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      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
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     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 
     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
    168