src/mesa/swrast_setup/ss_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.0.1
   4  *
   5  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include "glheader.h"
  29 #include "imports.h"
  30 #include "colormac.h"
  31 #include "ss_context.h"
  32 #include "ss_triangle.h"
  33 #include "swrast_setup.h"
  34 #include "tnl/tnl.h"
  35 #include "tnl/t_context.h"
  36 #include "tnl/t_pipeline.h"
  37 #include "tnl/t_vertex.h"
  38
  39 /* Need to check lighting state and vertex program state to know
  40  * if two-sided lighting is in effect.
  41  */
  42 #define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT|_NEW_PROGRAM)
  43
  44
  45 GLboolean
  46 _swsetup_CreateContext( GLcontext *ctx )
  47 {
  48    SScontext *swsetup = (SScontext *)CALLOC(sizeof(SScontext));
  49
  50    if (!swsetup)
  51       return GL_FALSE;
  52
  53    ctx->swsetup_context = swsetup;
  54
  55    swsetup->NewState = ~0;
  56    _swsetup_trifuncs_init( ctx );
  57
  58    _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12,
  59                        sizeof(SWvertex) );
  60
  61
  62    return GL_TRUE;
  63 }
  64
  65 void
  66 _swsetup_DestroyContext( GLcontext *ctx )
  67 {
  68    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
  69
  70    if (swsetup) {
  71       FREE(swsetup);
  72       ctx->swsetup_context = 0;
  73    }
  74
  75    _tnl_free_vertices( ctx );
  76 }
  77
  78 static void
  79 _swsetup_RenderPrimitive( GLcontext *ctx, GLenum mode )
  80 {
  81    SWSETUP_CONTEXT(ctx)->render_prim = mode;
  82    _swrast_render_primitive( ctx, mode );
  83 }
  84
  85 #define SWZ ((SWvertex *)0)
  86 #define SWOffset(MEMBER) (((char *)&(SWZ->MEMBER)) - ((char *)SWZ))
  87
  88 #define EMIT_ATTR( ATTR, STYLE, MEMBER )        \
  89 do {                                            \
  90    map[e].attrib = (ATTR);                      \
  91    map[e].format = (STYLE);                     \
  92    map[e].offset = SWOffset(MEMBER);            \
  93    e++;                                         \
  94 } while (0)
  95
  96
  97 /*
  98  * We patch this function into tnl->Driver.Render.Start.
  99  * It's called when we start rendering a vertex buffer.
 100  */
 101 static void
 102 _swsetup_RenderStart( GLcontext *ctx )
 103 {
 104    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 105    TNLcontext *tnl = TNL_CONTEXT(ctx);
 106    struct vertex_buffer *VB = &tnl->vb;
 107    GLuint new_state = swsetup->NewState;
 108
 109    if (new_state & _SWSETUP_NEW_RENDERINDEX) {
 110       _swsetup_choose_trifuncs( ctx );
 111    }
 112
 113    swsetup->NewState = 0;
 114
 115    _swrast_render_start( ctx );
 116
 117    /* Important:
 118     */
 119    VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
 120
 121
 122    if (tnl->render_inputs != swsetup->last_index) {
 123       GLuint index = tnl->render_inputs;
 124       struct tnl_attr_map map[_TNL_ATTRIB_MAX];
 125       int i, e = 0;
 126
 127       EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, win );
 128
 129       if (index & _TNL_BIT_COLOR0)
 130          EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4CHAN_4F_RGBA, color );
 131
 132       if (index & _TNL_BIT_COLOR1)
 133          EMIT_ATTR( _TNL_ATTRIB_COLOR1, EMIT_4CHAN_4F_RGBA, specular);
 134
 135       if (index & _TNL_BIT_FOG)
 136          EMIT_ATTR( _TNL_ATTRIB_FOG, EMIT_1F, fog);
 137
 138       if (index & _TNL_BITS_TEX_ANY) {
 139          for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
 140             if (index & _TNL_BIT_TEX(i)) {
 141                EMIT_ATTR( _TNL_ATTRIB_TEX0+i, EMIT_4F, texcoord[i] );
 142             }
 143          }
 144       }
 145
 146       if (index & _TNL_BIT_INDEX)
 147          EMIT_ATTR( _TNL_ATTRIB_INDEX, EMIT_1F, index );
 148
 149       if (index & _TNL_BIT_POINTSIZE)
 150          EMIT_ATTR( _TNL_ATTRIB_POINTSIZE, EMIT_1F, pointSize );
 151
 152       _tnl_install_attrs( ctx, map, e,
 153                           ctx->Viewport._WindowMap.m,
 154                           sizeof(SWvertex) );
 155
 156       swsetup->last_index = index;
 157    }
 158
 159 }
 160
 161 /*
 162  * We patch this function into tnl->Driver.Render.Finish.
