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author | Glenn Randers-Pehrson <glennrp@shaggy.simplesystems.org> | 2009-05-13 07:42:05 -0500 |
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committer | Glenn Randers-Pehrson <glennrp@shaggy.simplesystems.org> | 2009-05-13 07:42:05 -0500 |
commit | 1296329f028ca9aa5fb2e504d9db8b06804b49b1 (patch) | |
tree | f941ce1fcaf506eba46b8ae0166dedc0c10b0745 /example.c | |
parent | e38b432846ab971aae1e367bae23c761be491f43 (diff) | |
download | libpng-1296329f028ca9aa5fb2e504d9db8b06804b49b1.tar.gz |
Revised commentary in example.c
Diffstat (limited to 'example.c')
-rw-r--r-- | example.c | 10 |
1 files changed, 6 insertions, 4 deletions
@@ -244,7 +244,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* file is already open */ /* If we don't have another value */ else { - screen_gamma = 2.2; /* A good guess for a PC monitors in a dimly + screen_gamma = 2.2; /* A good guess for a PC monitor in a dimly lit room */ screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */ } @@ -681,9 +681,11 @@ void write_png(char *file_name /* , ... other image information ... */) #endif png_set_text(png_ptr, info_ptr, text_ptr, 3); - /* other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs, */ + /* other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs */ + /* note that if sRGB is present the gAMA and cHRM chunks must be ignored - * on read and must be written in accordance with the sRGB profile */ + * on read and, if your application chooses to write them, they must + * be written in accordance with the sRGB profile */ /* Write the file header information. REQUIRED */ png_write_info(png_ptr, info_ptr); @@ -779,7 +781,7 @@ void write_png(char *file_name /* , ... other image information ... */) #endif no_entire /* use only one output method */ /* You can write optional chunks like tEXt, zTXt, and tIME at the end - * as well. Shouldn't be necessary in 1.1.0 and up as all the public + * as well. Shouldn't be necessary in 1.2.0 and up as all the public * chunks are supported and you can use png_set_unknown_chunks() to * register unknown chunks into the info structure to be written out. */ |