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Diffstat (limited to 'src/mesa/tnl/t_vtx_eval.c')
-rw-r--r--src/mesa/tnl/t_vtx_eval.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/src/mesa/tnl/t_vtx_eval.c b/src/mesa/tnl/t_vtx_eval.c
new file mode 100644
index 0000000000..5b5cb624c9
--- /dev/null
+++ b/src/mesa/tnl/t_vtx_eval.c
@@ -0,0 +1,253 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 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>
+ */
+
+#include "glheader.h"
+#include "api_eval.h"
+#include "context.h"
+#include "macros.h"
+#include "math/m_eval.h"
+#include "t_vtx_api.h"
+
+
+static void clear_active_eval1( TNLcontext *tnl, GLuint attr )
+{
+ tnl->vtx.eval.map1[attr].map = 0;
+}
+
+static void clear_active_eval2( TNLcontext *tnl, GLuint attr )
+{
+ tnl->vtx.eval.map2[attr].map = 0;
+}
+
+static void set_active_eval1( TNLcontext *tnl, GLuint attr, GLuint dim,
+ struct gl_1d_map *map )
+{
+ if (!tnl->vtx.eval.map1[attr].map) {
+ tnl->vtx.eval.map1[attr].map = map;
+ tnl->vtx.eval.map1[attr].sz = dim;
+ }
+}
+
+static void set_active_eval2( TNLcontext *tnl, GLuint attr, GLuint dim,
+ struct gl_2d_map *map )
+{
+ if (!tnl->vtx.eval.map2[attr].map) {
+ tnl->vtx.eval.map2[attr].map = map;
+ tnl->vtx.eval.map2[attr].sz = dim;
+ }
+}
+
+void _tnl_update_eval( GLcontext *ctx )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ GLuint attr;
+
+ /* Vertex program maps have priority over conventional attribs */
+
+ for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
+ clear_active_eval1( tnl, attr );
+ clear_active_eval2( tnl, attr );
+ }
+
+ if (ctx->VertexProgram.Enabled) {
+ for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
+ if (ctx->Eval.Map1Attrib[attr])
+ set_active_eval1( tnl, attr, 4, &ctx->EvalMap.Map1Attrib[attr] );
+
+ if (ctx->Eval.Map2Attrib[attr])
+ set_active_eval2( tnl, attr, 4, &ctx->EvalMap.Map2Attrib[attr] );
+ }
+ }
+
+ if (ctx->Eval.Map1Color4)
+ set_active_eval1( tnl, VERT_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 );
+
+ if (ctx->Eval.Map2Color4)
+ set_active_eval2( tnl, VERT_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 );
+
+ if (ctx->Eval.Map1TextureCoord4)
+ set_active_eval1( tnl, VERT_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 );
+ else if (ctx->Eval.Map1TextureCoord3)
+ set_active_eval1( tnl, VERT_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 );
+ else if (ctx->Eval.Map1TextureCoord2)
+ set_active_eval1( tnl, VERT_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 );
+ else if (ctx->Eval.Map1TextureCoord1)
+ set_active_eval1( tnl, VERT_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 );
+
+ if (ctx->Eval.Map2TextureCoord4)
+ set_active_eval2( tnl, VERT_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 );
+ else if (ctx->Eval.Map2TextureCoord3)
+ set_active_eval2( tnl, VERT_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 );
+ else if (ctx->Eval.Map2TextureCoord2)
+ set_active_eval2( tnl, VERT_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 );
+ else if (ctx->Eval.Map2TextureCoord1)
+ set_active_eval2( tnl, VERT_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 );
+
+ if (ctx->Eval.Map1Normal)
+ set_active_eval1( tnl, VERT_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
+
+ if (ctx->Eval.Map2Normal)
+ set_active_eval2( tnl, VERT_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
+
