mesa: Add support for the ARB_pipeline_statistics_query extension

This was originally part of a single patch which added the extension, and
implemented it for i965 classic. For information about the evolution of the
patch, please see the subsequent commit.

One difference here as compared to the original mega patch is this does build
support for the compute shader query. Since it cannot be tested on any platform,
it will always return NULL for now. Jordan has already written a patch to
address this, and when that patch lands, this logic can be modified.

v2: Fix typo in subject (Brian Paul)
Add checks for desktop gl (Ilia)
Fail for any callers for now (Ilia)
Update QueryCounterBits for new tokens (Ilia)
Jordan: Use _mesa_has_compute_shaders

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

v3: Rebased on patch which adds the proper information to unstub tessellation
shaders.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

7 files changed, 136 insertions, 0 deletions

diff --git a/src/mapi/glapi/gen/ARB_pipeline_statistics_query.xml b/src/mapi/glapi/gen/ARB_pipeline_statistics_query.xml
new file mode 100644
index 0000000000..5e85117839
--- /dev/null
+++ b/src/mapi/glapi/gen/ARB_pipeline_statistics_query.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+<!DOCTYPE OpenGLAPI SYSTEM "gl_API.dtd">
+
+<!-- Note: no GLX protocol info yet. -->
+
+<OpenGLAPI>
+
+<category name="GL_ARB_pipeline_statistics_query" number="171">
+
+  <enum name="VERTICES_SUBMITTED_ARB"                      value="0x82EE"/>
+  <enum name="PRIMITIVES_SUBMITTED_ARB"                    value="0x82EF"/>
+  <enum name="VERTEX_SHADER_INVOCATIONS_ARB"               value="0x82F0"/>
+  <enum name="TESS_CONTROL_SHADER_PATCHES_ARB"             value="0x82F1"/>
+  <enum name="TESS_EVALUATION_SHADER_INVOCATIONS_ARB"      value="0x82F2"/>
+  <!-- <enum name="GEOMETRY_SHADER_INVOCATIONS"             value="0x887F"/> -->
+  <enum name="GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB"      value="0x82F3"/>
+  <enum name="FRAGMENT_SHADER_INVOCATIONS_ARB"             value="0x82F4"/>
+  <enum name="COMPUTE_SHADER_INVOCATIONS_ARB"              value="0x82F5"/>
+  <enum name="CLIPPING_INPUT_PRIMITIVES_ARB"               value="0x82F6"/>
+  <enum name="CLIPPING_OUTPUT_PRIMITIVES_ARB"              value="0x82F7"/>
+
+</category>
+
+</OpenGLAPI>
diff --git a/src/mapi/glapi/gen/Makefile.am b/src/mapi/glapi/gen/Makefile.am
index 35d9d011f4..28973c49f1 100644
--- a/src/mapi/glapi/gen/Makefile.am
+++ b/src/mapi/glapi/gen/Makefile.am
@@ -138,6 +138,7 @@ API_XML = \
 	ARB_invalidate_subdata.xml \
 	ARB_map_buffer_range.xml \
 	ARB_multi_bind.xml \
+	ARB_pipeline_statistics_query.xml \
 	ARB_robustness.xml \
 	ARB_sample_shading.xml \
 	ARB_sampler_objects.xml \
diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index cc8aaf34e8..41b34014f1 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -8389,6 +8389,9 @@
 
 <xi:include href="KHR_context_flush_control.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 
+<!-- ARB extension 171 -->
+<xi:include href="ARB_pipeline_statistics_query.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
+
 <!-- Non-ARB extensions sorted by extension number. -->
 
 <category name="GL_EXT_blend_color" number="2">
diff --git a/src/mesa/main/config.h b/src/mesa/main/config.h
index 08e1a14625..5a66a4eec9 100644
--- a/src/mesa/main/config.h
+++ b/src/mesa/main/config.h
@@ -300,6 +300,9 @@
 #define MAX_COMPUTE_IMAGE_UNIFORMS          8
 /*@}*/
 
