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>
28 #include "main/glheader.h"
29 #include "main/imports.h"
30 #include "main/colormac.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( GLcontext
*ctx
)
52 SScontext
*swsetup
= (SScontext
*)CALLOC(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( GLcontext
*ctx
)
72 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
76 ctx
->swsetup_context
= 0;
79 _tnl_free_vertices( ctx
);
83 _swsetup_RenderPrimitive( GLcontext
*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(GLcontext
*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_UNSIGNED_BYTE
;
120 if (intColors
!= swsetup
->intColors
||
121 !RENDERINPUTS_EQUAL(tnl
->render_inputs_bitset
,
122 swsetup
->last_index_bitset
)) {
123 DECLARE_RENDERINPUTS(index_bitset
);
124 struct tnl_attr_map map
[_TNL_ATTRIB_MAX
];
127 swsetup
->intColors
= intColors
;
129 RENDERINPUTS_COPY( index_bitset
, tnl
->render_inputs_bitset
);
131 EMIT_ATTR( _TNL_ATTRIB_POS
, EMIT_4F_VIEWPORT
, attrib
[FRAG_ATTRIB_WPOS
] );
133 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR0
)) {
134 if (swsetup
->intColors
)
135 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4CHAN_4F_RGBA
, color
);
137 EMIT_ATTR( _TNL_ATTRIB_COLOR0
, EMIT_4F
, attrib
[FRAG_ATTRIB_COL0
]);
140 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR1
)) {
141 EMIT_ATTR( _TNL_ATTRIB_COLOR1
, EMIT_4F
, attrib
[FRAG_ATTRIB_COL1
]);
144 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_COLOR_INDEX
)) {
145 EMIT_ATTR( _TNL_ATTRIB_COLOR_INDEX
, EMIT_1F
,
146 attrib
[FRAG_ATTRIB_CI
][0] );
149 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_FOG
)) {
150 const GLint emit
= ctx
->FragmentProgram
._Current
? EMIT_4F
: EMIT_1F
;
151 EMIT_ATTR( _TNL_ATTRIB_FOG
, emit
, attrib
[FRAG_ATTRIB_FOGC
]);
154 if (RENDERINPUTS_TEST_RANGE(index_bitset
, _TNL_FIRST_TEX
, _TNL_LAST_TEX
))
156 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
157 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_TEX(i
) )) {
158 EMIT_ATTR( _TNL_ATTRIB_TEX(i
), EMIT_4F
,
159 attrib
[FRAG_ATTRIB_TEX0
+ i
] );
164 /* shader varying vars */
165 if (RENDERINPUTS_TEST_RANGE( index_bitset
,
166 _TNL_FIRST_GENERIC
, _TNL_LAST_GENERIC
)) {
167 for (i
= 0; i
< ctx
->Const
.MaxVarying
; i
++) {
168 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_GENERIC(i
) )) {
169 EMIT_ATTR( _TNL_ATTRIB_GENERIC(i
), VARYING_EMIT_STYLE
,
170 attrib
[FRAG_ATTRIB_VAR0
+ i
] );
175 if (RENDERINPUTS_TEST( index_bitset
, _TNL_ATTRIB_POINTSIZE
))
176 EMIT_ATTR( _TNL_ATTRIB_POINTSIZE
, EMIT_1F
, pointSize
);
178 _tnl_install_attrs( ctx
, map
, e
,
179 ctx
->Viewport
._WindowMap
.m
,
182 RENDERINPUTS_COPY( swsetup
->last_index_bitset
, index_bitset
);
188 * Prepare to render a vertex buffer.
189 * Called via tnl->Driver.Render.Start.
192 _swsetup_RenderStart( GLcontext
*ctx
)
194 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
195 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
196 struct vertex_buffer
*VB
= &tnl
->vb
;
198 if (swsetup
->NewState
& _SWSETUP_NEW_RENDERINDEX
) {
199 _swsetup_choose_trifuncs(ctx
);
202 if (swsetup
->NewState
& _NEW_PROGRAM
) {
203 RENDERINPUTS_ZERO( swsetup
->last_index_bitset
);
206 swsetup
->NewState
= 0;
208 /* This will change if drawing unfilled tris */
209 _swrast_SetFacing(ctx
, 0);
211 _swrast_render_start(ctx
);
214 VB
->AttribPtr
[VERT_ATTRIB_POS
] = VB
->NdcPtr
;
216 setup_vertex_format(ctx
);
221 * We patch this function into tnl->Driver.Render.Finish.
