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Telegram/thirdparty/PGPhotoEditor/GPUImage/GPUImageFramebufferCache.m

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#import "GPUImageFramebufferCache.h"
#import "GPUImageContext.h"
#import "GPUImageOutput.h"
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
#else
#endif
@interface GPUImageFramebufferCache()
{
// NSCache *framebufferCache;
NSMutableDictionary *framebufferCache;
NSMutableDictionary *framebufferTypeCounts;
NSMutableArray *activeImageCaptureList; // Where framebuffers that may be lost by a filter, but which are still needed for a UIImage, etc., are stored
id memoryWarningObserver;
dispatch_queue_t framebufferCacheQueue;
}
- (NSString *)hashForSize:(CGSize)size textureOptions:(GPUTextureOptions)textureOptions onlyTexture:(BOOL)onlyTexture;
@end
@implementation GPUImageFramebufferCache
#pragma mark -
#pragma mark Initialization and teardown
- (id)init
{
if (!(self = [super init]))
{
return nil;
}
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
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__weak GPUImageFramebufferCache *weakSelf = self;
memoryWarningObserver = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidReceiveMemoryWarningNotification object:nil queue:nil usingBlock:^(__unused NSNotification *note)
{
__strong GPUImageFramebufferCache *strongSelf = weakSelf;
if (strongSelf != nil)
[strongSelf purgeAllUnassignedFramebuffers];
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}];
#else
#endif
// framebufferCache = [[NSCache alloc] init];
framebufferCache = [[NSMutableDictionary alloc] init];
framebufferTypeCounts = [[NSMutableDictionary alloc] init];
activeImageCaptureList = [[NSMutableArray alloc] init];
framebufferCacheQueue = dispatch_queue_create("com.sunsetlakesoftware.GPUImage.framebufferCacheQueue", NULL);
return self;
}
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- (void)dealloc
{
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
[[NSNotificationCenter defaultCenter] removeObserver:self];
#endif
}
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#pragma mark -
#pragma mark Framebuffer management
- (NSString *)hashForSize:(CGSize)size textureOptions:(GPUTextureOptions)textureOptions onlyTexture:(BOOL)onlyTexture
{
if (onlyTexture)
{
return [NSString stringWithFormat:@"%.1fx%.1f-%d:%d:%d:%d:%d:%d:%d-NOFB", size.width, size.height, textureOptions.minFilter, textureOptions.magFilter, textureOptions.wrapS, textureOptions.wrapT, textureOptions.internalFormat, textureOptions.format, textureOptions.type];
}
else
{
return [NSString stringWithFormat:@"%.1fx%.1f-%d:%d:%d:%d:%d:%d:%d", size.width, size.height, textureOptions.minFilter, textureOptions.magFilter, textureOptions.wrapS, textureOptions.wrapT, textureOptions.internalFormat, textureOptions.format, textureOptions.type];
}
}
- (GPUImageFramebuffer *)fetchFramebufferForSize:(CGSize)framebufferSize textureOptions:(GPUTextureOptions)textureOptions onlyTexture:(BOOL)onlyTexture
{
__block GPUImageFramebuffer *framebufferFromCache = nil;
// dispatch_sync(framebufferCacheQueue, ^{
runSynchronouslyOnVideoProcessingQueue(^{
NSString *lookupHash = [self hashForSize:framebufferSize textureOptions:textureOptions onlyTexture:onlyTexture];
NSNumber *numberOfMatchingTexturesInCache = [framebufferTypeCounts objectForKey:lookupHash];
NSInteger numberOfMatchingTextures = [numberOfMatchingTexturesInCache integerValue];
if ([numberOfMatchingTexturesInCache integerValue] < 1)
{
// Nothing in the cache, create a new framebuffer to use
