On 14.05.2010, at 20:53, <[email protected]> <[email protected]> wrote:
> That actually worked perfectly, thanks for the help, would you happen to know
> how to print it out as a jpeg to a file, or a bmp, or something that can be
> loaded later?
Sure, here you go. Just copy and paste this into FL_JPEG_Image.cxx or in your
own files:
int fl_write_jpeg(Fl_RGB_Image *img, const char *name, int quality, float dpi)
{
int ret = -1;
#ifdef HAVE_LIBJPEG
if (img->w()<1) return ret;
if (img->h()<1) return ret;
if (img->d()!=3) return ret;
if (!img->data()) return ret;
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE * outfile; /* target file */
JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
int row_stride; /* physical row width in image buffer */
if ((outfile = fopen(name, "wb")) == NULL)
return ret;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, outfile);
cinfo.image_width = img->w();
cinfo.image_height = img->h();
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
cinfo.density_unit = 1;
cinfo.X_density = cinfo.Y_density = (UINT16)dpi;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
// todo: set DPI here
jpeg_start_compress(&cinfo, TRUE);
row_stride = img->w() * 3;
const uchar *data = img->array;
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer[0] = (JSAMPLE*)data + (cinfo.next_scanline * row_stride);
jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
fclose(outfile);
jpeg_destroy_compress(&cinfo);
ret = 0;
#endif // HAVE_LIB_JPEG
return ret;
}
_______________________________________________
fltk mailing list
[email protected]
http://lists.easysw.com/mailman/listinfo/fltk
