| /** |
| * \file macros.h |
| * A collection of useful macros. |
| */ |
| |
| /* |
| * Mesa 3-D graphics library |
| * Version: 6.5.2 |
| * |
| * Copyright (C) 1999-2006 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. |
| */ |
| |
| |
| #ifndef MACROS_H |
| #define MACROS_H |
| |
| #include "imports.h" |
| |
| |
| /** |
| * \name Integer / float conversion for colors, normals, etc. |
| */ |
| /*@{*/ |
| |
| /** Convert GLubyte in [0,255] to GLfloat in [0.0,1.0] */ |
| extern GLfloat _mesa_ubyte_to_float_color_tab[256]; |
| #define UBYTE_TO_FLOAT(u) _mesa_ubyte_to_float_color_tab[(unsigned int)(u)] |
| |
| /** Convert GLfloat in [0.0,1.0] to GLubyte in [0,255] */ |
| #define FLOAT_TO_UBYTE(X) ((GLubyte) (GLint) ((X) * 255.0F)) |
| |
| |
| /** Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0] */ |
| #define BYTE_TO_FLOAT(B) ((2.0F * (B) + 1.0F) * (1.0F/255.0F)) |
| |
| /** Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127] */ |
| #define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 ) |
| |
| |
| /** Convert GLushort in [0,65536] to GLfloat in [0.0,1.0] */ |
| #define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F)) |
| |
| /** Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0] */ |
| #define SHORT_TO_FLOAT(S) ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)) |
| |
| /** Convert GLfloat in [0.0,1.0] to GLshort in [-32768,32767] */ |
| #define FLOAT_TO_SHORT(X) ( (((GLint) (65535.0F * (X))) - 1) / 2 ) |
| |
| |
| /** Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0] */ |
| #define UINT_TO_FLOAT(U) ((GLfloat) (U) * (1.0F / 4294967295.0F)) |
| |
| /** Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295] */ |
| #define FLOAT_TO_UINT(X) ((GLuint) ((X) * 4294967295.0)) |
| |
| |
| /** Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0] */ |
| #define INT_TO_FLOAT(I) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0F)) |
| |
| /** Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647] */ |
| /* causes overflow: |
| #define FLOAT_TO_INT(X) ( (((GLint) (4294967294.0F * (X))) - 1) / 2 ) |
| */ |
| /* a close approximation: */ |
| #define FLOAT_TO_INT(X) ( (GLint) (2147483647.0 * (X)) ) |
| |
| |
| #define BYTE_TO_UBYTE(b) ((GLubyte) ((b) < 0 ? 0 : (GLubyte) (b))) |
| #define SHORT_TO_UBYTE(s) ((GLubyte) ((s) < 0 ? 0 : (GLubyte) ((s) >> 7))) |
| #define USHORT_TO_UBYTE(s) ((GLubyte) ((s) >> 8)) |
| #define INT_TO_UBYTE(i) ((GLubyte) ((i) < 0 ? 0 : (GLubyte) ((i) >> 23))) |
| #define UINT_TO_UBYTE(i) ((GLubyte) ((i) >> 24)) |
| |
| |
| #define BYTE_TO_USHORT(b) ((b) < 0 ? 0 : ((GLushort) (((b) * 65535) / 255))) |
| #define UBYTE_TO_USHORT(b) (((GLushort) (b) << 8) | (GLushort) (b)) |
| #define SHORT_TO_USHORT(s) ((s) < 0 ? 0 : ((GLushort) (((s) * 65535 / 32767)))) |
| #define INT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 15))) |
| #define UINT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 16))) |
| #define UNCLAMPED_FLOAT_TO_USHORT(us, f) \ |
| us = ( (GLushort) IROUND( CLAMP((f), 0.0, 1.0) * 65535.0F) ) |
