#import "GPUImageFilter.h"
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#import "GPUImagePicture.h"
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#import <AVFoundation/AVFoundation.h>
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// Hardcode the vertex shader for standard filters, but this can be overridden
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NSString *const kGPUImageVertexShaderString = SHADER_STRING
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(
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attribute vec4 position;
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attribute vec4 inputTextureCoordinate;
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varying vec2 textureCoordinate;
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void main()
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{
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gl_Position = position;
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textureCoordinate = inputTextureCoordinate.xy;
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}
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);
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#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
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NSString *const kGPUImagePassthroughFragmentShaderString = SHADER_STRING
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(
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varying highp vec2 textureCoordinate;
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uniform sampler2D inputImageTexture;
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void main()
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{
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gl_FragColor = texture2D(inputImageTexture, textureCoordinate);
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}
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);
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#else
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NSString *const kGPUImagePassthroughFragmentShaderString = SHADER_STRING
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(
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varying vec2 textureCoordinate;
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uniform sampler2D inputImageTexture;
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void main()
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{
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gl_FragColor = texture2D(inputImageTexture, textureCoordinate);
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}
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);
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#endif
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@implementation GPUImageFilter
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@synthesize preventRendering = _preventRendering;
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@synthesize currentlyReceivingMonochromeInput;
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#pragma mark -
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#pragma mark Initialization and teardown
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- (id)initWithVertexShaderFromString:(NSString *)vertexShaderString fragmentShaderFromString:(NSString *)fragmentShaderString;
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{
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if (!(self = [super init]))
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{
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return nil;
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}
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uniformStateRestorationBlocks = [NSMutableDictionary dictionaryWithCapacity:10];
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_preventRendering = NO;
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currentlyReceivingMonochromeInput = NO;
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inputRotation = kGPUImageNoRotation;
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backgroundColorRed = 0.0;
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backgroundColorGreen = 0.0;
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backgroundColorBlue = 0.0;
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backgroundColorAlpha = 0.0;
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imageCaptureSemaphore = dispatch_semaphore_create(0);
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dispatch_semaphore_signal(imageCaptureSemaphore);
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runSynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext useImageProcessingContext];
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filterProgram = [[GPUImageContext sharedImageProcessingContext] programForVertexShaderString:vertexShaderString fragmentShaderString:fragmentShaderString];
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if (!filterProgram.initialized)
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{
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[self initializeAttributes];
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if (![filterProgram link])
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{
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NSString *progLog = [filterProgram programLog];
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NSLog(@"Program link log: %@", progLog);
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NSString *fragLog = [filterProgram fragmentShaderLog];
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NSLog(@"Fragment shader compile log: %@", fragLog);
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NSString *vertLog = [filterProgram vertexShaderLog];
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NSLog(@"Vertex shader compile log: %@", vertLog);
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filterProgram = nil;
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NSAssert(NO, @"Filter shader link failed");
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}
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}
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filterPositionAttribute = [filterProgram attributeIndex:@"position"];
