-/* $Id: colormac.h,v 1.10 2001/07/16 15:54:23 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2008 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"),
* 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
-
-/*
+/**
+ * \file colormac.h
* Color-related macros
*/
+
#ifndef COLORMAC_H
#define COLORMAC_H
-#include "glheader.h"
#include "config.h"
#include "macros.h"
-#include "mmath.h"
-/* Do not reference mtypes.h from this file.
- */
-
-
-#if CHAN_BITS == 8
-
-#define BYTE_TO_CHAN(b) ((b) < 0 ? 0 : (GLchan) (b))
-#define UBYTE_TO_CHAN(b) (b)
-#define SHORT_TO_CHAN(s) ((s) < 0 ? 0 : (GLchan) ((s) >> 7))
-#define USHORT_TO_CHAN(s) ((GLchan) ((s) >> 8))
-#define INT_TO_CHAN(i) ((i) < 0 ? 0 : (GLchan) ((i) >> 23))
-#define UINT_TO_CHAN(i) ((GLchan) ((i) >> 24))
-
-#define CHAN_TO_UBYTE(c) (c)
-#define CHAN_TO_FLOAT(c) UBYTE_TO_FLOAT(c)
-
-#define CLAMPED_FLOAT_TO_CHAN(c, f) CLAMPED_FLOAT_TO_UBYTE(c, f)
-#define UNCLAMPED_FLOAT_TO_CHAN(c, f) UNCLAMPED_FLOAT_TO_UBYTE(c, f)
-
-#define COPY_CHAN4(DST, SRC) COPY_4UBV(DST, SRC)
-
-#define CHAN_PRODUCT(a, b) ((GLubyte) (((GLint)(a) * ((GLint)(b) + 1)) >> 8))
-
-
-#elif CHAN_BITS == 16
-
-#define BYTE_TO_CHAN(b) ((b) < 0 ? 0 : (((GLchan) (b)) * 516))
-#define UBYTE_TO_CHAN(b) ((((GLchan) (b)) << 8) | ((GLchan) (b)))
-#define SHORT_TO_CHAN(s) ((s) < 0 ? 0 : (GLchan) (s))
-#define USHORT_TO_CHAN(s) (s)
-#define INT_TO_CHAN(i) ((i) < 0 ? 0 : (GLchan) ((i) >> 15))
-#define UINT_TO_CHAN(i) ((GLchan) ((i) >> 16))
+#include "mtypes.h"
-#define CHAN_TO_UBYTE(c) ((c) >> 8)
-#define CHAN_TO_FLOAT(c) ((GLfloat) ((c) * (1.0 / CHAN_MAXF)))
-#define CLAMPED_FLOAT_TO_CHAN(c, f) \
- c = ((GLchan) IROUND((f) * CHAN_MAXF))
-#define UNCLAMPED_FLOAT_TO_CHAN(c, f) \
- c = ( (GLchan) IROUND( CLAMP(f, 0.0, 1.0) * CHAN_MAXF) )
-
-#define COPY_CHAN4(DST, SRC) COPY_4V(DST, SRC)
-
-#define CHAN_PRODUCT(a, b) ((GLchan) ((((GLuint) (a)) * ((GLuint) (b))) / 65535))
-
-
-#elif CHAN_BITS == 32
-
-/* XXX floating-point color channels not fully thought-out */
-#define BYTE_TO_CHAN(b) ((GLfloat) ((b) * (1.0F / 127.0F)))
-#define UBYTE_TO_CHAN(b) ((GLfloat) ((b) * (1.0F / 255.0F)))
-#define SHORT_TO_CHAN(s) ((GLfloat) ((s) * (1.0F / 32767.0F)))
-#define USHORT_TO_CHAN(s) ((GLfloat) ((s) * (1.0F / 65535.0F)))
-#define INT_TO_CHAN(i) ((GLfloat) ((i) * (1.0F / 2147483647.0F)))
-#define UINT_TO_CHAN(i) ((GLfloat) ((i) * (1.0F / 4294967295.0F)))
-
-#define CHAN_TO_UBYTE(c) FLOAT_TO_UBYTE(c)
-#define CHAN_TO_FLOAT(c) (c)
-
-#define CLAMPED_FLOAT_TO_CHAN(c, f) c = (f)
-#define UNCLAMPED_FLOAT_TO_CHAN(c, f) c = (f)
-
-#define COPY_CHAN4(DST, SRC) COPY_4V(DST, SRC)
+/**
+ * Convert four float values in [0,1] to ubytes in [0,255] with clamping.
+ */
+static inline void
+_mesa_unclamped_float_rgba_to_ubyte(GLubyte dst[4], const GLfloat src[4])
+{
+ int i;
+ for (i = 0; i < 4; i++)
+ UNCLAMPED_FLOAT_TO_UBYTE(dst[i], src[i]);
+}
-#define CHAN_PRODUCT(a, b) ((a) * (b))
-#else
+/**
+ * \name Generic color packing macros. All inputs should be GLubytes.
+ */
+/*@{*/
-#error unexpected CHAN_BITS size
+#define PACK_COLOR_8888( X, Y, Z, W ) \
+ (((X) << 24) | ((Y) << 16) | ((Z) << 8) | (W))
-#endif
+#define PACK_COLOR_565( X, Y, Z ) \
+ ((((X) & 0xf8) << 8) | (((Y) & 0xfc) << 3) | (((Z) & 0xf8) >> 3))
+#define PACK_COLOR_1555( A, B, G, R ) \
+ ((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) | \
+ (((A) & 0x80) << 8))
+#define PACK_COLOR_4444( R, G, B, A ) \
+ ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4))
-/*
- * Convert 3 channels at once.
- */
-#define UNCLAMPED_FLOAT_TO_RGB_CHAN(dst, f) \
-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)
+#define PACK_COLOR_88( L, A ) \
+ (((L) << 8) | (A))
-
-/*
- * Convert 4 channels at once.
- */
-#define UNCLAMPED_FLOAT_TO_RGBA_CHAN(dst, f) \
-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)
+/*@}*/
#endif /* COLORMAC_H */