core | glapi | vbo | math | shader | swrast | swrast_setup | tnl | tnl_dd

macros.h File Reference

Detailed Description

A collection of useful macros.

#include "imports.h"

Integer / float conversion for colors, normals, etc.

#define UBYTE_TO_FLOAT(u)   _mesa_ubyte_to_float_color_tab[(unsigned int)(u)]
#define FLOAT_TO_UBYTE(X)   ((GLubyte) (GLint) ((X) * 255.0F))
 Convert GLfloat in [0.0,1.0] to GLubyte in [0,255].
#define BYTE_TO_FLOAT(B)   ((2.0F * (B) + 1.0F) * (1.0F/255.0F))
 Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0].
#define FLOAT_TO_BYTE(X)   ( (((GLint) (255.0F * (X))) - 1) / 2 )
 Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127].
#define BYTE_TO_FLOAT_TEX(B)   ((B) == -128 ? -1.0F : (B) * (1.0F/127.0F))
 Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0], texture/fb data.
#define FLOAT_TO_BYTE_TEX(X)   ( (GLint) (127.0F * (X)) )
 Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127], texture/fb data.
#define USHORT_TO_FLOAT(S)   ((GLfloat) (S) * (1.0F / 65535.0F))
 Convert GLushort in [0,65535] to GLfloat in [0.0,1.0].
#define FLOAT_TO_USHORT(X)   ((GLuint) ((X) * 65535.0F))
 Convert GLfloat in [0.0,1.0] to GLushort in [0, 65535].
#define SHORT_TO_FLOAT(S)   ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))
 Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0].
#define FLOAT_TO_SHORT(X)   ( (((GLint) (65535.0F * (X))) - 1) / 2 )
 Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767].
#define SHORT_TO_FLOAT_TEX(S)   ((S) == -32768 ? -1.0F : (S) * (1.0F/32767.0F))
 Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0], texture/fb data.
#define FLOAT_TO_SHORT_TEX(X)   ( (GLint) (32767.0F * (X)) )
 Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767], texture/fb data.
#define UINT_TO_FLOAT(U)   ((GLfloat) (U) * (1.0F / 4294967295.0))
 Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0].
#define FLOAT_TO_UINT(X)   ((GLuint) ((X) * 4294967295.0))
 Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295].
#define INT_TO_FLOAT(I)   ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0))
 Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0].
#define FLOAT_TO_INT(X)   ( (GLint) (2147483647.0 * (X)) )
 Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647].
#define FLOAT_TO_INT64(X)   ( (GLint64) (9223372036854775807.0 * (double)(X)) )
 Convert GLfloat in [-1.0,1.0] to GLint64 in [-(1<<63),(1 << 63) -1].
#define INT_TO_FLOAT_TEX(I)   ((I) == -2147483648 ? -1.0F : (I) * (1.0F/2147483647.0))
 Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0], texture/fb data.
#define FLOAT_TO_INT_TEX(X)   ( (GLint) (2147483647.0 * (X)) )
 Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647], texture/fb data.
#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), 0.0F, 1.0F) * 65535.0F) )
#define CLAMPED_FLOAT_TO_USHORT(us, f)   us = ( (GLushort) IROUND( (f) * 65535.0F) )
GLfloat _mesa_ubyte_to_float_color_tab [256]
 Convert GLubyte in [0,255] to GLfloat in [0.0,1.0].

