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Decoupled execution speed and frame rate; cleaned up.

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This commit is contained in:
Thomas Harte 2016-03-03 22:12:31 -05:00
parent 2f7626a5e0
commit c754a6e45a
1 changed files with 29 additions and 81 deletions
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110
OSBindings/Mac/Clock Signal/Views/CSCathodeRayView.m
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@ -9,34 +9,18 @@
#import "CSCathodeRayView.h"
@import CoreVideo;
@import GLKit;
//#import <OpenGL/gl3.h>
//#import <OpenGL/gl3ext.h>
//#import <libkern/OSAtomic.h>
typedef NS_ENUM(NSInteger, CSOpenGLViewCondition) {
CSOpenGLViewConditionReadyForUpdate,
CSOpenGLViewConditionUpdating
};
@implementation CSCathodeRayView {
CVDisplayLinkRef _displayLink;
CGRect _aspectRatioCorrectedBounds;
NSConditionLock *_runningLock;
dispatch_queue_t _dispatchQueue;
}
/*- (GLuint)textureForImageNamed:(NSString *)name
{
NSImage *const image = [NSImage imageNamed:name];
NSBitmapImageRep *bitmapRepresentation = [[NSBitmapImageRep alloc] initWithData: [image TIFFRepresentation]];
GLuint textureName;
glGenTextures(1, &textureName);
glBindTexture(GL_TEXTURE_2D, textureName);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, (GLsizei)image.size.width, (GLsizei)image.size.height, 0, GL_RGB, GL_UNSIGNED_BYTE, bitmapRepresentation.bitmapData);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glGenerateMipmap(GL_TEXTURE_2D);
return textureName;
}*/
- (void)prepareOpenGL
{
// Synchronize buffer swaps with vertical refresh rate
@ -48,20 +32,17 @@
// Set the renderer output callback function
CVDisplayLinkSetOutputCallback(_displayLink, DisplayLinkCallback, (__bridge void * __nullable)(self));
// Create a queue and a condition lock for dispatching to it
_runningLock = [[NSConditionLock alloc] initWithCondition:CSOpenGLViewConditionReadyForUpdate];
_dispatchQueue = dispatch_queue_create("com.thomasharte.clocksignal.GL", DISPATCH_QUEUE_SERIAL);
// Set the display link for the current renderer
CGLContextObj cglContext = [[self openGLContext] CGLContextObj];
CGLPixelFormatObj cglPixelFormat = [[self pixelFormat] CGLPixelFormatObj];
CVDisplayLinkSetCurrentCGDisplayFromOpenGLContext(_displayLink, cglContext, cglPixelFormat);
// install the shadow mask texture as the second texture
/* glActiveTexture(GL_TEXTURE1);
_shadowMaskTextureName = [self textureForImageNamed:@"ShadowMask"];
// otherwise, we'll be working on the first texture
glActiveTexture(GL_TEXTURE0);*/
// get the shader ready, set the clear colour
// set the clear colour
[self.openGLContext makeCurrentContext];
glClearColor(0.0, 0.0, 0.0, 1.0);
@ -75,28 +56,36 @@
static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeStamp *now, const CVTimeStamp *outputTime, CVOptionFlags flagsIn, CVOptionFlags *flagsOut, void *displayLinkContext)
{
CSCathodeRayView *view = (__bridge CSCathodeRayView *)displayLinkContext;
[view.delegate openGLView:view didUpdateToTime:*now];
[view drawViewOnlyIfDirty:YES];
[view drawAtTime:now];
return kCVReturnSuccess;
}
- (void)drawAtTime:(const CVTimeStamp *)now
{
if([_runningLock tryLockWhenCondition:CSOpenGLViewConditionReadyForUpdate])
{
CVTimeStamp timeStamp = *now;
dispatch_async(_dispatchQueue, ^{
[_runningLock lockWhenCondition:CSOpenGLViewConditionUpdating];
[self.delegate openGLView:self didUpdateToTime:timeStamp];
[self drawViewOnlyIfDirty:YES];
[_runningLock unlockWithCondition:CSOpenGLViewConditionReadyForUpdate];
});
[_runningLock unlockWithCondition:CSOpenGLViewConditionUpdating];
}
}
- (void)invalidate
{
CVDisplayLinkStop(_displayLink);
[_runningLock lockWhenCondition:CSOpenGLViewConditionReadyForUpdate];
[_runningLock unlock];
}
- (void)dealloc
{
// Release the display link
CVDisplayLinkRelease(_displayLink);
// Release OpenGL buffers
// [self.openGLContext makeCurrentContext];
// glDeleteBuffers(1, &_arrayBuffer);
// glDeleteVertexArrays(1, &_vertexArray);
// glDeleteTextures(1, &_textureName);
// glDeleteTextures(1, &_shadowMaskTextureName);
// glDeleteProgram(_shaderProgram);
}
- (CGSize)backingSize
@ -114,47 +103,9 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
CGSize viewSize = [self backingSize];
glViewport(0, 0, (GLsizei)viewSize.width, (GLsizei)viewSize.height);
// [self pushSizeUniforms];
CGLUnlockContext([[self openGLContext] CGLContextObj]);
}
//- (void)setFrameBounds:(CGRect)frameBounds
//{
// _frameBounds = frameBounds;
//
// [self.openGLContext makeCurrentContext];
// CGLLockContext([[self openGLContext] CGLContextObj]);
//
// [self pushSizeUniforms];
//
// CGLUnlockContext([[self openGLContext] CGLContextObj]);
//}
//
//- (void)pushSizeUniforms
//{
// if(_shaderProgram)
// {
// NSPoint viewSize = [self backingViewSize];
// if(_windowSizeUniform >= 0)
// {
// glUniform2f(_windowSizeUniform, (GLfloat)viewSize.x, (GLfloat)viewSize.y);
// }
//
// CGFloat outputAspectRatioMultiplier = (viewSize.x / viewSize.y) / (4.0 / 3.0);
//
//// NSLog(@"%0.2f v %0.2f", outputAspectRatio, desiredOutputAspectRatio);
// _aspectRatioCorrectedBounds = _frameBounds;
//
// CGFloat bonusWidth = (outputAspectRatioMultiplier - 1.0f) * _frameBounds.size.width;
// _aspectRatioCorrectedBounds.origin.x -= bonusWidth * 0.5f * _aspectRatioCorrectedBounds.size.width;
// _aspectRatioCorrectedBounds.size.width *= outputAspectRatioMultiplier;
//
// if(_boundsOriginUniform >= 0) glUniform2f(_boundsOriginUniform, (GLfloat)_aspectRatioCorrectedBounds.origin.x, (GLfloat)_aspectRatioCorrectedBounds.origin.y);
// if(_boundsSizeUniform >= 0) glUniform2f(_boundsSizeUniform, (GLfloat)_aspectRatioCorrectedBounds.size.width, (GLfloat)_aspectRatioCorrectedBounds.size.height);
// }
//}
- (void)awakeFromNib
{
NSOpenGLPixelFormatAttribute attributes[] =
@ -182,9 +133,6 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
self.pixelFormat = pixelFormat;
self.openGLContext = context;
self.wantsBestResolutionOpenGLSurface = YES;
// establish default instance variable values
// self.frameBounds = CGRectMake(0.0, 0.0, 1.0, 1.0);
}
- (void)drawRect:(NSRect)dirtyRect