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29 * The rast code is concerned with rasterization of command bins.
30 * Each screen tile has a bin associated with it. To render the
31 * scene we iterate over the tile bins and execute the commands
33 * We'll do that with multiple threads...
40 #include "pipe/p_compiler.h"
44 /* Initially create and program a single rasterizer directly. Later
45 * will want multiple of these, one or two per core. At that stage
46 * will probably pass command buffers into the rasterizers rather than
47 * individual function calls like this.
54 #define FIXED_ONE (1<<FIXED_ORDER)
58 * Rasterization state.
59 * Objects of this type are put into the shared data bin and pointed
60 * to by commands in the per-tile bins.
62 struct lp_rast_state
{
63 /* State for the shader:
65 struct lp_jit_context jit_context
;
67 /* The shader itself. Probably we also need to pass a pointer to
68 * the tile color/z/stencil data somehow:
70 lp_jit_frag_func jit_function
;
75 * Coefficients necessary to run the shader at a given location.
76 * First coefficient is position.
77 * These pointers point into the bin data buffer.
79 struct lp_rast_shader_inputs
{
87 * Rasterization information for a triangle known to be in this bin,
88 * plus inputs to run the shader:
89 * These fields are tile- and bin-independent.
90 * Objects of this type are put into the setup_context::data buffer.
92 struct lp_rast_triangle
{
93 /* bounding box of tri (in pixels) */
99 /* one-pixel sized trivial accept offsets for each plane */
104 /* one-pixel sized trivial reject offsets for each plane */
109 /* y deltas for vertex pairs (in fixed pt) */
114 /* x deltas for vertex pairs (in fixed pt) */
119 /* edge function values at minx,miny ?? */
126 /* inputs for the shader */
127 struct lp_rast_shader_inputs inputs
;
132 struct lp_rasterizer
*lp_rast_create( struct pipe_screen
*screen
);
134 void lp_rast_destroy( struct lp_rasterizer
* );
137 boolean
lp_rast_begin( struct lp_rasterizer
*rast
,
138 struct pipe_surface
*cbuf
,
139 struct pipe_surface
*zsbuf
,
141 boolean write_zstencil
,
146 lp_rasterize_bin( struct lp_rasterizer
*rast
,
147 const struct cmd_bin
*bin
,
151 void lp_rast_end( struct lp_rasterizer
* );
154 union lp_rast_cmd_arg
{
155 const struct lp_rast_shader_inputs
*shade_tile
;
156 const struct lp_rast_triangle
*triangle
;
157 const struct lp_rast_state
*set_state
;
158 uint8_t clear_color
[4];
159 unsigned clear_zstencil
;
163 /* Cast wrappers. Hopefully these compile to noops!
165 static INLINE
const union lp_rast_cmd_arg
166 lp_rast_arg_inputs( const struct lp_rast_shader_inputs
*shade_tile
)
168 union lp_rast_cmd_arg arg
;
169 arg
.shade_tile
= shade_tile
;
173 static INLINE
const union lp_rast_cmd_arg
174 lp_rast_arg_triangle( const struct lp_rast_triangle
*triangle
)
176 union lp_rast_cmd_arg arg
;
177 arg
.triangle
= triangle
;
181 static INLINE
const union lp_rast_cmd_arg
182 lp_rast_arg_state( const struct lp_rast_state
*state
)
184 union lp_rast_cmd_arg arg
;
185 arg
.set_state
= state
;
189 static INLINE
const union lp_rast_cmd_arg
190 lp_rast_arg_null( void )
192 union lp_rast_cmd_arg arg
;
193 arg
.set_state
= NULL
;
201 * These get put into bins by the setup code and are called when
202 * the bins are executed.
205 void lp_rast_clear_color( struct lp_rasterizer
*,
206 const union lp_rast_cmd_arg
);
208 void lp_rast_clear_zstencil( struct lp_rasterizer
*,
209 const union lp_rast_cmd_arg
);
211 void lp_rast_load_color( struct lp_rasterizer
*,
212 const union lp_rast_cmd_arg
);
214 void lp_rast_load_zstencil( struct lp_rasterizer
*,
215 const union lp_rast_cmd_arg
);
217 void lp_rast_set_state( struct lp_rasterizer
*,
218 const union lp_rast_cmd_arg
);
220 void lp_rast_triangle( struct lp_rasterizer
*,
221 const union lp_rast_cmd_arg
);
223 void lp_rast_shade_tile( struct lp_rasterizer
*,
224 const union lp_rast_cmd_arg
);