X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fcolormac.h;h=33ca5af0731a4a71e2c97c27b433e799c3d73307;hb=555f67c3d717a52464b517cd6d9874468ab3bd92;hp=0812a51704789174b8b94786e7e7e083e3864da4;hpb=d8aa0269cdadba1608522287bcb3b446c5848c09;p=mesa.git

diff --git a/src/mesa/main/colormac.h b/src/mesa/main/colormac.h
index 0812a517047..33ca5af0731 100644
--- a/src/mesa/main/colormac.h
+++ b/src/mesa/main/colormac.h
@@ -1,10 +1,7 @@
-/* $Id: colormac.h,v 1.9 2001/03/11 18:49:11 gareth 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"),
@@ -19,120 +16,62 @@
  * 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) ((((GLint) (a)) * ((GLint) (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 */