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89 lines
1.8 KiB
Objective-C
89 lines
1.8 KiB
Objective-C
#import "PGWarmthTool.h"
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@interface PGWarmthTool ()
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{
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PGPhotoProcessPassParameter *_parameter;
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}
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@end
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@implementation PGWarmthTool
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- (instancetype)init
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{
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self = [super init];
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if (self != nil)
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{
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_identifier = @"warmth";
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_type = PGPhotoToolTypeShader;
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_order = 11;
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_minimumValue = -100;
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_maximumValue = 100;
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_defaultValue = 0;
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self.value = @(_defaultValue);
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}
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return self;
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}
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- (NSString *)title
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{
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return TGLocalized(@"PhotoEditor.WarmthTool");
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}
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- (UIImage *)image
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{
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return [UIImage imageNamed:@"PhotoEditorWarmthTool"];
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}
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- (bool)shouldBeSkipped
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{
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return (ABS(((NSNumber *)self.displayValue).floatValue - self.defaultValue) < FLT_EPSILON);
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}
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- (NSArray *)parameters
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{
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if (!_parameters)
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{
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_parameter = [PGPhotoProcessPassParameter parameterWithName:@"warmth" type:@"lowp float"];
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_parameters = @[ _parameter ];
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}
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return _parameters;
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}
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- (void)updateParameters
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{
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NSNumber *value = (NSNumber *)self.displayValue;
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CGFloat parameterValue = value.floatValue / 100.0f;
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[_parameter setFloatValue:parameterValue];
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}
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- (NSString *)shaderString
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{
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return PGShaderString
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(
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if (abs(warmth) > toolEpsilon) {
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highp vec3 yuvVec;
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if (warmth > 0.0 ) {
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yuvVec = vec3(0.1765, -0.1255, 0.0902);
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}
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else {
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yuvVec = -vec3(0.0588, 0.1569, -0.1255);
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}
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highp vec3 yuvColor = rgbToYuv(result.rgb);
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highp float luma = yuvColor.r;
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highp float curveScale = sin(luma * 3.14159);
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yuvColor += 0.375 * warmth * curveScale * yuvVec;
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result.rgb = yuvToRgb(yuvColor);
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}
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);
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}
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@end
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