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Imported from libpng-1.0.5h.tar

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This commit is contained in:
Glenn Randers-Pehrson
1999-12-10 09:43:02 -06:00
parent 074af5e9ca
commit 166c5a397e
62 changed files with 3740 additions and 1045 deletions
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26
contrib/gregbook/rpng-x.c
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@@ -54,18 +54,18 @@
/* #define DEBUG : this enables the Trace() macros */
#include "readpng.h" /* typedefs, common macros, readpng prototypes */
#include "readpng.h" /* typedefs, common macros, readpng prototypes */
/* could just include png.h, but this macro is the only thing we need
* (name and typedefs changed to local versions); note that side effects
* only happen with alpha (which could easily be avoided with
* (name and typedefs changed to local versions); note that side effects
* only happen with alpha (which could easily be avoided with
* "ush acopy = (alpha);") */
#define alpha_composite(composite, fg, alpha, bg) { \
ush temp = ((ush)(fg)*(ush)(alpha) + \
(ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \
(composite) = (uch)((temp + (temp >> 8)) >> 8); \
#define alpha_composite(composite, fg, alpha, bg) { \
ush temp = ((ush)(fg)*(ush)(alpha) + \
(ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \
(composite) = (uch)((temp + (temp >> 8)) >> 8); \
}
@@ -123,9 +123,9 @@ int main(int argc, char **argv)
int rc, alen, flen;
int error = 0;
int have_bg = FALSE;
double LUT_exponent; /* just the lookup table */
double CRT_exponent = 2.2; /* just the monitor */
double default_display_exponent; /* whole display system */
double LUT_exponent; /* just the lookup table */
double CRT_exponent = 2.2; /* just the monitor */
double default_display_exponent; /* whole display system */
XEvent e;
KeySym k;
@@ -222,7 +222,7 @@ int main(int argc, char **argv)
fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename);
++error;
} else {
if ((rc = readpng_init(infile, (long *)(&image_width),
if ((rc = readpng_init(infile, (long *)(&image_width),
(long *)(&image_height))) != 0) {
switch (rc) {
case 1:
@@ -408,11 +408,11 @@ static int rpng_x_create_window()
}
have_colormap = TRUE;
} else if (depth == 16) {
RPixelShift = 15 - rpng_x_msb(RedMask); /* these are right-shifts */
RPixelShift = 15 - rpng_x_msb(RedMask); /* these are right-shifts */
GPixelShift = 15 - rpng_x_msb(GreenMask);
BPixelShift = 15 - rpng_x_msb(BlueMask);
} else /* if (depth > 16) */ {
RPixelShift = rpng_x_msb(RedMask) - 7; /* these are left-shifts */
RPixelShift = rpng_x_msb(RedMask) - 7; /* these are left-shifts */
GPixelShift = rpng_x_msb(GreenMask) - 7;
BPixelShift = rpng_x_msb(BlueMask) - 7;
}