--- /dev/null
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 4.0.3
+ *
+ * Copyright (C) 1999-2002 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>
+ */
+
+
+/* Template for render stages which build and emit vertices directly
+ * to fixed-size dma buffers. Useful for rendering strips and other
+ * native primitives where clipping and per-vertex tweaks such as
+ * those in t_dd_tritmp.h are not required.
+ *
+ */
+
+#if !HAVE_TRIANGLES || !HAVE_POINTS || !HAVE_LINES
+#error "must have points, lines & triangles to use render template"
+#endif
+
+#if !HAVE_TRI_STRIPS || !HAVE_TRI_FANS
+#error "must have tri strip and fans to use render template"
+#endif
+
+#if !HAVE_LINE_STRIPS
+#error "must have line strips to use render template"
+#endif
+
+#if !HAVE_POLYGONS
+#error "must have polygons to use render template"
+#endif
+
+#if !HAVE_ELTS
+#error "must have elts to use render template"
+#endif
+
+
+#ifndef EMIT_TWO_ELTS
+#define EMIT_TWO_ELTS( offset, elt0, elt1 ) \
+do { \
+ EMIT_ELT( offset, elt0 ); \
+ EMIT_ELT( offset+1, elt1 ); \
+} while (0)
+#endif
+
+
+/**********************************************************************/
+/* Render whole begin/end objects */
+/**********************************************************************/
+
+
+static void TAG(emit_elts)( GLcontext *ctx, GLuint *elts, GLuint nr )
+{
+ GLint i;
+ LOCAL_VARS;
+ ELTS_VARS;
+
+ ALLOC_ELTS( nr );
+
+ for ( i = 0 ; i < nr ; i+=2, elts += 2 ) {
+ EMIT_TWO_ELTS( 0, elts[0], elts[1] );
+ INCR_ELTS( 2 );
+ }
+}
+
+static void TAG(emit_consecutive_elts)( GLcontext *ctx, GLuint start, GLuint nr )
+{
+ GLint i;
+ LOCAL_VARS;
+ ELTS_VARS;
+
+ ALLOC_ELTS( nr );
+
+ for ( i = 0 ; i+1 < nr ; i+=2, start += 2 ) {
+ EMIT_TWO_ELTS( 0, start, start+1 );
+ INCR_ELTS( 2 );
+ }
+ if (i < nr) {
+ EMIT_ELT( 0, start );
+ INCR_ELTS( 1 );
+ }
+}
+
+/***********************************************************************
+ * Render non-indexed primitives.
+ ***********************************************************************/
+
+
+
+static void TAG(render_points_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ if (start < count) {
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+ EMIT_PRIM( ctx, GL_POINTS, HW_POINTS, start, count );
+ }
+}
+
+static void TAG(render_lines_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+ count -= (count-start) & 1;
+
+ if (start+1 >= count)
+ return;
+
+ if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag) {
+ RESET_STIPPLE();
+ AUTO_STIPPLE( GL_TRUE );
+ }
+
+ EMIT_PRIM( ctx, GL_LINES, HW_LINES, start, count );
+
+ if ((flags & PRIM_END) && ctx->Line.StippleFlag)
+ AUTO_STIPPLE( GL_FALSE );
+}
+
+
+static void TAG(render_line_strip_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (start+1 >= count)
+ return;
+
+ if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag)
+ RESET_STIPPLE();
+
+
+ if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_LINES ))
+ {
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint j, nr;
+
+ ELT_INIT( GL_LINES, HW_LINES );
+
+ /* Emit whole number of lines in each full buffer.
+ */
+ dmasz = dmasz/2;
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ currentsz = currentsz/2;
+
+ if (currentsz < 4) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start; j + 1 < count; j += nr - 1 ) {
+ GLint i;
+ ELTS_VARS;
+ nr = MIN2( currentsz, count - j );
+
+ ALLOC_ELTS( (nr-1)*2 );
+
+ for ( i = j ; i+1 < j+nr ; i+=1 ) {
+ EMIT_TWO_ELTS( 0, (i+0), (i+1) );
+ INCR_ELTS( 2 );
+ }
+
+ if (nr == currentsz) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+ }
+ }
+ else
+ EMIT_PRIM( ctx, GL_LINE_STRIP, HW_LINE_STRIP, start, count );
+}
+
+
+static void TAG(render_line_loop_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ GLuint j, nr;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (flags & PRIM_BEGIN) {
+ j = start;
+ if (ctx->Line.StippleFlag)
+ RESET_STIPPLE( );
+ }
+ else
+ j = start + 1;
+
+ if (flags & PRIM_END) {
+
+ if (start+1 >= count)
+ return;
+
+ if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_LINES )) {
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+
+ ELT_INIT( GL_LINES, HW_LINES );
+
+ /* Emit whole number of lines in each full buffer.
