main.c

#include <pspdisplay.h>
#include <pspctrl.h> // Allows us to read input from the PSP's keys
#include <pspkernel.h>
#include <pspdisplay.h>
#include <pspdebug.h>
#include <pspgu.h> 
#include <png.h> // <Manipulate the PNG Image files
#include <stdio.h> // Has some C functions (sprintf() to parse strings)
#include <graphics.h>

#define RGB(r, g, b) ((r)|((g)<<8)|((b)<<16))
#define printf pspDebugScreenPrintf
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) // Returns X if greater than Y, or returns Y if less

PSP_MODULE_INFO("Image Displayer", 0, 1, 1);

/* Exit callback */
int exit_callback(int arg1, int arg2, void *common) {
          sceKernelExitGame();
          return 0;
}

/* Callback thread */
int CallbackThread(SceSize args, void *argp) {
          int cbid;

          cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
          sceKernelRegisterExitCallback(cbid);

          sceKernelSleepThreadCB();

          return 0;
}

/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void) {
          int thid = 0;

          thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
          if(thid >= 0) {
                    sceKernelStartThread(thid, 0, 0);
          }

          return thid;
}
          
struct object {
int x;
int y;
int obj_state; // 0 = ground, 1 = jumping, 2 = falling       
}


int main() {
    SceCtrlData pad;
    struct object box;
    box.x = 50;
    box.y = 230;

    //char buffer[200]; // Block of memory of 200 variables for a string (maximum length it can be)
    Image* ourImage;
       
    SetupCallbacks();
    pspDebugScreenInit();
    initGraphics();
       
       
    //sprintf(buffer, "ourImage.png");
    ourImage = loadImage("ourImage.png");
    if(ourImage)
    {
      // This is a cycle, or frame. It'll keep happening, 60 times a second.
      while(1)
      {
        // First, find out what the state of the control pad is.
        sceCtrlPeekBufferPositive(&pad, 1);

        // Change the position of the box based on this state.
        if(pad.Buttons & PSP_CTRL_LEFT)
          box.x-=4;
        else

        if(pad.Buttons & PSP_CTRL_RIGHT)
          box.x+=4;

        // Wait for the end of the cycle                   
        sceDisplayWaitVblankStart();

        // Render the screen
        fillScreenRect(RGB(70, 130, 150), 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
        blitAlphaImageToScreen(0 ,0 ,32 , 32, ourImage, box.x, box.y);
        printTextScreen(70,70,"Hello",255);
        flipScreen(); // Just updates the screen

        // Go again
      }
    }
     
    sceKernelSleepThread(); // Wait for home
    return 0;
}