gfx.cpp as of 2023-11-16

#include <game/gfx.hpp>


//contains default palette
#define _UTILS_GFX_CPP
#include <utils/_gfx_tables.h>
#undef _UTILS_GFX_CPP




gfx_class::gfx_class(SDL_Renderer* renderer, const SDL_Color* palette){
  //some domain checks
  if(renderer == nullptr) throw "renderer = nullptr";
  if(palette == nullptr) throw "palette = nullptr";
  _renderer = renderer;
  _palette = palette;


  //create a font for every palette color combination
  for(int color=0; color<256; ++color){
    SDL_Color txt = palette[    color&15 ];
    SDL_Color bg  = palette[16+(color>>4)];
    _colors[color] = new font8x8(renderer, bg, txt);
  }


  _valid = SDL_TRUE;
  clear(clr_black);

}




void gfx_class::present(){
  if(!_valid) throw "invalid gfx class";

  for(int yi=0; yi<45; ++yi){
    for(int xi=0; xi<80; ++xi){
      gfx_char chr = chars[yi][xi];
      _colors[chr.color.both]->putChar(chr.chr, xi,yi);
    }
  }

  SDL_RenderPresent(_renderer);
}



void gfx_class::clear(gfx_colors fillColor){
  if(!_valid) throw "invalid gfx class";
  gfx_char fillValue = { .chr = ' ' };
  fillValue.color.bg = fillColor;

  for(int yi=0; yi<45; ++yi)
    for(int xi=0; xi<80; ++xi)
      chars[yi][xi].value = fillValue.value;
}




void gfx_class::set(gfx_char newChar, Uint32 column, Uint32 row){
  if(!_valid) throw "invalid gfx class";
  if(column<80 && row<45){
    if(newChar.bgt){ //char has a transparent background
      chars[row][column].chr = newChar.chr;
      chars[row][column].color.txt = newChar.color.txt;
    } else { //char has an opaque background
      chars[row][column].value = newChar.value;
    }
  }
}