Defines

#define STRIDE_F(p, i)   (p = (GLfloat *)((GLubyte *)p + i))
 Stepping a GLfloat pointer by a byte stride.
#define STRIDE_UI(p, i)   (p = (GLuint *)((GLubyte *)p + i))
 Stepping a GLuint pointer by a byte stride.
#define STRIDE_4UB(p, i)   (p = (GLubyte (*)[4])((GLubyte *)p + i))
 Stepping a GLubyte[4] pointer by a byte stride.
#define STRIDE_4F(p, i)   (p = (GLfloat (*)[4])((GLubyte *)p + i))
 Stepping a GLfloat[4] pointer by a byte stride.
#define STRIDE_4CHAN(p, i)   (p = (GLchan (*)[4])((GLubyte *)p + i))
 Stepping a GLchan[4] pointer by a byte stride.
#define STRIDE_CHAN(p, i)   (p = (GLchan *)((GLubyte *)p + i))
 Stepping a GLchan pointer by a byte stride.
#define STRIDE_T(p, t, i)   (p = (t)((GLubyte *)p + i))
 Stepping a t pointer by a byte stride.
#define CLAMP(X, MIN, MAX)   ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
 Clamp X to [MIN,MAX].
#define CLAMP_SELF(x, mn, mx)   ( (x)<(mn) ? ((x) = (mn)) : ((x)>(mx) ? ((x)=(mx)) : (x)) )
 Assign X to CLAMP(X, MIN, MAX).
#define MIN2(A, B)   ( (A)<(B) ? (A) : (B) )
 Minimum of two values:.
#define MAX2(A, B)   ( (A)>(B) ? (A) : (B) )
 Maximum of two values:.
#define DOT2(a, b)   ( (a)[0]*(b)[0] + (a)[1]*(b)[1] )
 Dot product of two 2-element vectors.
#define DOT3(a, b)   ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2]*(b)[2] )
 Dot product of two 3-element vectors.
#define DOT4(a, b)
 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))
 Dot product of two 4-element vectors.
#define CROSS3(n, u, v)
 Cross product of two 3-element vectors.
#define NORMALIZE_3FV(V)
#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])
#define ENUM_TO_INT(E)   ((GLint)(E))
 casts to silence warnings with some compilers
#define ENUM_TO_FLOAT(E)   ((GLfloat)(GLint)(E))
#define ENUM_TO_DOUBLE(E)   ((GLdouble)(GLint)(E))
#define ENUM_TO_BOOLEAN(E)   ((E) ? GL_TRUE : GL_FALSE)
4-element vector operations
#define ZERO_4V(DST)   (DST)[0] = (DST)[1] = (DST)[2] = (DST)[3] = 0
 Zero.
#define TEST_EQ_4V(a, b)
 Test for equality.
#define TEST_EQ_4UBV(DST, SRC)   TEST_EQ_4V(DST, SRC)
 Test for equality (unsigned bytes).
#define COPY_4V(DST, SRC)
 Copy a 4-element vector.
#define COPY_4V_CAST(DST, SRC, CAST)
 Copy a 4-element vector with cast.
#define COPY_4UBV(DST, SRC)
 Copy a 4-element unsigned byte vector.
#define COPY_4FV(DST, SRC)
 Copy a 4-element float vector (avoid using FPU registers) XXX Could use two 64-bit moves on 64-bit systems.
#define COPY_SZ_4V(DST, SZ, SRC)
 Copy SZ elements into a 4-element vector.
#define COPY_CLEAN_4V(DST, SZ, SRC)
 Copy SZ elements into a homegeneous (4-element) vector, giving default values to the remaining.
#define SUB_4V(DST, SRCA, SRCB)
 Subtraction.
#define ADD_4V(DST, SRCA, SRCB)
 Addition.
#define SCALE_4V(DST, SRCA, SRCB)
 Element-wise multiplication.
#define ACC_4V(DST, SRC)
 In-place addition.
#define ACC_SCALE_4V(DST, SRCA, SRCB)
 Element-wise multiplication and addition.
#define ACC_SCALE_SCALAR_4V(DST, S, SRCB)
 In-place scalar multiplication and addition.
#define SCALE_SCALAR_4V(DST, S, SRCB)
 Scalar multiplication.
#define SELF_SCALE_SCALAR_4V(DST, S)
 In-place scalar multiplication.
#define ASSIGN_4V(V, V0, V1, V2, V3)
 Assignment.
3-element vector operations
#define ZERO_3V(DST)   (DST)[0] = (DST)[1] = (DST)[2] = 0
 Zero.
#define TEST_EQ_3V(a, b)
 Test for equality.
#define COPY_3V(DST, SRC)
 Copy a 3-element vector.
#define COPY_3V_CAST(DST, SRC, CAST)
 Copy a 3-element vector with cast.
#define COPY_3FV(DST, SRC)
 Copy a 3-element float vector.
#define SUB_3V(DST, SRCA, SRCB)
 Subtraction.
#define ADD_3V(DST, SRCA, SRCB)
 Addition.
#define SCALE_3V(DST, SRCA, SRCB)
 In-place scalar multiplication.
#define SELF_SCALE_3V(DST, SRC)
 In-place element-wise multiplication.
#define ACC_3V(DST, SRC)
 In-place addition.
#define ACC_SCALE_3V(DST, SRCA, SRCB)
 Element-wise multiplication and addition.
#define SCALE_SCALAR_3V(DST, S, SRCB)
 Scalar multiplication.
#define ACC_SCALE_SCALAR_3V(DST, S, SRCB)
 In-place scalar multiplication and addition.
#define SELF_SCALE_SCALAR_3V(DST, S)
 In-place scalar multiplication.
#define ACC_SCALAR_3V(DST, S)
 In-place scalar addition.
#define ASSIGN_3V(V, V0, V1, V2)
 Assignment.
2-element vector operations
#define ZERO_2V(DST)   (DST)[0] = (DST)[1] = 0
 Zero.
#define COPY_2V(DST, SRC)
 Copy a 2-element vector.
#define COPY_2V_CAST(DST, SRC, CAST)
 Copy a 2-element vector with cast.
#define COPY_2FV(DST, SRC)
 Copy a 2-element float vector.
#define SUB_2V(DST, SRCA, SRCB)
 Subtraction.
#define ADD_2V(DST, SRCA, SRCB)
 Addition.
#define SCALE_2V(DST, SRCA, SRCB)
 In-place scalar multiplication.
#define ACC_2V(DST, SRC)
 In-place addition.
#define ACC_SCALE_2V(DST, SRCA, SRCB)
 Element-wise multiplication and addition.
#define SCALE_SCALAR_2V(DST, S, SRCB)
 Scalar multiplication.
#define ACC_SCALE_SCALAR_2V(DST, S, SRCB)
 In-place scalar multiplication and addition.
#define SELF_SCALE_SCALAR_2V(DST, S)
 In-place scalar multiplication.
#define ACC_SCALAR_2V(DST, S)
 In-place scalar addition.
#define ASSIGN_2V(V, V0, V1)
 Assign scalers to short vectors.
Linear interpolation macros
#define LINTERP(T, OUT, IN)   ((OUT) + (T) * ((IN) - (OUT)))
 Linear interpolation.
#define INTERP_UB(t, dstub, outub, inub)
#define INTERP_CHAN(t, dstc, outc, inc)
#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)
#define INTERP_3F(t, dst, out, in)
#define INTERP_4CHAN(t, dst, out, in)
#define INTERP_3CHAN(t, dst, out, in)
#define INTERP_SZ(t, vec, to, out, in, sz)

