mirror of
https://git.code.sf.net/p/libpng/code.git
synced 2025-07-10 18:04:09 +02:00
[libpng14] Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7+
Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c
because usleep() is deprecated (port from libpng16).
Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c
Fixed uninitialized variable in contrib/gregbook/rpng2-x.c
This commit is contained in:
Glenn Randers-Pehrson
@@ -41,10 +41,12 @@
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unexpected-EOF and file-read-error cases; fixed Trace() cut-and-
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paste bugs
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- 2.03: deleted runtime MMX-enabling/disabling and obsolete -mmx* options
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- 2.04: Added "void(foo);" statements to quiet pedantic compiler warnings
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about unused variables (GR-P)
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- 2.05: Use nanosleep() instead of usleep(), which is deprecated (GR-P).
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---------------------------------------------------------------------------
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Copyright (c) 1998-2008 Greg Roelofs. All rights reserved.
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Copyright (c) 1998-2010, 2014-2015 Greg Roelofs. All rights reserved.
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This software is provided "as is," without warranty of any kind,
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express or implied. In no event shall the author or contributors
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@@ -95,9 +97,9 @@
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#define PROGNAME "rpng2-x"
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#define LONGNAME "Progressive PNG Viewer for X"
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#define VERSION "2.03 of 25 February 2010"
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#define RESNAME "rpng2" /* our X resource application name */
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#define RESCLASS "Rpng" /* our X resource class name */
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#define VERSION "2.04 of 15 June 2014"
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#define RESNAME "rpng2" /* our X resource application name */
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#define RESCLASS "Rpng" /* our X resource class name */
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#include <stdio.h>
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#include <stdlib.h>
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@@ -111,6 +113,19 @@
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#include <X11/Xos.h>
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#include <X11/keysym.h> /* defines XK_* macros */
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#if _POSIX_C_SOURCE >= 199309L /* have nanosleep() */
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# undef usleep
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# define usleep(usec) { \
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struct timespec ts; \
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ts.tv_sec = 0; \
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ts.tv_nsec = (usec) * 1000; \
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nanosleep(&ts, NULL); }
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# endif
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#ifndef usleep /* have neither nanosleep() nor usleep() */
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# define usleep(x) sleep(((x)+499999)/1000000)
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#endif
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#ifdef VMS
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# include <unistd.h>
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#endif
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@@ -132,7 +147,7 @@
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(e.type == KeyPress && /* v--- or 1 for shifted keys */ \
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((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape)))
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#define NO_24BIT_MASKS /* undef case not fully written--only for redisplay() */
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#define NO_24BIT_MASKS /* undef case not fully written--only for redisplay() */
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#define rgb1_max bg_freq
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#define rgb1_min bg_gray
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@@ -302,7 +317,7 @@ int main(int argc, char **argv)
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int have_bg = FALSE;
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#ifdef FEATURE_LOOP
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int loop = FALSE;
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long loop_interval = -1; /* seconds (100,000 max) */
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long loop_interval = -1; /* seconds (100,000 max) */
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#endif
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double LUT_exponent; /* just the lookup table */
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double CRT_exponent = 2.2; /* just the monitor */
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@@ -456,43 +471,47 @@ int main(int argc, char **argv)
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fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname);
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readpng2_version_info();
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fprintf(stderr, "\n"
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"Usage: %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
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"Usage: ");
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fprintf(stderr,
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"%s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
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" %*s [-usleep dur | -timing] [-pause]\n",
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PROGNAME, (int)strlen(PROGNAME), " ");
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fprintf(stderr,
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#ifdef FEATURE_LOOP
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" %*s [-usleep dur | -timing] [-pause] [-loop [sec]] file.png\n\n"
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#else
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" %*s [-usleep dur | -timing] [-pause] file.png\n\n"
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" [-loop [sec]]"
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#endif
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" file.png\n\n");
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fprintf(stderr,
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" xdpy\tname of the target X display (e.g., ``hostname:0'')\n"
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" exp \ttransfer-function exponent (``gamma'') of the display\n"
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"\t\t system in floating-point format (e.g., ``%.1f''); equal\n"
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"\t\t to the product of the lookup-table exponent (varies)\n"
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"\t\t to the product of the lookup-table exponent (varies)\n",
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default_display_exponent);
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fprintf(stderr,
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"\t\t and the CRT exponent (usually 2.2); must be positive\n"
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" bg \tdesired background color in 7-character hex RGB format\n"