+ */
+ dmasz = dmasz/2;
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ currentsz = currentsz/2;
+
+ if (currentsz < 4) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ /* Ensure last vertex doesn't wrap:
+ */
+ currentsz--;
+ dmasz--;
+
+ for (; j + 1 < count; ) {
+ GLint i;
+ ELTS_VARS;
+ nr = MIN2( currentsz, count - j );
+
+ ALLOC_ELTS( (nr-1)*2 );
+ for ( i = j ; i+1 < j+nr ; i+=1 ) {
+ EMIT_TWO_ELTS( 0, (i+0), (i+1) );
+ INCR_ELTS( 2 );
+ }
+
+ j += nr - 1;
+ if (j + 1 < count) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+ else {
+ ALLOC_ELTS( 2 );
+ EMIT_TWO_ELTS( 0, (j), (start) );
+ INCR_ELTS( 2 );
+ }
+ }
+ }
+ else
+ {
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+
+ ELT_INIT( GL_LINE_STRIP, HW_LINE_STRIP );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+
+ if (currentsz < 8) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ /* Ensure last vertex doesn't wrap:
+ */
+ currentsz--;
+ dmasz--;
+
+ for ( ; j + 1 < count; ) {
+ nr = MIN2( currentsz, count - j );
+ if (j + nr < count) {
+ TAG(emit_consecutive_elts)( ctx, j, nr );
+ currentsz = dmasz;
+ j += nr - 1;
+ NEW_BUFFER();
+ }
+ else if (nr) {
+ ELTS_VARS;
+ int i;
+
+ ALLOC_ELTS( nr + 1 );
+ for ( i = 0 ; i+1 < nr ; i+=2, j += 2 ) {
+ EMIT_TWO_ELTS( 0, j, j+1 );
+ INCR_ELTS( 2 );
+ }
+ if (i < nr) {
+ EMIT_ELT( 0, j ); j++;
+ INCR_ELTS( 1 );
+ }
+ EMIT_ELT( 0, start );
+ INCR_ELTS( 1 );
+ NEW_BUFFER();
+ }
+ else {
+ fprintf(stderr, "warining nr==0\n");
+ }
+ }
+ }
+ } else {
+ TAG(render_line_strip_verts)( ctx, j, count, flags );
+ }
+}
+
+
+static void TAG(render_triangles_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ count -= (count-start)%3;
+
+ if (start+2 >= count) {
+ return;
+ }
+
+ /* need a PREFER_DISCRETE_ELT_PRIM here too..
+ */
+ EMIT_PRIM( ctx, GL_TRIANGLES, HW_TRIANGLES, start, count );
+}
+
+
+
+static void TAG(render_tri_strip_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (start + 2 >= count)
+ return;
+
+ if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_TRIANGLES ))
+ {
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ int parity = 0;
+ GLuint j, nr;
+
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+
+ if (flags & PRIM_PARITY)
+ parity = 1;
+
+ /* Emit even number of tris in each full buffer.
+ */
+ dmasz = dmasz/3;
+ dmasz -= dmasz & 1;
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ currentsz = currentsz/3;
+ currentsz -= currentsz & 1;
+
+ if (currentsz < 4) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start; j + 2 < count; j += nr - 2 ) {
+ GLint i;
+ ELTS_VARS;
+ nr = MIN2( currentsz, count - j );
+
+ ALLOC_ELTS( (nr-2)*3 );
+
+ for ( i = j ; i+2 < j+nr ; i++, parity^=1 ) {
+ EMIT_ELT( 0, (i+0+parity) );
+ EMIT_ELT( 1, (i+1-parity) );
+ EMIT_ELT( 2, (i+2) );
+ INCR_ELTS( 3 );
+ }
+
+ if (nr == currentsz) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+ }
+ }
+ else if ((flags & PRIM_PARITY) == 0)
+ EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0, start, count );
+ else if (HAVE_TRI_STRIP_1)
+ EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_1, start, count );
+ else {
+ /* Emit the first triangle with elts, then the rest as a regular strip.
