mesa: add EXT_dsa indexed texture commands functions

Added functions:
  - EnableClientStateIndexedEXT
  - DisableClientStateIndexedEXT
  - EnableClientStateiEXT
  - DisableClientStateiEXT

Implemented using the idiom provided by the spec:

        if (array == TEXTURE_COORD_ARRAY) {
          int savedClientActiveTexture;

          GetIntegerv(CLIENT_ACTIVE_TEXTURE, &savedClientActiveTexture);
          ClientActiveTexture(TEXTURE0+index);
          XXX(array);
          ClientActiveTexture(savedActiveTexture);
        } else {
          // Invalid enum
        }

3 files changed, 54 insertions, 2 deletions

diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index ffdd3d8783a..418fc75c724 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -133,6 +133,38 @@ invalid_enum_error:
 }
 
 
+/* Helper for GL_EXT_direct_state_access following functions:
+ *   - EnableClientStateIndexedEXT
+ *   - EnableClientStateiEXT
+ *   - DisableClientStateIndexedEXT
+ *   - DisableClientStateiEXT
+ */
+static void
+client_state_i(struct gl_context *ctx, GLenum cap, GLuint index, GLboolean state)
+{
+   int saved_active;
+
+   if (cap != GL_TEXTURE_COORD_ARRAY) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "gl%sClientStateiEXT(cap=%s)",
+         state ? "Enable" : "Disable",
+         _mesa_enum_to_string(cap));
+      return;
+   }
+
+   if (index >= ctx->Const.MaxTextureCoordUnits) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "gl%sClientStateiEXT(index=%d)",
+         state ? "Enable" : "Disable",
+         index);
+      return;
+   }
+
+   saved_active = ctx->Array.ActiveTexture;
+   _mesa_ClientActiveTexture(GL_TEXTURE0 + index);
+   client_state(ctx, cap, state);
+   _mesa_ClientActiveTexture(GL_TEXTURE0 + saved_active);
+}
+
+
 /**
  * Enable GL capability.
  * \param cap  state to enable/disable.
@@ -148,6 +180,14 @@ _mesa_EnableClientState( GLenum cap )
 }
 
 
+void GLAPIENTRY
+_mesa_EnableClientStateiEXT( GLenum cap, GLuint index )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   client_state_i(ctx, cap, index, GL_TRUE);
+}
+
+
 /**
  * Disable GL capability.
  * \param cap  state to enable/disable.
@@ -162,6 +202,12 @@ _mesa_DisableClientState( GLenum cap )
    client_state( ctx, cap, GL_FALSE );
 }
 
+void GLAPIENTRY
+_mesa_DisableClientStateiEXT( GLenum cap, GLuint index )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   client_state_i(ctx, cap, index, GL_FALSE);
+}
 
 #define CHECK_EXTENSION(EXTNAME)					\
    if (!ctx->Extensions.EXTNAME) {					\
diff --git a/src/mesa/main/enable.h b/src/mesa/main/enable.h
index 10755e549d3..fa569edadd2 100644
--- a/src/mesa/main/enable.h
+++ b/src/mesa/main/enable.h
@@ -65,8 +65,14 @@ extern void GLAPIENTRY
 _mesa_EnableClientState( GLenum cap );
 
 extern void GLAPIENTRY
+_mesa_EnableClientStateiEXT( GLenum cap, GLuint index );
+
+extern void GLAPIENTRY
 _mesa_DisableClientState( GLenum cap );
 
+extern void GLAPIENTRY
+_mesa_DisableClientStateiEXT( GLenum cap, GLuint index );
+
 extern void
 _mesa_set_multisample(struct gl_context *ctx, GLboolean state);
 
diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
index 3e0e273dd04..cecca5e0aa9 100644
--- a/src/mesa/main/tests/dispatch_sanity.cpp
+++ b/src/mesa/main/tests/dispatch_sanity.cpp
@@ -1092,8 +1092,8 @@ const struct function common_desktop_functions_possible[] = {
    //{ "glMultiTexImage3DEXT", 12, -1 },
    //{ "glMultiTexSubImage3DEXT", 12, -1 },
    //{ "glCopyMultiTexSubImage3DEXT", 12, -1 },
-   //{ "glEnableClientStateIndexedEXT", 12, -1 },
-   //{ "glDisableClientStateIndexedEXT", 12, -1 },
+   { "glEnableClientStateIndexedEXT", 12, -1 },
+   { "glDisableClientStateIndexedEXT", 12, -1 },
    //{ "glGetPointerIndexedvEXT", 12, -1 },
    /* GL_EXT_direct_state_access - ARB_vertex_program */
    //{ "glNamedProgramStringEXT", 10, -1 },