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