Define Documentation

#define ACC_2V ( DST,
SRC   ) 

Value:

do {                        \
      (DST)[0] += (SRC)[0];         \
      (DST)[1] += (SRC)[1];         \
} while (0)
In-place addition.

#define ACC_3V ( DST,
SRC   ) 

Value:

do {                                \
      (DST)[0] += (SRC)[0];         \
      (DST)[1] += (SRC)[1];         \
      (DST)[2] += (SRC)[2];         \
} while (0)
In-place addition.

#define ACC_4V ( DST,
SRC   ) 

Value:

do {                                \
      (DST)[0] += (SRC)[0];         \
      (DST)[1] += (SRC)[1];         \
      (DST)[2] += (SRC)[2];         \
      (DST)[3] += (SRC)[3];         \
} while (0)
In-place addition.

#define ACC_SCALAR_2V ( DST,
S   ) 

Value:

do {                        \
      (DST)[0] += S;                \
      (DST)[1] += S;                \
} while (0)
In-place scalar addition.

#define ACC_SCALAR_3V ( DST,
S   ) 

Value:

do {                                \
      (DST)[0] += S;                \
      (DST)[1] += S;                \
      (DST)[2] += S;                \
} while (0)
In-place scalar addition.

#define ACC_SCALE_2V ( DST,
SRCA,
SRCB   ) 

Value:

do {                        \
      (DST)[0] += (SRCA)[0] * (SRCB)[0];    \
      (DST)[1] += (SRCA)[1] * (SRCB)[1];    \
} while (0)
Element-wise multiplication and addition.

#define ACC_SCALE_3V ( DST,
SRCA,
SRCB   ) 

Value:

do {                                        \
      (DST)[0] += (SRCA)[0] * (SRCB)[0];    \
      (DST)[1] += (SRCA)[1] * (SRCB)[1];    \
      (DST)[2] += (SRCA)[2] * (SRCB)[2];    \
} while (0)
Element-wise multiplication and addition.

#define ACC_SCALE_4V ( DST,
SRCA,
SRCB   ) 

Value:

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 and addition.

