state_feedback.c@ 25149

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crOpenGL: export to OSE
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1	/* Copyright (c) 2001, Stanford University
2	* All rights reserved
3	*
4	* See the file LICENSE.txt for information on redistributing this software.
5	*/
6
7	#include "state.h"
8	#include "state_internals.h"
9	#include "state/cr_statetypes.h"
10	#include "state/cr_feedback.h"
11
12	/*
13	* This file is really a complement to the feedbackSPU and as such
14	* has big dependencies upon it. We have to monitor a whole bunch
15	* of state in the feedbackSPU to be able to properly implement
16	* full functionality.
17	*
18	* We have to intercept glColor3f(v)/4f(v) to get state updates on
19	* color properties and also glTexCoord* too, as unlike the tilesortSPU
20	* we don't have a pincher that pulls these out as they're passing
21	* through.
22	*
23	* - Alan.
24	*/
25
26
27	/*
28	* Selection and feedback
29	*
30	* TODO:
31	* 1. Implement lighting for vertex colors for feedback
32	* 2. Implement user clip planes for points and lines
33	*/
34
35
36	/**********************************************************************/
37	/*** Vertex Transformation and Clipping ***/
38	/**********************************************************************/
39
40	/*
41	* Transform a point (column vector) by a matrix: Q = M * P
42	*/
43	#define TRANSFORM_POINT( Q, M, P ) \
44	Q.x = (M).m00 * P.x + (M).m10 * P.y + (M).m20 * P.z + (M).m30 * P.w; \
45	Q.y = (M).m01 * P.x + (M).m11 * P.y + (M).m21 * P.z + (M).m31 * P.w; \
46	Q.z = (M).m02 * P.x + (M).m12 * P.y + (M).m22 * P.z + (M).m32 * P.w; \
47	Q.w = (M).m03 * P.x + (M).m13 * P.y + (M).m23 * P.z + (M).m33 * P.w;
48
49	#define TRANSFORM_POINTA( Q, M, P ) \
50	Q.x = (M).m00 * (P)[0] + (M).m10 * (P)[1] + (M).m20 * (P)[2] + (M).m30 * (P)[3]; \
51	Q.y = (M).m01 * (P)[0] + (M).m11 * (P)[1] + (M).m21 * (P)[2] + (M).m31 * (P)[3]; \
52	Q.z = (M).m02 * (P)[0] + (M).m12 * (P)[1] + (M).m22 * (P)[2] + (M).m32 * (P)[3]; \
53	Q.w = (M).m03 * (P)[0] + (M).m13 * (P)[1] + (M).m23 * (P)[2] + (M).m33 * (P)[3];
54
55	/*
56	* clip coord to window coord mapping
57	*/
58	#define MAP_POINT( Q, P, VP ) \
59	Q.x = (GLfloat) (((P.x / P.w) + 1.0) * VP.viewportW / 2.0 + VP.viewportX); \
60	Q.y = (GLfloat) (((P.y / P.w) + 1.0) * VP.viewportH / 2.0 + VP.viewportY); \
61	Q.z = (GLfloat) (((P.z / P.w) + 1.0) * (VP.farClip - VP.nearClip) / 2.0 + VP.nearClip);\
62	Q.w = (GLfloat) P.w;
63
64
65	/*
66	* Linear interpolation:
67	*/
68	#define INTERPOLATE(T, A, B) ((A) + ((B) - (A)) * (T))
69
70
71	/*
72	* Interpolate vertex position, color, texcoords, etc.
73	*/
74	static void
75	interpolate_vertex(GLfloat t,
76	const CRVertex v0, const CRVertex v1,
77	CRVertex *vOut)
78	{
79	vOut->eyePos.x = INTERPOLATE(t, v0->eyePos.x, v1->eyePos.x);
80	vOut->eyePos.y = INTERPOLATE(t, v0->eyePos.y, v1->eyePos.y);
81	vOut->eyePos.z = INTERPOLATE(t, v0->eyePos.z, v1->eyePos.z);
82	vOut->eyePos.w = INTERPOLATE(t, v0->eyePos.w, v1->eyePos.w);
83
84	vOut->clipPos.x = INTERPOLATE(t, v0->clipPos.x, v1->clipPos.x);
85	vOut->clipPos.y = INTERPOLATE(t, v0->clipPos.y, v1->clipPos.y);
86	vOut->clipPos.z = INTERPOLATE(t, v0->clipPos.z, v1->clipPos.z);
87	vOut->clipPos.w = INTERPOLATE(t, v0->clipPos.w, v1->clipPos.w);
88
89	vOut->attrib[VERT_ATTRIB_COLOR0][0] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_COLOR0][0], v1->attrib[VERT_ATTRIB_COLOR0][0]);
90	vOut->attrib[VERT_ATTRIB_COLOR0][1] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_COLOR0][1], v1->attrib[VERT_ATTRIB_COLOR0][1]);
91	vOut->attrib[VERT_ATTRIB_COLOR0][2] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_COLOR0][2], v1->attrib[VERT_ATTRIB_COLOR0][2]);
92	vOut->attrib[VERT_ATTRIB_COLOR0][3] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_COLOR0][3], v1->attrib[VERT_ATTRIB_COLOR0][3]);
93
94	vOut->colorIndex = INTERPOLATE(t, v0->colorIndex, v1->colorIndex);
95
96	vOut->attrib[VERT_ATTRIB_TEX0][0] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_TEX0][0], v1->attrib[VERT_ATTRIB_TEX0][0]);
97	vOut->attrib[VERT_ATTRIB_TEX0][1] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_TEX0][1], v1->attrib[VERT_ATTRIB_TEX0][0]);
98	vOut->attrib[VERT_ATTRIB_TEX0][2] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_TEX0][2], v1->attrib[VERT_ATTRIB_TEX0][0]);
99	vOut->attrib[VERT_ATTRIB_TEX0][3] = INTERPOLATE(t, v0->attrib[VERT_ATTRIB_TEX0][3], v1->attrib[VERT_ATTRIB_TEX0][0]);
100	}
101
102
103
104
105	/* clip bit codes */
106	#define CLIP_LEFT 1
107	#define CLIP_RIGHT 2
108	#define CLIP_BOTTOM 4
109	#define CLIP_TOP 8
110	#define CLIP_NEAR 16
111	#define CLIP_FAR 32
112	#define CLIP_USER0 64
113	#define CLIP_USER1 128
114
115
116	/*
117	* Apply clip testing to a point.
118	* Return: 0 - visible
119	* non-zero - clip code mask (or of above CLIP_ bits)
120	*/
121	static GLuint
122	clip_point(const CRVertex *v)
123	{
124	CRContext *g = GetCurrentContext();
125	GLuint mask = 0;
126	GLuint i;
127
128	/* user-defined clip planes */
129	for (i = 0; i < g->limits.maxClipPlanes; i++)
130	{
131	if (g->transform.clip[i])
132	{
133	const GLvectord *plane = g->transform.clipPlane + i;
134	if (plane->x * v->eyePos.x +
135	plane->y * v->eyePos.y +
136	plane->z * v->eyePos.z +
137	plane->w * v->eyePos.w < 0.0)
138	mask \|= (CLIP_USER0 << i);
139	}
140	}
141
142	/* view volume clipping */
143	if (v->clipPos.x > v->clipPos.w)
144	mask \|= CLIP_RIGHT;
145	if (v->clipPos.x < -v->clipPos.w)
146	mask \|= CLIP_LEFT;
147	if (v->clipPos.y > v->clipPos.w)
148	mask \|= CLIP_TOP;
149	if (v->clipPos.y < -v->clipPos.w)
150	mask \|= CLIP_BOTTOM;
151	if (v->clipPos.z > v->clipPos.w)
152	mask \|= CLIP_FAR;
153	if (v->clipPos.z < -v->clipPos.w)
154	mask \|= CLIP_NEAR;
155	return mask;
156	}
157
158
159	/*
160	* Apply clipping to a line segment.
161	* Input: v0, v1 - incoming vertices
162	* Output: v0out, v1out - result/clipped vertices
163	* Return: GL_TRUE: visible
164	* GL_FALSE: totally clipped
165	*/
166	static GLboolean
167	clip_line(const CRVertex v0in, const CRVertex v1in,
168	CRVertex v0new, CRVertex v1new)
169	{
170	CRVertex v0, v1, vNew;
171	GLfloat dx, dy, dz, dw, t;
172	GLuint code0, code1;
173
174	/* XXX need to do user-clip planes */
175
176	code0 = clip_point(v0in);
177	code1 = clip_point(v1in);
178	if (code0 & code1)
179	return GL_FALSE; /* totally clipped */
180
181	v0new = v0in;
182	v1new = v1in;
183	if (code0 == 0 && code1 == 0)
184	return GL_TRUE; /* no clipping needed */
185
186	v0 = *v0in;
187	v1 = *v1in;
188
189
190	/*
191	* We use 6 instances of this code to clip agains the 6 planes.
192	* For each plane, we define the OUTSIDE and COMPUTE_INTERSECTION
193	* macros apprpriately.
