[Mesa-dev] [RFC 1/6] mesa: Add types for ARB_transform_feedback_oveflow_query.

[Rafael Antognolli]

Add some basic types and storage for the queries of this extension.

Signed-off-by: Rafael Antognolli <rafael.antognolli at intel.com>
---
 src/mesa/main/mtypes.h                  |  5 +++++
 src/mesa/main/queryobj.c                | 21 +++++++++++++++++++++
 src/mesa/state_tracker/st_cb_queryobj.c |  6 ++++++
 3 files changed, 32 insertions(+)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 459725b..dd6393d 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -3001,6 +3001,10 @@ struct gl_query_state
    struct gl_query_object *PrimitivesGenerated[MAX_VERTEX_STREAMS];
    struct gl_query_object *PrimitivesWritten[MAX_VERTEX_STREAMS];
 
+   /** GL_ARB_transform_feedback_overflow_query */
+   struct gl_query_object *TransformFeedbackOverflow[MAX_VERTEX_STREAMS];
+   struct gl_query_object *TransformFeedbackOverflowAny;
+
    /** GL_ARB_timer_query */
    struct gl_query_object *TimeElapsed;
 
@@ -3870,6 +3874,7 @@ struct gl_extensions
    GLboolean ARB_transform_feedback2;
    GLboolean ARB_transform_feedback3;
    GLboolean ARB_transform_feedback_instanced;
+   GLboolean ARB_transform_feedback_overflow_query;
    GLboolean ARB_uniform_buffer_object;
    GLboolean ARB_vertex_attrib_64bit;
    GLboolean ARB_vertex_program;
diff --git a/src/mesa/main/queryobj.c b/src/mesa/main/queryobj.c
index 1fa0279..e4edb51 100644
--- a/src/mesa/main/queryobj.c
+++ b/src/mesa/main/queryobj.c
@@ -197,6 +197,16 @@ get_query_binding_point(struct gl_context *ctx, GLenum target, GLuint index)
          return &ctx->Query.PrimitivesWritten[index];
       else
          return NULL;
+   case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB:
+      if (ctx->Extensions.ARB_transform_feedback_overflow_query)
+         return &ctx->Query.TransformFeedbackOverflow[index];
+      else
+         return NULL;
+   case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB:
+      if (ctx->Extensions.ARB_transform_feedback_overflow_query)
+         return &ctx->Query.TransformFeedbackOverflowAny;
+      else
+         return NULL;
 
    case GL_VERTICES_SUBMITTED_ARB:
    case GL_PRIMITIVES_SUBMITTED_ARB:
@@ -293,6 +303,8 @@ _mesa_CreateQueries(GLenum target, GLsizei n, GLuint *ids)
    case GL_TIMESTAMP:
    case GL_PRIMITIVES_GENERATED:
    case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
+   case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB:
+   case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB:
       break;
    default:
       _mesa_error(ctx, GL_INVALID_ENUM, "glCreateQueries(invalid target = %s)",
@@ -368,6 +380,7 @@ query_error_check_index(struct gl_context *ctx, GLenum target, GLuint index)
    switch (target) {
    case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
    case GL_PRIMITIVES_GENERATED:
+   case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB:
       if (index >= ctx->Const.MaxVertexStreams) {
          _mesa_error(ctx, GL_INVALID_VALUE,
                      "glBeginQueryIndexed(index>=MaxVertexStreams)");
@@ -677,6 +690,14 @@ _mesa_GetQueryIndexediv(GLenum target, GLuint index, GLenum pname,
          case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
             *params = ctx->Const.QueryCounterBits.PrimitivesWritten;
             break;
+         case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB:
+         case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB:
+            /* The minimum value of this is 1 if it's nonzero, and the value
+             * is only ever GL_TRUE or GL_FALSE, so no sense in reporting more
+             * bits.
+             */
+            *params = 1;
+            break;
          case GL_VERTICES_SUBMITTED_ARB:
             *params = ctx->Const.QueryCounterBits.VerticesSubmitted;
             break;
diff --git a/src/mesa/state_tracker/st_cb_queryobj.c b/src/mesa/state_tracker/st_cb_queryobj.c
index 2489676..b1ac2aa 100644
--- a/src/mesa/state_tracker/st_cb_queryobj.c
+++ b/src/mesa/state_tracker/st_cb_queryobj.c
@@ -114,6 +114,12 @@ st_BeginQuery(struct gl_context *ctx, struct gl_query_object *q)
    case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
       type = PIPE_QUERY_PRIMITIVES_EMITTED;
       break;
+   case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB:
+      type = PIPE_QUERY_SO_OVERFLOW_PREDICATE;
+      break;
+   case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB:
+      type = PIPE_QUERY_SO_OVERFLOW_PREDICATE;
+      break;
    case GL_TIME_ELAPSED:
       if (st->has_time_elapsed)
          type = PIPE_QUERY_TIME_ELAPSED;
-- 
2.7.4