#define ACC_SCALE_SCALAR_2V ( DST,
S,
SRCB   ) 

Value:

do {                        \
      (DST)[0] += S * (SRCB)[0];        \
      (DST)[1] += S * (SRCB)[1];        \
} while (0)
In-place scalar multiplication and addition.

#define ACC_SCALE_SCALAR_3V ( DST,
S,
SRCB   ) 

Value:

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_4V ( DST,
S,
SRCB   ) 

Value:

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 and addition.

#define ADD_2V ( DST,
SRCA,
SRCB   ) 

Value:

do {                        \
      (DST)[0] = (SRCA)[0] + (SRCB)[0];     \
      (DST)[1] = (SRCA)[1] + (SRCB)[1];     \
} while (0)
Addition.

#define ADD_3V ( DST,
SRCA,
SRCB   ) 

Value:

do {                                    \
      (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
      (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
      (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
} while (0)
Addition.

#define ADD_4V ( DST,
SRCA,
SRCB   ) 

Value:

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 ASSIGN_2V ( V,
V0,
V1   ) 

Value:

do {                            \
    V[0] = V0;                  \
    V[1] = V1;                  \
} while(0)
Assign scalers to short vectors.

#define ASSIGN_3V ( V,
V0,
V1,
V2   ) 

Value:

do {                                \
    V[0] = V0;                      \
    V[1] = V1;                      \
    V[2] = V2;                      \
} while(0)
Assignment.

#define ASSIGN_4V ( V,
V0,
V1,
V2,
V3   ) 

Value:

do {                                    \
    V[0] = V0;                          \
    V[1] = V1;                          \
    V[2] = V2;                          \
    V[3] = V3;                          \
} while(0)
Assignment.

#define BYTE_TO_FLOAT ( B   )     ((2.0F * (B) + 1.0F) * (1.0F/255.0F))

Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0].

#define BYTE_TO_FLOAT_TEX ( B   )     ((B) == -128 ? -1.0F : (B) * (1.0F/127.0F))

Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0], texture/fb data.

#define BYTE_TO_UBYTE ( b   )     ((GLubyte) ((b) < 0 ? 0 : (GLubyte) (b)))

#define BYTE_TO_USHORT ( b   )     ((b) < 0 ? 0 : ((GLushort) (((b) * 65535) / 255)))

#define CLAMP ( X,
MIN,
MAX   )     ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )

Clamp X to [MIN,MAX].

#define CLAMP_SELF ( x,
mn,
mx   )     ( (x)<(mn) ? ((x) = (mn)) : ((x)>(mx) ? ((x)=(mx)) : (x)) )

Assign X to CLAMP(X, MIN, MAX).

#define CLAMPED_FLOAT_TO_USHORT ( us,
f   )     us = ( (GLushort) IROUND( (f) * 65535.0F) )

#define COPY_2FV ( DST,
SRC   ) 

Value:

do {                        \
   const GLfloat *_tmp = (SRC);         \
   (DST)[0] = _tmp[0];              \
   (DST)[1] = _tmp[1];              \
} while (0)
Copy a 2-element float vector.

#define COPY_2V ( DST,
SRC   ) 

Value:

do {                        \
   (DST)[0] = (SRC)[0];             \
   (DST)[1] = (SRC)[1];             \
} while (0)
Copy a 2-element vector.

#define COPY_2V_CAST ( DST,
SRC,
CAST   ) 

Value:

do {                        \
   (DST)[0] = (CAST)(SRC)[0];           \
   (DST)[1] = (CAST)(SRC)[1];           \
} while (0)
Copy a 2-element vector with cast.

#define COPY_3FV ( DST,
SRC   ) 

Value:

do {                                \
   const GLfloat *_tmp = (SRC);     \
   (DST)[0] = _tmp[0];              \
   (DST)[1] = _tmp[1];              \
   (DST)[2] = _tmp[2];              \
} while (0)
Copy a 3-element float vector.

#define COPY_3V ( DST,
SRC   ) 

Value:

do {                                \
   (DST)[0] = (SRC)[0];             \
   (DST)[1] = (SRC)[1];             \
   (DST)[2] = (SRC)[2];             \
} while (0)
Copy a 3-element vector.

#define COPY_3V_CAST ( DST,
SRC,
CAST   ) 

Value:

do {                                    \
   (DST)[0] = (CAST)(SRC)[0];           \
   (DST)[1] = (CAST)(SRC)[1];           \
   (DST)[2] = (CAST)(SRC)[2];           \
} while (0)
Copy a 3-element vector with cast.

