Windows Game Programming for Dummies (2nd Edition)/WinGamProgFD.iso/pc/Source/GPCHAP14/PROG14_2.CPP

C/C++ Source or Header | 2002-04-29 | 16.8 KB | 620 lines

// PROG14_2.CPP - DirectInput mouse demo

// INCLUDES ///////////////////////////////////////////////

#define WIN32_LEAN_AND_MEAN
#define INITGUID

#include <windows.h>   // include important windows stuff
#include <windowsx.h>
#include <mmsystem.h>
#include <iostream.h> // include important C/C++ stuff
#include <conio.h>
#include <objbase.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <math.h>
#include <io.h>
#include <fcntl.h>

#include <ddraw.h>     // directX includes
#include <dinput.h>
#include "gpdumb1.h"   // make sure to include GPDUMB1.CPP in the project

// DEFINES ////////////////////////////////////////////////

// defines for windows
#define WINDOW_CLASS_NAME "WINXCLASS"  // class name

#define WINDOW_WIDTH    64   // size of window
#define WINDOW_HEIGHT   48

#define BUTTON_SPRAY    0    // defines for each button
#define BUTTON_PENCIL   1
#define BUTTON_ERASE    2
#define BUTTON_EXIT     3

// PROTOTYPES /////////////////////////////////////////////

// game console
int Game_Init(void *parms=NULL);
int Game_Shutdown(void *parms=NULL);
int Game_Main(void *parms=NULL);

// GLOBALS ////////////////////////////////////////////////

HWND main_window_handle = NULL; // save the window handle
HINSTANCE main_instance = NULL; // save the instance
char buffer[80];                // used to print text

// directinput globals
LPDIRECTINPUT8       lpdi      = NULL;    // dinput object
LPDIRECTINPUTDEVICE8 lpdikey   = NULL;    // dinput keyboard
LPDIRECTINPUTDEVICE8 lpdimouse = NULL;    // dinput mouse
LPDIRECTINPUTDEVICE8 lpdijoy   = NULL;    // dinput joystick
GUID                 joystickGUID;        // guid for main joystick
char                 joyname[80];         // name of joystick

// these contain the target records for all di input packets
UCHAR keyboard_state[256]; // contains keyboard state table
DIMOUSESTATE mouse_state;  // contains state of mouse
DIJOYSTATE joy_state;      // contains state of joystick

// demo globals
BOB          buttons,           // a bob with all the buttons
             pointer;           // a pointer bob
BITMAP_IMAGE cpanel;            // the control panel
BITMAP_IMAGE canvas;            // off screen drawing canvas

int mouse_x,                    // used to track mouse
    mouse_y;

UCHAR mouse_color=100;          // color of mouse brush

int command_state=0;            // state of user command

// position of control buttons
int buttons_x[] = {509, 559, 509, 559};
int buttons_y[] = {344, 344, 383, 383};

// on/off state of buttons
int buttons_state[] = {0,1,0,0};

// FUNCTIONS //////////////////////////////////////////////

LRESULT CALLBACK WindowProc(HWND hwnd,
                            UINT msg,
                            WPARAM wparam,
                            LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT    ps;           // used in WM_PAINT
HDC            hdc;       // handle to a device context

// what is the message
switch(msg)
    {
    case WM_CREATE:
        {
        // do initialization stuff here
        return(0);
        } break;

    case WM_PAINT:
         {
         // start painting
         hdc = BeginPaint(hwnd,&ps);

         // end painting
         EndPaint(hwnd,&ps);
         return(0);
        } break;

    case WM_DESTROY:
        {
        // kill the application
        PostQuitMessage(0);
        return(0);
        } break;

    default:break;

    } // end switch

// process any messages that we didn't take care of
return (DefWindowProc(hwnd, msg, wparam, lparam));

} // end WinProc

// WINMAIN ////////////////////////////////////////////////

int WINAPI WinMain(    HINSTANCE hinstance,
                    HINSTANCE hprevinstance,
                    LPSTR lpcmdline,
                    int ncmdshow)
{
// this is the winmain function

WNDCLASS winclass;    // this will hold the class we create
HWND     hwnd;        // generic window handle
MSG         msg;        // generic message
HDC      hdc;       // generic dc
PAINTSTRUCT ps;     // generic paintstruct

