Add more bitmap func

bitmap/goBitmap.h

@@ -28,6 +28,32 @@
 #include <assert.h>
 #include <stdio.h>
 
+/* Returns false and sets error if |bitmap| is NULL. */
+bool bitmap_ready(MMBitmapRef bitmap){
+	if (bitmap == NULL || bitmap->imageBuffer == NULL) {
+		return false;
+	}
+	return true;
+}
+
+void bitmap_dealloc(MMBitmapRef bitmap){
+	if (bitmap != NULL) {
+		destroyMMBitmap(bitmap);
+		bitmap = NULL;
+	}
+}
+
+bool bitmap_copy_to_pboard(MMBitmapRef bitmap){
+	MMPasteError err;
+
+	if (!bitmap_ready(bitmap)) return false;
+	if ((err = copyMMBitmapToPasteboard(bitmap)) != kMMPasteNoError) {
+		return false;
+	}
+
+	return true;
+}
+
 MMPoint aFindBitmap(MMBitmapRef bit_map, MMRect rect){
 	// MMRect rect;
 	// rect.size.width = 10;

robotgo.go

@@ -644,6 +644,20 @@ func FreeBitmap(ref C.MMBitmapRef) {
 	C.destroyMMBitmap(ref)
 }
 
+// ReadBitmap returns false and sets error if |bitmap| is NULL
+func ReadBitmap(bitmap C.MMBitmapRef) bool {
+	abool := C.bitmap_ready(bitmap)
+	gbool := bool(abool)
+	return gbool
+}
+
+// CopyBitpb copy bitmap to pasteboard
+func CopyBitpb(bitmap C.MMBitmapRef) bool {
+	abool := C.bitmap_copy_to_pboard(bitmap)
+	gbool := bool(abool)
+	return gbool
+}
+
 /*
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