1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 * Private data structures, etc for the draw module.
35 * Keith Whitwell <keith@tungstengraphics.com>
40 #ifndef DRAW_PRIVATE_H
41 #define DRAW_PRIVATE_H
44 #include "pipe/p_state.h"
45 #include "pipe/p_defines.h"
47 #include "tgsi/tgsi_scan.h"
51 struct draw_vertex_shader
;
55 struct tgsi_exec_machine
;
61 * Carry some useful information around with the vertices in the prim pipe.
63 struct vertex_header
{
67 unsigned vertex_id
:16;
71 /* This will probably become float (*data)[4] soon:
76 /* NOTE: It should match vertex_id size above */
77 #define UNDEFINED_VERTEX_ID 0xffff
81 * Private context for the drawing module.
85 /** Drawing/primitive pipeline stages */
87 struct draw_stage
*first
; /**< one of the following */
89 struct draw_stage
*validate
;
91 /* stages (in logical order) */
92 struct draw_stage
*flatshade
;
93 struct draw_stage
*clip
;
94 struct draw_stage
*cull
;
95 struct draw_stage
*twoside
;
96 struct draw_stage
*offset
;
97 struct draw_stage
*unfilled
;
98 struct draw_stage
*stipple
;
99 struct draw_stage
*aapoint
;
100 struct draw_stage
*aaline
;
101 struct draw_stage
*pstipple
;
102 struct draw_stage
*wide_line
;
103 struct draw_stage
*wide_point
;
104 struct draw_stage
*rasterize
;
106 float wide_point_threshold
; /**< convert pnts to tris if larger than this */
107 float wide_line_threshold
; /**< convert lines to tris if wider than this */
108 boolean line_stipple
; /**< do line stipple? */
109 boolean point_sprite
; /**< convert points to quads for sprites? */
111 /* Temporary storage while the pipeline is being run:
114 unsigned vertex_stride
;
115 unsigned vertex_count
;
119 struct vbuf_render
*render
;
121 /* Support prototype passthrough path:
125 struct draw_pt_middle_end
*fetch_emit
;
126 struct draw_pt_middle_end
*fetch_shade_emit
;
127 struct draw_pt_middle_end
*general
;
131 struct draw_pt_front_end
*vcache
;
132 struct draw_pt_front_end
*varray
;
135 struct pipe_vertex_buffer vertex_buffer
[PIPE_MAX_ATTRIBS
];
136 unsigned nr_vertex_buffers
;
138 struct pipe_vertex_element vertex_element
[PIPE_MAX_ATTRIBS
];
139 unsigned nr_vertex_elements
;
141 /* user-space vertex data, buffers */
143 /** vertex element/index buffer (ex: glDrawElements) */
145 /** bytes per index (0, 1, 2 or 4) */
151 const void *vbuffer
[PIPE_MAX_ATTRIBS
];
153 /** constant buffer (for vertex/geometry shader) */
154 const void *vs_constants
[PIPE_MAX_CONSTANT_BUFFERS
];
155 const void *gs_constants
[PIPE_MAX_CONSTANT_BUFFERS
];
158 boolean test_fse
; /* enable FSE even though its not correct (eg for softpipe) */
159 boolean no_fse
; /* disable FSE even when it is correct */
163 boolean bypass_clipping
;
167 boolean flushing
; /**< debugging/sanity */
168 boolean suspend_flushing
; /**< internally set */
169 boolean bypass_clipping
; /**< set if either api or driver bypass_clipping true */
171 boolean force_passthrough
; /**< never clip or shade */
175 double mrd
; /**< minimum resolvable depth value, for polygon offset */
177 /* pipe state that we need: */
178 const struct pipe_rasterizer_state
*rasterizer
;
179 struct pipe_viewport_state viewport
;
180 boolean identity_viewport
;
183 struct draw_vertex_shader
*vertex_shader
;
184 uint num_vs_outputs
; /**< convenience, from vertex_shader */
185 uint position_output
;
186 uint edgeflag_output
;
188 /** TGSI program interpreter runtime state */
189 struct tgsi_exec_machine
*machine
;
192 struct tgsi_sampler
**samplers
;
194 /* Here's another one:
196 struct aos_machine
*aos_machine