// first fill in the window class stucture
winclass.style            = CS_DBLCLKS | CS_OWNDC |
                          CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc    = WindowProc;
winclass.cbClsExtra        = 0;
winclass.cbWndExtra        = 0;
winclass.hInstance        = hinstance;
winclass.hIcon            = LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor        = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground    = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName    = NULL;
winclass.lpszClassName    = WINDOW_CLASS_NAME;

// register the window class
if (!RegisterClass(&winclass))
    return(0);

// create the window, note the use of WS_POPUP
if (!(hwnd = CreateWindow(WINDOW_CLASS_NAME, // class
                          "WinX Game Console",     // title
                          WS_POPUP | WS_VISIBLE,
                           0,0,       // x,y
                          WINDOW_WIDTH,  // width
                          WINDOW_HEIGHT, // height
                          NULL,       // handle to parent
                          NULL,       // handle to menu
                          hinstance,// instance
                          NULL)))    // creation parms
return(0);

// save the window handle and instance in a global
main_window_handle = hwnd;
main_instance      = hinstance;

// perform all game console specific initialization
Game_Init();

// enter main event loop
while(1)
    {
    if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
        {
        // test if this is a quit
        if (msg.message == WM_QUIT)
           break;

        // translate any accelerator keys
        TranslateMessage(&msg);

        // send the message to the window proc
        DispatchMessage(&msg);
        } // end if

    // main game processing goes here
    Game_Main();

    } // end while

// shutdown game and release all resources
Game_Shutdown();

// return to Windows like this
return(msg.wParam);

} // end WinMain

// WINX GAME PROGRAMMING CONSOLE FUNCTIONS ////////////////

int Game_Init(void *parms)
{
// this function is where you do all the initialization
// for your game

int index;

// set up screen dimensions
screen_width  = 640;
screen_height = 480;
screen_bpp    = 8;

// initialize directdraw
DD_Init(screen_width, screen_height, screen_bpp);

// initialize directinput and the mouse ///////////////////////

// first create the direct input object
DirectInput8Create(main_instance, DIRECTINPUT_VERSION, IID_IDirectInput8, (void **)&lpdi,NULL);

// create a mouse device  /////////////////////////////////////
lpdi->CreateDevice(GUID_SysMouse, &lpdimouse, NULL);

// set cooperation level
lpdimouse->SetCooperativeLevel(main_window_handle, DISCL_NONEXCLUSIVE | DISCL_BACKGROUND);

// set data format
lpdimouse->SetDataFormat(&c_dfDIMouse);

// acquire the mouse
lpdimouse->Acquire();

/////////////////////////////////////////////////////////////////

// set the global mouse position
mouse_x = SCREEN_WIDTH/2;
mouse_y = SCREEN_HEIGHT/2;

// load the master bitmap in with all the graphics
Load_Bitmap_File(&bitmap8bit, "PAINT.BMP");
Set_Palette(bitmap8bit.palette);

// make sure all the surfaces are clean before starting
DD_Fill_Surface(lpddsback, 0);
DD_Fill_Surface(lpddsprimary, 0);

// create the pointer bob
Create_BOB(&pointer,mouse_x,mouse_y,32,34,1,
           BOB_ATTR_VISIBLE | BOB_ATTR_SINGLE_FRAME,DDSCAPS_SYSTEMMEMORY);

// load the image for the pointer in
Load_Frame_BOB(&pointer,&bitmap8bit,0,0,2,BITMAP_EXTRACT_MODE_CELL);

// create the button bob
Create_BOB(&buttons,0,0,32,34,8,
           BOB_ATTR_VISIBLE | BOB_ATTR_MULTI_FRAME,DDSCAPS_SYSTEMMEMORY);

// load buttons in, two banks of 4, all the off's, then all the on's
for (index=0; index<8; index++)
     Load_Frame_BOB(&buttons,&bitmap8bit,index, index%4,index/4,BITMAP_EXTRACT_MODE_CELL);

// create the bitmap to hold the control panel
Create_Bitmap(&cpanel,500,0,104,424);
Load_Image_Bitmap(&cpanel, &bitmap8bit,150,0,BITMAP_EXTRACT_MODE_ABS);

// create the drawing canvas bitmap
Create_Bitmap(&canvas,0,0,500,SCREEN_HEIGHT);
memset(canvas.buffer,0,canvas.width*canvas.height);
canvas.attr = BITMAP_ATTR_LOADED;

// clear out the canvas
// memset(canvas.buffer,0,canvas.width*canvas.height);

