src/gallium/drivers/llvmpipe/lp_setup.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * \brief  Primitive rasterization/rendering (points, lines)
  30  *
  31  * \author  Keith Whitwell <keith@tungstengraphics.com>
  32  * \author  Brian Paul
  33  */
  34
  35 #include "lp_context.h"
  36 #include "lp_quad.h"
  37 #include "lp_quad_pipe.h"
  38 #include "lp_setup.h"
  39 #include "lp_state.h"
  40 #include "draw/draw_context.h"
  41 #include "draw/draw_private.h"
  42 #include "draw/draw_vertex.h"
  43 #include "pipe/p_shader_tokens.h"
  44 #include "pipe/p_thread.h"
  45 #include "util/u_math.h"
  46 #include "util/u_memory.h"
  47
  48
  49 #define DEBUG_VERTS 0
  50
  51 /* Stubs for lines & points for now:
  52  */
  53 void
  54 llvmpipe_setup_point(struct setup_context *setup,
  55                      const float (*v0)[4])
  56 {
  57 }
  58
  59 void
  60 llvmpipe_setup_line(struct setup_context *setup,
  61                     const float (*v0)[4],
  62                     const float (*v1)[4])
  63 {
  64 }
  65
  66
  67 /* Called after statechange, before emitting primitives.  If binning
  68  * is active, this function should store relevant state in the binning
  69  * context.
  70  *
  71  * That includes:
  72  *    - current fragment shader function
  73  *    - bound constant buffer contents
  74  *    - bound textures
  75  *    - blend color
  76  *    - etc.
  77  *
  78  * Basically everything needed at some point in the future to
  79  * rasterize triangles for the current state.
  80  *
  81  * Additionally this will set up the state needed for the rasterizer
  82  * to process and bin incoming triangles.  That would include such
  83  * things as:
  84  *    - cull mode
  85  *    - ???
  86  *    - etc.
  87  *
  88  */
  89 void setup_prepare( struct setup_context *setup )
  90 {
  91    struct llvmpipe_context *lp = setup->llvmpipe;
  92
  93    if (lp->dirty) {
  94       llvmpipe_update_derived(lp);
  95    }
  96
  97    lp->quad.first->begin( lp->quad.first );
  98
  99    if (lp->reduced_api_prim == PIPE_PRIM_TRIANGLES &&
 100        lp->rasterizer->fill_cw == PIPE_POLYGON_MODE_FILL &&
 101        lp->rasterizer->fill_ccw == PIPE_POLYGON_MODE_FILL) {
 102       /* we'll do culling */
 103       setup->winding = lp->rasterizer->cull_mode;
 104    }
 105    else {
 106       /* 'draw' will do culling */
 107       setup->winding = PIPE_WINDING_NONE;
 108    }
 109
 110    setup_prepare_tri( setup->llvmpipe );
 111 }
 112
 113
 114
 115 void setup_destroy_context( struct setup_context *setup )
 116 {
 117    FREE( setup );
 118 }
 119
 120
 121 /**
 122  * Create a new primitive setup/render stage.
 123  */
 124 struct setup_context *setup_create_context( struct llvmpipe_context *llvmpipe )
 125 {
 126    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 127    unsigned i;
 128
 129    setup->llvmpipe = llvmpipe;
 130
 131    return setup;
 132 }
 133