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-rw-r--r--third_party/mesa/MesaLib/src/mesa/main/macros.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/third_party/mesa/MesaLib/src/mesa/main/macros.h b/third_party/mesa/MesaLib/src/mesa/main/macros.h
index b2ec0ba..ee07011 100644
--- a/third_party/mesa/MesaLib/src/mesa/main/macros.h
+++ b/third_party/mesa/MesaLib/src/mesa/main/macros.h
@@ -134,7 +134,13 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256];
*** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
*** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
***/
-#if defined(USE_IEEE) && !defined(DEBUG)
+/* (ernstm): Disabled the IEEE float optimized
+ * UNCLAMPED_FLOAT_TO_UBYTE and CLAMPED_FLOAT_TO_UBYTE in
+ * chromium version of mesa. They produce slightly
+ * different results than the un-optimized versions that are
+ * used when DEBUG is defined.
+ */
+#if 0 && defined(USE_IEEE) && !defined(DEBUG)
#define IEEE_0996 0x3f7f0000 /* 0.996 or so */
/* This function/macro is sensitive to precision. Test very carefully
* if you change it!