Mesa Source Code Documentation

#include "imports.h"
#include "config.h"
#include "macros.h"


Defines
#define	BYTE_TO_CHAN(b) ((b) < 0 ? 0 : (GLchan) (b))
	Convert from GLbyte to GLchan.
#define	UBYTE_TO_CHAN(b) (b)
	Convert from GLubyte to GLchan.
#define	SHORT_TO_CHAN(s) ((s) < 0 ? 0 : (GLchan) ((s) >> 7))
	Convert from GLshort to GLchan.
#define	USHORT_TO_CHAN(s) ((GLchan) ((s) >> 8))
	Convert from GLushort to GLchan.
#define	INT_TO_CHAN(i) ((i) < 0 ? 0 : (GLchan) ((i) >> 23))
	Convert from GLint to GLchan.
#define	UINT_TO_CHAN(i) ((GLchan) ((i) >> 24))
	Convert from GLuint to GLchan.
#define	CHAN_TO_UBYTE(c) (c)
	Convert from GLchan to GLubyte.
#define	CHAN_TO_FLOAT(c) UBYTE_TO_FLOAT(c)
	Convert from GLchan to GLfloat.
#define	CLAMPED_FLOAT_TO_CHAN(c, f) CLAMPED_FLOAT_TO_UBYTE(c, f)
	Convert from GLclampf to GLchan.
#define	UNCLAMPED_FLOAT_TO_CHAN(c, f) UNCLAMPED_FLOAT_TO_UBYTE(c, f)
	Convert from GLfloat to GLchan.
#define	COPY_CHAN4(DST, SRC) COPY_4UBV(DST, SRC)
	Copy a GLchan[4] array.
#define	UNCLAMPED_FLOAT_TO_RGB_CHAN(dst, f)
	Convert 3 channels at once.
#define	UNCLAMPED_FLOAT_TO_RGBA_CHAN(dst, f)
	Convert 4 channels at once.
Generic color packing macros. All inputs should be GLubytes.
Todo: We may move these into texstore.h at some point.
#define	PACK_COLOR_8888(X, Y, Z, W) (((X) << 24) \| ((Y) << 16) \| ((Z) << 8) \| (W))
#define	PACK_COLOR_8888_REV(X, Y, Z, W) (((W) << 24) \| ((Z) << 16) \| ((Y) << 8) \| (X))
#define	PACK_COLOR_888(X, Y, Z) (((X) << 16) \| ((Y) << 8) \| (Z))
#define	PACK_COLOR_565(X, Y, Z) ((((X) & 0xf8) << 8) \| (((Y) & 0xfc) << 3) \| (((Z) & 0xf8) >> 3))
#define	PACK_COLOR_565_REV(X, Y, Z) (((X) & 0xf8) \| ((Y) & 0xe0) >> 5 \| (((Y) & 0x1c) << 11) \| (((Z) & 0xf8) << 5))
#define	PACK_COLOR_5551(R, G, B, A)
#define	PACK_COLOR_1555(A, B, G, R)
#define	PACK_COLOR_1555_REV(A, B, G, R)
#define	PACK_COLOR_4444(R, G, B, A) ((((R) & 0xf0) << 8) \| (((G) & 0xf0) << 4) \| ((B) & 0xf0) \| ((A) >> 4))
#define	PACK_COLOR_4444_REV(R, G, B, A) ((((B) & 0xf0) << 8) \| (((A) & 0xf0) << 4) \| ((R) & 0xf0) \| ((G) >> 4))
#define	PACK_COLOR_88(L, A) (((L) << 8) \| (A))
#define	PACK_COLOR_88_REV(L, A) (((A) << 8) \| (L))
#define	PACK_COLOR_332(R, G, B) (((R) & 0xe0) \| (((G) & 0xe0) >> 3) \| (((B) & 0xc0) >> 6))
#define	PACK_COLOR_233(B, G, R) (((B) & 0xc0) \| (((G) & 0xe0) >> 2) \| (((R) & 0xe0) >> 5))

Define Documentation

#define BYTE_TO_CHAN ( b ) ((b) < 0 ? 0 : (GLchan) (b))

Convert from GLbyte to GLchan.

#define CHAN_TO_FLOAT ( c ) UBYTE_TO_FLOAT(c)

Convert from GLchan to GLfloat.

#define CHAN_TO_UBYTE ( c ) (c)

Convert from GLchan to GLubyte.

#define CLAMPED_FLOAT_TO_CHAN	(	c,
		f		)	CLAMPED_FLOAT_TO_UBYTE(c, f)

Convert from GLclampf to GLchan.

#define COPY_CHAN4	(	DST,
		SRC		)	COPY_4UBV(DST, SRC)

Copy a GLchan[4] array.

#define INT_TO_CHAN ( i ) ((i) < 0 ? 0 : (GLchan) ((i) >> 23))

Convert from GLint to GLchan.

