/** Write a signed 16-bit integer
* \param[in] n number to be written
*/
void BufferedWriter::putNum(int16_t n) {
if (n < 0) {
putChar('-');
n = -n;
}
putNum((uint16_t)n);
}
//------------------------------------------------------------------------------
void ostream::putNum(int32_t n) {
bool neg = n < 0 && flagsToBase() == 10;
if (neg) {
n = -n;
}
putNum(n, neg);
}
/** Write a unsigned 16-bit integer
* \param[in] n number to be written
*/
void BufferedWriter::putNum(uint16_t n) {
if (n < 256) {
putNum((uint8_t)n);
return;
}
uint8_t len = n < 1000 ? 3 : n < 10000 ? 4 : 5;
if ((in_ + len) >= sizeof(buf_)) {
writeBuf();
}
in_ += len;
char* str = buf_ + in_ - 1;
do {
// avoid mod, it's slow.
uint16_t tmp = n;
n /= 10;
*str-- = '0' + tmp - 10 * n;
} while (n);
}
/** Write an unsigned 32-bit number
* \param[in] n number to be written
*/
void BufferedWriter::putNum(uint32_t n) {
uint8_t len;
if (n < 0X10000) {
putNum((uint16_t)n);
return;
}
if (n < 10000000) {
len = n < 100000 ? 5 : n < 1000000 ? 6 : 7;
} else {
len = n < 100000000 ? 8 : n < 1000000000 ? 9 : 10;
}
if ((in_ + len) >= sizeof(buf_)) {
writeBuf();
}
in_ += len;
char* str = buf_ + in_ - 1;
do {
// avoid mod, it's slow.
uint32_t tmp = n;
n /= 10;
*str-- = '0' + tmp - 10 * n;
} while (n);
}
int
write_pnm_file(IOSTREAM *fd, XImage *img,
Display *disp, Colormap cmap, int scale, int fmt, int encode)
{ int width = img->width;
int height = img->height;
XColor cdata[256];
XPixelInfo info;
int x, y;
if ( !scale )
scale = 255;
if ( !fmt )
{ if ( img->format == XYBitmap )
fmt = PNM_PBM;
else
fmt = PNM_PPM;
}
if ( fmt == PNM_PBM && encode == PNM_RUNLEN )
encode = PNM_RAWBITS; /* no use to runlen encode a bitmap */
if ( img->format != XYBitmap )
{ info.cinfo = cdata;
makeXPixelInfo(&info, img, disp, cmap);
}
Sfprintf(fd, "P%c\n", fmt + encode + '0');
Sfprintf(fd, "# Creator: XPCE version %s\n",
strName(get(PCE,NAME_version,EAV)));
Sfprintf(fd, "%d %d\n", width, height);
if ( fmt != PNM_PBM )
Sfprintf(fd, "%d\n", scale);
file_col = 0;
switch(encode)
{ case PNM_ASCII:
{ switch(fmt)
{ case PNM_PBM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ unsigned long pixel = XGetPixel(img, x, y);
if ( img->format != XYBitmap )
{ XColor *c;
int r;
c = pixelToColor(img, pixel, &info);
r = intensityXColor(c);
pixel = r < 32768 ? 1 : 0;
}
if ( putNum(pixel, fd) < 0 )
return -1;
}
}
break;
}
case PNM_PGM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ XColor *c;
unsigned int r;
c = pixelToColor(img, XGetPixel(img, x, y), &info);
r = intensityXColor(c);
r = rescale(r, BRIGHT, scale);
if ( putNum(r, fd) < 0 )
return -1;
}
}
break;
}
case PNM_PPM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ XColor *c;
unsigned int r, g, b;
c = pixelToColor(img, XGetPixel(img, x, y), &info);
r = rescale(c->red, BRIGHT, scale);
g = rescale(c->green, BRIGHT, scale);
b = rescale(c->blue, BRIGHT, scale);
if ( putNum(r, fd) < 0 ||
putNum(g, fd) < 0 ||
putNum(b, fd) < 0 )
return -1;
}
}
break;
}
}
if ( file_col && Sputc('\n', fd) == EOF )
return -1;
file_col = 0;
}
case PNM_RAWBITS:
{ switch(fmt)
{ case PNM_PBM:
{ int byte = 0;
int bit = 7;
for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ unsigned long pixel = XGetPixel(img, x, y);
if ( img->format != XYBitmap )
{ XColor *c;
int r;
c = pixelToColor(img, pixel, &info);
r = intensityXColor(c);
pixel = r < 32768 ? 1 : 0;
}
if ( pixel )
byte |= 1<<bit;
if ( bit-- == 0 )
{ if ( Sputc(byte, fd) == EOF )
return -1;
bit = 7;
byte = 0;
}
}
if ( bit != 7 ) /* flush after finishing scanline */
{ if ( Sputc(byte, fd) == EOF )
return -1;
bit = 7;
byte = 0;
}
}
if ( bit != 7 )
{ if ( Sputc(byte, fd) == EOF )
return -1;
}
break;
}
case PNM_PGM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ XColor *c;
unsigned int r;
c = pixelToColor(img, XGetPixel(img, x, y), &info);
r = intensityXColor(c);
r = rescale(r, BRIGHT, scale);
if ( Sputc(r, fd) == EOF )
return -1;
}
}
break;
}
case PNM_PPM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ XColor *c;
unsigned int r, g, b;
c = pixelToColor(img, XGetPixel(img, x, y), &info);
r = rescale(c->red, BRIGHT, scale);
g = rescale(c->green, BRIGHT, scale);
b = rescale(c->blue, BRIGHT, scale);
if ( Sputc(r, fd) == EOF ||
Sputc(g, fd) == EOF ||
Sputc(b, fd) == EOF )
return -1;
}
}
break;
}
}
}
case PNM_RUNLEN:
{ int rlen=-1;
unsigned long cpixel = NOPIXEL;
switch(fmt)
{ case PNM_PGM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ unsigned long pixel = XGetPixel(img, x, y);
if ( pixel == cpixel && rlen < 255 )
rlen++;
else
{ XColor *c;
int r;
if ( rlen > 0 && Sputc(rlen, fd) == EOF )
return -1;
cpixel = pixel;
rlen = 1;
c = pixelToColor(img, pixel, &info);
r = intensityXColor(c);
r = rescale(r, BRIGHT, scale);
if ( Sputc(r, fd) == EOF )
return -1;
}
}
}
if ( Sputc(rlen, fd) == EOF )
return -1;
break;
}
case PNM_PPM:
{ for(y=0; y<height; y++)
{ for(x=0; x<width; x++)
{ unsigned long pixel = XGetPixel(img, x, y);
if ( pixel == cpixel && rlen < 255 )
rlen++;
else
{ XColor *c;
unsigned int r, g, b;
if ( rlen > 0 && Sputc(rlen, fd) == EOF )
return -1;
cpixel = pixel;
rlen = 1;
c = pixelToColor(img, pixel, &info);
r = rescale(c->red, BRIGHT, scale);
g = rescale(c->green, BRIGHT, scale);
b = rescale(c->blue, BRIGHT, scale);
if ( Sputc(r, fd) == EOF ||
Sputc(g, fd) == EOF ||
Sputc(b, fd) == EOF )
return -1;
}
}
}
if ( Sputc(rlen, fd) == EOF )
return -1;
break;
}
}
}
}
return 0;
}