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/* Initially create and program a single rasterizer directly. Later
* will want multiple of these, one or two per core. At that stage
* will probably pass command buffers into the rasterizers rather than
* individual function calls like this.
*/
struct lp_rasterizer;
struct lp_rast_state {
/* State:
*/
struct lp_jit_context jc;
/* Shader itself:
*/
};
/* Coefficients necessary to run the shader at a given location:
*/
struct lp_rast_shader_inputs {
/* Current rasterizer state:
*/
const struct lp_rast_state *state;
/* Attribute interpolation:
*/
float oneoverarea;
float x1;
float y1;
struct tgsi_interp_coef position_coef;
struct tgsi_interp_coef *coef;
};
/* Rasterization information for a triangle known to be in this bin,
* plus inputs to run the shader:
*/
struct lp_rast_triangle {
/* one-pixel sized trivial accept offsets for each plane */
float ei1;
float ei2;
float ei3;
/* one-pixel sized trivial reject offsets for each plane */
float eo1;
float eo2;
float eo3;
/* y deltas for vertex pairs */
float dy12;
float dy23;
float dy31;
/* x deltas for vertex pairs */
float dx12;
float dx23;
float dx31;
/* State to run the shader: */
struct lp_rast_shader_inputs inputs;
};
struct lp_rasterizer *lp_rast_create( void );
void lp_rast_bind_surfaces( struct lp_rasterizer *,
struct pipe_surface *color,
struct pipe_surface *zstencil,
const float *clear_color,
double clear_depth,
unsigned clear_stencil);
/* Begining of each tile:
*/
void lp_rast_start_tile( struct lp_rasterizer *,
unsigned x,
unsigned y );
void lp_rast_clear_color( struct lp_rasterizer * );
void lp_rast_clear_zstencil( struct lp_rasterizer * );
void lp_rast_load_color( struct lp_rasterizer * );
void lp_rast_load_zstencil( struct lp_rasterizer * );
/* Within a tile:
*/
void lp_rast_set_state( struct lp_rasterizer *,
const struct lp_rast_state * );
void lp_rast_triangle( struct lp_rasterizer *,
const struct lp_rast_triangle * );
void lp_rast_shade_tile( struct lp_rasterizer *,
const struct lp_rast_shader_inputs * );
/* End of tile:
*/
void lp_rast_store_color( struct lp_rasterizer * );
void lp_rast_store_zstencil( struct lp_rasterizer * );
/* Shutdown:
*/
void lp_rast_destroy( struct lp_rasterizer * );
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