#define COPY_4FV ( DST,
SRC   ) 

Value:

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 a 4-element float vector (avoid using FPU registers) XXX Could use two 64-bit moves on 64-bit systems.

#define COPY_4UBV ( DST,
SRC   ) 

Value:

do {                                \
   (DST)[0] = (SRC)[0];             \
   (DST)[1] = (SRC)[1];             \
   (DST)[2] = (SRC)[2];             \
   (DST)[3] = (SRC)[3];             \
} while (0)
Copy a 4-element unsigned byte vector.

#define COPY_4V ( DST,
SRC   ) 

Value:

do {                                \
   (DST)[0] = (SRC)[0];             \
   (DST)[1] = (SRC)[1];             \
   (DST)[2] = (SRC)[2];             \
   (DST)[3] = (SRC)[3];             \
} while (0)
Copy a 4-element vector.

#define COPY_4V_CAST ( DST,
SRC,
CAST   ) 

Value:

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 vector with cast.

#define COPY_CLEAN_4V ( DST,
SZ,
SRC   ) 

Value:

do {                                 \
      ASSIGN_4V( DST, 0, 0, 0, 1 );  \
      COPY_SZ_4V( DST, SZ, SRC );    \
} while (0)
Copy SZ elements into a homegeneous (4-element) vector, giving default values to the remaining.

#define COPY_SZ_4V ( DST,
SZ,
SRC   ) 

Value:

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 SZ elements into a 4-element vector.

#define CROSS3 ( n,
u,
v   ) 

Value:

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)
Cross product of two 3-element vectors.

#define DOT2 ( a,
b   )     ( (a)[0]*(b)[0] + (a)[1]*(b)[1] )

Dot product of two 2-element vectors.

#define DOT3 ( a,
b   )     ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2]*(b)[2] )

Dot product of two 3-element vectors.

#define DOT4 ( a,
b   ) 

Value:

( (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))

Dot product of two 4-element vectors.

#define ENUM_TO_BOOLEAN ( E   )     ((E) ? GL_TRUE : GL_FALSE)

#define ENUM_TO_DOUBLE ( E   )     ((GLdouble)(GLint)(E))

#define ENUM_TO_FLOAT ( E   )     ((GLfloat)(GLint)(E))

#define ENUM_TO_INT ( E   )     ((GLint)(E))

casts to silence warnings with some compilers

#define FLOAT_TO_BYTE ( X   )     ( (((GLint) (255.0F * (X))) - 1) / 2 )

Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127].

#define FLOAT_TO_BYTE_TEX ( X   )     ( (GLint) (127.0F * (X)) )

Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127], texture/fb data.

#define FLOAT_TO_INT ( X   )     ( (GLint) (2147483647.0 * (X)) )

Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647].

#define FLOAT_TO_INT64 ( X   )     ( (GLint64) (9223372036854775807.0 * (double)(X)) )

Convert GLfloat in [-1.0,1.0] to GLint64 in [-(1<<63),(1 << 63) -1].

#define FLOAT_TO_INT_TEX ( X   )     ( (GLint) (2147483647.0 * (X)) )

Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647], texture/fb data.

#define FLOAT_TO_SHORT ( X   )     ( (((GLint) (65535.0F * (X))) - 1) / 2 )

Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767].

#define FLOAT_TO_SHORT_TEX ( X   )     ( (GLint) (32767.0F * (X)) )

Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767], texture/fb data.

#define FLOAT_TO_UBYTE ( X   )     ((GLubyte) (GLint) ((X) * 255.0F))

Convert GLfloat in [0.0,1.0] to GLubyte in [0,255].

#define FLOAT_TO_UINT ( X   )     ((GLuint) ((X) * 4294967295.0))

Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295].

#define FLOAT_TO_USHORT ( X   )     ((GLuint) ((X) * 65535.0F))

Convert GLfloat in [0.0,1.0] to GLushort in [0, 65535].

#define INT_TO_FLOAT ( I   )     ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0))

Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0].

#define INT_TO_FLOAT_TEX ( I   )     ((I) == -2147483648 ? -1.0F : (I) * (1.0F/2147483647.0))

Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0], texture/fb data.

