Changeset 348

Timestamp:

Nov 24, 2009, 3:28:53 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

gui/image: Implemented QPixmap::grabWindow().

File:

• trunk/src/gui/image/qpixmap_pm.cpp (modified) (1 diff)

trunk/src/gui/image/qpixmap_pm.cpp

@@ -393 +393 @@
 }
 
-QPixmap QPixmap::grabWindow(WId winId, int x, int y, int w, int h )
-{
-    // @todo implement
-    return QPixmap();
+QPixmap QPixmap::grabWindow(WId winId, int x, int y, int w, int h)
+{
+    QPixmap pm;
+
+    if (w == 0 || h == 0)
+        return pm;
+
+    RECTL rcl;
+    if (!WinQueryWindowRect(winId, &rcl))
+        return pm;
+
+    if (w < 0)
+        w = rcl.xRight;
+    if (h < 0)
+        h = rcl.yTop;
+
+    // flip y coordinate
+    y = rcl.yTop - (y + h);
+
+    HPS hps = qt_alloc_mem_ps(w, h);
+    if (hps == NULLHANDLE)
+        return pm;
+
+    HBITMAP hbm = NULLHANDLE;
+
+    // bitmap header + 2 palette entries (for the mask)
+    BITMAPINFOHEADER2 bmh;
+    bmh.cbFix = sizeof(BITMAPINFOHEADER2);
+
+    // create the uninitialized bitmap to hold window pixels
+    bmh.cx = w;
+    bmh.cy = h;
+    bmh.cPlanes = 1;
+    bmh.cBitCount = 32;
+    hbm = GpiCreateBitmap(hps, &bmh, 0, 0, 0);
+
+    if (hbm != NULLHANDLE) {
+        GpiSetBitmap(hps, hbm);
+        HPS hpsWin = WinGetPS(winId);
+        if (hpsWin != NULLHANDLE) {
+            POINTL pnts[] = { {0, 0}, {w, h}, {x, y} };
+            if (GpiBitBlt(hps, hpsWin, 3, pnts,
+                          ROP_SRCCOPY, BBO_IGNORE) != GPI_ERROR) {
+                GpiSetBitmap(hps, NULLHANDLE);
+                pm = fromPmHBITMAP(hbm);
+            }
+            WinReleasePS(hpsWin);
+        }
+        GpiDeleteBitmap(hbm);
+    }
+
+    qt_free_mem_ps(hps);
+
+    return pm;
 }