vbo: support for primitive restart

We handle splitting of glDrawArrays() calls into two primitives here
so that drivers don't have to worry about it.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
index 80ca1d866e7..1ef49174193 100644
--- a/src/mesa/vbo/vbo_exec_api.c
+++ b/src/mesa/vbo/vbo_exec_api.c
@@ -568,6 +568,28 @@ static void GLAPIENTRY vbo_exec_End( void )
 }
 
 
+/**
+ * Called via glPrimitiveRestartNV()
+ */
+static void GLAPIENTRY
+vbo_exec_PrimitiveRestartNV(void)
+{
+   GLenum curPrim;
+   GET_CURRENT_CONTEXT( ctx ); 
+
+   curPrim = ctx->Driver.CurrentExecPrimitive;
+
+   if (curPrim == PRIM_OUTSIDE_BEGIN_END) {
+      _mesa_error( ctx, GL_INVALID_OPERATION, "glPrimitiveRestartNV" );
+   }
+   else {
+      vbo_exec_End();
+      vbo_exec_Begin(curPrim);
+   }
+}
+
+
+
 static void vbo_exec_vtxfmt_init( struct vbo_exec_context *exec )
 {
    GLvertexformat *vfmt = &exec->vtxfmt;
@@ -576,6 +598,7 @@ static void vbo_exec_vtxfmt_init( struct vbo_exec_context *exec )
 
    vfmt->Begin = vbo_exec_Begin;
    vfmt->End = vbo_exec_End;
+   vfmt->PrimitiveRestartNV = vbo_exec_PrimitiveRestartNV;
 
    _MESA_INIT_DLIST_VTXFMT(vfmt, _mesa_);
    _MESA_INIT_EVAL_VTXFMT(vfmt, vbo_exec_);