[Mesa-dev] [PATCH 3/5] i915: Correctly set the OQ counter bits.

[Eric Anholt]

While we may provide the extension, we need to tell applications that they
can't actually use it:

            An implementation can either set QUERY_COUNTER_BITS_ARB to the
            value 0, or to some number greater than or equal to n.  If an
            implementation returns 0 for QUERY_COUNTER_BITS_ARB, then the
            occlusion queries will always return that zero samples passed the
            occlusion test, and so an application should not use occlusion
            queries on that implementation.
---
 src/mesa/drivers/dri/i915/i830_context.c |    1 +
 src/mesa/drivers/dri/i915/i915_context.c |    1 +
 2 files changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i915/i830_context.c b/src/mesa/drivers/dri/i915/i830_context.c
index 524e7cb..f4b3517 100644
--- a/src/mesa/drivers/dri/i915/i830_context.c
+++ b/src/mesa/drivers/dri/i915/i830_context.c
@@ -113,6 +113,7 @@ i830CreateContext(int api,
    ctx->Const.MaxTextureMaxAnisotropy = 2.0;
 
    ctx->Const.MaxDrawBuffers = 1;
+   ctx->Const.QueryCounterBits.SamplesPassed = 0;
 
    _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
                       18 * sizeof(GLfloat));
diff --git a/src/mesa/drivers/dri/i915/i915_context.c b/src/mesa/drivers/dri/i915/i915_context.c
index 133f339..46fc966 100644
--- a/src/mesa/drivers/dri/i915/i915_context.c
+++ b/src/mesa/drivers/dri/i915/i915_context.c
@@ -262,6 +262,7 @@ i915CreateContext(int api,
    fs_options->EmitNoIndirectTemp = true;
 
    ctx->Const.MaxDrawBuffers = 1;
+   ctx->Const.QueryCounterBits.SamplesPassed = 0;
 
    _tnl_init_vertices(ctx, ctx->Const.MaxArrayLockSize + 12,
                       36 * sizeof(GLfloat));
-- 
1.7.10.4