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filterTextureCoordinateAttribute = [filterProgram attributeIndex:@"inputTextureCoordinate"];
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filterInputTextureUniform = [filterProgram uniformIndex:@"inputImageTexture"]; // This does assume a name of "inputImageTexture" for the fragment shader
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[GPUImageContext setActiveShaderProgram:filterProgram];
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glEnableVertexAttribArray(filterPositionAttribute);
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glEnableVertexAttribArray(filterTextureCoordinateAttribute);
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});
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return self;
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}
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- (id)initWithFragmentShaderFromString:(NSString *)fragmentShaderString;
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{
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if (!(self = [self initWithVertexShaderFromString:kGPUImageVertexShaderString fragmentShaderFromString:fragmentShaderString]))
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{
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return nil;
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}
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return self;
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}
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- (id)initWithFragmentShaderFromFile:(NSString *)fragmentShaderFilename;
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{
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NSString *fragmentShaderPathname = [[NSBundle mainBundle] pathForResource:fragmentShaderFilename ofType:@"fsh"];
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NSString *fragmentShaderString = [NSString stringWithContentsOfFile:fragmentShaderPathname encoding:NSUTF8StringEncoding error:nil];
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if (!(self = [self initWithFragmentShaderFromString:fragmentShaderString]))
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{
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return nil;
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}
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return self;
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}
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- (id)init;
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{
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if (!(self = [self initWithFragmentShaderFromString:kGPUImagePassthroughFragmentShaderString]))
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{
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return nil;
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}
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return self;
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}
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- (void)initializeAttributes;
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{
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[filterProgram addAttribute:@"position"];
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[filterProgram addAttribute:@"inputTextureCoordinate"];
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// Override this, calling back to this super method, in order to add new attributes to your vertex shader
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}
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- (void)setupFilterForSize:(CGSize)filterFrameSize;
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{
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// This is where you can override to provide some custom setup, if your filter has a size-dependent element
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}
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- (void)dealloc
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{
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#if !OS_OBJECT_USE_OBJC
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if (imageCaptureSemaphore != NULL)
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{
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dispatch_release(imageCaptureSemaphore);
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}
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#endif
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}
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#pragma mark -
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#pragma mark Still image processing
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- (void)useNextFrameForImageCapture;
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{
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usingNextFrameForImageCapture = YES;
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// Set the semaphore high, if it isn't already
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if (dispatch_semaphore_wait(imageCaptureSemaphore, DISPATCH_TIME_NOW) != 0)
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{
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return;
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}
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}
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- (CGImageRef)newCGImageFromCurrentlyProcessedOutput
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{
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// Give it three seconds to process, then abort if they forgot to set up the image capture properly
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double timeoutForImageCapture = 3.0;
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dispatch_time_t convertedTimeout = dispatch_time(DISPATCH_TIME_NOW, timeoutForImageCapture * NSEC_PER_SEC);
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if (dispatch_semaphore_wait(imageCaptureSemaphore, convertedTimeout) != 0)
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{
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return NULL;
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}
