gallium: add condition parameter to render_condition

For conditional rendering this makes it possible to skip rendering
if either the predicate is true or false, as supported by d3d10
(in fact previously it was sort of implied skip rendering if predicate
is false for occlusion predicate, and true for so_overflow predicate).
There's no cap bit for this as presumably all drivers could do it trivially
(but this patch does not implement it for the drivers using true
hw predicates, nvxx, r600, radeonsi, no change is expected for OpenGL
functionality).

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

3 files changed, 5 insertions, 2 deletions

diff --git a/src/gallium/drivers/nv30/nv30_context.h b/src/gallium/drivers/nv30/nv30_context.h
index c90dd3c..3009a0c 100644
--- a/src/gallium/drivers/nv30/nv30_context.h
+++ b/src/gallium/drivers/nv30/nv30_context.h
@@ -129,6 +129,7 @@ struct nv30_context {
 
    struct pipe_query *render_cond_query;
    unsigned render_cond_mode;
+   boolean render_cond_cond;
 };
 
 static INLINE struct nv30_context *
diff --git a/src/gallium/drivers/nv30/nv30_miptree.c b/src/gallium/drivers/nv30/nv30_miptree.c
index 4f5c445..c038d70 100644
--- a/src/gallium/drivers/nv30/nv30_miptree.c
+++ b/src/gallium/drivers/nv30/nv30_miptree.c
@@ -213,7 +213,7 @@ nv30_blit(struct pipe_context *pipe,
    util_blitter_save_fragment_sampler_views(nv30->blitter,
                      nv30->fragprog.num_textures, nv30->fragprog.textures);
    util_blitter_save_render_condition(nv30->blitter, nv30->render_cond_query,
-                                      nv30->render_cond_mode);
+                                      nv30->render_cond_cond, nv30->render_cond_mode);
    util_blitter_blit(nv30->blitter, &info);
 }
 
diff --git a/src/gallium/drivers/nv30/nv30_query.c b/src/gallium/drivers/nv30/nv30_query.c
index 8774086..a0a4c67 100644
--- a/src/gallium/drivers/nv30/nv30_query.c
+++ b/src/gallium/drivers/nv30/nv30_query.c
@@ -232,7 +232,8 @@ nv30_query_result(struct pipe_context *pipe, struct pipe_query *pq,
 
 static void
 nv40_query_render_condition(struct pipe_context *pipe,
-                            struct pipe_query *pq, uint mode)
+                            struct pipe_query *pq,
+                            boolean condition, uint mode)
 {
    struct nv30_context *nv30 = nv30_context(pipe);
    struct nv30_query *q = nv30_query(pq);
@@ -240,6 +241,7 @@ nv40_query_render_condition(struct pipe_context *pipe,
 
    nv30->render_cond_query = pq;
    nv30->render_cond_mode = mode;
+   nv30->render_cond_cond = condition;
 
    if (!pq) {
       BEGIN_NV04(push, SUBC_3D(0x1e98), 1);