#ifndef HYPERDRM_SPATIAL_IMAGE_H
#define HYPERDRM_SPATIAL_IMAGE_H
#include <stdlib.h>
#include <stdio.h>
#include "layout.h"
#include "interpolation.h"
#include "color_boost.h"
enum {SPATIAL_WIDTH=160,SPATIAL_HEIGHT=90,SPATIAL_PIXELS=SPATIAL_WIDTH*SPATIAL_HEIGHT};
/* Synthetic color plane from histogram samples, never captured video pixels.
 * HyperHDR 22 treats JSON color as a solid color; image input retains space.
 * The receiver samples this plane using its configured LED rectangles. */
static char *spatial_image_command(const unsigned char regions[16][3],unsigned priority){
 static LedBlend blends[SPATIAL_PIXELS];static unsigned generation;
 if(generation!=calibration_generation){
  for(unsigned y=0;y<SPATIAL_HEIGHT;y++)for(unsigned x=0;x<SPATIAL_WIDTH;x++)
   blends[y*SPATIAL_WIDTH+x]=layout_blend((x+0.5)/SPATIAL_WIDTH,(y+0.5)/SPATIAL_HEIGHT);
  generation=calibration_generation;
 }
 const char alphabet[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 size_t capacity=SPATIAL_PIXELS*4+256;char *line=malloc(capacity);if(!line)return NULL;
 size_t used=snprintf(line,capacity,"{\"command\":\"image\",\"priority\":%u,\"duration\":1500,\"origin\":\"HyperDRM\",\"imagewidth\":%u,\"imageheight\":%u,\"format\":\"rgb\",\"name\":\"Histogram colors\",\"imagedata\":\"",priority,SPATIAL_WIDTH,SPATIAL_HEIGHT);
 for(unsigned i=0;i<SPATIAL_PIXELS;i++){
  unsigned char rgb[3],color[3];LedBlend b=blends[i];blend_color(regions[b.a],regions[b.b],b.weight,rgb);boost_color(rgb,color);
  line[used++]=alphabet[color[0]>>2];line[used++]=alphabet[((color[0]&3)<<4)|(color[1]>>4)];
  line[used++]=alphabet[((color[1]&15)<<2)|(color[2]>>6)];line[used++]=alphabet[color[2]&63];
 }
 line[used++]='"';line[used++]='}';line[used++]='\n';line[used]=0;return line;
}
#endif