2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keithw@vmware.com>
28 #include "main/glheader.h"
29 #include "main/imports.h"
30 #include "main/macros.h"
32 #include "tnl/t_context.h"
33 #include "tnl/t_pipeline.h"
34 #include "tnl/t_vertex.h"
35 #include "swrast_setup.h"
36 #include "ss_context.h"
37 #include "ss_triangle.h"
40 /* Need to check lighting state and vertex program state to know
41 * if two-sided lighting is in effect.
43 #define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT|_NEW_PROGRAM)
46 #define VARYING_EMIT_STYLE EMIT_4F
50 _swsetup_CreateContext( struct gl_context
*ctx
)
52 SScontext
*swsetup
= calloc(1, sizeof(SScontext
));
57 ctx
->swsetup_context
= swsetup
;
59 swsetup
->NewState
= ~0;
60 _swsetup_trifuncs_init( ctx
);
62 _tnl_init_vertices( ctx
, ctx
->Const
.MaxArrayLockSize
+ 12,
70 _swsetup_DestroyContext( struct gl_context
*ctx
)
72 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
76 ctx
->swsetup_context
= 0;
79 _tnl_free_vertices( ctx
);
83 _swsetup_RenderPrimitive( struct gl_context
*ctx
, GLenum mode
)
85 SWSETUP_CONTEXT(ctx
)->render_prim
= mode
;
86 _swrast_render_primitive( ctx
, mode
);
91 * Helper macros for setup_vertex_format()
93 #define SWZ ((SWvertex *)0)
94 #define SWOffset(MEMBER) (((char *)&(SWZ->MEMBER)) - ((char *)SWZ))
96 #define EMIT_ATTR( ATTR, STYLE, MEMBER ) \
98 map[e].attrib = (ATTR); \
99 map[e].format = (STYLE); \
100 map[e].offset = SWOffset(MEMBER); \
106 * Tell the tnl module how to build SWvertex objects for swrast.
107 * We'll build the map[] array with that info and pass it to
108 * _tnl_install_attrs().
111 setup_vertex_format(struct gl_context
*ctx
)
113 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
114 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
115 GLboolean intColors
= !ctx
->FragmentProgram
._Current
116 && !ctx
->ATIFragmentShader
._Enabled
117 && ctx
->RenderMode
== GL_RENDER
118 && CHAN_TYPE
!= GL_FLOAT
;
120 if (intColors
!= swsetup
->intColors
||
121 tnl
->render_inputs_bitset
!= swsetup
->last_index_bitset
) {
122 GLbitfield64 index_bitset
= tnl
->render_inputs_bitset
;
123 struct tnl_attr_map map
[_TNL_ATTRIB_MAX
];
124 unsigned int i
, e
= 0;
126 swsetup
->intColors
= intColors
;
128 EMIT_ATTR( _TNL_ATTRIB_POS
, EMIT_4F_VIEWPORT
, attrib
[VARYING_SLOT_POS
] );
130 if (index_bitset
& BITFIELD64_BIT(_TNL_ATTRIB_COLOR0
)) {
131 if (swsetup
->intColors
)
132 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4CHAN_4F_RGBA
, color
);
134 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4F
, attrib
[VARYING_SLOT_COL0
]);
137 if (index_bitset
& BITFIELD64_BIT(_TNL_ATTRIB_COLOR1
)) {
138 EMIT_ATTR( _TNL_ATTRIB_COLOR1
, EMIT_4F
, attrib
[VARYING_SLOT_COL1
]);
141 if (index_bitset
& BITFIELD64_BIT(_TNL_ATTRIB_FOG
)) {
142 const GLint emit
= ctx
->FragmentProgram
._Current
? EMIT_4F
: EMIT_1F
;
143 EMIT_ATTR( _TNL_ATTRIB_FOG
, emit
, attrib
[VARYING_SLOT_FOGC
]);
146 if (index_bitset
& BITFIELD64_RANGE(_TNL_ATTRIB_TEX0
, _TNL_NUM_TEX
))
148 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
149 if (index_bitset
& BITFIELD64_BIT(_TNL_ATTRIB_TEX(i
))) {
150 EMIT_ATTR( _TNL_ATTRIB_TEX(i
), EMIT_4F
,
151 attrib
[VARYING_SLOT_TEX0
+ i
] );
156 /* shader varying vars */
157 if (index_bitset
& BITFIELD64_RANGE(_TNL_ATTRIB_GENERIC0
, _TNL_NUM_GENERIC
)) {
158 for (i
= 0; i
< ctx
->Const
.MaxVarying
; i
++) {
159 if (index_bitset
& BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i
))) {
160 EMIT_ATTR( _TNL_ATTRIB_GENERIC(i
), VARYING_EMIT_STYLE
,
161 attrib
[VARYING_SLOT_VAR0
+ i
] );
166 if (index_bitset
& BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE
))
167 EMIT_ATTR( _TNL_ATTRIB_POINTSIZE
, EMIT_1F
, pointSize
);
169 _tnl_install_attrs( ctx
, map
, e
,
173 swsetup
->last_index_bitset
= index_bitset
;
179 * Prepare to render a vertex buffer.
