Dariusz Komosiński
6 years ago
committed by
GitHub
GitHub
26 changed files with 639 additions and 566 deletions
@ -0,0 +1,12 @@ |
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@protocol IRenderTarget |
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-(void) setNewLayer: (CALayer*) layer; |
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-(HRESULT) setSwFrame: (AvnFramebuffer*) fb; |
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-(void) resize: (AvnPixelSize) size withScale: (float) scale; |
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-(AvnPixelSize) pixelSize; |
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-(IAvnGlSurfaceRenderTarget*) createSurfaceRenderTarget; |
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@end |
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@interface IOSurfaceRenderTarget : NSObject<IRenderTarget> |
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-(IOSurfaceRenderTarget*) initWithOpenGlContext: (IAvnGlContext*) context; |
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@end |
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@ -0,0 +1,166 @@ |
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#include "common.h" |
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#include <dlfcn.h> |
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static CGLContextObj CreateCglContext(CGLContextObj share) |
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{ |
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int attributes[] = { |
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kCGLPFAAccelerated, |
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kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute)kCGLOGLPVersion_3_2_Core, |
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kCGLPFADepthSize, 8, |
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kCGLPFAStencilSize, 8, |
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kCGLPFAColorSize, 32, |
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0 |
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}; |
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CGLPixelFormatObj pix; |
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CGLError errorCode; |
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GLint num; // stores the number of possible pixel formats |
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errorCode = CGLChoosePixelFormat( (CGLPixelFormatAttribute*)attributes, &pix, &num ); |
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if(errorCode != 0) |
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return nil; |
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CGLContextObj ctx = nil; |
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errorCode = CGLCreateContext(pix, share, &ctx ); |
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CGLDestroyPixelFormat( pix ); |
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if(errorCode != 0) |
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return nil; |
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return ctx; |
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}; |
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class AvnGlContext : public virtual ComSingleObject<IAvnGlContext, &IID_IAvnGlContext> |
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{ |
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// Debug |
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int _usageCount = 0; |
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public: |
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CGLContextObj Context; |
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int SampleCount = 0, StencilBits = 0; |
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FORWARD_IUNKNOWN() |
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class SavedGlContext : public virtual ComUnknownObject |
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{ |
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CGLContextObj _savedContext; |
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ComPtr<AvnGlContext> _parent; |
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public: |
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SavedGlContext(CGLContextObj saved, AvnGlContext* parent) |
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{ |
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_savedContext = saved; |
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_parent = parent; |
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_parent->_usageCount++; |
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} |
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~SavedGlContext() |
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{ |
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if(_parent->Context == CGLGetCurrentContext()) |
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CGLSetCurrentContext(_savedContext); |
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_parent->_usageCount--; |
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CGLUnlockContext(_parent->Context); |
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} |
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}; |
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AvnGlContext(CGLContextObj context) |
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{ |
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Context = context; |
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CGLPixelFormatObj fmt = CGLGetPixelFormat(context); |
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CGLDescribePixelFormat(fmt, 0, kCGLPFASamples, &SampleCount); |
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CGLDescribePixelFormat(fmt, 0, kCGLPFAStencilSize, &StencilBits); |
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} |
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virtual HRESULT LegacyMakeCurrent() override |
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{ |
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if(CGLSetCurrentContext(Context) != 0) |
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return E_FAIL; |
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return S_OK; |
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} |
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virtual HRESULT MakeCurrent(IUnknown** ppv) override |
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{ |
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CGLContextObj saved = CGLGetCurrentContext(); |
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CGLLockContext(Context); |
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if(CGLSetCurrentContext(Context) != 0) |
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{ |
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CGLUnlockContext(Context); |
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return E_FAIL; |
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} |
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*ppv = new SavedGlContext(saved, this); |
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return S_OK; |
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} |
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virtual int GetSampleCount() override |
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{ |
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return SampleCount; |
