ReactOS  0.4.13-dev-464-g6b95727
macros.h
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1 /* $Id: macros.h,v 1.12 1998/01/06 01:42:29 brianp Exp $ */
2 
3 /*
4  * Mesa 3-D graphics library
5  * Version: 2.6
6  * Copyright (C) 1995-1997 Brian Paul
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Library General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Library General Public License for more details.
17  *
18  * You should have received a copy of the GNU Library General Public
19  * License along with this library; if not, write to the Free
20  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  */
22 
23 
24 /*
25  * $Log: macros.h,v $
26  * Revision 1.12 1998/01/06 01:42:29 brianp
27  * small patch for BeOS
28  *
29  * Revision 1.11 1997/06/23 00:23:23 brianp
30  * changed preprocessor test for Macintosh
31  *
32  * Revision 1.10 1997/06/06 03:47:31 brianp
33  * added COPY_4UBV()
34  *
35  * Revision 1.9 1997/05/01 01:39:15 brianp
36  * moved NORMALIZE_3V macro to mmath.h and renamed NORMALIZE_3FV
37  *
38  * Revision 1.8 1997/04/24 00:28:45 brianp
39  * added COPY_2V macro
40  *
41  * Revision 1.7 1997/04/07 02:59:46 brianp
42  * added ASSIGN_2V macro
43  *
44  * Revision 1.6 1997/04/01 04:08:16 brianp
45  * changed DEFARRAY, UNDEFARRAY for Mac, per Miklos Fazekas
46  * added DEG2RAD macro
47  *
48  * Revision 1.5 1997/03/21 02:01:17 brianp
49  * added ASSERT() macro
50  *
51  * Revision 1.4 1997/02/03 20:31:26 brianp
52  * added DEFARRAY and UNDEFARRAY macros for BeOS
53  *
54  * Revision 1.3 1996/10/31 01:12:00 brianp
55  * removed (GLint) from FLOAT_TO_UINT() macro
56  *
57  * Revision 1.2 1996/09/15 01:49:44 brianp
58  * added #define NULL 0
59  *
60  * Revision 1.1 1996/09/13 01:38:16 brianp
61  * Initial revision
62  *
63  */
64 
65 
66 /*
67  * A collection of useful macros.
68  */
69 
70 
71 #ifndef MACROS_H
72 #define MACROS_H
73 
74 
75 #include <math.h>
76 #include <string.h>
77 
78 
79 #ifdef DEBUG
80 # include <assert.h>
81 # define ASSERT(X) assert(X)
82 #else
83 # define ASSERT(X)
84 #endif
85 
86 
87 /* Limits: */
88 #define MAX_GLUSHORT 0xffff
89 #define MAX_GLUINT 0xffffffff
90 
91 
92 
93 /* Copy short vectors: */
94 
95 #define COPY_2V( DST, SRC ) DST[0] = SRC[0]; \
96  DST[1] = SRC[1];
97 
98 #define COPY_3V( DST, SRC ) DST[0] = SRC[0]; \
99  DST[1] = SRC[1]; \
100  DST[2] = SRC[2];
101 
102 #define COPY_4V( DST, SRC ) DST[0] = SRC[0]; \
103  DST[1] = SRC[1]; \
104  DST[2] = SRC[2]; \
105  DST[3] = SRC[3];
106 
107 /*
108  * Copy a vector of 4 GLubytes from SRC to DST.
109  */
110 #define COPY_4UBV(DST, SRC) \
111  if (sizeof(GLuint)==4*sizeof(GLubyte)) { \
112  *((GLuint*)(DST)) = *((GLuint*)(SRC)); \
113  } \
114  else { \
115  (DST)[0] = (SRC)[0]; \
116  (DST)[1] = (SRC)[1]; \
117  (DST)[2] = (SRC)[2]; \
118  (DST)[3] = (SRC)[3]; \
119  }
120 
121 
122 
123 /* Assign scalers to short vectors: */
124 #define ASSIGN_2V( V, V0, V1 ) V[0] = V0; V[1] = V1;
125 
126 #define ASSIGN_3V( V, V0, V1, V2 ) V[0] = V0; V[1] = V1; V[2] = V2;
127 
128 #define ASSIGN_4V( V, V0, V1, V2, V3 ) V[0] = V0; \
129  V[1] = V1; \
130  V[2] = V2; \
131  V[3] = V3;
132 
133 
134 /* Test if we're inside a glBegin / glEnd pair: */
135 #define INSIDE_BEGIN_END(CTX) ((CTX)->Primitive!=GL_BITMAP)
136 
137 
138 
139 /* Absolute value (for Int, Float, Double): */
140 #define ABSI(X) ((X) < 0 ? -(X) : (X))
141 #define ABSF(X) ((X) < 0.0F ? -(X) : (X))
142 #define ABSD(X) ((X) < 0.0 ? -(X) : (X))
143 
144 
145 
146 /* Round a floating-point value to the nearest integer: */
147 #define ROUNDF(X) ( (X)<0.0F ? ((GLint) ((X)-0.5F)) : ((GLint) ((X)+0.5F)) )
148 
149 
150 /* Compute ceiling of integer quotient of A divided by B: */
151 #define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
152 
153 
154 /* Clamp X to [MIN,MAX]: */
155 #define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
156 
157 
158 /* Min of two values: */
159 #define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
160 
161 
162 /* MAX of two values: */
163 #define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
164 
165 
166 /* Dot product of two 3-element vectors */
167 #define DOT3( a, b ) ( a[0]*b[0] + a[1]*b[1] + a[2]*b[2] )
168 
169 
170 /* Dot product of two 4-element vectors */
171 #define DOT4( a, b ) ( a[0]*b[0] + a[1]*b[1] + a[2]*b[2] + a[3]*b[3] )
172 
173 
174 
175 /*
176  * Integer / float conversion for colors, normals, etc.
