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- /* $Id: macros.h,v 1.30 2002/10/18 17:02:00 kschultz Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 4.0.3
- *
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
- /*
- * A collection of useful macros.
- */
-
-
- #ifndef MACROS_H
- #define MACROS_H
-
-
- #include "glheader.h"
- /* Do not reference mtypes.h from this file.
- */
-
-
- /* Limits: */
- #define MAX_GLUSHORT 0xffff
- #define MAX_GLUINT 0xffffffff
-
-
- /* Pi */
- #ifndef M_PI
- #define M_PI (3.1415926)
- #endif
-
-
- /* Degrees to radians conversion: */
- #define DEG2RAD (M_PI/180.0)
-
-
- #ifndef NULL
- #define NULL 0
- #endif
-
-
- /* Stepping a GLfloat pointer by a byte stride
- */
- #define STRIDE_F(p, i) (p = (GLfloat *)((GLubyte *)p + i))
- #define STRIDE_UI(p, i) (p = (GLuint *)((GLubyte *)p + i))
- #define STRIDE_4UB(p, i) (p = (GLubyte (*)[4])((GLubyte *)p + i))
- #define STRIDE_4CHAN(p, i) (p = (GLchan (*)[4])((GLubyte *)p + i))
- #define STRIDE_CHAN(p, i) (p = (GLchan *)((GLubyte *)p + i))
- #define STRIDE_T(p, t, i) (p = (t)((GLubyte *)p + i))
-
-
- #define ZERO_2V( DST ) (DST)[0] = (DST)[1] = 0
- #define ZERO_3V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = 0
- #define ZERO_4V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = (DST)[3] = 0
-
-
- #define TEST_EQ_4V(a,b) ((a)[0] == (b)[0] && \
- (a)[1] == (b)[1] && \
- (a)[2] == (b)[2] && \
- (a)[3] == (b)[3])
-
- #define TEST_EQ_3V(a,b) ((a)[0] == (b)[0] && \
- (a)[1] == (b)[1] && \
- (a)[2] == (b)[2])
-
- #if defined(__i386__)
- #define TEST_EQ_4UBV(DST, SRC) *((GLuint*)(DST)) == *((GLuint*)(SRC))
- #else
- #define TEST_EQ_4UBV(DST, SRC) TEST_EQ_4V(DST, SRC)
- #endif
-
-
-
- /* Copy short vectors: */
- #define COPY_2V( DST, SRC ) \
- { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- }
-
- #define COPY_3V( DST, SRC ) \
- { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
- }
-
- #define COPY_4V( DST, SRC ) \
- { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
- (DST)[3] = (SRC)[3]; \
- }
-
- #define COPY_2V_CAST( DST, SRC, CAST ) \
- { \
- (DST)[0] = (CAST)(SRC)[0]; \
- (DST)[1] = (CAST)(SRC)[1]; \
- }
-
- #define COPY_3V_CAST( DST, SRC, CAST ) \
- { \
- (DST)[0] = (CAST)(SRC)[0]; \
- (DST)[1] = (CAST)(SRC)[1]; \
- (DST)[2] = (CAST)(SRC)[2]; \
- }
-
- #define COPY_4V_CAST( DST, SRC, CAST ) \
- { \
- (DST)[0] = (CAST)(SRC)[0]; \
- (DST)[1] = (CAST)(SRC)[1]; \
- (DST)[2] = (CAST)(SRC)[2]; \
- (DST)[3] = (CAST)(SRC)[3]; \
- }
-
- #if defined(__i386__)
- #define COPY_4UBV(DST, SRC) \
- { \
- *((GLuint*)(DST)) = *((GLuint*)(SRC)); \
- }
- #else
- /* The GLuint cast might fail if DST or SRC are not dword-aligned (RISC) */
- #define COPY_4UBV(DST, SRC) \
- { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
- (DST)[3] = (SRC)[3]; \
- }
- #endif
-
- #define COPY_2FV( DST, SRC ) \
- { \
- const GLfloat *_tmp = (SRC); \
- (DST)[0] = _tmp[0]; \
- (DST)[1] = _tmp[1]; \
- }
-
- #define COPY_3FV( DST, SRC ) \
- { \
- const GLfloat *_tmp = (SRC); \
- (DST)[0] = _tmp[0]; \
- (DST)[1] = _tmp[1]; \
- (DST)[2] = _tmp[2]; \
- }
-
- #define COPY_4FV( DST, SRC ) \
- { \
- const GLfloat *_tmp = (SRC); \
- (DST)[0] = _tmp[0]; \
- (DST)[1] = _tmp[1]; \
- (DST)[2] = _tmp[2]; \
- (DST)[3] = _tmp[3]; \
- }
-
-
-
- #define COPY_SZ_4V(DST, SZ, SRC) \
- { \
- switch (SZ) { \
- case 4: (DST)[3] = (SRC)[3]; \
- case 3: (DST)[2] = (SRC)[2]; \
- case 2: (DST)[1] = (SRC)[1]; \
- case 1: (DST)[0] = (SRC)[0]; \
- } \
- }
-
- #define COPY_CLEAN_4V(DST, SZ, SRC) \
