src/mesa/swrast_setup/ss_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2006  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 #define VARYING_EMIT_STYLE  EMIT_4F
  46
  47
  48 GLboolean
  49 _swsetup_CreateContext( GLcontext *ctx )
  50 {
  51    SScontext *swsetup = (SScontext *)CALLOC(sizeof(SScontext));
  52
  53    if (!swsetup)
  54       return GL_FALSE;
  55
  56    ctx->swsetup_context = swsetup;
  57
  58    swsetup->NewState = ~0;
  59    _swsetup_trifuncs_init( ctx );
  60
  61    _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12,
  62                        sizeof(SWvertex) );
  63
  64
  65    return GL_TRUE;
  66 }
  67
  68 void
  69 _swsetup_DestroyContext( GLcontext *ctx )
  70 {
  71    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
  72
  73    if (swsetup) {
  74       FREE(swsetup);
  75       ctx->swsetup_context = 0;
  76    }
  77
  78    _tnl_free_vertices( ctx );
  79 }
  80
  81 static void
  82 _swsetup_RenderPrimitive( GLcontext *ctx, GLenum mode )
  83 {
  84    SWSETUP_CONTEXT(ctx)->render_prim = mode;
  85    _swrast_render_primitive( ctx, mode );
  86 }
  87
  88 #define SWZ ((SWvertex *)0)
  89 #define SWOffset(MEMBER) (((char *)&(SWZ->MEMBER)) - ((char *)SWZ))
  90
  91 #define EMIT_ATTR( ATTR, STYLE, MEMBER )        \
  92 do {                                            \
  93    map[e].attrib = (ATTR);                      \
  94    map[e].format = (STYLE);                     \
  95    map[e].offset = SWOffset(MEMBER);            \
  96    e++;                                         \
  97 } while (0)
  98
  99 /*
 100  * We patch this function into tnl->Driver.Render.Start.
 101  * It's called when we start rendering a vertex buffer.
 102  */
 103 static void
 104 _swsetup_RenderStart( GLcontext *ctx )
 105 {
 106    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 107    TNLcontext *tnl = TNL_CONTEXT(ctx);
 108    struct vertex_buffer *VB = &tnl->vb;
 109    GLuint new_state = swsetup->NewState;
 110
 111    if (new_state & _SWSETUP_NEW_RENDERINDEX) {
 112       _swsetup_choose_trifuncs( ctx );
 113    }
 114
 115    swsetup->NewState = 0;
 116
 117    _swrast_render_start( ctx );
 118
 119    /* Important:
 120     */
 121    VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
 122
 123
 124    if (!RENDERINPUTS_EQUAL(tnl->render_inputs_bitset, swsetup->last_index_bitset)) {
 125       DECLARE_RENDERINPUTS(index_bitset);
 126       struct tnl_attr_map map[_TNL_ATTRIB_MAX];
 127       int i, e = 0;
 128
 129       RENDERINPUTS_COPY( index_bitset, tnl->render_inputs_bitset );
 130
 131       EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, win );
 132
 133       if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_COLOR0 ))
 134          EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4CHAN_4F_RGBA, color );
 135
 136       if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_COLOR1 ))
 137          EMIT_ATTR( _TNL_ATTRIB_COLOR1, EMIT_4CHAN_4F_RGBA, specular);
 138
 139       if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_COLOR_INDEX ))
 140          EMIT_ATTR( _TNL_ATTRIB_COLOR_INDEX, EMIT_1F, index );
 141
 142       if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_FOG ))
 143          EMIT_ATTR( _TNL_ATTRIB_FOG, EMIT_1F, fog);
 144
 145       if (RENDERINPUTS_TEST_RANGE( index_bitset, _TNL_FIRST_TEX, _TNL_LAST_TEX )) {
 146          for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
 147             if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_TEX(i) )) {
 148                EMIT_ATTR( _TNL_ATTRIB_TEX(i), EMIT_4F, texcoord[i] );
 149             }
 150          }
 151       }
 152
 153       /* shader varying vars */
 154       if (RENDERINPUTS_TEST_RANGE( index_bitset,
 155                                    _TNL_FIRST_GENERIC, _TNL_LAST_GENERIC )) {
 156          for (i = 0; i < ctx->Const.MaxVarying; i++) {
 157             if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_GENERIC(i) )) {
 158                EMIT_ATTR( _TNL_ATTRIB_GENERIC(i), VARYING_EMIT_STYLE,
 159                           attribute[i] );
 160             }
 161          }
 162       }
 163
 164       if (RENDERINPUTS_TEST( index_bitset, _TNL_ATTRIB_POINTSIZE ))
 165          EMIT_ATTR( _TNL_ATTRIB_POINTSIZE, EMIT_1F, pointSize );
 166
 167       _tnl_install_attrs( ctx, map, e,
 168                           ctx->Viewport._WindowMap.m,
 169                           sizeof(SWvertex) );
 170
 171       RENDERINPUTS_COPY( swsetup->last_index_bitset, index_bitset );
 172    }
 173 }
 174
 175 /*
 176  * We patch this function into tnl->Driver.Render.Finish.