| #define CLAMPED_FLOAT_TO_USHORT(us, f) \ |
| us = ( (GLushort) IROUND( (f) * 65535.0F) ) |
| |
| /*@}*/ |
| |
| |
| /** Stepping a GLfloat pointer by a byte stride */ |
| #define STRIDE_F(p, i) (p = (GLfloat *)((GLubyte *)p + i)) |
| /** Stepping a GLuint pointer by a byte stride */ |
| #define STRIDE_UI(p, i) (p = (GLuint *)((GLubyte *)p + i)) |
| /** Stepping a GLubyte[4] pointer by a byte stride */ |
| #define STRIDE_4UB(p, i) (p = (GLubyte (*)[4])((GLubyte *)p + i)) |
| /** Stepping a GLfloat[4] pointer by a byte stride */ |
| #define STRIDE_4F(p, i) (p = (GLfloat (*)[4])((GLubyte *)p + i)) |
| /** Stepping a GLchan[4] pointer by a byte stride */ |
| #define STRIDE_4CHAN(p, i) (p = (GLchan (*)[4])((GLubyte *)p + i)) |
| /** Stepping a GLchan pointer by a byte stride */ |
| #define STRIDE_CHAN(p, i) (p = (GLchan *)((GLubyte *)p + i)) |
| /** Stepping a \p t pointer by a byte stride */ |
| #define STRIDE_T(p, t, i) (p = (t)((GLubyte *)p + i)) |
| |
| |
| /**********************************************************************/ |
| /** \name 4-element vector operations */ |
| /*@{*/ |
| |
| /** Zero */ |
| #define ZERO_4V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = (DST)[3] = 0 |
| |
| /** Test for equality */ |
| #define TEST_EQ_4V(a,b) ((a)[0] == (b)[0] && \ |
| (a)[1] == (b)[1] && \ |
| (a)[2] == (b)[2] && \ |
| (a)[3] == (b)[3]) |
| |
| /** Test for equality (unsigned bytes) */ |
| #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 a 4-element vector */ |
| #define COPY_4V( DST, SRC ) \ |
| do { \ |
| (DST)[0] = (SRC)[0]; \ |
| (DST)[1] = (SRC)[1]; \ |
| (DST)[2] = (SRC)[2]; \ |
| (DST)[3] = (SRC)[3]; \ |
| } while (0) |
| |
| /** Copy a 4-element vector with cast */ |
| #define COPY_4V_CAST( DST, SRC, CAST ) \ |
| do { \ |
| (DST)[0] = (CAST)(SRC)[0]; \ |
| (DST)[1] = (CAST)(SRC)[1]; \ |
| (DST)[2] = (CAST)(SRC)[2]; \ |
| (DST)[3] = (CAST)(SRC)[3]; \ |
| } while (0) |
| |
| /** Copy a 4-element unsigned byte vector */ |
| #if defined(__i386__) |
| #define COPY_4UBV(DST, SRC) \ |
| do { \ |
| *((GLuint*)(DST)) = *((GLuint*)(SRC)); \ |
| } while (0) |
| #else |
| /* The GLuint cast might fail if DST or SRC are not dword-aligned (RISC) */ |
| #define COPY_4UBV(DST, SRC) \ |
| do { \ |
| (DST)[0] = (SRC)[0]; \ |
| (DST)[1] = (SRC)[1]; \ |
| (DST)[2] = (SRC)[2]; \ |
| (DST)[3] = (SRC)[3]; \ |
| } while (0) |
| #endif |
| |
| /** |
| * Copy a 4-element float vector (avoid using FPU registers) |
| * XXX Could use two 64-bit moves on 64-bit systems |
| */ |
| #define COPY_4FV( DST, SRC ) \ |
| do { \ |
| const GLuint *_s = (const GLuint *) (SRC); \ |
| GLuint *_d = (GLuint *) (DST); \ |
| _d[0] = _s[0]; \ |
| _d[1] = _s[1]; \ |
| _d[2] = _s[2]; \ |
| _d[3] = _s[3]; \ |
| } while (0) |
| |
| /** Copy \p SZ elements into a 4-element vector */ |
| #define COPY_SZ_4V(DST, SZ, SRC) \ |
| do { \ |
| 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]; \ |
| } \ |
| } while(0) |
| |