222 * It's called when we finish rendering a vertex buffer.
225 _swsetup_RenderFinish( GLcontext
*ctx
)
227 _swrast_render_finish( ctx
);
231 _swsetup_InvalidateState( GLcontext
*ctx
, GLuint new_state
)
233 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
234 swsetup
->NewState
|= new_state
;
235 _tnl_invalidate_vertex_state( ctx
, new_state
);
240 _swsetup_Wakeup( GLcontext
*ctx
)
242 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
243 SScontext
*swsetup
= SWSETUP_CONTEXT(ctx
);
245 tnl
->Driver
.Render
.Start
= _swsetup_RenderStart
;
246 tnl
->Driver
.Render
.Finish
= _swsetup_RenderFinish
;
247 tnl
->Driver
.Render
.PrimitiveNotify
= _swsetup_RenderPrimitive
;
248 tnl
->Driver
.Render
.Interp
= _tnl_interp
;
249 tnl
->Driver
.Render
.CopyPV
= _tnl_copy_pv
;
250 tnl
->Driver
.Render
.ClippedPolygon
= _tnl_RenderClippedPolygon
; /* new */
251 tnl
->Driver
.Render
.ClippedLine
= _tnl_RenderClippedLine
; /* new */
256 tnl
->Driver
.Render
.PrimTabVerts
= _tnl_render_tab_verts
;
257 tnl
->Driver
.Render
.PrimTabElts
= _tnl_render_tab_elts
;
258 tnl
->Driver
.Render
.ResetLineStipple
= _swrast_ResetLineStipple
;
259 tnl
->Driver
.Render
.BuildVertices
= _tnl_build_vertices
;
260 tnl
->Driver
.Render
.Multipass
= 0;
262 _tnl_invalidate_vertices( ctx
, ~0 );
263 _tnl_need_projected_coords( ctx
, GL_TRUE
);
264 _swsetup_InvalidateState( ctx
, ~0 );
266 swsetup
->verts
= (SWvertex
*)tnl
->clipspace
.vertex_buf
;
267 RENDERINPUTS_ZERO( swsetup
->last_index_bitset
);
272 * Populate a swrast SWvertex from an attrib-style vertex.
275 _swsetup_Translate( GLcontext
*ctx
, const void *vertex
, SWvertex
*dest
)
277 const GLfloat
*m
= ctx
->Viewport
._WindowMap
.m
;
281 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POS
, tmp
);
283 dest
->attrib
[FRAG_ATTRIB_WPOS
][0] = m
[0] * tmp
[0] + m
[12];
284 dest
->attrib
[FRAG_ATTRIB_WPOS
][1] = m
[5] * tmp
[1] + m
[13];
285 dest
->attrib
[FRAG_ATTRIB_WPOS
][2] = m
[10] * tmp
[2] + m
[14];
286 dest
->attrib
[FRAG_ATTRIB_WPOS
][3] = tmp
[3];
288 /** XXX try to limit these loops someday */
289 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
290 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_TEX0
+ i
,
291 dest
->attrib
[FRAG_ATTRIB_TEX0
+ i
] );
293 for (i
= 0 ; i
< ctx
->Const
.MaxVarying
; i
++)
294 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_GENERIC0
+ i
,
295 dest
->attrib
[FRAG_ATTRIB_VAR0
+ i
] );
297 if (ctx
->Visual
.rgbMode
) {
298 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR0
,
299 dest
->attrib
[FRAG_ATTRIB_COL0
] );
300 UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest
->color
, tmp
);
302 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR1
,
303 dest
->attrib
[FRAG_ATTRIB_COL1
]);
306 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_COLOR_INDEX
, tmp
);
307 dest
->attrib
[FRAG_ATTRIB_CI
][0] = tmp
[0];
310 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_FOG
, tmp
);
311 dest
->attrib
[FRAG_ATTRIB_FOGC
][0] = tmp
[0];
313 /* XXX See _tnl_get_attr about pointsize ... */
314 _tnl_get_attr( ctx
, vertex
, _TNL_ATTRIB_POINTSIZE
, tmp
);
315 dest
->pointSize
= tmp
[0];