- { \
- ASSIGN_4V( DST, 0, 0, 0, 1 ); \
- COPY_SZ_4V( DST, SZ, SRC ); \
- }
-
- #define SUB_4V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] - (SRCB)[2]; \
- (DST)[3] = (SRCA)[3] - (SRCB)[3]; \
- }
-
- #define ADD_4V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
- (DST)[3] = (SRCA)[3] + (SRCB)[3]; \
- }
-
- #define SCALE_4V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] * (SRCB)[2]; \
- (DST)[3] = (SRCA)[3] * (SRCB)[3]; \
- }
-
- #define ACC_4V( DST, SRC ) \
- { \
- (DST)[0] += (SRC)[0]; \
- (DST)[1] += (SRC)[1]; \
- (DST)[2] += (SRC)[2]; \
- (DST)[3] += (SRC)[3]; \
- }
-
- #define ACC_SCALE_4V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] += (SRCA)[2] * (SRCB)[2]; \
- (DST)[3] += (SRCA)[3] * (SRCB)[3]; \
- }
-
- #define ACC_SCALE_SCALAR_4V( DST, S, SRCB ) \
- { \
- (DST)[0] += S * (SRCB)[0]; \
- (DST)[1] += S * (SRCB)[1]; \
- (DST)[2] += S * (SRCB)[2]; \
- (DST)[3] += S * (SRCB)[3]; \
- }
-
- #define SCALE_SCALAR_4V( DST, S, SRCB ) \
- { \
- (DST)[0] = S * (SRCB)[0]; \
- (DST)[1] = S * (SRCB)[1]; \
- (DST)[2] = S * (SRCB)[2]; \
- (DST)[3] = S * (SRCB)[3]; \
- }
-
-
- #define SELF_SCALE_SCALAR_4V( DST, S ) \
- { \
- (DST)[0] *= S; \
- (DST)[1] *= S; \
- (DST)[2] *= S; \
- (DST)[3] *= S; \
- }
-
-
- /*
- * Similarly for 3-vectors.
- */
- #define SUB_3V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] - (SRCB)[2]; \
- }
-
- #define ADD_3V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
- }
-
- #define SCALE_3V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] = (SRCA)[2] * (SRCB)[2]; \
- }
-
- #define SELF_SCALE_3V( DST, SRC ) \
- { \
- (DST)[0] *= (SRC)[0]; \
- (DST)[1] *= (SRC)[1]; \
- (DST)[2] *= (SRC)[2]; \
- }
-
- #define ACC_3V( DST, SRC ) \
- { \
- (DST)[0] += (SRC)[0]; \
- (DST)[1] += (SRC)[1]; \
- (DST)[2] += (SRC)[2]; \
- }
-
- #define ACC_SCALE_3V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
- (DST)[2] += (SRCA)[2] * (SRCB)[2]; \
- }
-
- #define SCALE_SCALAR_3V( DST, S, SRCB ) \
- { \
- (DST)[0] = S * (SRCB)[0]; \
- (DST)[1] = S * (SRCB)[1]; \
- (DST)[2] = S * (SRCB)[2]; \
- }
-
- #define ACC_SCALE_SCALAR_3V( DST, S, SRCB ) \
- { \
- (DST)[0] += S * (SRCB)[0]; \
- (DST)[1] += S * (SRCB)[1]; \
- (DST)[2] += S * (SRCB)[2]; \
- }
-
- #define SELF_SCALE_SCALAR_3V( DST, S ) \
- { \
- (DST)[0] *= S; \
- (DST)[1] *= S; \
- (DST)[2] *= S; \
- }
-
- #define ACC_SCALAR_3V( DST, S ) \
- { \
- (DST)[0] += S; \
- (DST)[1] += S; \
- (DST)[2] += S; \
- }
-
- /* And also for 2-vectors
- */
- #define SUB_2V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
- }
-
- #define ADD_2V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
- }
-
- #define SCALE_2V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
- }
-
- #define ACC_2V( DST, SRC ) \
- { \
- (DST)[0] += (SRC)[0]; \
- (DST)[1] += (SRC)[1]; \
- }
-
- #define ACC_SCALE_2V( DST, SRCA, SRCB ) \
- { \
- (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
- (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
- }
-
- #define SCALE_SCALAR_2V( DST, S, SRCB ) \
- { \
- (DST)[0] = S * (SRCB)[0]; \
- (DST)[1] = S * (SRCB)[1]; \
- }
-
- #define ACC_SCALE_SCALAR_2V( DST, S, SRCB ) \
- { \
- (DST)[0] += S * (SRCB)[0]; \
- (DST)[1] += S * (SRCB)[1]; \
- }
-
- #define SELF_SCALE_SCALAR_2V( DST, S ) \
- { \
- (DST)[0] *= S; \
- (DST)[1] *= S; \
- }
-
- #define ACC_SCALAR_2V( DST, S ) \
- { \
- (DST)[0] += S; \
- (DST)[1] += S; \
- }
-
-
-
- /* Assign scalers to short vectors: */
- #define ASSIGN_2V( V, V0, V1 ) \
- { \
- V[0] = V0; \
- V[1] = V1; \
