#include "z80analyze.h"
#include "z80.h"
#include <SDL2/SDL.h>

namespace z80analyze
{
    SDL_Window *win = nullptr;
    SDL_Renderer *ren = nullptr;
    SDL_Texture *tex = nullptr;

    void show()
    {
        if (!win)
        {
            win = SDL_CreateWindow("Z80 Analyzer", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 256, 256, SDL_WINDOW_SHOWN);
            ren = SDL_CreateRenderer(win, -1, 0);
            tex = SDL_CreateTexture(ren, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, 256, 256);
        }
        refresh();
    }

    void refresh()
    {
        Uint32 *pixels;
        int pitch;
        SDL_LockTexture(tex, NULL, (void**)&pixels, &pitch);
        for (int i=0; i<65536; ++i)
        {
            uint8_t tag = z80::getMemTag(i);
            pixels[i] = tag==MEMTAG_NONE ? 0x808080 : tag==MEMTAG_DATA ? 0x0000FF : 0x00FF00;
        }
        SDL_UnlockTexture(tex);
        SDL_RenderCopy(ren, tex, NULL, NULL);
        SDL_RenderPresent(ren);
    }

    void hide()
    {
        SDL_DestroyTexture(tex);
        SDL_DestroyRenderer(ren);
        SDL_DestroyWindow(win);
    }
}