1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.4 |
static const char RCSid[] = "$Id: rcode_norm.c,v 2.3 2019/08/13 16:31:35 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
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/* |
5 |
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* Encode and decode surface normal map using 32-bit integers |
6 |
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*/ |
7 |
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8 |
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#include "copyright.h" |
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#include <stdlib.h> |
11 |
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#include "platform.h" |
12 |
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#include "rtio.h" |
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#include "rtmath.h" |
14 |
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#include "normcodec.h" |
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16 |
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char *progname; /* set in main() */ |
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18 |
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19 |
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/* Report usage error and exit */ |
20 |
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static void |
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usage_exit(int code) |
22 |
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{ |
23 |
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fputs("Usage: ", stderr); |
24 |
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fputs(progname, stderr); |
25 |
greg |
2.2 |
fputs(" [-h[io]][-H[io]][-f[afd]] [input [output.nrm]]\n", stderr); |
26 |
greg |
2.1 |
fputs(" Or: ", stderr); |
27 |
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fputs(progname, stderr); |
28 |
greg |
2.2 |
fputs(" -r [-i][-u][-h[io]][-H[io]][-f[afd]] [input.nrm [output]]\n", |
29 |
greg |
2.1 |
stderr); |
30 |
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exit(code); |
31 |
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} |
32 |
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33 |
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34 |
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/* Encode normals from input stream */ |
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static int |
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encode_normals(NORMCODEC *ncp) |
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{ |
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long nexpected = (long)ncp->res.xr * ncp->res.yr; |
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40 |
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if (ncp->inpfmt[0]) { |
41 |
greg |
2.3 |
if (strstr(ncp->inpfmt, "ascii") != NULL) |
42 |
greg |
2.1 |
ncp->format = 'a'; |
43 |
greg |
2.3 |
else if (strstr(ncp->inpfmt, "float") != NULL) |
44 |
greg |
2.1 |
ncp->format = 'f'; |
45 |
greg |
2.3 |
else if (strstr(ncp->inpfmt, "double") != NULL) |
46 |
greg |
2.1 |
ncp->format = 'd'; |
47 |
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else { |
48 |
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fputs(ncp->inpname, stderr); |
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fputs(": unsupported input format: ", stderr); |
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fputs(ncp->inpfmt, stderr); |
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fputc('\n', stderr); |
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return 0; |
53 |
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} |
54 |
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} |
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56 |
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do { |
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int ok = 0; |
58 |
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FVECT nrm; |
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60 |
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switch (ncp->format) { |
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case 'a': |
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ok = (fscanf(ncp->finp, FVFORMAT, |
63 |
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&nrm[0], &nrm[1], &nrm[2]) == 3); |
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break; |
65 |
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#ifdef SMLFLT |
66 |
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case 'f': |
67 |
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ok = (getbinary(nrm, sizeof(*nrm), 3, ncp->finp) == 3); |
68 |
greg |
2.4 |
if (ncp->swapped) |
69 |
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swap32((char *)nrm, 3); |
70 |
greg |
2.1 |
break; |
71 |
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case 'd': { |
72 |
greg |
2.4 |
double nrmd[3]; |
73 |
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ok = (getbinary(nrmd, sizeof(*nrmd), |
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3, ncp->finp) == 3); |
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if (ncp->swapped) |
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swap64((char *)nrmd, 3); |
77 |
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if (ok) VCOPY(nrm, nrmd); |
78 |
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} break; |
79 |
greg |
2.1 |
#else |
80 |
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case 'f': { |
81 |
greg |
2.4 |
float nrmf[3]; |
82 |
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ok = (getbinary(nrmf, sizeof(*nrmf), |
83 |
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3, ncp->finp) == 3); |
84 |
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if (ncp->swapped) |
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swap32((char *)nrmf, 3); |
86 |
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if (ok) VCOPY(nrm, nrmf); |
87 |
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} break; |
88 |
greg |
2.1 |
case 'd': |
89 |
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ok = (getbinary(nrm, sizeof(*nrm), 3, ncp->finp) == 3); |
90 |
greg |
2.4 |
if (ncp->swapped) |
91 |
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swap64((char *)nrm, 3); |
92 |
greg |
2.1 |
break; |
93 |
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#endif |
94 |
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} |
95 |
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if (!ok) |
96 |
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break; |
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98 |
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normalize(nrm); |
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putint(encodedir(nrm), 4, stdout); |
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101 |
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} while (--nexpected); |
102 |
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103 |
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if (nexpected > 0) { |
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fputs(ncp->inpname, stderr); |
105 |
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fputs(": fewer normals than expected\n", stderr); |
106 |
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return 0; |
107 |
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} |
108 |
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return 1; |
109 |
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} |
110 |
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111 |
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112 |
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/* Output the given normal to stdout */ |
113 |
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static void |
114 |
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output_normal(NORMCODEC *ncp, FVECT nrm) |
115 |
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{ |
116 |
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switch (ncp->format) { |
117 |
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case 'a': |
118 |
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printf("%.9f %.9f %.9f\n", nrm[0], nrm[1], nrm[2]); |
119 |
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break; |
120 |
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#ifdef SMLFLT |
121 |
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case 'f': |
122 |
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putbinary(nrm, sizeof(*nrm), 3, stdout); |
123 |
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break; |
124 |
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case 'd': { |
125 |
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double nrmd[3]; |
126 |
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VCOPY(nrmd, nrm); |
