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/**
* Copyright: Mike Wey 2011
* License: zlib (See accompanying LICENSE file)
* Authors: Mike Wey
*/
module dmagick.internal.Windows;
import core.sys.windows.windows;
import dmagick.Image;
import dmagick.Exception;
import dmagick.Geometry;
class Window
{
Image image;
Image[] imageList;
size_t index;
int height;
int width;
WNDCLASS wndclass;
HINSTANCE hInstance;
BITMAPINFO bmi; // bitmap header
HWND hwnd;
MSG msg;
static Window[HWND] windows;
/**
* Create an window foe displaying an image.
*/
this(Image image)
{
this.image = image;
height = cast(int)image.rows;
width = cast(int)image.columns;
hInstance = cast(HINSTANCE) GetModuleHandleA(null);
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = &WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIconA(null, IDI_APPLICATION);
wndclass.hCursor = LoadCursorA(null, IDC_ARROW);
wndclass.hbrBackground = null;
wndclass.lpszMenuName = null;
wndclass.lpszClassName = "DMagick";
if (!RegisterClassA(&wndclass))
throw new DMagickException("Displaying images requires Windows NT!");
RECT rect = RECT(0,0, width,height);
AdjustWindowRect(&rect, WS_CAPTION | WS_SYSMENU, false);
hwnd = CreateWindowA("DMagick", "DMagick", WS_CAPTION | WS_SYSMENU,
CW_USEDEFAULT, CW_USEDEFAULT, rect.right-rect.left, rect.bottom-rect.top,
null, null, hInstance, null);
// setup bitmap info
bmi.bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
bmi.bmiHeader.biWidth = width;
bmi.bmiHeader.biHeight = -height; // must be inverted so Y axis is at top
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32; // four 8-bit components
bmi.bmiHeader.biCompression = BI_RGB;
bmi.bmiHeader.biSizeImage = width * height * 4;
windows[hwnd] = this;
}
/**
* Create an window foe displaying an animation
* or a collection of images.
*/
this(Image[] images)
{
this(images[0]);
imageList = images;
index = 0;
}
/**
* Open the window and display the image.
*/
void display()
{
ShowWindow(hwnd, SW_SHOWNORMAL);
UpdateWindow(hwnd);
if ( imageList !is null )
{
UINT delay = cast(UINT)image.animationDelay.total!"msecs"();
if ( delay == 0 )
delay = 1000;
SetTimer(hwnd, 0, delay, null);
}
while (GetMessageA(&msg, null, 0, 0))
{
TranslateMessage(&msg);
DispatchMessageA(&msg);
}
}
extern(Windows) nothrow static LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
try
{
switch (message)
{
case WM_ERASEBKGND: // don't redraw bg
return 1;
case WM_PAINT:
windows[hwnd].draw();
return 0;
case WM_TIMER:
windows[hwnd].nextFrame();
return 0;
case WM_DESTROY:
windows[hwnd] = null;
PostQuitMessage(0);
return 0;
default:
}
}
catch(Exception e){}
return DefWindowProcA(hwnd, message, wParam, lParam);
}
/**
* Draw the image on the window.
*/
void draw()
{
HDC hdc; // handle of the DC we will create
HDC hdcwnd; // DC for the window
HBITMAP hbitmap; // bitmap handle
PAINTSTRUCT ps;
VOID* pvBits; // pointer to DIB section
ULONG ulWindowWidth, ulWindowHeight; // window width/height
RECT rt; // used for getting window dimensions
// get window dimensions
GetClientRect(hwnd, &rt);
// calculate window width/height
ulWindowWidth = rt.right - rt.left;
ulWindowHeight = rt.bottom - rt.top;
// make sure we have at least some window size
if (ulWindowWidth < 1 || ulWindowHeight < 1)
return;
// Get DC for window
hdcwnd = BeginPaint(hwnd, &ps);
// create a DC for our bitmap -- the source DC for BitBlt
hdc = CreateCompatibleDC(hdcwnd);
// create our DIB section and select the bitmap into the dc
hbitmap = CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, &pvBits, null, 0x0);
SelectObject(hdc, hbitmap);
enum channels = "BGRA"; // win32 uses BGR(A)
Geometry area = Geometry(width, height);
byte[] arr = (cast(byte*)pvBits)[0 .. (area.width * area.height) * channels.length];
image.exportPixels(area, arr, channels);
BitBlt(hdcwnd, 0, 0, width, height, hdc, 0, 0, SRCCOPY);
DeleteObject(hbitmap);
DeleteDC(hdc);
EndPaint(hwnd, &ps);
}
/**
* Setup the next frame, and invalidate the window so its repainted.
*/
void nextFrame()
{
if (++index == imageList.length)
index = 0;
image = imageList[index];
UINT delay = cast(UINT)image.animationDelay.total!"msecs"();
if ( delay == 0 )
delay = 1000;
SetTimer(hwnd, 0, delay, null);
InvalidateRect(hwnd,null,false);
}
}
pragma(lib, "gdi32.lib");
const AC_SRC_OVER = 0x00;
const AC_SRC_ALPHA = 0x01;
enum DWORD BI_RGB = 0;
enum UINT DIB_RGB_COLORS = 0;
extern(Windows) BOOL BitBlt(HDC, int, int, int, int, HDC, int, int, DWORD);
extern(Windows) HBITMAP CreateCompatibleBitmap(HDC, int, int);
extern(Windows) HBITMAP CreateDIBSection(HDC, const(BITMAPINFO)*, UINT, void**, HANDLE, DWORD);
extern(Windows) UINT_PTR SetTimer(HWND, UINT_PTR, UINT, TIMERPROC);
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