194	*/
195	#define GENERAL_CLIP \
196	if (OUTSIDE(v0)) { \
197	if (OUTSIDE(v1)) { \
198	/* both verts are outside ==> return 0 */ \
199	return 0; \
200	} \
201	else { \
202	/* v0 is outside, v1 is inside ==> clip */ \
203	COMPUTE_INTERSECTION( v1, v0, vNew ) \
204	interpolate_vertex(t, &v1, &v0, &vNew); \
205	v0 = vNew; \
206	} \
207	} \
208	else { \
209	if (OUTSIDE(v1)) { \
210	/* v0 is inside, v1 is outside ==> clip */ \
211	COMPUTE_INTERSECTION( v0, v1, vNew ) \
212	interpolate_vertex(t, &v0, &v1, &vNew); \
213	v1 = vNew; \
214	} \
215	/* else both verts are inside ==> do nothing */ \
216	}
217
218	/* Clip against +X side */
219	#define OUTSIDE(V) (V.clipPos.x > V.clipPos.w)
220	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
221	dx = OUT.clipPos.x - IN.clipPos.x; \
222	dw = OUT.clipPos.w - IN.clipPos.w; \
223	t = (IN.clipPos.x - IN.clipPos.w) / (dw-dx);
224	GENERAL_CLIP
225	#undef OUTSIDE
226	#undef COMPUTE_INTERSECTION
227
228	/* Clip against -X side */
229	#define OUTSIDE(V) (V.clipPos.x < -(V.clipPos.w))
230	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
231	dx = OUT.clipPos.x - IN.clipPos.x; \
232	dw = OUT.clipPos.w - IN.clipPos.w; \
233	t = -(IN.clipPos.x + IN.clipPos.w) / (dw+dx);
234	GENERAL_CLIP
235	#undef OUTSIDE
236	#undef COMPUTE_INTERSECTION
237
238	/* Clip against +Y side */
239	#define OUTSIDE(V) (V.clipPos.y > V.clipPos.w)
240	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
241	dy = OUT.clipPos.y - IN.clipPos.y; \
242	dw = OUT.clipPos.w - IN.clipPos.w; \
243	t = (IN.clipPos.y - IN.clipPos.w) / (dw-dy);
244	GENERAL_CLIP
245	#undef OUTSIDE
246	#undef COMPUTE_INTERSECTION
247
248	/* Clip against -Y side */
249	#define OUTSIDE(V) (V.clipPos.y < -(V.clipPos.w))
250	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
251	dy = OUT.clipPos.y - IN.clipPos.y; \
252	dw = OUT.clipPos.w - IN.clipPos.w; \
253	t = -(IN.clipPos.y + IN.clipPos.w) / (dw+dy);
254	GENERAL_CLIP
255	#undef OUTSIDE
256	#undef COMPUTE_INTERSECTION
257
258	/* Clip against +Z side */
259	#define OUTSIDE(V) (V.clipPos.z > V.clipPos.w)
260	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
261	dz = OUT.clipPos.z - IN.clipPos.z; \
262	dw = OUT.clipPos.w - IN.clipPos.w; \
263	t = (IN.clipPos.z - IN.clipPos.w) / (dw-dz);
264	GENERAL_CLIP
265	#undef OUTSIDE
266	#undef COMPUTE_INTERSECTION
267
268	/* Clip against -Z side */
269	#define OUTSIDE(V) (V.clipPos.z < -(V.clipPos.w))
270	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
271	dz = OUT.clipPos.z - IN.clipPos.z; \
272	dw = OUT.clipPos.w - IN.clipPos.w; \
273	t = -(IN.clipPos.z + IN.clipPos.w) / (dw+dz);
274	GENERAL_CLIP
275	#undef OUTSIDE
276	#undef COMPUTE_INTERSECTION
277
278	#undef GENERAL_CLIP
279
280	*v0new = v0;
281	*v1new = v1;
282	return GL_TRUE;
283	}
284
285
286
287	/*
288	* Apply clipping to a polygon.
289	* Input: vIn - array of input vertices
290	* inCount - number of input vertices
291	* Output: vOut - new vertices
292	* Return: number of vertices in vOut
293	*/
294	static GLuint
295	clip_polygon(const CRVertex *vIn, unsigned int inCount,
296	CRVertex *vOut)
297	{
298	CRVertex inlist[20], outlist[20];
299	GLfloat dx, dy, dz, dw, t;
300	GLuint incount, outcount, previ, curri, result;
301	const CRVertex currVert, prevVert;
302	CRVertex *newVert;
303
304	/* XXX need to do user-clip planes */
305
306	#define GENERAL_CLIP(INCOUNT, INLIST, OUTCOUNT, OUTLIST) \
307	if (INCOUNT < 3) \
308	return GL_FALSE; \
309	previ = INCOUNT - 1; /* let previous = last vertex */ \
310	prevVert = INLIST + previ; \
311	OUTCOUNT = 0; \
312	for (curri = 0; curri < INCOUNT; curri++) { \
313	currVert = INLIST + curri; \
314	if (INSIDE(currVert)) { \
315	if (INSIDE(prevVert)) { \
316	/* both verts are inside ==> copy current to outlist */ \
317	OUTLIST[OUTCOUNT] = *currVert; \
318	OUTCOUNT++; \
319	} \
320	else { \
321	newVert = OUTLIST + OUTCOUNT; \
322	/* current is inside and previous is outside ==> clip */ \
323	COMPUTE_INTERSECTION( currVert, prevVert, newVert ) \
324	OUTCOUNT++; \
325	/* Output current */ \
326	OUTLIST[OUTCOUNT] = *currVert; \
327	OUTCOUNT++; \
328	} \
329	} \
330	else { \
331	if (INSIDE(prevVert)) { \
332	newVert = OUTLIST + OUTCOUNT; \
333	/* current is outside and previous is inside ==> clip */ \
334	COMPUTE_INTERSECTION( prevVert, currVert, newVert ); \
335	OUTLIST[OUTCOUNT] = *newVert; \
336	OUTCOUNT++; \
337	} \
338	/* else both verts are outside ==> do nothing */ \
339	} \
340	/* let previous = current */ \
341	previ = curri; \
342	prevVert = currVert; \
343	}
344
345	/*
346	* Clip against +X
347	*/
348	#define INSIDE(V) (V->clipPos.x <= V->clipPos.w)
349	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
350	dx = OUT->clipPos.x - IN->clipPos.x; \
351	dw = OUT->clipPos.w - IN->clipPos.w; \
352	t = (IN->clipPos.x - IN->clipPos.w) / (dw - dx); \
353	interpolate_vertex(t, IN, OUT, NEW );
354
355	GENERAL_CLIP(inCount, vIn, outcount, outlist)
356
357	#undef INSIDE
358	#undef COMPUTE_INTERSECTION
359
360	/*
361	* Clip against -X
362	*/
363	#define INSIDE(V) (V->clipPos.x >= -V->clipPos.w)
364	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
365	dx = OUT->clipPos.x - IN->clipPos.x; \
366	dw = OUT->clipPos.w - IN->clipPos.w; \
367	t = -(IN->clipPos.x + IN->clipPos.w) / (dw + dx); \
368	interpolate_vertex(t, IN, OUT, NEW );
369
370	GENERAL_CLIP(outcount, outlist, incount, inlist)
371
372	#undef INSIDE
373	#undef COMPUTE_INTERSECTION
374
375	/*
376	* Clip against +Y
377	*/
378	#define INSIDE(V) (V->clipPos.y <= V->clipPos.w)
379	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
380	dy = OUT->clipPos.y - IN->clipPos.y; \
381	dw = OUT->clipPos.w - IN->clipPos.w; \
382	t = (IN->clipPos.y - IN->clipPos.w) / (dw - dy); \
383	interpolate_vertex(t, IN, OUT, NEW );
384
385	GENERAL_CLIP(incount, inlist, outcount, outlist)
386
387	#undef INSIDE
388	#undef COMPUTE_INTERSECTION
389
390	/*
391	* Clip against -Y
392	*/
393	#define INSIDE(V) (V->clipPos.y >= -V->clipPos.w)
394	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
395	dy = OUT->clipPos.y - IN->clipPos.y; \
396	dw = OUT->clipPos.w - IN->clipPos.w; \
397	t = -(IN->clipPos.y + IN->clipPos.w) / (dw + dy); \
398	interpolate_vertex(t, IN, OUT, NEW );
399
400	GENERAL_CLIP(outcount, outlist, incount, inlist)
401
402	#undef INSIDE
403	#undef COMPUTE_INTERSECTION
404
405	/*
406	* Clip against +Z
407	*/
408	#define INSIDE(V) (V->clipPos.z <= V->clipPos.w)
409	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
410	dz = OUT->clipPos.z - IN->clipPos.z; \
411	dw = OUT->clipPos.w - IN->clipPos.w; \
412	t = (IN->clipPos.z - IN->clipPos.w) / (dw - dz); \
413	interpolate_vertex(t, IN, OUT, NEW );
414
415	GENERAL_CLIP(incount, inlist, outcount, outlist)
416
417	#undef INSIDE
418	#undef COMPUTE_INTERSECTION
419
420	/*
421	* Clip against -Z
422	*/
423	#define INSIDE(V) (V->clipPos.z >= -V->clipPos.w)
424	#define COMPUTE_INTERSECTION( IN, OUT, NEW ) \
425	dz = OUT->clipPos.z - IN->clipPos.z; \
426	dw = OUT->clipPos.w - IN->clipPos.w; \
427	t = -(IN->clipPos.z + IN->clipPos.w) / (dw + dz); \
428	interpolate_vertex(t, IN, OUT, NEW );
429
430	GENERAL_CLIP(outcount, outlist, result, vOut)
431
432	#undef INSIDE
433	#undef COMPUTE_INTERSECTION
434
435	#undef GENERAL_CLIP
436
437	return result;
438	}
439
440
441	/**********************************************************************/
442	/*** Feedback ***/
443	/**********************************************************************/
444
445
446	#define FB_3D 0x01
447	#define FB_4D 0x02
448	#define FB_INDEX 0x04
449	#define FB_COLOR 0x08
450	#define FB_TEXTURE 0X10
451
452	#define FEEDBACK_TOKEN( T ) \
453	do { \
454	if (f->count < f->bufferSize) { \
455	f->buffer[f->count] = (GLfloat) (T); \
456	} \
457	f->count++; \
458	} while (0)
459
460	/*
461	* Put a vertex into the feedback buffer.
462	*/
463	static void
464	feedback_vertex(const CRVertex *v)
465	{
466	CRContext *g = GetCurrentContext();
467	CRFeedbackState *f = &(g->feedback);
468	CRTransformState *t = &(g->transform);
469
470	FEEDBACK_TOKEN(v->winPos.x);
471	FEEDBACK_TOKEN(v->winPos.y);
472
473	if (f->mask & FB_3D)
474	{
475	FEEDBACK_TOKEN(v->winPos.z);
476	}
477
478	if (f->mask & FB_4D)
479	{
480	FEEDBACK_TOKEN(v->winPos.w);
481	}
482
483	/* We don't deal with color index in Chromium */
484	if (f->mask & FB_INDEX)
485	{
486	FEEDBACK_TOKEN(v->colorIndex);
487	}
488
489	if (f->mask & FB_COLOR)
490	{
491	FEEDBACK_TOKEN(v->attrib[VERT_ATTRIB_COLOR0][0]);
492	FEEDBACK_TOKEN(v->attrib[VERT_ATTRIB_COLOR0][1]);
493	FEEDBACK_TOKEN(v->attrib[VERT_ATTRIB_COLOR0][2]);
494	FEEDBACK_TOKEN(v->attrib[VERT_ATTRIB_COLOR0][3]);
495	}
496
497	if (f->mask & FB_TEXTURE)
498	{
499	GLvectorf coord, transCoord;
500	/* Ugh, copy (s,t,r,q) to (x,y,z,w) */
501	coord.x = v->attrib[VERT_ATTRIB_TEX0][0];
502	coord.y = v->attrib[VERT_ATTRIB_TEX0][1];
503	coord.z = v->attrib[VERT_ATTRIB_TEX0][2];
504	coord.w = v->attrib[VERT_ATTRIB_TEX0][3];
505	TRANSFORM_POINT(transCoord, *(t->textureStack[0].top), coord);
506	FEEDBACK_TOKEN(transCoord.x);
507	FEEDBACK_TOKEN(transCoord.y);
508	FEEDBACK_TOKEN(transCoord.z);
509	FEEDBACK_TOKEN(transCoord.w);
510	}
511	}
512
513
514
515	static void
516	feedback_rasterpos(void)
517	{
518	CRContext *g = GetCurrentContext();
519	CRVertex *tv = g->vBuffer + g->vCount;
520	CRVertex v;
521
522	v.winPos.x = g->current.rasterAttrib[VERT_ATTRIB_POS][0];
523	v.winPos.y = g->current.rasterAttrib[VERT_ATTRIB_POS][1];
524	v.winPos.z = g->current.rasterAttrib[VERT_ATTRIB_POS][2];
525	v.winPos.w = g->current.rasterAttrib[VERT_ATTRIB_POS][3];
526	COPY_4V(v.attrib[VERT_ATTRIB_COLOR0] , g->current.rasterAttrib[VERT_ATTRIB_COLOR0]); /* XXX need to apply lighting */
527	COPY_4V(v.attrib[VERT_ATTRIB_COLOR1] , g->current.rasterAttrib[VERT_ATTRIB_COLOR1]);
528	v.colorIndex = (GLfloat) g->current.rasterIndex;
529
530	/* Don't do this, we're capturing TexCoord ourselves and
531	* we'd miss the conversion in RasterPosUpdate */
532	/* v.texCoord[0] = g->current.rasterTexture; */
533
534	/* So we do this instead, and pluck it from the current vertex */
535	COPY_4V(v.attrib[VERT_ATTRIB_TEX0] , tv->attrib[VERT_ATTRIB_TEX0]);
536
537	feedback_vertex(&v);
538	}
539
540
541	static void
542	feedback_point(const CRVertex *v)
543	{
544	CRContext *g = GetCurrentContext();
545	CRFeedbackState *f = &(g->feedback);
546	if (clip_point(v) == 0)
547	{
548	CRVertex c = *v;
549	MAP_POINT(c.winPos, c.clipPos, g->viewport);
550	FEEDBACK_TOKEN((GLfloat) GL_POINT_TOKEN);
551	feedback_vertex(&c);
552	}
553	}
554
555
556	static void
557	feedback_line(const CRVertex v0, const CRVertex v1, GLboolean reset)
558	{
559	CRContext *g = GetCurrentContext();
560	CRFeedbackState *f = &(g->feedback);
561	CRVertex c0, c1;
562	if (clip_line(v0, v1, &c0, &c1))
563	{
564	MAP_POINT(c0.winPos, c0.clipPos, g->viewport);
565	MAP_POINT(c1.winPos, c1.clipPos, g->viewport);
566	if (reset)
567	FEEDBACK_TOKEN((GLfloat) GL_LINE_RESET_TOKEN);
568	else
569	FEEDBACK_TOKEN((GLfloat) GL_LINE_TOKEN);
570	feedback_vertex(&c0);
571	feedback_vertex(&c1);
572	}
573	}
574
575
576	static void
577	feedback_triangle(const CRVertex v0, const CRVertex v1, const CRVertex *v2)
578	{
579	CRContext *g = GetCurrentContext();
580	CRFeedbackState *f = &(g->feedback);
581	CRVertex vlist[3], vclipped[8];
582	GLuint i, n;
583
584	vlist[0] = *v0;
585	vlist[1] = *v1;
586	vlist[2] = *v2;
587	n = clip_polygon(vlist, 3, vclipped);
588	FEEDBACK_TOKEN( (GLfloat) GL_POLYGON_TOKEN );
589	FEEDBACK_TOKEN( (GLfloat) n );
590	for (i = 0; i < n; i++) {
591	MAP_POINT(vclipped[i].winPos, vclipped[i].clipPos, g->viewport);
592	feedback_vertex(vclipped + i);
593	}
594	}
595
596
597	void STATE_APIENTRY
598	crStateFeedbackVertex4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
599	{
600	CRContext *g = GetCurrentContext();
601	CRTransformState *t = &(g->transform);
602	CRPolygonState *p = &(g->polygon);
603	CRVertex *v = g->vBuffer + g->vCount;
604
605	/* store the vertex */
606	v->attrib[VERT_ATTRIB_POS][0] = x;
607	v->attrib[VERT_ATTRIB_POS][1] = y;
608	v->attrib[VERT_ATTRIB_POS][2] = z;
609	v->attrib[VERT_ATTRIB_POS][3] = w;
610	COPY_4V(v->attrib[VERT_ATTRIB_COLOR0] , g->current.vertexAttrib[VERT_ATTRIB_COLOR0]); /* XXX need to apply lighting */
611	v->colorIndex = g->current.colorIndex; /* XXX need to apply lighting */
612	/* Don't do this, we're capturing TexCoord ourselves as
613	* we don't have a pincher like the tilesortSPU */
614	/* v->texCoord[0] = g->current.texCoord[0]; */
615
616	/* transform to eye space, then clip space */
617	TRANSFORM_POINTA(v->eyePos, *(t->modelViewStack.top), v->attrib[VERT_ATTRIB_POS]);
618	TRANSFORM_POINT(v->clipPos, *(t->projectionStack.top), v->eyePos);
619
620	switch (g->current.mode) {
621	case GL_POINTS:
622	CRASSERT(g->vCount == 0);
623	feedback_point(v);
624	break;
625	case GL_LINES:
626	if (g->vCount == 0)
627	{
628	g->vCount = 1;
629	}
630	else
631	{
632	CRASSERT(g->vCount == 1);
633	feedback_line(g->vBuffer + 0, g->vBuffer + 1, g->lineReset);
634	g->vCount = 0;
635	}
636	break;
637	case GL_LINE_STRIP:
638	if (g->vCount == 0)
639	{
640	g->vCount = 1;
641	}
642	else
643	{
644	CRASSERT(g->vCount == 1);
645	feedback_line(g->vBuffer + 0, g->vBuffer + 1, g->lineReset);
646	g->vBuffer[0] = g->vBuffer[1];
647	g->lineReset = GL_FALSE;
648	/* leave g->vCount at 1 */
649	}
650	break;
651	case GL_LINE_LOOP:
652	if (g->vCount == 0)
653	{
654	g->lineLoop = GL_FALSE;
655	g->vCount = 1;
656	}
657	else if (g->vCount == 1)
658	{
659	feedback_line(g->vBuffer + 0, g->vBuffer + 1, g->lineReset);
660	g->lineReset = GL_FALSE;
661	g->lineLoop = GL_TRUE;
662	g->vCount = 2;
663	}
664	else
665	{
666	CRASSERT(g->vCount == 2);
667	CRASSERT(g->lineReset == GL_FALSE);
668	g->lineLoop = GL_FALSE;
669	feedback_line(g->vBuffer + 1, g->vBuffer + 2, g->lineReset);
670	g->vBuffer[1] = g->vBuffer[2];
671	/* leave g->vCount at 2 */
672	}
673	break;
674	case GL_TRIANGLES:
675	if (g->vCount == 0 \|\| g->vCount == 1)
676	{
677	g->vCount++;
678	}
679	else
680	{
681	CRASSERT(g->vCount == 2);
682	feedback_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
683	g->vCount = 0;
684	}
685	break;
686	case GL_TRIANGLE_STRIP:
687	if (g->vCount == 0 \|\| g->vCount == 1)
688	{
689	g->vCount++;
690	}
691	else if (g->vCount == 2)
692	{
693	feedback_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
694	g->vCount = 3;
695	}
696	else
697	{
698	CRASSERT(g->vCount == 3);
699	feedback_triangle(g->vBuffer + 1, g->vBuffer + 3, g->vBuffer + 2);
700	g->vBuffer[0] = g->vBuffer[2];
701	g->vBuffer[1] = g->vBuffer[3];
702	g->vCount = 2;
703	}
704	break;
705	case GL_TRIANGLE_FAN:
706	if (g->vCount == 0 \|\| g->vCount == 1)
707	{
708	g->vCount++;
709	}
710	else
711	{
712	CRASSERT(g->vCount == 2);
713	feedback_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
714	g->vBuffer[1] = g->vBuffer[2];
715	/* leave g->vCount = 2 */
716	}
717	break;
718	case GL_QUADS:
719	if (g->vCount < 3)
720	{
721	g->vCount++;
722	}
723	else
724	{
725	CRASSERT(g->vCount == 3);
726	feedback_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
727	feedback_triangle(g->vBuffer + 0, g->vBuffer + 2, g->vBuffer + 3);
728	g->vCount = 0;
729	}
730	break;
731	case GL_QUAD_STRIP:
732	if (g->vCount < 3)
733	{
734	g->vCount++;
735	}
736	else
737	{
738	CRASSERT(g->vCount == 3);
739	feedback_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
740	feedback_triangle(g->vBuffer + 1, g->vBuffer + 3, g->vBuffer + 2);
741	g->vBuffer[0] = g->vBuffer[2];
742	g->vBuffer[1] = g->vBuffer[3];
743	g->vCount = 2;
744	}
745	break;
746	case GL_POLYGON:
747	/* XXX need to observe polygon mode for the above TRI/QUAD prims */
748	switch (p->frontMode) {
749	case GL_POINT:
750	CRASSERT(g->vCount == 0);
751	feedback_point(v);
752	break;
753	case GL_LINE:
754	if (g->vCount == 0)
755	{
756	g->lineLoop = GL_FALSE;
757	g->vCount = 1;
758	}
759	else if (g->vCount == 1)
760	{
761	feedback_line(g->vBuffer + 0, g->vBuffer + 1, g->lineReset);
762	g->lineReset = GL_FALSE;
763	g->lineLoop = GL_TRUE;
764	g->vCount = 2;
765	}
766	else
767	{
768	CRASSERT(g->vCount == 2);
769	CRASSERT(g->lineReset == GL_FALSE);
770	g->lineLoop = GL_FALSE;
771	feedback_line(g->vBuffer + 1, g->vBuffer + 2, g->lineReset);
