# To subscribers of the xforms list from Yann Guichoux <guichoux@shom.fr> :
Hi,
I'm trying to convert an XImage to an flimage (still trying !!!)
I 've almost succeded ! my last problem is coming from pixel values .
the flimage type i'm using is FL_IMAGE_CI.
i'm creating an ximage with XGetImage(pixmap)
then, i use XGetPixel() to get pixel values from the XImage and
i fill the flimage->ci array with these pixel values :
fl_image->ci[j][i]=XGetPixel(ximage,i,j);
but the pixelvalues i get by this way are not corresponding to the good
index into the lookup table defined in flimage structure.
( red_lut green_lut blue_lut arrays )
How should i process to convert pixel values from the ximage to color
index in the lookup table ??
here is a piece of code i wrote :
/*** first getting the ximage ***/
x_image=XGetImage(ap->_dpy,carte->get_win(),200,200,300,300,AllPlanes,ZPixmap);
/*** then initialising the flimage ***/
fl_image=flimage_alloc();
fl_image->type=FL_IMAGE_CI;
fl_image->w=ximage->width;
fl_image->h=ximage->height;
fl_image->map_len=256;
flimage_getmem(fl_image);
/*** filling the look up table ***/
for (i=0;i<fl_image->map_len;i++)
{
fl_getmcolor(IDCOL1+i,&red,&green,&blue); <--- i think my problem is
coming from here
fl_image->red_lut[i]=(short)red; With XGetPixel() i'm not getting the
good index in my colormap
fl_image->green_lut[i]=(short)green;
fl_image->blue_lut[i]=(short)blue;
}
/*** filling the color Index array ***/
for (i=0; i<ximage->width; i++)
for (j=0; j<ximage->height ; j++)
{
fl_image->ci[j][i]=XGetPixel(x_image,i,j);
}
/*** saving the image file ***/
flimage_dump(fl_image,"./test.gif","gif);
how should i do to make it works ???
thanks for any help...
YG
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