showimg.c File Reference

#include <windows.h>
#include <stdio.h>

Include dependency graph for showimg.c:

Go to the source code of this file.

Functions
static LRESULT CALLBACK	WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
static ATOM	MyRegisterClass (HINSTANCE hInstance)
static BOOL	InitInstance (HINSTANCE hInstance, int nCmdShow)
int WINAPI	wWinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)

Variables
WCHAR	szWindowClass [] = L"testclass"

Function Documentation

InitInstance()

static BOOL InitInstance ( HINSTANCE  hInstance, int  nCmdShow  )

static

Definition at line 104 of file showimg.c.

{
    HWND hWnd;
 
    hWnd = CreateWindowEx(0,
                          szWindowClass,
                          L"Bmp test",
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT,
                          CW_USEDEFAULT,
                          300,
                          120,
                          NULL,
                          NULL,
                          hInstance,
                          NULL);
 
    if (!hWnd)
        return FALSE;
 
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);
 
    return TRUE;
}

Referenced by wWinMain().

MyRegisterClass()

static ATOM MyRegisterClass ( HINSTANCE  hInstance )

static

Definition at line 81 of file showimg.c.

{
    WNDCLASSEX wcex;
 
    wcex.cbSize = sizeof(WNDCLASSEX);
 
    wcex.style         = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc   = WndProc;
    wcex.cbClsExtra    = 0;
    wcex.cbWndExtra    = 0;
    wcex.hInstance     = hInstance;
    wcex.hIcon         = NULL;
    wcex.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName  = NULL;
    wcex.lpszClassName = szWindowClass;
    wcex.hIconSm       = NULL;
 
    return RegisterClassEx(&wcex);
}

Referenced by wWinMain().

WndProc()

static LRESULT CALLBACK WndProc ( HWND  hWnd, UINT  message, WPARAM  wParam, LPARAM  lParam  )

static

Definition at line 9 of file showimg.c.

{
    static HBITMAP hBmp;
    HANDLE handle;
    CHAR buffer[32];
 
    switch (message)
    {
        case WM_CREATE:
        {
            handle = LoadLibraryExW(L"image.dll", NULL, LOAD_LIBRARY_AS_DATAFILE);
            sprintf(buffer, "%p", handle);
            MessageBoxA(NULL, buffer, "handle", 0);
            hBmp = (HBITMAP)LoadImage(handle, MAKEINTRESOURCE(130), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
            sprintf(buffer, "%p", hBmp);
            MessageBoxA(NULL, buffer, "Bmp", 0);
            sprintf(buffer, "%ld", GetLastError());
            MessageBoxA(NULL, buffer, "LastError", 0);
            break;
        }
 
        case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc, hdcMem;
            BITMAP bitmap;
            BITMAPINFO bmi;
            hdc = BeginPaint(hWnd, &ps);
            HGLOBAL hMem;
            LPVOID lpBits;
 
            hdcMem = CreateCompatibleDC(hdc);
            SelectObject(hdcMem, hBmp);
            GetObject(hBmp, sizeof(BITMAP), &bitmap);
 
            memset(&bmi, 0, sizeof(bmi));
            bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
            bmi.bmiHeader.biWidth       = bitmap.bmWidth;
            bmi.bmiHeader.biHeight      = bitmap.bmHeight;
            bmi.bmiHeader.biPlanes      = bitmap.bmPlanes;
            bmi.bmiHeader.biBitCount    = bitmap.bmBitsPixel;
            bmi.bmiHeader.biCompression = BI_RGB;
            bmi.bmiHeader.biSizeImage   = 0;
 
            hMem = GlobalAlloc(GMEM_MOVEABLE, ((bitmap.bmWidth *
                bmi.bmiHeader.biBitCount + 31) / 32) * 4 * bitmap.bmHeight);
            lpBits = GlobalLock(hMem);
            GetDIBits(hdc, hBmp, 0, bitmap.bmHeight, lpBits, &bmi, DIB_RGB_COLORS);
 
            // increasing the multiplier makes the image larger
            StretchDIBits(hdc, 0, 0, bitmap.bmWidth * 3, bitmap.bmHeight * 3, 0, 0,
                bitmap.bmWidth, bitmap.bmHeight,lpBits, &bmi, DIB_RGB_COLORS, SRCCOPY);
            GlobalUnlock(hMem);
            GlobalFree(hMem);
 
            DeleteDC(hdcMem);
 
            EndPaint(hWnd, &ps);
            break;
        }
 
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

Referenced by MyRegisterClass().

wWinMain()

int WINAPI wWinMain	(	HINSTANCE	hInstance,
		HINSTANCE	hPrevInstance,
		LPTSTR	lpCmdLine,
		int	nCmdShow
	)

Definition at line 131 of file showimg.c.

{
    MSG msg;
 
    MyRegisterClass(hInstance);
 
    if (!InitInstance(hInstance, nCmdShow))
        return FALSE;
 
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
 
    return (int)msg.wParam;
}

Variable Documentation

szWindowClass

WCHAR szWindowClass[] = L"testclass"

Definition at line 6 of file showimg.c.

Referenced by InitInstance(), and MyRegisterClass().