add native draw bitmap with alpha mask

core/fxge/ifx_renderdevicedriver.cpp

Index: core/fxge/ifx_renderdevicedriver.cpp
diff --git a/core/fxge/ifx_renderdevicedriver.cpp b/core/fxge/ifx_renderdevicedriver.cpp
index 9b7f985aee0d6dd113f19fafa3ab6faf16e43011..25c3a4a23c24863e4def765afacaac812957191e 100644
--- a/core/fxge/ifx_renderdevicedriver.cpp
+++ b/core/fxge/ifx_renderdevicedriver.cpp
@@ -92,3 +92,12 @@ FX_BOOL IFX_RenderDeviceDriver::DrawShading(const CPDF_ShadingPattern* pPattern,
                                             FX_BOOL bAlphaMode) {
   return false;
 }
+
+bool IFX_RenderDeviceDriver::SetBitsWithMask(const CFX_DIBSource* pBitmap,
+                                             const CFX_DIBSource* pMask,
+                                             int left,
+                                             int top,
+                                             int bitmap_alpha,
+                                             int blend_type) {
+  return false;
+}