772	g->vBuffer[1] = g->vBuffer[2];
773	/* leave g->vCount at 2 */
774	}
775	break;
776	case GL_FILL:
777	/* draw as a tri-fan */
778	if (g->vCount == 0 \|\| g->vCount == 1)
779	{
780	g->vCount++;
781	}
782	else
783	{
784	CRASSERT(g->vCount == 2);
785	feedback_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
786	g->vBuffer[1] = g->vBuffer[2];
787	/* leave g->vCount = 2 */
788	}
789	break;
790	default:
791	; /* impossible */
792	}
793	break;
794	default:
795	; /* impossible */
796	}
797	}
798
799
800	void STATE_APIENTRY
801	crStateFeedbackBegin(GLenum mode)
802	{
803	CRContext *g = GetCurrentContext();
804
805	crStateBegin(mode);
806
807	g->vCount = 0;
808	g->lineReset = GL_TRUE;
809	g->lineLoop = GL_FALSE;
810	}
811
812
813	void STATE_APIENTRY
814	crStateFeedbackEnd(void)
815	{
816	CRContext *g = GetCurrentContext();
817
818	if ( (g->current.mode == GL_LINE_LOOP \|\|
819	(g->current.mode == GL_POLYGON && g->polygon.frontMode == GL_LINE))
820	&& g->vCount == 2 )
821	{
822	/* draw the last line segment */
823	if (g->lineLoop)
824	feedback_line(g->vBuffer + 1, g->vBuffer + 0, GL_FALSE);
825	else
826	feedback_line(g->vBuffer + 2, g->vBuffer + 0, GL_FALSE);
827	}
828
829	crStateEnd();
830	}
831
832
833	void STATE_APIENTRY
834	crStateFeedbackBuffer(GLsizei size, GLenum type, GLfloat * buffer)
835	{
836	CRContext *g = GetCurrentContext();
837	CRFeedbackState *f = &(g->feedback);
838
839	if (g->current.inBeginEnd)
840	{
841	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
842	"FeedbackBuffer called in begin/end");
843	return;
844	}
845
846	if (g->renderMode == GL_FEEDBACK)
847	{
848	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
849	"Invalid Operation GL_FEEDBACK");
850	return;
851	}
852	if (size < 0)
853	{
854	crStateError(__LINE__, __FILE__, GL_INVALID_VALUE,
855	"Invalid Value size < 0");
856	return;
857	}
858	if (!buffer)
859	{
860	crStateError(__LINE__, __FILE__, GL_INVALID_VALUE,
861	"Invalid Value buffer = NULL");
862	f->bufferSize = 0;
863	return;
864	}
865
866	FLUSH();
867
868	switch (type)
869	{
870	case GL_2D:
871	f->mask = 0;
872	break;
873	case GL_3D:
874	f->mask = FB_3D;
875	break;
876	case GL_3D_COLOR:
877	f->mask = (FB_3D \| FB_COLOR); /* FB_INDEX ?? */
878	break;
879	case GL_3D_COLOR_TEXTURE:
880	f->mask = (FB_3D \| FB_COLOR \| FB_TEXTURE); /* FB_INDEX ?? */
881	break;
882	case GL_4D_COLOR_TEXTURE:
883	f->mask = (FB_3D \| FB_4D \| FB_COLOR \| FB_TEXTURE); /* FB_INDEX ?? */
884	break;
885	default:
886	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "invalid type");
887	return;
888	}
889
890	f->type = type;
891	f->bufferSize = size;
892	f->buffer = buffer;
893	f->count = 0;
894	}
895
896
897	void STATE_APIENTRY
898	crStatePassThrough(GLfloat token)
899	{
900	CRContext *g = GetCurrentContext();
901	CRFeedbackState *f = &(g->feedback);
902
903	if (g->current.inBeginEnd)
904	{
905	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
906	"PassThrough called in begin/end");
907	return;
908	}
909
910	FLUSH();
911
912	if (g->renderMode == GL_FEEDBACK)
913	{
914	FEEDBACK_TOKEN((GLfloat) (GLint) GL_PASS_THROUGH_TOKEN);
915	FEEDBACK_TOKEN(token);
916	}
917	}
918
919
920	/*
921	* Although these functions are used by the feedbackSPU alone,
922	* I've left them here as they interface to the other functions.....
923	*/
924	void STATE_APIENTRY
925	crStateFeedbackGetBooleanv(GLenum pname, GLboolean * params)
926	{
927	CRContext *g = GetCurrentContext();
928
929	switch (pname)
930	{
931
932	case GL_FEEDBACK_BUFFER_SIZE:
933	params[0] = (GLboolean) (g->feedback.bufferSize != 0);
934	break;
935	case GL_FEEDBACK_BUFFER_TYPE:
936	params[0] = (GLboolean) (g->feedback.type != 0);
937	break;
938	case GL_SELECTION_BUFFER_SIZE:
939	params[0] = (GLboolean) (g->selection.bufferSize != 0);
940	break;
941	default:
942	break;
943	}
944	}
945
946
947	void STATE_APIENTRY
948	crStateFeedbackGetDoublev(GLenum pname, GLdouble * params)
949	{
950	CRContext *g = GetCurrentContext();
951
952	switch (pname)
953	{
954
955	case GL_FEEDBACK_BUFFER_SIZE:
956	params[0] = (GLdouble) g->feedback.bufferSize;
957	break;
958	case GL_FEEDBACK_BUFFER_TYPE:
959	params[0] = (GLdouble) g->feedback.type;
960	break;
961	case GL_SELECTION_BUFFER_SIZE:
962	params[0] = (GLdouble) g->selection.bufferSize;
963	break;
964	default:
965	break;
966	}
967	}
968
969
970	void STATE_APIENTRY
971	crStateFeedbackGetFloatv(GLenum pname, GLfloat * params)
972	{
973	CRContext *g = GetCurrentContext();
974
975	switch (pname)
976	{
977
978	case GL_FEEDBACK_BUFFER_SIZE:
979	params[0] = (GLfloat) g->feedback.bufferSize;
980	break;
981	case GL_FEEDBACK_BUFFER_TYPE:
982	params[0] = (GLfloat) g->feedback.type;
983	break;
984	case GL_SELECTION_BUFFER_SIZE:
985	params[0] = (GLfloat) g->selection.bufferSize;
986	break;
987	default:
988	break;
989	}
990	}
991
992
993	void STATE_APIENTRY
994	crStateFeedbackGetIntegerv(GLenum pname, GLint * params)
995	{
996	CRContext *g = GetCurrentContext();
997
998	switch (pname)
999	{
1000
1001	case GL_FEEDBACK_BUFFER_SIZE:
1002	params[0] = (GLint) g->feedback.bufferSize;
1003	break;
1004	case GL_FEEDBACK_BUFFER_TYPE:
1005	params[0] = (GLint) g->feedback.type;
1006	break;
1007	case GL_SELECTION_BUFFER_SIZE:
1008	params[0] = (GLint) g->selection.bufferSize;
1009	break;
1010	default:
1011	break;
1012	}
1013	}
1014
1015
1016	void STATE_APIENTRY
1017	crStateFeedbackDrawPixels(GLsizei width, GLsizei height, GLenum format,
1018	GLenum type, const GLvoid * pixels)
1019	{
1020	CRContext *g = GetCurrentContext();
1021	CRFeedbackState *f = &(g->feedback);
1022
1023	(void) width;
1024	(void) height;
1025	(void) format;
1026	(void) type;
1027	(void) pixels;
1028
1029	FEEDBACK_TOKEN((GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN);
1030
1031	feedback_rasterpos();
1032	}
1033
1034	void STATE_APIENTRY
1035	crStateFeedbackCopyPixels(GLint x, GLint y, GLsizei width, GLsizei height,
1036	GLenum type)
1037	{
1038	CRContext *g = GetCurrentContext();
1039	CRFeedbackState *f = &(g->feedback);
1040
1041	(void) x;
1042	(void) y;
1043	(void) width;
1044	(void) height;
1045	(void) type;
1046
1047	FEEDBACK_TOKEN((GLfloat) (GLint) GL_COPY_PIXEL_TOKEN);
1048	feedback_rasterpos();
1049	}
1050
1051	void STATE_APIENTRY
1052	crStateFeedbackBitmap(GLsizei width, GLsizei height, GLfloat xorig,
1053	GLfloat yorig, GLfloat xmove, GLfloat ymove,
1054	const GLubyte * bitmap)
1055	{
1056	CRContext *g = GetCurrentContext();
1057	CRFeedbackState *f = &(g->feedback);
1058
1059	(void) width;
1060	(void) height;
1061	(void) bitmap;
1062	(void) xorig;
1063	(void) yorig;
1064
1065	FEEDBACK_TOKEN((GLfloat) (GLint) GL_BITMAP_TOKEN);
1066
1067	feedback_rasterpos();
1068
1069	if (g->current.rasterValid)
1070	{
1071	g->current.rasterAttrib[VERT_ATTRIB_POS][0] += xmove;
1072	g->current.rasterAttrib[VERT_ATTRIB_POS][1] += ymove;
1073	}
1074	}
1075
1076
1077	void STATE_APIENTRY
1078	crStateFeedbackVertex4fv(const GLfloat * v)
1079	{
1080	crStateFeedbackVertex4f(v[0], v[1], v[2], v[3]);
1081	}
1082
1083	void STATE_APIENTRY
1084	crStateFeedbackVertex4s(GLshort v0, GLshort v1, GLshort v2, GLshort v3)
1085	{
1086	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, (GLfloat) v2,
1087	(GLfloat) v3);
1088	}
1089
1090	void STATE_APIENTRY
1091	crStateFeedbackVertex4sv(const GLshort * v)
1092	{
1093	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2],
1094	(GLfloat) v[3]);
1095	}
1096
1097	void STATE_APIENTRY
1098	crStateFeedbackVertex4i(GLint v0, GLint v1, GLint v2, GLint v3)
1099	{
1100	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, (GLfloat) v2,
1101	(GLfloat) v3);
1102	}
1103
1104	void STATE_APIENTRY
1105	crStateFeedbackVertex4iv(const GLint * v)
1106	{
1107	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2],
1108	(GLfloat) v[3]);
1109	}
1110
1111	void STATE_APIENTRY
1112	crStateFeedbackVertex4d(GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3)
1113	{
1114	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, (GLfloat) v2,
1115	(GLfloat) v3);
1116	}
1117
1118	void STATE_APIENTRY
1119	crStateFeedbackVertex4dv(const GLdouble * v)
1120	{
1121	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2],
1122	(GLfloat) v[3]);
1123	}
1124
1125	void STATE_APIENTRY
1126	crStateFeedbackVertex2i(GLint v0, GLint v1)
1127	{
1128	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, 0.0f, 1.0f);
