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- /*------------------------------------------------
- SHOWDIB6.C -- Display DIB with palette indices
- (c) Charles Petzold, 1998
- ------------------------------------------------*/
-
- #include <windows.h>
- #include "..\\ShowDib3\\PackeDib.h"
- #include "resource.h"
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- TCHAR szAppName[] = TEXT ("ShowDib6") ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = szAppName ;
- wndclass.lpszClassName = szAppName ;
-
- if (!RegisterClass (&wndclass))
- {
- MessageBox (NULL, TEXT ("This program requires Windows NT!"),
- szAppName, MB_ICONERROR) ;
- return 0 ;
- }
-
- hwnd = CreateWindow (szAppName, TEXT ("Show DIB #6: Palette Indices"),
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- 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)
- {
- static BITMAPINFO * pPackedDib ;
- static HPALETTE hPalette ;
- static int cxClient, cyClient ;
- static OPENFILENAME ofn ;
- static TCHAR szFileName [MAX_PATH], szTitleName [MAX_PATH] ;
- static TCHAR szFilter[] = TEXT ("Bitmap Files (*.BMP)\0*.bmp\0")
- TEXT ("All Files (*.*)\0*.*\0\0") ;
- HDC hdc ;
- int i, iNumColors ;
- PAINTSTRUCT ps ;
- WORD * pwIndex ;
-
- switch (message)
- {
- case WM_CREATE:
- ofn.lStructSize = sizeof (OPENFILENAME) ;
- ofn.hwndOwner = hwnd ;
- ofn.hInstance = NULL ;
- ofn.lpstrFilter = szFilter ;
- ofn.lpstrCustomFilter = NULL ;
- ofn.nMaxCustFilter = 0 ;
- ofn.nFilterIndex = 0 ;
- ofn.lpstrFile = szFileName ;
- ofn.nMaxFile = MAX_PATH ;
- ofn.lpstrFileTitle = szTitleName ;
- ofn.nMaxFileTitle = MAX_PATH ;
- ofn.lpstrInitialDir = NULL ;
- ofn.lpstrTitle = NULL ;
- ofn.Flags = 0 ;
- ofn.nFileOffset = 0 ;
- ofn.nFileExtension = 0 ;
- ofn.lpstrDefExt = TEXT ("bmp") ;
- ofn.lCustData = 0 ;
- ofn.lpfnHook = NULL ;
- ofn.lpTemplateName = NULL ;
-
- return 0 ;
-
- case WM_SIZE:
- cxClient = LOWORD (lParam) ;
- cyClient = HIWORD (lParam) ;
- return 0 ;
-
- case WM_COMMAND:
- switch (LOWORD (wParam))
- {
- case IDM_FILE_OPEN:
-
- // Show the File Open dialog box
-
- if (!GetOpenFileName (&ofn))
- return 0 ;
-
- // If there's an existing packed DIB, free the memory
-
- if (pPackedDib)
- {
- free (pPackedDib) ;
- pPackedDib = NULL ;
- }
-
- // If there's an existing logical palette, delete it
-
- if (hPalette)
- {
- DeleteObject (hPalette) ;
- hPalette = NULL ;
- }
-
- // Load the packed DIB into memory
-
- SetCursor (LoadCursor (NULL, IDC_WAIT)) ;
- ShowCursor (TRUE) ;
-
- pPackedDib = PackedDibLoad (szFileName) ;
-
- ShowCursor (FALSE) ;
- SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
-
- if (pPackedDib)
- {
- // Create the palette from the DIB color table
-
- hPalette = PackedDibCreatePalette (pPackedDib) ;
-
- // Replace DIB color table with indices
-
- if (hPalette)
- {
- iNumColors = PackedDibGetNumColors (pPackedDib) ;
- pwIndex = (WORD *)
- PackedDibGetColorTablePtr (pPackedDib) ;
-
- for (i = 0 ; i < iNumColors ; i++)
- pwIndex[i] = (WORD) i ;
- }
- }
- else
- {
- MessageBox (hwnd, TEXT ("Cannot load DIB file"),
- szAppName, 0) ;
- }
- InvalidateRect (hwnd, NULL, TRUE) ;
- return 0 ;
- }
- break ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
-
- if (hPalette)
- {
- SelectPalette (hdc, hPalette, FALSE) ;
- RealizePalette (hdc) ;
- }
-
- if (pPackedDib)
- SetDIBitsToDevice (hdc,
- 0,
- 0,
- PackedDibGetWidth (pPackedDib),
- PackedDibGetHeight (pPackedDib),
- 0,
- 0,
- 0,
- PackedDibGetHeight (pPackedDib),
- PackedDibGetBitsPtr (pPackedDib),
- pPackedDib,
- DIB_PAL_COLORS) ;
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_QUERYNEWPALETTE:
- if (!hPalette)
- return FALSE ;
-
- hdc = GetDC (hwnd) ;
- SelectPalette (hdc, hPalette, FALSE) ;
- RealizePalette (hdc) ;
- InvalidateRect (hwnd, NULL, TRUE) ;
-
- ReleaseDC (hwnd, hdc) ;
- return TRUE ;
-
- case WM_PALETTECHANGED:
- if (!hPalette || (HWND) wParam == hwnd)
- break ;
-
- hdc = GetDC (hwnd) ;
- SelectPalette (hdc, hPalette, FALSE) ;
- RealizePalette (hdc) ;
- UpdateColors (hdc) ;
-
- ReleaseDC (hwnd, hdc) ;
- break ;
-
-
- case WM_DESTROY:
- if (pPackedDib)
- free (pPackedDib) ;
-
- if (hPalette)
- DeleteObject (hPalette) ;
-
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-
-