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 if (ctx
->FragmentProgram
._Current
127 || ctx
->ATIFragmentShader
._Enabled
128 || CHAN_TYPE
== GL_FLOAT
)
129 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4F
, attrib
[FRAG_ATTRIB_COL0
]);
131 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4CHAN_4F_RGBA
, color
);
134 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR1
)) {
135 EMIT_ATTR( _TNL_ATTRIB_COLOR1
, EMIT_4F
, attrib
[FRAG_ATTRIB_COL1
]);
138 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR_INDEX
)) {
139 EMIT_ATTR( _TNL_ATTRIB_COLOR_INDEX
, EMIT_1F
,
140 attrib
[FRAG_ATTRIB_CI
][0] );
143 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_FOG
)) {
144 const GLint emit
= ctx
->FragmentProgram
._Current
? EMIT_4F
: EMIT_1F
;
145 EMIT_ATTR( _TNL_ATTRIB_FOG
, emit
, attrib
[FRAG_ATTRIB_FOGC
]);
148 if (RENDERINPUTS_TEST_RANGE(index_bitset
, _TNL_FIRST_TEX
, _TNL_LAST_TEX
))
150 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
151 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_TEX(i
) )) {
152 EMIT_ATTR( _TNL_ATTRIB_TEX(i
), EMIT_4F
,
153 attrib
[FRAG_ATTRIB_TEX0
+ i
] );
158 /* shader varying vars */
159 if (RENDERINPUTS_TEST_RANGE( index_bitset
,
160 _TNL_FIRST_GENERIC
, _TNL_LAST_GENERIC
)) {
161 for (i
= 0; i
< ctx
->Const
.MaxVarying
; i
++) {
162 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_GENERIC(i
) )) {
163 EMIT_ATTR( _TNL_ATTRIB_GENERIC(i
), VARYING_EMIT_STYLE
,
164 attrib
[FRAG_ATTRIB_VAR0
+ i
] );
169 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_POINTSIZE
))
170 EMIT_ATTR( _TNL_ATTRIB_POINTSIZE
, EMIT_1F
, pointSize
);
172 _tnl_install_attrs( ctx
, map
, e
,
173 ctx
->Viewport
._WindowMap
.m
,
176 RENDERINPUTS_COPY( swsetup
->last_index_bitset
, index_bitset
);
182 * Prepare to render a vertex buffer.
183 * Called via tnl->Driver.Render.Start.
186 _swsetup_RenderStart( GLcontext
*ctx
)
188 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
189 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
190 struct vertex_buffer
*VB
= &tnl
->vb
;
192 if (swsetup
->NewState
& _SWSETUP_NEW_RENDERINDEX
) {
193 _swsetup_choose_trifuncs(ctx
);
196 if (swsetup
->NewState
& _NEW_PROGRAM
) {
197 RENDERINPUTS_ZERO( swsetup
->last_index_bitset
);
200 swsetup
->NewState
= 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( GLcontext
*ctx
)
218 _swrast_render_finish( ctx
);
222 _swsetup_InvalidateState( GLcontext
*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( GLcontext
*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 RENDERINPUTS_ZERO( swsetup
->last_index_bitset
);
263 * Populate a swrast SWvertex from an attrib-style vertex.
266 _swsetup_Translate( GLcontext
*ctx
, const void *vertex
, SWvertex
*dest
)
268 const GLfloat
*m
= ctx
->Viewport
._WindowMap
.m
;
272 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POS
, tmp
);
274 dest
->attrib
[FRAG_ATTRIB_WPOS
][0] = m
[0] * tmp
[0] + m
[12];
275 dest
->attrib
[FRAG_ATTRIB_WPOS
][1] = m
[5] * tmp
[1] + m
[13];
276 dest
->attrib
[FRAG_ATTRIB_WPOS
][2] = m
[10] * tmp
[2] + m
[14];
277 dest
->attrib
[FRAG_ATTRIB_WPOS
][3] = tmp
[3];
279 /** XXX try to limit these loops someday */
280 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
281 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_TEX0
+i
,
282 dest
->attrib
[FRAG_ATTRIB_TEX0
+ i
] );
284 for (i
= 0 ; i
< ctx
->Const
.MaxVarying
; i
++)
285 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_GENERIC0
+i
,
286 dest
->attrib
[FRAG_ATTRIB_VAR0
+ i
] );
288 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR0
, tmp
);
289 UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest
->color
, tmp
);
291 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR1
, tmp
);
292 COPY_4V(dest
->attrib
[FRAG_ATTRIB_COL1
], tmp
);
294 UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->specular, tmp );
297 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_FOG
, tmp
);
298 dest
->attrib
[FRAG_ATTRIB_FOGC
][0] = tmp
[0];
300 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR_INDEX
, tmp
);
301 dest
->attrib
[FRAG_ATTRIB_CI
][0] = tmp
[0];
303 /* XXX See _tnl_get_attr about pointsize ... */
304 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POINTSIZE
, tmp
);
305 dest
->pointSize
= tmp
[0];