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140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
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/*
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* Windows 2000 Graphics API Black Book
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* (BitBlt Bitmap Rendering Demo)
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*
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* Created by Damon Chandler <dmc27@ee.cornell.edu>
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* Updates can be downloaded at: <www.coriolis.com>
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*
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* Please do not hesistate to e-mail me at dmc27@ee.cornell.edu
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* if you have any questions about this code.
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*/
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#include <windows.h>
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#include <string.h>
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HINSTANCE HInst;
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const char* WndClassName = "GMainWnd";
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LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
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LPARAM LParam);
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int APIENTRY WinMain(HINSTANCE HInstance, HINSTANCE HPrevInstance,
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LPTSTR lpCmdLine, int nCmdShow)
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{
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WNDCLASS wc;
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MSG msg;
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HInst = HInstance;
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memset(&wc, 0, sizeof(WNDCLASS));
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wc.style = CS_VREDRAW | CS_HREDRAW | CS_DBLCLKS;
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wc.lpfnWndProc = MainWndProc;
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wc.hInstance = HInstance;
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wc.hCursor = LoadCursor(NULL, (LPCTSTR)IDC_ARROW);
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/* wc.hbrBackground = reinterpret_cast<HBRUSH>(COLOR_BTNFACE + 1); */
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wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
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wc.lpszClassName = WndClassName;
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if (RegisterClass(&wc))
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{
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HWND HWnd =
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CreateWindow(
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WndClassName, TEXT("BitBlt Bitmap Rendering Demo"),
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WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION |
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WS_VISIBLE | WS_CLIPSIBLINGS,
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0, 0, 220, 230,
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NULL, NULL, HInst, NULL
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);
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if (HWnd)
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{
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ShowWindow(HWnd, nCmdShow);
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UpdateWindow(HWnd);
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while (GetMessage(&msg, NULL, 0, 0))
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{
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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}
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}
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return 0;
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}
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/* image related */
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BITMAP bmp;
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LPCSTR filename = TEXT("lena.bmp");
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HDC HMemDC = NULL;
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HBITMAP HOldBmp = NULL;
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LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
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LPARAM LParam)
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{
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switch (Msg)
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{
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case WM_CREATE:
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{
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/* create a memory DC */
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HMemDC = CreateCompatibleDC(NULL);
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if (HMemDC)
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{
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/* load a bitmap from file */
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HBITMAP HBmp =
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/* static_cast<HBITMAP> */(
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LoadImage(HInst, filename, IMAGE_BITMAP,
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0, 0, LR_LOADFROMFILE)
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);
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if (HBmp)
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{
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/* extract dimensions of the bitmap */
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GetObject(HBmp, sizeof(BITMAP), &bmp);
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/* associate the bitmap with the memory DC */
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/* HOldBmp = static_cast<HBITMAP> */
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(SelectObject(HMemDC, HBmp)
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);
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}
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}
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}
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case WM_PAINT:
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{
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PAINTSTRUCT ps;
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const HDC Hdc = BeginPaint(HWnd, &ps);
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#if 0
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try
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#endif
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{
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/* TODO: add palette support (see Chapter 9)... */
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BitBlt(Hdc, 20, 15,
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bmp.bmWidth, bmp.bmHeight,
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HMemDC, 0, 0,
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SRCCOPY);
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}
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#if 0
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catch (...)
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#endif
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{
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EndPaint(HWnd, &ps);
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}
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EndPaint(HWnd, &ps);
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break;
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}
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case WM_DESTROY:
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{
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/* clean up */
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DeleteObject(SelectObject(HMemDC, HOldBmp));
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DeleteDC(HMemDC);
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PostQuitMessage(0);
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return 0;
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}
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}
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return DefWindowProc(HWnd, Msg, WParam, LParam);
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}
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