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colormac.h File Reference

Color-related macros. More...

#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. More...
#define	UBYTE_TO_CHAN(b)   (b)
	Convert from GLubyte to GLchan. More...
#define	SHORT_TO_CHAN(s)   ((s) < 0 ? 0 : (GLchan) ((s) >> 7))
	Convert from GLshort to GLchan. More...
#define	USHORT_TO_CHAN(s)   ((GLchan) ((s) >> 8))
	Convert from GLushort to GLchan. More...
#define	INT_TO_CHAN(i)   ((i) < 0 ? 0 : (GLchan) ((i) >> 23))
	Convert from GLint to GLchan. More...
#define	UINT_TO_CHAN(i)   ((GLchan) ((i) >> 24))
	Convert from GLuint to GLchan. More...
#define	CHAN_TO_UBYTE(c)   (c)
	Convert from GLchan to GLubyte. More...
#define	CHAN_TO_FLOAT(c)   UBYTE_TO_FLOAT(c)
	Convert from GLchan to GLfloat. More...
#define	CLAMPED_FLOAT_TO_CHAN(c, f)   CLAMPED_FLOAT_TO_UBYTE(c, f)
	Convert from GLclampf to GLchan. More...
#define	UNCLAMPED_FLOAT_TO_CHAN(c, f)   UNCLAMPED_FLOAT_TO_UBYTE(c, f)
	Convert from GLfloat to GLchan. More...
#define	COPY_CHAN4(DST, SRC)   COPY_4UBV(DST, SRC)
	Copy a GLchan[4] array. More...
#define	CHAN_PRODUCT(a, b)   ((GLubyte) (((GLint)(a) * ((GLint)(b) + 1)) >> 8))
	Scaled product (usually approximated) between two GLchan arguments. More...
#define	UNCLAMPED_FLOAT_TO_RGB_CHAN(dst, f)
	Convert 3 channels at once. More...
#define	UNCLAMPED_FLOAT_TO_RGBA_CHAN(dst, f)
	Convert 4 channels at once. More...
#define	PACK_COLOR_8888(R, G, B, A)   (((R) << 24) | ((G) << 16) | ((B) << 8) | (A))
#define	PACK_COLOR_888(R, G, B)   (((R) << 16) | ((G) << 8) | (B))
#define	PACK_COLOR_565(R, G, B)   ((((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | (((B) & 0xf8) >> 3))
#define	PACK_COLOR_1555(A, B, G, R)
#define	PACK_COLOR_5551(R, G, B, A)
#define	PACK_COLOR_4444(R, G, B, A)   ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4))
#define	PACK_COLOR_88(L, A)   (((L) << 8) | (A))
#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))

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Detailed Description

Color-related macros.

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Define Documentation

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

Convert from GLbyte to GLchan.

#define CHAN_PRODUCT (  a, b    )     ((GLubyte) (((GLint)(a) * ((GLint)(b) + 1)) >> 8))

Scaled product (usually approximated) between two GLchan arguments.

#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_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_5551 (  R, G, B, A    )

Value: ((((B) & 0xf8) << 8) | \ (((G) & 0xf8) << 3) | \ (((R) & 0xf8) >> 2) | \ (((A) & 0x80) >> 7))

#define PACK_COLOR_565 (  R, G, B    )     ((((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | (((B) & 0xf8) >> 3))

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

#define PACK_COLOR_888 (  R, G, B    )     (((R) << 16) | ((G) << 8) | (B))

#define PACK_COLOR_8888 (  R, G, B, A    )     (((R) << 24) | ((G) << 16) | ((B) << 8) | (A))

#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.

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