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/* gcc -g -Wall -o layer.exe layer.c -lgdi32 */
#define _WIN32_WINNT 0x0500
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
typedef struct BITMAPINFO_GDI BITMAPINFO_GDI;
struct BITMAPINFO_GDI
{
BITMAPINFOHEADER bih;
DWORD masks[3];
};
LRESULT CALLBACK _window_procedure(HWND window,
UINT message,
WPARAM window_param,
LPARAM data_param);
HINSTANCE layer_instance;
HWND layer_window;
HDC layer_dc;
HBITMAP layer_bitmap;
void *layer_data;
int layer_init()
{
WNDCLASS wc;
layer_instance = GetModuleHandle(NULL);
if (!layer_instance)
return 0;
memset (&wc, 0, sizeof (WNDCLASS));
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = _window_procedure;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = layer_instance;
wc.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor (NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(1 + COLOR_BTNFACE);
wc.lpszMenuName = NULL;
wc.lpszClassName = "Class";
if(!RegisterClass(&wc))
{
FreeLibrary(layer_instance);
return 0;
}
return 1;
}
void layer_shutdown()
{
FreeLibrary(layer_instance);
}
int layer_window_new(int x, int y, int w, int h)
{
RECT rect;
DWORD style;
BITMAPINFO_GDI bitmap_info;
style = WS_OVERLAPPEDWINDOW | WS_SIZEBOX;
rect.left = 0;
rect.top = 0;
rect.right = w;
rect.bottom = h;
if (!AdjustWindowRect(&rect, style, FALSE))
return 0;
layer_window = CreateWindowEx(WS_EX_LAYERED,
"Class", "Test",
style,
x, y,
rect.right - rect.left,
rect.bottom - rect.top,
NULL,
NULL, layer_instance, NULL);
if (!layer_window)
return 0;
layer_dc = GetDC(layer_window);
if (!layer_dc)
{
DestroyWindow(layer_window);
return 0;
}
bitmap_info.bih.biSize = sizeof(BITMAPINFOHEADER);
bitmap_info.bih.biWidth = w;
bitmap_info.bih.biHeight = -h;
bitmap_info.bih.biPlanes = 1;
bitmap_info.bih.biSizeImage = 4 * w * h;
bitmap_info.bih.biXPelsPerMeter = 0;
bitmap_info.bih.biYPelsPerMeter = 0;
bitmap_info.bih.biClrUsed = 0;
bitmap_info.bih.biClrImportant = 0;
bitmap_info.bih.biBitCount = 32;
bitmap_info.bih.biCompression = BI_RGB;
bitmap_info.masks[0] = 0x00ff0000;
bitmap_info.masks[1] = 0x0000ff00;
bitmap_info.masks[2] = 0x000000ff;
layer_bitmap = CreateDIBSection(layer_dc,
(const BITMAPINFO *)&bitmap_info,
DIB_RGB_COLORS,
(void **)(&layer_data),
NULL,
0);
ShowWindow(layer_window, SW_SHOWNORMAL);
UpdateWindow(layer_window);
return 1;
}
void
layer_window_free()
{
DeleteObject(layer_bitmap);
ReleaseDC(layer_window, layer_dc);
DestroyWindow(layer_window);
}
void layer_paint()
{
int i, j, *tmp;
HDC dc;
tmp = layer_data;
for (j = 0; j < 200; j++)
for (i = 0; i < 200; i++, tmp++)
*tmp = 0x000000ff;
dc = CreateCompatibleDC(layer_dc);
if (!dc)
return;
SelectObject(dc, layer_bitmap);
/* POINT dest; */
/* POINT src = {0, 0}; */
/* SIZE client = { 200, 200 }; */
/* BLENDFUNCTION bf = {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA}; */
/* ClientToScreen(layer_window, &dest); */
/* UpdateLayeredWindow(layer_window, layer_dc, &dest, &client, */
/* dc, &src, 0, &bf, ULW_ALPHA); */
BitBlt(layer_dc,
0, 0,
200, 200,
dc,
0, 0,
SRCCOPY);
DeleteDC(dc);
}
int main()
{
if (!layer_init())
return EXIT_FAILURE;
if (!layer_window_new(10, 10, 200, 200))
{
layer_shutdown();
return EXIT_FAILURE;
}
/* msg loop */
while(1)
{
MSG msg;
BOOL ret;
ret = PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
if (ret)
{
do
{
if (msg.message == WM_QUIT)
goto beach;
TranslateMessage(&msg);
DispatchMessageW(&msg);
} while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE));
}
}
beach:
layer_window_free();
layer_shutdown();
return EXIT_SUCCESS;
}
LRESULT CALLBACK
_window_procedure(HWND window,
UINT message,
WPARAM window_param,
LPARAM data_param)
{
switch (message)
{
case WM_CLOSE:
PostQuitMessage(0);
return 0;
/* GDI notifications */
case WM_PAINT:
{
RECT rect;
printf("paint\n");
if (GetUpdateRect(window, &rect, FALSE))
{
PAINTSTRUCT ps;
HDC hdc;
hdc = BeginPaint(window, &ps);
layer_paint();
EndPaint(window, &ps);
}
return 0;
}
default:
return DefWindowProc(window, message, window_param, data_param);
}
} |
fenetre qui ne s'affiche pas si j'utilise WS_EX_LAYERED
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