minecraft-pi-reborn/libpng
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Revised commentary in example.c

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This commit is contained in:
Glenn Randers-Pehrson 2009-05-13 07:42:05 -05:00
parent e38b432846
commit 1296329f02
1 changed files with 6 additions and 4 deletions
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10
example.c
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@ -244,7 +244,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* file is already open */
/* If we don't have another value */ /* If we don't have another value */
else 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 */ lit room */
screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */ 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 #endif
png_set_text(png_ptr, info_ptr, text_ptr, 3); 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 /* 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 */ /* Write the file header information. REQUIRED */
png_write_info(png_ptr, info_ptr); 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 */ #endif no_entire /* use only one output method */
/* You can write optional chunks like tEXt, zTXt, and tIME at the end /* 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 * chunks are supported and you can use png_set_unknown_chunks() to
* register unknown chunks into the info structure to be written out. * register unknown chunks into the info structure to be written out.
*/ */