;
199 const void *aligned_constants
[PIPE_MAX_CONSTANT_BUFFERS
];
201 const void *aligned_constant_storage
[PIPE_MAX_CONSTANT_BUFFERS
];
202 unsigned const_storage_size
[PIPE_MAX_CONSTANT_BUFFERS
];
205 struct translate
*fetch
;
206 struct translate_cache
*fetch_cache
;
207 struct translate
*emit
;
208 struct translate_cache
*emit_cache
;
212 struct draw_geometry_shader
*geometry_shader
;
213 uint num_gs_outputs
; /**< convenience, from geometry_shader */
214 uint position_output
;
216 /** TGSI program interpreter runtime state */
217 struct tgsi_exec_machine
*machine
;
220 struct tgsi_sampler
**samplers
;
223 /* Clip derived state:
228 /* If a prim stage introduces new vertex attributes, they'll be stored here
234 } extra_shader_outputs
;
236 unsigned reduced_prim
;
238 unsigned instance_id
;
240 void *driver_private
;
244 /*******************************************************************************
245 * Vertex shader code:
247 boolean
draw_vs_init( struct draw_context
*draw
);
248 void draw_vs_destroy( struct draw_context
*draw
);
250 void draw_vs_set_viewport( struct draw_context
*,
251 const struct pipe_viewport_state
* );
254 draw_vs_set_constants(struct draw_context
*,
256 const void *constants
,
261 /*******************************************************************************
262 * Geometry shading code:
264 boolean
draw_gs_init( struct draw_context
*draw
);
267 draw_gs_set_constants(struct draw_context
*,
269 const void *constants
,
272 void draw_gs_destroy( struct draw_context
*draw
);
274 /*******************************************************************************
275 * Common shading code:
277 uint
draw_current_shader_outputs(const struct draw_context
*draw
);
278 uint
draw_current_shader_position_output(const struct draw_context
*draw
);
280 /*******************************************************************************
281 * Vertex processing (was passthrough) code:
283 boolean
draw_pt_init( struct draw_context
*draw
);
284 void draw_pt_destroy( struct draw_context
*draw
);
285 void draw_pt_reset_vertex_ids( struct draw_context
*draw
);
288 /*******************************************************************************
289 * Primitive processing (pipeline) code:
292 boolean
draw_pipeline_init( struct draw_context
*draw
);
293 void draw_pipeline_destroy( struct draw_context
*draw
);
299 /* We use the top few bits in the elts[] parameter to convey a little
300 * API information. This limits the number of vertices we can address
301 * to only 4096 -- if that becomes a problem, we can switch to 32-bit
304 * These flags expected at first vertex of lines & triangles when
305 * unfilled and/or line stipple modes are operational.
307 #define DRAW_PIPE_MAX_VERTICES (0x1<<12)
308 #define DRAW_PIPE_EDGE_FLAG_0 (0x1<<12)
309 #define DRAW_PIPE_EDGE_FLAG_1 (0x2<<12)
310 #define DRAW_PIPE_EDGE_FLAG_2 (0x4<<12)
311 #define DRAW_PIPE_EDGE_FLAG_ALL (0x7<<12)
312 #define DRAW_PIPE_RESET_STIPPLE (0x8<<12)
313 #define DRAW_PIPE_FLAG_MASK (0xf<<12)
315 void draw_pipeline_run( struct draw_context
*draw
,
317 struct vertex_header
*vertices
,
318 unsigned vertex_count
,
323 void draw_pipeline_run_linear( struct draw_context
*draw
,
325 struct vertex_header
*vertices
,
331 void draw_pipeline_flush( struct draw_context
*draw
,
336 /*******************************************************************************
340 #define DRAW_FLUSH_STATE_CHANGE 0x8
341 #define DRAW_FLUSH_BACKEND 0x10
344 void draw_do_flush( struct draw_context
*draw
, unsigned flags
);
349 #endif /* DRAW_PRIVATE_H */