src/gallium/drivers/llvmpipe/lp_rast.h

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   3  * Copyright 2009 VMware, Inc.
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  16  * of the Software.
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  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:
  65     *
  66     * First coefficient is position.
  67     *
  68     * FIXME: reduce memory waste!
  69     */
  70    float a0[1 + PIPE_MAX_SHADER_INPUTS][4];
  71    float dadx[1 + PIPE_MAX_SHADER_INPUTS][4];
  72    float dady[1 + PIPE_MAX_SHADER_INPUTS][4];
  73 };
  74
  75
  76 /* Rasterization information for a triangle known to be in this bin,
  77  * plus inputs to run the shader:
  78  */
  79 struct lp_rast_triangle {
  80    /* one-pixel sized trivial accept offsets for each plane */
  81    float ei1;
  82    float ei2;
  83    float ei3;
  84
  85    /* one-pixel sized trivial reject offsets for each plane */
  86    float eo1;
  87    float eo2;
  88    float eo3;
  89
  90    /* y deltas for vertex pairs */
  91    float dy12;
  92    float dy23;
  93    float dy31;
  94
  95    /* x deltas for vertex pairs */
  96    float dx12;
  97    float dx23;
  98    float dx31;
  99
 100    /* XXX: these are only used inside lp_setup_tri.c, don't really
 101     * need to bin them:
 102     */
 103    float oneoverarea;
 104
 105    /* inputs for the shader */
 106    struct lp_rast_shader_inputs inputs;
 107 };
 108
 109
 110
 111 struct lp_rasterizer *lp_rast_create( void );
 112
 113 void lp_rast_begin( struct lp_rasterizer *,
 114                     unsigned width,
 115                     unsigned height);
 116
 117 void lp_rast_bind_color( struct lp_rasterizer *,
 118                          struct pipe_surface *cbuf,
 119                          boolean write_when_done );
 120
 121 void lp_rast_bind_zstencil( struct lp_rasterizer *,
 122                             struct pipe_surface *zsbuf,
 123                             boolean write_when_done );
 124
 125 /* Begining of each tile:
 126  */
 127 void lp_rast_start_tile( struct lp_rasterizer *,
 128                          unsigned x,
 129                          unsigned y );
 130
 131
 132
 133 union lp_rast_cmd_arg {
 134    const struct lp_rast_shader_inputs *shade_tile;
 135    const struct lp_rast_triangle *triangle;
 136    const struct lp_rast_state *set_state;
 137    const uint8_t clear_color[4];
 138    unsigned clear_zstencil;
 139 };
 140
 141
 142 /* Binnable Commands:
 143  */
 144 void lp_rast_clear_color( struct lp_rasterizer *,
 145                           const union lp_rast_cmd_arg *);
 146
 147 void lp_rast_clear_zstencil( struct lp_rasterizer *,
 148                              const union lp_rast_cmd_arg *);
 149
 150 void lp_rast_load_color( struct lp_rasterizer *,
 151                          const union lp_rast_cmd_arg *);
 152
 153 void lp_rast_load_zstencil( struct lp_rasterizer *,
 154                             const union lp_rast_cmd_arg *);
 155
 156 void lp_rast_set_state( struct lp_rasterizer *,
 157                         const union lp_rast_cmd_arg * );
 158
 159 void lp_rast_triangle( struct lp_rasterizer *,
 160                        const union lp_rast_cmd_arg * );
 161
 162 void lp_rast_shade_tile( struct lp_rasterizer *,
 163                          const union lp_rast_cmd_arg *,
 164                          const struct lp_rast_shader_inputs *);
 165
 166
 167 /* End of tile:
 168  */
 169
 170 void lp_rast_end_tile( struct lp_rasterizer *rast );
 171
 172 /* Shutdown:
 173  */
 174 void lp_rast_destroy( struct lp_rasterizer * );
 175
 176
 177 #endif