[devel] Added named value and 'flag' gamma support to png_set_gamma. Made a
minor change from the previous (unreleased) ABI/API to hide the exact value
used for Macs - it's not a good idea to embed this in the ABI!
diff --git a/pngpriv.h b/pngpriv.h
index d6849c3..dfe0ca2 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -459,6 +459,11 @@
#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
+/* Gamma values (new at libpng-1.5.3): */
+#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */
+#define PNG_GAMMA_MAC_INVERSE 65909
+#define PNG_GAMMA_sRGB_INVERSE 45455
+
/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
#ifdef __cplusplus
