nesemu/gui/main_window.c

//
// Created by william on 6/8/24.
//

#include <SDL_ttf.h>
#include "main_window.h"
#include "log.h"
#include "char_map.h"
#include "gui.h"

void main_window_init(NesMainWindow *window, TTF_Font *font) {
    window->sdl_context = window_init("NES Emulator", MAIN_WINDOW_WIDTH, MAIN_WINDOW_HEIGHT, MAIN_WINDOW_SCALE);
    window->texture = SDL_CreateTexture(window->sdl_context.renderer, SDL_PIXELFORMAT_ARGB8888,
                                        SDL_TEXTUREACCESS_STREAMING, MAIN_WINDOW_WIDTH, MAIN_WINDOW_HEIGHT);
    char_map_init(window->sdl_context.renderer, font);
}

void main_window_uninit(NesMainWindow *window) {
    char_map_uninit();

    SDL_DestroyTexture(window->texture);
    window_uninit(window->sdl_context);
}

void main_window_render_delay(SDL_Renderer *renderer) {
    Uint32 delay = gui_get_frame_delay();

    char buffer[5];
    buffer[0] = (char) ((delay / 10) + 48);
    buffer[1] = (char) ((delay % 10) + 48);
    buffer[2] = ' ';
    buffer[3] = 'm';
    buffer[4] = 's';

    char_map_render(renderer, buffer);
}

void main_window_render(NesMainWindow *window, PPUPixel *pixels) {
    SDL_RenderClear(window->sdl_context.renderer);

    unsigned int frame_buffer[240 * 256];

    for (int i = 0; i < 240 * 256; i++) {
        PPUPixel pixel = pixels[i];

        unsigned int *data = &frame_buffer[i];
        *data = 0xff000000;
        *data |= pixel.r << 16;
        *data |= pixel.g << 8;
        *data |= pixel.b;
    }

    SDL_UpdateTexture(window->texture, NULL, &frame_buffer, 240 * sizeof(unsigned int));
    SDL_RenderCopy(window->sdl_context.renderer, window->texture, NULL, NULL);

    if (gui_debug_enabled()) {
        main_window_render_delay(window->sdl_context.renderer);
    }
}

void main_window_present(NesMainWindow *window) {
    SDL_RenderPresent(window->sdl_context.renderer);
}