mesa: add tessellation shader getters (v3)

Tessellation dependencies added by Marek.

v2: require tessellation in addition to atomics/images for some glGet queries

Reviewed-by: Kenneth Graunke <[email protected]>

3 files changed, 135 insertions, 0 deletions

diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index ffafe51ba05..590fe284f4e 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -149,6 +149,8 @@ enum value_extra {
    EXTRA_EXT_UBO_GS4,
    EXTRA_EXT_ATOMICS_GS4,
    EXTRA_EXT_SHADER_IMAGE_GS4,
+   EXTRA_EXT_ATOMICS_TESS,
+   EXTRA_EXT_SHADER_IMAGE_TESS,
 };
 
 #define NO_EXTRA NULL
@@ -349,6 +351,16 @@ static const int extra_ARB_shader_image_load_store_and_geometry_shader[] = {
    EXTRA_END
 };
 
+static const int extra_ARB_shader_atomic_counters_and_tessellation[] = {
+   EXTRA_EXT_ATOMICS_TESS,
+   EXTRA_END
+};
+
+static const int extra_ARB_shader_image_load_store_and_tessellation[] = {
+   EXTRA_EXT_SHADER_IMAGE_TESS,
+   EXTRA_END
+};
+
 static const int extra_ARB_draw_indirect_es31[] = {
    EXT(ARB_draw_indirect),
    EXTRA_API_ES31,
@@ -401,6 +413,7 @@ EXTRA_EXT(ARB_explicit_uniform_location);
 EXTRA_EXT(ARB_clip_control);
 EXTRA_EXT(EXT_polygon_offset_clamp);
 EXTRA_EXT(ARB_framebuffer_no_attachments);
+EXTRA_EXT(ARB_tessellation_shader);
 
 static const int
 extra_ARB_color_buffer_float_or_glcore[] = {
@@ -1149,6 +1162,16 @@ check_extra(struct gl_context *ctx, const char *func, const struct value_desc *d
          api_found = (ctx->Extensions.ARB_shader_image_load_store &&
                       _mesa_has_geometry_shaders(ctx));
          break;
+      case EXTRA_EXT_ATOMICS_TESS:
+         api_check = GL_TRUE;
+         api_found = ctx->Extensions.ARB_shader_atomic_counters &&
+                     _mesa_has_tessellation(ctx);
+         break;
+      case EXTRA_EXT_SHADER_IMAGE_TESS:
+         api_check = GL_TRUE;
+         api_found = ctx->Extensions.ARB_shader_image_load_store &&
+                     _mesa_has_tessellation(ctx);
+         break;
       case EXTRA_END:
 	 break;
       default: /* *e is a offset into the extension struct */
diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py
index c25e1b6555f..2cf06d64c9f 100644
--- a/src/mesa/main/get_hash_params.py
+++ b/src/mesa/main/get_hash_params.py
@@ -824,6 +824,34 @@ descriptor=[
   [ "MIN_FRAGMENT_INTERPOLATION_OFFSET", "CONTEXT_FLOAT(Const.MinFragmentInterpolationOffset), extra_ARB_gpu_shader5" ],
   [ "MAX_FRAGMENT_INTERPOLATION_OFFSET", "CONTEXT_FLOAT(Const.MaxFragmentInterpolationOffset), extra_ARB_gpu_shader5" ],
   [ "FRAGMENT_INTERPOLATION_OFFSET_BITS", "CONST(FRAGMENT_INTERPOLATION_OFFSET_BITS), extra_ARB_gpu_shader5" ],
+
+# GL_ARB_tessellation_shader
+  [ "PATCH_VERTICES", "CONTEXT_INT(TessCtrlProgram.patch_vertices), extra_ARB_tessellation_shader" ],
+  [ "PATCH_DEFAULT_OUTER_LEVEL", "CONTEXT_FLOAT4(TessCtrlProgram.patch_default_outer_level), extra_ARB_tessellation_shader" ],
+  [ "PATCH_DEFAULT_INNER_LEVEL", "CONTEXT_FLOAT2(TessCtrlProgram.patch_default_inner_level), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_GEN_LEVEL", "CONTEXT_INT(Const.MaxTessGenLevel), extra_ARB_tessellation_shader" ],
+  [ "MAX_PATCH_VERTICES", "CONTEXT_INT(Const.MaxPatchVertices), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_CONTROL_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_EVALUATION_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_CONTROL_OUTPUT_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_PATCH_COMPONENTS", "CONTEXT_INT(Const.MaxTessPatchComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS", "CONTEXT_INT(Const.MaxTessControlTotalOutputComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_EVALUATION_OUTPUT_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_CONTROL_INPUT_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_EVALUATION_INPUT_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_CONTROL_UNIFORM_BLOCKS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformBlocks), extra_ARB_tessellation_shader" ],
+  [ "MAX_TESS_EVALUATION_UNIFORM_BLOCKS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks), extra_ARB_tessellation_shader" ],
+  [ "MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxCombinedUniformComponents), extra_ARB_tessellation_shader" ],
+  [ "MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxCombinedUniformComponents), extra_ARB_tessellation_shader" ],
+# Dependencies on GL_ARB_tessellation_shader
+  [ "MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers), extra_ARB_shader_atomic_counters_and_tessellation" ],
+  [ "MAX_TESS_CONTROL_ATOMIC_COUNTERS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters), extra_ARB_shader_atomic_counters_and_tessellation" ],
+  [ "MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers), extra_ARB_shader_atomic_counters_and_tessellation" ],
+  [ "MAX_TESS_EVALUATION_ATOMIC_COUNTERS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters), extra_ARB_shader_atomic_counters_and_tessellation" ],
+  [ "MAX_TESS_CONTROL_IMAGE_UNIFORMS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms), extra_ARB_shader_image_load_store_and_tessellation"],
+  [ "MAX_TESS_EVALUATION_IMAGE_UNIFORMS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms), extra_ARB_shader_image_load_store_and_tessellation"],
 ]}
 
