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-rw-r--r--src/mesa/main/mtypes.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 37fb9a2408..a8f0edba8b 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -108,7 +108,9 @@ typedef int GLfixed;
/*
* Fixed point arithmetic macros
*/
+#ifndef FIXED_FRAC_BITS
#define FIXED_FRAC_BITS 11
+#endif
#define FIXED_SHIFT FIXED_FRAC_BITS
#define FIXED_ONE (1 << FIXED_SHIFT)
@@ -117,7 +119,9 @@ typedef int GLfixed;
#define FIXED_INT_MASK (~FIXED_FRAC_MASK)
#define FIXED_EPSILON 1
#define FIXED_SCALE ((float) FIXED_ONE)
+#define FIXED_DBL_SCALE ((double) FIXED_ONE)
#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
+#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
#define IntToFixed(I) ((I) << FIXED_SHIFT)
#define FixedToInt(X) ((X) >> FIXED_SHIFT)
#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT)