#include "mtypes.h"
-/** \def CHAN_TO_UBYTE
- * Convert from GLchan to GLubyte */
-
-/** \def CHAN_TO_FLOAT
- * Convert from GLchan to GLfloat */
-
-/** \def CLAMPED_FLOAT_TO_CHAN
- * Convert from GLclampf to GLchan */
-
-/** \def UNCLAMPED_FLOAT_TO_CHAN
- * Convert from GLfloat to GLchan */
-
-/** \def COPY_CHAN4
- * Copy a GLchan[4] array */
-
-#if CHAN_BITS == 8
-
-#define CHAN_TO_UBYTE(c) (c)
-#define CHAN_TO_USHORT(c) (((c) << 8) | (c))
-#define CHAN_TO_SHORT(c) (((c) << 7) | ((c) >> 1))
-#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)
-
-#elif CHAN_BITS == 16
-
-#define CHAN_TO_UBYTE(c) ((c) >> 8)
-#define CHAN_TO_USHORT(c) (c)
-#define CHAN_TO_SHORT(c) ((c) >> 1)
-#define CHAN_TO_FLOAT(c) ((GLfloat) ((c) * (1.0 / CHAN_MAXF)))
-
-#define CLAMPED_FLOAT_TO_CHAN(c, f) CLAMPED_FLOAT_TO_USHORT(c, f)
-#define UNCLAMPED_FLOAT_TO_CHAN(c, f) UNCLAMPED_FLOAT_TO_USHORT(c, f)
-
-#define COPY_CHAN4(DST, SRC) COPY_4V(DST, SRC)
-
-#elif CHAN_BITS == 32
-
-#define CHAN_TO_UBYTE(c) FLOAT_TO_UBYTE(c)
-#define CHAN_TO_USHORT(c) ((GLushort) (CLAMP((c), 0.0f, 1.0f) * 65535.0))
-#define CHAN_TO_SHORT(c) ((GLshort) (CLAMP((c), 0.0f, 1.0f) * 32767.0))
-#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)
-
-#else
-
-#error unexpected CHAN_BITS size
-
-#endif
-
-
-/**
- * Convert 4 channels at once.
- *
- * \param dst pointer to destination GLchan[4] array.
- * \param f pointer to source GLfloat[4] array.
- *
- * \sa #UNCLAMPED_FLOAT_TO_CHAN.
- */
-#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)
-
-
/**
* Convert four float values in [0,1] to ubytes in [0,255] with clamping.
*/
--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2011 VMware, Inc. 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"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of 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
+ * THE AUTHORS 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.
+ */
+
+/**
+ * Types, macros, etc for the GLchan datatype.
+ * The swrast module is kind of hard-coded for 8bpp color channels but
+ * may be recompiled to use 16- or 32-bit color channels. But that
+ * feature is seldom used and is likely broken in various ways.
+ */
+
+#ifndef U_CHAN_H
+#define U_CHAN_H
+
+
+#include "main/config.h"
+
+
+/**
+ * Color channel data type.
+ */
+#if CHAN_BITS == 8
+ typedef GLubyte GLchan;
+#define CHAN_MAX 255
+#define CHAN_MAXF 255.0F
+#define CHAN_TYPE GL_UNSIGNED_BYTE
+#elif CHAN_BITS == 16
+ typedef GLushort GLchan;
+#define CHAN_MAX 65535
+#define CHAN_MAXF 65535.0F
+#define CHAN_TYPE GL_UNSIGNED_SHORT
+#elif CHAN_BITS == 32
+ typedef GLfloat GLchan;
+#define CHAN_MAX 1.0
+#define CHAN_MAXF 1.0F
+#define CHAN_TYPE GL_FLOAT
+#else
+#error "illegal number of color channel bits"
+#endif
+
+
+#if CHAN_BITS == 8
+
+#define CHAN_TO_UBYTE(c) (c)
+#define CHAN_TO_USHORT(c) (((c) << 8) | (c))
+#define CHAN_TO_SHORT(c) (((c) << 7) | ((c) >> 1))
+#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)
+
+#elif CHAN_BITS == 16
+
+#define CHAN_TO_UBYTE(c) ((c) >> 8)
+#define CHAN_TO_USHORT(c) (c)
+#define CHAN_TO_SHORT(c) ((c) >> 1)
+#define CHAN_TO_FLOAT(c) ((GLfloat) ((c) * (1.0 / CHAN_MAXF)))
+
+#define CLAMPED_FLOAT_TO_CHAN(c, f) CLAMPED_FLOAT_TO_USHORT(c, f)
+#define UNCLAMPED_FLOAT_TO_CHAN(c, f) UNCLAMPED_FLOAT_TO_USHORT(c, f)
+
+#define COPY_CHAN4(DST, SRC) COPY_4V(DST, SRC)
+
+#elif CHAN_BITS == 32
+
+#define CHAN_TO_UBYTE(c) FLOAT_TO_UBYTE(c)
+#define CHAN_TO_USHORT(c) ((GLushort) (CLAMP((c), 0.0f, 1.0f) * 65535.0))
+#define CHAN_TO_SHORT(c) ((GLshort) (CLAMP((c), 0.0f, 1.0f) * 32767.0))
+#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)
+
+#else
+
+#error unexpected CHAN_BITS size
+
+#endif
+
+
+/**
+ * Convert 4 floats to GLchan values.
+ * \param dst pointer to destination GLchan[4] array.
+ * \param f pointer to source GLfloat[4] array.
+ */
+#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 /* U_CHAN_H */
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