+ * TODO: Make this unlikely in t_imm_api.c
+ */
+ ELTS_VARS;
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+ ALLOC_ELTS( 3 );
+ EMIT_ELT( 0, (start+1) );
+ EMIT_ELT( 1, (start+0) );
+ EMIT_ELT( 2, (start+2) );
+ INCR_ELTS( 3 );
+ NEW_PRIMITIVE();
+
+ start++;
+ if (start + 2 >= count)
+ return;
+
+ EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0, start,
+ count );
+ }
+}
+
+static void TAG(render_tri_fan_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (start+2 >= count)
+ return;
+
+ if (PREFER_DISCRETE_ELT_PRIM( count-start, HW_TRIANGLES ))
+ {
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint j, nr;
+
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+
+ dmasz = dmasz/3;
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ currentsz = currentsz/3;
+
+ if (currentsz < 4) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start + 1; j + 1 < count; j += nr - 1 ) {
+ GLint i;
+ ELTS_VARS;
+ nr = MIN2( currentsz, count - j );
+
+ ALLOC_ELTS( (nr-1)*3 );
+
+ for ( i = j ; i+1 < j+nr ; i++ ) {
+ EMIT_ELT( 0, (start) );
+ EMIT_ELT( 1, (i) );
+ EMIT_ELT( 2, (i+1) );
+ INCR_ELTS( 3 );
+ }
+
+ if (nr == currentsz) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+ }
+ }
+ else {
+ EMIT_PRIM( ctx, GL_TRIANGLE_FAN, HW_TRIANGLE_FAN, start, count );
+ }
+}
+
+
+static void TAG(render_poly_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (start+2 >= count)
+ return;
+
+ EMIT_PRIM( ctx, GL_POLYGON, HW_POLYGON, start, count );
+}
+
+static void TAG(render_quad_strip_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ count -= (count-start) & 1;
+
+ if (start+3 >= count)
+ return;
+
+ if (HAVE_QUAD_STRIPS) {
+ EMIT_PRIM( ctx, GL_QUAD_STRIP, HW_QUAD_STRIP, start, count );
+ }
+ else if (ctx->_TriangleCaps & DD_FLATSHADE) {
+ LOCAL_VARS;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint j, nr;
+
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+
+ /* Emit whole number of quads in total, and in each buffer.
+ */
+ currentsz = (currentsz/6)*2;
+ dmasz = (dmasz/6)*2;
+
+ if (currentsz < 4) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start; j + 3 < count; j += nr - 2 ) {
+ ELTS_VARS;
+ GLint quads, i;
+
+ nr = MIN2( currentsz, count - j );
+ quads = (nr/2)-1;
+
+ ALLOC_ELTS( quads*6 );
+
+ for ( i = j ; i < j+quads*2 ; i+=2 ) {
+ EMIT_TWO_ELTS( 0, (i+0), (i+1) );
+ EMIT_TWO_ELTS( 2, (i+2), (i+1) );
+ EMIT_TWO_ELTS( 4, (i+3), (i+2) );
+ INCR_ELTS( 6 );
+ }
+
+ if (nr == currentsz) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+ }
+ }
+ else {
+ EMIT_PRIM( ctx, GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0, start, count );
+ }
+}
+
+
+static void TAG(render_quads_verts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+ count -= (count-start)%4;
+
+ if (start+3 >= count)
+ return;
+
+ if (HAVE_QUADS) {
+ EMIT_PRIM( ctx, HW_QUADS, GL_QUADS, start, count );
+ }
+ else {
+ /* Hardware doesn't have a quad primitive type -- simulate it
+ * using indexed vertices and the triangle primitive:
+ */
+ LOCAL_VARS;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint j, nr;
+
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+
+ /* Adjust for rendering as triangles:
+ */
+ currentsz = (currentsz/6)*4;
+ dmasz = (dmasz/6)*4;
+
+ if (currentsz < 8) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start; j < count; j += nr ) {
+ ELTS_VARS;
+ GLint quads, i;
+ nr = MIN2( currentsz, count - j );
+ quads = nr/4;
+
+ ALLOC_ELTS( quads*6 );
+
+ for ( i = j ; i < j+quads*4 ; i+=4 ) {
+ EMIT_TWO_ELTS( 0, (i+0), (i+1) );
+ EMIT_TWO_ELTS( 2, (i+3), (i+1) );