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} |
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virtual int GetStencilSize() override |
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{ |
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return StencilBits; |
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} |
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virtual void* GetNativeHandle() override |
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{ |
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return Context; |
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} |
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~AvnGlContext() |
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{ |
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CGLReleaseContext(Context); |
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} |
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}; |
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class AvnGlDisplay : public virtual ComSingleObject<IAvnGlDisplay, &IID_IAvnGlDisplay> |
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{ |
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void* _libgl; |
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public: |
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FORWARD_IUNKNOWN() |
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AvnGlDisplay() |
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{ |
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_libgl = dlopen("/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib", RTLD_LAZY); |
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} |
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virtual void* GetProcAddress(char* proc) override |
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{ |
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return dlsym(_libgl, proc); |
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} |
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virtual HRESULT CreateContext(IAvnGlContext* share, IAvnGlContext**ppv) override |
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{ |
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CGLContextObj shareContext = nil; |
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if(share != nil) |
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{ |
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AvnGlContext* shareCtx = dynamic_cast<AvnGlContext*>(share); |
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if(shareCtx != nil) |
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shareContext = shareCtx->Context; |
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} |
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CGLContextObj ctx = ::CreateCglContext(shareContext); |
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if(ctx == nil) |
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return E_FAIL; |
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*ppv = new AvnGlContext(ctx); |
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return S_OK; |
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} |
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virtual HRESULT WrapContext(void* native, IAvnGlContext**ppv) override |
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{ |
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if(native == nil) |
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return E_INVALIDARG; |
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*ppv = new AvnGlContext((CGLContextObj) native); |
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return S_OK; |
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} |
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virtual void LegacyClearCurrentContext() override |
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{ |
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CGLSetCurrentContext(nil); |
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} |
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}; |
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static IAvnGlDisplay* GlDisplay = new AvnGlDisplay(); |
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extern IAvnGlDisplay* GetGlDisplay() |
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{ |
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return GlDisplay; |
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}; |
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@ -1,261 +0,0 @@ |
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#include "common.h" |
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#include <OpenGL/gl.h> |
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#include <dlfcn.h> |
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#include "window.h" |
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template <typename T, size_t N> char (&ArrayCounter(T (&a)[N]))[N]; |
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#define ARRAY_COUNT(a) (sizeof(ArrayCounter(a))) |
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NSOpenGLPixelFormat* CreateFormat() |
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{ |
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NSOpenGLPixelFormatAttribute attribs[] = |
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{ |
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NSOpenGLPFADoubleBuffer, |
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NSOpenGLPFAColorSize, 32, |
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NSOpenGLPFAStencilSize, 8, |
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NSOpenGLPFADepthSize, 8, |
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0 |
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}; |
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return [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs]; |
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} |
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class AvnGlContext : public virtual ComSingleObject<IAvnGlContext, &IID_IAvnGlContext> |
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{ |
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public: |
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FORWARD_IUNKNOWN() |
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NSOpenGLContext* GlContext; |
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GLuint Framebuffer, RenderBuffer, StencilBuffer; |
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AvnGlContext(NSOpenGLContext* gl, bool offscreen) |
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{ |
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Framebuffer = 0; |
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RenderBuffer = 0; |
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StencilBuffer = 0; |
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GlContext = gl; |
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if(offscreen) |
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{ |
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[GlContext makeCurrentContext]; |
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glGenFramebuffersEXT(1, &Framebuffer); |
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glBindFramebufferEXT(GL_FRAMEBUFFER, Framebuffer); |
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glGenRenderbuffersEXT(1, &RenderBuffer); |