| /** Copy \p SZ elements into a homegeneous (4-element) vector, giving |
| * default values to the remaining */ |
| #define COPY_CLEAN_4V(DST, SZ, SRC) \ |
| do { \ |
| ASSIGN_4V( DST, 0, 0, 0, 1 ); \ |
| COPY_SZ_4V( DST, SZ, SRC ); \ |
| } while (0) |
| |
| /** Subtraction */ |
| #define SUB_4V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] - (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] - (SRCB)[1]; \ |
| (DST)[2] = (SRCA)[2] - (SRCB)[2]; \ |
| (DST)[3] = (SRCA)[3] - (SRCB)[3]; \ |
| } while (0) |
| |
| /** Addition */ |
| #define ADD_4V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] + (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] + (SRCB)[1]; \ |
| (DST)[2] = (SRCA)[2] + (SRCB)[2]; \ |
| (DST)[3] = (SRCA)[3] + (SRCB)[3]; \ |
| } while (0) |
| |
| /** Element-wise multiplication */ |
| #define SCALE_4V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] * (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] * (SRCB)[1]; \ |
| (DST)[2] = (SRCA)[2] * (SRCB)[2]; \ |
| (DST)[3] = (SRCA)[3] * (SRCB)[3]; \ |
| } while (0) |
| |
| /** In-place addition */ |
| #define ACC_4V( DST, SRC ) \ |
| do { \ |
| (DST)[0] += (SRC)[0]; \ |
| (DST)[1] += (SRC)[1]; \ |
| (DST)[2] += (SRC)[2]; \ |
| (DST)[3] += (SRC)[3]; \ |
| } while (0) |
| |
| /** Element-wise multiplication and addition */ |
| #define ACC_SCALE_4V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] += (SRCA)[0] * (SRCB)[0]; \ |
| (DST)[1] += (SRCA)[1] * (SRCB)[1]; \ |
| (DST)[2] += (SRCA)[2] * (SRCB)[2]; \ |
| (DST)[3] += (SRCA)[3] * (SRCB)[3]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication and addition */ |
| #define ACC_SCALE_SCALAR_4V( DST, S, SRCB ) \ |
| do { \ |
| (DST)[0] += S * (SRCB)[0]; \ |
| (DST)[1] += S * (SRCB)[1]; \ |
| (DST)[2] += S * (SRCB)[2]; \ |
| (DST)[3] += S * (SRCB)[3]; \ |
| } while (0) |
| |
| /** Scalar multiplication */ |
| #define SCALE_SCALAR_4V( DST, S, SRCB ) \ |
| do { \ |
| (DST)[0] = S * (SRCB)[0]; \ |
| (DST)[1] = S * (SRCB)[1]; \ |
| (DST)[2] = S * (SRCB)[2]; \ |
| (DST)[3] = S * (SRCB)[3]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication */ |
| #define SELF_SCALE_SCALAR_4V( DST, S ) \ |
| do { \ |
| (DST)[0] *= S; \ |
| (DST)[1] *= S; \ |
| (DST)[2] *= S; \ |
| (DST)[3] *= S; \ |
| } while (0) |
| |
| /** Assignment */ |
| #define ASSIGN_4V( V, V0, V1, V2, V3 ) \ |
| do { \ |
| V[0] = V0; \ |
| V[1] = V1; \ |
| V[2] = V2; \ |
| V[3] = V3; \ |
| } while(0) |
| |
| /*@}*/ |
| |
| |
| /**********************************************************************/ |
| /** \name 3-element vector operations*/ |
| /*@{*/ |
| |
| /** Zero */ |
| #define ZERO_3V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = 0 |
| |
| /** Test for equality */ |
| #define TEST_EQ_3V(a,b) \ |
| ((a)[0] == (b)[0] && \ |
| (a)[1] == (b)[1] && \ |
| (a)[2] == (b)[2]) |
| |
| /** Copy a 3-element vector */ |
| #define COPY_3V( DST, SRC ) \ |
| do { \ |
| (DST)[0] = (SRC)[0]; \ |
| (DST)[1] = (SRC)[1]; \ |
| (DST)[2] = (SRC)[2]; \ |
| } while (0) |
