+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
- */
-
-
-#ifndef POSTFIX
-#define POSTFIX
-#endif
-
-#ifndef INIT
-#define INIT(x)
-#endif
-
-#ifndef NEED_EDGEFLAG_SETUP
-#define NEED_EDGEFLAG_SETUP 0
-#define EDGEFLAG_GET(a) 0
-#define EDGEFLAG_SET(a,b) (void)b
-#endif
-
-#ifndef RESET_STIPPLE
-#define RESET_STIPPLE
-#endif
-
-#ifndef RESET_OCCLUSION
-#define RESET_OCCLUSION
-#endif
-
-#ifndef TEST_PRIM_END
-#define TEST_PRIM_END(flags) (flags & PRIM_END)
-#define TEST_PRIM_BEGIN(flags) (flags & PRIM_BEGIN)
-#define TEST_PRIM_PARITY(flags) (flags & PRIM_PARITY)
-#endif
-
-#ifndef ELT
-#define ELT(x) x
-#endif
-
-#ifndef RENDER_TAB_QUALIFIER
-#define RENDER_TAB_QUALIFIER static
-#endif
-
-static void TAG(render_points)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- LOCAL_VARS;
- (void) flags;
-
- RESET_OCCLUSION;
- INIT(GL_POINTS);
- RENDER_POINTS( start, count );
- POSTFIX;
-}
-
-static void TAG(render_lines)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- LOCAL_VARS;
- (void) flags;
-
- RESET_OCCLUSION;
- INIT(GL_LINES);
- for (j=start+1; j<count; j+=2 ) {
- RENDER_LINE( ELT(j-1), ELT(j) );
- RESET_STIPPLE;
- }
- POSTFIX;
-}
-
-
-static void TAG(render_line_strip)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- LOCAL_VARS;
- (void) flags;
-
- RESET_OCCLUSION;
- INIT(GL_LINE_STRIP);
-
- for (j=start+1; j<count; j++ )
- RENDER_LINE( ELT(j-1), ELT(j) );
-
- if (TEST_PRIM_END(flags))
- RESET_STIPPLE;
-
- POSTFIX;
-}
-
-
-static void TAG(render_line_loop)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint i;
- LOCAL_VARS;
-
- (void) flags;
-
- RESET_OCCLUSION;
- INIT(GL_LINE_LOOP);
-
- if (start+1 < count) {
- if (TEST_PRIM_BEGIN(flags)) {
- RENDER_LINE( ELT(start), ELT(start+1) );
- }
-
- for ( i = start+2 ; i < count ; i++) {
- RENDER_LINE( ELT(i-1), ELT(i) );
- }
-
- if ( TEST_PRIM_END(flags)) {
- RENDER_LINE( ELT(count-1), ELT(start) );
- RESET_STIPPLE;
- }
- }
-
- POSTFIX;
-}
-
-
-static void TAG(render_triangles)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- LOCAL_VARS;
- (void) flags;
-
- INIT(GL_TRIANGLES);
- if (NEED_EDGEFLAG_SETUP) {
- for (j=start+2; j<count; j+=3) {
- /* Leave the edgeflags as supplied by the user.
- */
- RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) );
- RESET_STIPPLE;
- }
- } else {
- for (j=start+2; j<count; j+=3) {
- RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) );
- }
- }
- POSTFIX;
-}
-
-
-
-static void TAG(render_tri_strip)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- GLuint parity = 0;
- LOCAL_VARS;
-
- INIT(GL_TRIANGLE_STRIP);
- if (NEED_EDGEFLAG_SETUP) {
- for (j=start+2;j<count;j++,parity^=1) {
- GLuint ej2 = ELT(j-2+parity);
- GLuint ej1 = ELT(j-1-parity);
- GLuint ej = ELT(j);
- GLboolean ef2 = EDGEFLAG_GET( ej2 );
- GLboolean ef1 = EDGEFLAG_GET( ej1 );
- GLboolean ef = EDGEFLAG_GET( ej );
- EDGEFLAG_SET( ej2, GL_TRUE );
- EDGEFLAG_SET( ej1, GL_TRUE );
- EDGEFLAG_SET( ej, GL_TRUE );
- RENDER_TRI( ej2, ej1, ej );
- EDGEFLAG_SET( ej2, ef2 );
- EDGEFLAG_SET( ej1, ef1 );
- EDGEFLAG_SET( ej, ef );
- RESET_STIPPLE;
- }
- } else {
- for (j=start+2; j<count ; j++, parity^=1) {
- RENDER_TRI( ELT(j-2+parity), ELT(j-1-parity), ELT(j) );
- }
- }
- POSTFIX;
-}
-
-
-static void TAG(render_tri_fan)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- LOCAL_VARS;
- (void) flags;
-
- INIT(GL_TRIANGLE_FAN);
- if (NEED_EDGEFLAG_SETUP) {
- for (j=start+2;j<count;j++) {
- /* For trifans, all edges are boundary.
