fxengine/src/fxengine.c

#define GINT_NEED_VRAM
#include <gint/display.h>
#include <stdint.h>
#include <fxengine/fxengine.h>
#ifdef USE_LIBPROF 
#include <libprof.h>
#endif
#include <gint/std/stdlib.h>
#include <gint/std/string.h>
#include <stdbool.h>
#include <fxengine/renderlist.h>
#include <fxengine/render/buffer.h>

// FPS count
#ifdef USE_LIBPROF 
static uint32_t frame_interval_min=1000000;
static uint32_t frame_interval_max=1;
static uint32_t fps=0;
#endif
uint32_t fe_get_fps()
{return fps;}

// Triple buffering
#define BUFFER_SIZE 256
static uint32_t triple_buffering_area[2*BUFFER_SIZE]; // 2 buffers supplémentaires
static uint32_t * const temp_buffers[2] = {&triple_buffering_area[0], &triple_buffering_area[BUFFER_SIZE]};
static uint32_t * gint_vram=0;
static uint32_t working_buffer=0;

static void check_vram()
{
    if (gint_vram==0)
        gint_vram=vram;
}

void fe_callback_start()
{
    vram=gint_vram;
    memcpy(gint_vram, temp_buffers[1-working_buffer], sizeof(uint32_t)*BUFFER_SIZE);
}

void fe_callback_end()
{
    vram=temp_buffers[working_buffer];
}

void fe_draw()
{
    memcpy(gint_vram, temp_buffers[1-working_buffer], sizeof(uint32_t)*BUFFER_SIZE);
}

void switch_frame()
{
    working_buffer=1-working_buffer;
    vram=temp_buffers[working_buffer];
    dclear(C_WHITE);
}

static volatile bool quit=true;

void fe_load()
{
    check_vram();
    quit=false;
    while (1)
    {
        fe_clear_zbuffer();
        fe_render();
        switch_frame();
        if (quit)
            break;
    }
    // Free some malloc
    //// as object list
}

void fe_quit()
{
    quit=1;
}