26 lines
1.0 KiB
Plaintext
26 lines
1.0 KiB
Plaintext
$OpenBSD: patch-src_kernel_qpngio_cpp,v 1.1 2004/09/26 17:23:34 brad Exp $
|
|
--- src/kernel/qpngio.cpp.orig Sun Sep 26 00:31:42 2004
|
|
+++ src/kernel/qpngio.cpp Sun Sep 26 00:33:10 2004
|
|
@@ -110,10 +110,18 @@ void CALLBACK_CALL_TYPE qpiw_flush_fn( p
|
|
static
|
|
void setup_qt( QImage& image, png_structp png_ptr, png_infop info_ptr, float screen_gamma=0.0 )
|
|
{
|
|
- if ( screen_gamma != 0.0 && png_get_valid(png_ptr, info_ptr, PNG_INFO_gAMA) ) {
|
|
+ if ( 0.0 == screen_gamma )
|
|
+ // PNG docs say this is a good guess for a PC monitor
|
|
+ // in a dark room
|
|
+ screen_gamma = 2.2;
|
|
+ if ( png_get_valid(png_ptr, info_ptr, PNG_INFO_gAMA) ) {
|
|
+ // the file has a gAMA attribute
|
|
double file_gamma;
|
|
- png_get_gAMA(png_ptr, info_ptr, &file_gamma);
|
|
- png_set_gamma( png_ptr, screen_gamma, file_gamma );
|
|
+ if ( png_get_gAMA(png_ptr, info_ptr, &file_gamma))
|
|
+ png_set_gamma( png_ptr, screen_gamma, file_gamma );
|
|
+ } else {
|
|
+ // no file gamma, use a reasonable default
|
|
+ png_set_gamma( png_ptr, screen_gamma, 0.45455 );
|
|
}
|
|
|
|
png_uint_32 width;
|