#include "bmp_writer/bmp_writer.h"
 
/**
 * User's callback function which returns color of particular pixel on the
 * screen.
 *
 * Since it is fictional screenshot, this function just generates a gradient.
 */
static T_BmpWr_Color32 _bmp_pix_color_get_32(
      uintptr_t user_data,
      T_BmpWr_Coord x,
      T_BmpWr_Coord y
      )
{
   return BMP_WR__COL_RGB_32bit(0x00, 0xff - x, x);
}
 
 
int main(void)
{
 
   //-- Create struct with params for bmp generator
   T_BmpWriter_CtorParams writer_ctor_params = {
 
      //-- Main image params: color depth, size
      .color_depth = BMP_WR_COL_DEPTH__24,
      .width       = 256,
      .height      = 50,
 
      //-- User's callback functions
      .callback = {
         //-- for this mode, we need just one function that returns color for
         //   24- and 32-bit images
         .func = {
            .bpp_24_32 = {
               .p_pix_color_get = _bmp_pix_color_get_32,
            },
         },
      },
   };
 
   //-- Create T_BmpWriter object with appropriate params
   T_BmpWriter *p_bmp_writer = new_bmp_writer(&writer_ctor_params);
 
   //-- Now, byte by byte, retrieve all the data!
 
   while (bmp_writer__available_data_len__get(p_bmp_writer) > 0){
      char cur_char = bmp_writer__next_byte__get(p_bmp_writer);
 
      //-- Now, cur_char contains next byte of the bmp file data.
      //   We're free to do whatever we want with it: maybe fill some
      //   fixed-size buffer that will be written to flash when buffer is
      //   full, or transmit somewhere, or anything.
   }
 
   //-- Done; image is generated.
   //   Delete the object.
   delete_bmp_writer(p_bmp_writer);
 
   return 0;
}