2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keith@tungstengraphics.com>
31 #include "ss_context.h"
32 #include "ss_triangle.h"
33 #include "swrast_setup.h"
35 #include "tnl/t_context.h"
36 #include "tnl/t_pipeline.h"
37 #include "tnl/t_vertex.h"
39 /* Need to check lighting state and vertex program state to know
40 * if two-sided lighting is in effect.
42 #define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT|_NEW_PROGRAM)
45 #define VARYING_EMIT_STYLE EMIT_4F
49 _swsetup_CreateContext( GLcontext
*ctx
)
51 SScontext
*swsetup
= (SScontext
*)CALLOC(sizeof(SScontext
));
56 ctx
->swsetup_context
= swsetup
;
58 swsetup
->NewState
= ~0;
59 _swsetup_trifuncs_init( ctx
);
61 _tnl_init_vertices( ctx
, ctx
->Const
.MaxArrayLockSize
+ 12,
69 _swsetup_DestroyContext( GLcontext
*ctx
)
71 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
75 ctx
->swsetup_context
= 0;
78 _tnl_free_vertices( ctx
);
82 _swsetup_RenderPrimitive( GLcontext
*ctx
, GLenum mode
)
84 SWSETUP_CONTEXT(ctx
)->render_prim
= mode
;
85 _swrast_render_primitive( ctx
, mode
);
90 * Helper macros for setup_vertex_format()
92 #define SWZ ((SWvertex *)0)
93 #define SWOffset(MEMBER) (((char *)&(SWZ->MEMBER)) - ((char *)SWZ))
95 #define EMIT_ATTR( ATTR, STYLE, MEMBER ) \
97 map[e].attrib = (ATTR); \
98 map[e].format = (STYLE); \
99 map[e].offset = SWOffset(MEMBER); \
105 * Tell the tnl module how to build SWvertex objects for swrast.
106 * We'll build the map[] array with that info and pass it to
107 * _tnl_install_attrs().
110 setup_vertex_format(GLcontext
*ctx
)
112 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
113 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
115 if (!RENDERINPUTS_EQUAL(tnl
->render_inputs_bitset
,
116 swsetup
->last_index_bitset
)) {
117 DECLARE_RENDERINPUTS(index_bitset
);
118 struct tnl_attr_map map
[_TNL_ATTRIB_MAX
];
121 RENDERINPUTS_COPY( index_bitset
, tnl
->render_inputs_bitset
);
123 EMIT_ATTR( _TNL_ATTRIB_POS
, EMIT_4F_VIEWPORT
, attrib
[FRAG_ATTRIB_WPOS
] );
125 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR0
)) {
126 swsetup
->intColors
= !ctx
->FragmentProgram
._Current
127 && !ctx
->ATIFragmentShader
._Enabled
128 && ctx
->RenderMode
== GL_RENDER
129 && CHAN_TYPE
== GL_UNSIGNED_BYTE
;
130 if (swsetup
->intColors
)
131 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4CHAN_4F_RGBA
, color
);
133 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4F
, attrib
[FRAG_ATTRIB_COL0
]);
136 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR1
)) {
137 EMIT_ATTR( _TNL_ATTRIB_COLOR1
, EMIT_4F
, attrib
[FRAG_ATTRIB_COL1
]);
140 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR_INDEX
)) {
141 EMIT_ATTR( _TNL_ATTRIB_COLOR_INDEX
, EMIT_1F
,
142 attrib
[FRAG_ATTRIB_CI
][0] );
145 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_FOG
)) {
146 const GLint emit
= ctx
->FragmentProgram
._Current
? EMIT_4F
: EMIT_1F
;
147 EMIT_ATTR( _TNL_ATTRIB_FOG
, emit
, attrib
[FRAG_ATTRIB_FOGC
]);
150 if (RENDERINPUTS_TEST_RANGE(index_bitset
, _TNL_FIRST_TEX
, _TNL_LAST_TEX
))
152 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
153 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_TEX(i
) )) {
154 EMIT_ATTR( _TNL_ATTRIB_TEX(i
), EMIT_4F
,
155 attrib
[FRAG_ATTRIB_TEX0
+ i
] );
160 /* shader varying vars */
161 if (RENDERINPUTS_TEST_RANGE( index_bitset
,
162 _TNL_FIRST_GENERIC
, _TNL_LAST_GENERIC
)) {
163 for (i
= 0; i
< ctx
->Const
.MaxVarying
; i
++) {
164 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_GENERIC(i
) )) {
165 EMIT_ATTR( _TNL_ATTRIB_GENERIC(i
), VARYING_EMIT_STYLE
,
166 attrib
[FRAG_ATTRIB_VAR0
+ i
] );
171 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_POINTSIZE
))
172 EMIT_ATTR( _TNL_ATTRIB_POINTSIZE
, EMIT_1F
, pointSize
);
174 _tnl_install_attrs( ctx
, map
, e
,
175 ctx
->Viewport
._WindowMap
.m
,
178 RENDERINPUTS_COPY( swsetup
->last_index_bitset
, index_bitset
);
184 * Prepare to render a vertex buffer.
