Persistent background image plugin

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@1627 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/BgImage/BgImage.cpp

@@ -0,0 +1,213 @@
+#include <Windows.h>
+#include <Mmsystem.h>
+#include "exdll.h"
+
+int x, y;
+char temp[MAX_PATH];
+HBITMAP hBitmap;
+HWND hWndImage;
+
+HINSTANCE g_hInstance;
+
+void *oldProc;
+LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
+int myatoi(char *s);
+extern "C" void __declspec(dllexport) SetImage(HWND hwndParent, int string_size, char *variables, stack_t **stacktop);
+
+extern "C" void __declspec(dllexport) Init(HWND hwndParent, int string_size, char *variables, stack_t **stacktop) {
+  SetImage(hwndParent, string_size, variables, stacktop);
+
+  WNDCLASSEX wc = {
+    sizeof(WNDCLASSEX),
+    CS_VREDRAW|CS_HREDRAW,
+    WndProc,
+    0,
+    0,
+    g_hInstance,
+    LoadIcon(GetModuleHandle(0), MAKEINTRESOURCE(103)),
+    0,
+    (HBRUSH)GetStockObject(WHITE_BRUSH),
+    0,
+    "NSISBGImage",
+    0
+  };
+  if (!RegisterClassEx(&wc)) {
+    pushstring("can't register class");
+    return;
+  }
+
+  hWndImage = CreateWindowEx(
+    WS_EX_TOOLWINDOW,
+    "NSISBGImage",
+    0,
+    WS_VISIBLE,
+    (GetSystemMetrics(SM_CXSCREEN)-x)/2,
+    (GetSystemMetrics(SM_CYSCREEN)-y)/2,
+    x,
+    y,
+    0,
+    0,
+    g_hInstance,
+    0
+  );
+  if (!hWndImage) {
+    pushstring("can't create window");
+    return;
+  }
+
+  SetWindowLong(hWndImage, GWL_STYLE, WS_VISIBLE);
+
+  oldProc = (void *)SetWindowLong(g_hwndParent, GWL_WNDPROC, (long)WndProc);
+}
+
+extern "C" void __declspec(dllexport) SetImage(HWND hwndParent, int string_size, char *variables, stack_t **stacktop) {
+  EXDLL_INIT();
+
+  popstring(temp);
+  if (!lstrcmp(temp, "/FILLSCREEN")) {
+    x = GetSystemMetrics(SM_CXSCREEN);
+    y = GetSystemMetrics(SM_CYSCREEN);
+    popstring(temp);
+  }
+  else x = y = 0;
+
+  BITMAP bitmap;
+
+  if (hBitmap) DeleteObject((HGDIOBJ)hBitmap);
+  hBitmap = (HBITMAP)LoadImage(0, temp, IMAGE_BITMAP, x, y, LR_LOADFROMFILE);
+  if (!hBitmap) {
+    pushstring("can't load bitmap");
+    return;
+  }
+
+  GetObject(hBitmap, sizeof(bitmap), (LPSTR)&bitmap);
+  x = x ? x : bitmap.bmWidth;
+  y = y ? y : bitmap.bmHeight;
+
+  if (hWndImage) {
+    SetWindowPos(
+      hWndImage,
+      g_hwndParent,
+      (GetSystemMetrics(SM_CXSCREEN)-x)/2,
+      (GetSystemMetrics(SM_CYSCREEN)-y)/2,
+      x,
+      y,
+      SWP_NOACTIVATE
+    );
+    RedrawWindow(hWndImage, 0, 0, RDW_INVALIDATE);
+  }
+}
+
+extern "C" void __declspec(dllexport) Destroy(HWND hwndParent, int string_size, char *variables, stack_t **stacktop) {
+  SendMessage(hWndImage, WM_CLOSE, 0, 0);
+}
+
+extern "C" void __declspec(dllexport) Sound(HWND hwndParent, int string_size, char *variables, stack_t **stacktop) {
+  g_stacktop=stacktop;
+  popstring(temp);
+  PlaySound(temp, 0, SND_ASYNC|SND_FILENAME|SND_NODEFAULT);
+}
+
+BOOL WINAPI _DllMainCRTStartup(HINSTANCE hInst, ULONG ul_reason_for_call, LPVOID lpReserved) {
+  g_hInstance=hInst;
+  return TRUE;
+}
+
+int myatoi(char *s)
+{
+  unsigned int v=0;
+  if (*s == '0' && (s[1] == 'x' || s[1] == 'X'))
+  {
+    s+=2;
+    for (;;)
+    {
+      int c=*s++;
+      if (c >= '0' && c <= '9') c-='0';
+      else if (c >= 'a' && c <= 'f') c-='a'-10;
+      else if (c >= 'A' && c <= 'F') c-='A'-10;
+      else break;
+      v<<=4;
+      v+=c;
+    }
+  }
+  else if (*s == '0' && s[1] <= '7' && s[1] >= '0')
+  {
+    s++;
+    for (;;)
+    {
+      int c=*s++;
+      if (c >= '0' && c <= '7') c-='0';
+      else break;
+      v<<=3;
+      v+=c;
+    }
+  }
+  else
+  {
+    int sign=0;
+    if (*s == '-') { s++; sign++; }
+    for (;;)
+    {
+      int c=*s++ - '0';
+      if (c < 0 || c > 9) break;
+      v*=10;
+      v+=c;
+    }
+    if (sign) return -(int) v;
+  }
+  return (int)v;
+}
+
+LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
+  if (hWndImage && hwnd != hWndImage) {
+    if (message == WM_WINDOWPOSCHANGED) {
+      LPWINDOWPOS wp = (LPWINDOWPOS) lParam;
+      if (!(wp->flags & SWP_NOZORDER)) {
+        CallWindowProc(
+          (long (__stdcall *)(struct HWND__ *,unsigned int,unsigned int,long))oldProc,
+          hwnd,
+          message,
+          wParam,
+          lParam
+        );
+        SetWindowPos(hWndImage, g_hwndParent, 0, 0, 0, 0, SWP_NOACTIVATE|SWP_NOMOVE|SWP_NOSIZE);
+        return 0;
+      }
+    }
+    return CallWindowProc(
+      (long (__stdcall *)(struct HWND__ *,unsigned int,unsigned int,long))oldProc,
+      hwnd,
+      message,
+      wParam,
+      lParam
+    );
+  }
+  switch (message) {
+    case WM_PAINT:
+      {
+        PAINTSTRUCT ps;
+        HDC hdc = BeginPaint(hwnd, &ps);
+        HDC cdc = CreateCompatibleDC(hdc);
+        HGDIOBJ hOldObject = SelectObject(cdc, hBitmap);
+        RECT cRect;
+        GetClientRect(hwnd, &cRect);
+        BitBlt(hdc, cRect.left, cRect.top, cRect.right - cRect.left, cRect.bottom - cRect.top, cdc, 0, 0, SRCCOPY);
+        SelectObject(cdc, hOldObject);
+        DeleteDC(cdc);
+        EndPaint(hwnd, &ps);
+      }
+      break;
+    case WM_WINDOWPOSCHANGING:
+      {
+        LPWINDOWPOS wp = (LPWINDOWPOS) lParam;
+        wp->flags |= SWP_NOACTIVATE;
+        wp->hwndInsertAfter = g_hwndParent;
+        break;
+      }
+    case WM_DESTROY:
+      SetWindowLong(g_hwndParent, GWL_WNDPROC, (long)oldProc);
+    default:
+      return DefWindowProc(hwnd, message, wParam, lParam);
+  }
+  return 0;
+}