src/gallium/drivers/llvmpipe/lp_rast.h

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  26  **************************************************************************/
  27
  28 #ifndef LP_RAST_H
  29 #define LP_RAST_H
  30
  31 #include "pipe/p_compiler.h"
  32 #include "lp_jit.h"
  33
  34 /* Initially create and program a single rasterizer directly.  Later
  35  * will want multiple of these, one or two per core.  At that stage
  36  * will probably pass command buffers into the rasterizers rather than
  37  * individual function calls like this.
  38  */
  39 struct lp_rasterizer;
  40
  41 #define TILESIZE 64
  42
  43
  44 struct lp_rast_state {
  45    /* State for the shader:
  46     */
  47    struct lp_jit_context jc;
  48
  49    /* The shader itself.  Probably we also need to pass a pointer to
  50     * the tile color/z/stencil data somehow:
  51     */
  52    lp_jit_frag_func shader;
  53
  54 };
  55
  56 /* Coefficients necessary to run the shader at a given location:
  57  */
  58 struct lp_rast_shader_inputs {
  59
  60    /* Current rasterizer state:
  61     */
  62    const struct lp_rast_state *state;
  63
  64    /* Attribute interpolation:  FIXME: reduce memory waste!
  65     */
  66    float a0[PIPE_MAX_ATTRIBS][4];
  67    float dadx[PIPE_MAX_ATTRIBS][4];
  68    float dady[PIPE_MAX_ATTRIBS][4];
  69 };
  70
  71
  72 /* Rasterization information for a triangle known to be in this bin,
  73  * plus inputs to run the shader:
  74  */
  75 struct lp_rast_triangle {
  76    /* one-pixel sized trivial accept offsets for each plane */
  77    float ei1;
  78    float ei2;
  79    float ei3;
  80
  81    /* one-pixel sized trivial reject offsets for each plane */
  82    float eo1;
  83    float eo2;
  84    float eo3;
  85
  86    /* y deltas for vertex pairs */
  87    float dy12;
  88    float dy23;
  89    float dy31;
  90
  91    /* x deltas for vertex pairs */
  92    float dx12;
  93    float dx23;
  94    float dx31;
  95
  96    /* inputs for the shader */
  97    struct lp_rast_shader_inputs *inputs;
  98 };
  99
 100 struct clear_tile {
 101    boolean do_color;
 102    boolean do_depth_stencil;
 103    unsigned rgba;
 104    unsigned depth_stencil;
 105 };
 106
 107 struct load_tile {
 108    boolean do_color;
 109    boolean do_depth_stencil;
 110 };
 111
 112
 113 struct lp_rasterizer *lp_rast_create( void );
 114
 115 void lp_rast_bind_surfaces( struct lp_rasterizer *,
 116                             struct pipe_surface *cbuf,
 117                             struct pipe_surface *zsbuf,
 118                             const float *clear_color,
 119                             double clear_depth,
 120                             unsigned clear_stencil);
 121
 122 /* Begining of each tile:
 123  */
 124 void lp_rast_start_tile( struct lp_rasterizer *,
 125                          unsigned x,
 126                          unsigned y );
 127
 128
 129
 130 union lp_rast_cmd_arg {
 131    const struct lp_rast_shader_inputs *shade_tile;
 132    const struct lp_rast_triangle *triangle;
 133    const struct lp_rast_state *set_state;
 134    const uint8_t clear_color[4];
 135    unsigned clear_zstencil;
 136 };
 137
 138
 139 /* Binnable Commands:
 140  */
 141 void lp_rast_clear_color( struct lp_rasterizer *,
 142                           const union lp_rast_cmd_arg *);
 143
 144 void lp_rast_clear_zstencil( struct lp_rasterizer *,
 145                              const union lp_rast_cmd_arg *);
 146
 147 void lp_rast_load_color( struct lp_rasterizer *,
 148                          const union lp_rast_cmd_arg *);
 149
 150 void lp_rast_load_zstencil( struct lp_rasterizer *,
 151                             const union lp_rast_cmd_arg *);
 152
 153 void lp_rast_set_state( struct lp_rasterizer *,
 154                         const union lp_rast_cmd_arg * );
 155
 156 void lp_rast_triangle( struct lp_rasterizer *,
 157                        const union lp_rast_cmd_arg * );
 158
 159 void lp_rast_shade_tile( struct lp_rasterizer *,
 160                          const union lp_rast_cmd_arg *,
 161                          const struct lp_rast_shader_inputs *);
 162
 163 void lp_rast_store_color( struct lp_rasterizer *,
 164                           const union lp_rast_cmd_arg *);
 165
 166 void lp_rast_store_zstencil( struct lp_rasterizer *,
 167                              const union lp_rast_cmd_arg *);
 168
 169
 170 /* End of tile:
 171  */
 172
 173 void lp_rast_end_tile( struct lp_rasterizer *rast,
 174                        boolean write_depth );
 175
 176 /* Shutdown:
 177  */
 178 void lp_rast_destroy( struct lp_rasterizer * );
 179
 180
 181 #endif