#ifndef NOVA64_FRAMEBUFFER_H
#define NOVA64_FRAMEBUFFER_H

#include "nova64_core.h"
#include "nova64_ppu_interface.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

// Display dimensions
#define NOVA64_DISPLAY_WIDTH 480
#define NOVA64_DISPLAY_HEIGHT 800
#define NOVA64_DISPLAY_PIXELS (NOVA64_DISPLAY_WIDTH * NOVA64_DISPLAY_HEIGHT)


// Framebuffer size in bytes (768,000 bytes)
#define NOVA64_FRAMEBUFFER_SIZE_BYTES (NOVA64_DISPLAY_PIXELS * sizeof(pixel_t))

// Alignment requirement for PPU/DMA2D on ESP32-P4 (cache line alignment)
#define NOVA64_DMA_ALIGNMENT 64

typedef struct {
  pixel_t *front_buffer; // Buffer currently being read by display/MIPI-DSI
  pixel_t *back_buffer;  // Buffer currently being written to by WASM/PPU

  volatile bool vsync_pending; // True when a buffer swap has been requested
  uint32_t frame_count;        // Frame counter
} nova64_framebuffer_t;

// Global instance access
NOVA64_API nova64_framebuffer_t nova64_framebuffer;

// Function prototypes
bool nova64_framebuffer_init(void);
void nova64_framebuffer_destroy(void);
void nova64_framebuffer_swap(void);
void nova64_framebuffer_clear(pixel_t color);

#endif // NOVA64_FRAMEBUFFER_H