127 |
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putbinary(nrmd, sizeof(*nrmd), 3, stdout); |
128 |
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} |
129 |
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break; |
130 |
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#else |
131 |
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case 'f': { |
132 |
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float nrmf[3]; |
133 |
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VCOPY(nrmf, nrm); |
134 |
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putbinary(nrmf, sizeof(*nrmf), 3, stdout); |
135 |
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} |
136 |
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break; |
137 |
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case 'd': |
138 |
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putbinary(nrm, sizeof(*nrm), 3, stdout); |
139 |
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break; |
140 |
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#endif |
141 |
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} |
142 |
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} |
143 |
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144 |
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145 |
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/* Decode normals from input stream */ |
146 |
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static int |
147 |
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decode_normals(NORMCODEC *ncp) |
148 |
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{ |
149 |
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long nexpected = (long)ncp->res.xr * ncp->res.yr; |
150 |
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151 |
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if (!check_decode_normals(ncp)) |
152 |
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return 0; |
153 |
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154 |
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do { |
155 |
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FVECT nrm; |
156 |
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157 |
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if (decode_normal_next(nrm, ncp) < 0) |
158 |
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break; |
159 |
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160 |
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output_normal(ncp, nrm); |
161 |
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162 |
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} while (--nexpected); |
163 |
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164 |
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if (nexpected > 0) { |
165 |
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fputs(ncp->inpname, stderr); |
166 |
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fputs(": unexpected EOF\n", stderr); |
167 |
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return 0; |
168 |
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} |
169 |
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return 1; |
170 |
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} |
171 |
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172 |
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173 |
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/* Decode normals at particular pixels given on standard input */ |
174 |
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static int |
175 |
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pixel_normals(NORMCODEC *ncp, int unbuf) |
176 |
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{ |
177 |
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int x, y; |
178 |
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FVECT nrm; |
179 |
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180 |
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if (ncp->finp == stdin) { |
181 |
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fputs(progname, stderr); |
182 |
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fputs(": <stdin> used for encoded normals\n", stderr); |
183 |
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return 0; |
184 |
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} |
185 |
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if (!check_decode_normals(ncp)) |
186 |
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return 0; |
187 |
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if (ncp->res.rt != PIXSTANDARD) { |
188 |
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fputs(progname, stderr); |
189 |
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fputs(": can only handle standard pixel ordering\n", stderr); |
190 |
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return 0; |
191 |
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} |
192 |
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while (scanf("%d %d", &x, &y) == 2) { |
193 |
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194 |
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y = ncp->res.yr-1 - y; |
195 |
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196 |
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if (decode_normal_pix(nrm, ncp, x, y) < 0) |
197 |
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return 0; |
198 |
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199 |
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output_normal(ncp, nrm); |
200 |
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201 |
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if (unbuf && fflush(stdout) == EOF) { |
202 |
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fputs(progname, stderr); |
203 |
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fputs(": write error on output\n", stderr); |
204 |
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return 0; |
205 |
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} |
206 |
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} |
207 |
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if (!feof(stdin)) { |
208 |
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fputs(progname, stderr); |
209 |
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fputs(": non-integer as pixel index\n", stderr); |
210 |
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return 0; |
211 |
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} |
212 |
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return 1; |
213 |
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} |
214 |
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215 |
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216 |
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int |
217 |
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main(int argc, char *argv[]) |
218 |
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{ |
219 |
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int reverse = 0; |
220 |
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int bypixel = 0; |
221 |
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int unbuffered = 0; |
222 |
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NORMCODEC nc; |
223 |
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int a; |
224 |
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225 |
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progname = argv[0]; |
226 |
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set_nc_defaults(&nc); |
227 |
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nc.hdrflags = HF_ALL; |
228 |
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for (a = 1; a < argc && argv[a][0] == '-'; a++) |
229 |
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switch (argv[a][1]) { |
230 |
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case 'r': |
231 |
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reverse++; |
232 |
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break; |
233 |
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case 'f': |
234 |
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switch (argv[a][2]) { |
235 |
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case 'f': |
236 |
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case 'd': |
237 |
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case 'a': |
238 |
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nc.format = argv[a][2]; |
239 |
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break; |
240 |
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default: |
241 |
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fputs(progname, stderr); |
242 |
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fputs(": unsupported -f? format\n", stderr); |
243 |
