update .gitignore

developer

2023-05-20 e12c7b4c22df631ebdcd16b2f98fbef8f738f92f

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#import "GPUImageAlphaBlendFilter.h"
 
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
NSString *const kGPUImageAlphaBlendFragmentShaderString = SHADER_STRING
(
 varying highp vec2 textureCoordinate;
 varying highp vec2 textureCoordinate2;
 
 uniform sampler2D inputImageTexture;
 uniform sampler2D inputImageTexture2;
 
 uniform lowp float mixturePercent;
 
 void main()
 {
     lowp vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
     lowp vec4 textureColor2 = texture2D(inputImageTexture2, textureCoordinate2);
     
     gl_FragColor = vec4(mix(textureColor.rgb, textureColor2.rgb, textureColor2.a * mixturePercent), textureColor.a);
 }
);
#else
NSString *const kGPUImageAlphaBlendFragmentShaderString = SHADER_STRING
(
 varying vec2 textureCoordinate;
 varying vec2 textureCoordinate2;
 
 uniform sampler2D inputImageTexture;
 uniform sampler2D inputImageTexture2;
 
 uniform float mixturePercent;
 
 void main()
 {
     vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
     vec4 textureColor2 = texture2D(inputImageTexture2, textureCoordinate2);
     
     gl_FragColor = vec4(mix(textureColor.rgb, textureColor2.rgb, textureColor2.a * mixturePercent), textureColor.a);
 }
);
#endif
 
@implementation GPUImageAlphaBlendFilter
 
@synthesize mix = _mix;
 
- (id)init;
{
    if (!(self = [super initWithFragmentShaderFromString:kGPUImageAlphaBlendFragmentShaderString]))
    {
        return nil;
    }
    
    mixUniform = [filterProgram uniformIndex:@"mixturePercent"];
    self.mix = 0.5;
    
    return self;
}
 
 
#pragma mark -
#pragma mark Accessors
 
- (void)setMix:(CGFloat)newValue;
{
    _mix = newValue;
    
    [self setFloat:_mix forUniform:mixUniform program:filterProgram];
}
 
 
@end