#define INT_TO_UBYTE ( i   )     ((GLubyte) ((i) < 0 ? 0 : (GLubyte) ((i) >> 23)))

#define INT_TO_USHORT ( i   )     ((i) < 0 ? 0 : ((GLushort) ((i) >> 15)))

#define INTERP_3CHAN ( t,
dst,
out,
in   ) 

Value:

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_3F ( t,
dst,
out,
in   ) 

Value:

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   ) 

Value:

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_4F ( t,
dst,
out,
in   ) 

Value:

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_CHAN ( t,
dstc,
outc,
inc   ) 

Value:

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_F ( t,
dstf,
outf,
inf   )     dstf = LINTERP( t, outf, inf )

#define INTERP_SZ ( t,
vec,
to,
out,
in,
sz   ) 

Value:

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)

#define INTERP_UB ( t,
dstub,
outub,
inub   ) 

Value:

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_UI ( t,
dstui,
outui,
inui   )     dstui = (GLuint) (GLint) LINTERP( (t), (GLfloat) (outui), (GLfloat) (inui) )

#define LEN_2FV ( V   )     (SQRTF((V)[0]*(V)[0]+(V)[1]*(V)[1]))

#define LEN_3FV ( V   )     (SQRTF((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])

#define LEN_SQUARED_3FV ( V   )     ((V)[0]*(V)[0]+(V)[1]*(V)[1]+(V)[2]*(V)[2])

#define LINTERP ( T,
OUT,
IN   )     ((OUT) + (T) * ((IN) - (OUT)))

Linear interpolation.

Note:
OUT argument is evaluated twice!

Be wary of using *coord++ as an argument to any of these macros!

#define MAX2 ( A,
B   )     ( (A)>(B) ? (A) : (B) )

Maximum of two values:.

#define MIN2 ( A,
B   )     ( (A)<(B) ? (A) : (B) )

Minimum of two values:.

#define NORMALIZE_3FV ( V   ) 

Value:

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 SCALE_2V ( DST,
SRCA,
SRCB   ) 

Value:

do {                        \
      (DST)[0] = (SRCA)[0] * (SRCB)[0];     \
      (DST)[1] = (SRCA)[1] * (SRCB)[1];     \
} while (0)
In-place scalar multiplication.

#define SCALE_3V ( DST,
SRCA,
SRCB   ) 

Value:

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_4V ( DST,
SRCA,
SRCB   ) 

Value:

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_SCALAR_2V ( DST,
S,
SRCB   ) 

Value:

do {                        \
      (DST)[0] = S * (SRCB)[0];         \
      (DST)[1] = S * (SRCB)[1];         \
} while (0)
Scalar multiplication.

#define SCALE_SCALAR_3V ( DST,
S,
SRCB   ) 

Value:

do {                                    \
      (DST)[0] = S * (SRCB)[0];         \
      (DST)[1] = S * (SRCB)[1];         \
      (DST)[2] = S * (SRCB)[2];         \
} while (0)
Scalar multiplication.

#define SCALE_SCALAR_4V ( DST,
S,
SRCB   ) 

Value:

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 SELF_SCALE_3V ( DST,
SRC   ) 

Value:

do {                                \
      (DST)[0] *= (SRC)[0];         \
      (DST)[1] *= (SRC)[1];         \
      (DST)[2] *= (SRC)[2];         \
} while (0)
In-place element-wise multiplication.

#define SELF_SCALE_SCALAR_2V ( DST,
S   ) 

Value:

do {                        \
      (DST)[0] *= S;                \
      (DST)[1] *= S;                \
} while (0)
In-place scalar multiplication.

#define SELF_SCALE_SCALAR_3V ( DST,
S   ) 

Value:

do {                                   \
      (DST)[0] *= S;                   \
      (DST)[1] *= S;                   \
      (DST)[2] *= S;                   \
} while (0)
In-place scalar multiplication.

#define SELF_SCALE_SCALAR_4V ( DST,
S   ) 

Value:

do {                                   \
      (DST)[0] *= S;                   \
      (DST)[1] *= S;                   \
      (DST)[2] *= S;                   \
      (DST)[3] *= S;                   \
} while (0)
In-place scalar multiplication.

#define SHORT_TO_FLOAT ( S   )     ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))

Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0].

#define SHORT_TO_FLOAT_TEX ( S   )     ((S) == -32768 ? -1.0F : (S) * (1.0F/32767.0F))

Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0], texture/fb data.

