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
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   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
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  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,
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  22  * SOFTWARE.
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  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
  97 /** Max number of primitives per draw call */
  98 #define QSZ SVGA3D_MAX_DRAW_PRIMITIVE_RANGES
  99
 100 struct draw_cmd {
 101    struct svga_winsys_context *swc;
 102
 103    SVGA3dVertexDecl vdecl[SVGA3D_INPUTREG_MAX];
 104    struct pipe_resource *vdecl_vb[SVGA3D_INPUTREG_MAX];
 105    unsigned vdecl_count;
 106
 107    SVGA3dPrimitiveRange prim[QSZ];
 108    struct pipe_resource *prim_ib[QSZ];
 109    unsigned prim_count;
 110    unsigned min_index[QSZ];
 111    unsigned max_index[QSZ];
 112 };
 113
 114 #define IDX_CACHE_MAX  8
 115
 116 struct svga_hwtnl {
 117    struct svga_context *svga;
 118    struct u_upload_mgr *upload_ib;
 119
 120    /* Additional negative index bias due to partial buffer uploads
 121     * This is compensated for in the offset associated with all
 122     * vertex buffers.
 123     */
 124
 125    int index_bias;
 126
 127    /* Flatshade information:
 128     */
 129    unsigned api_pv;
 130    unsigned hw_pv;
 131    unsigned api_fillmode;
 132
 133    /* Cache the results of running a particular generate func on each
 134     * primitive type.
 135     */
 136    struct index_cache index_cache[PIPE_PRIM_MAX][IDX_CACHE_MAX];
 137
 138    /* Try to build the maximal draw command packet before emitting:
 139     */
 140    struct draw_cmd cmd;
 141 };
 142
 143
 144
 145 /***********************************************************************
 146  * Internal functions
 147  */
 148 enum pipe_error
 149 svga_hwtnl_prim( struct svga_hwtnl *hwtnl,
 150                  const SVGA3dPrimitiveRange *range,
 151                  unsigned min_index,
 152                  unsigned max_index,
 153                  struct pipe_resource *ib );
 154
 155 enum pipe_error
 156 svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
 157                                        struct pipe_resource *indexBuffer,
 158                                        unsigned index_size,
 159                                        int index_bias,
 160                                        unsigned min_index,
 161                                        unsigned max_index,
 162                                        unsigned prim,
 163                                        unsigned start,
 164                                        unsigned count );
 165
 166
 167 #endif