// set clipping rectangle to screen extents so mouse cursor
// doens't mess up at edges
RECT screen_rect = {0,0,screen_width,screen_height};
lpddclipper = DD_Attach_Clipper(lpddsback,1,&screen_rect);

// hide the mouse
ShowCursor(FALSE);

// return success
return(1);

} // end Game_Init

///////////////////////////////////////////////////////////

int Game_Shutdown(void *parms)
{
// this function is where you shutdown your game and
// release all resources that you allocated

// first unacquire the mouse
lpdimouse->Unacquire();

// now release the mouse
lpdimouse->Release();

// release directinput
lpdi->Release();

// unload the bitmap file
Unload_Bitmap_File(&bitmap8bit);

// delete all bobs and bitmaps
Destroy_BOB(&buttons);
Destroy_BOB(&pointer);
Destroy_Bitmap(&cpanel);
Destroy_Bitmap(&canvas);

// shutdown directdraw
DD_Shutdown();

// return success
return(1);
} // end Game_Shutdown

///////////////////////////////////////////////////////////

int Game_Main(void *parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!

int index; // looping var

// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || KEY_DOWN(VK_SPACE))
    PostMessage(main_window_handle, WM_DESTROY,0,0);

// start the timing clock
Start_Clock();

// clear the drawing surface
DD_Fill_Surface(lpddsback, 0);

// get the input from the mouse
lpdimouse->GetDeviceState(sizeof(DIMOUSESTATE), (LPVOID)&mouse_state);

// move the mouse cursor
mouse_x+=(mouse_state.lX);
mouse_y+=(mouse_state.lY);

// test bounds

// first x boundaries
if (mouse_x >= screen_width)
   mouse_x = screen_width-1;
else
if (mouse_x < 0)
   mouse_x = 0;

// now the y boundaries
if (mouse_y >= screen_height)
   mouse_y= screen_height-1;
else
if (mouse_y < 0)
   mouse_y = 0;

// position the pointer bob to the mouse coords
pointer.x = mouse_x;
pointer.y = mouse_y;

// test what the user is doing with the mouse
if ((mouse_x > 3) && (mouse_x < 500-3) &&
    (mouse_y > 3) && (mouse_y < SCREEN_HEIGHT-3))
   {
   // mouse is within canvas region

   // if left button is down then draw
   if (mouse_state.rgbButtons[0])
      {
      // test drawing mode
      if (buttons_state[BUTTON_PENCIL])
         {
         // draw a pixel
         Draw_Pixel(mouse_x, mouse_y, mouse_color, canvas.buffer, canvas.width);
         Draw_Pixel(mouse_x+1, mouse_y, mouse_color, canvas.buffer, canvas.width);
         Draw_Pixel(mouse_x, mouse_y+1, mouse_color, canvas.buffer, canvas.width);
         Draw_Pixel(mouse_x+1, mouse_y+1, mouse_color, canvas.buffer, canvas.width);
         }
      else
         {
         // draw spray
         for (index=0; index<10; index++)
             {
             // get next particle
             int sx=mouse_x-8+rand()%16;
             int sy=mouse_y-8+rand()%16;

             // make sure particle is in bounds
             if (sx > 0 && sx < 500 && sy > 0 && sy < screen_height)
                Draw_Pixel(sx, sy, mouse_color, canvas.buffer, canvas.width);
             } // end for index

         } // end else

      } // end if left button
    else // right button is eraser
    if (mouse_state.rgbButtons[1])
       {
       // test drawing mode
       if (buttons_state[BUTTON_PENCIL])
          {
          // erase a pixel
          Draw_Pixel(mouse_x, mouse_y, 0, canvas.buffer, canvas.width);
          Draw_Pixel(mouse_x+1, mouse_y, 0, canvas.buffer, canvas.width);
          Draw_Pixel(mouse_x, mouse_y+1, 0, canvas.buffer, canvas.width);
          Draw_Pixel(mouse_x+1, mouse_y+1, 0, canvas.buffer, canvas.width);
          } // end if
       else
          {
          // erase spray
          for (index=0; index<20; index++)
              {
              // get next particle
              int sx=mouse_x-8+rand()%16;
              int sy=mouse_y-8+rand()%16;

              // make sure particle is in bounds
              if (sx > 0 && sx < 500 && sy > 0 && sy < screen_height)
                 Draw_Pixel(sx, sy, 0, canvas.buffer, canvas.width);
              } // end for index

