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95 lines
3.4 KiB
Objective-C
Executable File
95 lines
3.4 KiB
Objective-C
Executable File
#import "GPUImageTextureInput.h"
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@implementation GPUImageTextureInput
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#pragma mark -
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#pragma mark Initialization and teardown
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- (instancetype)initWithTexture:(GLuint)newInputTexture size:(CGSize)newTextureSize
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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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runSynchronouslyOnVideoProcessingQueue(^{
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[GPUImageContext useImageProcessingContext];
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});
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textureSize = newTextureSize;
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runSynchronouslyOnVideoProcessingQueue(^{
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outputFramebuffer = [[GPUImageFramebuffer alloc] initWithSize:newTextureSize overriddenTexture:newInputTexture];
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});
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return self;
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}
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- (instancetype)initWithCIImage:(CIImage *)ciImage
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{
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EAGLContext *context = [[GPUImageContext sharedImageProcessingContext] context];
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[EAGLContext setCurrentContext:[[GPUImageContext sharedImageProcessingContext] context]];
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GLsizei backingWidth = ciImage.extent.size.width;
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GLsizei backingHeight = ciImage.extent.size.height;
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GLuint outputTexture, defaultFramebuffer;
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glActiveTexture(GL_TEXTURE0);
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glGenTextures(1, &outputTexture);
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glBindTexture(GL_TEXTURE_2D, outputTexture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glBindTexture(GL_TEXTURE_2D, 0);
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glActiveTexture(GL_TEXTURE1);
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glGenFramebuffers(1, &defaultFramebuffer);
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glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
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glBindTexture(GL_TEXTURE_2D, outputTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, backingWidth, backingHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, outputTexture, 0);
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NSAssert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE, @"Incomplete filter FBO: %d", glCheckFramebufferStatus(GL_FRAMEBUFFER));
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glBindTexture(GL_TEXTURE_2D, 0);
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ciImage = [ciImage imageByApplyingTransform:CGAffineTransformConcat(CGAffineTransformMakeScale(1.0f, -1.0f), CGAffineTransformMakeTranslation(0.0f, ciImage.extent.size.height))];
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CIContext *ciContext = [CIContext contextWithEAGLContext:context options:@{kCIContextWorkingColorSpace: [NSNull null]}];
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[ciContext drawImage:ciImage inRect:ciImage.extent fromRect:ciImage.extent];
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if (self = [self initWithTexture:outputTexture size:ciImage.extent.size]) {
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textureSize = ciImage.extent.size;
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}
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return self;
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}
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- (void)processTextureWithFrameTime:(CMTime)frameTime synchronous:(bool)synchronous
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{
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void (^block)(void) = ^
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{
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for (id<GPUImageInput> currentTarget in targets)
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{
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NSInteger indexOfObject = [targets indexOfObject:currentTarget];
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NSInteger targetTextureIndex = [[targetTextureIndices objectAtIndex:indexOfObject] integerValue];
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[currentTarget setInputSize:textureSize atIndex:targetTextureIndex];
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[currentTarget setInputFramebuffer:outputFramebuffer atIndex:targetTextureIndex];
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[currentTarget newFrameReadyAtTime:frameTime atIndex:targetTextureIndex];
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}
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};
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if (synchronous)
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runSynchronouslyOnVideoProcessingQueue(block);
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else
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runAsynchronouslyOnVideoProcessingQueue(block);
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}
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- (CGSize)textureSize {
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return textureSize;
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}
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@end
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