+/** For GL_ARB_pipeline_statistics_query */
+#define MAX_PIPELINE_STATISTICS             11
+
 /*
  * Color channel component order
  * 
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index c4293e7e79..4af108ff19 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -134,6 +134,7 @@ static const struct extension extension_table[] = {
    { "GL_ARB_multitexture",                        o(dummy_true),                              GLL,            1998 },
    { "GL_ARB_occlusion_query2",                    o(ARB_occlusion_query2),                    GL,             2003 },
    { "GL_ARB_occlusion_query",                     o(ARB_occlusion_query),                     GLL,            2001 },
+   { "GL_ARB_pipeline_statistics_query",           o(ARB_pipeline_statistics_query),           GL,             2014 },
    { "GL_ARB_pixel_buffer_object",                 o(EXT_pixel_buffer_object),                 GL,             2004 },
    { "GL_ARB_point_parameters",                    o(EXT_point_parameters),                    GLL,            1997 },
    { "GL_ARB_point_sprite",                        o(ARB_point_sprite),                        GL,             2003 },
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 87bcfe28a0..05e95759cd 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -3072,6 +3072,9 @@ struct gl_query_state
    /** GL_ARB_timer_query */
    struct gl_query_object *TimeElapsed;
 
+   /** GL_ARB_pipeline_statistics_query */
+   struct gl_query_object *pipeline_stats[MAX_PIPELINE_STATISTICS];
+
    GLenum CondRenderMode;
 };
 
@@ -3458,6 +3461,17 @@ struct gl_constants
       GLuint Timestamp;
       GLuint PrimitivesGenerated;
       GLuint PrimitivesWritten;
+      GLuint VerticesSubmitted;
+      GLuint PrimitivesSubmitted;
+      GLuint VsInvocations;
+      GLuint TessPatches;
+      GLuint TessInvocations;
+      GLuint GsInvocations;
+      GLuint GsPrimitives;
+      GLuint FsInvocations;
+      GLuint ComputeInvocations;
+      GLuint ClInPrimitives;
+      GLuint ClOutPrimitives;
    } QueryCounterBits;
 
    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
@@ -3754,6 +3768,7 @@ struct gl_extensions
    GLboolean ARB_map_buffer_range;
    GLboolean ARB_occlusion_query;
    GLboolean ARB_occlusion_query2;
+   GLboolean ARB_pipeline_statistics_query;
    GLboolean ARB_point_sprite;
    GLboolean ARB_sample_shading;
    GLboolean ARB_seamless_cube_map;
diff --git a/src/mesa/main/queryobj.c b/src/mesa/main/queryobj.c
index 932359c4e7..1b19afe4ba 100644
--- a/src/mesa/main/queryobj.c
+++ b/src/mesa/main/queryobj.c
@@ -142,6 +142,18 @@ _mesa_init_query_object_functions(struct dd_function_table *driver)
    driver->CheckQuery = _mesa_check_query;
 }
 
+static struct gl_query_object **
+get_pipe_stats_binding_point(struct gl_context *ctx,
+                             GLenum target)
+{
+   if (!_mesa_is_desktop_gl(ctx) ||
+       !ctx->Extensions.ARB_pipeline_statistics_query)
+      return NULL;
+
+   const int which = target - GL_VERTICES_SUBMITTED_ARB;
+   assert(which < MAX_PIPELINE_STATISTICS);
+   return &ctx->Query.pipeline_stats[which];
+}
 