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GPUImageFramebuffer* framebuffer = [self framebufferForOutput];
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usingNextFrameForImageCapture = NO;
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dispatch_semaphore_signal(imageCaptureSemaphore);
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CGImageRef image = [framebuffer newCGImageFromFramebufferContents];
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return image;
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}
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#pragma mark -
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#pragma mark Managing the display FBOs
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- (CGSize)sizeOfFBO;
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{
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CGSize outputSize = [self maximumOutputSize];
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if ( (CGSizeEqualToSize(outputSize, CGSizeZero)) || (inputTextureSize.width < outputSize.width) )
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{
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return inputTextureSize;
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}
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else
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{
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return outputSize;
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}
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}
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#pragma mark -
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#pragma mark Rendering
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+ (const GLfloat *)textureCoordinatesForRotation:(GPUImageRotationMode)rotationMode;
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{
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static const GLfloat noRotationTextureCoordinates[] = {
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0.0f, 0.0f,
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1.0f, 0.0f,
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0.0f, 1.0f,
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1.0f, 1.0f,
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};
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static const GLfloat rotateLeftTextureCoordinates[] = {
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1.0f, 0.0f,
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1.0f, 1.0f,
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0.0f, 0.0f,
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0.0f, 1.0f,
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};
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static const GLfloat rotateRightTextureCoordinates[] = {
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0.0f, 1.0f,
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0.0f, 0.0f,
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1.0f, 1.0f,
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1.0f, 0.0f,
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};
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static const GLfloat verticalFlipTextureCoordinates[] = {
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0.0f, 1.0f,
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1.0f, 1.0f,
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0.0f, 0.0f,
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1.0f, 0.0f,
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};
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static const GLfloat horizontalFlipTextureCoordinates[] = {
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1.0f, 0.0f,
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0.0f, 0.0f,
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1.0f, 1.0f,
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0.0f, 1.0f,
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};
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static const GLfloat rotateRightVerticalFlipTextureCoordinates[] = {
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0.0f, 0.0f,
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0.0f, 1.0f,
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1.0f, 0.0f,
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1.0f, 1.0f,
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};
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static const GLfloat rotateRightHorizontalFlipTextureCoordinates[] = {
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1.0f, 1.0f,
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1.0f, 0.0f,
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0.0f, 1.0f,
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0.0f, 0.0f,
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};
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static const GLfloat rotate180TextureCoordinates[] = {
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1.0f, 1.0f,
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0.0f, 1.0f,
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1.0f, 0.0f,
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0.0f, 0.0f,
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};
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switch(rotationMode)
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{
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case kGPUImageNoRotation: return noRotationTextureCoordinates;
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case kGPUImageRotateLeft: return rotateLeftTextureCoordinates;
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case kGPUImageRotateRight: return rotateRightTextureCoordinates;
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case kGPUImageFlipVertical: return verticalFlipTextureCoordinates;
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case kGPUImageFlipHorizonal: return horizontalFlipTextureCoordinates;
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case kGPUImageRotateRightFlipVertical: return rotateRightVerticalFlipTextureCoordinates;
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case kGPUImageRotateRightFlipHorizontal: return rotateRightHorizontalFlipTextureCoordinates;
