[Mesa-dev] [PATCH 07/13] i965: Upload HS push constants whenever default tess. levels change.

[Kenneth Graunke]

When using tessellation on OpenGL without a TCS, default values for
gl_TessLevelOuter/gl_TessLevelInner are provided via the API.

Core Mesa will flag ctx->DriverFlags.NewDefaultTessLevels whenever those
values change.  We add a corresponding BRW_NEW_DEFAULT_TESS_LEVELS flag
and hook it up to HS push constants (which will be used to upload these
default values to the autogenerated TCS).

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/brw_context.h      | 2 ++
 src/mesa/drivers/dri/i965/brw_state_upload.c | 2 ++
 src/mesa/drivers/dri/i965/gen7_hs_state.c    | 1 +
 3 files changed, 5 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index d249bea..0239b62 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -191,6 +191,7 @@ enum brw_state_id {
    BRW_STATE_BINDING_TABLE_POINTERS,
    BRW_STATE_INDICES,
    BRW_STATE_VERTICES,
+   BRW_STATE_DEFAULT_TESS_LEVELS,
    BRW_STATE_BATCH,
    BRW_STATE_INDEX_BUFFER,
    BRW_STATE_VS_CONSTBUF,
@@ -273,6 +274,7 @@ enum brw_state_id {
 #define BRW_NEW_BINDING_TABLE_POINTERS  (1ull << BRW_STATE_BINDING_TABLE_POINTERS)
 #define BRW_NEW_INDICES                 (1ull << BRW_STATE_INDICES)
 #define BRW_NEW_VERTICES                (1ull << BRW_STATE_VERTICES)
+#define BRW_NEW_DEFAULT_TESS_LEVELS     (1ull << BRW_STATE_DEFAULT_TESS_LEVELS)
 /**
  * Used for any batch entry with a relocated pointer that will be used
  * by any 3D rendering.
diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
index ac64c8c..eb0357b 100644
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -517,6 +517,7 @@ void brw_init_state( struct brw_context *brw )
    ctx->DriverFlags.NewTextureBuffer = BRW_NEW_TEXTURE_BUFFER;
    ctx->DriverFlags.NewAtomicBuffer = BRW_NEW_ATOMIC_BUFFER;
    ctx->DriverFlags.NewImageUnits = BRW_NEW_IMAGE_UNITS;
+   ctx->DriverFlags.NewDefaultTessLevels = BRW_NEW_DEFAULT_TESS_LEVELS;
 }
 
 
@@ -619,6 +620,7 @@ static struct dirty_bit_map brw_bits[] = {
    DEFINE_BIT(BRW_NEW_BINDING_TABLE_POINTERS),
    DEFINE_BIT(BRW_NEW_INDICES),
    DEFINE_BIT(BRW_NEW_VERTICES),
+   DEFINE_BIT(BRW_NEW_DEFAULT_TESS_LEVELS),
    DEFINE_BIT(BRW_NEW_BATCH),
    DEFINE_BIT(BRW_NEW_INDEX_BUFFER),
    DEFINE_BIT(BRW_NEW_VS_CONSTBUF),
diff --git a/src/mesa/drivers/dri/i965/gen7_hs_state.c b/src/mesa/drivers/dri/i965/gen7_hs_state.c
index 63b185e..6793617 100644
--- a/src/mesa/drivers/dri/i965/gen7_hs_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_hs_state.c
@@ -49,6 +49,7 @@ const struct brw_tracked_state gen7_tcs_push_constants = {
    .dirty = {
       .mesa  = _NEW_PROGRAM_CONSTANTS,
       .brw   = BRW_NEW_BATCH |
+               BRW_NEW_DEFAULT_TESS_LEVELS |
                BRW_NEW_PUSH_CONSTANT_ALLOCATION |
                BRW_NEW_TESS_PROGRAMS |
                BRW_NEW_TCS_PROG_DATA,
-- 
2.6.4