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authorKeith Whitwell <keith@tungstengraphics.com>2001-02-04 00:44:36 +0000
committerKeith Whitwell <keith@tungstengraphics.com>2001-02-04 00:44:36 +0000
commit6e9f8b7cdbe5daf1767d192faef1cbe98ada1324 (patch)
treedc7b2e22295a837db83a74b5318eb94d4c4e5399 /src
parentfe69cb4b9bff800b6078ea7da5ea18bab05678d8 (diff)
Fast no-copy drawarrays for large tristrips
Diffstat (limited to 'src')
-rw-r--r--src/mesa/tnl/t_array_api.c96
1 files changed, 59 insertions, 37 deletions
diff --git a/src/mesa/tnl/t_array_api.c b/src/mesa/tnl/t_array_api.c
index b3ef1dbeed..0c61dee780 100644
--- a/src/mesa/tnl/t_array_api.c
+++ b/src/mesa/tnl/t_array_api.c
@@ -1,4 +1,4 @@
-/* $Id: t_array_api.c,v 1.4 2001/01/24 00:04:59 brianp Exp $ */
+/* $Id: t_array_api.c,v 1.5 2001/02/04 00:44:36 keithw Exp $ */
/*
* Mesa 3-D graphics library
@@ -45,7 +45,49 @@
#include "t_context.h"
#include "t_pipeline.h"
+static void fallback_drawarrays( GLcontext *ctx, GLenum mode, GLint start,
+ GLsizei count )
+{
+ /* Need to produce immediate structs, either for compiling or
+ * because the array range is too large to process in a single
+ * VB. In GL_EXECUTE mode, this introduces two redundant
+ * operations: producing the flag array and computing the orflag
+ * of the flag array.
+ */
+#if 1
+ if (_tnl_hard_begin( ctx, mode )) {
+ GLuint j;
+ for (j = 0 ; j < count ; ) {
+ struct immediate *IM = TNL_CURRENT_IM(ctx);
+ GLuint nr = MIN2( IMM_MAXDATA - IM->Start, count - j );
+ GLuint sf = IM->Flag[IM->Start];
+ _tnl_fill_immediate_drawarrays( ctx, IM, j, j+nr );
+
+ if (j == 0) IM->Flag[IM->Start] |= sf;
+
+ IM->Count = IM->Start + nr;
+ j += nr;
+
+ if (j == count)
+ _tnl_end( ctx );
+
+ _tnl_flush_immediate( IM );
+ }
+ }
+#else
+ /* Simple alternative to above code.
+ */
+ if (_tnl_hard_begin( ctx, mode ))
+ {
+ GLuint i;
+ for (i=start;i<count;i++) {
+ _tnl_array_element( ctx, i );
+ }
+ _tnl_end( ctx );
+ }
+#endif
+}
@@ -96,46 +138,26 @@ _tnl_DrawArrays(GLenum mode, GLint start, GLsizei count)
tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
}
}
- else {
- /* Need to produce immediate structs, either for compiling or
- * because the array range is too large to process in a single
- * VB. In GL_EXECUTE mode, this introduces two redundant
- * operations: producing the flag array and computing the orflag
- * of the flag array.
- */
-#if 1
- if (_tnl_hard_begin( ctx, mode )) {
- GLuint j;
- for (j = 0 ; j < count ; ) {
- struct immediate *IM = TNL_CURRENT_IM(ctx);
- GLuint nr = MIN2( IMM_MAXDATA - IM->Start, count - j );
- GLuint sf = IM->Flag[IM->Start];
+ else if (!ctx->CompileFlag && mode == GL_TRIANGLE_STRIP) {
+ int bufsz = (ctx->Const.MaxArrayLockSize - 2) & ~1;
+ int j, nr;
- _tnl_fill_immediate_drawarrays( ctx, IM, j, j+nr );
-
- if (j == 0) IM->Flag[IM->Start] |= sf;
-
- IM->Count = IM->Start + nr;
- j += nr;
-
- if (j == count)
- _tnl_end( ctx );
+ FLUSH_CURRENT( ctx, 0 );
- _tnl_flush_immediate( IM );
- }
- }
-#else
- /* Simple alternative to above code.
+ /* TODO: other non-fan primitives.
*/
- if (_tnl_hard_begin( ctx, mode ))
- {
- GLuint i;
- for (i=start;i<count;i++) {
- _tnl_array_element( ctx, i );
- }
- _tnl_end( ctx );
+ for (j = start ; j < count - 2; j += nr - 2 ) {
+ nr = MIN2( bufsz, count - j );
+ _tnl_vb_bind_arrays( ctx, j, j + nr );
+ VB->FirstPrimitive = 0;
+ VB->Primitive[0] = mode | PRIM_BEGIN | PRIM_END | PRIM_LAST;
+ VB->PrimitiveLength[0] = nr;
+ tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
+ _tnl_run_pipeline( ctx );
+ tnl->pipeline.run_input_changes |= ctx->Array._Enabled;
}
-#endif
+ } else {
+ fallback_drawarrays( ctx, mode, start, count );
}
}