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usage_exit(1); |
244 |
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} |
245 |
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break; |
246 |
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case 'h': |
247 |
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switch (argv[a][2]) { |
248 |
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case '\0': |
249 |
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nc.hdrflags &= ~(HF_HEADIN|HF_HEADOUT); |
250 |
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break; |
251 |
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case 'i': |
252 |
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case 'I': |
253 |
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nc.hdrflags &= ~HF_HEADIN; |
254 |
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break; |
255 |
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case 'o': |
256 |
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case 'O': |
257 |
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nc.hdrflags &= ~HF_HEADOUT; |
258 |
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break; |
259 |
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default: |
260 |
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usage_exit(1); |
261 |
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} |
262 |
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break; |
263 |
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case 'H': |
264 |
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switch (argv[a][2]) { |
265 |
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case '\0': |
266 |
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nc.hdrflags &= ~(HF_RESIN|HF_RESOUT); |
267 |
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break; |
268 |
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case 'i': |
269 |
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case 'I': |
270 |
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nc.hdrflags &= ~HF_RESIN; |
271 |
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break; |
272 |
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case 'o': |
273 |
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case 'O': |
274 |
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nc.hdrflags &= ~HF_RESOUT; |
275 |
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break; |
276 |
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default: |
277 |
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usage_exit(1); |
278 |
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} |
279 |
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break; |
280 |
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case 'i': |
281 |
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bypixel++; |
282 |
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break; |
283 |
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case 'u': |
284 |
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unbuffered++; |
285 |
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break; |
286 |
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default: |
287 |
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usage_exit(1); |
288 |
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} |
289 |
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nc.hdrflags |= !reverse * HF_ENCODE; |
290 |
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291 |
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if ((nc.hdrflags & (HF_RESIN|HF_RESOUT)) == HF_RESOUT) { |
292 |
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fputs(progname, stderr); |
293 |
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fputs(": unknown resolution for output\n", stderr); |
294 |
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return 1; |
295 |
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} |
296 |
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if (bypixel) { |
297 |
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if (!reverse) { |
298 |
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fputs(progname, stderr); |
299 |
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fputs(": -i only supported with -r option\n", |
300 |
|
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stderr); |
301 |
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usage_exit(1); |
302 |
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} |
303 |
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if (a >= argc) { |
304 |
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fputs(progname, stderr); |
305 |
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fputs(": -i option requires input file\n", stderr); |
306 |
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usage_exit(1); |
307 |
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} |
308 |
|
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if (!(nc.hdrflags & HF_RESIN)) { |
309 |
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fputs(progname, stderr); |
310 |
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fputs(": -i option requires input resolution\n", stderr); |
311 |
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usage_exit(1); |
312 |
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} |
313 |
greg |
2.2 |
nc.hdrflags &= ~HF_RESOUT; |
314 |
greg |
2.1 |
} |
315 |
|
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if (a < argc-2) { |
316 |
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fputs(progname, stderr); |
317 |
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fputs(": too many file arguments\n", stderr); |
318 |
|
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usage_exit(1); |
319 |
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} |
320 |
|
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if (a < argc && !(nc.finp = fopen(nc.inpname=argv[a], "r"))) { |
321 |
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fputs(nc.inpname, stderr); |
322 |
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fputs(": cannot open for reading\n", stderr); |
323 |
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return 1; |
324 |
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} |
325 |
|
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if (a+1 < argc && !freopen(argv[a+1], "w", stdout)) { |
326 |
|
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fputs(argv[a+1], stderr); |
327 |
|
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fputs(": cannot open for writing\n", stderr); |
328 |
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return 1; |
329 |
|
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} |
330 |
|
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SET_FILE_BINARY(nc.finp); |
331 |
|
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if (reverse || nc.format != 'a') |
332 |
|
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SET_FILE_BINARY(stdout); |
333 |
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#ifdef getc_unlocked /* avoid stupid semaphores */ |
334 |
|
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flockfile(nc.finp); |
335 |
|
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flockfile(stdout); |
336 |
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#endif |
337 |
|
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/* read/copy header */ |
338 |
|
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if (!process_nc_header(&nc, a, argv)) |
339 |
|
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return 1; |
340 |
|
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/* process data */ |
341 |
|
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if (!reverse) { |
342 |
|
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if (!encode_normals(&nc)) |
343 |
|
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return 1; |
344 |
|
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} else if (bypixel) { |
345 |
|
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if (!pixel_normals(&nc, unbuffered)) |
346 |
|
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return 1; |
347 |
|
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} else if (!decode_normals(&nc)) |
348 |
|
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return 1; |
349 |
|
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|
350 |
|
|
if (fflush(stdout) == EOF) { |
351 |
|
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fputs(progname, stderr); |
352 |
|
|
fputs(": error writing output\n", stderr); |
353 |
|
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return 1; |
354 |
|
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} |
355 |
|
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return 0; |
356 |
|
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} |