          } // end else

       } // end if left button

   } // end if
else
if ( (mouse_x > 500+16) && (mouse_x < 500+16+8*9) &&
     (mouse_y > 8)      && (mouse_y < 8+32*9))
   {
   // within palette

   // test if button left button is down
   if (mouse_state.rgbButtons[0])
      {
      // see what color cell user is pointing to
      int cell_x = (mouse_x - (500+16))/9;
      int cell_y = (mouse_y - (8))/9;

      // change color
      mouse_color = cell_x + cell_y*8;

      } // end if
   } // end if
else
if ((mouse_x > 500) && (mouse_x < (500+100)) &&
    (mouse_y > 344) && (mouse_y < (383+34)) )
   {
   // within button area
   // test for each button
   for (index=0; index<4; index++)
       {
       if ((mouse_x > buttons_x[index]) && (mouse_x < (buttons_x[index]+32)) &&
           (mouse_y > buttons_y[index]) && (mouse_y < (buttons_y[index]+34)) )
           break;

       } // end for

   // at this point we know where the user is, now determine what he
   // is doing with the buttons
   switch(index)
         {
         case BUTTON_SPRAY:
             {
             // if left button is down simply activate spray mode
             if (mouse_state.rgbButtons[0])
                {
                // depress button
                buttons_state[index] = 1;

               // de-activate pencil mode
                buttons_state[BUTTON_PENCIL] = 0;
                } // end if
             else
                {
                // make sure button is up
                // buttons_state[index] = 0;
                } // end else

             } break;

         case BUTTON_PENCIL:
             {
             // if left button is down activate spray mode
             if (mouse_state.rgbButtons[0])
                {
                // depress button
                buttons_state[index] = 1;

                // de-activate spray mode
                buttons_state[BUTTON_SPRAY] = 0;

                } // end if
             else
                {
                // make sure button is up
                // buttons_state[index] = 0;
                } // end else

             } break;

         case BUTTON_ERASE:
             {
             // test if left button is down, if so clear screen
             if (mouse_state.rgbButtons[0])
                {
                // clear memory
                memset(canvas.buffer,0,canvas.width*canvas.height);

                // depress button
                buttons_state[index] = 1;
                } // end if
             else
                {
                // make sure button is up
                buttons_state[index] = 0;
                } // end else
             } break;

         case BUTTON_EXIT:
             {
             // test if left button down, if so bail
             if (mouse_state.rgbButtons[0])
                  PostMessage(main_window_handle, WM_DESTROY,0,0);

             } break;

         } // end switch

   } // end if
else
   {
   // no mans land

   } // end else

// lock back buffer
DD_Lock_Back_Surface();

// draw the canvas
Draw_Bitmap(&canvas, back_buffer, back_lpitch,0);

// draw control panel
Draw_Bitmap(&cpanel,back_buffer,back_lpitch,0);

// unlock back buffer
DD_Unlock_Back_Surface();

// draw the color palette
for (int col=0; col < 256; col++)
    {
    Draw_Rectangle(500+16+(col%8)*9,   8+(col/8)*9,
                   500+16+(col%8)*9+8, 8+(col/8)*9+8,
                   col,lpddsback);

    } // end for col

// draw the current color selected
Draw_Rectangle(533,306,533+34,306+34,mouse_color,lpddsback);

// draw the buttons
for (index=0; index<4; index++)
    {
    // set position of button bob
    buttons.x = buttons_x[index];
    buttons.y = buttons_y[index];

    // now select the on/off frame based on if the
    // button is off
    if (buttons_state[index]==0)
        buttons.curr_frame = index;
    else // button is on
        buttons.curr_frame = index+4;

    // draw the button
    Draw_BOB(&buttons, lpddsback);

    } // end for index

// display coords
sprintf(buffer,"(%d,%d)",mouse_x,mouse_y);
Draw_Text_GDI(buffer, 520,450,RGB(0,255,0),lpddsback);
Draw_Text_GDI("Painting For Dummies!",0,0,RGB(255,255,45),lpddsback);

// draw the cursor last
Draw_BOB(&pointer,lpddsback);

// flip the surfaces
DD_Flip();

// sync to 3o fps
Wait_Clock(30);


// return success
return(1);

} // end Game_Main

//////////////////////////////////////////////////////////