+ EMIT_TWO_ELTS( 4, (i+2), (i+3) );
+ INCR_ELTS( 6 );
+ }
+
+ if (nr == currentsz) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+ }
+ }
+}
+
+static void TAG(render_noop)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+}
+
+
+
+
+static render_func TAG(render_tab_verts)[GL_POLYGON+2] =
+{
+ TAG(render_points_verts),
+ TAG(render_lines_verts),
+ TAG(render_line_loop_verts),
+ TAG(render_line_strip_verts),
+ TAG(render_triangles_verts),
+ TAG(render_tri_strip_verts),
+ TAG(render_tri_fan_verts),
+ TAG(render_quads_verts),
+ TAG(render_quad_strip_verts),
+ TAG(render_poly_verts),
+ TAG(render_noop),
+};
+
+
+/****************************************************************************
+ * Render elts using hardware indexed verts *
+ ****************************************************************************/
+
+static void TAG(render_points_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint *elts = GET_ELTS();
+ GLuint j, nr;
+
+ ELT_INIT( GL_POINTS, HW_POINTS );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8)
+ currentsz = dmasz;
+
+ for (j = start; j < count; j += nr ) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+}
+
+
+
+static void TAG(render_lines_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint *elts = GET_ELTS();
+ GLuint j, nr;
+
+ if (start+1 >= count)
+ return;
+
+ if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag) {
+ RESET_STIPPLE();
+ AUTO_STIPPLE( GL_TRUE );
+ }
+
+ ELT_INIT( GL_LINES, HW_LINES );
+
+ /* Emit whole number of lines in total and in each buffer:
+ */
+ count -= (count-start) & 1;
+ currentsz -= currentsz & 1;
+ dmasz -= dmasz & 1;
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8)
+ currentsz = dmasz;
+
+ for (j = start; j < count; j += nr ) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+
+ if ((flags & PRIM_END) && ctx->Line.StippleFlag)
+ AUTO_STIPPLE( GL_FALSE );
+}
+
+
+static void TAG(render_line_strip_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint *elts = GET_ELTS();
+ GLuint j, nr;
+
+ if (start+1 >= count)
+ return;
+
+ ELT_INIT( GL_LINE_STRIP, HW_LINE_STRIP );
+
+ if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag)
+ RESET_STIPPLE();
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8)
+ currentsz = dmasz;
+
+ for (j = start; j + 1 < count; j += nr - 1 ) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+}
+
+
+static void TAG(render_line_loop_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint *elts = GET_ELTS();
+ GLuint j, nr;
+
+ if (0) fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (flags & PRIM_BEGIN)
+ j = start;
+ else
+ j = start + 1;
+
+
+ if (flags & PRIM_END) {
+ if (start+1 >= count)
+ return;
+ }
+ else {
+ if (j+1 >= count)
+ return;
+ }
+
+ ELT_INIT( GL_LINE_STRIP, HW_LINE_STRIP );
+
+ if ((flags & PRIM_BEGIN) && ctx->Line.StippleFlag)
+ RESET_STIPPLE();
+
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ /* Ensure last vertex doesn't wrap:
+ */
+ currentsz--;
+ dmasz--;
+
+ for ( ; j + 1 < count; j += nr - 1 ) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ currentsz = dmasz;
+ }
+
+ if (flags & PRIM_END)
+ TAG(emit_elts)( ctx, elts+start, 1 );
+
+ NEW_PRIMITIVE();
+}
+
+
+static void TAG(render_triangles_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ GLuint *elts = GET_ELTS();
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS()/3*3;
+ int currentsz;
+ GLuint j, nr;
+
+ if (start+2 >= count)
+ return;
+
+/* NEW_PRIMITIVE(); */
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+
+ /* Emit whole number of tris in total. dmasz is already a multiple
+ * of 3.
