1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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];
93 * Rasterization information for a triangle known to be in this bin,
94 * plus inputs to run the shader:
95 * These fields are tile- and bin-independent.
96 * Objects of this type are put into the lp_setup_context::data buffer.
98 struct lp_rast_triangle
{
103 /* one-pixel sized trivial accept offsets for each plane */
108 /* one-pixel sized trivial reject offsets for each plane */
113 /* y deltas for vertex pairs (in fixed pt) */
118 /* x deltas for vertex pairs (in fixed pt) */
123 /* edge function values at minx,miny ?? */
126 /* inputs for the shader */
127 PIPE_ALIGN_VAR(16) struct lp_rast_shader_inputs inputs
;
132 struct lp_rasterizer
*
133 lp_rast_create( unsigned num_threads
);
136 lp_rast_destroy( struct lp_rasterizer
* );
139 lp_rast_get_num_threads( struct lp_rasterizer
* );
142 lp_rast_queue_scene( struct lp_rasterizer
*rast
,
143 struct lp_scene
*scene
);
146 lp_rast_finish( struct lp_rasterizer
*rast
);
149 union lp_rast_cmd_arg
{
150 const struct lp_rast_shader_inputs
*shade_tile
;
151 const struct lp_rast_triangle
*triangle
;
152 const struct lp_rast_state
*set_state
;
153 uint8_t clear_color
[4];
154 unsigned clear_zstencil
;
155 struct lp_fence
*fence
;
156 struct llvmpipe_query
*query_obj
;
160 /* Cast wrappers. Hopefully these compile to noops!
162 static INLINE
union lp_rast_cmd_arg
163 lp_rast_arg_inputs( const struct lp_rast_shader_inputs
*shade_tile
)
165 union lp_rast_cmd_arg arg
;
166 arg
.shade_tile
= shade_tile
;
170 static INLINE
union lp_rast_cmd_arg
171 lp_rast_arg_triangle( const struct lp_rast_triangle
*triangle
)
173 union lp_rast_cmd_arg arg
;
174 arg
.triangle
= triangle
;
178 static INLINE
union lp_rast_cmd_arg
179 lp_rast_arg_state( const struct lp_rast_state
*state
)
181 union lp_rast_cmd_arg arg
;
182 arg
.set_state
= state
;
186 static INLINE
union lp_rast_cmd_arg
187 lp_rast_arg_fence( struct lp_fence
*fence
)
189 union lp_rast_cmd_arg arg
;
195 static INLINE
union lp_rast_cmd_arg
196 lp_rast_arg_null( void )
198 union lp_rast_cmd_arg arg
;
199 arg
.set_state
= NULL
;
207 * These get put into bins by the setup code and are called when
208 * the bins are executed.
211 void lp_rast_clear_color( struct lp_rasterizer_task
*,
212 const union lp_rast_cmd_arg
);
214 void lp_rast_clear_zstencil( struct lp_rasterizer_task
*,
215 const union lp_rast_cmd_arg
);
217 void lp_rast_set_state( struct lp_rasterizer_task
*,
218 const union lp_rast_cmd_arg
);
220 void lp_rast_triangle( struct lp_rasterizer_task
*,
221 const union lp_rast_cmd_arg
);
223 void lp_rast_shade_tile( struct lp_rasterizer_task
*,
224 const union lp_rast_cmd_arg
);
226 void lp_rast_fence( struct lp_rasterizer_task
*,
227 const union lp_rast_cmd_arg
);
229 void lp_rast_store_color( struct lp_rasterizer_task
*,
230 const union lp_rast_cmd_arg
);
233 void lp_rast_begin_query(struct lp_rasterizer_task
*,
234 const union lp_rast_cmd_arg
);
236 void lp_rast_end_query(struct lp_rasterizer_task
*,
237 const union lp_rast_cmd_arg
);