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"\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n"
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"\t\t used with transparent images; overrides -bgpat\n"
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" pat \tdesired background pattern number (0-%d); used with\n"
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"\t\t transparent images; overrides -bgcolor\n"
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"\t\t transparent images; overrides -bgcolor\n",
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num_bgpat-1);
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#ifdef FEATURE_LOOP
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fprintf(stderr,
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" -loop\tloops through background images after initial display\n"
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"\t\t is complete (depends on -bgpat)\n"
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" sec \tseconds to display each background image (default = 2)\n"
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" sec \tseconds to display each background image (default = 2)\n");
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#endif
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fprintf(stderr,
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" dur \tduration in microseconds to wait after displaying each\n"
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"\t\t row (for demo purposes)\n"
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" -timing\tenables delay for every block read, to simulate modem\n"
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"\t\t download of image (~36 Kbps)\n"
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" -pause\tpauses after displaying each pass until mouse clicked\n"
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"\nPress Q, Esc or mouse button 1 (within image window, after image\n"
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"is displayed) to quit.\n"
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"\n", PROGNAME,
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#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
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(int)strlen(PROGNAME), " ",
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#endif
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(int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat-1);
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"is displayed) to quit.\n");
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exit(1);
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}
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if (!(infile = fopen(filename, "rb"))) {
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fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename);
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++error;
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@@ -594,7 +613,7 @@ int main(int argc, char **argv)
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"(unexpectedly) while reading PNG image file\n");
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exit(3);
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} else /* if (error) */ {
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// will print error message below
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/* will print error message below */
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}
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break;
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}
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@@ -738,6 +757,8 @@ int main(int argc, char **argv)
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Trace((stderr, "about to call rpng2_x_cleanup()\n"))
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rpng2_x_cleanup();
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(void)argc; /* Unused */
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return 0;
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}
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@@ -784,8 +805,9 @@ static void rpng2_x_init(void)
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if (rpng2_x_create_window()) {
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/* GRR TEMPORARY HACK: this is fundamentally no different from cases
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* above; libpng should longjmp() back to us when png_ptr goes away.
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* If we/it segfault instead, seems like a libpng bug... */
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* above; libpng should call our error handler to longjmp() back to us
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* when png_ptr goes away. If we/it segfault instead, seems like a
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* libpng bug... */
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/* we're here via libpng callback, so if window fails, clean and bail */
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readpng2_cleanup(&rpng2_info);
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@@ -1279,7 +1301,7 @@ static int rpng2_x_load_bg_image(void)
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for (row = 0; row < rpng2_info.height; ++row) {
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src = bg_data + row*bg_rowbytes;
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dest = ximage->data + row*ximage_rowbytes;
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if (bpp == 32) { /* slightly optimized version */
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if (bpp == 32) { /* slightly optimized version */
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for (i = rpng2_info.width; i > 0; --i) {
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red = *src++;
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green = *src++;
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@@ -1828,6 +1850,9 @@ static void rpng2_x_redisplay_image(ulg startcol, ulg startrow,
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XFlush(display);
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}
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(void)startcol;
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(void)width;
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} /* end function rpng2_x_redisplay_image() */
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@@ -7,7 +7,7 @@ LD=$(CC)
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RM=rm -f
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP \
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -DZ_SOLO \
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-DdeflateParams\(a,b,c\)=Z_OK -I. -O1
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C=.c
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@@ -7,7 +7,7 @@ LD=$(CC)
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RM=rm -f
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -DZ_SOLO -I. -O1
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C=.c
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O=.o
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@@ -23,7 +23,7 @@ XLIB = -L/usr/X11R6/lib -lX11
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#LIBS = $(XLIB)
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LIBS = $(XLIB) -lm #platforms that need libm
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP \
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CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -DZ_SOLO \
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-DdeflateParams\(a,b,c\)=Z_OK -I. $(XINC) -O1
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C=.c
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@@ -3,6 +3,7 @@
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* copyright (C) 1999 by Willem van Schaik <willem@schaik.com>
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*
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* version 1.0 - 1999.10.15 - First version.
