Revised commentary in example.c
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e38b432846
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10
example.c
10
example.c
@ -244,7 +244,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* file is already open */
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/* If we don't have another value */
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/* If we don't have another value */
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else
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else
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{
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{
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screen_gamma = 2.2; /* A good guess for a PC monitors in a dimly
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screen_gamma = 2.2; /* A good guess for a PC monitor in a dimly
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lit room */
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lit room */
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screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */
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screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */
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}
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}
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@ -681,9 +681,11 @@ void write_png(char *file_name /* , ... other image information ... */)
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#endif
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#endif
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png_set_text(png_ptr, info_ptr, text_ptr, 3);
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png_set_text(png_ptr, info_ptr, text_ptr, 3);
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/* other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs, */
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/* other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs */
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/* note that if sRGB is present the gAMA and cHRM chunks must be ignored
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/* note that if sRGB is present the gAMA and cHRM chunks must be ignored
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* on read and must be written in accordance with the sRGB profile */
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* on read and, if your application chooses to write them, they must
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* be written in accordance with the sRGB profile */
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/* Write the file header information. REQUIRED */
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/* Write the file header information. REQUIRED */
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png_write_info(png_ptr, info_ptr);
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png_write_info(png_ptr, info_ptr);
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@ -779,7 +781,7 @@ void write_png(char *file_name /* , ... other image information ... */)
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#endif no_entire /* use only one output method */
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#endif no_entire /* use only one output method */
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/* You can write optional chunks like tEXt, zTXt, and tIME at the end
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/* You can write optional chunks like tEXt, zTXt, and tIME at the end
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* as well. Shouldn't be necessary in 1.1.0 and up as all the public
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* as well. Shouldn't be necessary in 1.2.0 and up as all the public
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* chunks are supported and you can use png_set_unknown_chunks() to
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* chunks are supported and you can use png_set_unknown_chunks() to
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* register unknown chunks into the info structure to be written out.
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* register unknown chunks into the info structure to be written out.
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*/
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*/
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