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case kGPUImageRotate180: return rotate180TextureCoordinates;
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}
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}
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- (void)renderToTextureWithVertices:(const GLfloat *)vertices textureCoordinates:(const GLfloat *)textureCoordinates;
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{
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if (self.preventRendering)
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{
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[firstInputFramebuffer unlock];
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return;
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}
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[GPUImageContext setActiveShaderProgram:filterProgram];
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outputFramebuffer = [[GPUImageContext sharedFramebufferCache] fetchFramebufferForSize:[self sizeOfFBO] textureOptions:self.outputTextureOptions onlyTexture:NO];
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[outputFramebuffer activateFramebuffer];
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if (usingNextFrameForImageCapture)
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{
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[outputFramebuffer lock];
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}
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[self setUniformsForProgramAtIndex:0];
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glClearColor(backgroundColorRed, backgroundColorGreen, backgroundColorBlue, backgroundColorAlpha);
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glClear(GL_COLOR_BUFFER_BIT);
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glActiveTexture(GL_TEXTURE2);
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glBindTexture(GL_TEXTURE_2D, [firstInputFramebuffer texture]);
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glUniform1i(filterInputTextureUniform, 2);
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glVertexAttribPointer(filterPositionAttribute, 2, GL_FLOAT, 0, 0, vertices);
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glVertexAttribPointer(filterTextureCoordinateAttribute, 2, GL_FLOAT, 0, 0, textureCoordinates);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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[firstInputFramebuffer unlock];
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if (usingNextFrameForImageCapture)
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{
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dispatch_semaphore_signal(imageCaptureSemaphore);
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}
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}
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- (void)informTargetsAboutNewFrameAtTime:(CMTime)frameTime;
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{
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if (self.frameProcessingCompletionBlock != NULL)
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{
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self.frameProcessingCompletionBlock(self, frameTime);
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}
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// Get all targets the framebuffer so they can grab a lock on it
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for (id<GPUImageInput> currentTarget in targets)
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{
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if (currentTarget != self.targetToIgnoreForUpdates)
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{
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NSInteger indexOfObject = [targets indexOfObject:currentTarget];
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NSInteger textureIndex = [[targetTextureIndices objectAtIndex:indexOfObject] integerValue];
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[self setInputFramebufferForTarget:currentTarget atIndex:textureIndex];
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[currentTarget setInputSize:[self outputFrameSize] atIndex:textureIndex];
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}
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}
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// Release our hold so it can return to the cache immediately upon processing
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[[self framebufferForOutput] unlock];
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if (usingNextFrameForImageCapture)
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{
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// usingNextFrameForImageCapture = NO;
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}
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else
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{
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[self removeOutputFramebuffer];
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}
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// Trigger processing last, so that our unlock comes first in serial execution, avoiding the need for a callback
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for (id<GPUImageInput> currentTarget in targets)
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{
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if (currentTarget != self.targetToIgnoreForUpdates)
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{
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NSInteger indexOfObject = [targets indexOfObject:currentTarget];
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NSInteger textureIndex = [[targetTextureIndices objectAtIndex:indexOfObject] integerValue];
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[currentTarget newFrameReadyAtTime:frameTime atIndex:textureIndex];
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}
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}
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}
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- (CGSize)outputFrameSize;
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{
