src/weblet/counter/counter.c 1.5
1.5 2009/08/19 23:35:58 angie
Added option to mgSaveToGif and its call stack, to use GIF's Graphic Control Extension to make memgfx's background color (0) transparent. Also corrected terminology for PNG in .h files: useAlpha -> useTransparency.
Index: src/weblet/counter/counter.c
===================================================================
RCS file: /projects/compbio/cvsroot/kent/src/weblet/counter/counter.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -b -B -U 1000000 -r1.4 -r1.5
--- src/weblet/counter/counter.c 8 Nov 2006 17:48:12 -0000 1.4
+++ src/weblet/counter/counter.c 19 Aug 2009 23:35:58 -0000 1.5
@@ -1,92 +1,92 @@
/* counter.c - A simple web hit counter. */
#include "common.h"
#include <time.h>
#include "cheapcgi.h"
#include "memgfx.h"
#include "obscure.h"
struct memGfx *makeCountPic(long count, MgFont *font)
{
char text[16];
int textWidth, textHeight;
int pixWidth, pixHeight;
struct memGfx *mg;
sprintf(text, "%ld", count);
textWidth = mgFontStringWidth(font, text);
textHeight = mgFontLineHeight(font);
pixWidth = textWidth + 4;
pixHeight = textHeight + 4;
mg = mgNew(pixWidth, pixHeight);
mgClearPixels(mg);
mgTextCentered(mg, 0, 0, pixWidth, pixHeight, MG_BLACK, font, text);
return mg;
}
long incCount(char *fileName, boolean saveWhence)
/* Increment counter at start of file. Add hit to end of file.
* Return count. */
{
long val = 0;
FILE *f = fopen(fileName, "r+b");
char *ip;
int ipSize;
time_t seconds = time(NULL);
ip = getenv("REMOTE_HOST");
if (ip == NULL || ip[0] == 0)
ip = getenv("REMOTE_ADDR");
if (ip == NULL)
ip = "";
ipSize = strlen(ip) + 1;
if (f != NULL)
{
fread(&val, sizeof(val), 1, f);
rewind(f);
}
else
{
f = fopen(fileName, "wb");
}
++val;
if (f != NULL)
{
fwrite(&val, sizeof(val), 1, f);
fseek(f, 0L, SEEK_END);
fwrite(&seconds, sizeof(seconds), 1, f);
fwrite(ip, ipSize, 1, f);
if (saveWhence)
{
char *whence = getenv("HTTP_REFERER");
int whenceSize;
if (whence == NULL)
whence = "";
whenceSize = strlen(whence)+1;
fwrite(whence, whenceSize, 1, f);
}
}
return val;
}
int main(int argc, char *argv[])
{
char *counterFileName;
long count;
struct memGfx *mg;
boolean saveWhence = cgiBoolean("whence");
boolean mute = cgiBoolean("mute");
counterFileName = cgiOptionalString("file");
if (counterFileName == NULL)
counterFileName = "default.ctr";
count = incCount(counterFileName, saveWhence);
if (mute)
mg = mgNew(1, 1);
else
mg = makeCountPic(count, mgMediumFont());
fprintf(stdout, "Content-type: image/gif\n\n");
-mgSaveToGif(stdout, mg);
+mgSaveToGif(stdout, mg, FALSE);
return 0;
}