 ]
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 2a40eea1d41..a074a444d67 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -518,6 +518,57 @@ check_gs_query(struct gl_context *ctx, const struct gl_shader_program *shProg)
 
 
 /**
+ * Check if a tessellation control shader query is valid at this time.
+ * If not, report an error and return false.
+ *
+ * From GL 4.0 section 6.1.12 (Shader and Program Queries):
+ *
+ *     "If TESS_CONTROL_OUTPUT_VERTICES is queried for a program which has
+ *     not been linked successfully, or which does not contain objects to
+ *     form a tessellation control shader, then an INVALID_OPERATION error is
+ *     generated."
+ */
+static bool
+check_tcs_query(struct gl_context *ctx, const struct gl_shader_program *shProg)
+{
+   if (shProg->LinkStatus &&
+       shProg->_LinkedShaders[MESA_SHADER_TESS_CTRL] != NULL) {
+      return true;
+   }
+
+   _mesa_error(ctx, GL_INVALID_OPERATION,
+               "glGetProgramv(linked tessellation control shader required)");
+   return false;
+}
+
+
+/**
+ * Check if a tessellation evaluation shader query is valid at this time.
+ * If not, report an error and return false.
+ *
+ * From GL 4.0 section 6.1.12 (Shader and Program Queries):
+ *
+ *     "If any of the pname values in this paragraph are queried for a program
+ *     which has not been linked successfully, or which does not contain
+ *     objects to form a tessellation evaluation shader, then an
+ *     INVALID_OPERATION error is generated."
+ *
+ */
+static bool
+check_tes_query(struct gl_context *ctx, const struct gl_shader_program *shProg)
+{
+   if (shProg->LinkStatus &&
+       shProg->_LinkedShaders[MESA_SHADER_TESS_EVAL] != NULL) {
+      return true;
+   }
+
+   _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramv(linked tessellation "
+               "evaluation shader required)");
+   return false;
+}
+
+
+/**
  * glGetProgramiv() - get shader program state.
  * Note that this is for GLSL shader programs, not ARB vertex/fragment
  * programs (see glGetProgramivARB).
@@ -540,6 +591,7 @@ get_programiv(struct gl_context *ctx, GLuint program, GLenum pname,
     * and GL 3.2) are available in this context
     */
    const bool has_core_gs = _mesa_has_geometry_shaders(ctx);
+   const bool has_tess = _mesa_has_tessellation(ctx);
 
    /* Are uniform buffer objects available in this context?
     */
@@ -718,6 +770,38 @@ get_programiv(struct gl_context *ctx, GLuint program, GLenum pname,
    case GL_PROGRAM_SEPARABLE:
       *params = shProg->SeparateShader;
       return;
+
+   /* ARB_tessellation_shader */
+   case GL_TESS_CONTROL_OUTPUT_VERTICES:
+      if (!has_tess)
+         break;
+      if (check_tcs_query(ctx, shProg))
+         *params = shProg->TessCtrl.VerticesOut;
+      return;
+   case GL_TESS_GEN_MODE:
+      if (!has_tess)
+         break;
+      if (check_tes_query(ctx, shProg))
+         *params = shProg->TessEval.PrimitiveMode;
+      return;
+   case GL_TESS_GEN_SPACING:
+      if (!has_tess)
+         break;
+      if (check_tes_query(ctx, shProg))
+         *params = shProg->TessEval.Spacing;
+      return;
+   case GL_TESS_GEN_VERTEX_ORDER:
+      if (!has_tess)
+         break;
+      if (check_tes_query(ctx, shProg))
+         *params = shProg->TessEval.VertexOrder;
+      return;
+   case GL_TESS_GEN_POINT_MODE:
+      if (!has_tess)
+         break;
+      if (check_tes_query(ctx, shProg))
+         *params = shProg->TessEval.PointMode;
+      return;
    default:
       break;
    }