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3 * Copyright 2009 VMware, Inc.
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14 * The above copyright notice and this permission notice (including the
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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"
46 struct lp_scene_queue
;
51 /** For sub-pixel positioning */
53 #define FIXED_ONE (1<<FIXED_ORDER)
57 * Rasterization state.
58 * Objects of this type are put into the shared data bin and pointed
59 * to by commands in the per-tile bins.
61 struct lp_rast_state
{
62 /* State for the shader. This also contains state which feeds into
63 * the fragment shader, such as blend color and alpha ref value.
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:
69 * jit_function[0] skips the triangle in/out test code
70 * jit_function[1] does triangle in/out testing
72 lp_jit_frag_func jit_function
[2];
79 * Coefficients necessary to run the shader at a given location.
80 * First coefficient is position.
81 * These pointers point into the bin data buffer.
83 struct lp_rast_shader_inputs
{
88 /* edge/step info for 3 edges and 4x4 block of pixels */
89 PIPE_ALIGN_VAR(16) int step
[3][16];
94 * Rasterization information for a triangle known to be in this bin,
95 * plus inputs to run the shader:
96 * These fields are tile- and bin-independent.
97 * Objects of this type are put into the setup_context::data buffer.
99 struct lp_rast_triangle
{
100 /* one-pixel sized trivial accept offsets for each plane */
105 /* one-pixel sized trivial reject offsets for each plane */
110 /* y deltas for vertex pairs (in fixed pt) */
115 /* x deltas for vertex pairs (in fixed pt) */
120 /* edge function values at minx,miny ?? */
123 /* inputs for the shader */
124 PIPE_ALIGN_VAR(16) struct lp_rast_shader_inputs inputs
;
129 struct lp_rasterizer
*lp_rast_create( struct pipe_screen
*screen
,
130 struct lp_scene_queue
*empty
);
132 void lp_rast_destroy( struct lp_rasterizer
* );
134 unsigned lp_rast_get_num_threads( struct lp_rasterizer
* );
136 void lp_rasterize_scene( struct lp_rasterizer
*rast
,
137 struct lp_scene
*scene
,
138 const struct pipe_framebuffer_state
*fb
,
143 union lp_rast_cmd_arg
{
144 const struct lp_rast_shader_inputs
*shade_tile
;
145 const struct lp_rast_triangle
*triangle
;
146 const struct lp_rast_state
*set_state
;
147 uint8_t clear_color
[4];
148 unsigned clear_zstencil
;
149 struct lp_fence
*fence
;
153 /* Cast wrappers. Hopefully these compile to noops!
155 static INLINE
union lp_rast_cmd_arg
156 lp_rast_arg_inputs( const struct lp_rast_shader_inputs
*shade_tile
)
158 union lp_rast_cmd_arg arg
;
159 arg
.shade_tile
= shade_tile
;
163 static INLINE
union lp_rast_cmd_arg
164 lp_rast_arg_triangle( const struct lp_rast_triangle
*triangle
)
166 union lp_rast_cmd_arg arg
;
167 arg
.triangle
= triangle
;
171 static INLINE
union lp_rast_cmd_arg
172 lp_rast_arg_state( const struct lp_rast_state
*state
)
174 union lp_rast_cmd_arg arg
;
175 arg
.set_state
= state
;
179 static INLINE
union lp_rast_cmd_arg
180 lp_rast_arg_fence( struct lp_fence
*fence
)
182 union lp_rast_cmd_arg arg
;
188 static INLINE
union lp_rast_cmd_arg
189 lp_rast_arg_null( void )
191 union lp_rast_cmd_arg arg
;
192 arg
.set_state
= NULL
;
200 * These get put into bins by the setup code and are called when
201 * the bins are executed.
204 void lp_rast_clear_color( struct lp_rasterizer
*,
205 unsigned thread_index
,
206 const union lp_rast_cmd_arg
);
208 void lp_rast_clear_zstencil( struct lp_rasterizer
*,
209 unsigned thread_index
,
210 const union lp_rast_cmd_arg
);
212 void lp_rast_load_color( struct lp_rasterizer
*,
213 unsigned thread_index
,
214 const union lp_rast_cmd_arg
);
216 void lp_rast_set_state( struct lp_rasterizer
*,
217 unsigned thread_index
,
218 const union lp_rast_cmd_arg
);
220 void lp_rast_triangle( struct lp_rasterizer
*,
221 unsigned thread_index
,
222 const union lp_rast_cmd_arg
);
224 void lp_rast_shade_tile( struct lp_rasterizer
*,
225 unsigned thread_index
,
226 const union lp_rast_cmd_arg
);
228 void lp_rast_fence( struct lp_rasterizer
*,
229 unsigned thread_index
,
230 const union lp_rast_cmd_arg
);