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root/radiance/ray/src/hd/rhd_odraw.h
Revision: 3.3
Committed: Mon Dec 21 13:17:01 1998 UTC (25 years, 3 months ago) by gwlarson
Content type: text/plain
Branch: MAIN
Changes since 3.2: +1 -0 lines
Log Message:
added presence map for quick check of duplicate pixels

File Contents

# Content
1 /* Copyright (c) 1998 Silicon Graphics, Inc. */
2
3 /* SCCSid "$SunId$ SGI" */
4
5 /*
6 * Header for OpenGL cone drawing routines with depth buffer checks.
7 */
8
9 #undef NOPROTO
10 #define NOPROTO 1
11 #include "color.h"
12 #include "tonemap.h"
13 #include "rhdriver.h"
14
15 #ifndef int4
16 #define int4 int
17 #endif
18
19 extern struct ODview {
20 short hhi, vhi; /* screen image resolution */
21 short hlow, vlow; /* block resolution */
22 struct ODblock {
23 short nsamp; /* number of samples in block */
24 short nused; /* number actually allocated */
25 int first; /* first sample in this block */
26 int free; /* index for block free list */
27 float pthresh; /* proximity threshold */
28 } *bmap; /* low resolution image map */
29 int4 *emap; /* low resolution edge presence map */
30 int4 *pmap; /* high resolution presence map */
31 GLfloat *dmap; /* high resolution depth map */
32 } *odView; /* our view list */
33
34 extern int odNViews; /* number of views in our list */
35
36 extern struct ODsamp {
37 union ODfunion {
38 float prox; /* viewpoint proximity */
39 int4 next; /* next in free list */
40
41 } *f; /* free list next or proximity */
42 short (*ip)[2]; /* image position array */
43 TMbright *brt; /* encoded brightness array */
44 BYTE (*chr)[3]; /* encoded chrominance array */
45 BYTE (*rgb)[3]; /* tone-mapped color array */
46 int4 *redraw; /* redraw flags */
47 int nsamp; /* total number of samples */
48 char *base; /* base of allocated memory */
49 } odS; /* sample values */
50
51 #ifndef FL4OP
52 #define FL4OP(f,i,op) ((f)[(i)>>5] op (1L<<((i)&0x1f)))
53 #define CHK4(f,i) FL4OP(f,i,&)
54 #define SET4(f,i) FL4OP(f,i,|=)
55 #define CLR4(f,i) FL4OP(f,i,&=~)
56 #define TGL4(f,i) FL4OP(f,i,^=)
57 #define FL4NELS(n) (((n)+0x1f)>>5)
58 #define CLR4ALL(f,n) bzero((char *)(f),FL4NELS(n)*sizeof(int4))
59 #endif
60
61 #define OMAXDEPTH 32000 /* maximum depth value */
62
63 #define nextfree(i) f[i].next /* free pointers */
64 #define closeness(i) f[i].prox /* viewpoint proximity */
65 #define ENDFREE (-1) /* free list terminator */
66
67 #define odClean() odInit(odS.nsamp) /* clear samples */
68 #define odDone() odInit(0) /* free samples */
69
70
71 /*****************************************************************************
72 * Interface routines:
73
74
75 int
76 odInit(nsamps) : allocate and initialize memory
77 int nsamps; : number of samples to make available
78
79 If nsamps is zero, then this becomes a deallocation routine. If nsamps
80 is the same as last time, then this merely clears all data. The dev_auxview()
81 function may be called to determine the current view(s). The odAlloc()
82 function returns the number of samples actually allocated.
83
84
85 void
86 odSample(c, d, p) : register new sample value
87 COLR c; : pixel color (RGBE)
88 FVECT d; : ray direction vector
89 FVECT p; : world intersection point
90
91 If p is NULL, then the point is at infinity.
92
93
94 void
95 odDepthMap(vn, dm) : set depth map for the given view
96 int vn; : view number
97 GLfloat *dm; : depth map
98
99 Assign the depth map associated with view number vn. The map has
100 been preallocated, and won't be freed until it is no longer needed
101 (after an odAlloc() call). All depth values are the projected
102 distance along the view direction from the view origin. If dm
103 is NULL, then there is no depth map associated with this view.
104
105
106 void
107 odRedraw(vn, x0, y0, x1, y1) : region needs to be redrawn
108 int vn; : view number
109 int x0, y0, x1, y1; : rectangle to redraw
110
111 This call indicates that the given rectangular region in view vn
112 needs to be redrawn in the next call to odUpdate().
113
114
115 void
116 odUpdate(vn) : update the current view
117 int vn; : view number
118
119 Draw all new and undrawn sample values since last call for this view.
120
121
122 void
123 odRemap(newhist) : recompute tone mapping
124 int newhist; : flag whether to clear history
125
126 Recompute the tone mapping for all the samples in all the views
127 and redraw them on the next call(s) to odUpdate(). If newhist
128 is non-zero, then clear the previous sample history.
129
130 **********************************************************************/