From c8a8bb5af4efaa004bb04a960d9d82739a88dc40 Mon Sep 17 00:00:00 2001
From: Hermet Park <hermet@lottiefiles.com>
Date: Fri, 27 Oct 2023 11:30:23 +0900
Subject: [PATCH] renderer/paint: added a blend update flag.

Keep track of the update changes accurately.
We can utilize this value change in the backend engine.
---
 src/renderer/tvgPaint.cpp | 5 ++++-
 src/renderer/tvgRender.h  | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/renderer/tvgPaint.cpp b/src/renderer/tvgPaint.cpp
index 5af63c6d..9b5e338a 100644
--- a/src/renderer/tvgPaint.cpp
+++ b/src/renderer/tvgPaint.cpp
@@ -457,7 +457,10 @@ uint32_t Paint::identifier() const noexcept
 
 Result Paint::blend(BlendMethod method) const noexcept
 {
-    pImpl->blendMethod = method;
+    if (pImpl->blendMethod != method) {
+        pImpl->blendMethod = method;
+        pImpl->renderFlag |= RenderUpdateFlag::Blend;
+    }
 
     return Result::Success;
 }
diff --git a/src/renderer/tvgRender.h b/src/renderer/tvgRender.h
index cd3f4f3f..6c0a7d5f 100644
--- a/src/renderer/tvgRender.h
+++ b/src/renderer/tvgRender.h
@@ -32,7 +32,7 @@ namespace tvg
 using RenderData = void*;
 using pixel_t = uint32_t;
 
-enum RenderUpdateFlag : uint8_t {None = 0, Path = 1, Color = 2, Gradient = 4, Stroke = 8, Transform = 16, Image = 32, GradientStroke = 64, All = 255};
+enum RenderUpdateFlag : uint8_t {None = 0, Path = 1, Color = 2, Gradient = 4, Stroke = 8, Transform = 16, Image = 32, GradientStroke = 64, Blend = 128, All = 255};
 
 struct Surface;