From 7c06fdd7b1838149f2b6169536b0f0591f7d824f Mon Sep 17 00:00:00 2001
From: Hermet Park <hermet@lottiefiles.com>
Date: Sat, 19 Oct 2024 20:30:41 +0900
Subject: [PATCH] sw_engine: fixed linear gradient filling masking.

properly filtering alpha channel of the 8bits linear gradient
masking drawing.

issue: https://github.com/thorvg/thorvg/issues/2204
---
 src/renderer/sw_engine/tvgSwFill.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/renderer/sw_engine/tvgSwFill.cpp b/src/renderer/sw_engine/tvgSwFill.cpp
index d02986f9..d8b73184 100644
--- a/src/renderer/sw_engine/tvgSwFill.cpp
+++ b/src/renderer/sw_engine/tvgSwFill.cpp
@@ -622,7 +622,7 @@ void fillLinear(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32
         auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
         auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
         for (uint32_t j = 0; j < len; ++j, ++dst) {
-            auto src = MULTIPLY(_fixedPixel(fill, t2), a);
+            auto src = MULTIPLY(A(_fixedPixel(fill, t2)), a);
             *dst = maskOp(src, *dst, ~src);
             t2 += inc2;
         }
@@ -630,7 +630,7 @@ void fillLinear(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32
     } else {
         uint32_t counter = 0;
         while (counter++ < len) {
-            auto src = MULTIPLY(_pixel(fill, t / GRADIENT_STOP_SIZE), a);
+            auto src = MULTIPLY(A(_pixel(fill, t / GRADIENT_STOP_SIZE)), a);
             *dst = maskOp(src, *dst, ~src);
             ++dst;
             t += inc;