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authorKeith Whitwell <keith@tungstengraphics.com>2005-01-05 18:14:38 +0000
committerKeith Whitwell <keith@tungstengraphics.com>2005-01-05 18:14:38 +0000
commit99fc261c47005b0674e2e45f5c6445bc2ce0d8e4 (patch)
treeb67bbf261fc7683359abda822a275e65b6bde2e1 /src
parentdd9666bc1def9e99a5050545ab71d24037cf5af0 (diff)
Improve some quad paths, gives gears a little boost.
Diffstat (limited to 'src')
-rw-r--r--src/mesa/tnl_dd/t_dd_dmatmp.h55
1 files changed, 39 insertions, 16 deletions
diff --git a/src/mesa/tnl_dd/t_dd_dmatmp.h b/src/mesa/tnl_dd/t_dd_dmatmp.h
index 3d5e496f15..6549041051 100644
--- a/src/mesa/tnl_dd/t_dd_dmatmp.h
+++ b/src/mesa/tnl_dd/t_dd_dmatmp.h
@@ -35,8 +35,6 @@
* Where various primitive types are unaccelerated by hardware, the
* code attempts to fallback to other primitive types (quadstrips to
* tristrips, lineloops to linestrips), or to indexed vertices.
- * Ultimately, a FALLBACK() macro is invoked if there is no way to
- * render the primitive natively.
*/
#if !defined(HAVE_TRIANGLES)
@@ -441,7 +439,9 @@ static void TAG(render_quad_strip_verts)( GLcontext *ctx,
FLUSH();
- } else if (HAVE_TRI_STRIPS && (ctx->_TriangleCaps & DD_FLATSHADE)) {
+ } else if (HAVE_TRI_STRIPS &&
+ (ctx->_TriangleCaps & DD_FLATSHADE) &&
+ TNL_CONTEXT(ctx)->vb.ColorPtr[0]->stride) {
if (HAVE_ELTS) {
LOCAL_VARS;
int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
@@ -491,8 +491,8 @@ static void TAG(render_quad_strip_verts)( GLcontext *ctx,
FLUSH();
}
else {
- /* Vertices won't fit in a single buffer or elts not available,
- * VERT_FALLBACK.
+ /* Vertices won't fit in a single buffer or elts not
+ * available - should never happen.
*/
fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__);
return;
@@ -561,9 +561,8 @@ static void TAG(render_quads_verts)( GLcontext *ctx,
TAG(emit_verts)( ctx, j, nr, ALLOC_VERTS(nr) );
currentsz = dmasz;
}
-
-
- } else if (HAVE_ELTS) {
+ }
+ else if (HAVE_ELTS) {
/* Hardware doesn't have a quad primitive type -- try to
* simulate it using indexed vertices and the triangle
* primitive:
@@ -614,8 +613,29 @@ static void TAG(render_quads_verts)( GLcontext *ctx,
RELEASE_ELT_VERTS();
}
+ else if (HAVE_TRIANGLES) {
+ /* Hardware doesn't have a quad primitive type -- try to
+ * simulate it using triangle primitive. This is a win for
+ * gears, but is it useful in the broader world?
+ */
+ LOCAL_VARS;
+ GLuint j;
+
+ INIT(GL_TRIANGLES);
+
+ for (j = start; j < count; j += 4) {
+ void *tmp = ALLOC_VERTS( 6 );
+ /* Send v0, v1, v3
+ */
+ tmp = EMIT_VERTS(ctx, j, 2, tmp);
+ tmp = EMIT_VERTS(ctx, j + 3, 1, tmp);
+ /* Send v1, v2, v3
+ */
+ tmp = EMIT_VERTS(ctx, j + 1, 3, tmp);
+ }
+ }
else {
- /* Vertices won't fit in a single buffer, fallback.
+ /* Vertices won't fit in a single buffer, should never happen.
*/
fprintf(stderr, "%s - cannot draw primitive\n", __FUNCTION__);
return;
@@ -1139,10 +1159,8 @@ static tnl_render_func TAG(render_tab_elts)[GL_POLYGON+2] =
-
-
-
-/* Prevent fallbacks later on.
+/* Pre-check the primitives in the VB to prevent the need for
+ * fallbacks later on.
*/
static GLboolean TAG(validate_render)( GLcontext *ctx,
struct vertex_buffer *VB )
@@ -1198,7 +1216,9 @@ static GLboolean TAG(validate_render)( GLcontext *ctx,
}
else if (HAVE_QUAD_STRIPS) {
ok = GL_TRUE;
- } else if (HAVE_TRI_STRIPS && (ctx->_TriangleCaps & DD_FLATSHADE)) {
+ } else if (HAVE_TRI_STRIPS &&
+ (ctx->_TriangleCaps & DD_FLATSHADE) &&
+ VB->ColorPtr[0]->stride != 0) {
if (HAVE_ELTS) {
ok = (GLint) count < GET_SUBSEQUENT_VB_MAX_ELTS();
}
@@ -1216,14 +1236,17 @@ static GLboolean TAG(validate_render)( GLcontext *ctx,
ok = (GLint) count < GET_SUBSEQUENT_VB_MAX_ELTS();
}
else {
- ok = GL_FALSE;
+ ok = HAVE_TRIANGLES; /* for gears... */
}
break;
default:
break;
}
- if (!ok) return GL_FALSE;
+ if (!ok) {
+/* fprintf(stderr, "not ok %s\n", _mesa_lookup_enum_by_nr(prim & PRIM_MODE_MASK)); */
+ return GL_FALSE;
+ }
}
return GL_TRUE;