1129	}
1130
1131	void STATE_APIENTRY
1132	crStateFeedbackVertex2iv(const GLint * v)
1133	{
1134	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], 0.0f, 1.0f);
1135	}
1136
1137	void STATE_APIENTRY
1138	crStateFeedbackVertex2s(GLshort v0, GLshort v1)
1139	{
1140	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, 0.0f, 1.0f);
1141	}
1142
1143	void STATE_APIENTRY
1144	crStateFeedbackVertex2sv(const GLshort * v)
1145	{
1146	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], 0.0f, 1.0f);
1147	}
1148
1149	void STATE_APIENTRY
1150	crStateFeedbackVertex2f(GLfloat v0, GLfloat v1)
1151	{
1152	crStateFeedbackVertex4f(v0, v1, 0.0f, 1.0f);
1153	}
1154
1155	void STATE_APIENTRY
1156	crStateFeedbackVertex2fv(const GLfloat * v)
1157	{
1158	crStateFeedbackVertex4f(v[0], v[1], 0.0f, 1.0f);
1159	}
1160
1161	void STATE_APIENTRY
1162	crStateFeedbackVertex2d(GLdouble v0, GLdouble v1)
1163	{
1164	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, 0.0f, 1.0f);
1165	}
1166
1167	void STATE_APIENTRY
1168	crStateFeedbackVertex2dv(const GLdouble * v)
1169	{
1170	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], 0.0f, 1.0f);
1171	}
1172
1173	void STATE_APIENTRY
1174	crStateFeedbackVertex3i(GLint v0, GLint v1, GLint v2)
1175	{
1176	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, (GLfloat) v2, 1.0f);
1177	}
1178
1179	void STATE_APIENTRY
1180	crStateFeedbackVertex3iv(const GLint * v)
1181	{
1182	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0f);
1183	}
1184
1185	void STATE_APIENTRY
1186	crStateFeedbackVertex3s(GLshort v0, GLshort v1, GLshort v2)
1187	{
1188	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, (GLfloat) v2, 1.0f);
1189	}
1190
1191	void STATE_APIENTRY
1192	crStateFeedbackVertex3sv(const GLshort * v)
1193	{
1194	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2],
1195	1.0f);
1196	}
1197
1198	void STATE_APIENTRY
1199	crStateFeedbackVertex3f(GLfloat v0, GLfloat v1, GLfloat v2)
1200	{
1201	crStateFeedbackVertex4f(v0, v1, v2, 1.0f);
1202	}
1203
1204	void STATE_APIENTRY
1205	crStateFeedbackVertex3fv(const GLfloat * v)
1206	{
1207	crStateFeedbackVertex4f(v[0], v[1], v[2], 1.0f);
1208	}
1209
1210	void STATE_APIENTRY
1211	crStateFeedbackVertex3d(GLdouble v0, GLdouble v1, GLdouble v2)
1212	{
1213	crStateFeedbackVertex4f((GLfloat) v0, (GLfloat) v1, (GLfloat) v2, 1.0f);
1214	}
1215
1216	void STATE_APIENTRY
1217	crStateFeedbackVertex3dv(const GLdouble * v)
1218	{
1219	crStateFeedbackVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2],
1220	1.0f);
1221	}
1222
1223	void STATE_APIENTRY
1224	crStateFeedbackTexCoord4f( GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3 )
1225	{
1226	CRContext *g = GetCurrentContext();
1227	CRVertex *v = g->vBuffer + g->vCount;
1228
1229	/* store the texCoord in the current vertex */
1230	v->attrib[VERT_ATTRIB_TEX0][0] = v0;
1231	v->attrib[VERT_ATTRIB_TEX0][1] = v1;
1232	v->attrib[VERT_ATTRIB_TEX0][2] = v2;
1233	v->attrib[VERT_ATTRIB_TEX0][3] = v3;
1234	}
1235
1236	void STATE_APIENTRY
1237	crStateFeedbackTexCoord4fv( const GLfloat *v )
1238	{
1239	crStateFeedbackTexCoord4f( v[0], v[1], v[2], v[3] );
1240	}
1241
1242	void STATE_APIENTRY
1243	crStateFeedbackTexCoord4s( GLshort v0, GLshort v1, GLshort v2, GLshort v3 )
1244	{
1245	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, (GLfloat)v2, (GLfloat)v3 );
1246	}
1247
1248	void STATE_APIENTRY
1249	crStateFeedbackTexCoord4sv( const GLshort *v )
1250	{
1251	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2], (GLfloat)v[3] );
1252	}
1253
1254	void STATE_APIENTRY
1255	crStateFeedbackTexCoord4i( GLint v0, GLint v1, GLint v2, GLint v3 )
1256	{
1257	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, (GLfloat)v2, (GLfloat)v3 );
1258	}
1259
1260	void STATE_APIENTRY
1261	crStateFeedbackTexCoord4iv( const GLint *v )
1262	{
1263	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2], (GLfloat)v[3] );
1264	}
1265
1266	void STATE_APIENTRY
1267	crStateFeedbackTexCoord4d( GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3 )
1268	{
1269	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, (GLfloat)v2, (GLfloat)v3 );
1270	}
1271
1272	void STATE_APIENTRY
1273	crStateFeedbackTexCoord4dv( const GLdouble *v )
1274	{
1275	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2], (GLfloat)v[3] );
1276	}
1277
1278	void STATE_APIENTRY
1279	crStateFeedbackTexCoord1i( GLint v0 )
1280	{
1281	crStateFeedbackTexCoord4f( (GLfloat)v0, 0.0f, 0.0f, 1.0f );
1282	}
1283
1284	void STATE_APIENTRY
1285	crStateFeedbackTexCoord1iv( const GLint *v )
1286	{
1287	crStateFeedbackTexCoord4f( (GLfloat)v[0], 0.0f, 0.0f, 1.0f );
1288	}
1289
1290	void STATE_APIENTRY
1291	crStateFeedbackTexCoord1s( GLshort v0 )
1292	{
1293	crStateFeedbackTexCoord4f( (GLfloat)v0, 0.0f, 0.0f, 1.0f );
1294	}
1295
1296	void STATE_APIENTRY
1297	crStateFeedbackTexCoord1sv( const GLshort *v )
1298	{
1299	crStateFeedbackTexCoord4f( (GLfloat)v[0], 0.0f, 0.0f, 1.0f );
1300	}
1301
1302	void STATE_APIENTRY
1303	crStateFeedbackTexCoord1f( GLfloat v0 )
1304	{
1305	crStateFeedbackTexCoord4f( v0, 0.0f, 0.0f, 1.0f );
1306	}
1307
1308	void STATE_APIENTRY
1309	crStateFeedbackTexCoord1fv( const GLfloat *v )
1310	{
1311	crStateFeedbackTexCoord4f( v[0], 0.0f, 0.0f, 1.0f );
1312	}
1313
1314	void STATE_APIENTRY
1315	crStateFeedbackTexCoord1d( GLdouble v0 )
1316	{
1317	crStateFeedbackTexCoord4f( (GLfloat)v0, 0.0f, 0.0f, 1.0f );
1318	}
1319
1320	void STATE_APIENTRY
1321	crStateFeedbackTexCoord1dv( const GLdouble *v )
1322	{
1323	crStateFeedbackTexCoord4f( (GLfloat)v[0], 0.0f, 0.0f, 1.0f );
1324	}
1325
1326	void STATE_APIENTRY
1327	crStateFeedbackTexCoord2i( GLint v0, GLint v1 )
1328	{
1329	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, 0.0f, 1.0f );
1330	}
1331
1332	void STATE_APIENTRY
1333	crStateFeedbackTexCoord2iv( const GLint *v )
1334	{
1335	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], 0.0f, 1.0f );
1336	}
1337
1338	void STATE_APIENTRY
1339	crStateFeedbackTexCoord2s( GLshort v0, GLshort v1 )
1340	{
1341	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, 0.0f, 1.0f );
1342	}
1343
1344	void STATE_APIENTRY
1345	crStateFeedbackTexCoord2sv( const GLshort *v )
1346	{
1347	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], 0.0f, 1.0f );
1348	}
1349
1350	void STATE_APIENTRY
1351	crStateFeedbackTexCoord2f( GLfloat v0, GLfloat v1 )
1352	{
1353	crStateFeedbackTexCoord4f( v0, v1, 0.0f, 1.0f );
1354	}
1355
1356	void STATE_APIENTRY
1357	crStateFeedbackTexCoord2fv( const GLfloat *v )
1358	{
1359	crStateFeedbackTexCoord4f( v[0], v[1], 0.0f, 1.0f );
1360	}
1361
1362	void STATE_APIENTRY
1363	crStateFeedbackTexCoord2d( GLdouble v0, GLdouble v1 )
1364	{
1365	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, 0.0f, 1.0f );
1366	}
1367
1368	void STATE_APIENTRY
1369	crStateFeedbackTexCoord2dv( const GLdouble *v )
1370	{
1371	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], 0.0f, 1.0f );
1372	}
1373
1374	void STATE_APIENTRY
1375	crStateFeedbackTexCoord3i( GLint v0, GLint v1, GLint v2 )
1376	{
1377	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, (GLfloat)v2, 1.0f );
1378	}
1379
1380	void STATE_APIENTRY
1381	crStateFeedbackTexCoord3iv( const GLint *v )
1382	{
1383	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], 0.0f, 1.0f );
1384	}
1385
1386	void STATE_APIENTRY
1387	crStateFeedbackTexCoord3s( GLshort v0, GLshort v1, GLshort v2 )
1388	{
1389	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, (GLfloat)v2, 1.0f );
1390	}
1391
1392	void STATE_APIENTRY
1393	crStateFeedbackTexCoord3sv( const GLshort *v )
1394	{
1395	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2], 1.0f );
1396	}
1397
1398	void STATE_APIENTRY
1399	crStateFeedbackTexCoord3f( GLfloat v0, GLfloat v1, GLfloat v2 )
1400	{
1401	crStateFeedbackTexCoord4f( v0, v1, v2, 1.0f );
1402	}
1403
1404	void STATE_APIENTRY
1405	crStateFeedbackTexCoord3fv( const GLfloat *v )
1406	{
1407	crStateFeedbackTexCoord4f( v[0], v[1], v[2], 1.0f );
1408	}
1409
1410	void STATE_APIENTRY
1411	crStateFeedbackTexCoord3d( GLdouble v0, GLdouble v1, GLdouble v2 )
1412	{
1413	crStateFeedbackTexCoord4f( (GLfloat)v0, (GLfloat)v1, (GLfloat)v2, 1.0f );
1414	}
1415
1416	void STATE_APIENTRY
1417	crStateFeedbackTexCoord3dv( const GLdouble *v )
1418	{
1419	crStateFeedbackTexCoord4f( (GLfloat)v[0], (GLfloat)v[1], (GLfloat)v[2], 1.0f );
1420	}
1421
1422	void STATE_APIENTRY
