private static async void SetBackgroundInternal(GLTextureReader reader) { using (reader) { CancellationTokenSource cancelationToken = new CancellationTokenSource(); lock (BackgroundLock) { if (_cancelationToken != null) { _cancelationToken.Cancel(); _cancelationToken.Dispose(); } _cancelationToken = cancelationToken; } GLTexture texture = await reader.ReadTextureAsync(cancelationToken.Token); lock (BackgroundLock) { if (cancelationToken.IsCancellationRequested) { texture.SafeDispose(); } else { SetBackground(texture); } } } }
public static GLTexture HorizontalJoin(GLTexture left, GLTexture right) { Exceptions.CheckArgumentNull(left, "left"); Exceptions.CheckArgumentNull(right, "right"); if (left.Height != right.Height) { throw new ArgumentException("height"); } if (!left.PixelFormat.Equals(right.PixelFormat)) { throw new ArgumentException("pixelFormat"); } int height = left.Height; PixelFormatDescriptor format = left.PixelFormat; GLTexture texture = null; try { using (GLService.AcquireContext()) { texture = new GLTexture(GL.GenTexture(), left.Width + right.Width, height, format); GL.BindTexture(TextureTarget.Texture2D, texture.Id); GL.TexImage2D(TextureTarget.Texture2D, 0, format, texture.Width, texture.Height, 0, format, format, IntPtr.Zero); if (GLService.CheckVersion(4, 3)) { GL.CopyImageSubData(left.Id, ImageTarget.Texture2D, 0, 0, 0, 0, texture.Id, ImageTarget.Texture2D, 0, 0, 0, 0, left.Width, left.Height, 1); GL.CopyImageSubData(right.Id, ImageTarget.Texture2D, 0, 0, 0, 0, texture.Id, ImageTarget.Texture2D, 0, left.Width, 0, 0, right.Width, right.Height, 1); } else { using (GLFramebuffer framebuffer = GLFramebuffer.Create()) { GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer.Id); GL.FramebufferTexture2D(FramebufferTarget.DrawFramebuffer, FramebufferAttachment.ColorAttachment1, TextureTarget.Texture2D, texture.Id, 0); GL.FramebufferTexture2D(FramebufferTarget.ReadFramebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, left.Id, 0); GL.DrawBuffer(DrawBufferMode.ColorAttachment1); GL.BlitFramebuffer(0, 0, left.Width, height, 0, 0, left.Width, height, ClearBufferMask.ColorBufferBit, BlitFramebufferFilter.Linear); GL.FramebufferTexture2D(FramebufferTarget.ReadFramebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, right.Id, 0); GL.DrawBuffer(DrawBufferMode.ColorAttachment1); GL.BlitFramebuffer(0, 0, left.Width, height, left.Width, 0, left.Width * 2, height, ClearBufferMask.ColorBufferBit, BlitFramebufferFilter.Linear); } } GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Repeat); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat); } } catch { texture.SafeDispose(); throw; } return(texture); }
public static void HorizontalSplit(GLTexture layer, out GLTexture leftTexture, out GLTexture rightTexture) { Exceptions.CheckArgumentNull(layer, "layer"); if (layer.Width % 2 != 0) { throw new ArgumentException("layer.Width"); } int width = layer.Width / 2; int height = layer.Height; PixelFormatDescriptor format = layer.PixelFormat; leftTexture = null; rightTexture = null; try { using (GLService.AcquireContext()) { leftTexture = new GLTexture(GL.GenTexture(), width, height, format); rightTexture = new GLTexture(GL.GenTexture(), width, height, format); foreach (GLTexture texture in new[] { leftTexture, rightTexture }) { GL.BindTexture(TextureTarget.Texture2D, texture.Id); GL.TexImage2D(TextureTarget.Texture2D, 0, format, width, height, 0, format, format, IntPtr.Zero); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Repeat); GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat); } if (GLService.CheckVersion(4, 3)) { GL.CopyImageSubData(layer.Id, ImageTarget.Texture2D, 0, 0, 0, 0, leftTexture.Id, ImageTarget.Texture2D, 0, 0, 0, 0, width, height, 1); GL.CopyImageSubData(layer.Id, ImageTarget.Texture2D, 0, width, 0, 0, rightTexture.Id, ImageTarget.Texture2D, 0, 0, 0, 0, width, height, 1); } else { using (GLFramebuffer framebuffer = GLFramebuffer.Create()) { GL.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer.Id); GL.FramebufferTexture2D(FramebufferTarget.ReadFramebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, layer.Id, 0); GL.FramebufferTexture2D(FramebufferTarget.DrawFramebuffer, FramebufferAttachment.ColorAttachment1, TextureTarget.Texture2D, leftTexture.Id, 0); GL.DrawBuffer(DrawBufferMode.ColorAttachment1); GL.BlitFramebuffer(0, 0, width, height, 0, 0, width, height, ClearBufferMask.ColorBufferBit, BlitFramebufferFilter.Linear); GL.FramebufferTexture2D(FramebufferTarget.DrawFramebuffer, FramebufferAttachment.ColorAttachment1, TextureTarget.Texture2D, rightTexture.Id, 0); GL.DrawBuffer(DrawBufferMode.ColorAttachment1); GL.BlitFramebuffer(width, 0, width * 2, height, 0, 0, width, height, ClearBufferMask.ColorBufferBit, BlitFramebufferFilter.Linear); } } } } catch { leftTexture.SafeDispose(); rightTexture.SafeDispose(); throw; } }