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glGenRenderbuffersEXT(1, &StencilBuffer); |
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glBindRenderbufferEXT(GL_RENDERBUFFER, StencilBuffer); |
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, StencilBuffer); |
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glBindRenderbufferEXT(GL_RENDERBUFFER, RenderBuffer); |
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, RenderBuffer); |
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} |
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} |
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virtual HRESULT MakeCurrent() override |
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{ |
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[GlContext makeCurrentContext];/* |
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glBindFramebufferEXT(GL_FRAMEBUFFER, Framebuffer); |
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glBindRenderbufferEXT(GL_RENDERBUFFER, RenderBuffer); |
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, RenderBuffer); |
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glBindRenderbufferEXT(GL_RENDERBUFFER, StencilBuffer); |
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, StencilBuffer);*/ |
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return S_OK; |
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} |
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}; |
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class AvnGlDisplay : public virtual ComSingleObject<IAvnGlDisplay, &IID_IAvnGlDisplay> |
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{ |
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int _sampleCount, _stencilSize; |
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void* _libgl; |
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public: |
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FORWARD_IUNKNOWN() |
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AvnGlDisplay(int sampleCount, int stencilSize) |
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{ |
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_sampleCount = sampleCount; |
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_stencilSize = stencilSize; |
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_libgl = dlopen("/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib", RTLD_LAZY); |
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} |
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virtual HRESULT GetSampleCount(int* ret) override |
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{ |
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*ret = _sampleCount; |
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return S_OK; |
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} |
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virtual HRESULT GetStencilSize(int* ret) override |
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{ |
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*ret = _stencilSize; |
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return S_OK; |
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} |
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virtual HRESULT ClearContext() override |
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{ |
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[NSOpenGLContext clearCurrentContext]; |
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return S_OK; |
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} |
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virtual void* GetProcAddress(char* proc) override |
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{ |
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return dlsym(_libgl, proc); |
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} |
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}; |
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class GlFeature : public virtual ComSingleObject<IAvnGlFeature, &IID_IAvnGlFeature> |
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{ |
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IAvnGlDisplay* _display; |
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AvnGlContext *_immediate; |
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NSOpenGLContext* _shared; |
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public: |
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FORWARD_IUNKNOWN() |
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NSOpenGLPixelFormat* _format; |
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GlFeature(IAvnGlDisplay* display, AvnGlContext* immediate, NSOpenGLPixelFormat* format) |
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{ |
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_display = display; |
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_immediate = immediate; |
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_format = format; |
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_shared = [[NSOpenGLContext alloc] initWithFormat:_format shareContext:_immediate->GlContext]; |
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} |
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NSOpenGLContext* CreateContext() |
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{ |
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return _shared; |
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//return [[NSOpenGLContext alloc] initWithFormat:_format shareContext:nil]; |
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} |
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virtual HRESULT ObtainDisplay(IAvnGlDisplay**retOut) override |
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{ |
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*retOut = _display; |
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_display->AddRef(); |
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return S_OK; |
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} |
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virtual HRESULT ObtainImmediateContext(IAvnGlContext**retOut) override |
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{ |
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*retOut = _immediate; |
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_immediate->AddRef(); |
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return S_OK; |
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} |
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}; |
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static GlFeature* Feature; |
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GlFeature* CreateGlFeature() |
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{ |
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auto format = CreateFormat(); |
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if(format == nil) |
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{ |
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NSLog(@"Unable to choose pixel format"); |
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return NULL; |
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} |
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auto immediateContext = [[NSOpenGLContext alloc] initWithFormat:format shareContext:nil]; |
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if(immediateContext == nil) |
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{ |
