diff options
Diffstat (limited to 'src/mesa/tnl/t_eval_api.c')
| -rw-r--r-- | src/mesa/tnl/t_eval_api.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/mesa/tnl/t_eval_api.c b/src/mesa/tnl/t_eval_api.c new file mode 100644 index 0000000000..efe7876333 --- /dev/null +++ b/src/mesa/tnl/t_eval_api.c @@ -0,0 +1,209 @@ +/* $Id: t_eval_api.c,v 1.1 2000/12/26 05:09:32 keithw Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.5 + * + * Copyright (C) 1999-2000 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. + */ + + +#include "glheader.h" +#include "colormac.h" +#include "context.h" +#include "macros.h" +#include "mem.h" +#include "mmath.h" +#include "mtypes.h" +#include "math/m_eval.h" + +#include "t_eval_api.h" +#include "t_imm_api.h" +#include "t_imm_alloc.h" +#include "t_imm_exec.h" + + + + + +/* KW: If are compiling, we don't know whether eval will produce a + * vertex when it is run in the future. If this is pure immediate + * mode, eval is a noop if neither vertex map is enabled. + * + * Thus we need to have a check in the display list code or + * elsewhere for eval(1,2) vertices in the case where + * map(1,2)_vertex is disabled, and to purge those vertices from + * the vb. + */ +void +_tnl_exec_EvalMesh1( GLenum mode, GLint i1, GLint i2 ) +{ + GET_CURRENT_CONTEXT(ctx); + GLint i; + GLfloat u, du; + GLenum prim; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + switch (mode) { + case GL_POINT: + prim = GL_POINTS; + break; + case GL_LINE: + prim = GL_LINE_STRIP; + break; + default: + gl_error( ctx, GL_INVALID_ENUM, "glEvalMesh1(mode)" ); + return; + } + + /* No effect if vertex maps disabled. + */ + if (!ctx->Eval.Map1Vertex4 && !ctx->Eval.Map1Vertex3) + return; + + du = ctx->Eval.MapGrid1du; + u = ctx->Eval.MapGrid1u1 + i1 * du; + + /* Need to turn off compilation -- this is already saved, and the + * coordinates generated and the test above depend on state that + * may change before the list is executed. + * + * TODO: Anaylse display lists to determine if this state is + * constant. + */ + { + GLboolean compiling = ctx->CompileFlag; + struct immediate *im = TNL_CURRENT_IM(ctx); + + if (compiling) { + FLUSH_VERTICES( ctx, 0 ); + SET_IMMEDIATE( ctx, _tnl_alloc_immediate( ctx ) ); + ctx->CompileFlag = GL_FALSE; + } + + _tnl_begin( ctx, prim ); + for (i=i1;i<=i2;i++,u+=du) { + _tnl_eval_coord1f( ctx, u ); + } + _tnl_end(ctx); + + if (compiling) { + FLUSH_VERTICES( ctx, 0 ); + ASSERT( TNL_CURRENT_IM(ctx)->ref_count == 0 ); + _tnl_free_immediate( TNL_CURRENT_IM(ctx) ); + SET_IMMEDIATE( ctx, im ); + ctx->CompileFlag = GL_TRUE; + } + } +} + + + +void +_tnl_exec_EvalMesh2( GLenum mode, GLint i1, GLint i2, GLint j1, GLint j2 ) +{ + GET_CURRENT_CONTEXT(ctx); + GLint i, j; + GLfloat u, du, v, dv, v1, u1; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + /* No effect if vertex maps disabled. + */ + if (!ctx->Eval.Map2Vertex4 && !ctx->Eval.Map2Vertex3) + return; + + + du = ctx->Eval.MapGrid2du; + dv = ctx->Eval.MapGrid2dv; + v1 = ctx->Eval.MapGrid2v1 + j1 * dv; + u1 = ctx->Eval.MapGrid2u1 + i1 * du; + + /* Need to turn off compilation -- this is already saved, and the + * coordinates generated and the test above depend on state that + * may change before the list is executed. + */ + { + GLboolean compiling = ctx->CompileFlag; + struct immediate *im = TNL_CURRENT_IM(ctx); + + if (compiling) { + FLUSH_VERTICES( ctx, 0 ); + SET_IMMEDIATE( ctx, _tnl_alloc_immediate( ctx ) ); + ctx->CompileFlag = GL_FALSE; + } + + switch (mode) { + case GL_POINT: + _tnl_begin( ctx, GL_POINTS ); + for (v=v1,j=j1;j<=j2;j++,v+=dv) { + for (u=u1,i=i1;i<=i2;i++,u+=du) { + _tnl_eval_coord2f( ctx, u, v ); + } + } + _tnl_end(ctx); + break; + case GL_LINE: + for (v=v1,j=j1;j<=j2;j++,v+=dv) { + _tnl_begin( ctx, GL_LINE_STRIP ); + for (u=u1,i=i1;i<=i2;i++,u+=du) { + _tnl_eval_coord2f( ctx, u, v ); + } + _tnl_end(ctx); + } + for (u=u1,i=i1;i<=i2;i++,u+=du) { + _tnl_begin( ctx, GL_LINE_STRIP ); + for (v=v1,j=j1;j<=j2;j++,v+=dv) { + _tnl_eval_coord2f( ctx, u, v ); + } + _tnl_end(ctx); + } + break; + case GL_FILL: + for (v=v1,j=j1;j<j2;j++,v+=dv) { + _tnl_begin( ctx, GL_TRIANGLE_STRIP ); + for (u=u1,i=i1;i<=i2;i++,u+=du) { + _tnl_eval_coord2f( ctx, u, v ); + _tnl_eval_coord2f( ctx, u, v+dv ); + } + _tnl_end(ctx); + } + break; + default: + gl_error( ctx, GL_INVALID_ENUM, "glEvalMesh2(mode)" ); + return; + } + + if (compiling) { + FLUSH_VERTICES( ctx, 0 ); + _tnl_free_immediate( TNL_CURRENT_IM( ctx ) ); + SET_IMMEDIATE( ctx, im ); + ctx->CompileFlag = GL_TRUE; + } + } +} + + + +void _tnl_eval_init( GLcontext *ctx ) +{ + GLvertexformat *vfmt = &(TNL_CONTEXT(ctx)->vtxfmt); + vfmt->EvalMesh1 = _tnl_exec_EvalMesh1; + vfmt->EvalMesh2 = _tnl_exec_EvalMesh2; +} |