/*
* Mesa 3-D graphics library
- * Version: 7.3
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* 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.
*/
#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.
*/
#define PACK_COLOR_5551( R, G, B, A ) \
((((R) & 0xf8) << 8) | (((G) & 0xf8) << 3) | (((B) & 0xf8) >> 2) | \
- ((A) ? 1 : 0))
+ ((A) >> 7))
#define PACK_COLOR_1555( A, B, G, R ) \
((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) | \
- ((A) ? 0x8000 : 0))
+ (((A) & 0x80) << 8))
#define PACK_COLOR_1555_REV( A, B, G, R ) \
((((B) & 0xf8) >> 1) | (((G) & 0xc0) >> 6) | (((G) & 0x38) << 10) | (((R) & 0xf8) << 5) | \