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* version 1.1 - 2015.07.29 - Fixed leaks (Glenn Randers-Pehrson)
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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@@ -18,6 +19,7 @@
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#include <mem.h>
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#include <fcntl.h>
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#endif
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#include <zlib.h>
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#ifndef BOOL
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#define BOOL unsigned char
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@@ -49,7 +51,8 @@
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int main (int argc, char *argv[]);
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void usage ();
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BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha);
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BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
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BOOL alpha);
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void get_token(FILE *pnm_file, char *token);
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png_uint_32 get_data (FILE *pnm_file, int depth);
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png_uint_32 get_value (FILE *pnm_file, int depth);
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@@ -175,7 +178,8 @@ void usage()
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fprintf (stderr, " or: ... | pnm2png [options]\n");
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fprintf (stderr, "Options:\n");
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fprintf (stderr, " -i[nterlace] write png-file with interlacing on\n");
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fprintf (stderr, " -a[lpha] <file>.pgm read PNG alpha channel as pgm-file\n");
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fprintf (stderr,
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" -a[lpha] <file>.pgm read PNG alpha channel as pgm-file\n");
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fprintf (stderr, " -h | -? print this help-information\n");
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}
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@@ -183,29 +187,36 @@ void usage()
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* pnm2png
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*/
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BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha)
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BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
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BOOL alpha)
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{
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png_struct *png_ptr = NULL;
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png_info *info_ptr = NULL;
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png_byte *png_pixels = NULL;
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png_byte **row_pointers = NULL;
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png_byte *pix_ptr = NULL;
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png_uint_32 row_bytes;
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volatile png_uint_32 row_bytes;
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char type_token[16];
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char width_token[16];
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char height_token[16];
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char maxval_token[16];
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int color_type;
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png_uint_32 width, alpha_width;
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png_uint_32 height, alpha_height;
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volatile int color_type=1;
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unsigned long ul_width=0, ul_alpha_width=0;
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unsigned long ul_height=0, ul_alpha_height=0;
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unsigned long ul_maxval=0;
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volatile png_uint_32 width=0, height=0;
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volatile png_uint_32 alpha_width=0, alpha_height=0;
