reactos/rosapps/tests/bitblt/bitblt.c

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