| |
| /** Copy a 3-element vector with cast */ |
| #define COPY_3V_CAST( DST, SRC, CAST ) \ |
| do { \ |
| (DST)[0] = (CAST)(SRC)[0]; \ |
| (DST)[1] = (CAST)(SRC)[1]; \ |
| (DST)[2] = (CAST)(SRC)[2]; \ |
| } while (0) |
| |
| /** Copy a 3-element float vector */ |
| #define COPY_3FV( DST, SRC ) \ |
| do { \ |
| const GLfloat *_tmp = (SRC); \ |
| (DST)[0] = _tmp[0]; \ |
| (DST)[1] = _tmp[1]; \ |
| (DST)[2] = _tmp[2]; \ |
| } while (0) |
| |
| /** Subtraction */ |
| #define SUB_3V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] - (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] - (SRCB)[1]; \ |
| (DST)[2] = (SRCA)[2] - (SRCB)[2]; \ |
| } while (0) |
| |
| /** Addition */ |
| #define ADD_3V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] + (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] + (SRCB)[1]; \ |
| (DST)[2] = (SRCA)[2] + (SRCB)[2]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication */ |
| #define SCALE_3V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] * (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] * (SRCB)[1]; \ |
| (DST)[2] = (SRCA)[2] * (SRCB)[2]; \ |
| } while (0) |
| |
| /** In-place element-wise multiplication */ |
| #define SELF_SCALE_3V( DST, SRC ) \ |
| do { \ |
| (DST)[0] *= (SRC)[0]; \ |
| (DST)[1] *= (SRC)[1]; \ |
| (DST)[2] *= (SRC)[2]; \ |
| } while (0) |
| |
| /** In-place addition */ |
| #define ACC_3V( DST, SRC ) \ |
| do { \ |
| (DST)[0] += (SRC)[0]; \ |
| (DST)[1] += (SRC)[1]; \ |
| (DST)[2] += (SRC)[2]; \ |
| } while (0) |
| |
| /** Element-wise multiplication and addition */ |
| #define ACC_SCALE_3V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] += (SRCA)[0] * (SRCB)[0]; \ |
| (DST)[1] += (SRCA)[1] * (SRCB)[1]; \ |
| (DST)[2] += (SRCA)[2] * (SRCB)[2]; \ |
| } while (0) |
| |
| /** Scalar multiplication */ |
| #define SCALE_SCALAR_3V( DST, S, SRCB ) \ |
| do { \ |
| (DST)[0] = S * (SRCB)[0]; \ |
| (DST)[1] = S * (SRCB)[1]; \ |
| (DST)[2] = S * (SRCB)[2]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication and addition */ |
| #define ACC_SCALE_SCALAR_3V( DST, S, SRCB ) \ |
| do { \ |
| (DST)[0] += S * (SRCB)[0]; \ |
| (DST)[1] += S * (SRCB)[1]; \ |
| (DST)[2] += S * (SRCB)[2]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication */ |
| #define SELF_SCALE_SCALAR_3V( DST, S ) \ |
| do { \ |
| (DST)[0] *= S; \ |
| (DST)[1] *= S; \ |
| (DST)[2] *= S; \ |
| } while (0) |
| |
| /** In-place scalar addition */ |
| #define ACC_SCALAR_3V( DST, S ) \ |
| do { \ |
| (DST)[0] += S; \ |
| (DST)[1] += S; \ |
| (DST)[2] += S; \ |
| } while (0) |
| |
| /** Assignment */ |
| #define ASSIGN_3V( V, V0, V1, V2 ) \ |
| do { \ |
| V[0] = V0; \ |
| V[1] = V1; \ |
| V[2] = V2; \ |
| } while(0) |
| |
| /*@}*/ |
| |
| |
| /**********************************************************************/ |
| /** \name 2-element vector operations*/ |
| /*@{*/ |
| |
| /** Zero */ |
| #define ZERO_2V( DST ) (DST)[0] = (DST)[1] = 0 |
| |
| /** Copy a 2-element vector */ |
| #define COPY_2V( DST, SRC ) \ |