+ */
+ count -= (count-start)%3;
+ currentsz -= currentsz%3;
+ if (currentsz < 8)
+ currentsz = dmasz;
+
+ for (j = start; j < count; j += nr) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+}
+
+
+
+static void TAG(render_tri_strip_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ GLuint j, nr;
+ GLuint *elts = GET_ELTS();
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+
+ if (start+2 >= count)
+ return;
+
+ ELT_INIT( GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0 );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ if ((flags & PRIM_PARITY) && count - start > 2) {
+ TAG(emit_elts)( ctx, elts+start, 1 );
+ currentsz--;
+ }
+
+ /* Keep the same winding over multiple buffers:
+ */
+ dmasz -= (dmasz & 1);
+ currentsz -= (currentsz & 1);
+
+ for (j = start ; j + 2 < count; j += nr - 2 ) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+}
+
+static void TAG(render_tri_fan_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ GLuint *elts = GET_ELTS();
+ GLuint j, nr;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+
+ if (start+2 >= count)
+ return;
+
+ ELT_INIT( GL_TRIANGLE_FAN, HW_TRIANGLE_FAN );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start + 1 ; j + 1 < count; j += nr - 1 ) {
+ nr = MIN2( currentsz, count - j + 1 );
+ TAG(emit_elts)( ctx, elts+start, 1 );
+ TAG(emit_elts)( ctx, elts+j, nr - 1 );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+}
+
+
+static void TAG(render_poly_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ LOCAL_VARS;
+ GLuint *elts = GET_ELTS();
+ GLuint j, nr;
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+
+ if (start+2 >= count)
+ return;
+
+ ELT_INIT( GL_POLYGON, HW_POLYGON );
+
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+ if (currentsz < 8) {
+ NEW_BUFFER();
+ currentsz = dmasz;
+ }
+
+ for (j = start + 1 ; j + 1 < count ; j += nr - 1 ) {
+ nr = MIN2( currentsz, count - j + 1 );
+ TAG(emit_elts)( ctx, elts+start, 1 );
+ TAG(emit_elts)( ctx, elts+j, nr - 1 );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+}
+
+static void TAG(render_quad_strip_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ if (start+3 >= count)
+ return;
+
+ if (HAVE_QUAD_STRIPS && 0) {
+ }
+ else {
+ LOCAL_VARS;
+ GLuint *elts = GET_ELTS();
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint j, nr;
+
+ NEW_PRIMITIVE();
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+
+ /* Emit whole number of quads in total, and in each buffer.
+ */
+ dmasz -= dmasz & 1;
+ count -= (count-start) & 1;
+ currentsz -= currentsz & 1;
+
+ if (currentsz < 12)
+ currentsz = dmasz;
+
+ if (ctx->_TriangleCaps & DD_FLATSHADE) {
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+
+ currentsz = currentsz/6*2;
+ dmasz = dmasz/6*2;
+
+ for (j = start; j + 3 < count; j += nr - 2 ) {
+ nr = MIN2( currentsz, count - j );
+
+ if (nr >= 4)
+ {
+ GLint i;
+ GLint quads = (nr/2)-1;
+ ELTS_VARS;
+
+ ALLOC_ELTS( quads*6 );
+
+ for ( i = j-start ; i < j-start+quads ; i++, elts += 2 ) {
+ EMIT_TWO_ELTS( 0, elts[0], elts[1] );
+ EMIT_TWO_ELTS( 2, elts[2], elts[1] );
+ EMIT_TWO_ELTS( 4, elts[3], elts[2] );
+ INCR_ELTS( 6 );
+ }
+
+ NEW_PRIMITIVE();
+ }
+
+ currentsz = dmasz;
+ }
+ }
+ else {
+ ELT_INIT( GL_TRIANGLE_STRIP, HW_TRIANGLE_STRIP_0 );
+
+ for (j = start; j + 3 < count; j += nr - 2 ) {
+ nr = MIN2( currentsz, count - j );
+ TAG(emit_elts)( ctx, elts+j, nr );
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+ }
+ }
+}
+
+
+static void TAG(render_quads_elts)( GLcontext *ctx,
+ GLuint start,
+ GLuint count,
+ GLuint flags )
+{
+ if (start+3 >= count)
+ return;
+
+ if (HAVE_QUADS && 0) {
+ } else {
+ LOCAL_VARS;
+ GLuint *elts = GET_ELTS();
+ int dmasz = GET_SUBSEQUENT_VB_MAX_ELTS();
+ int currentsz;
+ GLuint j, nr;
+
+ ELT_INIT( GL_TRIANGLES, HW_TRIANGLES );
+ currentsz = GET_CURRENT_VB_MAX_ELTS();
+
+ /* Emit whole number of quads in total, and in each buffer.
