Stupid Graphics!

Okay this is getting really annoying....I've been trying for so long to get graphics to work. and they still won't :mad: Can someone give me an example? Preferably having it redraw during WM_PAINT.....every tme I try I either get errors or just nothing happens.....All I want to do is show a bitmap!

I hate WM_PAINT :) Ooh that rhymes :p

Are you trying to display a bitmap from a file, or from a resource?

I've only really tried resource...

Code:

---


#include <windows.h>
#include "resource.h"
static char g_szClassName[] = "MyWindowClass";
static HINSTANCE hinst = NULL;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

HWND hwnd;
PAINTSTRUCT ps;
HDC hdc, memhdc;
HBITMAP mybmp;
BITMAP bm;

//MYBMP is a bitmap in the resource file

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
  LPSTR lpCmdLine, int nCmdShow)
{
  WNDCLASSEX WndClass;
  MSG Msg;

  hinst = hInstance;

  mybmp = LoadBitmap(hinst, MAKEINTRESOURCE(MYBMP));

  WndClass.cbSize        = sizeof(WNDCLASSEX);
  WndClass.style        = CS_HREDRAW | CS_VREDRAW;
  WndClass.lpfnWndProc  = WndProc;
  WndClass.cbClsExtra    = 0;
  WndClass.cbWndExtra    = 0;
  WndClass.hInstance    = hinst;
  WndClass.hIcon        = LoadIcon(NULL, IDI_APPLICATION);
  WndClass.hCursor      = LoadCursor(NULL, IDC_ARROW);
  WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
  WndClass.lpszMenuName  = NULL;
  WndClass.lpszClassName = g_szClassName;
  WndClass.hIconSm      = LoadIcon(NULL, IDI_APPLICATION);

  if(!RegisterClassEx(&WndClass))
  {
      MessageBox(0, "Window Registration Failed! :(", "Error!",
        MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
      return 0;
  }

  hwnd = CreateWindowEx(
      NULL,
      g_szClassName,
      "Coloured Shapes Generator",
      WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, CW_USEDEFAULT, 320, 240,
      NULL, NULL, hinst, NULL);

  if(hwnd == NULL)
  {
      MessageBox(0, "Window Creation Failed! :(", "Error!",
        MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
      return 0;
  }


  ShowWindow(hwnd, nCmdShow);
  UpdateWindow(hwnd);

  while(GetMessage(&Msg, NULL, 0, 0))
  {
      TranslateMessage(&Msg);
      DispatchMessage(&Msg);
  }
  return Msg.wParam;
}






LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wparam, LPARAM lparam)
{
       
  switch(Message)
  {
  case WM_PAINT:
          hdc = BeginPaint(hwnd, &ps);
          memhdc = CreateCompatibleDC(hdc);
          SelectObject(memhdc, mybmp);
          //Draws the bitmap on the memory DC

          GetObject(mybmp, sizeof(bm), &bm);

          //Gets the info about the bitmap and stores that in "bm"
          BitBlt(hdc, 0,0, bm.bmWidth, bm.bmHeight, memhdc, 0,0, SRCCOPY);

          //Draws the bitmap on the window from the memory DC

          DeleteDC(memhdc);
          EndPaint(hwnd, &ps);

          return 0;
 
      case WM_CLOSE:
                  DeleteObject(mybmp);
        DestroyWindow(hwnd);
      break;
      case WM_DESTROY:
        PostQuitMessage(0);
      break;
      default:
        return DefWindowProc(hwnd, Message, wparam, lparam);
  }
  return 0;
}

---

:p

Oops...forgot to say we solved it on MSN :(

The code was basically identical apart from I had the window procedure first in the file ;) Hee hee....

Yeah sorry forgot to mention that....sorry I left and didn't think about posting...Im on my grandparents computer now with 32 megs RAM!!!! IM GOING NUTS!


Thanks Guys :D :D :D