180 * Called via tnl->Driver.Render.Start.
183 _swsetup_RenderStart( struct gl_context
*ctx
)
185 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
186 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
187 struct vertex_buffer
*VB
= &tnl
->vb
;
189 if (swsetup
->NewState
& _SWSETUP_NEW_RENDERINDEX
) {
190 _swsetup_choose_trifuncs(ctx
);
193 if (swsetup
->NewState
& _NEW_PROGRAM
) {
194 swsetup
->last_index_bitset
= 0;
197 swsetup
->NewState
= 0;
199 /* This will change if drawing unfilled tris */
200 _swrast_SetFacing(ctx
, 0);
202 _swrast_render_start(ctx
);
205 VB
->AttribPtr
[VERT_ATTRIB_POS
] = VB
->NdcPtr
;
207 setup_vertex_format(ctx
);
212 * We patch this function into tnl->Driver.Render.Finish.
213 * It's called when we finish rendering a vertex buffer.
216 _swsetup_RenderFinish( struct gl_context
*ctx
)
218 _swrast_render_finish( ctx
);
222 _swsetup_InvalidateState( struct gl_context
*ctx
, GLuint new_state
)
224 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
225 swsetup
->NewState
|= new_state
;
226 _tnl_invalidate_vertex_state( ctx
, new_state
);
231 _swsetup_Wakeup( struct gl_context
*ctx
)
233 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
234 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
236 tnl
->Driver
.Render
.Start
= _swsetup_RenderStart
;
237 tnl
->Driver
.Render
.Finish
= _swsetup_RenderFinish
;
238 tnl
->Driver
.Render
.PrimitiveNotify
= _swsetup_RenderPrimitive
;
239 tnl
->Driver
.Render
.Interp
= _tnl_interp
;
240 tnl
->Driver
.Render
.CopyPV
= _tnl_copy_pv
;
241 tnl
->Driver
.Render
.ClippedPolygon
= _tnl_RenderClippedPolygon
; /* new */
242 tnl
->Driver
.Render
.ClippedLine
= _tnl_RenderClippedLine
; /* new */
247 tnl
->Driver
.Render
.PrimTabVerts
= _tnl_render_tab_verts
;
248 tnl
->Driver
.Render
.PrimTabElts
= _tnl_render_tab_elts
;
249 tnl
->Driver
.Render
.ResetLineStipple
= _swrast_ResetLineStipple
;
250 tnl
->Driver
.Render
.BuildVertices
= _tnl_build_vertices
;
251 tnl
->Driver
.Render
.Multipass
= 0;
253 _tnl_invalidate_vertices( ctx
, ~0 );
254 _tnl_need_projected_coords( ctx
, GL_TRUE
);
255 _swsetup_InvalidateState( ctx
, ~0 );
257 swsetup
->verts
= (SWvertex
*)tnl
->clipspace
.vertex_buf
;
258 swsetup
->last_index_bitset
= 0;
263 * Populate a swrast SWvertex from an attrib-style vertex.
266 _swsetup_Translate( struct gl_context
*ctx
, const void *vertex
, SWvertex
*dest
)
268 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
269 const GLfloat
*m
= tnl
->_WindowMap
.m
;
273 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POS
, tmp
);
275 dest
->attrib
[VARYING_SLOT_POS
][0] = m
[0] * tmp
[0] + m
[12];
276 dest
->attrib
[VARYING_SLOT_POS
][1] = m
[5] * tmp
[1] + m
[13];
277 dest
->attrib
[VARYING_SLOT_POS
][2] = m
[10] * tmp
[2] + m
[14];
278 dest
->attrib
[VARYING_SLOT_POS
][3] = tmp
[3];
280 /** XXX try to limit these loops someday */
281 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
282 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_TEX0
+ i
,
283 dest
->attrib
[VARYING_SLOT_TEX0
+ i
] );
285 for (i
= 0 ; i
< ctx
->Const
.MaxVarying
; i
++)
286 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_GENERIC0
+ i
,
287 dest
->attrib
[VARYING_SLOT_VAR0
+ i
] );
289 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR0
,
290 dest
->attrib
[VARYING_SLOT_COL0
] );
292 UNCLAMPED_FLOAT_TO_RGBA_CHAN(dest
->color
, dest
->attrib
[VARYING_SLOT_COL0
]);
294 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR1
,
295 dest
->attrib
[VARYING_SLOT_COL1
]);
297 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_FOG
, tmp
);
298 dest
->attrib
[VARYING_SLOT_FOGC
][0] = tmp
[0];
300 /* XXX See _tnl_get_attr about pointsize ... */
301 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POINTSIZE
, tmp
);
302 dest
->pointSize
= tmp
[0];