- }
-
- #define ASSIGN_3V( V, V0, V1, V2 ) \
- { \
- V[0] = V0; \
- V[1] = V1; \
- V[2] = V2; \
- }
-
- #define ASSIGN_4V( V, V0, V1, V2, V3 ) \
- { \
- V[0] = V0; \
- V[1] = V1; \
- V[2] = V2; \
- V[3] = V3; \
- }
-
-
-
- /* Absolute value (for Int, Float, Double): */
- #define ABSI(X) ((X) < 0 ? -(X) : (X))
- #define ABSF(X) ((X) < 0.0F ? -(X) : (X))
- #define ABSD(X) ((X) < 0.0 ? -(X) : (X))
-
-
-
- /* Round a floating-point value to the nearest integer: */
- #define ROUNDF(X) ( (X)<0.0F ? ((GLint) ((X)-0.5F)) : ((GLint) ((X)+0.5F)) )
-
-
- /* Compute ceiling of integer quotient of A divided by B: */
- #define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
-
-
- /* Clamp X to [MIN,MAX]: */
- #define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
-
- /* Assign X to CLAMP(X, MIN, MAX) */
- #define CLAMP_SELF(x, mn, mx) \
- ( (x)<(mn) ? ((x) = (mn)) : ((x)>(mx) ? ((x)=(mx)) : (x)) )
-
-
-
- /* Min of two values: */
- #define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
-
- /* MAX of two values: */
- #define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
-
- /* Dot product of two 2-element vectors */
- #define DOT2( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] )
-
- /* Dot product of two 3-element vectors */
- #define DOT3( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2]*(b)[2] )
-
- /* Dot product of two 4-element vectors */
- #define DOT4( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + \
- (a)[2]*(b)[2] + (a)[3]*(b)[3] )
-
- #define DOT4V(v,a,b,c,d) (v[0]*(a) + v[1]*(b) + v[2]*(c) + v[3]*(d))
-
-
- #define CROSS3(n, u, v) \
- { \
- (n)[0] = (u)[1]*(v)[2] - (u)[2]*(v)[1]; \
- (n)[1] = (u)[2]*(v)[0] - (u)[0]*(v)[2]; \
- (n)[2] = (u)[0]*(v)[1] - (u)[1]*(v)[0]; \
- }
-
-
-
- /* Generic color packing macros
- * XXX We may move these into texutil.h at some point.
- */
-
- #define PACK_COLOR_8888( a, b, c, d ) \
- (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
-
- #define PACK_COLOR_888( a, b, c ) \
- (((a) << 16) | ((b) << 8) | (c))
-
- #define PACK_COLOR_565( a, b, c ) \
- ((((a) & 0xf8) << 8) | (((b) & 0xfc) << 3) | (((c) & 0xf8) >> 3))
-
- #define PACK_COLOR_1555( a, b, c, d ) \
- ((((b) & 0xf8) << 7) | (((c) & 0xf8) << 2) | (((d) & 0xf8) >> 3) | \
- ((a) ? 0x8000 : 0))
-
- #define PACK_COLOR_4444( a, b, c, d ) \
- ((((a) & 0xf0) << 8) | (((b) & 0xf0) << 4) | ((c) & 0xf0) | ((d) >> 4))
-
- #define PACK_COLOR_88( a, b ) \
- (((a) << 8) | (b))
-
- #define PACK_COLOR_332( a, b, c ) \
- (((a) & 0xe0) | (((b) & 0xe0) >> 3) | (((c) & 0xc0) >> 6))
-
-
- #ifdef MESA_BIG_ENDIAN
-
- #define PACK_COLOR_8888_LE( a, b, c, d ) PACK_COLOR_8888( d, c, b, a )
-
- #define PACK_COLOR_565_LE( a, b, c ) \
- (((a) & 0xf8) | (((b) & 0xe0) >> 5) | (((b) & 0x1c) << 11) | \
- (((c) & 0xf8) << 5))
-
- #define PACK_COLOR_1555_LE( a, b, c, d ) \
- ((((b) & 0xf8) >> 1) | (((c) & 0xc0) >> 6) | (((c) & 0x38) << 10) | \
- (((d) & 0xf8) << 5) | ((a) ? 0x80 : 0))
-
- #define PACK_COLOR_4444_LE( a, b, c, d ) PACK_COLOR_4444( c, d, a, b )
-
- #define PACK_COLOR_88_LE( a, b ) PACK_COLOR_88( b, a )
-
- #else /* little endian */
-
- #define PACK_COLOR_8888_LE( a, b, c, d ) PACK_COLOR_8888( a, b, c, d )
-
- #define PACK_COLOR_565_LE( a, b, c ) PACK_COLOR_565( a, b, c )
-
- #define PACK_COLOR_1555_LE( a, b, c, d ) PACK_COLOR_1555( a, b, c, d )
-
- #define PACK_COLOR_4444_LE( a, b, c, d ) PACK_COLOR_4444( a, b, c, d )
-
- #define PACK_COLOR_88_LE( a, b ) PACK_COLOR_88( a, b )
-
- #endif /* endianness */
-
-
- #endif
-