mesa: Add support for ARB_draw_elements_base_vertex.

1 files changed, 113 insertions, 18 deletions

diff --git a/src/mesa/vbo/vbo_exec_array.c b/src/mesa/vbo/vbo_exec_array.c
index 12911f5750c..b9550d6106c 100644
--- a/src/mesa/vbo/vbo_exec_array.c
+++ b/src/mesa/vbo/vbo_exec_array.c
@@ -181,7 +181,7 @@ unmap_array_buffer(GLcontext *ctx, struct gl_client_array *array)
  */
 static void
 check_draw_elements_data(GLcontext *ctx, GLsizei count, GLenum elemType,
-                         const void *elements)
+                         const void *elements, GLint basevertex)
 {
    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
    const void *elemMap;
@@ -518,6 +518,7 @@ vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
    prim[0].start = start;
    prim[0].count = count;
    prim[0].indexed = 0;
+   prim[0].basevertex = 0;
 
    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL,
                     GL_TRUE, start, start + count - 1 );
@@ -592,7 +593,8 @@ vbo_validated_drawrangeelements(GLcontext *ctx, GLenum mode,
 				GLboolean index_bounds_valid,
 				GLuint start, GLuint end,
 				GLsizei count, GLenum type,
-				const GLvoid *indices)
+				const GLvoid *indices,
+				GLint basevertex)
 {
    struct vbo_context *vbo = vbo_context(ctx);
    struct vbo_exec_context *exec = &vbo->exec;
@@ -626,6 +628,7 @@ vbo_validated_drawrangeelements(GLcontext *ctx, GLenum mode,
    prim[0].start = 0;
    prim[0].count = count;
    prim[0].indexed = 1;
+   prim[0].basevertex = basevertex;
 
    /* Need to give special consideration to rendering a range of
     * indices starting somewhere above zero.  Typically the
@@ -663,23 +666,25 @@ vbo_validated_drawrangeelements(GLcontext *ctx, GLenum mode,
 }
 
 static void GLAPIENTRY
-vbo_exec_DrawRangeElements(GLenum mode,
-			   GLuint start, GLuint end,
-			   GLsizei count, GLenum type, const GLvoid *indices)
+vbo_exec_DrawRangeElementsBaseVertex(GLenum mode,
+				     GLuint start, GLuint end,
+				     GLsizei count, GLenum type,
+				     const GLvoid *indices,
+				     GLint basevertex)
 {
    GET_CURRENT_CONTEXT(ctx);
 
    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
-                                          type, indices ))
+                                          type, indices, basevertex ))
       return;
 
    if (end >= ctx->Array.ArrayObj->_MaxElement) {
       /* the max element is out of bounds of one or more enabled arrays */
-      _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, count %d, "
-                    "type 0x%x, indices=%p)\n"
+      _mesa_warning(ctx, "glDraw[Range]Elements{,BaseVertex}(start %u, end %u, "
+		    "count %d, type 0x%x, indices=%p, base=%d)\n"
                     "\tindex=%u is out of bounds (max=%u)  "
                     "Element Buffer %u (size %d)",
-                    start, end, count, type, indices, end,
+                    start, end, count, type, indices, end, basevertex,
                     ctx->Array.ArrayObj->_MaxElement - 1,
                     ctx->Array.ElementArrayBufferObj->Name,
                     ctx->Array.ElementArrayBufferObj->Size);
@@ -692,10 +697,12 @@ vbo_exec_DrawRangeElements(GLenum mode,
       return;
    }
    else if (0) {
-      _mesa_printf("glDraw[Range]Elements"
-                   "(start %u, end %u, type 0x%x, count %d) ElemBuf %u\n",
+      _mesa_printf("glDraw[Range]Elements{,BaseVertex}"
+                   "(start %u, end %u, type 0x%x, count %d) ElemBuf %u, "
+		   "base %d\n",
                    start, end, type, count,
-                   ctx->Array.ElementArrayBufferObj->Name);
+                   ctx->Array.ElementArrayBufferObj->Name,
+		   basevertex);
    }
 
 #if 0
@@ -705,7 +712,17 @@ vbo_exec_DrawRangeElements(GLenum mode,
 #endif
 
    vbo_validated_drawrangeelements(ctx, mode, GL_TRUE, start, end,
-				   count, type, indices);
+				   count, type, indices, basevertex);
+}
+
+static void GLAPIENTRY
+vbo_exec_DrawRangeElements(GLenum mode,
+				     GLuint start, GLuint end,
+				     GLsizei count, GLenum type,
+				     const GLvoid *indices)
+{
+   vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
+					indices, 0);
 }
 
 
@@ -715,18 +732,33 @@ vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type,
 {
    GET_CURRENT_CONTEXT(ctx);
 
-   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
+   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices, 0 ))
+      return;
+
+   vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
+				   count, type, indices, 0);
+}
+
+static void GLAPIENTRY
+vbo_exec_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
+				const GLvoid *indices, GLint basevertex)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices,
+				     basevertex ))
       return;
 
    vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
-				   count, type, indices);
+				   count, type, indices, basevertex);
 }
 