1423	crStateFeedbackRectf(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1)
1424	{
1425	crStateFeedbackBegin(GL_QUADS);
1426	crStateFeedbackVertex2f(x0, y0);
1427	crStateFeedbackVertex2f(x0, y1);
1428	crStateFeedbackVertex2f(x1, y1);
1429	crStateFeedbackVertex2f(x1, y0);
1430	crStateFeedbackEnd();
1431	}
1432
1433	void STATE_APIENTRY
1434	crStateFeedbackRecti(GLint x0, GLint y0, GLint x1, GLint y1)
1435	{
1436	crStateFeedbackRectf((GLfloat) x0, (GLfloat) y0, (GLfloat) x1, (GLfloat) y1);
1437	}
1438
1439	void STATE_APIENTRY
1440	crStateFeedbackRectd(GLdouble x0, GLdouble y0, GLdouble x1, GLdouble y1)
1441	{
1442	crStateFeedbackRectf((GLfloat) x0, (GLfloat) y0, (GLfloat) x1, (GLfloat) y1);
1443	}
1444
1445	void STATE_APIENTRY
1446	crStateFeedbackRects(GLshort x0, GLshort y0, GLshort x1, GLshort y1)
1447	{
1448	crStateFeedbackRectf((GLfloat) x0, (GLfloat) y0, (GLfloat) x1, (GLfloat) y1);
1449	}
1450
1451	void STATE_APIENTRY
1452	crStateFeedbackRectiv(const GLint v0, const GLint v1)
1453	{
1454	crStateFeedbackRectf((GLfloat) v0[0], (GLfloat) v0[1], (GLfloat) v1[0], (GLfloat) v1[1]);
1455	}
1456
1457	void STATE_APIENTRY
1458	crStateFeedbackRectfv(const GLfloat v0, const GLfloat v1)
1459	{
1460	crStateFeedbackRectf(v0[0], v0[1], v1[0], v1[1]);
1461	}
1462
1463	void STATE_APIENTRY
1464	crStateFeedbackRectdv(const GLdouble v0, const GLdouble v1)
1465	{
1466	crStateFeedbackRectf((GLfloat) v0[0], (GLfloat) v0[1], (GLfloat) v1[0], (GLfloat) v1[1]);
1467	}
1468
1469	void STATE_APIENTRY
1470	crStateFeedbackRectsv(const GLshort v0, const GLshort v1)
1471	{
1472	crStateFeedbackRectf((GLfloat) v0[0], (GLfloat) v0[1], (GLfloat) v1[0], (GLfloat) v1[1]);
1473	}
1474
1475	/**********************************************************************/
1476	/*** Selection ***/
1477	/**********************************************************************/
1478
1479
1480	void STATE_APIENTRY
1481	crStateSelectBuffer(GLsizei size, GLuint * buffer)
1482	{
1483	CRContext *g = GetCurrentContext();
1484	CRSelectionState *se = &(g->selection);
1485
1486	if (g->current.inBeginEnd)
1487	{
1488	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1489	"SelectBuffer called in begin/end");
1490	return;
1491	}
1492
1493	if (g->renderMode == GL_SELECT)
1494	{
1495	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1496	"SelectBuffer called with RenderMode = GL_SELECT");
1497	return;
1498	}
1499
1500	FLUSH();
1501
1502	se->buffer = buffer;
1503	se->bufferSize = size;
1504	se->bufferCount = 0;
1505	se->hitFlag = GL_FALSE;
1506	se->hitMinZ = 1.0;
1507	se->hitMaxZ = 0.0;
1508	}
1509
1510
1511	#define WRITE_RECORD( V ) \
1512	if (se->bufferCount < se->bufferSize) { \
1513	se->buffer[se->bufferCount] = (V); \
1514	} \
1515	se->bufferCount++;
1516
1517
1518	static void
1519	write_hit_record(CRSelectionState * se)
1520	{
1521	GLuint i;
1522	GLuint zmin, zmax, zscale = (~0u);
1523
1524	/* hitMinZ and hitMaxZ are in [0,1]. Multiply these values by */
1525	/* 2^32-1 and round to nearest unsigned integer. */
1526
1527	zmin = (GLuint) ((GLfloat) zscale * se->hitMinZ);
1528	zmax = (GLuint) ((GLfloat) zscale * se->hitMaxZ);
1529
1530	WRITE_RECORD(se->nameStackDepth);
1531	WRITE_RECORD(zmin);
1532	WRITE_RECORD(zmax);
1533	for (i = 0; i < se->nameStackDepth; i++)
1534	{
1535	WRITE_RECORD(se->nameStack[i]);
1536	}
1537
1538	se->hits++;
1539	se->hitFlag = GL_FALSE;
1540	se->hitMinZ = 1.0;
1541	se->hitMaxZ = -1.0;
1542	}
1543
1544
1545
1546	void STATE_APIENTRY
1547	crStateInitNames(void)
1548	{
1549	CRContext *g = GetCurrentContext();
1550	CRSelectionState *se = &(g->selection);
1551
1552	if (g->current.inBeginEnd)
1553	{
1554	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1555	"InitNames called in begin/end");
1556	return;
1557	}
1558
1559	FLUSH();
1560
1561	/* Record the hit before the hitFlag is wiped out again. */
1562	if (g->renderMode == GL_SELECT)
1563	{
1564	if (se->hitFlag)
1565	{
1566	write_hit_record(se);
1567	}
1568	}
1569
1570	se->nameStackDepth = 0;
1571	se->hitFlag = GL_FALSE;
1572	se->hitMinZ = 1.0;
1573	se->hitMaxZ = 0.0;
1574	}
1575
1576
1577	void STATE_APIENTRY
1578	crStateLoadName(GLuint name)
1579	{
1580	CRContext *g = GetCurrentContext();
1581	CRSelectionState *se = &(g->selection);
1582
1583	if (g->current.inBeginEnd)
1584	{
1585	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1586	"LoadName called in begin/end");
1587	return;
1588	}
1589
1590
1591	if (g->renderMode != GL_SELECT)
1592	{
1593	return;
1594	}
1595
1596	if (se->nameStackDepth == 0)
1597	{
1598	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1599	"nameStackDepth = 0");
1600	return;
1601	}
1602
1603	FLUSH();
1604
1605	if (se->hitFlag)
1606	{
1607	write_hit_record(se);
1608	}
1609	if (se->nameStackDepth < MAX_NAME_STACK_DEPTH)
1610	{
1611	se->nameStack[se->nameStackDepth - 1] = name;
1612	}
1613	else
1614	{
1615	se->nameStack[MAX_NAME_STACK_DEPTH - 1] = name;
1616	}
1617	}
1618
1619
1620	void STATE_APIENTRY
1621	crStatePushName(GLuint name)
1622	{
1623	CRContext *g = GetCurrentContext();
1624	CRSelectionState *se = &(g->selection);
1625
1626	if (g->current.inBeginEnd)
1627	{
1628	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1629	"PushName called in begin/end");
1630	return;
1631	}
1632
1633
1634	if (g->renderMode != GL_SELECT)
1635	{
1636	return;
1637	}
1638
1639	FLUSH();
1640
1641	if (se->hitFlag)
1642	{
1643	write_hit_record(se);
1644	}
1645	if (se->nameStackDepth >= MAX_NAME_STACK_DEPTH)
1646	{
1647	crStateError(__LINE__, __FILE__, GL_STACK_OVERFLOW,
1648	"nameStackDepth overflow");
1649	}
1650	else
1651	se->nameStack[se->nameStackDepth++] = name;
1652	}
1653
1654	void STATE_APIENTRY
1655	crStatePopName(void)
1656	{
1657	CRContext *g = GetCurrentContext();
1658	CRSelectionState *se = &(g->selection);
1659
1660	if (g->current.inBeginEnd)
1661	{
1662	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
1663	"PopName called in begin/end");
1664	return;
1665	}
1666
1667	if (g->renderMode != GL_SELECT)
1668	{
1669	return;
1670	}
1671
1672	FLUSH();
1673
1674	if (se->hitFlag)
1675	{
1676	write_hit_record(se);
1677	}
1678
1679	if (se->nameStackDepth == 0)
1680	{
1681	crStateError(__LINE__, __FILE__, GL_STACK_UNDERFLOW,
1682	"nameStackDepth underflow");
1683	}
1684	else
1685	se->nameStackDepth--;
1686	}
1687
1688
1689	static void
1690	update_hitflag(GLfloat z)
1691	{
1692	CRContext *g = GetCurrentContext();
1693	CRSelectionState *se = &(g->selection);
1694
1695	se->hitFlag = GL_TRUE;
1696
1697	if (z < se->hitMinZ)
1698	se->hitMinZ = z;
1699
1700	if (z > se->hitMaxZ)
1701	se->hitMaxZ = z;
1702	}
1703
1704
1705	static void
1706	select_rasterpos(void)
1707	{
1708	CRContext *g = GetCurrentContext();
1709
1710	if (g->current.rasterValid)
1711	update_hitflag(g->current.rasterAttrib[VERT_ATTRIB_POS][2]);
1712	}
1713
1714	static void
1715	select_point(const CRVertex *v)
1716	{
1717	CRContext *g = GetCurrentContext();
1718	if (clip_point(v) == 0)
1719	{
1720	CRVertex c = *v;
1721	MAP_POINT(c.winPos, c.clipPos, g->viewport);
1722	update_hitflag(c.winPos.z);
1723	}
1724	}
1725
1726
1727	static void
1728	select_line(const CRVertex v0, const CRVertex v1)
1729	{
1730	CRContext *g = GetCurrentContext();
1731	CRVertex c0, c1;
1732	if (clip_line(v0, v1, &c0, &c1))
1733	{
1734	MAP_POINT(c0.winPos, c0.clipPos, g->viewport);
1735	MAP_POINT(c1.winPos, c1.clipPos, g->viewport);
1736	update_hitflag(c0.winPos.z);
1737	update_hitflag(c1.winPos.z);
1738	}
1739	}
1740
1741
1742	static void
1743	select_triangle(const CRVertex *v0,
1744	const CRVertex *v1,
1745	const CRVertex *v2)
1746	{
1747	CRContext *g = GetCurrentContext();
1748	CRVertex vlist[3], vclipped[8];
1749	GLuint i, n;
1750
1751	vlist[0] = *v0;
1752	vlist[1] = *v1;
1753	vlist[2] = *v2;
1754	n = clip_polygon(vlist, 3, vclipped);
1755	for (i = 0; i < n; i++) {
1756	MAP_POINT(vclipped[i].winPos, vclipped[i].clipPos, g->viewport);
1757	update_hitflag(vclipped[i].winPos.z);
1758	}
1759	}
1760
1761
1762	void STATE_APIENTRY
1763	crStateSelectVertex4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
1764	{
1765	CRContext *g = GetCurrentContext();
1766	CRTransformState *t = &(g->transform);
1767	CRVertex *v = g->vBuffer + g->vCount;
1768
1769	/* store the vertex */
1770	v->attrib[VERT_ATTRIB_POS][0] = x;
1771	v->attrib[VERT_ATTRIB_POS][1] = y;
1772	v->attrib[VERT_ATTRIB_POS][2] = z;