+ */
+ dmasz -= dmasz & 3;
+ count -= (count-start) & 3;
+ currentsz -= currentsz & 3;
+
+ /* Adjust for rendering as triangles:
+ */
+ currentsz = currentsz/6*4;
+ dmasz = dmasz/6*4;
+
+ if (currentsz < 8)
+ currentsz = dmasz;
+
+ for (j = start; j + 3 < count; j += nr - 2 ) {
+ nr = MIN2( currentsz, count - j );
+
+ if (nr >= 4)
+ {
+ GLint quads = nr/4;
+ GLint i;
+ ELTS_VARS;
+ ALLOC_ELTS( quads * 6 );
+
+ for ( i = j-start ; i < j-start+quads ; i++, elts += 4 ) {
+ EMIT_TWO_ELTS( 0, elts[0], elts[1] );
+ EMIT_TWO_ELTS( 2, elts[3], elts[1] );
+ EMIT_TWO_ELTS( 4, elts[2], elts[3] );
+ INCR_ELTS( 6 );
+ }
+ }
+
+ NEW_PRIMITIVE();
+ currentsz = dmasz;
+ }
+ }
+}
+
+
+
+static render_func TAG(render_tab_elts)[GL_POLYGON+2] =
+{
+ TAG(render_points_elts),
+ TAG(render_lines_elts),
+ TAG(render_line_loop_elts),
+ TAG(render_line_strip_elts),
+ TAG(render_triangles_elts),
+ TAG(render_tri_strip_elts),
+ TAG(render_tri_fan_elts),
+ TAG(render_quads_elts),
+ TAG(render_quad_strip_elts),
+ TAG(render_poly_elts),
+ TAG(render_noop),
+};
--- /dev/null
+#ifndef DO_DEBUG_VERTS
+#define DO_DEBUG_VERTS 0
+#endif
+
+#ifndef PRINT_VERTEX
+#define PRINT_VERTEX(x)
+#endif
+
+#if defined(USE_X86_ASM)
+#define COPY_DWORDS( j, vb, vertsize, v ) \
+do { \
+ int __tmp; \
+ __asm__ __volatile__( "rep ; movsl" \
+ : "=%c" (j), "=D" (vb), "=S" (__tmp) \
+ : "0" (vertsize), \
+ "D" ((long)vb), \
+ "S" ((long)v) ); \
+} while (0)
+#else
+#define COPY_DWORDS( j, vb, vertsize, v ) \
+do { \
+ for ( j = 0 ; j < vertsize ; j++ ) \
+ vb[j] = ((GLuint *)v)[j]; \
+ vb += vertsize; \
+} while (0)
+#endif
+
+
+
+#if HAVE_QUADS
+static __inline void TAG(quad)( CTX_ARG,
+ VERTEX *v0,
+ VERTEX *v1,
+ VERTEX *v2,
+ VERTEX *v3 )
+{
+ GLuint vertsize = GET_VERTEX_DWORDS();
+ GLuint *vb = (GLuint *)ALLOC_VERTS( 4, vertsize);
+ GLuint j;
+
+ if (DO_DEBUG_VERTS) {
+ fprintf(stderr, "%s\n", __FUNCTION__);
+ PRINT_VERTEX(v0);
+ PRINT_VERTEX(v1);
+ PRINT_VERTEX(v2);
+ PRINT_VERTEX(v3);
+ }
+
+ COPY_DWORDS( j, vb, vertsize, v0 );
+ COPY_DWORDS( j, vb, vertsize, v1 );
+ COPY_DWORDS( j, vb, vertsize, v2 );
+ COPY_DWORDS( j, vb, vertsize, v3 );
+}
+#else
+static __inline void TAG(quad)( CTX_ARG,
+ VERTEX *v0,