 177  * It's called when we finish rendering a vertex buffer.
 178  */
 179 static void
 180 _swsetup_RenderFinish( GLcontext *ctx )
 181 {
 182    _swrast_render_finish( ctx );
 183 }
 184
 185 void
 186 _swsetup_InvalidateState( GLcontext *ctx, GLuint new_state )
 187 {
 188    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 189    swsetup->NewState |= new_state;
 190    _tnl_invalidate_vertex_state( ctx, new_state );
 191 }
 192
 193
 194 void
 195 _swsetup_Wakeup( GLcontext *ctx )
 196 {
 197    TNLcontext *tnl = TNL_CONTEXT(ctx);
 198    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 199
 200    tnl->Driver.Render.Start = _swsetup_RenderStart;
 201    tnl->Driver.Render.Finish = _swsetup_RenderFinish;
 202    tnl->Driver.Render.PrimitiveNotify = _swsetup_RenderPrimitive;
 203    tnl->Driver.Render.Interp = _tnl_interp;
 204    tnl->Driver.Render.CopyPV = _tnl_copy_pv;
 205    tnl->Driver.Render.ClippedPolygon = _tnl_RenderClippedPolygon; /* new */
 206    tnl->Driver.Render.ClippedLine = _tnl_RenderClippedLine; /* new */
 207    /* points */
 208    /* line */
 209    /* triangle */
 210    /* quad */
 211    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 212    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 213    tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
 214    tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
 215    tnl->Driver.Render.Multipass = 0;
 216
 217    _tnl_invalidate_vertices( ctx, ~0 );
 218    _tnl_need_projected_coords( ctx, GL_TRUE );
 219    _swsetup_InvalidateState( ctx, ~0 );
 220
 221    swsetup->verts = (SWvertex *)tnl->clipspace.vertex_buf;
 222    RENDERINPUTS_ZERO( swsetup->last_index_bitset );
 223 }
 224
 225
 226 /**
 227  * Populate a swrast SWvertex from an attrib-style vertex.
 228  */
 229 void
 230 _swsetup_Translate( GLcontext *ctx, const void *vertex, SWvertex *dest )
 231 {
 232    const GLfloat *m = ctx->Viewport._WindowMap.m;
 233    GLfloat tmp[4];
 234    GLuint i;
 235
 236    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_POS, tmp );
 237
 238    dest->win[0] = m[0]  * tmp[0] + m[12];
 239    dest->win[1] = m[5]  * tmp[1] + m[13];
 240    dest->win[2] = m[10] * tmp[2] + m[14];
 241    dest->win[3] =         tmp[3];
 242
 243
 244    for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
 245       _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_TEX0+i, dest->texcoord[i] );
 246
 247    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR0, tmp );
 248    UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->color, tmp );
 249
 250    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR1, tmp );
 251    UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->specular, tmp );
 252
 253    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_FOG, tmp );
 254    dest->fog = tmp[0];
 255
 256    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR_INDEX, tmp );
 257    dest->index = tmp[0];
 258
 259    _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_POINTSIZE, tmp );
 260    dest->pointSize = tmp[0];
 261 }
 262