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NSLog(@"Unable to create NSOpenGLContext"); |
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return NULL; |
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} |
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int stencilBits = 0, sampleCount = 0; |
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auto fmt = CGLGetPixelFormat([immediateContext CGLContextObj]); |
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CGLDescribePixelFormat(fmt, 0, kCGLPFASamples, &sampleCount); |
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CGLDescribePixelFormat(fmt, 0, kCGLPFAStencilSize, &stencilBits); |
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auto offscreen = new AvnGlContext(immediateContext, true); |
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auto display = new AvnGlDisplay(sampleCount, stencilBits); |
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return new GlFeature(display, offscreen, format); |
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} |
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static GlFeature* GetFeature() |
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{ |
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if(Feature == nil) |
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Feature = CreateGlFeature(); |
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return Feature; |
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} |
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extern IAvnGlFeature* GetGlFeature() |
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{ |
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return GetFeature(); |
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} |
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class AvnGlRenderingSession : public ComSingleObject<IAvnGlSurfaceRenderingSession, &IID_IAvnGlSurfaceRenderingSession> |
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{ |
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AvnView* _view; |
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AvnWindow* _window; |
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NSOpenGLContext* _context; |
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public: |
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FORWARD_IUNKNOWN() |
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AvnGlRenderingSession(AvnWindow*window, AvnView* view, NSOpenGLContext* context) |
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{ |
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_context = context; |
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_window = window; |
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_view = view; |
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} |
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virtual HRESULT GetPixelSize(AvnPixelSize* ret) override |
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{ |
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*ret = [_view getPixelSize]; |
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return S_OK; |
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} |
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virtual HRESULT GetScaling(double* ret) override |
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{ |
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*ret = [_window getScaling]; |
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return S_OK; |
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} |
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virtual ~AvnGlRenderingSession() |
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{ |
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[_context flushBuffer]; |
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[NSOpenGLContext clearCurrentContext]; |
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CGLUnlockContext([_context CGLContextObj]); |
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[_view unlockFocus]; |
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} |
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}; |
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class AvnGlRenderTarget : public ComSingleObject<IAvnGlSurfaceRenderTarget, &IID_IAvnGlSurfaceRenderTarget> |
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{ |
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NSView* _view; |
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NSWindow* _window; |
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NSOpenGLContext* _context; |
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public: |
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FORWARD_IUNKNOWN() |
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AvnGlRenderTarget(NSWindow* window, NSView*view) |
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{ |
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_window = window; |
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_view = view; |
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_context = GetFeature()->CreateContext(); |
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} |
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virtual HRESULT BeginDrawing(IAvnGlSurfaceRenderingSession** ret) override |
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{ |
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auto f = GetFeature(); |
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if(f == NULL) |
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return E_FAIL; |
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@try |
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{ |
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if(![_view lockFocusIfCanDraw]) |
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return E_ABORT; |
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} |
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@catch(NSException* exception) |
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{ |
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return E_ABORT; |
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} |
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auto gl = _context; |
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CGLLockContext([_context CGLContextObj]); |
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[gl setView: _view]; |
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[gl update]; |
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[gl makeCurrentContext]; |
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*ret = new AvnGlRenderingSession(_window, _view, gl); |
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return S_OK; |
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} |
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}; |
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extern IAvnGlSurfaceRenderTarget* CreateGlRenderTarget(NSWindow* window, NSView* view) |
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{ |
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return new AvnGlRenderTarget(window, view); |
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} |
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@ -0,0 +1,284 @@ |
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#include "common.h" |
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#include "rendertarget.h" |
