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- /*
- * SetROP2
- * setrop2.c
- *
- * This program demonstrates the use of the function SetROP2.
- * It sets the current drawing mode of the display context. GDI uses the
- * drawing mode to combine pens and interior of filled objects with color
- * already on the display surface. The mode specifies how the color of
- * the pen or interior and the color already on the display surface are
- * combined to yield a new color. In this program, a rectangle is drawn on
- * the client area with different drawing mode. It will show how the pen
- * (which is used to draw the border) and the brush (which is used to fill
- * the rectangle) combine with the color already on the screen.
- *
- */
-
- #include "windows.h"
-
- /* Procedure called when the application is loaded for the first time */
- BOOL WinInit( hInstance )
- HANDLE hInstance;
- {
- WNDCLASS wcClass;
-
- /* registering the parent window class */
- wcClass.hCursor = LoadCursor( NULL, IDC_ARROW );
- wcClass.hIcon = LoadIcon (hInstance, (LPSTR)"WindowIcon");
- wcClass.lpszMenuName = (LPSTR)NULL;
- wcClass.lpszClassName = (LPSTR)"Setrop2";
- wcClass.hbrBackground = (HBRUSH)GetStockObject( LTGRAY_BRUSH );
- wcClass.hInstance = hInstance;
- wcClass.style = CS_HREDRAW | CS_VREDRAW;
- wcClass.lpfnWndProc = DefWindowProc;
- wcClass.cbClsExtra = 0;
- wcClass.cbWndExtra = 0;
-
- RegisterClass( (LPWNDCLASS)&wcClass );
- return TRUE; /* Initialization succeeded */
- }
-
-
- int PASCAL WinMain( hInstance, hPrevInstance, lpszCmdLine, cmdShow )
- HANDLE hInstance, hPrevInstance;
- LPSTR lpszCmdLine;
- int cmdShow;
- {
- HWND hWnd; /* Handle to the parent window */
- HDC hDC; /* Display context of client area */
- MSG msg; /* Window messages */
-
- WinInit (hInstance);
-
- hWnd = CreateWindow((LPSTR)"Setrop2",
- (LPSTR)"Setting Drawing Mode",
- WS_OVERLAPPEDWINDOW,
- 50, /* x */
- 50, /* y */
- 600, /* width */
- 250, /* height */
- (HWND)NULL, /* no parent */
- (HMENU)NULL, /* use class menu */
- (HANDLE)hInstance, /* handle to window instance */
- (LPSTR)NULL /* no params to pass on */
- );
-
- /* Make window visible according to the way the app is activated */
- ShowWindow( hWnd, cmdShow );
- UpdateWindow( hWnd );
-
- /* Get a DC before writing to the client area */
- hDC = GetDC (hWnd);
-
- /* Using the default drawing mode of R2_COPYPEN from the display
- * context, where the pixel is the color of the pen and brush,
- * regardless of what is on the screen
- */
- Rectangle (hDC, 50, 50, 150, 100);
- MessageBox (hWnd, (LPSTR)"The ROP2 is R2_COPYPEN", (LPSTR)"R2_COPYPEN", MB_OK);
-
- /* The pixel is always white with R2_WHITE */
- SetROP2 (hDC, R2_WHITE);
- Rectangle (hDC, 60, 60, 160, 110);
- MessageBox (hWnd, (LPSTR)"The ROP2 is R2_WHITE", (LPSTR)"R2_WHITE", MB_OK);
-
- /* The pixel is a combination of colors in the pen/brush and display,
- * but not in both witj R2_XORPEN
- */
- SetROP2 (hDC, R2_XORPEN);
- Rectangle (hDC, 70, 70, 170, 120);
- MessageBox (hWnd, (LPSTR)"The ROP2 is R2_XORPEN", (LPSTR)"R2_XORPEN", MB_OK);
-
- /* The pixel is the inverse of the display color with R2_NOT */
- SetROP2 (hDC, R2_NOT);
- Rectangle (hDC, 80, 80, 180, 130);
- MessageBox (hWnd, (LPSTR)"The ROP2 is R2_NOT", (LPSTR)"R2_NOT", MB_OK);
-
- /* return the display context when everything is done */
- ReleaseDC (hWnd, hDC);
-
- /* Window message loop */
- while (GetMessage ((LPMSG)&msg, NULL, 0, 0))
- {
- TranslateMessage ((LPMSG)&msg);
- DispatchMessage ((LPMSG)&msg);
- }
-
- return (int)msg.wParam;
- }
-