fix codex warnings

Change-Id: I5bd29e3e033c99b808f57f7e23c76b06a86c9216

frameworks/common/screen.cpp

@@ -43,6 +43,7 @@ bool Screen::GetCurrentScreenBitmap(ImageInfo& info)
     info.header.compressMode = 0;
 
     if (!ScreenDeviceProxy::GetInstance()->GetScreenBitmapBuffer(screenBitmapBuffer, info.dataSize)) {
+        ImageCacheFree(info);
         return false;
     }
     info.data = screenBitmapBuffer;

frameworks/components/ui_view.cpp

@@ -22,6 +22,7 @@
 #include "draw/draw_utils.h"
 #include "gfx_utils/graphic_log.h"
 #include "gfx_utils/mem_api.h"
+#include "securec.h"
 #include "themes/theme_manager.h"
 
 namespace OHOS {
@@ -829,8 +830,8 @@ bool UIView::GetBitmap(ImageInfo& bitmap)
     rect_.SetPosition(0, 0);
     Rect mask = GetRect();
     mask.Intersect(mask, screenRect);
-    uint16_t bufferWidth = mask.GetWidth();
-    uint16_t bufferHeight = mask.GetHeight();
+    uint16_t bufferWidth = static_cast<uint16_t>(mask.GetWidth());
+    uint16_t bufferHeight = static_cast<uint16_t>(mask.GetHeight());
     bitmap.header.colorMode = ScreenDeviceProxy::GetInstance()->GetBufferMode();
     bitmap.dataSize = bufferWidth * bufferHeight * DrawUtils::GetByteSizeByColorMode(bitmap.header.colorMode);
     bitmap.header.width = bufferWidth;
@@ -844,6 +845,10 @@ bool UIView::GetBitmap(ImageInfo& bitmap)
         rect_.SetPosition(tempX, tempY);
         return false;
     }
+    if (memset_s(viewBitmapBuffer, bitmap.dataSize, 0, bitmap.dataSize) != EOK) {
+        ImageCacheFree(bitmap);
+        return false;
+    }
     ScreenDeviceProxy::GetInstance()->EnableBitmapBuffer(viewBitmapBuffer);
     ScreenDeviceProxy::GetInstance()->SetViewBitmapBufferWidth(bufferWidth);
     RootView::GetInstance()->DrawTop(this, mask);

frameworks/dock/screen_device_proxy.cpp

@@ -129,6 +129,9 @@ bool ScreenDeviceProxy::GetScreenBitmapBuffer(uint8_t* dest, uint32_t size)
         return false;
     }
     uint8_t* buf = GetBuffer();
+    if (buf == nullptr) {
+        return false;
+    }
     if (memcpy_s(dest, size, buf, bufSize) != EOK) {
         return false;
     }