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return inputTextureSize;
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}
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#pragma mark -
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#pragma mark Input parameters
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- (void)setBackgroundColorRed:(GLfloat)redComponent green:(GLfloat)greenComponent blue:(GLfloat)blueComponent alpha:(GLfloat)alphaComponent;
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{
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backgroundColorRed = redComponent;
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backgroundColorGreen = greenComponent;
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backgroundColorBlue = blueComponent;
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backgroundColorAlpha = alphaComponent;
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}
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- (void)setInteger:(GLint)newInteger forUniformName:(NSString *)uniformName;
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setInteger:newInteger forUniform:uniformIndex program:filterProgram];
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}
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- (void)setFloat:(GLfloat)newFloat forUniformName:(NSString *)uniformName;
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setFloat:newFloat forUniform:uniformIndex program:filterProgram];
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}
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- (void)setSize:(CGSize)newSize forUniformName:(NSString *)uniformName;
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setSize:newSize forUniform:uniformIndex program:filterProgram];
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}
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- (void)setPoint:(CGPoint)newPoint forUniformName:(NSString *)uniformName;
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setPoint:newPoint forUniform:uniformIndex program:filterProgram];
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}
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- (void)setFloatVec3:(GPUVector3)newVec3 forUniformName:(NSString *)uniformName;
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setVec3:newVec3 forUniform:uniformIndex program:filterProgram];
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}
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- (void)setFloatVec4:(GPUVector4)newVec4 forUniform:(NSString *)uniformName;
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setVec4:newVec4 forUniform:uniformIndex program:filterProgram];
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}
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- (void)setFloatArray:(GLfloat *)array length:(GLsizei)count forUniform:(NSString*)uniformName
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{
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GLint uniformIndex = [filterProgram uniformIndex:uniformName];
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[self setFloatArray:array length:count forUniform:uniformIndex program:filterProgram];
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}
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- (void)setMatrix3f:(GPUMatrix3x3)matrix forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniformMatrix3fv(uniform, 1, GL_FALSE, (GLfloat *)&matrix);
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}];
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});
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}
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- (void)setMatrix4f:(GPUMatrix4x4)matrix forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniformMatrix4fv(uniform, 1, GL_FALSE, (GLfloat *)&matrix);
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}];
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});
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}
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- (void)setFloat:(GLfloat)floatValue forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniform1f(uniform, floatValue);
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}];
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});
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}
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- (void)setPoint:(CGPoint)pointValue forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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GLfloat positionArray[2];
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positionArray[0] = pointValue.x;
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positionArray[1] = pointValue.y;
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glUniform2fv(uniform, 1, positionArray);
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}];
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});
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}
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- (void)setSize:(CGSize)sizeValue forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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GLfloat sizeArray[2];
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sizeArray[0] = sizeValue.width;
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sizeArray[1] = sizeValue.height;
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glUniform2fv(uniform, 1, sizeArray);
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}];
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});
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}
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- (void)setVec3:(GPUVector3)vectorValue forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
|
runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniform3fv(uniform, 1, (GLfloat *)&vectorValue);
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}];
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});
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}
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- (void)setVec4:(GPUVector4)vectorValue forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniform4fv(uniform, 1, (GLfloat *)&vectorValue);
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}];