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#import <IOSurface/IOSurface.h> |
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#import <IOSurface/IOSurfaceObjC.h> |
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#include <OpenGL/CGLIOSurface.h> |
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#include <OpenGL/OpenGL.h> |
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#include <OpenGL/glext.h> |
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#include <OpenGL/gl3.h> |
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#include <OpenGL/gl3ext.h> |
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@interface IOSurfaceHolder : NSObject |
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@end |
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@implementation IOSurfaceHolder |
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{ |
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@public IOSurfaceRef surface; |
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@public AvnPixelSize size; |
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@public float scale; |
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ComPtr<IAvnGlContext> _context; |
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GLuint _framebuffer, _texture, _renderbuffer; |
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} |
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- (IOSurfaceHolder*) initWithSize: (AvnPixelSize) size |
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withScale: (float)scale |
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withOpenGlContext: (IAvnGlContext*) context |
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{ |
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long bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, size.Width * 4); |
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long allocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, size.Height * bytesPerRow); |
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NSDictionary* options = @{ |
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(id)kIOSurfaceWidth: @(size.Width), |
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(id)kIOSurfaceHeight: @(size.Height), |
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(id)kIOSurfacePixelFormat: @((uint)'BGRA'), |
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(id)kIOSurfaceBytesPerElement: @(4), |
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(id)kIOSurfaceBytesPerRow: @(bytesPerRow), |
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(id)kIOSurfaceAllocSize: @(allocSize), |
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//(id)kIOSurfaceCacheMode: @(kIOMapWriteCombineCache), |
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(id)kIOSurfaceElementWidth: @(1), |
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(id)kIOSurfaceElementHeight: @(1) |
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}; |
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surface = IOSurfaceCreate((CFDictionaryRef)options); |
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self->scale = scale; |
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self->size = size; |
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self->_context = context; |
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return self; |
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} |
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-(HRESULT) prepareForGlRender |
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{ |
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if(_context == nil) |
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return E_FAIL; |
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if(CGLGetCurrentContext() != _context->GetNativeHandle()) |
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return E_FAIL; |
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if(_framebuffer == 0) |
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glGenFramebuffersEXT(1, &_framebuffer); |
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _framebuffer); |
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if(_texture == 0) |
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{ |
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glGenTextures(1, &_texture); |
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glBindTexture(GL_TEXTURE_RECTANGLE_EXT, _texture); |
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CGLError res = CGLTexImageIOSurface2D((CGLContextObj)_context->GetNativeHandle(), |
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GL_TEXTURE_RECTANGLE_EXT, GL_RGBA8, |
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size.Width, size.Height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, surface, 0); |
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glBindTexture(GL_TEXTURE_RECTANGLE_EXT, 0); |
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if(res != 0) |
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{ |
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glDeleteTextures(1, &_texture); |
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_texture = 0; |
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); |
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return E_FAIL; |
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} |
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_RECTANGLE_EXT, _texture, 0); |
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} |
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if(_renderbuffer == 0) |
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{ |
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glGenRenderbuffers(1, &_renderbuffer); |
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glBindRenderbuffer(GL_RENDERBUFFER, _renderbuffer); |
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, size.Width, size.Height); |
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, _renderbuffer); |
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} |
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return S_OK; |
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} |
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-(void) finishDraw |
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{ |
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ComPtr<IUnknown> release; |
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_context->MakeCurrent(release.getPPV()); |
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); |
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glFlush(); |
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} |
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-(void) dealloc |
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{ |
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if(_framebuffer != 0) |
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{ |
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ComPtr<IUnknown> release; |
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_context->MakeCurrent(release.getPPV()); |
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glDeleteFramebuffers(1, &_framebuffer); |
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if(_texture != 0) |
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glDeleteTextures(1, &_texture); |
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if(_renderbuffer != 0) |
