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/exec/tgsi_exec.h"
48 #include "tgsi/util/tgsi_scan.h"
53 struct gallivm_cpu_engine
;
54 struct draw_vertex_shader
;
62 * Carry some useful information around with the vertices in the prim pipe.
64 struct vertex_header
{
68 unsigned vertex_id
:16;
72 /* This will probably become float (*data)[4] soon:
77 /* NOTE: It should match vertex_id size above */
78 #define UNDEFINED_VERTEX_ID 0xffff
82 * Basic info for a point/line/triangle primitive.
85 float det
; /**< front/back face determinant */
86 unsigned reset_line_stipple
:1;
89 struct vertex_header
*v
[3]; /**< 1 to 3 vertex pointers */
96 #define PT_CLIPTEST 0x2
97 #define PT_PIPELINE 0x4
98 #define PT_MAX_MIDDLE 0x8
101 * Private context for the drawing module.
105 /** Drawing/primitive pipeline stages */
107 struct draw_stage
*first
; /**< one of the following */
109 struct draw_stage
*validate
;
111 /* stages (in logical order) */
112 struct draw_stage
*flatshade
;
113 struct draw_stage
*clip
;
114 struct draw_stage
*cull
;
115 struct draw_stage
*twoside
;
116 struct draw_stage
*offset
;
117 struct draw_stage
*unfilled
;
118 struct draw_stage
*stipple
;
119 struct draw_stage
*aapoint
;
120 struct draw_stage
*aaline
;
121 struct draw_stage
*pstipple
;
122 struct draw_stage
*wide_line
;
123 struct draw_stage
*wide_point
;
124 struct draw_stage
*rasterize
;
126 float wide_point_threshold
; /**< convert pnts to tris if larger than this */
127 float wide_line_threshold
; /**< convert lines to tris if wider than this */
128 boolean line_stipple
; /**< do line stipple? */
129 boolean point_sprite
; /**< convert points to quads for sprites? */
131 /* Temporary storage while the pipeline is being run:
134 unsigned vertex_stride
;
135 unsigned vertex_count
;
139 struct vbuf_render
*render
;
141 /* Support prototype passthrough path:
145 struct draw_pt_middle_end
*fetch_emit
;
146 struct draw_pt_middle_end
*general
;
150 struct draw_pt_front_end
*vcache
;
156 /* pipe state that we need: */
157 const struct pipe_rasterizer_state
*rasterizer
;
158 struct pipe_viewport_state viewport
;
160 struct pipe_vertex_buffer vertex_buffer
[PIPE_MAX_ATTRIBS
];
161 unsigned nr_vertex_buffers
;
163 struct pipe_vertex_element vertex_element
[PIPE_MAX_ATTRIBS
];
164 unsigned nr_vertex_elements
;
166 struct draw_vertex_shader
*vertex_shader
;
168 boolean identity_viewport
;
170 uint num_vs_outputs
; /**< convenience, from vertex_shader */
172 /* user-space vertex data, buffers */
174 const unsigned *edgeflag
;
176 /** vertex element/index buffer (ex: glDrawElements) */
178 /** bytes per index (0, 1, 2 or 4) */
182 const void *vbuffer
[PIPE_MAX_ATTRIBS
];
184 /** constant buffer (for vertex shader) */
185 const void *constants
;
188 /* Clip derived state:
195 /* If a prim stage introduces new vertex attributes, they'll be stored here
203 unsigned reduced_prim
;
205 /** TGSI program interpreter runtime state */
206 struct tgsi_exec_machine machine
;
208 /* This (and the tgsi_exec_machine struct) probably need to be moved somewhere private.
210 struct gallivm_cpu_engine
*engine
;
211 void *driver_private
;
217 extern void draw_reset_vertex_ids( struct draw_context
*draw
);
221 /*******************************************************************************
222 * Vertex processing (was passthrough) code:
224 boolean
draw_pt_init( struct draw_context
*draw
);
225 void draw_pt_destroy( struct draw_context
*draw
);
226 void draw_pt_reset_vertex_ids( struct draw_context
*draw
);
229 /*******************************************************************************
230 * Primitive processing (pipelnie) code:
233 boolean
draw_pipeline_init( struct draw_context
*draw
);
234 void draw_pipeline_destroy( struct draw_context
*draw
);
236 void draw_pipeline_run( struct draw_context
*draw
,
238 struct vertex_header
*vertices
,
239 unsigned vertex_count
,
244 boolean
draw_need_pipeline(const struct draw_context
*draw
,
248 /*******************************************************************************
252 #define DRAW_FLUSH_STATE_CHANGE 0x8
253 #define DRAW_FLUSH_BACKEND 0x10
256 void draw_do_flush( struct draw_context
*draw
, unsigned flags
);
258 boolean
draw_get_edgeflag( struct draw_context
*draw
,
264 #endif /* DRAW_PRIVATE_H */