capi: added pointer validation

diff --git a/src/bindings/capi/thorvg_capi.h b/src/bindings/capi/thorvg_capi.h
index 3e65a12..b675865 100644 (file)
--- a/src/bindings/capi/thorvg_capi.h
+++ b/src/bindings/capi/thorvg_capi.h
@@ -777,7 +777,7 @@ TVG_EXPORT Tvg_Result tvg_paint_translate(Tvg_Paint* paint, float x, float y);
 *
 * \return Tvg_Result enumeration.
 * \retval TVG_RESULT_SUCCESS Succeed.
-* \retval TVG_RESULT_INVALID_ARGUMENT An invalid Tvg_Paint pointer.
+* \retval TVG_RESULT_INVALID_ARGUMENT A @c nullptr is passed as the argument.
 * \retval TVG_RESULT_FAILED_ALLOCATION An internal error with memory allocation.
 */
 TVG_EXPORT Tvg_Result tvg_paint_transform(Tvg_Paint* paint, const Tvg_Matrix* m);

diff --git a/src/bindings/capi/tvgCapi.cpp b/src/bindings/capi/tvgCapi.cpp
index f0d99ba..245d47c 100644 (file)
--- a/src/bindings/capi/tvgCapi.cpp
+++ b/src/bindings/capi/tvgCapi.cpp
@@ -166,7 +166,7 @@ TVG_EXPORT Tvg_Result tvg_paint_translate(Tvg_Paint* paint, float x, float y)
 
 TVG_EXPORT Tvg_Result tvg_paint_transform(Tvg_Paint* paint, const Tvg_Matrix* m)
 {
-    if (!paint) return TVG_RESULT_INVALID_ARGUMENT;
+    if (!paint || !m) return TVG_RESULT_INVALID_ARGUMENT;
     return (Tvg_Result) reinterpret_cast<Paint*>(paint)->transform(*(reinterpret_cast<const Matrix*>(m)));
 }