 163  * It's called when we finish rendering a vertex buffer.
 164  */
 165 static void
 166 _swsetup_RenderFinish( GLcontext *ctx )
 167 {
 168    _swrast_render_finish( ctx );
 169 }
 170
 171 void
 172 _swsetup_InvalidateState( GLcontext *ctx, GLuint new_state )
 173 {
 174    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 175    swsetup->NewState |= new_state;
 176    _tnl_invalidate_vertex_state( ctx, new_state );
 177 }
 178
 179
 180 void
 181 _swsetup_Wakeup( GLcontext *ctx )
 182 {
 183    TNLcontext *tnl = TNL_CONTEXT(ctx);
 184    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 185
 186    tnl->Driver.Render.Start = _swsetup_RenderStart;
 187    tnl->Driver.Render.Finish = _swsetup_RenderFinish;
 188    tnl->Driver.Render.PrimitiveNotify = _swsetup_RenderPrimitive;
 189    tnl->Driver.Render.Interp = _tnl_interp;
 190    tnl->Driver.Render.CopyPV = _tnl_copy_pv;
 191    tnl->Driver.Render.ClippedPolygon = _tnl_RenderClippedPolygon; /* new */
 192    tnl->Driver.Render.ClippedLine = _tnl_RenderClippedLine; /* new */
 193    /* points */
 194    /* line */
 195    /* triangle */
 196    /* quad */
 197    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 198    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 199    tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
 200    tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
 201    tnl->Driver.Render.Multipass = 0;
 202
 203    _tnl_invalidate_vertices( ctx, ~0 );
 204    _tnl_need_projected_coords( ctx, GL_TRUE );
 205    _swsetup_InvalidateState( ctx, ~0 );
 206
 207    swsetup->verts = (SWvertex *)tnl->clipspace.vertex_buf;
 208    swsetup->last_index = 0;
 209 }
 210
 211
 212
 213
 214
 215 /* Populate a swrast SWvertex from an attrib-style vertex.
 216  */
 217 void
 218 _swsetup_Translate( GLcontext *ctx, const void *vertex, SWvertex *dest )
 219 {
 220    const GLfloat *m = ctx->Viewport._WindowMap.m;
 221    GLfloat tmp[4];
 222    GLuint i;
 223
 224    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_POS, tmp );
 225
 226    dest->win[0] = m[0]  * tmp[0] + m[12];
 227    dest->win[1] = m[5]  * tmp[1] + m[13];
 228    dest->win[2] = m[10] * tmp[2] + m[15];
 229    dest->win[3] =         tmp[3];
 230
 231
 232    for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
 233       _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_TEX0+i, dest->texcoord[i] );
 234
 235    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR0, tmp );
 236    UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->color, tmp );
 237
 238    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR1, tmp );
 239    UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->specular, tmp );
 240
 241    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_FOG, tmp );
 242    dest->fog = tmp[0];
 243
 244    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_INDEX, tmp );
 245    dest->index = (GLuint) tmp[0];
 246
 247    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_POINTSIZE, tmp );
 248    dest->pointSize = tmp[0];
 249 }
 250