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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  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 struct pipe_screen;
  41
  42 #define FIXED_ORDER 4
  43 #define FIXED_ONE (1<<FIXED_ORDER)
  44 #define TILE_ORDER 6
  45 #define TILESIZE (1<<TILE_ORDER)
  46
  47
  48 struct lp_rast_state {
  49    /* State for the shader:
  50     */
  51    struct lp_jit_context jit_context;
  52
  53    /* The shader itself.  Probably we also need to pass a pointer to
  54     * the tile color/z/stencil data somehow:
  55     */
  56    lp_jit_frag_func jit_function;
  57
  58 };
  59
  60 /* Coefficients necessary to run the shader at a given location:
  61  */
  62 struct lp_rast_shader_inputs {
  63
  64    /* Current rasterizer state:
  65     */
  66    const struct lp_rast_state *state;
  67
  68    /* Attribute interpolation:
  69     *
  70     * First coefficient is position.
  71     *
  72     * FIXME: reduce memory waste!
  73     */
  74    float a0[1 + PIPE_MAX_SHADER_INPUTS][4];
  75    float dadx[1 + PIPE_MAX_SHADER_INPUTS][4];
  76    float dady[1 + PIPE_MAX_SHADER_INPUTS][4];
  77 };
  78
  79
  80 /* Rasterization information for a triangle known to be in this bin,
  81  * plus inputs to run the shader:
  82  */
  83 struct lp_rast_triangle {
  84    int minx;
  85    int maxx;
  86    int miny;
  87    int maxy;
  88
  89    /* one-pixel sized trivial accept offsets for each plane */
  90    int ei1;
  91    int ei2;
  92    int ei3;
  93
  94    /* one-pixel sized trivial reject offsets for each plane */
  95    int eo1;
  96    int eo2;
  97    int eo3;
  98
  99    /* y deltas for vertex pairs */
 100    int dy12;
 101    int dy23;
 102    int dy31;
 103
 104    /* x deltas for vertex pairs */
 105    int dx12;
 106    int dx23;
 107    int dx31;
 108
 109    /* edge function values at minx,miny ?? */
 110    int c1;
 111    int c2;
 112    int c3;
 113
 114    /* XXX: this is only used inside lp_setup_tri.c, don't really
 115     * need it here:
 116     */
 117    float oneoverarea;
 118
 119    /* inputs for the shader */
 120    struct lp_rast_shader_inputs inputs;
 121 };
 122
 123
 124
 125 struct lp_rasterizer *lp_rast_create( struct pipe_screen *screen );
 126
 127 boolean lp_rast_begin( struct lp_rasterizer *rast,
 128                        struct pipe_surface *cbuf,
 129                        struct pipe_surface *zsbuf,
 130                        boolean write_color,
 131                        boolean write_zstencil,
 132                        unsigned width,
 133                        unsigned height );
 134
 135 void lp_rast_end( struct lp_rasterizer * );
 136
 137 /* Begining of each tile:
 138  */
 139 void lp_rast_start_tile( struct lp_rasterizer *,
 140                          unsigned x,
 141                          unsigned y );
 142
 143
 144
 145 union lp_rast_cmd_arg {
 146    const struct lp_rast_shader_inputs *shade_tile;
 147    const struct lp_rast_triangle *triangle;
 148    const struct lp_rast_state *set_state;
 149    uint8_t clear_color[4];
 150    unsigned clear_zstencil;
 151 };
 152
 153 /* Cast wrappers.  Hopefully these compile to noops!
 154  */
 155 static INLINE const union lp_rast_cmd_arg
 156 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 157 {
 158    union lp_rast_cmd_arg arg;
 159    arg.shade_tile = shade_tile;
 160    return arg;
 161 }
 162
 163 static INLINE const union lp_rast_cmd_arg
 164 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle )
 165 {
 166    union lp_rast_cmd_arg arg;
 167    arg.triangle = triangle;
 168    return arg;
 169 }
 170
 171 static INLINE const union lp_rast_cmd_arg
 172 lp_rast_arg_state( const struct lp_rast_state *state )
 173 {
 174    union lp_rast_cmd_arg arg;
 175    arg.set_state = state;
 176    return arg;
 177 }
 178
 179 static INLINE const union lp_rast_cmd_arg
 180 lp_rast_arg_null( void )
 181 {
 182    union lp_rast_cmd_arg arg;
 183    arg.set_state = NULL;
 184    return arg;
 185 }
 186
 187
 188
 189
 190
 191 /* Binnable Commands:
 192  */
 193 void lp_rast_clear_color( struct lp_rasterizer *,
 194                           const union lp_rast_cmd_arg );
 195
 196 void lp_rast_clear_zstencil( struct lp_rasterizer *,
 197                              const union lp_rast_cmd_arg );
 198
 199 void lp_rast_load_color( struct lp_rasterizer *,
 200                          const union lp_rast_cmd_arg );
 201
 202 void lp_rast_load_zstencil( struct lp_rasterizer *,
 203                             const union lp_rast_cmd_arg );
 204
 205 void lp_rast_set_state( struct lp_rasterizer *,
 206                         const union lp_rast_cmd_arg );
 207
 208 void lp_rast_triangle( struct lp_rasterizer *,
 209                        const union lp_rast_cmd_arg );
 210
 211 void lp_rast_shade_tile( struct lp_rasterizer *,
 212                          const union lp_rast_cmd_arg );
 213
 214
 215 /* End of tile:
 216  */
 217
 218 void lp_rast_end_tile( struct lp_rasterizer *rast );
 219
 220 /* Shutdown:
 221  */
 222 void lp_rast_destroy( struct lp_rasterizer * );
 223
 224
 225 #endif