mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

Imported from libpng-1.2.26beta03.tar

Browse Source
This commit is contained in:
Glenn Randers-Pehrson
2008-03-16 17:23:05 -05:00
parent c13f8f10e6
commit 3236beddf8
57 changed files with 380 additions and 272 deletions
Download Patch File Download Diff File Expand all files Collapse all files

112
contrib/gregbook/rpng2-win.c
View File

@@ -10,7 +10,7 @@
tweaking (or maybe not). Thanks to Adam Costello and Pieter S. van der
Meulen for the "diamond" and "radial waves" patterns, respectively.
to do:
to do (someday, maybe):
- handle quoted command-line args (especially filenames with spaces)
- finish resizable checkerboard-gradient (sizes 4-128?)
- use %.1023s to simplify truncation of title-bar string?
@@ -29,10 +29,13 @@
- 1.21: made minor tweak to usage screen to fit within 25-line console
- 1.22: added AMD64/EM64T support (__x86_64__)
- 2.00: dual-licensed (added GNU GPL)
- 2.01: fixed 64-bit typo in readpng2.c
- 2.02: fixed improper display of usage screen on PNG error(s); fixed
unexpected-EOF and file-read-error cases
---------------------------------------------------------------------------
Copyright (c) 1998-2007 Greg Roelofs. All rights reserved.
Copyright (c) 1998-2008 Greg Roelofs. All rights reserved.
This software is provided "as is," without warranty of any kind,
express or implied. In no event shall the author or contributors
@@ -83,7 +86,7 @@
#define PROGNAME "rpng2-win"
#define LONGNAME "Progressive PNG Viewer for Windows"
#define VERSION "2.00 of 2 June 2007"
#define VERSION "2.02 of 16 March 2008"
#include <stdio.h>
#include <stdlib.h>
@@ -414,41 +417,11 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
}
}
if (!filename) {
if (!filename)
++error;
} else if (!(infile = fopen(filename, "rb"))) {
fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename);
++error;
} else {
incount = fread(inbuf, 1, INBUFSIZE, infile);
if (incount < 8 || !readpng2_check_sig(inbuf, 8)) {
fprintf(stderr, PROGNAME
": [%s] is not a PNG file: incorrect signature\n",
filename);
++error;
} else if ((rc = readpng2_init(&rpng2_info)) != 0) {
switch (rc) {
case 2:
fprintf(stderr, PROGNAME
": [%s] has bad IHDR (libpng longjmp)\n",
filename);
break;
case 4:
fprintf(stderr, PROGNAME ": insufficient memory\n");
break;
default:
fprintf(stderr, PROGNAME
": unknown readpng2_init() error\n");
break;
}
++error;
}
if (error)
fclose(infile);
}
/* usage screen */
/* print usage screen if any errors up to this point */
if (error) {
int ch;
@@ -488,6 +461,48 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
ch = _getch();
while (ch != 'q' && ch != 'Q' && ch != 0x1B);
exit(1);
}
if (!(infile = fopen(filename, "rb"))) {
fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename);
++error;
} else {
incount = fread(inbuf, 1, INBUFSIZE, infile);
if (incount < 8 || !readpng2_check_sig(inbuf, 8)) {
fprintf(stderr, PROGNAME
": [%s] is not a PNG file: incorrect signature\n",
filename);
++error;
} else if ((rc = readpng2_init(&rpng2_info)) != 0) {
switch (rc) {
case 2:
fprintf(stderr, PROGNAME
": [%s] has bad IHDR (libpng longjmp)\n", filename);
break;
case 4:
fprintf(stderr, PROGNAME ": insufficient memory\n");
break;
default:
fprintf(stderr, PROGNAME
": unknown readpng2_init() error\n");
break;
}
++error;
}
if (error)
fclose(infile);
}
if (error) {
int ch;
fprintf(stderr, PROGNAME ": aborting.\n");
do
ch = _getch();
while (ch != 'q' && ch != 'Q' && ch != 0x1B);
exit(2);
} else {
fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname);
fprintf(stderr,
@@ -519,7 +534,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
} else
rpng2_info.need_bgcolor = TRUE;
rpng2_info.done = FALSE;
rpng2_info.state = kPreInit;
rpng2_info.mainprog_init = rpng2_win_init;
rpng2_info.mainprog_display_row = rpng2_win_display_row;
rpng2_info.mainprog_finish_display = rpng2_win_finish_display;
@@ -539,10 +554,27 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
if (readpng2_decode_data(&rpng2_info, inbuf, incount))
++error;
Trace((stderr, "done with readpng2_decode_data()\n"))
if (error || feof(infile) || rpng2_info.done)
if (error || incount != INBUFSIZE || rpng2_info.state == kDone) {
if (rpng2_info.state == kDone) {
Trace((stderr, "done decoding PNG image\n"))
} else if (ferror(infile)) {
fprintf(stderr, PROGNAME
": error while reading PNG image file\n");
exit(3);
} else if (feof(infile)) {
fprintf(stderr, PROGNAME ": end of file reached "
"(unexpectedly) while reading PNG image file\n");
exit(3);
} else /* if (error) */ {
// will print error message below
}
break;
}
if (timing)
Sleep(1000L);
incount = fread(inbuf, 1, INBUFSIZE, infile);
}
@@ -589,7 +621,7 @@ static void rpng2_win_init()
ulg rowbytes = rpng2_info.rowbytes;
Trace((stderr, "beginning rpng2_win_init()\n"))
Trace((stderr, " rowbytes = %ld\n", rpng2_info.rowbytes))
Trace((stderr, " rowbytes = %d\n", rpng2_info.rowbytes))
Trace((stderr, " width = %ld\n", rpng2_info.width))
Trace((stderr, " height = %ld\n", rpng2_info.height))
@@ -619,6 +651,8 @@ static void rpng2_win_init()
readpng2_cleanup(&rpng2_info);
return;
}
rpng2_info.state = kWindowInit;
}
@@ -1114,7 +1148,7 @@ static void rpng2_win_finish_display()
* we have nothing to do here except set a flag and let the user know
* that the image is done */
rpng2_info.done = TRUE;
rpng2_info.state = kDone;
printf(
"Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n");
fflush(stdout);