 /**
  * Return pointer to the query object binding point for the given target and
@@ -183,6 +195,38 @@ get_query_binding_point(struct gl_context *ctx, GLenum target, GLuint index)
          return &ctx->Query.PrimitivesWritten[index];
       else
          return NULL;
+
+   case GL_VERTICES_SUBMITTED_ARB:
+   case GL_PRIMITIVES_SUBMITTED_ARB:
+   case GL_VERTEX_SHADER_INVOCATIONS_ARB:
+   case GL_FRAGMENT_SHADER_INVOCATIONS_ARB:
+   case GL_CLIPPING_INPUT_PRIMITIVES_ARB:
+   case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB:
+         return get_pipe_stats_binding_point(ctx, target);
+
+   case GL_GEOMETRY_SHADER_INVOCATIONS:
+      /* GL_GEOMETRY_SHADER_INVOCATIONS is defined in a non-sequential order */
+      target = GL_VERTICES_SUBMITTED_ARB + MAX_PIPELINE_STATISTICS - 1;
+      /* fallthrough */
+   case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB:
+      if (_mesa_has_geometry_shaders(ctx))
+         return get_pipe_stats_binding_point(ctx, target);
+      else
+         return NULL;
+
+   case GL_TESS_CONTROL_SHADER_PATCHES_ARB:
+   case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB:
+      if (ctx->Extensions.ARB_tessellation_shader)
+         return get_pipe_stats_binding_point(ctx, target);
+      else
+         return NULL;
+
+   case GL_COMPUTE_SHADER_INVOCATIONS_ARB:
+      if (_mesa_has_compute_shaders(ctx))
+         return get_pipe_stats_binding_point(ctx, target);
+      else
+         return NULL;
+
    default:
       return NULL;
    }
@@ -553,6 +597,39 @@ _mesa_GetQueryIndexediv(GLenum target, GLuint index, GLenum pname,
          case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
             *params = ctx->Const.QueryCounterBits.PrimitivesWritten;
             break;
+         case GL_VERTICES_SUBMITTED_ARB:
+            *params = ctx->Const.QueryCounterBits.VerticesSubmitted;
+            break;
+         case GL_PRIMITIVES_SUBMITTED_ARB:
+            *params = ctx->Const.QueryCounterBits.PrimitivesSubmitted;
+            break;
+         case GL_VERTEX_SHADER_INVOCATIONS_ARB:
+            *params = ctx->Const.QueryCounterBits.VsInvocations;
+            break;
+         case GL_TESS_CONTROL_SHADER_PATCHES_ARB:
+            *params = ctx->Const.QueryCounterBits.TessPatches;
+            break;
+         case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB:
+            *params = ctx->Const.QueryCounterBits.TessInvocations;
+            break;
+         case GL_GEOMETRY_SHADER_INVOCATIONS:
+            *params = ctx->Const.QueryCounterBits.GsInvocations;
+            break;
+         case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB:
+            *params = ctx->Const.QueryCounterBits.GsPrimitives;
+            break;
+         case GL_FRAGMENT_SHADER_INVOCATIONS_ARB:
+            *params = ctx->Const.QueryCounterBits.FsInvocations;
+            break;
+         case GL_COMPUTE_SHADER_INVOCATIONS_ARB:
+            *params = ctx->Const.QueryCounterBits.ComputeInvocations;
+            break;
+         case GL_CLIPPING_INPUT_PRIMITIVES_ARB:
+            *params = ctx->Const.QueryCounterBits.ClInPrimitives;
+            break;
+         case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB:
+            *params = ctx->Const.QueryCounterBits.ClOutPrimitives;
+            break;
          default:
             _mesa_problem(ctx,
                           "Unknown target in glGetQueryIndexediv(target = %s)",
@@ -771,6 +848,18 @@ _mesa_init_queryobj(struct gl_context *ctx)
    ctx->Const.QueryCounterBits.Timestamp = 64;
    ctx->Const.QueryCounterBits.PrimitivesGenerated = 64;
    ctx->Const.QueryCounterBits.PrimitivesWritten = 64;
+
+   ctx->Const.QueryCounterBits.VerticesSubmitted = 64;
+   ctx->Const.QueryCounterBits.PrimitivesSubmitted = 64;
+   ctx->Const.QueryCounterBits.VsInvocations = 64;
+   ctx->Const.QueryCounterBits.TessPatches = 64;
+   ctx->Const.QueryCounterBits.TessInvocations = 64;
+   ctx->Const.QueryCounterBits.GsInvocations = 64;
+   ctx->Const.QueryCounterBits.GsPrimitives = 64;
+   ctx->Const.QueryCounterBits.FsInvocations = 64;
+   ctx->Const.QueryCounterBits.ComputeInvocations = 64;
+   ctx->Const.QueryCounterBits.ClInPrimitives = 64;
+   ctx->Const.QueryCounterBits.ClOutPrimitives = 64;
 }