185 * Called via tnl->Driver.Render.Start.
188 _swsetup_RenderStart( GLcontext
*ctx
)
190 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
191 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
192 struct vertex_buffer
*VB
= &tnl
->vb
;
194 if (swsetup
->NewState
& _SWSETUP_NEW_RENDERINDEX
) {
195 _swsetup_choose_trifuncs(ctx
);
198 if (swsetup
->NewState
& _NEW_PROGRAM
) {
199 RENDERINPUTS_ZERO( swsetup
->last_index_bitset
);
202 swsetup
->NewState
= 0;
204 _swrast_render_start(ctx
);
207 VB
->AttribPtr
[VERT_ATTRIB_POS
] = VB
->NdcPtr
;
209 setup_vertex_format(ctx
);
214 * We patch this function into tnl->Driver.Render.Finish.
215 * It's called when we finish rendering a vertex buffer.
218 _swsetup_RenderFinish( GLcontext
*ctx
)
220 _swrast_render_finish( ctx
);
224 _swsetup_InvalidateState( GLcontext
*ctx
, GLuint new_state
)
226 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
227 swsetup
->NewState
|= new_state
;
228 _tnl_invalidate_vertex_state( ctx
, new_state
);
233 _swsetup_Wakeup( GLcontext
*ctx
)
235 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
236 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
238 tnl
->Driver
.Render
.Start
= _swsetup_RenderStart
;
239 tnl
->Driver
.Render
.Finish
= _swsetup_RenderFinish
;
240 tnl
->Driver
.Render
.PrimitiveNotify
= _swsetup_RenderPrimitive
;
241 tnl
->Driver
.Render
.Interp
= _tnl_interp
;
242 tnl
->Driver
.Render
.CopyPV
= _tnl_copy_pv
;
243 tnl
->Driver
.Render
.ClippedPolygon
= _tnl_RenderClippedPolygon
; /* new */
244 tnl
->Driver
.Render
.ClippedLine
= _tnl_RenderClippedLine
; /* new */
249 tnl
->Driver
.Render
.PrimTabVerts
= _tnl_render_tab_verts
;
250 tnl
->Driver
.Render
.PrimTabElts
= _tnl_render_tab_elts
;
251 tnl
->Driver
.Render
.ResetLineStipple
= _swrast_ResetLineStipple
;
252 tnl
->Driver
.Render
.BuildVertices
= _tnl_build_vertices
;
253 tnl
->Driver
.Render
.Multipass
= 0;
255 _tnl_invalidate_vertices( ctx
, ~0 );
256 _tnl_need_projected_coords( ctx
, GL_TRUE
);
257 _swsetup_InvalidateState( ctx
, ~0 );
259 swsetup
->verts
= (SWvertex
*)tnl
->clipspace
.vertex_buf
;
260 RENDERINPUTS_ZERO( swsetup
->last_index_bitset
);
265 * Populate a swrast SWvertex from an attrib-style vertex.
268 _swsetup_Translate( GLcontext
*ctx
, const void *vertex
, SWvertex
*dest
)
270 const GLfloat
*m
= ctx
->Viewport
._WindowMap
.m
;
274 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POS
, tmp
);
276 dest
->attrib
[FRAG_ATTRIB_WPOS
][0] = m
[0] * tmp
[0] + m
[12];
277 dest
->attrib
[FRAG_ATTRIB_WPOS
][1] = m
[5] * tmp
[1] + m
[13];
278 dest
->attrib
[FRAG_ATTRIB_WPOS
][2] = m
[10] * tmp
[2] + m
[14];
279 dest
->attrib
[FRAG_ATTRIB_WPOS
][3] = tmp
[3];
281 /** XXX try to limit these loops someday */
282 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
283 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_TEX0
+i
,
284 dest
->attrib
[FRAG_ATTRIB_TEX0
+ i
] );
286 for (i
= 0 ; i
< ctx
->Const
.MaxVarying
; i
++)
287 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_GENERIC0
+i
,
288 dest
->attrib
[FRAG_ATTRIB_VAR0
+ i
] );
290 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR0
, tmp
);
291 UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest
->color
, tmp
);
293 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR1
, tmp
);
294 COPY_4V(dest
->attrib
[FRAG_ATTRIB_COL1
], tmp
);
296 UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->specular, tmp );
299 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_FOG
, tmp
);
300 dest
->attrib
[FRAG_ATTRIB_FOGC
][0] = tmp
[0];
302 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR_INDEX
, tmp
);
303 dest
->attrib
[FRAG_ATTRIB_CI
][0] = tmp
[0];
305 /* XXX See _tnl_get_attr about pointsize ... */
306 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POINTSIZE
, tmp
);
307 dest
->pointSize
= tmp
[0];