reactos/dll/opengl/mesa/swrast_setup/ss_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2007  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 "main/glheader.h"
  29 #include "main/imports.h"
  30 #include "main/colormac.h"
  31 #include "tnl/tnl.h"
  32 #include "tnl/t_context.h"
  33 #include "tnl/t_pipeline.h"
  34 #include "tnl/t_vertex.h"
  35 #include "swrast_setup.h"
  36 #include "ss_context.h"
  37 #include "ss_triangle.h"
  38
  39
  40 /* Need to check lighting state and vertex program state to know
  41  * if two-sided lighting is in effect.
  42  */
  43 #define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT)
  44
  45
  46 #define VARYING_EMIT_STYLE  EMIT_4F
  47
  48
  49 GLboolean
  50 _swsetup_CreateContext( struct gl_context *ctx )
  51 {
  52    SScontext *swsetup = (SScontext *)CALLOC(sizeof(SScontext));
  53
  54    if (!swsetup)
  55       return GL_FALSE;
  56
  57    ctx->swsetup_context = swsetup;
  58
  59    swsetup->NewState = ~0;
  60    _swsetup_trifuncs_init( ctx );
  61
  62    _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12,
  63                        sizeof(SWvertex) );
  64
  65
  66    return GL_TRUE;
  67 }
  68
  69 void
  70 _swsetup_DestroyContext( struct gl_context *ctx )
  71 {
  72    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
  73
  74    if (swsetup) {
  75       FREE(swsetup);
  76       ctx->swsetup_context = 0;
  77    }
  78
  79    _tnl_free_vertices( ctx );
  80 }
  81
  82 static void
  83 _swsetup_RenderPrimitive( struct gl_context *ctx, GLenum mode )
  84 {
  85    SWSETUP_CONTEXT(ctx)->render_prim = mode;
  86    _swrast_render_primitive( ctx, mode );
  87 }
  88
  89
  90 /**
  91  * Helper macros for setup_vertex_format()
  92  */
  93 #define SWZ ((SWvertex *)0)
  94 #define SWOffset(MEMBER) (((char *)&(SWZ->MEMBER)) - ((char *)SWZ))
  95
  96 #define EMIT_ATTR( ATTR, STYLE, MEMBER )        \
  97 do {                                            \
  98    map[e].attrib = (ATTR);                      \
  99    map[e].format = (STYLE);                     \
 100    map[e].offset = SWOffset(MEMBER);            \
 101    e++;                                         \
 102 } while (0)
 103
 104
 105 /**
 106  * Tell the tnl module how to build SWvertex objects for swrast.
 107  * We'll build the map[] array with that info and pass it to
 108  * _tnl_install_attrs().
 109  */
 110 static void
 111 setup_vertex_format(struct gl_context *ctx)
 112 {
 113    TNLcontext *tnl = TNL_CONTEXT(ctx);
 114    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 115    GLboolean intColors = ctx->RenderMode == GL_RENDER
 116                       && CHAN_TYPE != GL_FLOAT;
 117
 118    if (intColors != swsetup->intColors ||
 119        tnl->render_inputs_bitset != swsetup->last_index_bitset) {
 120       GLbitfield64 index_bitset = tnl->render_inputs_bitset;
 121       struct tnl_attr_map map[_TNL_ATTRIB_MAX];
 122       unsigned e = 0;
 123
 124       swsetup->intColors = intColors;
 125
 126       EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, attrib[FRAG_ATTRIB_WPOS] );
 127
 128       if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_COLOR)) {
 129          if (swsetup->intColors)
 130             EMIT_ATTR( _TNL_ATTRIB_COLOR, EMIT_4CHAN_4F_RGBA, color );
 131          else
 132             EMIT_ATTR( _TNL_ATTRIB_COLOR, EMIT_4F, attrib[FRAG_ATTRIB_COL]);
 133       }
 134
 135       if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_FOG)) {
 136          EMIT_ATTR( _TNL_ATTRIB_FOG, EMIT_1F, attrib[FRAG_ATTRIB_FOGC]);
 137       }
 138
 139       if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_TEX)) {
 140          EMIT_ATTR( _TNL_ATTRIB_TEX, EMIT_4F,
 141                     attrib[FRAG_ATTRIB_TEX] );
 142       }
 143
 144       if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE))
 145          EMIT_ATTR( _TNL_ATTRIB_POINTSIZE, EMIT_1F, pointSize );
 146
 147       _tnl_install_attrs( ctx, map, e,
 148                           ctx->Viewport._WindowMap.m,
 149                           sizeof(SWvertex) );
 150
 151       swsetup->last_index_bitset = index_bitset;
 152    }
 153 }
 154
 155
 156 /**
 157  * Prepare to render a vertex buffer.
 158  * Called via tnl->Driver.Render.Start.
 159  */
 160 static void
 161 _swsetup_RenderStart( struct gl_context *ctx )
 162 {
 163    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 164    TNLcontext *tnl = TNL_CONTEXT(ctx);
 165    struct vertex_buffer *VB = &tnl->vb;
 166
 167    if (swsetup->NewState & _SWSETUP_NEW_RENDERINDEX) {
 168       _swsetup_choose_trifuncs(ctx);
 169    }
 170
 171    swsetup->NewState = 0;
 172
 173    _swrast_render_start(ctx);
 174
 175    /* Important */
 176    VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
 177
 178    setup_vertex_format(ctx);
 179 }
 180
 181
 182 /*
 183  * We patch this function into tnl->Driver.Render.Finish.
 184  * It's called when we finish rendering a vertex buffer.
 185  */
 186 static void
 187 _swsetup_RenderFinish( struct gl_context *ctx )
 188 {
 189    _swrast_render_finish( ctx );
 190 }
 191
 192 void
 193 _swsetup_InvalidateState( struct gl_context *ctx, GLuint new_state )
 194 {
 195    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 196    swsetup->NewState |= new_state;
 197    _tnl_invalidate_vertex_state( ctx, new_state );
 198 }
 199
 200
 201 void
 202 _swsetup_Wakeup( struct gl_context *ctx )
 203 {
 204    TNLcontext *tnl = TNL_CONTEXT(ctx);
 205    SScontext *swsetup = SWSETUP_CONTEXT(ctx);
 206
 207    tnl->Driver.Render.Start = _swsetup_RenderStart;
 208    tnl->Driver.Render.Finish = _swsetup_RenderFinish;
 209    tnl->Driver.Render.PrimitiveNotify = _swsetup_RenderPrimitive;
 210    tnl->Driver.Render.Interp = _tnl_interp;
 211    tnl->Driver.Render.CopyPV = _tnl_copy_pv;
 212    tnl->Driver.Render.ClippedPolygon = _tnl_RenderClippedPolygon; /* new */
 213    tnl->Driver.Render.ClippedLine = _tnl_RenderClippedLine; /* new */
 214    /* points */
 215    /* line */
 216    /* triangle */
 217    /* quad */
 218    tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 219    tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 220    tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
 221    tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
 222    tnl->Driver.Render.Multipass = 0;
 223
 224    _tnl_invalidate_vertices( ctx, ~0 );
 225    _tnl_need_projected_coords( ctx, GL_TRUE );
 226    _swsetup_InvalidateState( ctx, ~0 );
 227
 228    swsetup->verts = (SWvertex *)tnl->clipspace.vertex_buf;
 229    swsetup->last_index_bitset = 0;
 230 }