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3 * Copyright 2009 VMware, Inc.
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26 **************************************************************************/
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"
49 /** For sub-pixel positioning */
51 #define FIXED_ONE (1<<FIXED_ORDER)
54 struct lp_rasterizer_task
;
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. This also contains state which feeds into
64 * the fragment shader, such as blend color and alpha ref value.
66 struct lp_jit_context jit_context
;
68 /* The shader itself. Probably we also need to pass a pointer to
69 * the tile color/z/stencil data somehow:
70 * jit_function[0] skips the triangle in/out test code
71 * jit_function[1] does triangle in/out testing
73 lp_jit_frag_func jit_function
[2];
80 * Coefficients necessary to run the shader at a given location.
81 * First coefficient is position.
82 * These pointers point into the bin data buffer.
84 struct lp_rast_shader_inputs
{
85 float facing
; /** Positive for front-facing, negative for back-facing */
91 /* edge/step info for 3 edges and 4x4 block of pixels */
92 PIPE_ALIGN_VAR(16) int step
[3][16];
97 * Rasterization information for a triangle known to be in this bin,
98 * plus inputs to run the shader:
99 * These fields are tile- and bin-independent.
100 * Objects of this type are put into the lp_setup_context::data buffer.
102 struct lp_rast_triangle
{
107 /* one-pixel sized trivial accept offsets for each plane */
112 /* one-pixel sized trivial reject offsets for each plane */
117 /* y deltas for vertex pairs (in fixed pt) */
122 /* x deltas for vertex pairs (in fixed pt) */
127 /* edge function values at minx,miny ?? */
130 /* inputs for the shader */
131 PIPE_ALIGN_VAR(16) struct lp_rast_shader_inputs inputs
;
136 struct lp_rasterizer
*
137 lp_rast_create( void );
140 lp_rast_destroy( struct lp_rasterizer
* );
143 lp_rast_get_num_threads( struct lp_rasterizer
* );
146 lp_rast_queue_scene( struct lp_rasterizer
*rast
,
147 struct lp_scene
*scene
);
150 lp_rast_finish( struct lp_rasterizer
*rast
);
153 union lp_rast_cmd_arg
{
154 const struct lp_rast_shader_inputs
*shade_tile
;
155 const struct lp_rast_triangle
*triangle
;
156 const struct lp_rast_state
*set_state
;
157 uint8_t clear_color
[4];
158 unsigned clear_zstencil
;
159 struct lp_fence
*fence
;
163 /* Cast wrappers. Hopefully these compile to noops!
165 static INLINE
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
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
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
union lp_rast_cmd_arg
190 lp_rast_arg_fence( struct lp_fence
*fence
)
192 union lp_rast_cmd_arg arg
;
198 static INLINE
union lp_rast_cmd_arg
199 lp_rast_arg_null( void )
201 union lp_rast_cmd_arg arg
;
202 arg
.set_state
= NULL
;
210 * These get put into bins by the setup code and are called when
211 * the bins are executed.
214 void lp_rast_clear_color( struct lp_rasterizer_task
*,
215 const union lp_rast_cmd_arg
);
217 void lp_rast_clear_zstencil( struct lp_rasterizer_task
*,
218 const union lp_rast_cmd_arg
);
220 void lp_rast_load_color( struct lp_rasterizer_task
*,
221 const union lp_rast_cmd_arg
);
223 void lp_rast_set_state( struct lp_rasterizer_task
*,
224 const union lp_rast_cmd_arg
);
226 void lp_rast_triangle( struct lp_rasterizer_task
*,
227 const union lp_rast_cmd_arg
);
229 void lp_rast_shade_tile( struct lp_rasterizer_task
*,
230 const union lp_rast_cmd_arg
);
232 void lp_rast_fence( struct lp_rasterizer_task
*,
233 const union lp_rast_cmd_arg
);