[Mesa-dev] [RFC PATCH 12/56] mesa: Add tessellation shader builtin varyings.

[Chris Forbes]

From: Fabian Bieler <fabianbieler at fastmail.fm>

---
 src/mesa/main/mtypes.h        | 15 ++++++++++++++-
 src/mesa/program/prog_print.c |  4 ++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 9e989d7..9088e97 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -239,6 +239,8 @@ typedef enum
    VARYING_SLOT_VIEWPORT, /* Appears as VS or GS output */
    VARYING_SLOT_FACE, /* FS only */
    VARYING_SLOT_PNTC, /* FS only */
+   VARYING_SLOT_TESS_LEVEL_OUTER, /* Appears in both tessellation shaders. */
+   VARYING_SLOT_TESS_LEVEL_INNER, /* Appears in both tessellation shaders. */
    VARYING_SLOT_VAR0, /* First generic varying slot */
    VARYING_SLOT_MAX = VARYING_SLOT_VAR0 + MAX_VARYING
 } gl_varying_slot;
@@ -275,6 +277,8 @@ typedef enum
 #define VARYING_BIT_VIEWPORT BITFIELD64_BIT(VARYING_SLOT_VIEWPORT)
 #define VARYING_BIT_FACE BITFIELD64_BIT(VARYING_SLOT_FACE)
 #define VARYING_BIT_PNTC BITFIELD64_BIT(VARYING_SLOT_PNTC)
+#define VARYING_BIT_TESS_LEVEL_OUTER BITFIELD64_BIT(VARYING_SLOT_TESS_LEVEL_OUTER)
+#define VARYING_BIT_TESS_LEVEL_INNER BITFIELD64_BIT(VARYING_SLOT_TESS_LEVEL_INNER)
 #define VARYING_BIT_VAR(V) BITFIELD64_BIT(VARYING_SLOT_VAR0 + (V))
 /*@}*/
 
@@ -298,6 +302,8 @@ _mesa_varying_slot_in_fs(gl_varying_slot slot)
    case VARYING_SLOT_EDGE:
    case VARYING_SLOT_CLIP_VERTEX:
    case VARYING_SLOT_LAYER:
+   case VARYING_SLOT_TESS_LEVEL_OUTER:
+   case VARYING_SLOT_TESS_LEVEL_INNER:
       return GL_FALSE;
    default:
       return GL_TRUE;
@@ -2140,7 +2146,7 @@ typedef enum
     * \name Geometry shader system values
     */
    /*@{*/
-   SYSTEM_VALUE_INVOCATION_ID,
+   SYSTEM_VALUE_INVOCATION_ID,  /**< (Also in Tessellation Control shader) */
    /*@}*/
 
    /**
@@ -2153,6 +2159,13 @@ typedef enum
    SYSTEM_VALUE_SAMPLE_MASK_IN,
    /*@}*/
 
+   /**
+    * \name Tessellation Evaluation shader system values
+    */
+   /*@{*/
+   SYSTEM_VALUE_TESS_COORD,
+   /*@}*/
+
    SYSTEM_VALUE_MAX             /**< Number of values */
 } gl_system_value;
 
diff --git a/src/mesa/program/prog_print.c b/src/mesa/program/prog_print.c
index 475e241..26881e8 100644
--- a/src/mesa/program/prog_print.c
+++ b/src/mesa/program/prog_print.c
@@ -147,6 +147,8 @@ arb_input_attrib_string(GLint index, GLenum progType)
       "fragment.(twenty-one)", /* VARYING_SLOT_VIEWPORT */
       "fragment.(twenty-two)", /* VARYING_SLOT_FACE */
       "fragment.(twenty-three)", /* VARYING_SLOT_PNTC */
+      "fragment.(twenty-four)", /* VARYING_SLOT_TESS_LEVEL_OUTER */
+      "fragment.(twenty-five)", /* VARYING_SLOT_TESS_LEVEL_INNER */
       "fragment.varying[0]",
       "fragment.varying[1]",
       "fragment.varying[2]",
@@ -272,6 +274,8 @@ arb_output_attrib_string(GLint index, GLenum progType)
       "result.(twenty-one)", /* VARYING_SLOT_VIEWPORT */
       "result.(twenty-two)", /* VARYING_SLOT_FACE */
       "result.(twenty-three)", /* VARYING_SLOT_PNTC */
+      "result.(twenty-four)", /* VARYING_SLOT_TESS_LEVEL_OUTER */
+      "result.(twenty-five)", /* VARYING_SLOT_TESS_LEVEL_INNER */
       "result.varying[0]",
       "result.varying[1]",
       "result.varying[2]",
-- 
2.1.0