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glDeleteRenderbuffers(1, &_renderbuffer); |
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} |
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IOSurfaceDecrementUseCount(surface); |
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} |
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@end |
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static IAvnGlSurfaceRenderTarget* CreateGlRenderTarget(IOSurfaceRenderTarget* target); |
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@implementation IOSurfaceRenderTarget |
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{ |
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CALayer* _layer; |
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@public IOSurfaceHolder* surface; |
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@public NSObject* lock; |
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ComPtr<IAvnGlContext> _glContext; |
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} |
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- (IOSurfaceRenderTarget*) initWithOpenGlContext: (IAvnGlContext*) context; |
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{ |
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self = [super init]; |
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_glContext = context; |
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lock = [NSObject new]; |
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surface = nil; |
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[self resize:{1,1} withScale: 1]; |
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return self; |
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} |
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|
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- (AvnPixelSize) pixelSize { |
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return {1, 1}; |
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} |
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|
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- (CALayer *)layer { |
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return _layer; |
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} |
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|
|||
- (void)resize:(AvnPixelSize)size withScale: (float) scale;{ |
|||
@synchronized (lock) { |
|||
if(surface == nil |
|||
|| surface->size.Width != size.Width |
|||
|| surface->size.Height != size.Height |
|||
|| surface->scale != scale) |
|||
surface = [[IOSurfaceHolder alloc] initWithSize:size withScale:scale withOpenGlContext:_glContext.getRaw()]; |
|||
} |
|||
} |
|||
|
|||
- (void)updateLayer { |
|||
if ([NSThread isMainThread]) |
|||
{ |
|||
@synchronized (lock) { |
|||
if(_layer == nil) |
|||
return; |
|||
[_layer setContents: nil]; |
|||
if(surface != nil) |
|||
{ |
|||
[_layer setContentsScale: surface->scale]; |
|||
[_layer setContents: (__bridge IOSurface*) surface->surface]; |
|||
} |
|||
} |
|||
} |
|||
else |
|||
dispatch_async(dispatch_get_main_queue(), ^{ |
|||
[self updateLayer]; |
|||
}); |
|||
} |
|||
|
|||
- (void) setNewLayer:(CALayer *)layer { |
|||
_layer = layer; |
|||
[self updateLayer]; |
|||
} |
|||
|
|||
- (HRESULT)setSwFrame:(AvnFramebuffer *)fb { |
|||
@synchronized (lock) { |
|||
if(fb->PixelFormat == AvnPixelFormat::kAvnRgb565) |
|||
return E_INVALIDARG; |
|||
if(surface == nil) |
|||
return E_FAIL; |
|||
IOSurfaceRef surf = surface->surface; |
|||
if(IOSurfaceLock(surf, 0, nil)) |
|||
return E_FAIL; |
|||
size_t w = MIN(fb->Width, IOSurfaceGetWidth(surf)); |
|||
size_t h = MIN(fb->Height, IOSurfaceGetHeight(surf)); |
|||
size_t wbytes = w*4; |
|||
size_t sstride = IOSurfaceGetBytesPerRow(surf); |
|||
size_t fstride = fb->Stride; |
|||
char*pSurface = (char*)IOSurfaceGetBaseAddress(surf); |
|||
char*pFb = (char*)fb->Data; |
|||
for(size_t y = 0; y < h; y++) |
|||
{ |
|||
memcpy(pSurface + y*sstride, pFb + y*fstride, wbytes); |
|||
} |
|||
IOSurfaceUnlock(surf, 0, nil); |
|||
[self updateLayer]; |
|||
return S_OK; |
|||
} |
|||
} |
|||
|
|||
-(IAvnGlSurfaceRenderTarget*) createSurfaceRenderTarget |
|||
{ |
|||
return CreateGlRenderTarget(self); |
|||
} |
|||
|
|||
@end |
|||
|
|||
class AvnGlRenderingSession : public ComSingleObject<IAvnGlSurfaceRenderingSession, &IID_IAvnGlSurfaceRenderingSession> |
|||
{ |
|||
ComPtr<IUnknown> _releaseContext; |
|||
IOSurfaceRenderTarget* _target; |
|||
IOSurfaceHolder* _surface; |
|||
public: |
|||
FORWARD_IUNKNOWN() |
|||
AvnGlRenderingSession(IOSurfaceRenderTarget* target, ComPtr<IUnknown> releaseContext) |
|||
{ |
|||
_target = target; |
|||
// This happens in a synchronized block set up by AvnRenderTarget, so we take the current surface for this |
|||
// particular render session |
|||
_surface = _target->surface; |
|||
_releaseContext = releaseContext; |
|||
} |
|||
|
|||
virtual HRESULT GetPixelSize(AvnPixelSize* ret) override |
|||
{ |
|||
if(!_surface) |
|||
return E_FAIL; |
|||
*ret = _surface->size; |
|||
return S_OK; |
|||
} |
|||
|
|||
virtual HRESULT GetScaling(double* ret) override |
|||
{ |
|||
if(!_surface) |
|||
return E_FAIL; |
|||
*ret = _surface->scale; |
|||
return S_OK; |
|||
} |
|||
|
|||
virtual ~AvnGlRenderingSession() |
|||
{ |
|||
[_surface finishDraw]; |
|||
[_target updateLayer]; |
|||
_releaseContext = nil; |
|||
} |
|||
}; |
|||
|
|||
class AvnGlRenderTarget : public ComSingleObject<IAvnGlSurfaceRenderTarget, &IID_IAvnGlSurfaceRenderTarget> |
|||
{ |
|||
IOSurfaceRenderTarget* _target; |
|||
public: |
|||
FORWARD_IUNKNOWN() |
|||
AvnGlRenderTarget(IOSurfaceRenderTarget* target) |
|||
{ |
|||
_target = target; |
|||
} |
|||
|
|||
virtual HRESULT BeginDrawing(IAvnGlSurfaceRenderingSession** ret) override |
|||
{ |
|||
ComPtr<IUnknown> releaseContext; |
|||
@synchronized (_target->lock) { |
|||
if(_target->surface == nil) |
|||
return E_FAIL; |
|||
_target->_glContext->MakeCurrent(releaseContext.getPPV()); |
|||
HRESULT res = [_target->surface prepareForGlRender]; |
|||
if(res) |
|||
return res; |
|||
*ret = new AvnGlRenderingSession(_target, releaseContext); |
|||
return S_OK; |
|||
} |
|||
} |
|||
}; |
|||
|
|||
|
|||
static IAvnGlSurfaceRenderTarget* CreateGlRenderTarget(IOSurfaceRenderTarget* target) |
|||
{ |
|||
return new AvnGlRenderTarget(target); |
|||
} |
|||
@ -1,42 +0,0 @@ |
|||
// Copyright (c) The Avalonia Project. All rights reserved.
|
|||
// Licensed under the MIT license. See licence.md file in the project root for full license information.
|
|||
|
|||
using System; |
|||
using System.Threading; |
|||
using Avalonia.Native.Interop; |
|||
using Avalonia.Rendering; |
|||
|
|||
namespace Avalonia.Native |
|||
{ |
|||
public class AvaloniaNativeDeferredRendererLock : IDeferredRendererLock |
|||
{ |
|||
private readonly IAvnWindowBase _window; |
|||
|
|||
public AvaloniaNativeDeferredRendererLock(IAvnWindowBase window) |
|||
{ |
|||
_window = window; |
|||
} |
|||
|
|||
public IDisposable TryLock() |
|||
{ |
|||
if (_window.TryLock()) |
|||
return new UnlockDisposable(_window); |
|||
return null; |
|||
} |
|||
|
|||
private sealed class UnlockDisposable : IDisposable |
|||
{ |
|||
private IAvnWindowBase _window; |
|||
|
|||
public UnlockDisposable(IAvnWindowBase window) |
|||
{ |
|||
_window = window; |
|||
} |
|||
|
|||
public void Dispose() |
|||
{ |
|||
Interlocked.Exchange(ref _window, null)?.Unlock(); |
|||
} |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue