[qcms] Make half float code self-contained: add halffloat.h

third_party/qcms/src/transform.c

 /* vim: set ts=8 sw=8 noexpandtab: */
 //  qcms
 //  Copyright (C) 2009 Mozilla Corporation
 //  Copyright (C) 1998-2007 Marti Maria
 //
 // 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 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 <stdlib.h>
 #include <math.h>
 #include <assert.h>
 #include <string.h> //memcpy
 #include "qcmsint.h"
 #include "chain.h"
+#include "halffloat.h"
 #include "matrix.h"
 #include "transform_util.h"
 
 /* for MSVC, GCC, Intel, and Sun compilers */
 #if defined(_M_IX86) || defined(__i386__) || defined(__i386) || defined(_M_AMD64) || defined(__x86_64__) || defined(__x86_64)
 #define X86
 #endif /* _M_IX86 || __i386__ || __i386 || _M_AMD64 || __x86_64__ || __x86_64 */
 
 // Build a White point, primary chromas transfer matrix from RGB to CIE XYZ
 // This is just an approximation, I am not handling all the non-linear
@@ skipping 1503 matching lines @@
 
         for (i = 0; i < size; ++i) {
                 *data++ = float_to_half_float(t->output_gamma_lut_r[i] * inverse65535); // r
                 *data++ = float_to_half_float(t->output_gamma_lut_g[i] * inverse65535); // g
                 *data++ = float_to_half_float(t->output_gamma_lut_b[i] * inverse65535); // b
                 *data++ = half_float_one;                                               // a
         }
 
         return size;
 }