#define PACK_COLOR_1555	(	A,
		B,
		G,
		R	)

Value:

((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) |      \
    ((A) ? 0x8000 : 0))

#define PACK_COLOR_1555_REV	(	A,
		B,
		G,
		R	)

Value:

((((B) & 0xf8) >> 1) | (((G) & 0xc0) >> 6) | (((G) & 0x38) << 10) | (((R) & 0xf8) << 5) |       \
    ((A) ? 0x80 : 0))

#define PACK_COLOR_233	(	B,
		G,
		R	)	(((B) & 0xc0) \| (((G) & 0xe0) >> 2) \| (((R) & 0xe0) >> 5))

#define PACK_COLOR_332	(	R,
		G,
		B	)	(((R) & 0xe0) \| (((G) & 0xe0) >> 3) \| (((B) & 0xc0) >> 6))

#define PACK_COLOR_4444	(	R,
		G,
		B,
		A	)	((((R) & 0xf0) << 8) \| (((G) & 0xf0) << 4) \| ((B) & 0xf0) \| ((A) >> 4))

#define PACK_COLOR_4444_REV	(	R,
		G,
		B,
		A	)	((((B) & 0xf0) << 8) \| (((A) & 0xf0) << 4) \| ((R) & 0xf0) \| ((G) >> 4))

#define PACK_COLOR_5551	(	R,
		G,
		B,
		A	)

Value:

((((R) & 0xf8) << 8) | (((G) & 0xf8) << 3) | (((B) & 0xf8) >> 2) |      \
    ((A) ? 1 : 0))

#define PACK_COLOR_565	(	X,
		Y,
		Z	)	((((X) & 0xf8) << 8) \| (((Y) & 0xfc) << 3) \| (((Z) & 0xf8) >> 3))

#define PACK_COLOR_565_REV	(	X,
		Y,
		Z	)	(((X) & 0xf8) \| ((Y) & 0xe0) >> 5 \| (((Y) & 0x1c) << 11) \| (((Z) & 0xf8) << 5))

#define PACK_COLOR_88	(	L,
		A		)	(((L) << 8) \| (A))

#define PACK_COLOR_888	(	X,
		Y,
		Z	)	(((X) << 16) \| ((Y) << 8) \| (Z))

#define PACK_COLOR_8888	(	X,
		Y,
		Z,
		W	)	(((X) << 24) \| ((Y) << 16) \| ((Z) << 8) \| (W))

#define PACK_COLOR_8888_REV	(	X,
		Y,
		Z,
		W	)	(((W) << 24) \| ((Z) << 16) \| ((Y) << 8) \| (X))

#define PACK_COLOR_88_REV	(	L,
		A		)	(((A) << 8) \| (L))

#define SHORT_TO_CHAN ( s ) ((s) < 0 ? 0 : (GLchan) ((s) >> 7))

Convert from GLshort to GLchan.

#define UBYTE_TO_CHAN ( b ) (b)

Convert from GLubyte to GLchan.

#define UINT_TO_CHAN ( i ) ((GLchan) ((i) >> 24))

Convert from GLuint to GLchan.

#define UNCLAMPED_FLOAT_TO_CHAN	(	c,
		f		)	UNCLAMPED_FLOAT_TO_UBYTE(c, f)

Convert from GLfloat to GLchan.

#define UNCLAMPED_FLOAT_TO_RGB_CHAN	(	dst,
		f		)

Value:

do {                                            \
   UNCLAMPED_FLOAT_TO_CHAN(dst[0], f[0]);       \
   UNCLAMPED_FLOAT_TO_CHAN(dst[1], f[1]);       \
   UNCLAMPED_FLOAT_TO_CHAN(dst[2], f[2]);       \
} while (0)

Convert 3 channels at once.

Parameters:

	dst	pointer to destination GLchan[3] array.
	f	pointer to source GLfloat[3] array.

See also:: UNCLAMPED_FLOAT_TO_CHAN.

#define UNCLAMPED_FLOAT_TO_RGBA_CHAN	(	dst,
		f		)

Value:

do {                                            \
   UNCLAMPED_FLOAT_TO_CHAN(dst[0], f[0]);       \
   UNCLAMPED_FLOAT_TO_CHAN(dst[1], f[1]);       \
   UNCLAMPED_FLOAT_TO_CHAN(dst[2], f[2]);       \
   UNCLAMPED_FLOAT_TO_CHAN(dst[3], f[3]);       \
} while (0)

Convert 4 channels at once.

Parameters:

	dst	pointer to destination GLchan[4] array.
	f	pointer to source GLfloat[4] array.

See also:: UNCLAMPED_FLOAT_TO_CHAN.

#define USHORT_TO_CHAN ( s ) ((GLchan) ((s) >> 8))

Convert from GLushort to GLchan.

colormac.h File Reference

Detailed Description

Defines

Define Documentation