Fix some CIFilter implementation

Author: dreampiggy

SDWebImage/Core/UIImage+Transform.m

@@ -659,7 +659,9 @@ - (nullable UIImage *)sd_tintedImageWithColor:(nonnull UIColor *)tintColor blend
                 } else {
                     clearColor = [[CIColor alloc] initWithColor:UIColor.clearColor];
                 }
-                ciImage = [CIImage imageWithColor:clearColor];
+                colorImage = [CIImage imageWithColor:clearColor];
+                colorImage = [colorImage imageByCroppingToRect:ciImage.extent];
+                ciImage = colorImage;
             } else if (blendMode == kCGBlendModeCopy) {
                 // R = S
                 ciImage = colorImage;
@@ -675,12 +677,14 @@ - (nullable UIImage *)sd_tintedImageWithColor:(nonnull UIColor *)tintColor blend
             } else if (blendMode == kCGBlendModePlusDarker) {
                 // R = MAX(0, (1 - D) + (1 - S))
                 // (1 - D)
-                CIFilter *filter1 = [CIFilter filterWithName:@"CIColorInvert"];
+                CIFilter *filter1 = [CIFilter filterWithName:@"CIColorControls"];
                 [filter1 setValue:ciImage forKey:kCIInputImageKey];
+                [filter1 setValue:@(-0.5) forKey:kCIInputBrightnessKey];
                 ciImage = filter1.outputImage;
                 // (1 - S)
-                CIFilter *filter2 = [CIFilter filterWithName:@"CIColorInvert"];
+                CIFilter *filter2 = [CIFilter filterWithName:@"CIColorControls"];
                 [filter2 setValue:colorImage forKey:kCIInputImageKey];
+                [filter2 setValue:@(-0.5) forKey:kCIInputBrightnessKey];
                 colorImage = filter2.outputImage;
                 // +
                 CIFilter *filter = [CIFilter filterWithName:@"CIAdditionCompositing"];

Tests/Tests/SDImageTransformerTests.m

@@ -243,7 +243,7 @@ - (void)test06UIImageTransformTintWithImage:(UIImage *)testImage {
     UIColor *topCenterColor = [tintedImage sd_colorAtPoint:CGPointMake(150, 20)];
     expect([topCenterColor.sd_hexString isEqualToString:[UIColor blackColor].sd_hexString]).beTruthy();
 
-    UIImage *tintedSourceInImage = [testImage sd_tintedImageWithColor:tintColor blendMode:kCGBlendModeSourceOut];
+    UIImage *tintedSourceInImage = [testImage sd_tintedImageWithColor:tintColor blendMode:kCGBlendModeSourceIn];
     centerColor = [tintedSourceInImage sd_colorAtPoint:CGPointMake(150, 150)];
     expect([centerColor.sd_hexString isEqualToString:[UIColor blackColor].sd_hexString]).beTruthy();
 }