177  */
178 
179 /* Convert GLubyte in [0,255] to GLfloat in [0.0,1.0] */
180 #define UBYTE_TO_FLOAT(B) ((GLfloat) (B) * (1.0F / 255.0F))
181 
182 /* Convert GLfloat in [0.0,1.0] to GLubyte in [0,255] */
183 #define FLOAT_TO_UBYTE(X) ((GLubyte) (GLint) (((X)) * 255.0F))
184 
185 
186 /* Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0] */
187 #define BYTE_TO_FLOAT(B) ((2.0F * (B) + 1.0F) * (1.0F/255.0F))
188 
189 /* Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127] */
190 #define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 )
191 
192 
193 /* Convert GLushort in [0,65536] to GLfloat in [0.0,1.0] */
194 #define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F))
195 
196 /* Convert GLfloat in [0.0,1.0] to GLushort in [0,65536] */
197 #define FLOAT_TO_USHORT(X) ((GLushort) (GLint) ((X) * 65535.0F))
198 
199 
200 /* Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0] */
201 #define SHORT_TO_FLOAT(S) ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))
202 
203 /* Convert GLfloat in [0.0,1.0] to GLshort in [-32768,32767] */
204 #define FLOAT_TO_SHORT(X) ( (((GLint) (65535.0F * (X))) - 1) / 2 )
205 
206 
207 /* Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0] */
208 #define UINT_TO_FLOAT(U) ((GLfloat) (U) * (1.0F / 4294967295.0F))
209 
210 /* Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295] */
211 #define FLOAT_TO_UINT(X) ((GLuint) ((X) * 4294967295.0))
212 
213 
214 /* Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0] */
215 #define INT_TO_FLOAT(I) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0F))
216 
217 /* Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647] */
218 /* causes overflow:
219 #define FLOAT_TO_INT(X) ( (((GLint) (4294967294.0F * (X))) - 1) / 2 )
220 */
221 /* a close approximation: */
222 #define FLOAT_TO_INT(X) ( (GLint) (2147483647.0 * (X)) )
223 
224 
225 
226 /* Memory copy: */
227 #ifdef SUNOS4
228 #define MEMCPY( DST, SRC, BYTES) \
229  memcpy( (char *) (DST), (char *) (SRC), (int) (BYTES) )
230 #else
231 #define MEMCPY( DST, SRC, BYTES) \
232  memcpy( (void *) (DST), (void *) (SRC), (size_t) (BYTES) )
233 #endif
234 
235 
236 /* Memory set: */
237 #ifdef SUNOS4
238 #define MEMSET( DST, VAL, N ) \
239  memset( (char *) (DST), (int) (VAL), (int) (N) )
240 #else
241 #define MEMSET( DST, VAL, N ) \
242  memset( (void *) (DST), (int) (VAL), (size_t) (N) )
243 #endif
244 
245 
246 /* MACs and BeOS don't support static larger than 32kb, so... */
247 #if defined(macintosh) && !defined(__MRC__)
248  extern char *AGLAlloc(int size);
249  extern void AGLFree(char* ptr);
250 # define DEFARRAY(TYPE,NAME,SIZE) TYPE *NAME = (TYPE*)AGLAlloc(sizeof(TYPE)*(SIZE))
251 # define UNDEFARRAY(NAME) AGLFree((char*)NAME)
252 #elif defined(__BEOS__)
253 # define DEFARRAY(TYPE,NAME,SIZE) TYPE *NAME = (TYPE*)malloc(sizeof(TYPE)*(SIZE))
254 # define UNDEFARRAY(NAME) free(NAME)
255 #else
256 # define DEFARRAY(TYPE,NAME,SIZE) TYPE NAME[SIZE]
257 # define UNDEFARRAY(NAME)
258 #endif
259 
260 
261 /* Pi */
262 #ifndef M_PI
263 #define M_PI (3.1415926)
264 #endif
265 
266 
267 /* Degrees to radians conversion: */
268 #define DEG2RAD (M_PI/180.0)
269 
270 
271 #ifndef NULL
272 #define NULL 0
273 #endif
274 
275 
276 
277 #endif /*MACROS_H*/
static PVOID ptr
Definition: dispmode.c:27
GLsizeiptr size
Definition: glext.h:5919