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143 giacomo 1 
/* $Id: ss_context.c,v 1.1 2003-04-29 12:46:51 giacomo Exp $ */
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/*
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 * Mesa 3-D graphics library
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 * Version:  4.1
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 *
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 * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included
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 * in all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 *
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 * Authors:
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 *    Keith Whitwell <keith@tungstengraphics.com>
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 */
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#include "glheader.h"
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#include "imports.h"
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#include "ss_context.h"
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#include "ss_triangle.h"
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#include "ss_vb.h"
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#include "swrast_setup.h"
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#include "tnl/tnl.h"
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#include "tnl/t_context.h"
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#include "tnl/t_pipeline.h"
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#define _SWSETUP_NEW_VERTS (_NEW_RENDERMODE|    \
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                            _NEW_POLYGON|       \
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                            _NEW_LIGHT|         \
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                            _NEW_TEXTURE|       \
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                            _NEW_COLOR|         \
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                            _NEW_FOG|           \
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                            _NEW_POINT)
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#define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT)
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GLboolean
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_swsetup_CreateContext( GLcontext *ctx )
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{
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   TNLcontext *tnl = TNL_CONTEXT(ctx);
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   SScontext *swsetup = (SScontext *)CALLOC(sizeof(SScontext));
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   if (!swsetup)
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      return GL_FALSE;
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   swsetup->verts = (SWvertex *) ALIGN_CALLOC( sizeof(SWvertex) * tnl->vb.Size,
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                                               32);
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   if (!swsetup->verts) {
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      FREE(swsetup);
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      return GL_FALSE;
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   }
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   ctx->swsetup_context = swsetup;
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   swsetup->NewState = ~0;
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   _swsetup_vb_init( ctx );
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   _swsetup_trifuncs_init( ctx );
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   return GL_TRUE;
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}
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void
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_swsetup_DestroyContext( GLcontext *ctx )
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{
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   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
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   if (swsetup) {
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      if (swsetup->verts)
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         ALIGN_FREE(swsetup->verts);
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      if (swsetup->ChanSecondaryColor.Ptr)
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         ALIGN_FREE(swsetup->ChanSecondaryColor.Ptr);
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      if (swsetup->ChanColor.Ptr)
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         ALIGN_FREE(swsetup->ChanColor.Ptr);
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      FREE(swsetup);
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      ctx->swsetup_context = 0;
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   }
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}
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static void
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_swsetup_RenderPrimitive( GLcontext *ctx, GLenum mode )
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{
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   SWSETUP_CONTEXT(ctx)->render_prim = mode;
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   _swrast_render_primitive( ctx, mode );
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}
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/*
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 * We patch this function into tnl->Driver.Render.Start.
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 * It's called when we start rendering a vertex buffer.
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 */
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static void
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_swsetup_RenderStart( GLcontext *ctx )
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{
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   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
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   GLuint new_state = swsetup->NewState;
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   if (new_state & _SWSETUP_NEW_RENDERINDEX) {
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      _swsetup_choose_trifuncs( ctx );
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   }
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   if (new_state & _SWSETUP_NEW_VERTS) {
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      _swsetup_choose_rastersetup_func( ctx );
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   }
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   swsetup->NewState = 0;
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   _swrast_render_start( ctx );
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}
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/*
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 * We patch this function into tnl->Driver.Render.Finish.
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 * It's called when we finish rendering a vertex buffer.
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 */
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static void
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_swsetup_RenderFinish( GLcontext *ctx )
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{
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   _swrast_render_finish( ctx );
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}
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void
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_swsetup_InvalidateState( GLcontext *ctx, GLuint new_state )
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{
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   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
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   swsetup->NewState |= new_state;
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}
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void
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_swsetup_Wakeup( GLcontext *ctx )
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{
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   TNLcontext *tnl = TNL_CONTEXT(ctx);
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   tnl->Driver.Render.Start = _swsetup_RenderStart;
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   tnl->Driver.Render.Finish = _swsetup_RenderFinish;
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   tnl->Driver.Render.PrimitiveNotify = _swsetup_RenderPrimitive;
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   /* interp */
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   /* copypv */
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   tnl->Driver.Render.ClippedPolygon = _tnl_RenderClippedPolygon; /* new */
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   tnl->Driver.Render.ClippedLine = _tnl_RenderClippedLine; /* new */
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   /* points */
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   /* line */
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   /* triangle */
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   /* quad */
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   tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
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   tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
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   tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
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   /* buildvertices */
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   tnl->Driver.Render.Multipass = 0;
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   _tnl_need_projected_coords( ctx, GL_TRUE );
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   _swsetup_InvalidateState( ctx, ~0 );
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}