[ios] Fix clipped bounds calculation for gradients

Fixes software-mansion#738
msand · Sep 1, 2018 · 11a5752 · 11a5752
1 parent a1097b8
commit 11a5752
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Showing 5 changed files with 18 additions and 16 deletions.
diff --git a/ios/Brushes/RNSVGBrush.h b/ios/Brushes/RNSVGBrush.h
@@ -35,6 +35,6 @@
  * be clipped.
  * @abstract
  */
-- (void)paint:(CGContextRef)context opacity:(CGFloat)opacity painter:(RNSVGPainter *)painter;
+- (void)paint:(CGContextRef)context opacity:(CGFloat)opacity painter:(RNSVGPainter *)painter bounds:(CGRect)bounds;
 
 @end
diff --git a/ios/Brushes/RNSVGPainter.h b/ios/Brushes/RNSVGPainter.h
@@ -14,7 +14,7 @@
 
 - (instancetype)initWithPointsArray:(NSArray<NSString *> *)pointsArray NS_DESIGNATED_INITIALIZER;
 
-- (void)paint:(CGContextRef)context;
+- (void)paint:(CGContextRef)context bounds:(CGRect)bounds;
 
 - (void)setUnits:(RNSVGUnits)unit;
 

diff --git a/ios/Brushes/RNSVGPainter.m b/ios/Brushes/RNSVGPainter.m
@@ -66,20 +66,20 @@ - (void)setRadialGradientColors:(NSArray<NSNumber *> *)colors
     _colors = colors;
 }
 
-- (void)paint:(CGContextRef)context
+- (void)paint:(CGContextRef)context bounds:(CGRect)bounds
 {
     if (_type == kRNSVGLinearGradient) {
-        [self paintLinearGradient:context];
+        [self paintLinearGradient:context bounds:(CGRect)bounds];
     } else if (_type == kRNSVGRadialGradient) {
-        [self paintRidialGradient:context];
+        [self paintRidialGradient:context bounds:(CGRect)bounds];
     } else if (_type == kRNSVGPattern) {
         // todo:
     }
 }
 
-- (CGRect)getPaintRect:(CGContextRef)context
+- (CGRect)getPaintRect:(CGContextRef)context bounds:(CGRect)bounds
 {
-    CGRect rect = _useObjectBoundingBox ? CGContextGetClipBoundingBox(context) : _userSpaceBoundingBox;
+    CGRect rect = _useObjectBoundingBox ? bounds : _userSpaceBoundingBox;
     float height = CGRectGetHeight(rect);
     float width = CGRectGetWidth(rect);
     float x = 0.0;
@@ -93,13 +93,13 @@ - (CGRect)getPaintRect:(CGContextRef)context
     return CGRectMake(x, y, width, height);
 }
 
-- (void)paintLinearGradient:(CGContextRef)context
+- (void)paintLinearGradient:(CGContextRef)context bounds:(CGRect)bounds
 {
 
     CGGradientRef gradient = CGGradientRetain([RCTConvert RNSVGCGGradient:_colors offset:0]);
     CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
 
-    CGRect rect = [self getPaintRect:context];
+    CGRect rect = [self getPaintRect:context bounds:bounds];
     float height = CGRectGetHeight(rect);
     float width = CGRectGetWidth(rect);
     float offsetX = CGRectGetMinX(rect);
@@ -124,12 +124,12 @@ - (void)paintLinearGradient:(CGContextRef)context
     CGGradientRelease(gradient);
 }
 
-- (void)paintRidialGradient:(CGContextRef)context
+- (void)paintRidialGradient:(CGContextRef)context bounds:(CGRect)bounds
 {
     CGGradientRef gradient = CGGradientRetain([RCTConvert RNSVGCGGradient:_colors offset:0]);
     CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
 
-    CGRect rect = [self getPaintRect:context];
+    CGRect rect = [self getPaintRect:context bounds:bounds];
     float height = CGRectGetHeight(rect);
     float width = CGRectGetWidth(rect);
     float offsetX = CGRectGetMinX(rect);

diff --git a/ios/Brushes/RNSVGPainterBrush.m b/ios/Brushes/RNSVGPainterBrush.m
@@ -21,22 +21,22 @@ - (instancetype)initWithArray:(NSArray *)array
                         self.class, NSStringFromSelector(_cmd), array);
             return nil;
         }
-        
+
         self.brushRef = [array objectAtIndex:1];
     }
     return self;
 }
 
-- (void)paint:(CGContextRef)context opacity:(CGFloat)opacity painter:(RNSVGPainter *)painter
+- (void)paint:(CGContextRef)context opacity:(CGFloat)opacity painter:(RNSVGPainter *)painter bounds:(CGRect)bounds
 {
     BOOL transparency = opacity < 1;
     if (transparency) {
         CGContextSetAlpha(context, opacity);
         CGContextBeginTransparencyLayer(context, NULL);
     }
-    
-    [painter paint:context];
-    
+
+    [painter paint:context bounds:(CGRect)bounds];
+
     if (transparency) {
         CGContextEndTransparencyLayer(context);
     }

diff --git a/ios/RNSVGRenderable.m b/ios/RNSVGRenderable.m
@@ -211,6 +211,7 @@ - (void)renderLayerTo:(CGContextRef)context rect:(CGRect)rect
             [self.fill paint:context
                      opacity:self.fillOpacity
                      painter:[self.svgView getDefinedPainter:self.fill.brushRef]
+                      bounds:pathBounding
              ];
             CGContextRestoreGState(context);
 
@@ -256,6 +257,7 @@ - (void)renderLayerTo:(CGContextRef)context rect:(CGRect)rect
             [self.stroke paint:context
                        opacity:self.strokeOpacity
                        painter:[self.svgView getDefinedPainter:self.stroke.brushRef]
+                        bounds:pathBounding
              ];
             return;
         }