fix: apply opacity to currentColor for fill and stroke on Apple platforms

When currentColor is used as a fill or stroke brush, the fillOpacity and
strokeOpacity values were ignored because the color was passed directly
without applying the opacity multiplier. This creates a copy of the color
with the correct alpha using CGColorCreateCopyWithAlpha.

Author: davor-bauk-sh

apple/Brushes/RNSVGContextBrush.mm

@@ -49,7 +49,10 @@ - (BOOL)applyFillColor:(CGContextRef)context opacity:(CGFloat)opacity
   BOOL fillColor;
 
   if (brush.class == RNSVGBrush.class) {
-    CGContextSetFillColorWithColor(context, [element getCurrentColor]);
+    CGColorRef currentColor = [element getCurrentColor];
+    CGColorRef colorWithOpacity = CGColorCreateCopyWithAlpha(currentColor, opacity * CGColorGetAlpha(currentColor));
+    CGContextSetFillColorWithColor(context, colorWithOpacity);
+    CGColorRelease(colorWithOpacity);
     fillColor = YES;
   } else {
     fillColor = [brush applyFillColor:context opacity:opacity];
@@ -70,7 +73,10 @@ - (BOOL)applyStrokeColor:(CGContextRef)context opacity:(CGFloat)opacity
   BOOL strokeColor;
 
   if (brush.class == RNSVGBrush.class) {
-    CGContextSetStrokeColorWithColor(context, [element getCurrentColor]);
+    CGColorRef currentColor = [element getCurrentColor];
+    CGColorRef colorWithOpacity = CGColorCreateCopyWithAlpha(currentColor, opacity * CGColorGetAlpha(currentColor));
+    CGContextSetStrokeColorWithColor(context, colorWithOpacity);
+    CGColorRelease(colorWithOpacity);
     strokeColor = YES;
   } else {
     strokeColor = [brush applyStrokeColor:context opacity:opacity];

apple/RNSVGRenderable.mm

@@ -555,7 +555,11 @@ - (void)renderLayerTo:(CGContextRef)context rect:(CGRect)rect
 
   if (self.fill) {
     if (self.fill.class == RNSVGBrush.class) {
-      CGContextSetFillColorWithColor(context, [self getCurrentColor]);
+      CGColorRef currentColor = [self getCurrentColor];
+      CGColorRef colorWithOpacity =
+          CGColorCreateCopyWithAlpha(currentColor, self.fillOpacity * CGColorGetAlpha(currentColor));
+      CGContextSetFillColorWithColor(context, colorWithOpacity);
+      CGColorRelease(colorWithOpacity);
       fillColor = YES;
     } else {
       fillColor = [self.fill applyFillColor:context opacity:self.fillOpacity];
@@ -603,7 +607,11 @@ - (void)renderLayerTo:(CGContextRef)context rect:(CGRect)rect
     BOOL strokeColor;
 
     if (self.stroke.class == RNSVGBrush.class) {
-      CGContextSetStrokeColorWithColor(context, [self getCurrentColor]);
+      CGColorRef currentColor = [self getCurrentColor];
+      CGColorRef colorWithOpacity =
+          CGColorCreateCopyWithAlpha(currentColor, self.strokeOpacity * CGColorGetAlpha(currentColor));
+      CGContextSetStrokeColorWithColor(context, colorWithOpacity);
+      CGColorRelease(colorWithOpacity);
       strokeColor = YES;
     } else {
       strokeColor = [self.stroke applyStrokeColor:context opacity:self.strokeOpacity];

apple/Text/RNSVGTSpan.mm

@@ -134,8 +134,10 @@ - (void)renderLayerTo:(CGContextRef)context rect:(CGRect)rect
     if (self.inlineSize != nil && self.inlineSize.value != 0) {
       if (self.fill) {
         if (self.fill.class == RNSVGBrush.class) {
-          CGColorRef color = [self getCurrentColor];
+          CGColorRef currentColor = [self getCurrentColor];
+          CGColorRef color = CGColorCreateCopyWithAlpha(currentColor, self.fillOpacity * CGColorGetAlpha(currentColor));
           [self drawWrappedText:context gc:gc rect:rect color:color];
+          CGColorRelease(color);
         } else {
           CGColorRef color = [self.fill getColorWithOpacity:self.fillOpacity];
           [self drawWrappedText:context gc:gc rect:rect color:color];
@@ -144,8 +146,11 @@ - (void)renderLayerTo:(CGContextRef)context rect:(CGRect)rect
       }
       if (self.stroke) {
         if (self.stroke.class == RNSVGBrush.class) {
-          CGColorRef color = [self getCurrentColor];
+          CGColorRef currentColor = [self getCurrentColor];
+          CGColorRef color =
+              CGColorCreateCopyWithAlpha(currentColor, self.strokeOpacity * CGColorGetAlpha(currentColor));
           [self drawWrappedText:context gc:gc rect:rect color:color];
+          CGColorRelease(color);
         } else {
           CGColorRef color = [self.stroke getColorWithOpacity:self.strokeOpacity];
           [self drawWrappedText:context gc:gc rect:rect color:color];