cf233cd2c38a4e9affb1ea73fa97 (diff)
vc4: Speed up glGenerateMipmaps by avoiding shadow baselevel.
To support general GL_TEXTURE_BASE_LEVEL we have to copy to a temporary miptree. However, if a single level is being selected, we can use the existing miptree and force all the sampling to be from that particular level. This avoids a ton of software fallbacks in glGenerateMipmaps(), which uses base levels in the blit implementation in gallium. Improves "glmark2 -b terrain" from 2 fps to 3 (perhaps some more precision would be useful?), and cuts its CPU usage during the benchmarking from ~30% to ~10% (total CPU time from 8.8s to 7.6s).
Diffstat (limited to 'src/gallium/drivers/vc4/vc4_context.h')
-rw-r--r--src/gallium/drivers/vc4/vc4_context.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_context.h b/src/gallium/drivers/vc4/vc4_context.h
index 7da2b554e49..751f0437807 100644
--- a/src/gallium/drivers/vc4/vc4_context.h
+++ b/src/gallium/drivers/vc4/vc4_context.h
@@ -74,6 +74,7 @@ struct vc4_sampler_view {
struct pipe_sampler_view base;
uint32_t texture_p0;
uint32_t texture_p1;
+ bool force_first_level;
};
struct vc4_sampler_state {