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png_uint_32 maxval;
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int bit_depth = 0;
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int channels;
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volatile int bit_depth = 0;
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int channels=0;
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int alpha_depth = 0;
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int alpha_present;
|
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int alpha_present=0;
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int row, col;
|
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BOOL raw, alpha_raw = FALSE;
|
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#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
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BOOL packed_bitmap = FALSE;
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#endif
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png_uint_32 tmp16;
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int i;
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|
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@@ -218,20 +229,36 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
|
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}
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else if ((type_token[1] == '1') || (type_token[1] == '4'))
|
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{
|
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#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
|
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raw = (type_token[1] == '4');
|
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color_type = PNG_COLOR_TYPE_GRAY;
|
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get_token(pnm_file, width_token);
|
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sscanf (width_token, "%lu", &ul_width);
|
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width = (png_uint_32) ul_width;
|
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get_token(pnm_file, height_token);
|
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sscanf (height_token, "%lu", &ul_height);
|
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height = (png_uint_32) ul_height;
|
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bit_depth = 1;
|
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packed_bitmap = TRUE;
|
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#else
|
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fprintf (stderr, "PNM2PNG built without PNG_WRITE_INVERT_SUPPORTED and \n");
|
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fprintf (stderr, "PNG_WRITE_PACK_SUPPORTED can't read PBM (P1,P4) files\n");
|
||||
#endif
|
||||
}
|
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else if ((type_token[1] == '2') || (type_token[1] == '5'))
|
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{
|
||||
raw = (type_token[1] == '5');
|
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color_type = PNG_COLOR_TYPE_GRAY;
|
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get_token(pnm_file, width_token);
|
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sscanf (width_token, "%lu", &width);
|
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sscanf (width_token, "%lu", &ul_width);
|
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width = (png_uint_32) ul_width;
|
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get_token(pnm_file, height_token);
|
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sscanf (height_token, "%lu", &height);
|
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sscanf (height_token, "%lu", &ul_height);
|
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height = (png_uint_32) ul_height;
|
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get_token(pnm_file, maxval_token);
|
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sscanf (maxval_token, "%lu", &maxval);
|
||||
sscanf (maxval_token, "%lu", &ul_maxval);
|
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maxval = (png_uint_32) ul_maxval;
|
||||
|
||||
if (maxval <= 1)
|
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bit_depth = 1;
|
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else if (maxval <= 3)
|
||||
@@ -248,11 +275,14 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
|
||||
raw = (type_token[1] == '6');
|
||||
color_type = PNG_COLOR_TYPE_RGB;
|
||||
get_token(pnm_file, width_token);
|
||||