- */
- GLuint ejs = ELT(start);
- GLuint ej1 = ELT(j-1);
- GLuint ej = ELT(j);
- GLboolean efs = EDGEFLAG_GET( ejs );
- GLboolean ef1 = EDGEFLAG_GET( ej1 );
- GLboolean ef = EDGEFLAG_GET( ej );
- EDGEFLAG_SET( ejs, GL_TRUE );
- EDGEFLAG_SET( ej1, GL_TRUE );
- EDGEFLAG_SET( ej, GL_TRUE );
- RENDER_TRI( ejs, ej1, ej);
- EDGEFLAG_SET( ejs, efs );
- EDGEFLAG_SET( ej1, ef1 );
- EDGEFLAG_SET( ej, ef );
- RESET_STIPPLE;
- }
- } else {
- for (j=start+2;j<count;j++) {
- RENDER_TRI( ELT(start), ELT(j-1), ELT(j) );
- }
- }
-
- POSTFIX;
-}
-
-
-static void TAG(render_poly)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j = start+2;
- LOCAL_VARS;
- (void) flags;
-
- INIT(GL_POLYGON);
- if (NEED_EDGEFLAG_SETUP) {
- GLboolean efstart = EDGEFLAG_GET( ELT(start) );
- GLboolean efcount = EDGEFLAG_GET( ELT(count-1) );
-
- /* If the primitive does not begin here, the first edge
- * is non-boundary.
- */
- if (!TEST_PRIM_BEGIN(flags))
- EDGEFLAG_SET( ELT(start), GL_FALSE );
-
- /* If the primitive does not end here, the final edge is
- * non-boundary.
- */
- if (!TEST_PRIM_END(flags))
- EDGEFLAG_SET( ELT(count-1), GL_FALSE );
-
- /* Draw the first triangles (possibly zero)
- */
- if (j<count-1) {
- GLboolean ef = EDGEFLAG_GET( ELT(j) );
- EDGEFLAG_SET( ELT(j), GL_FALSE );
- RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
- EDGEFLAG_SET( ELT(j), ef );
- j++;
-
- /* Don't render the first edge again:
- */
- EDGEFLAG_SET( ELT(start), GL_FALSE );
-
- for (;j<count-1;j++) {
- GLboolean efj = EDGEFLAG_GET( ELT(j) );
- EDGEFLAG_SET( ELT(j), GL_FALSE );
- RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
- EDGEFLAG_SET( ELT(j), efj );
- }
- }
-
- /* Draw the last or only triangle
- */
- if (j < count)
- RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
-
- /* Restore the first and last edgeflags:
- */
- EDGEFLAG_SET( ELT(count-1), efcount );
- EDGEFLAG_SET( ELT(start), efstart );
-
- if (TEST_PRIM_END(flags)) {
- RESET_STIPPLE;
- }
- }
- else {
- for (j=start+2;j<count;j++) {
- RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
- }
- }
- POSTFIX;
-}
-
-static void TAG(render_quads)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- LOCAL_VARS;
- (void) flags;
-
- INIT(GL_QUADS);
- if (NEED_EDGEFLAG_SETUP) {
- for (j=start+3; j<count; j+=4) {
- /* Use user-specified edgeflags for quads.
- */
- RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) );
- RESET_STIPPLE;
- }
- } else {
- for (j=start+3; j<count; j+=4) {
- RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) );
- }
- }
- POSTFIX;
-}
-
-static void TAG(render_quad_strip)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- GLuint j;
- LOCAL_VARS;
- (void) flags;
-
- INIT(GL_QUAD_STRIP);
- if (NEED_EDGEFLAG_SETUP) {
- for (j=start+3;j<count;j+=2) {
- /* All edges are boundary. Set edgeflags to 1, draw the
- * quad, and restore them to the original values.
- */
- GLboolean ef3 = EDGEFLAG_GET( ELT(j-3) );
- GLboolean ef2 = EDGEFLAG_GET( ELT(j-2) );
- GLboolean ef1 = EDGEFLAG_GET( ELT(j-1) );
- GLboolean ef = EDGEFLAG_GET( ELT(j) );
- EDGEFLAG_SET( ELT(j-3), GL_TRUE );
- EDGEFLAG_SET( ELT(j-2), GL_TRUE );
- EDGEFLAG_SET( ELT(j-1), GL_TRUE );
- EDGEFLAG_SET( ELT(j), GL_TRUE );
- RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) );
- EDGEFLAG_SET( ELT(j-3), ef3 );
- EDGEFLAG_SET( ELT(j-2), ef2 );
- EDGEFLAG_SET( ELT(j-1), ef1 );
- EDGEFLAG_SET( ELT(j), ef );
- RESET_STIPPLE;
- }
- } else {
- for (j=start+3;j<count;j+=2) {
- RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) );
- }
- }
- POSTFIX;
-}
-
-static void TAG(render_noop)( struct gl_context *ctx,
- GLuint start,
- GLuint count,
- GLuint flags )
-{
- (void)(ctx && start && count && flags);
-}
-
-RENDER_TAB_QUALIFIER void (*TAG(render_tab)[GL_POLYGON+2])(struct gl_context *,
- GLuint,
- GLuint,
- GLuint) =
-{
- TAG(render_points),
- TAG(render_lines),
- TAG(render_line_loop),
- TAG(render_line_strip),
- TAG(render_triangles),
- TAG(render_tri_strip),
- TAG(render_tri_fan),
- TAG(render_quads),
- TAG(render_quad_strip),
- TAG(render_poly),
- TAG(render_noop),
-};
-
-
-
-#ifndef PRESERVE_VB_DEFS
-#undef RENDER_TRI
-#undef RENDER_QUAD
-#undef RENDER_LINE
-#undef RENDER_POINTS
-#undef LOCAL_VARS
-#undef INIT
-#undef POSTFIX
-#undef RESET_STIPPLE
-#undef DBG
-#undef ELT
-#undef RENDER_TAB_QUALIFIER
-#endif
-
-#ifndef PRESERVE_TAG
-#undef TAG
-#endif
-
-#undef PRESERVE_VB_DEFS
-#undef PRESERVE_TAG
projects / mesa.git / commitdiff