+ if (ctx->Eval.Map1Vertex4)
+ set_active_eval1( tnl, VERT_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
+ else if (ctx->Eval.Map1Vertex3)
+ set_active_eval1( tnl, VERT_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
+
+ if (ctx->Eval.Map2Vertex4)
+ set_active_eval2( tnl, VERT_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
+ else if (ctx->Eval.Map2Vertex3)
+ set_active_eval2( tnl, VERT_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
+
+ tnl->vtx.eval.new_state = 0;
+}
+
+
+
+void _tnl_do_EvalCoord1f(GLcontext* ctx, GLfloat u)
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ GLuint attr;
+
+ for (attr = 1; attr <= _TNL_ATTRIB_INDEX; attr++) {
+ struct gl_1d_map *map = tnl->vtx.eval.map1[attr].map;
+ if (map) {
+ GLfloat uu = (u - map->u1) * map->du;
+ GLfloat data[4];
+
+ ASSIGN_4V(data, 0, 0, 0, 1);
+
+ _math_horner_bezier_curve(map->Points, data, uu,
+ tnl->vtx.eval.map1[attr].sz,
+ map->Order);
+
+ COPY_SZ_4V( tnl->vtx.attrptr[attr],
+ tnl->vtx.attrsz[attr],
+ data );
+ }
+ }
+
+ /** Vertex -- EvalCoord1f is a noop if this map not enabled:
+ **/
+ if (tnl->vtx.eval.map1[0].map) {
+ struct gl_1d_map *map = tnl->vtx.eval.map1[0].map;
+ GLfloat uu = (u - map->u1) * map->du;
+ GLfloat vertex[4];
+
+ ASSIGN_4V(vertex, 0, 0, 0, 1);
+
+ _math_horner_bezier_curve(map->Points, vertex, uu,
+ tnl->vtx.eval.map1[0].sz,
+ map->Order);
+
+ if (tnl->vtx.eval.map1[0].sz == 4)
+ glVertex4fv( vertex );
+ else
+ glVertex3fv( vertex );
+ }
+}
+
+
+
+void _tnl_do_EvalCoord2f( GLcontext* ctx, GLfloat u, GLfloat v )
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ GLuint attr;
+
+ for (attr = 1; attr <= _TNL_ATTRIB_INDEX; attr++) {
+ struct gl_2d_map *map = tnl->vtx.eval.map2[attr].map;
+ if (map) {
+ GLfloat uu = (u - map->u1) * map->du;
+ GLfloat vv = (v - map->v1) * map->dv;
+ GLfloat data[4];
+
+ ASSIGN_4V(data, 0, 0, 0, 1);
+
+ _math_horner_bezier_surf(map->Points,
+ data,
+ uu, vv,
+ tnl->vtx.eval.map2[attr].sz,
+ map->Uorder, map->Vorder);
+
+ COPY_SZ_4V( tnl->vtx.attrptr[attr],
+ tnl->vtx.attrsz[attr],
+ data );
+ }
+ }
+
+ /** Vertex -- EvalCoord2f is a noop if this map not enabled:
+ **/
+ if (tnl->vtx.eval.map2[0].map) {
+ struct gl_2d_map *map = tnl->vtx.eval.map2[0].map;
+ GLfloat uu = (u - map->u1) * map->du;
+ GLfloat vv = (v - map->v1) * map->dv;
+ GLfloat vertex[4];
+
+ ASSIGN_4V(vertex, 0, 0, 0, 1);
+
+ if (ctx->Eval.AutoNormal) {
+ GLfloat normal[3];
+ GLfloat du[4], dv[4];
+
+ _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
+ tnl->vtx.eval.map2[0].sz,
+ map->Uorder, map->Vorder);
+
+ if (tnl->vtx.eval.map2[0].sz == 4) {
+ du[0] = du[0]*vertex[3] - du[3]*vertex[0];
+ du[1] = du[1]*vertex[3] - du[3]*vertex[1];
+ du[2] = du[2]*vertex[3] - du[3]*vertex[2];
+
+ dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
+ dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
+ dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
+ }
+
+
+ CROSS3(normal, du, dv);
+ NORMALIZE_3FV(normal);
+ normal[3] = 1.0;
+
+ COPY_SZ_4V( tnl->vtx.attrptr[_TNL_ATTRIB_NORMAL],
+ tnl->vtx.attrsz[_TNL_ATTRIB_NORMAL],
+ normal );
+
+ }
+ else {
+ _math_horner_bezier_surf(map->Points, vertex, uu, vv,
+ tnl->vtx.eval.map2[0].sz,
+ map->Uorder, map->Vorder);
+ }
+
+ if (tnl->vtx.attrsz[0] == 4)
+ glVertex4fv( vertex );
+ else
+ glVertex3fv( vertex );
+ }
+}
+
+
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