src/gallium/drivers/svga/svga_draw_private.h

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #ifndef SVGA_DRAW_H_
  27 #define SVGA_DRAW_H_
  28
  29 #include "pipe/p_compiler.h"
  30 #include "pipe/p_defines.h"
  31 #include "indices/u_indices.h"
  32 #include "svga_hw_reg.h"
  33 #include "svga3d_shaderdefs.h"
  34
  35 struct svga_context;
  36 struct u_upload_mgr;
  37
  38 /* Should include polygon?
  39  */
  40 static const unsigned svga_hw_prims =
  41    ((1 << PIPE_PRIM_POINTS) |
  42     (1 << PIPE_PRIM_LINES) |
  43     (1 << PIPE_PRIM_LINE_STRIP) |
  44     (1 << PIPE_PRIM_TRIANGLES) |
  45     (1 << PIPE_PRIM_TRIANGLE_STRIP) |
  46     (1 << PIPE_PRIM_TRIANGLE_FAN));
  47
  48
  49 static INLINE unsigned svga_translate_prim(unsigned mode,
  50                                            unsigned count,
  51                                            unsigned *out_count)
  52 {
  53    switch (mode) {
  54    case PIPE_PRIM_POINTS:
  55       *out_count = count;
  56       return SVGA3D_PRIMITIVE_POINTLIST;
  57
  58    case PIPE_PRIM_LINES:
  59       *out_count = count / 2;
  60       return SVGA3D_PRIMITIVE_LINELIST;
  61
  62    case PIPE_PRIM_LINE_STRIP:
  63       *out_count = count - 1;
  64       return SVGA3D_PRIMITIVE_LINESTRIP;
  65
  66    case PIPE_PRIM_TRIANGLES:
  67       *out_count = count / 3;
  68       return SVGA3D_PRIMITIVE_TRIANGLELIST;
  69
  70    case PIPE_PRIM_TRIANGLE_STRIP:
  71       *out_count = count - 2;
  72       return SVGA3D_PRIMITIVE_TRIANGLESTRIP;
  73
  74    case PIPE_PRIM_TRIANGLE_FAN:
  75       *out_count = count - 2;
  76       return SVGA3D_PRIMITIVE_TRIANGLEFAN;
  77
  78    default:
  79       assert(0);
  80       *out_count = 0;
  81       return 0;
  82    }
  83 }
  84
  85
  86 struct index_cache {
  87    u_generate_func generate;
  88    unsigned gen_nr;
  89
  90    /* If non-null, this buffer is filled by calling
  91     *   generate(nr, map(buffer))
  92     */
  93    struct pipe_resource *buffer;
  94 };
  95
  96 #define QSZ 32
  97
  98 struct draw_cmd {
  99    struct svga_winsys_context *swc;
 100
 101    SVGA3dVertexDecl vdecl[SVGA3D_INPUTREG_MAX];
 102    struct pipe_resource *vdecl_vb[SVGA3D_INPUTREG_MAX];
 103    unsigned vdecl_count;
 104
 105    SVGA3dPrimitiveRange prim[QSZ];
 106    struct pipe_resource *prim_ib[QSZ];
 107    unsigned prim_count;
 108    unsigned min_index[QSZ];
 109    unsigned max_index[QSZ];
 110 };
 111
 112 #define IDX_CACHE_MAX  8
 113
 114 struct svga_hwtnl {
 115    struct svga_context *svga;
 116    struct u_upload_mgr *upload_ib;
 117
 118    /* Flatshade information:
 119     */
 120    unsigned api_pv;
 121    unsigned hw_pv;
 122    unsigned api_fillmode;
 123
 124    /* Cache the results of running a particular generate func on each
 125     * primitive type.
 126     */
 127    struct index_cache index_cache[PIPE_PRIM_MAX][IDX_CACHE_MAX];
 128
 129    /* Try to build the maximal draw command packet before emitting:
 130     */
 131    struct draw_cmd cmd;
 132 };
 133
 134
 135
 136 /***********************************************************************
 137  * Internal functions
 138  */
 139 enum pipe_error
 140 svga_hwtnl_prim( struct svga_hwtnl *hwtnl,
 141                  const SVGA3dPrimitiveRange *range,
 142                  unsigned min_index,
 143                  unsigned max_index,
 144                  struct pipe_resource *ib );
 145
 146 enum pipe_error
 147 svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
 148                                        struct pipe_resource *indexBuffer,
 149                                        unsigned index_size,
 150                                        unsigned min_index,
 151                                        unsigned max_index,
 152                                        unsigned prim,
 153                                        unsigned start,
 154                                        unsigned count,
 155                                        unsigned bias );
 156
 157
 158 #endif