Stupid Graphics!

[SteveCRM]

Okay this is getting really annoying....I've been trying for so long to get graphics to work. and they still won't 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!

[parksie]

I hate WM_PAINT Ooh that rhymes

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

[SteveCRM]

I've only really tried resource...

[abdul]

#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;
}

[parksie]

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....

[SteveCRM]

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