Fix compile error with libpng >= 1.5.0
libpng 1.5.0 changed one of the types in the png_set_iCCP() function prototype.
diff --git a/goo/PNGWriter.cc b/goo/PNGWriter.cc
index d47efa6..f88c3a7 100644
--- a/goo/PNGWriter.cc
+++ b/goo/PNGWriter.cc
@@ -56,6 +56,13 @@
bool PNGWriter::init(FILE *f, int width, int height, int hDPI, int vDPI)
{
+ /* libpng changed the png_set_iCCP() prototype in 1.5.0 */
+#if PNG_LIBPNG_VER < 10500
+ png_charp icc_data_ptr = (png_charp)icc_data;
+#else
+ png_const_bytep icc_data_ptr = (png_const_bytep)icc_data;
+#endif
+
/* initialize stuff */
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) {
@@ -112,7 +119,7 @@
png_set_pHYs(png_ptr, info_ptr, hDPI/0.0254, vDPI/0.0254, PNG_RESOLUTION_METER);
if (icc_data)
- png_set_iCCP(png_ptr, info_ptr, icc_name, PNG_COMPRESSION_TYPE_BASE, (char*)icc_data, icc_data_size);
+ png_set_iCCP(png_ptr, info_ptr, icc_name, PNG_COMPRESSION_TYPE_BASE, icc_data_ptr, icc_data_size);
else if (sRGB_profile)
png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_RELATIVE);