sscanf (width_token, "%lu", &width);
|
||||
sscanf (width_token, "%lu", &ul_width);
|
||||
width = (png_uint_32) ul_width;
|
||||
get_token(pnm_file, height_token);
|
||||
sscanf (height_token, "%lu", &height);
|
||||
sscanf (height_token, "%lu", &ul_height);
|
||||
height = (png_uint_32) ul_height;
|
||||
get_token(pnm_file, maxval_token);
|
||||
sscanf (maxval_token, "%lu", &maxval);
|
||||
sscanf (maxval_token, "%lu", &ul_maxval);
|
||||
maxval = (png_uint_32) ul_maxval;
|
||||
if (maxval <= 1)
|
||||
bit_depth = 1;
|
||||
else if (maxval <= 3)
|
||||
@@ -287,15 +317,18 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
|
||||
{
|
||||
alpha_raw = (type_token[1] == '5');
|
||||
get_token(alpha_file, width_token);
|
||||
sscanf (width_token, "%lu", &alpha_width);
|
||||
sscanf (width_token, "%lu", &ul_alpha_width);
|
||||
alpha_width=(png_uint_32) ul_alpha_width;
|
||||
if (alpha_width != width)
|
||||
return FALSE;
|
||||
get_token(alpha_file, height_token);
|
||||
sscanf (height_token, "%lu", &alpha_height);
|
||||
sscanf (height_token, "%lu", &ul_alpha_height);
|
||||
alpha_height = (png_uint_32) ul_alpha_height;
|
||||
if (alpha_height != height)
|
||||
return FALSE;
|
||||
get_token(alpha_file, maxval_token);
|
||||
sscanf (maxval_token, "%lu", &maxval);
|
||||
sscanf (maxval_token, "%lu", &ul_maxval);
|
||||
maxval = (png_uint_32) ul_maxval;
|
||||
if (maxval <= 1)
|
||||
alpha_depth = 1;
|
||||
else if (maxval <= 3)
|
||||
@@ -324,76 +357,108 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
|
||||
channels = 3;
|
||||
else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
channels = 4;
|
||||
#if 0
|
||||
else
|
||||
channels = 0; /* should not happen */
|
||||
channels = 0; /* cannot happen */
|
||||
#endif
|
||||
|
||||
alpha_present = (channels - 1) % 2;
|
||||
|
||||
/* row_bytes is the width x number of channels x (bit-depth / 8) */
|
||||
row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2);
|
||||
#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
if (packed_bitmap)
|
||||
/* row data is as many bytes as can fit width x channels x bit_depth */
|
||||
row_bytes = (width * channels * bit_depth + 7) / 8;
|
||||
else
|
||||
#endif
|
||||
/* row_bytes is the width x number of channels x (bit-depth / 8) */
|
||||
row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2);
|
||||
|
||||
if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL)
|
||||
if ((png_pixels = (png_byte *)
|
||||
malloc (row_bytes * height * sizeof (png_byte))) == NULL)
|
||||
return FALSE;
|
||||
|
||||
/* read data from PNM file */
|
||||
pix_ptr = png_pixels;
|
||||
|
||||
for (row = 0; row < height; row++)
|
||||
for (row = 0; row < (int) height; row++)
|
||||
{
|
||||
for (col = 0; col < width; col++)
|
||||
#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
if (packed_bitmap) {
|
||||
for (i = 0; i < (int) row_bytes; i++)
|
||||
/* png supports this format natively so no conversion is needed */
|
||||
*pix_ptr++ = get_data (pnm_file, 8);
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
for (i = 0; i < (channels - alpha_present); i++)
|
||||
for (col = 0; col < (int) width; col++)
|
||||
{
|
||||
if (raw)
|
||||
*pix_ptr++ = get_data (pnm_file, bit_depth);
|
||||
else
|
||||
if (bit_depth <= 8)
|
||||
*pix_ptr++ = get_value (pnm_file, bit_depth);
|
||||
for (i = 0; i < (channels - alpha_present); i++)
|
||||
{
|
||||
if (raw)
|
||||
*pix_ptr++ = get_data (pnm_file, bit_depth);
|
||||
else
|
||||
{
|
||||
tmp16 = get_value (pnm_file, bit_depth);
|
||||
*pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF);
|
||||
pix_ptr++;
|
||||
*pix_ptr = (png_byte) (tmp16 & 0xFF);
|
||||
pix_ptr++;
|
||||
}
|
||||
}
|
||||
if (bit_depth <= 8)
|
||||
*pix_ptr++ = get_value (pnm_file, bit_depth);
|
||||
else
|
||||
{
|
||||
tmp16 = get_value (pnm_file, bit_depth);
|
||||
*pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF);
|
||||
pix_ptr++;
|
||||
*pix_ptr = (png_byte) (tmp16 & 0xFF);
|
||||
pix_ptr++;
|
||||
}
|
||||
}
|
||||
|
||||
if (alpha) /* read alpha-channel from pgm file */
|
||||
{
|
||||
if (alpha_raw)
|
||||
*pix_ptr++ = get_data (alpha_file, alpha_depth);
|
||||
else
|
||||
if (alpha_depth <= 8)
|
||||
*pix_ptr++ = get_value (alpha_file, bit_depth);
|
||||
if (alpha) /* read alpha-channel from pgm file */
|
||||
{
|
||||
if (alpha_raw)
|
||||
*pix_ptr++ = get_data (alpha_file, alpha_depth);
|
||||
else
|
||||
{
|
||||
tmp16 = get_value (alpha_file, bit_depth);
|
||||
*pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF);
|
||||
*pix_ptr++ = (png_byte) (tmp16 & 0xFF);
|
||||
}
|
||||
} /* if alpha */
