1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
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11 * permit persons to whom the Software is furnished to do so, subject to
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14 * The above copyright notice and this permission notice (including the
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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
71 struct lp_fragment_shader_variant
*variant
;
76 * Coefficients necessary to run the shader at a given location.
77 * First coefficient is position.
78 * These pointers point into the bin data buffer.
80 struct lp_rast_shader_inputs
{
81 float facing
; /** Positive for front-facing, negative for back-facing */
87 /* edge/step info for 3 edges and 4x4 block of pixels */
88 PIPE_ALIGN_VAR(16) int step
[3][16];
91 struct lp_rast_clearzs
{
92 unsigned clearzs_value
;
93 unsigned clearzs_mask
;
98 * Rasterization information for a triangle known to be in this bin,
99 * plus inputs to run the shader:
100 * These fields are tile- and bin-independent.
101 * Objects of this type are put into the lp_setup_context::data buffer.
103 struct lp_rast_triangle
{
108 /* one-pixel sized trivial accept offsets for each plane */
113 /* one-pixel sized trivial reject offsets for each plane */
118 /* y deltas for vertex pairs (in fixed pt) */
123 /* x deltas for vertex pairs (in fixed pt) */
128 /* edge function values at minx,miny ?? */
131 /* inputs for the shader */
132 PIPE_ALIGN_VAR(16) struct lp_rast_shader_inputs inputs
;
137 struct lp_rasterizer
*
138 lp_rast_create( unsigned num_threads
);
141 lp_rast_destroy( struct lp_rasterizer
* );
144 lp_rast_get_num_threads( struct lp_rasterizer
* );
147 lp_rast_queue_scene( struct lp_rasterizer
*rast
,
148 struct lp_scene
*scene
);
151 lp_rast_finish( struct lp_rasterizer
*rast
);
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 const struct lp_rast_clearzs
*clear_zstencil
;
160 struct lp_fence
*fence
;
161 struct llvmpipe_query
*query_obj
;
165 /* Cast wrappers. Hopefully these compile to noops!
167 static INLINE
union lp_rast_cmd_arg
168 lp_rast_arg_inputs( const struct lp_rast_shader_inputs
*shade_tile
)
170 union lp_rast_cmd_arg arg
;
171 arg
.shade_tile
= shade_tile
;
175 static INLINE
union lp_rast_cmd_arg
176 lp_rast_arg_triangle( const struct lp_rast_triangle
*triangle
)
178 union lp_rast_cmd_arg arg
;
179 arg
.triangle
= triangle
;
183 static INLINE
union lp_rast_cmd_arg
184 lp_rast_arg_state( const struct lp_rast_state
*state
)
186 union lp_rast_cmd_arg arg
;
187 arg
.set_state
= state
;
191 static INLINE
union lp_rast_cmd_arg
192 lp_rast_arg_fence( struct lp_fence
*fence
)
194 union lp_rast_cmd_arg arg
;
200 static INLINE
union lp_rast_cmd_arg
201 lp_rast_arg_clearzs( const struct lp_rast_clearzs
*clearzs
)
203 union lp_rast_cmd_arg arg
;
204 arg
.clear_zstencil
= clearzs
;
208 static INLINE
union lp_rast_cmd_arg
209 lp_rast_arg_null( void )
211 union lp_rast_cmd_arg arg
;
212 arg
.set_state
= NULL
;
219 * These get put into bins by the setup code and are called when
220 * the bins are executed.
223 void lp_rast_clear_color( struct lp_rasterizer_task
*,
224 const union lp_rast_cmd_arg
);
226 void lp_rast_clear_zstencil( struct lp_rasterizer_task
*,
227 const union lp_rast_cmd_arg
);
229 void lp_rast_set_state( struct lp_rasterizer_task
*,
230 const union lp_rast_cmd_arg
);
232 void lp_rast_triangle( struct lp_rasterizer_task
*,
233 const union lp_rast_cmd_arg
);
235 void lp_rast_shade_tile( struct lp_rasterizer_task
*,
236 const union lp_rast_cmd_arg
);
238 void lp_rast_fence( struct lp_rasterizer_task
*,
239 const union lp_rast_cmd_arg
);
241 void lp_rast_store_color( struct lp_rasterizer_task
*,
242 const union lp_rast_cmd_arg
);
245 void lp_rast_begin_query(struct lp_rasterizer_task
*,
246 const union lp_rast_cmd_arg
);
248 void lp_rast_end_query(struct lp_rasterizer_task
*,
249 const union lp_rast_cmd_arg
);