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});
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}
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- (void)setFloatArray:(GLfloat *)arrayValue length:(GLsizei)arrayLength forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
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{
|
// Make a copy of the data, so it doesn't get overwritten before async call executes
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NSData* arrayData = [NSData dataWithBytes:arrayValue length:arrayLength * sizeof(arrayValue[0])];
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|
runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniform1fv(uniform, arrayLength, [arrayData bytes]);
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}];
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});
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}
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- (void)setInteger:(GLint)intValue forUniform:(GLint)uniform program:(GLProgram *)shaderProgram;
|
{
|
runAsynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext setActiveShaderProgram:shaderProgram];
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[self setAndExecuteUniformStateCallbackAtIndex:uniform forProgram:shaderProgram toBlock:^{
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glUniform1i(uniform, intValue);
|
}];
|
});
|
}
|
|
- (void)setAndExecuteUniformStateCallbackAtIndex:(GLint)uniform forProgram:(GLProgram *)shaderProgram toBlock:(dispatch_block_t)uniformStateBlock;
|
{
|
[uniformStateRestorationBlocks setObject:[uniformStateBlock copy] forKey:[NSNumber numberWithInt:uniform]];
|
uniformStateBlock();
|
}
|
|
- (void)setUniformsForProgramAtIndex:(NSUInteger)programIndex;
|
{
|
[uniformStateRestorationBlocks enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop){
|
dispatch_block_t currentBlock = obj;
|
currentBlock();
|
}];
|
}
|
|
#pragma mark -
|
#pragma mark GPUImageInput
|
|
- (void)newFrameReadyAtTime:(CMTime)frameTime atIndex:(NSInteger)textureIndex;
|
{
|
static const GLfloat imageVertices[] = {
|
-1.0f, -1.0f,
|
1.0f, -1.0f,
|
-1.0f, 1.0f,
|
1.0f, 1.0f,
|
};
|
|
[self renderToTextureWithVertices:imageVertices textureCoordinates:[[self class] textureCoordinatesForRotation:inputRotation]];
|
|
[self informTargetsAboutNewFrameAtTime:frameTime];
|
}
|
|
- (NSInteger)nextAvailableTextureIndex;
|
{
|
return 0;
|
}
|
|
- (void)setInputFramebuffer:(GPUImageFramebuffer *)newInputFramebuffer atIndex:(NSInteger)textureIndex;
|
{
|
firstInputFramebuffer = newInputFramebuffer;
|
[firstInputFramebuffer lock];
|
}
|
|
- (CGSize)rotatedSize:(CGSize)sizeToRotate forIndex:(NSInteger)textureIndex;
|
{
|
CGSize rotatedSize = sizeToRotate;
|
|
if (GPUImageRotationSwapsWidthAndHeight(inputRotation))
|
{
|
rotatedSize.width = sizeToRotate.height;
|
rotatedSize.height = sizeToRotate.width;
|
}
|
|
return rotatedSize;
|
}
|
|
- (CGPoint)rotatedPoint:(CGPoint)pointToRotate forRotation:(GPUImageRotationMode)rotation;
|
{
|
CGPoint rotatedPoint;
|
switch(rotation)
|
{
|
case kGPUImageNoRotation: return pointToRotate; break;
|
case kGPUImageFlipHorizonal:
|
{
|
rotatedPoint.x = 1.0 - pointToRotate.x;
|
rotatedPoint.y = pointToRotate.y;
|
}; break;
|
case kGPUImageFlipVertical:
|
{
|
rotatedPoint.x = pointToRotate.x;
|
rotatedPoint.y = 1.0 - pointToRotate.y;
|
}; break;
|
case kGPUImageRotateLeft:
|
{
|
rotatedPoint.x = 1.0 - pointToRotate.y;
|
rotatedPoint.y = pointToRotate.x;
|
}; break;
|
case kGPUImageRotateRight:
|
{
|
rotatedPoint.x = pointToRotate.y;
|
rotatedPoint.y = 1.0 - pointToRotate.x;
|
}; break;
|
case kGPUImageRotateRightFlipVertical:
|
{
|
rotatedPoint.x = pointToRotate.y;
|
rotatedPoint.y = pointToRotate.x;
|
}; break;
|
case kGPUImageRotateRightFlipHorizontal:
|
{
|
rotatedPoint.x = 1.0 - pointToRotate.y;
|
rotatedPoint.y = 1.0 - pointToRotate.x;
|
}; break;
|
case kGPUImageRotate180:
|
{
|
rotatedPoint.x = 1.0 - pointToRotate.x;
|
rotatedPoint.y = 1.0 - pointToRotate.y;
|
}; break;
|
}
|
|
return rotatedPoint;
|
}
|
|
- (void)setInputSize:(CGSize)newSize atIndex:(NSInteger)textureIndex;
|
{
|
if (self.preventRendering)
|
{
|
return;
|
}
|
|
if (overrideInputSize)
|
{
|
if (CGSizeEqualToSize(forcedMaximumSize, CGSizeZero))
|
{
|
}
|
else
|
{
|
CGRect insetRect = AVMakeRectWithAspectRatioInsideRect(newSize, CGRectMake(0.0, 0.0, forcedMaximumSize.width, forcedMaximumSize.height));
|
inputTextureSize = insetRect.size;
|
}
|
}
|
else
|
{
|
CGSize rotatedSize = [self rotatedSize:newSize forIndex:textureIndex];
|
|
if (CGSizeEqualToSize(rotatedSize, CGSizeZero))
|
{
|
inputTextureSize = rotatedSize;
|
}
|
else if (!CGSizeEqualToSize(inputTextureSize, rotatedSize))
|
{
|
inputTextureSize = rotatedSize;
|
}
|
}
|
|
[self setupFilterForSize:[self sizeOfFBO]];
|
}
|
|
- (void)setInputRotation:(GPUImageRotationMode)newInputRotation atIndex:(NSInteger)textureIndex;
|
{
|
inputRotation = newInputRotation;
|
}
|
|
- (void)forceProcessingAtSize:(CGSize)frameSize;
|
{
|
if (CGSizeEqualToSize(frameSize, CGSizeZero))
|
{
|
overrideInputSize = NO;
|
}
|
else
|
{
|
overrideInputSize = YES;
|
inputTextureSize = frameSize;
|
forcedMaximumSize = CGSizeZero;
|
}
|
}
|
|
- (void)forceProcessingAtSizeRespectingAspectRatio:(CGSize)frameSize;
|
{
|
if (CGSizeEqualToSize(frameSize, CGSizeZero))
|
{
|
overrideInputSize = NO;
|
inputTextureSize = CGSizeZero;
|
forcedMaximumSize = CGSizeZero;
|
}
|
else
|
{
|
overrideInputSize = YES;
|
forcedMaximumSize = frameSize;
|
}
|
}
|
|
- (CGSize)maximumOutputSize;
|
{
|
// I'm temporarily disabling adjustments for smaller output sizes until I figure out how to make this work better
|
return CGSizeZero;
|
|
/*
|
if (CGSizeEqualToSize(cachedMaximumOutputSize, CGSizeZero))
|
{
|
for (id<GPUImageInput> currentTarget in targets)
|
{
|
if ([currentTarget maximumOutputSize].width > cachedMaximumOutputSize.width)
|
{
|
cachedMaximumOutputSize = [currentTarget maximumOutputSize];
|
}
|
}
|
}
|
|
return cachedMaximumOutputSize;
|
*/
|
}
|
|
- (void)endProcessing
|
{
|
if (!isEndProcessing)
|
{
|
isEndProcessing = YES;
|
|
for (id<GPUImageInput> currentTarget in targets)
|
{
|
[currentTarget endProcessing];
|
}
|
}
|
}
|
|
- (BOOL)wantsMonochromeInput;
|
{
|
return NO;
|
}
|
|
#pragma mark -
|
#pragma mark Accessors
|
|
@end
|
