st/mesa: add query buffer support

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

4 files changed, 103 insertions, 1 deletions

diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c
index 1951366e5e..202b4eeeef 100644
--- a/src/mesa/state_tracker/st_cb_bufferobjects.c
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.c
@@ -241,6 +241,9 @@ st_bufferobj_data(struct gl_context *ctx,
    case GL_SHADER_STORAGE_BUFFER:
       bind = PIPE_BIND_SHADER_BUFFER;
       break;
+   case GL_QUERY_BUFFER:
+      bind = PIPE_BIND_QUERY_BUFFER;
+      break;
    default:
       bind = 0;
    }
diff --git a/src/mesa/state_tracker/st_cb_queryobj.c b/src/mesa/state_tracker/st_cb_queryobj.c
index aafae16b2d..fc239bc778 100644
--- a/src/mesa/state_tracker/st_cb_queryobj.c
+++ b/src/mesa/state_tracker/st_cb_queryobj.c
@@ -39,9 +39,11 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_screen.h"
+#include "util/u_inlines.h"
 #include "st_context.h"
 #include "st_cb_queryobj.h"
 #include "st_cb_bitmap.h"
+#include "st_cb_bufferobjects.h"
 
 
 static struct gl_query_object *
@@ -271,7 +273,7 @@ st_WaitQuery(struct gl_context *ctx, struct gl_query_object *q)
    {
       /* nothing */
    }
-			    
+
    q->Ready = GL_TRUE;
 }
 
@@ -303,6 +305,98 @@ st_GetTimestamp(struct gl_context *ctx)
    }
 }
 
+static void
+st_StoreQueryResult(struct gl_context *ctx, struct gl_query_object *q,
+                    struct gl_buffer_object *buf, intptr_t offset,
+                    GLenum pname, GLenum ptype)
+{
+   struct pipe_context *pipe = st_context(ctx)->pipe;
+   struct st_query_object *stq = st_query_object(q);
+   struct st_buffer_object *stObj = st_buffer_object(buf);
+   boolean wait = pname == GL_QUERY_RESULT;
+   enum pipe_query_value_type result_type;
+   int index;
+
+   /* GL_QUERY_TARGET is a bit of an extension since it has nothing to
+    * do with the GPU end of the query. Write it in "by hand".
+    */
+   if (pname == GL_QUERY_TARGET) {
+      /* Assume that the data must be LE. The endianness situation wrt CPU and
+       * GPU is incredibly confusing, but the vast majority of GPUs are
+       * LE. When a BE one comes along, this needs some form of resolution.
+       */
+      unsigned data[2] = { CPU_TO_LE32(q->Target), 0 };
+      pipe_buffer_write(pipe, stObj->buffer, offset,
+                        (ptype == GL_INT64_ARB ||
+                         ptype == GL_UNSIGNED_INT64_ARB) ? 8 : 4,
+                        data);
+      return;
+   }
+
+   switch (ptype) {
+   case GL_INT:
+      result_type = PIPE_QUERY_TYPE_I32;
+      break;
+   case GL_UNSIGNED_INT:
+      result_type = PIPE_QUERY_TYPE_U32;
+      break;
+   case GL_INT64_ARB:
+      result_type = PIPE_QUERY_TYPE_I64;
+      break;
+   case GL_UNSIGNED_INT64_ARB:
+      result_type = PIPE_QUERY_TYPE_U64;
+      break;
+   default:
+      unreachable("Unexpected result type");
+   }
+
+   if (pname == GL_QUERY_RESULT_AVAILABLE) {
+      index = -1;
+   } else if (stq->type == PIPE_QUERY_PIPELINE_STATISTICS) {
+      switch (q->Target) {
+      case GL_VERTICES_SUBMITTED_ARB:
+         index = 0;
+         break;
+      case GL_PRIMITIVES_SUBMITTED_ARB:
+         index = 1;
+         break;
+      case GL_VERTEX_SHADER_INVOCATIONS_ARB:
+         index = 2;
+         break;
+      case GL_GEOMETRY_SHADER_INVOCATIONS:
+         index = 3;
+         break;
+      case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB:
+         index = 4;
+         break;
+      case GL_CLIPPING_INPUT_PRIMITIVES_ARB:
+         index = 5;
+         break;
+      case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB:
+         index = 6;
+         break;
+      case GL_FRAGMENT_SHADER_INVOCATIONS_ARB:
+         index = 7;
+         break;
+      case GL_TESS_CONTROL_SHADER_PATCHES_ARB:
+         index = 8;
+         break;
+      case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB:
+         index = 9;
+         break;
+      case GL_COMPUTE_SHADER_INVOCATIONS_ARB:
+         index = 10;
+         break;
+      default:
+         unreachable("Unexpected target");
+      }
+   } else {
+      index = 0;
+   }
+
+   pipe->get_query_result_resource(pipe, stq->pq, wait, result_type, index,
+                                   stObj->buffer, offset);
+}
 
 void st_init_query_functions(struct dd_function_table *functions)
 {
@@ -313,4 +407,5 @@ void st_init_query_functions(struct dd_function_table *functions)
    functions->WaitQuery = st_WaitQuery;
    functions->CheckQuery = st_CheckQuery;
    functions->GetTimestamp = st_GetTimestamp;
+   functions->StoreQueryResult = st_StoreQueryResult;
 }
diff --git a/src/mesa/state_tracker/st_cb_texturebarrier.c b/src/mesa/state_tracker/st_cb_texturebarrier.c
index 6f6176b9fe..2de150ba13 100644
--- a/src/mesa/state_tracker/st_cb_texturebarrier.c
+++ b/src/mesa/state_tracker/st_cb_texturebarrier.c
@@ -70,6 +70,9 @@ st_MemoryBarrier(struct gl_context *ctx, GLbitfield barriers)
    if (barriers & GL_SHADER_STORAGE_BARRIER_BIT)
       flags |= PIPE_BARRIER_SHADER_BUFFER;
 
+   if (barriers & GL_QUERY_BUFFER_BARRIER_BIT)
+      flags |= PIPE_BARRIER_QUERY_BUFFER;
+
    if (flags && pipe->memory_barrier)
       pipe->memory_barrier(pipe, flags);
 }
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index d06678468c..63a004345d 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -495,6 +495,7 @@ void st_init_extensions(struct pipe_screen *screen,
       { o(ARB_occlusion_query2),             PIPE_CAP_OCCLUSION_QUERY                  },
       { o(ARB_pipeline_statistics_query),    PIPE_CAP_QUERY_PIPELINE_STATISTICS        },
       { o(ARB_point_sprite),                 PIPE_CAP_POINT_SPRITE                     },
+      { o(ARB_query_buffer_object),          PIPE_CAP_QUERY_BUFFER_OBJECT              },
       { o(ARB_sample_shading),               PIPE_CAP_SAMPLE_SHADING                   },
       { o(ARB_seamless_cube_map),            PIPE_CAP_SEAMLESS_CUBE_MAP                },
       { o(ARB_shader_draw_parameters),       PIPE_CAP_DRAW_PARAMETERS                  },