#define SHORT_TO_UBYTE ( s   )     ((GLubyte) ((s) < 0 ? 0 : (GLubyte) ((s) >> 7)))

#define SHORT_TO_USHORT ( s   )     ((s) < 0 ? 0 : ((GLushort) (((s) * 65535 / 32767))))

#define STRIDE_4CHAN ( p,
i   )     (p = (GLchan (*)[4])((GLubyte *)p + i))

Stepping a GLchan[4] pointer by a byte stride.

#define STRIDE_4F ( p,
i   )     (p = (GLfloat (*)[4])((GLubyte *)p + i))

Stepping a GLfloat[4] pointer by a byte stride.

#define STRIDE_4UB ( p,
i   )     (p = (GLubyte (*)[4])((GLubyte *)p + i))

Stepping a GLubyte[4] pointer by a byte stride.

#define STRIDE_CHAN ( p,
i   )     (p = (GLchan *)((GLubyte *)p + i))

Stepping a GLchan pointer by a byte stride.

#define STRIDE_F ( p,
i   )     (p = (GLfloat *)((GLubyte *)p + i))

Stepping a GLfloat pointer by a byte stride.

#define STRIDE_T ( p,
t,
i   )     (p = (t)((GLubyte *)p + i))

Stepping a t pointer by a byte stride.

#define STRIDE_UI ( p,
i   )     (p = (GLuint *)((GLubyte *)p + i))

Stepping a GLuint pointer by a byte stride.

#define SUB_2V ( DST,
SRCA,
SRCB   ) 

Value:

do {                        \
      (DST)[0] = (SRCA)[0] - (SRCB)[0];     \
      (DST)[1] = (SRCA)[1] - (SRCB)[1];     \
} while (0)
Subtraction.

#define SUB_3V ( DST,
SRCA,
SRCB   ) 

Value:

do {                                     \
      (DST)[0] = (SRCA)[0] - (SRCB)[0];  \
      (DST)[1] = (SRCA)[1] - (SRCB)[1];  \
      (DST)[2] = (SRCA)[2] - (SRCB)[2];  \
} while (0)
Subtraction.

#define SUB_4V ( DST,
SRCA,
SRCB   ) 

Value:

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)
Subtraction.

#define TEST_EQ_3V ( a,
b   ) 

Value:

((a)[0] == (b)[0] &&  \
    (a)[1] == (b)[1] &&  \
    (a)[2] == (b)[2])
Test for equality.

#define TEST_EQ_4UBV ( DST,
SRC   )     TEST_EQ_4V(DST, SRC)

Test for equality (unsigned bytes).

#define TEST_EQ_4V ( a,
b   ) 

Value:

((a)[0] == (b)[0] &&   \
              (a)[1] == (b)[1] &&   \
              (a)[2] == (b)[2] &&   \
              (a)[3] == (b)[3])
Test for equality.

#define UBYTE_TO_FLOAT ( u   )     _mesa_ubyte_to_float_color_tab[(unsigned int)(u)]

#define UBYTE_TO_USHORT ( b   )     (((GLushort) (b) << 8) | (GLushort) (b))

#define UINT_TO_FLOAT ( U   )     ((GLfloat) (U) * (1.0F / 4294967295.0))

Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0].

#define UINT_TO_UBYTE ( i   )     ((GLubyte) ((i) >> 24))

#define UINT_TO_USHORT ( i   )     ((i) < 0 ? 0 : ((GLushort) ((i) >> 16)))

#define UNCLAMPED_FLOAT_TO_USHORT ( us,
f   )     us = ( (GLushort) IROUND( CLAMP((f), 0.0F, 1.0F) * 65535.0F) )

#define USHORT_TO_FLOAT ( S   )     ((GLfloat) (S) * (1.0F / 65535.0F))

Convert GLushort in [0,65535] to GLfloat in [0.0,1.0].

#define USHORT_TO_UBYTE ( s   )     ((GLubyte) ((s) >> 8))

#define ZERO_2V ( DST   )     (DST)[0] = (DST)[1] = 0

Zero.

#define ZERO_3V ( DST   )     (DST)[0] = (DST)[1] = (DST)[2] = 0

Zero.

#define ZERO_4V ( DST   )     (DST)[0] = (DST)[1] = (DST)[2] = (DST)[3] = 0

Zero.

Variable Documentation

GLfloat _mesa_ubyte_to_float_color_tab[256]

Convert GLubyte in [0,255] to GLfloat in [0.0,1.0].

Generated on Sun Sep 27 06:47:46 2009 for Mesa Main by  doxygen 1.5.4