1773	v->attrib[VERT_ATTRIB_POS][3] = w;
1774	COPY_4V(v->attrib[VERT_ATTRIB_COLOR0] , g->current.vertexAttrib[VERT_ATTRIB_COLOR0]); /* XXX need to apply lighting */
1775	v->colorIndex = g->current.colorIndex; /* XXX need to apply lighting */
1776	/* Don't do this, we're capturing TexCoord ourselves as
1777	* we don't have a pincher like the tilesortSPU */
1778	/* v->texCoord[0] = g->current.texCoord[0]; */
1779
1780	/* transform to eye space, then clip space */
1781	TRANSFORM_POINTA(v->eyePos, *(t->modelViewStack.top), v->attrib[VERT_ATTRIB_POS]);
1782	TRANSFORM_POINT(v->clipPos, *(t->projectionStack.top), v->eyePos);
1783
1784	switch (g->current.mode) {
1785	case GL_POINTS:
1786	CRASSERT(g->vCount == 0);
1787	select_point(v);
1788	break;
1789	case GL_LINES:
1790	if (g->vCount == 0)
1791	{
1792	g->vCount = 1;
1793	}
1794	else
1795	{
1796	CRASSERT(g->vCount == 1);
1797	select_line(g->vBuffer + 0, g->vBuffer + 1);
1798	g->vCount = 0;
1799	}
1800	break;
1801	case GL_LINE_STRIP:
1802	if (g->vCount == 0)
1803	{
1804	g->vCount = 1;
1805	}
1806	else
1807	{
1808	CRASSERT(g->vCount == 1);
1809	select_line(g->vBuffer + 0, g->vBuffer + 1);
1810	g->vBuffer[0] = g->vBuffer[1];
1811	/* leave g->vCount at 1 */
1812	}
1813	break;
1814	case GL_LINE_LOOP:
1815	if (g->vCount == 0)
1816	{
1817	g->vCount = 1;
1818	g->lineLoop = GL_FALSE;
1819	}
1820	else if (g->vCount == 1)
1821	{
1822	select_line(g->vBuffer + 0, g->vBuffer + 1);
1823	g->lineLoop = GL_TRUE;
1824	g->vCount = 2;
1825	}
1826	else
1827	{
1828	CRASSERT(g->vCount == 2);
1829	g->lineLoop = GL_FALSE;
1830	select_line(g->vBuffer + 1, g->vBuffer + 2);
1831	g->vBuffer[1] = g->vBuffer[2];
1832	/* leave g->vCount at 2 */
1833	}
1834	break;
1835	case GL_TRIANGLES:
1836	if (g->vCount == 0 \|\| g->vCount == 1)
1837	{
1838	g->vCount++;
1839	}
1840	else
1841	{
1842	CRASSERT(g->vCount == 2);
1843	select_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
1844	g->vCount = 0;
1845	}
1846	break;
1847	case GL_TRIANGLE_STRIP:
1848	if (g->vCount == 0 \|\| g->vCount == 1)
1849	{
1850	g->vCount++;
1851	}
1852	else if (g->vCount == 2)
1853	{
1854	select_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
1855	g->vCount = 3;
1856	}
1857	else
1858	{
1859	CRASSERT(g->vCount == 3);
1860	select_triangle(g->vBuffer + 1, g->vBuffer + 3, g->vBuffer + 2);
1861	g->vBuffer[0] = g->vBuffer[2];
1862	g->vBuffer[1] = g->vBuffer[3];
1863	g->vCount = 2;
1864	}
1865	break;
1866	case GL_TRIANGLE_FAN:
1867	if (g->vCount == 0 \|\| g->vCount == 1)
1868	{
1869	g->vCount++;
1870	}
1871	else
1872	{
1873	CRASSERT(g->vCount == 2);
1874	select_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
1875	g->vBuffer[1] = g->vBuffer[2];
1876	/* leave g->vCount = 2 */
1877	}
1878	break;
1879	case GL_QUADS:
1880	if (g->vCount < 3)
1881	{
1882	g->vCount++;
1883	}
1884	else
1885	{
1886	CRASSERT(g->vCount == 3);
1887	select_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
1888	select_triangle(g->vBuffer + 0, g->vBuffer + 2, g->vBuffer + 3);
1889	g->vCount = 0;
1890	}
1891	break;
1892	case GL_QUAD_STRIP:
1893	if (g->vCount < 3)
1894	{
1895	g->vCount++;
1896	}
1897	else
1898	{
1899	CRASSERT(g->vCount == 3);
1900	select_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
1901	select_triangle(g->vBuffer + 1, g->vBuffer + 3, g->vBuffer + 2);
1902	g->vBuffer[0] = g->vBuffer[2];
1903	g->vBuffer[1] = g->vBuffer[3];
1904	g->vCount = 2;
1905	}
1906	break;
1907	case GL_POLYGON:
1908	/* draw as a tri-fan */
1909	if (g->vCount == 0 \|\| g->vCount == 1)
1910	{
1911	g->vCount++;
1912	}
1913	else
1914	{
1915	CRASSERT(g->vCount == 2);
1916	select_triangle(g->vBuffer + 0, g->vBuffer + 1, g->vBuffer + 2);
1917	g->vBuffer[1] = g->vBuffer[2];
1918	/* leave g->vCount = 2 */
1919	}
1920	break;
1921	default:
1922	; /* impossible */
1923	}
1924	}
1925
1926	void STATE_APIENTRY
1927	crStateSelectRasterPos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
1928	{
1929	crStateRasterPos4f( x, y, z, w );
1930
1931	select_rasterpos();
1932	}
1933
1934	void STATE_APIENTRY
1935	crStateSelectBegin(GLenum mode)
1936	{
1937	CRContext *g = GetCurrentContext();
1938
1939	crStateBegin(mode);
1940
1941	g->vCount = 0;
1942	g->lineReset = GL_TRUE;
1943	g->lineLoop = GL_FALSE;
1944	}
1945
1946
1947	void STATE_APIENTRY
1948	crStateSelectEnd(void)
1949	{
1950	CRContext *g = GetCurrentContext();
1951
1952	if (g->current.mode == GL_LINE_LOOP && g->vCount == 2)
1953	{
1954	/* draw the last line segment */
1955	select_line(g->vBuffer + 1, g->vBuffer + 0);
1956	}
1957
1958	crStateEnd();
1959	}
1960
1961	void STATE_APIENTRY
1962	crStateSelectVertex2d(GLdouble x, GLdouble y)
1963	{
1964	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, 0.0, 1.0);
1965	}
1966
1967	void STATE_APIENTRY
1968	crStateSelectVertex2dv(const GLdouble * v)
1969	{
1970	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], 0.0, 1.0);
1971	}
1972
1973	void STATE_APIENTRY
1974	crStateSelectVertex2f(GLfloat x, GLfloat y)
1975	{
1976	crStateSelectVertex4f(x, y, 0.0, 1.0);
1977	}
1978
1979	void STATE_APIENTRY
1980	crStateSelectVertex2fv(const GLfloat * v)
1981	{
1982	crStateSelectVertex4f(v[0], v[1], 0.0, 1.0);
1983	}
1984
1985	void STATE_APIENTRY
1986	crStateSelectVertex2i(GLint x, GLint y)
1987	{
1988	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, 0.0, 1.0);
1989	}
1990
1991	void STATE_APIENTRY
1992	crStateSelectVertex2iv(const GLint * v)
1993	{
1994	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], 0.0, 1.0);
1995	}
1996
1997	void STATE_APIENTRY
1998	crStateSelectVertex2s(GLshort x, GLshort y)
1999	{
2000	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, 0.0, 1.0);
2001	}
2002
2003	void STATE_APIENTRY
2004	crStateSelectVertex2sv(const GLshort * v)
2005	{
2006	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], 0.0, 1.0);
2007	}
2008
2009	void STATE_APIENTRY
2010	crStateSelectVertex3d(GLdouble x, GLdouble y, GLdouble z)
2011	{
2012	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0);
2013	}
2014
2015	void STATE_APIENTRY
2016	crStateSelectVertex3dv(const GLdouble * v)
2017	{
2018	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0);
2019	}
2020
2021	void STATE_APIENTRY
2022	crStateSelectVertex3f(GLfloat x, GLfloat y, GLfloat z)
2023	{
2024	crStateSelectVertex4f(x, y, z, 1.0);
2025	}
2026
2027	void STATE_APIENTRY
2028	crStateSelectVertex3fv(const GLfloat * v)
2029	{
2030	crStateSelectVertex4f(v[0], v[1], v[2], 1.0);
2031	}
2032
2033	void STATE_APIENTRY
2034	crStateSelectVertex3i(GLint x, GLint y, GLint z)
2035	{
2036	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0);
2037	}
2038
2039	void STATE_APIENTRY
2040	crStateSelectVertex3iv(const GLint * v)
2041	{
2042	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0);
2043	}
2044
2045	void STATE_APIENTRY
2046	crStateSelectVertex3s(GLshort x, GLshort y, GLshort z)
2047	{
2048	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0);
2049	}
2050
2051	void STATE_APIENTRY
2052	crStateSelectVertex3sv(const GLshort * v)
2053	{
2054	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0);
2055	}
2056
2057	void STATE_APIENTRY
2058	crStateSelectVertex4d(GLdouble x, GLdouble y, GLdouble z, GLdouble w)
2059	{
2060	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
2061	}
2062
2063	void STATE_APIENTRY
2064	crStateSelectVertex4dv(const GLdouble * v)
2065	{
2066	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], (GLfloat) v[3]);
2067	}
2068
2069	void STATE_APIENTRY
2070	crStateSelectVertex4fv(const GLfloat * v)
2071	{
2072	crStateSelectVertex4f(v[0], v[1], v[2], v[3]);
2073	}
2074
2075	void STATE_APIENTRY
2076	crStateSelectVertex4i(GLint x, GLint y, GLint z, GLint w)
2077	{
2078	crStateSelectVertex4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
2079	}
2080
2081	void STATE_APIENTRY
2082	crStateSelectVertex4iv(const GLint * v)
2083	{
2084	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], (GLfloat) v[3]);
2085	}
2086
2087	void STATE_APIENTRY
2088	crStateSelectVertex4s(GLshort x, GLshort y, GLshort z, GLshort w)
2089	{
2090	crStateSelectVertex4f(x, y, z, w);
2091	}
2092
2093	void STATE_APIENTRY
2094	crStateSelectVertex4sv(const GLshort * v)
2095	{
2096	crStateSelectVertex4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], (GLfloat) v[3]);
2097	}
2098
2099	void STATE_APIENTRY
2100	crStateSelectRasterPos2d(GLdouble x, GLdouble y)
2101	{
