src/gallium/drivers/llvmpipe/lp_rast.h

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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 struct pipe_screen;
  41
  42 #define FIXED_ORDER 4
  43 #define FIXED_ONE (1<<FIXED_ORDER)
  44
  45
  46 struct lp_rast_state {
  47    /* State for the shader:
  48     */
  49    struct lp_jit_context jit_context;
  50
  51    /* The shader itself.  Probably we also need to pass a pointer to
  52     * the tile color/z/stencil data somehow:
  53     */
  54    lp_jit_frag_func jit_function;
  55
  56 };
  57
  58 /* Coefficients necessary to run the shader at a given location:
  59  */
  60 struct lp_rast_shader_inputs {
  61
  62    /* Current rasterizer state:
  63     */
  64    const struct lp_rast_state *state;
  65
  66    /* Attribute interpolation:
  67     *
  68     * First coefficient is position.
  69     *
  70     * FIXME: reduce memory waste!
  71     */
  72    float a0[1 + PIPE_MAX_SHADER_INPUTS][4];
  73    float dadx[1 + PIPE_MAX_SHADER_INPUTS][4];
  74    float dady[1 + PIPE_MAX_SHADER_INPUTS][4];
  75 };
  76
  77
  78 /**
  79  * Rasterization information for a triangle known to be in this bin,
  80  * plus inputs to run the shader:
  81  * These fields are tile- and bin-independent.
  82  * Objects of this type are put into the setup_context::data buffer.
  83  */
  84 struct lp_rast_triangle {
  85    /* bounding box of tri (in pixels) */
  86    int minx;
  87    int maxx;
  88    int miny;
  89    int maxy;
  90
  91    /* one-pixel sized trivial accept offsets for each plane */
  92    int ei1;
  93    int ei2;
  94    int ei3;
  95
  96    /* one-pixel sized trivial reject offsets for each plane */
  97    int eo1;
  98    int eo2;
  99    int eo3;
 100
 101    /* y deltas for vertex pairs (in fixed pt) */
 102    int dy12;
 103    int dy23;
 104    int dy31;
 105
 106    /* x deltas for vertex pairs (in fixed pt) */
 107    int dx12;
 108    int dx23;
 109    int dx31;
 110
 111    /* edge function values at minx,miny ?? */
 112    int c1;
 113    int c2;
 114    int c3;
 115
 116    int step[3][16];
 117
 118    /* XXX: this is only used inside lp_setup_tri.c, don't really
 119     * need it here:
 120     */
 121    float oneoverarea;
 122
 123    /* inputs for the shader */
 124    struct lp_rast_shader_inputs inputs;
 125 };
 126
 127
 128
 129 struct lp_rasterizer *lp_rast_create( struct pipe_screen *screen );
 130
 131 boolean lp_rast_begin( struct lp_rasterizer *rast,
 132                        struct pipe_surface *cbuf,
 133                        struct pipe_surface *zsbuf,
 134                        boolean write_color,
 135                        boolean write_zstencil,
 136                        unsigned width,
 137                        unsigned height );
 138
 139 void lp_rast_end( struct lp_rasterizer * );
 140
 141 /* Begining of each tile:
 142  */
 143 void lp_rast_start_tile( struct lp_rasterizer *,
 144                          unsigned x,
 145                          unsigned y );
 146
 147
 148
 149 union lp_rast_cmd_arg {
 150    const struct lp_rast_shader_inputs *shade_tile;
 151    const struct lp_rast_triangle *triangle;
 152    const struct lp_rast_state *set_state;
 153    uint8_t clear_color[4];
 154    unsigned clear_zstencil;
 155 };
 156
 157 /* Cast wrappers.  Hopefully these compile to noops!
 158  */
 159 static INLINE const union lp_rast_cmd_arg
 160 lp_rast_arg_inputs( const struct lp_rast_shader_inputs *shade_tile )
 161 {
 162    union lp_rast_cmd_arg arg;
 163    arg.shade_tile = shade_tile;
 164    return arg;
 165 }
 166
 167 static INLINE const union lp_rast_cmd_arg
 168 lp_rast_arg_triangle( const struct lp_rast_triangle *triangle )
 169 {
 170    union lp_rast_cmd_arg arg;
 171    arg.triangle = triangle;
 172    return arg;
 173 }
 174
 175 static INLINE const union lp_rast_cmd_arg
 176 lp_rast_arg_state( const struct lp_rast_state *state )
 177 {
 178    union lp_rast_cmd_arg arg;
 179    arg.set_state = state;
 180    return arg;
 181 }
 182
 183 static INLINE const union lp_rast_cmd_arg
 184 lp_rast_arg_null( void )
 185 {
 186    union lp_rast_cmd_arg arg;
 187    arg.set_state = NULL;
 188    return arg;
 189 }
 190
 191
 192
 193
 194
 195 /* Binnable Commands:
 196  */
 197 void lp_rast_clear_color( struct lp_rasterizer *,
 198                           const union lp_rast_cmd_arg );
 199
 200 void lp_rast_clear_zstencil( struct lp_rasterizer *,
 201                              const union lp_rast_cmd_arg );
 202
 203 void lp_rast_load_color( struct lp_rasterizer *,
 204                          const union lp_rast_cmd_arg );
 205
 206 void lp_rast_load_zstencil( struct lp_rasterizer *,
 207                             const union lp_rast_cmd_arg );
 208
 209 void lp_rast_set_state( struct lp_rasterizer *,
 210                         const union lp_rast_cmd_arg );
 211
 212 void lp_rast_triangle( struct lp_rasterizer *,
 213                        const union lp_rast_cmd_arg );
 214
 215 void lp_rast_shade_tile( struct lp_rasterizer *,
 216                          const union lp_rast_cmd_arg );
 217
 218
 219 /* End of tile:
 220  */
 221
 222 void lp_rast_end_tile( struct lp_rasterizer *rast );
 223
 224 /* Shutdown:
 225  */
 226 void lp_rast_destroy( struct lp_rasterizer * );
 227
 228
 229 #endif