|
||||
|
||||
if (alpha_depth <= 8)
|
||||
*pix_ptr++ = get_value (alpha_file, bit_depth);
|
||||
else
|
||||
{
|
||||
tmp16 = get_value (alpha_file, bit_depth);
|
||||
*pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF);
|
||||
*pix_ptr++ = (png_byte) (tmp16 & 0xFF);
|
||||
}
|
||||
} /* if alpha */
|
||||
} /* if packed_bitmap */
|
||||
} /* end for col */
|
||||
} /* end for row */
|
||||
|
||||
/* prepare the standard PNG structures */
|
||||
png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
||||
png_ptr = png_create_write_struct (png_get_libpng_ver(NULL), NULL, NULL,
|
||||
NULL);
|
||||
if (!png_ptr)
|
||||
{
|
||||
free (png_pixels);
|
||||
png_pixels = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
info_ptr = png_create_info_struct (png_ptr);
|
||||
if (!info_ptr)
|
||||
{
|
||||
png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
|
||||
free (png_pixels);
|
||||
png_pixels = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
if (packed_bitmap == TRUE)
|
||||
{
|
||||
png_set_packing (png_ptr);
|
||||
png_set_invert_mono (png_ptr);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* setjmp() must be called in every function that calls a PNG-reading libpng function */
|
||||
if (setjmp (png_jmpbuf(png_ptr)))
|
||||
{
|
||||
png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
|
||||
png_destroy_write_struct (&png_ptr, &info_ptr);
|
||||
free (png_pixels);
|
||||
png_pixels = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
@@ -411,25 +476,28 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
|
||||
/* if needed we will allocate memory for an new array of row-pointers */
|
||||
if (row_pointers == (unsigned char**) NULL)
|
||||
{
|
||||
if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL)
|
||||
if ((row_pointers = (png_byte **)
|
||||
malloc (height * sizeof (png_bytep))) == NULL)
|
||||
{
|
||||
png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
|
||||
png_destroy_write_struct (&png_ptr, &info_ptr);
|
||||
free (png_pixels);
|
||||
png_pixels = NULL;
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
/* set the individual row_pointers to point at the correct offsets */
|
||||
for (i = 0; i < (height); i++)
|
||||
for (i = 0; i < (int) height; i++)
|
||||
row_pointers[i] = png_pixels + i * row_bytes;
|
||||
|
||||
/* write out the entire image data in one call */
|
||||
png_write_image (png_ptr, row_pointers);
|
||||
|
||||
/* write the additional chuncks to the PNG file (not really needed) */
|
||||
/* write the additional chunks to the PNG file (not really needed) */
|
||||
png_write_end (png_ptr, info_ptr);
|
||||
|
||||
/* clean up after the write, and free any memory allocated */
|
||||
png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
|
||||
png_destroy_write_struct (&png_ptr, &info_ptr);
|
||||
|
||||
if (row_pointers != (unsigned char**) NULL)
|
||||
free (row_pointers);
|
||||
@@ -446,19 +514,32 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
|
||||
void get_token(FILE *pnm_file, char *token)
|
||||
{
|
||||
int i = 0;
|
||||
int ret;
|
||||
|
||||
/* remove white-space */
|
||||
/* remove white-space and comment lines */
|
||||
do
|
||||
{
|
||||
token[i] = (unsigned char) fgetc (pnm_file);
|
||||
ret = fgetc(pnm_file);
|
||||
if (ret == '#') {
|
||||
/* the rest of this line is a comment */
|
||||
do
|
||||
{
|
||||
ret = fgetc(pnm_file);
|
||||
}
|
||||
while ((ret != '\n') && (ret != '\r') && (ret != EOF));
|
||||
}
|
||||
if (ret == EOF) break;
|
||||
token[i] = (unsigned char) ret;
|
||||
}
|
||||
while ((token[i] == '\n') || (token[i] == '\r') || (token[i] == ' '));
|
||||
|
||||
/* read string */
|
||||
do
|
||||
{
|
||||
ret = fgetc(pnm_file);
|
||||
if (ret == EOF) break;
|
||||
i++;
|
||||
token[i] = (unsigned char) fgetc (pnm_file);
|
||||
token[i] = (unsigned char) ret;
|
||||
}
|
||||
while ((token[i] != '\n') && (token[i] != '\r') && (token[i] != ' '));
|
||||
|
||||
@@ -510,6 +591,7 @@ png_uint_32 get_value (FILE *pnm_file, int depth)
|
||||
{
|
||||
static png_uint_32 mask = 0;
|
||||
png_byte token[16];
|
||||
unsigned long ul_ret_value;
|
||||
png_uint_32 ret_value;
|
||||
int i = 0;
|
||||
|
||||
@@ -518,7 +600,8 @@ png_uint_32 get_value (FILE *pnm_file, int depth)
|
||||
mask = (mask << 1) | 0x01;
|
||||
|
||||
get_token (pnm_file, (char *) token);
|
||||
sscanf ((const char *) token, "%lu", &ret_value);
|
||||
sscanf ((const char *) token, "%lu", &ul_ret_value);
|
||||
ret_value = (png_uint_32) ul_ret_value;
|
||||
|
||||
ret_value &= mask;
|
||||
|
||||
|
||||
Reference in New Issue
Block a user