| do { \ |
| (DST)[0] = (SRC)[0]; \ |
| (DST)[1] = (SRC)[1]; \ |
| } while (0) |
| |
| /** Copy a 2-element vector with cast */ |
| #define COPY_2V_CAST( DST, SRC, CAST ) \ |
| do { \ |
| (DST)[0] = (CAST)(SRC)[0]; \ |
| (DST)[1] = (CAST)(SRC)[1]; \ |
| } while (0) |
| |
| /** Copy a 2-element float vector */ |
| #define COPY_2FV( DST, SRC ) \ |
| do { \ |
| const GLfloat *_tmp = (SRC); \ |
| (DST)[0] = _tmp[0]; \ |
| (DST)[1] = _tmp[1]; \ |
| } while (0) |
| |
| /** Subtraction */ |
| #define SUB_2V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] - (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] - (SRCB)[1]; \ |
| } while (0) |
| |
| /** Addition */ |
| #define ADD_2V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] + (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] + (SRCB)[1]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication */ |
| #define SCALE_2V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] = (SRCA)[0] * (SRCB)[0]; \ |
| (DST)[1] = (SRCA)[1] * (SRCB)[1]; \ |
| } while (0) |
| |
| /** In-place addition */ |
| #define ACC_2V( DST, SRC ) \ |
| do { \ |
| (DST)[0] += (SRC)[0]; \ |
| (DST)[1] += (SRC)[1]; \ |
| } while (0) |
| |
| /** Element-wise multiplication and addition */ |
| #define ACC_SCALE_2V( DST, SRCA, SRCB ) \ |
| do { \ |
| (DST)[0] += (SRCA)[0] * (SRCB)[0]; \ |
| (DST)[1] += (SRCA)[1] * (SRCB)[1]; \ |
| } while (0) |
| |
| /** Scalar multiplication */ |
| #define SCALE_SCALAR_2V( DST, S, SRCB ) \ |
| do { \ |
| (DST)[0] = S * (SRCB)[0]; \ |
| (DST)[1] = S * (SRCB)[1]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication and addition */ |
| #define ACC_SCALE_SCALAR_2V( DST, S, SRCB ) \ |
| do { \ |
| (DST)[0] += S * (SRCB)[0]; \ |
| (DST)[1] += S * (SRCB)[1]; \ |
| } while (0) |
| |
| /** In-place scalar multiplication */ |
| #define SELF_SCALE_SCALAR_2V( DST, S ) \ |
| do { \ |
| (DST)[0] *= S; \ |
| (DST)[1] *= S; \ |
| } while (0) |
| |
| /** In-place scalar addition */ |
| #define ACC_SCALAR_2V( DST, S ) \ |
| do { \ |
| (DST)[0] += S; \ |
| (DST)[1] += S; \ |
| } while (0) |
| |
| /** Assign scalers to short vectors */ |
| #define ASSIGN_2V( V, V0, V1 ) \ |
| do { \ |
| V[0] = V0; \ |
| V[1] = V1; \ |
| } while(0) |
| |
| /*@}*/ |
| |
| |
| /** \name Linear interpolation macros */ |
| /*@{*/ |
| |
| /** |
| * Linear interpolation |
| * |
| * \note \p OUT argument is evaluated twice! |
| * \note Be wary of using *coord++ as an argument to any of these macros! |
| */ |
| #define LINTERP(T, OUT, IN) ((OUT) + (T) * ((IN) - (OUT))) |
| |
| /* Can do better with integer math |
| */ |
| #define INTERP_UB( t, dstub, outub, inub ) \ |
| do { \ |
| GLfloat inf = UBYTE_TO_FLOAT( inub ); \ |
| GLfloat outf = UBYTE_TO_FLOAT( outub ); \ |
| GLfloat dstf = LINTERP( t, outf, inf ); \ |
| UNCLAMPED_FLOAT_TO_UBYTE( dstub, dstf ); \ |
| } while (0) |
| |
| #define INTERP_CHAN( t, dstc, outc, inc ) \ |
| do { \ |
| GLfloat inf = CHAN_TO_FLOAT( inc ); \ |
| GLfloat outf = CHAN_TO_FLOAT( outc ); \ |