framebufferFromCache = [[GPUImageFramebuffer alloc] initWithSize:framebufferSize textureOptions:textureOptions onlyTexture:onlyTexture];
}
else
{
// Something found, pull the old framebuffer and decrement the count
NSInteger currentTextureID = (numberOfMatchingTextures - 1);
while ((framebufferFromCache == nil) && (currentTextureID >= 0))
{
NSString *textureHash = [NSString stringWithFormat:@"%@-%ld", lookupHash, (long)currentTextureID];
framebufferFromCache = [framebufferCache objectForKey:textureHash];
// Test the values in the cache first, to see if they got invalidated behind our back
if (framebufferFromCache != nil)
{
// Withdraw this from the cache while it's in use
[framebufferCache removeObjectForKey:textureHash];
}
currentTextureID--;
}
currentTextureID++;
[framebufferTypeCounts setObject:[NSNumber numberWithInteger:currentTextureID] forKey:lookupHash];
if (framebufferFromCache == nil)
{
framebufferFromCache = [[GPUImageFramebuffer alloc] initWithSize:framebufferSize textureOptions:textureOptions onlyTexture:onlyTexture];
}
}
});
[framebufferFromCache lock];
return framebufferFromCache;
}
- (GPUImageFramebuffer *)fetchFramebufferForSize:(CGSize)framebufferSize onlyTexture:(BOOL)onlyTexture
{
GPUTextureOptions defaultTextureOptions;
defaultTextureOptions.minFilter = GL_LINEAR;
defaultTextureOptions.magFilter = GL_LINEAR;
defaultTextureOptions.wrapS = GL_CLAMP_TO_EDGE;
defaultTextureOptions.wrapT = GL_CLAMP_TO_EDGE;
defaultTextureOptions.internalFormat = GL_RGBA;
defaultTextureOptions.format = GL_BGRA;
defaultTextureOptions.type = GL_UNSIGNED_BYTE;
return [self fetchFramebufferForSize:framebufferSize textureOptions:defaultTextureOptions onlyTexture:onlyTexture];
}
- (void)returnFramebufferToCache:(GPUImageFramebuffer *)framebuffer
{
[framebuffer clearAllLocks];
// dispatch_async(framebufferCacheQueue, ^{
runAsynchronouslyOnVideoProcessingQueue(^{
CGSize framebufferSize = framebuffer.size;
GPUTextureOptions framebufferTextureOptions = framebuffer.textureOptions;
NSString *lookupHash = [self hashForSize:framebufferSize textureOptions:framebufferTextureOptions onlyTexture:framebuffer.missingFramebuffer];
NSNumber *numberOfMatchingTexturesInCache = [framebufferTypeCounts objectForKey:lookupHash];
NSInteger numberOfMatchingTextures = [numberOfMatchingTexturesInCache integerValue];
NSString *textureHash = [NSString stringWithFormat:@"%@-%ld", lookupHash, (long)numberOfMatchingTextures];
// [framebufferCache setObject:framebuffer forKey:textureHash cost:round(framebufferSize.width * framebufferSize.height * 4.0)];
[framebufferCache setObject:framebuffer forKey:textureHash];
[framebufferTypeCounts setObject:[NSNumber numberWithInteger:(numberOfMatchingTextures + 1)] forKey:lookupHash];
});
}
- (void)purgeAllUnassignedFramebuffers
{
runAsynchronouslyOnVideoProcessingQueue(^{
// dispatch_async(framebufferCacheQueue, ^{
[framebufferCache removeAllObjects];
[framebufferTypeCounts removeAllObjects];
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
CVOpenGLESTextureCacheFlush([[GPUImageContext sharedImageProcessingContext] coreVideoTextureCache], 0);
#else
#endif
});
}
- (void)addFramebufferToActiveImageCaptureList:(GPUImageFramebuffer *)framebuffer
{
runAsynchronouslyOnVideoProcessingQueue(^{
// dispatch_async(framebufferCacheQueue, ^{
[activeImageCaptureList addObject:framebuffer];
});
}
- (void)removeFramebufferFromActiveImageCaptureList:(GPUImageFramebuffer *)framebuffer
{
runAsynchronouslyOnVideoProcessingQueue(^{
// dispatch_async(framebufferCacheQueue, ^{
[activeImageCaptureList removeObject:framebuffer];
});
}
@end