+ VERTEX *v1,
+ VERTEX *v2,
+ VERTEX *v3 )
+{
+ GLuint vertsize = GET_VERTEX_DWORDS();
+ GLuint *vb = (GLuint *)ALLOC_VERTS( 6, vertsize);
+ GLuint j;
+
+ if (DO_DEBUG_VERTS) {
+ fprintf(stderr, "%s\n", __FUNCTION__);
+ PRINT_VERTEX(v0);
+ PRINT_VERTEX(v1);
+ PRINT_VERTEX(v2);
+ PRINT_VERTEX(v3);
+ }
+
+ COPY_DWORDS( j, vb, vertsize, v0 );
+ COPY_DWORDS( j, vb, vertsize, v1 );
+ COPY_DWORDS( j, vb, vertsize, v3 );
+ COPY_DWORDS( j, vb, vertsize, v1 );
+ COPY_DWORDS( j, vb, vertsize, v2 );
+ COPY_DWORDS( j, vb, vertsize, v3 );
+}
+#endif
+
+
+static __inline void TAG(triangle)( CTX_ARG,
+ VERTEX *v0,
+ VERTEX *v1,
+ VERTEX *v2 )
+{
+ GLuint vertsize = GET_VERTEX_DWORDS();
+ GLuint *vb = (GLuint *)ALLOC_VERTS( 3, vertsize);
+ GLuint j;
+
+ if (DO_DEBUG_VERTS) {
+ fprintf(stderr, "%s\n", __FUNCTION__);
+ PRINT_VERTEX(v0);
+ PRINT_VERTEX(v1);
+ PRINT_VERTEX(v2);
+ }
+
+ COPY_DWORDS( j, vb, vertsize, v0 );
+ COPY_DWORDS( j, vb, vertsize, v1 );
+ COPY_DWORDS( j, vb, vertsize, v2 );
+}
+
+
+#if HAVE_LINES
+static __inline void TAG(line)( CTX_ARG,
+ VERTEX *v0,
+ VERTEX *v1 )
+{
+ GLuint vertsize = GET_VERTEX_DWORDS();
+ GLuint *vb = (GLuint *)ALLOC_VERTS( 2, vertsize);
+ GLuint j;
+
+ COPY_DWORDS( j, vb, vertsize, v0 );
+ COPY_DWORDS( j, vb, vertsize, v1 );
+}
+#endif
+
+#if HAVE_POINTS
+static __inline void TAG(point)( CTX_ARG,
+ VERTEX *v0 )
+{
+ GLuint vertsize = GET_VERTEX_DWORDS();
+ GLuint *vb = (GLuint *)ALLOC_VERTS( 1, vertsize);
+ int j;
+
+ COPY_DWORDS( j, vb, vertsize, v0 );
+}
+#endif
+
+
+static void TAG(fast_clipped_poly)( GLcontext *ctx, const GLuint *elts,
+ GLuint n )
+{
+ LOCAL_VARS
+ GLuint vertsize = GET_VERTEX_DWORDS();
+ GLuint *vb = (GLuint *)ALLOC_VERTS( (n-2) * 3, vertsize );
+ const GLuint *start = (const GLuint *)VERT(elts[0]);
+ int i,j;
+
+ if (DO_DEBUG_VERTS) {
+ fprintf(stderr, "%s\n", __FUNCTION__);
+ PRINT_VERTEX(VERT(elts[0]));
+ PRINT_VERTEX(VERT(elts[1]));
+ }
+
+ for (i = 2 ; i < n ; i++) {
+ if (DO_DEBUG_VERTS) {
+ PRINT_VERTEX(VERT(elts[i]));
+ }
+
+ COPY_DWORDS( j, vb, vertsize, VERT(elts[i-1]) );
+ COPY_DWORDS( j, vb, vertsize, VERT(elts[i]) );
+ COPY_DWORDS( j, vb, vertsize, start );
+ }
+}
+
projects / mesa.git / commitdiff