| GLfloat dstf = LINTERP( t, outf, inf ); \ |
| UNCLAMPED_FLOAT_TO_CHAN( dstc, dstf ); \ |
| } while (0) |
| |
| #define INTERP_UI( t, dstui, outui, inui ) \ |
| dstui = (GLuint) (GLint) LINTERP( (t), (GLfloat) (outui), (GLfloat) (inui) ) |
| |
| #define INTERP_F( t, dstf, outf, inf ) \ |
| dstf = LINTERP( t, outf, inf ) |
| |
| #define INTERP_4F( t, dst, out, in ) \ |
| do { \ |
| dst[0] = LINTERP( (t), (out)[0], (in)[0] ); \ |
| dst[1] = LINTERP( (t), (out)[1], (in)[1] ); \ |
| dst[2] = LINTERP( (t), (out)[2], (in)[2] ); \ |
| dst[3] = LINTERP( (t), (out)[3], (in)[3] ); \ |
| } while (0) |
| |
| #define INTERP_3F( t, dst, out, in ) \ |
| do { \ |
| dst[0] = LINTERP( (t), (out)[0], (in)[0] ); \ |
| dst[1] = LINTERP( (t), (out)[1], (in)[1] ); \ |
| dst[2] = LINTERP( (t), (out)[2], (in)[2] ); \ |
| } while (0) |
| |
| #define INTERP_4CHAN( t, dst, out, in ) \ |
| do { \ |
| INTERP_CHAN( (t), (dst)[0], (out)[0], (in)[0] ); \ |
| INTERP_CHAN( (t), (dst)[1], (out)[1], (in)[1] ); \ |
| INTERP_CHAN( (t), (dst)[2], (out)[2], (in)[2] ); \ |
| INTERP_CHAN( (t), (dst)[3], (out)[3], (in)[3] ); \ |
| } while (0) |
| |
| #define INTERP_3CHAN( t, dst, out, in ) \ |
| do { \ |
| INTERP_CHAN( (t), (dst)[0], (out)[0], (in)[0] ); \ |
| INTERP_CHAN( (t), (dst)[1], (out)[1], (in)[1] ); \ |
| INTERP_CHAN( (t), (dst)[2], (out)[2], (in)[2] ); \ |
| } while (0) |
| |
| #define INTERP_SZ( t, vec, to, out, in, sz ) \ |
| do { \ |
| switch (sz) { \ |
| case 4: vec[to][3] = LINTERP( (t), (vec)[out][3], (vec)[in][3] ); \ |
| case 3: vec[to][2] = LINTERP( (t), (vec)[out][2], (vec)[in][2] ); \ |
| case 2: vec[to][1] = LINTERP( (t), (vec)[out][1], (vec)[in][1] ); \ |
| case 1: vec[to][0] = LINTERP( (t), (vec)[out][0], (vec)[in][0] ); \ |
| } \ |
| } while(0) |
| |
| /*@}*/ |
| |
| |
| |
| /** 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)) ) |
| |
| |
| |
| /** Minimum of two values: */ |
| #define MIN2( A, B ) ( (A)<(B) ? (A) : (B) ) |
| |
| /** Maximum 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] ) |
| |
| /** Dot product of two 4-element vectors */ |
| #define DOT4V(v,a,b,c,d) (v[0]*(a) + v[1]*(b) + v[2]*(c) + v[3]*(d)) |
| |
| |
| /** Cross product of two 3-element vectors */ |
| #define CROSS3(n, u, v) \ |
| do { \ |
| (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]; \ |
| } while (0) |
| |
| |
| /* Normalize a 3-element vector to unit length. */ |
| #define NORMALIZE_3FV( V ) \ |
| do { \ |
| GLfloat len = (GLfloat) LEN_SQUARED_3FV(V); \ |
| if (len) { \ |
| len = INV_SQRTF(len); \ |
| (V)[0] = (GLfloat) ((V)[0] * len); \ |
| (V)[1] = (GLfloat) ((V)[1] * len); \ |
| (V)[2] = (GLfloat) ((V)[2] * len); \ |
| } \ |
| } while(0) |
| |
| #define LEN_3FV( V ) (SQRTF((V)[0]*(V)[0]+(V)[1]*(V)[1]+(V)[2]*(V)[2])) |
| #define LEN_2FV( V ) (SQRTF((V)[0]*(V)[0]+(V)[1]*(V)[1])) |
| |
| #define LEN_SQUARED_3FV( V ) ((V)[0]*(V)[0]+(V)[1]*(V)[1]+(V)[2]*(V)[2]) |
| #define LEN_SQUARED_2FV( V ) ((V)[0]*(V)[0]+(V)[1]*(V)[1]) |
| |
| |
| #endif |
