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Fast no-copy drawarrays for large tristrips

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This commit is contained in:
Keith Whitwell 2001-02-04 00:44:36 +00:00
parent fe69cb4b9b
commit 6e9f8b7cdb
1 changed files with 61 additions and 39 deletions
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100
src/mesa/tnl/t_array_api.c
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@ -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.
else if (!ctx->CompileFlag && mode == GL_TRIANGLE_STRIP) {
int bufsz = (ctx->Const.MaxArrayLockSize - 2) & ~1;
int j, nr;
FLUSH_CURRENT( ctx, 0 );
/* TODO: other non-fan primitives.
*/
#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 );
}
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;
}
#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
} else {
fallback_drawarrays( ctx, mode, start, count );
}
}