 /* Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements */
 static void
 vbo_validated_multidrawelements(GLcontext *ctx, GLenum mode,
 				const GLsizei *count, GLenum type,
-				const GLvoid **indices, GLsizei primcount)
+				const GLvoid **indices, GLsizei primcount,
+				const GLint *basevertex)
 {
    struct vbo_context *vbo = vbo_context(ctx);
    struct vbo_exec_context *exec = &vbo->exec;
@@ -820,6 +852,10 @@ vbo_validated_multidrawelements(GLcontext *ctx, GLenum mode,
 	 prim[i].start = ((uintptr_t)indices[i] - min_index_ptr) / index_type_size;
 	 prim[i].count = count[i];
 	 prim[i].indexed = 1;
+	 if (basevertex != NULL)
+	    prim[i].basevertex = basevertex[i];
+	 else
+	    prim[i].basevertex = 0;
       }
 
       vbo->draw_prims(ctx, exec->array.inputs, prim, primcount, &ib,
@@ -840,6 +876,10 @@ vbo_validated_multidrawelements(GLcontext *ctx, GLenum mode,
 	 prim[0].start = 0;
 	 prim[0].count = count[i];
 	 prim[0].indexed = 1;
+	 if (basevertex != NULL)
+	    prim[0].basevertex = basevertex[i];
+	 else
+	    prim[0].basevertex = 0;
       }
 
       vbo->draw_prims(ctx, exec->array.inputs, prim, 1, &ib,
@@ -860,13 +900,36 @@ vbo_exec_MultiDrawElements(GLenum mode,
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    for (i = 0; i < primcount; i++) {
-      if (!_mesa_validate_DrawElements( ctx, mode, count[i], type, indices[i] ))
+      if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],
+				       0))
 	 return;
    }
 
-   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount);
+   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
+				   NULL);
 }
 
+static void GLAPIENTRY
+vbo_exec_MultiDrawElementsBaseVertex(GLenum mode,
+				     const GLsizei *count, GLenum type,
+				     const GLvoid **indices,
+				     GLsizei primcount,
+				     const GLsizei *basevertex)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint i;
+
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   for (i = 0; i < primcount; i++) {
+      if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],
+				       basevertex[i]))
+	 return;
+   }
+
+   vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
+				   basevertex);
+}
 
 
 /***********************************************************************
@@ -881,11 +944,17 @@ vbo_exec_array_init( struct vbo_exec_context *exec )
    exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
    exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
    exec->vtxfmt.MultiDrawElementsEXT = vbo_exec_MultiDrawElements;
+   exec->vtxfmt.DrawElementsBaseVertex = vbo_exec_DrawElementsBaseVertex;
+   exec->vtxfmt.DrawRangeElementsBaseVertex = vbo_exec_DrawRangeElementsBaseVertex;
+   exec->vtxfmt.MultiDrawElementsBaseVertex = vbo_exec_MultiDrawElementsBaseVertex;
 #else
    exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
    exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
    exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
    exec->vtxfmt.MultiDrawElementsEXT = _mesa_noop_MultiDrawElements;
+   exec->vtxfmt.DrawElementsBaseVertex = _mesa_noop_DrawElementsBaseVertex;
+   exec->vtxfmt.DrawRangeElementsBaseVertex = _mesa_noop_DrawRangeElementsBaseVertex;
+   exec->vtxfmt.MultiDrawElementsBaseVertex = _mesa_noop_MultiDrawElementsBaseVertex;
 #endif
 }
 
@@ -913,6 +982,13 @@ _mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
    vbo_exec_DrawElements(mode, count, type, indices);
 }
 
+void GLAPIENTRY
+_mesa_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
+			     const GLvoid *indices, GLint basevertex)
+{
+   vbo_exec_DrawElementsBaseVertex(mode, count, type, indices, basevertex);
+}
+
 
 /* This API entrypoint is not ordinarily used */
 void GLAPIENTRY
@@ -922,6 +998,15 @@ _mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
    vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
 }
 
+void GLAPIENTRY
+_mesa_DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end,
+				  GLsizei count, GLenum type,
+				  const GLvoid *indices, GLint basevertex)
+{
+   vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
+					indices, basevertex);
+}
+
 /* GL_EXT_multi_draw_arrays */
 void GLAPIENTRY
 _mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type,
@@ -929,3 +1014,13 @@ _mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type,
 {
    vbo_exec_MultiDrawElements(mode, count, type, indices, primcount);
 }
+
+void GLAPIENTRY
+_mesa_MultiDrawElementsBaseVertex(GLenum mode,
+				  const GLsizei *count, GLenum type,
+				  const GLvoid **indices, GLsizei primcount,
+				  const GLint *basevertex)
+{
+   vbo_exec_MultiDrawElementsBaseVertex(mode, count, type, indices,
+					primcount, basevertex);
+}