1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 *
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:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
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.
23 *
24 * Authors:
25 * Keith Whitwell <keith@tungstengraphics.com>
26 */
27
28 #include "main/glheader.h"
29 #include "main/imports.h"
30 #include "main/colormac.h"
31 #include "tnl/tnl.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"
38
39
40 /* Need to check lighting state and vertex program state to know
41 * if two-sided lighting is in effect.
42 */
43 #define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT|_NEW_PROGRAM)
44
45
46 #define VARYING_EMIT_STYLE EMIT_4F
47
48
49 GLboolean
_swsetup_CreateContext(struct gl_context * ctx)50 _swsetup_CreateContext( struct gl_context *ctx )
51 {
52 SScontext *swsetup = (SScontext *)CALLOC(sizeof(SScontext));
53
54 if (!swsetup)
55 return GL_FALSE;
56
57 ctx->swsetup_context = swsetup;
58
59 swsetup->NewState = ~0;
60 _swsetup_trifuncs_init( ctx );
61
62 _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12,
63 sizeof(SWvertex) );
64
65
66 return GL_TRUE;
67 }
68
69 void
_swsetup_DestroyContext(struct gl_context * ctx)70 _swsetup_DestroyContext( struct gl_context *ctx )
71 {
72 SScontext *swsetup = SWSETUP_CONTEXT(ctx);
73
74 if (swsetup) {
75 FREE(swsetup);
76 ctx->swsetup_context = 0;
77 }
78
79 _tnl_free_vertices( ctx );
80 }
81
82 static void
_swsetup_RenderPrimitive(struct gl_context * ctx,GLenum mode)83 _swsetup_RenderPrimitive( struct gl_context *ctx, GLenum mode )
84 {
85 SWSETUP_CONTEXT(ctx)->render_prim = mode;
86 _swrast_render_primitive( ctx, mode );
87 }
88
89
90 /**
91 * Helper macros for setup_vertex_format()
92 */
93 #define SWZ ((SWvertex *)0)
94 #define SWOffset(MEMBER) (((char *)&(SWZ->MEMBER)) - ((char *)SWZ))
95
96 #define EMIT_ATTR( ATTR, STYLE, MEMBER ) \
97 do { \
98 map[e].attrib = (ATTR); \
99 map[e].format = (STYLE); \
100 map[e].offset = SWOffset(MEMBER); \
101 e++; \
102 } while (0)
103
104
105 /**
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().
109 */
110 static void
setup_vertex_format(struct gl_context * ctx)111 setup_vertex_format(struct gl_context *ctx)
112 {
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;
119
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;
125
126 swsetup->intColors = intColors;
127
128 EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, attrib[FRAG_ATTRIB_WPOS] );
129
130 if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_COLOR0)) {
131 if (swsetup->intColors)
132 EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4CHAN_4F_RGBA, color );
133 else
134 EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4F, attrib[FRAG_ATTRIB_COL0]);
135 }
136
137 if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_COLOR1)) {
138 EMIT_ATTR( _TNL_ATTRIB_COLOR1, EMIT_4F, attrib[FRAG_ATTRIB_COL1]);
139 }
140
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[FRAG_ATTRIB_FOGC]);
144 }
145
146 if (index_bitset & BITFIELD64_RANGE(_TNL_ATTRIB_TEX0, _TNL_NUM_TEX))
147 {
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[FRAG_ATTRIB_TEX0 + i] );
152 }
153 }
154 }
155
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[FRAG_ATTRIB_VAR0 + i] );
162 }
163 }
164 }
165
166 if (index_bitset & BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE))
167 EMIT_ATTR( _TNL_ATTRIB_POINTSIZE, EMIT_1F, pointSize );
168
169 _tnl_install_attrs( ctx, map, e,
170 ctx->Viewport._WindowMap.m,
171 sizeof(SWvertex) );
172
173 swsetup->last_index_bitset = index_bitset;
174 }
175 }
176
177
178 /**
179 * Prepare to render a vertex buffer.
180 * Called via tnl->Driver.Render.Start.
181 */
182 static void
_swsetup_RenderStart(struct gl_context * ctx)183 _swsetup_RenderStart( struct gl_context *ctx )
184 {
185 SScontext *swsetup = SWSETUP_CONTEXT(ctx);
186 TNLcontext *tnl = TNL_CONTEXT(ctx);
187 struct vertex_buffer *VB = &tnl->vb;
188
189 if (swsetup->NewState & _SWSETUP_NEW_RENDERINDEX) {
190 _swsetup_choose_trifuncs(ctx);
191 }
192
193 if (swsetup->NewState & _NEW_PROGRAM) {
194 swsetup->last_index_bitset = 0;
195 }
196
197 swsetup->NewState = 0;
198
199 /* This will change if drawing unfilled tris */
200 _swrast_SetFacing(ctx, 0);
201
202 _swrast_render_start(ctx);
203
204 /* Important */
205 VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
206
207 setup_vertex_format(ctx);
208 }
209
210
211 /*
212 * We patch this function into tnl->Driver.Render.Finish.
213 * It's called when we finish rendering a vertex buffer.
214 */
215 static void
_swsetup_RenderFinish(struct gl_context * ctx)216 _swsetup_RenderFinish( struct gl_context *ctx )
217 {
218 _swrast_render_finish( ctx );
219 }
220
221 void
_swsetup_InvalidateState(struct gl_context * ctx,GLuint new_state)222 _swsetup_InvalidateState( struct gl_context *ctx, GLuint new_state )
223 {
224 SScontext *swsetup = SWSETUP_CONTEXT(ctx);
225 swsetup->NewState |= new_state;
226 _tnl_invalidate_vertex_state( ctx, new_state );
227 }
228
229
230 void
_swsetup_Wakeup(struct gl_context * ctx)231 _swsetup_Wakeup( struct gl_context *ctx )
232 {
233 TNLcontext *tnl = TNL_CONTEXT(ctx);
234 SScontext *swsetup = SWSETUP_CONTEXT(ctx);
235
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 */
243 /* points */
244 /* line */
245 /* triangle */
246 /* quad */
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;
252
253 _tnl_invalidate_vertices( ctx, ~0 );
254 _tnl_need_projected_coords( ctx, GL_TRUE );
255 _swsetup_InvalidateState( ctx, ~0 );
256
257 swsetup->verts = (SWvertex *)tnl->clipspace.vertex_buf;
258 swsetup->last_index_bitset = 0;
259 }
260
261
262 /**
263 * Populate a swrast SWvertex from an attrib-style vertex.
264 */
265 void
_swsetup_Translate(struct gl_context * ctx,const void * vertex,SWvertex * dest)266 _swsetup_Translate( struct gl_context *ctx, const void *vertex, SWvertex *dest )
267 {
268 const GLfloat *m = ctx->Viewport._WindowMap.m;
269 GLfloat tmp[4];
270 GLuint i;
271
272 _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_POS, tmp );
273
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];
278
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] );
283
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] );
287
288 _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR0,
289 dest->attrib[FRAG_ATTRIB_COL0] );
290 UNCLAMPED_FLOAT_TO_RGBA_CHAN( dest->color, tmp );
291
292 _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_COLOR1,
293 dest->attrib[FRAG_ATTRIB_COL1]);
294
295 _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_FOG, tmp );
296 dest->attrib[FRAG_ATTRIB_FOGC][0] = tmp[0];
297
298 /* XXX See _tnl_get_attr about pointsize ... */
299 _tnl_get_attr( ctx, vertex, _TNL_ATTRIB_POINTSIZE, tmp );
300 dest->pointSize = tmp[0];
301 }
302
303