ReactOS 0.4.15-dev-5672-gf73ac17
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*/
GLsizeiptr size
Definition: glext.h:5919
static PVOID ptr
Definition: dispmode.c:27