backport bug 92017 - Support very large Image on Windows platform
see also Bug 139556
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Image.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Image.java
index dfbdef7..71e1fdc 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Image.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Image.java
@@ -1354,6 +1354,18 @@
type = SWT.BITMAP;
int hDC = device.internal_new_GC(null);
handle = OS.CreateCompatibleBitmap(hDC, width, height);
+ /*
+ * Feature in Windows. CreateCompatibleBitmap() may fail
+ * for large images. The fix is to create a DIB section
+ * in that case.
+ */
+ if (handle == 0) {
+ int bits = OS.GetDeviceCaps(hDC, OS.BITSPIXEL);
+ int planes = OS.GetDeviceCaps(hDC, OS.PLANES);
+ int depth = bits * planes;
+ if (depth < 16) depth = 16;
+ handle = createDIB(width, height, depth);
+ }
if (handle != 0) {
int memDC = OS.CreateCompatibleDC(hDC);
int hOldBitmap = OS.SelectObject(memDC, handle);
@@ -1367,6 +1379,42 @@
}
}
+static int createDIB(int width, int height, int depth) {
+ BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
+ bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
+ bmiHeader.biWidth = width;
+ bmiHeader.biHeight = -height;
+ bmiHeader.biPlanes = 1;
+ bmiHeader.biBitCount = (short)depth;
+ if (OS.IsWinCE) bmiHeader.biCompression = OS.BI_BITFIELDS;
+ else bmiHeader.biCompression = OS.BI_RGB;
+ byte[] bmi = new byte[BITMAPINFOHEADER.sizeof + (OS.IsWinCE ? 12 : 0)];
+ OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
+ /* Set the rgb colors into the bitmap info */
+ if (OS.IsWinCE) {
+ int redMask = 0xFF00;
+ int greenMask = 0xFF0000;
+ int blueMask = 0xFF000000;
+ /* big endian */
+ int offset = BITMAPINFOHEADER.sizeof;
+ bmi[offset] = (byte)((redMask & 0xFF000000) >> 24);
+ bmi[offset + 1] = (byte)((redMask & 0xFF0000) >> 16);
+ bmi[offset + 2] = (byte)((redMask & 0xFF00) >> 8);
+ bmi[offset + 3] = (byte)((redMask & 0xFF) >> 0);
+ bmi[offset + 4] = (byte)((greenMask & 0xFF000000) >> 24);
+ bmi[offset + 5] = (byte)((greenMask & 0xFF0000) >> 16);
+ bmi[offset + 6] = (byte)((greenMask & 0xFF00) >> 8);
+ bmi[offset + 7] = (byte)((greenMask & 0xFF) >> 0);
+ bmi[offset + 8] = (byte)((blueMask & 0xFF000000) >> 24);
+ bmi[offset + 9] = (byte)((blueMask & 0xFF0000) >> 16);
+ bmi[offset + 10] = (byte)((blueMask & 0xFF00) >> 8);
+ bmi[offset + 11] = (byte)((blueMask & 0xFF) >> 0);
+ }
+
+ int[] pBits = new int[1];
+ return OS.CreateDIBSection(0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0);
+}
+
/**
* Feature in WinCE. GetIconInfo is not available in WinCE.
* The workaround is to cache the object ImageData for images
