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Merged example.c with libpng-1.2.37beta01

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(from the git master branch)
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Glenn Randers-Pehrson
2009-05-13 07:33:22 -05:00
parent d603c89397
commit 640b7d514d
3 changed files with 15 additions and 10 deletions
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17
example.c
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@@ -2,7 +2,7 @@
#if 0 /* in case someone actually tries to compile this */
/* example.c - an example of using libpng
* Last changed in libpng 1.4.0 [May 3, 2009]
* Last changed in libpng 1.4.0 [May 13, 2009]
* This file has been placed in the public domain by the authors.
* Maintained 1998-2009 Glenn Randers-Pehrson
* Maintained 1996, 1997 Andreas Dilger)
@@ -306,10 +306,10 @@ void read_png(FILE *fp, unsigned int sig_read) /* file is already open */
*/
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT))
{
png_color_8p sig_bit;
png_color_8p sig_bit_p;
png_get_sBIT(png_ptr, info_ptr, &sig_bit);
png_set_shift(png_ptr, sig_bit);
png_get_sBIT(png_ptr, info_ptr, &sig_bit_p);
png_set_shift(png_ptr, sig_bit_p);
}
/* flip the RGB pixels to BGR (or RGBA to BGRA) */
@@ -647,6 +647,7 @@ void write_png(char *file_name /* , ... other image information ... */)
the png structure. */
/* optional significant bit chunk */
png_color_8 sig_bit;
/* if we are dealing with a grayscale image then */
sig_bit.gray = true_bit_depth;
/* otherwise, if we are dealing with a color image then */
@@ -655,7 +656,7 @@ void write_png(char *file_name /* , ... other image information ... */)
sig_bit.blue = true_blue_bit_depth;
/* if the image has an alpha channel then */
sig_bit.alpha = true_alpha_bit_depth;
png_set_sBIT(png_ptr, info_ptr, sig_bit);
png_set_sBIT(png_ptr, info_ptr, &sig_bit);
/* Optional gamma chunk is strongly suggested if you have any guess
@@ -680,9 +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 should 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);