2102	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, 0.0, 1.0);
2103	}
2104
2105	void STATE_APIENTRY
2106	crStateSelectRasterPos2dv(const GLdouble * v)
2107	{
2108	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], 0.0, 1.0);
2109	}
2110
2111	void STATE_APIENTRY
2112	crStateSelectRasterPos2f(GLfloat x, GLfloat y)
2113	{
2114	crStateSelectRasterPos4f(x, y, 0.0, 1.0);
2115	}
2116
2117	void STATE_APIENTRY
2118	crStateSelectRasterPos2fv(const GLfloat * v)
2119	{
2120	crStateSelectRasterPos4f(v[0], v[1], 0.0, 1.0);
2121	}
2122
2123	void STATE_APIENTRY
2124	crStateSelectRasterPos2i(GLint x, GLint y)
2125	{
2126	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, 0.0, 1.0);
2127	}
2128
2129	void STATE_APIENTRY
2130	crStateSelectRasterPos2iv(const GLint * v)
2131	{
2132	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], 0.0, 1.0);
2133	}
2134
2135	void STATE_APIENTRY
2136	crStateSelectRasterPos2s(GLshort x, GLshort y)
2137	{
2138	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, 0.0, 1.0);
2139	}
2140
2141	void STATE_APIENTRY
2142	crStateSelectRasterPos2sv(const GLshort * v)
2143	{
2144	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], 0.0, 1.0);
2145	}
2146
2147	void STATE_APIENTRY
2148	crStateSelectRasterPos3d(GLdouble x, GLdouble y, GLdouble z)
2149	{
2150	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0);
2151	}
2152
2153	void STATE_APIENTRY
2154	crStateSelectRasterPos3dv(const GLdouble * v)
2155	{
2156	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] , 1.0);
2157	}
2158
2159	void STATE_APIENTRY
2160	crStateSelectRasterPos3f(GLfloat x, GLfloat y, GLfloat z)
2161	{
2162	crStateSelectRasterPos4f(x, y, z, 1.0);
2163	}
2164
2165	void STATE_APIENTRY
2166	crStateSelectRasterPos3fv(const GLfloat * v)
2167	{
2168	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] , 1.0);
2169	}
2170
2171	void STATE_APIENTRY
2172	crStateSelectRasterPos3i(GLint x, GLint y, GLint z)
2173	{
2174	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0);
2175	}
2176
2177	void STATE_APIENTRY
2178	crStateSelectRasterPos3iv(const GLint * v)
2179	{
2180	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] , 1.0);
2181	}
2182
2183	void STATE_APIENTRY
2184	crStateSelectRasterPos3s(GLshort x, GLshort y, GLshort z)
2185	{
2186	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0);
2187	}
2188
2189	void STATE_APIENTRY
2190	crStateSelectRasterPos3sv(const GLshort * v)
2191	{
2192	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] , 1.0);
2193	}
2194
2195	void STATE_APIENTRY
2196	crStateSelectRasterPos4d(GLdouble x, GLdouble y, GLdouble z, GLdouble w)
2197	{
2198	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
2199	}
2200
2201	void STATE_APIENTRY
2202	crStateSelectRasterPos4dv(const GLdouble * v)
2203	{
2204	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] , (GLfloat) v[3]);
2205	}
2206
2207	void STATE_APIENTRY
2208	crStateSelectRasterPos4fv(const GLfloat * v)
2209	{
2210	crStateSelectRasterPos4f(v[0], v[1], v[2], v[3]);
2211	}
2212
2213	void STATE_APIENTRY
2214	crStateSelectRasterPos4i(GLint x, GLint y, GLint z, GLint w)
2215	{
2216	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
2217	}
2218
2219	void STATE_APIENTRY
2220	crStateSelectRasterPos4iv(const GLint * v)
2221	{
2222	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], (GLfloat) v[3]);
2223	}
2224
2225	void STATE_APIENTRY
2226	crStateSelectRasterPos4s(GLshort x, GLshort y, GLshort z, GLshort w)
2227	{
2228	crStateSelectRasterPos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
2229	}
2230
2231	void STATE_APIENTRY
2232	crStateSelectRasterPos4sv(const GLshort * v)
2233	{
2234	crStateSelectRasterPos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] , (GLfloat) v[3]);
2235	}
2236
2237	void STATE_APIENTRY
2238	crStateSelectRectf(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1)
2239	{
2240	crStateSelectBegin(GL_QUADS);
2241	crStateSelectVertex2f(x0, y0);
2242	crStateSelectVertex2f(x0, y1);
2243	crStateSelectVertex2f(x1, y1);
2244	crStateSelectVertex2f(x1, y0);
2245	crStateSelectEnd();
2246	}
2247
2248	void STATE_APIENTRY
2249	crStateSelectRecti(GLint x0, GLint y0, GLint x1, GLint y1)
2250	{
2251	crStateSelectRectf((GLfloat) x0, (GLfloat) y0, (GLfloat) x1, (GLfloat) y1);
2252	}
2253
2254	void STATE_APIENTRY
2255	crStateSelectRectd(GLdouble x0, GLdouble y0, GLdouble x1, GLdouble y1)
2256	{
2257	crStateSelectRectf((GLfloat) x0, (GLfloat) y0, (GLfloat) x1, (GLfloat) y1);
2258	}
2259
2260	void STATE_APIENTRY
2261	crStateSelectRects(GLshort x0, GLshort y0, GLshort x1, GLshort y1)
2262	{
2263	crStateSelectRectf((GLfloat) x0, (GLfloat) y0, (GLfloat) x1, (GLfloat) y1);
2264	}
2265
2266	void STATE_APIENTRY
2267	crStateSelectRectiv(const GLint v0, const GLint v1)
2268	{
2269	crStateSelectRectf((GLfloat) v0[0], (GLfloat) v0[1], (GLfloat) v1[0], (GLfloat) v1[1]);
2270	}
2271
2272	void STATE_APIENTRY
2273	crStateSelectRectfv(const GLfloat v0, const GLfloat v1)
2274	{
2275	crStateSelectRectf(v0[0], v0[1], v1[0], v1[1]);
2276	}
2277
2278	void STATE_APIENTRY
2279	crStateSelectRectdv(const GLdouble v0, const GLdouble v1)
2280	{
2281	crStateSelectRectf((GLfloat) v0[0], (GLfloat) v0[1], (GLfloat) v1[0], (GLfloat) v1[1]);
2282	}
2283
2284	void STATE_APIENTRY
2285	crStateSelectRectsv(const GLshort v0, const GLshort v1)
2286	{
2287	crStateSelectRectf((GLfloat) v0[0], (GLfloat) v0[1], (GLfloat) v1[0], (GLfloat) v1[1]);
2288	}
2289
2290
2291	GLint STATE_APIENTRY
2292	crStateRenderMode(GLenum mode)
2293	{
2294	CRContext *g = GetCurrentContext();
2295	CRFeedbackState *f = &(g->feedback);
2296	CRSelectionState *se = &(g->selection);
2297	GLint result;
2298
2299	if (g->current.inBeginEnd)
2300	{
2301	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
2302	"RenderMode called in begin/end");
2303	return 0;
2304	}
2305
2306	FLUSH();
2307
2308	switch (g->renderMode)
2309	{
2310	case GL_RENDER:
2311	result = 0;
2312	break;
2313	case GL_SELECT:
2314	if (se->hitFlag)
2315	{
2316	write_hit_record(se);
2317	}
2318
2319	if (se->bufferCount > se->bufferSize)
2320	{
2321	/* overflow */
2322	result = -1;
2323	}
2324	else
2325	{
2326	result = se->hits;
2327	}
2328	se->bufferCount = 0;
2329	se->hits = 0;
2330	se->nameStackDepth = 0;
2331	break;
2332	case GL_FEEDBACK:
2333	if (f->count > f->bufferSize)
2334	{
2335	/* overflow */
2336	result = -1;
2337	}
2338	else
2339	{
2340	result = f->count;
2341	}
2342	f->count = 0;
2343	break;
2344	default:
2345	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "invalid rendermode");
2346	return 0;
2347	}
2348
2349	switch (mode)
2350	{
2351	case GL_RENDER:
2352	break;
2353	case GL_SELECT:
2354	if (se->bufferSize == 0)
2355	{
2356	/* haven't called glSelectBuffer yet */
2357	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
2358	"buffersize = 0");
2359	}
2360	break;
2361	case GL_FEEDBACK:
2362	if (f->bufferSize == 0)
2363	{
2364	/* haven't called glFeedbackBuffer yet */
2365	crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION,
2366	"buffersize = 0");
2367	}
2368	break;
2369	default:
2370	crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "invalid rendermode");
2371	return 0;
2372	}
2373
2374	g->renderMode = mode;
2375
2376	return result;
2377	}
2378
2379
2380	void STATE_APIENTRY
2381	crStateSelectDrawPixels(GLsizei width, GLsizei height, GLenum format,
2382	GLenum type, const GLvoid * pixels)
2383	{
2384	(void) width;
2385	(void) height;
2386	(void) format;
2387	(void) type;
2388	(void) pixels;
2389	select_rasterpos();
2390	}
2391
2392	void STATE_APIENTRY
2393	crStateSelectCopyPixels(GLint x, GLint y, GLsizei width, GLsizei height,
2394	GLenum type)
2395	{
2396	(void) x;
2397	(void) y;
2398	(void) width;
2399	(void) height;
2400	(void) type;
2401	select_rasterpos();
2402	}
2403
2404	void STATE_APIENTRY
2405	crStateSelectBitmap(GLsizei width, GLsizei height, GLfloat xorig,
2406	GLfloat yorig, GLfloat xmove, GLfloat ymove,
2407	const GLubyte * bitmap)
2408	{
2409	CRContext *g = GetCurrentContext();
2410	(void) width;
2411	(void) height;
2412	(void) xorig;
2413	(void) yorig;
2414	(void) bitmap;
2415
2416	select_rasterpos();
2417	if (g->current.rasterValid)
2418	{
2419	g->current.rasterAttrib[VERT_ATTRIB_POS][0] += xmove;
2420	g->current.rasterAttrib[VERT_ATTRIB_POS][1] += ymove;
2421	}
2422	}
2423

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