Code Style: use "#pragma once" in source directory

This replaces header include guards with `#pragma once`.
A couple of include guards are not removed yet (e.g. `__RNA_TYPES_H__`),
because they are used in other places.

This patch has been generated by P1561 followed by `make format`.

Differential Revision: https://developer.blender.org/D8466

113 files changed, 191 insertions, 383 deletions

diff --git a/source/blender/compositor/operations/COM_AlphaOverKeyOperation.h b/source/blender/compositor/operations/COM_AlphaOverKeyOperation.h
index a4475bc2fbc..de3d6bd1ee0 100644
--- a/source/blender/compositor/operations/COM_AlphaOverKeyOperation.h
+++ b/source/blender/compositor/operations/COM_AlphaOverKeyOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ALPHAOVERKEYOPERATION_H__
-#define __COM_ALPHAOVERKEYOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -36,4 +36,3 @@ class AlphaOverKeyOperation : public MixBaseOperation {
    */
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_AlphaOverMixedOperation.h b/source/blender/compositor/operations/COM_AlphaOverMixedOperation.h
index 88fa3d963f4..22d64807512 100644
--- a/source/blender/compositor/operations/COM_AlphaOverMixedOperation.h
+++ b/source/blender/compositor/operations/COM_AlphaOverMixedOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ALPHAOVERMIXEDOPERATION_H__
-#define __COM_ALPHAOVERMIXEDOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -44,4 +44,3 @@ class AlphaOverMixedOperation : public MixBaseOperation {
     this->m_x = x;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_AlphaOverPremultiplyOperation.h b/source/blender/compositor/operations/COM_AlphaOverPremultiplyOperation.h
index 4ef5f9d996e..bc5cd07baf8 100644
--- a/source/blender/compositor/operations/COM_AlphaOverPremultiplyOperation.h
+++ b/source/blender/compositor/operations/COM_AlphaOverPremultiplyOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ALPHAOVERPREMULTIPLYOPERATION_H__
-#define __COM_ALPHAOVERPREMULTIPLYOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -36,4 +36,3 @@ class AlphaOverPremultiplyOperation : public MixBaseOperation {
    */
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_AntiAliasOperation.h b/source/blender/compositor/operations/COM_AntiAliasOperation.h
index 6141fb92c3f..8600c6dd481 100644
--- a/source/blender/compositor/operations/COM_AntiAliasOperation.h
+++ b/source/blender/compositor/operations/COM_AntiAliasOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ANTIALIASOPERATION_H__
-#define __COM_ANTIALIASOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
 
@@ -56,4 +56,3 @@ class AntiAliasOperation : public NodeOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_BilateralBlurOperation.h b/source/blender/compositor/operations/COM_BilateralBlurOperation.h
index c3482005d8c..a54e830459b 100644
--- a/source/blender/compositor/operations/COM_BilateralBlurOperation.h
+++ b/source/blender/compositor/operations/COM_BilateralBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_BILATERALBLUROPERATION_H__
-#define __COM_BILATERALBLUROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
 
@@ -55,4 +55,3 @@ class BilateralBlurOperation : public NodeOperation, public QualityStepHelper {
     this->m_data = data;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_BlurBaseOperation.h b/source/blender/compositor/operations/COM_BlurBaseOperation.h
index 07893c19126..e4ac8b3c874 100644
--- a/source/blender/compositor/operations/COM_BlurBaseOperation.h
+++ b/source/blender/compositor/operations/COM_BlurBaseOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_BLURBASEOPERATION_H__
-#define __COM_BLURBASEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
 
@@ -77,4 +77,3 @@ class BlurBaseOperation : public NodeOperation, public QualityStepHelper {
 
   void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_BokehBlurOperation.h b/source/blender/compositor/operations/COM_BokehBlurOperation.h
index 4f594f16cb4..e6873a4b70b 100644
--- a/source/blender/compositor/operations/COM_BokehBlurOperation.h
+++ b/source/blender/compositor/operations/COM_BokehBlurOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_BOKEHBLUROPERATION_H__
-#define __COM_BOKEHBLUROPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
@@ -78,4 +77,3 @@ class BokehBlurOperation : public NodeOperation, public QualityStepHelper {
 
   void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_BokehImageOperation.h b/source/blender/compositor/operations/COM_BokehImageOperation.h
index e907559d6e7..db1d3976d44 100644
--- a/source/blender/compositor/operations/COM_BokehImageOperation.h
+++ b/source/blender/compositor/operations/COM_BokehImageOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_BOKEHIMAGEOPERATION_H__
-#define __COM_BOKEHIMAGEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -149,4 +149,3 @@ class BokehImageOperation : public NodeOperation {
     this->m_deleteData = true;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_BoxMaskOperation.h b/source/blender/compositor/operations/COM_BoxMaskOperation.h
index f770922ee7c..070a7f52b1b 100644
--- a/source/blender/compositor/operations/COM_BoxMaskOperation.h
+++ b/source/blender/compositor/operations/COM_BoxMaskOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_BOXMASKOPERATION_H__
-#define __COM_BOXMASKOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class BoxMaskOperation : public NodeOperation {
@@ -63,4 +63,3 @@ class BoxMaskOperation : public NodeOperation {
     this->m_maskType = maskType;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_BrightnessOperation.h b/source/blender/compositor/operations/COM_BrightnessOperation.h
index df6b3ef7b6e..28bd3576201 100644
--- a/source/blender/compositor/operations/COM_BrightnessOperation.h
+++ b/source/blender/compositor/operations/COM_BrightnessOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_BRIGHTNESSOPERATION_H__
-#define __COM_BRIGHTNESSOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class BrightnessOperation : public NodeOperation {
@@ -51,4 +51,3 @@ class BrightnessOperation : public NodeOperation {
 
   void setUsePremultiply(bool use_premultiply);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_CalculateMeanOperation.h b/source/blender/compositor/operations/COM_CalculateMeanOperation.h
index 38d68b2a6fd..aa08555467b 100644
--- a/source/blender/compositor/operations/COM_CalculateMeanOperation.h
+++ b/source/blender/compositor/operations/COM_CalculateMeanOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CALCULATEMEANOPERATION_H__
-#define __COM_CALCULATEMEANOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
 
@@ -67,4 +67,3 @@ class CalculateMeanOperation : public NodeOperation {
  protected:
   void calculateMean(MemoryBuffer *tile);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_CalculateStandardDeviationOperation.h b/source/blender/compositor/operations/COM_CalculateStandardDeviationOperation.h
index 377276777f0..2ab0e82728d 100644
--- a/source/blender/compositor/operations/COM_CalculateStandardDeviationOperation.h
+++ b/source/blender/compositor/operations/COM_CalculateStandardDeviationOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CALCULATESTANDARDDEVIATIONOPERATION_H__
-#define __COM_CALCULATESTANDARDDEVIATIONOPERATION_H__
+#pragma once
+
 #include "COM_CalculateMeanOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
@@ -40,4 +40,3 @@ class CalculateStandardDeviationOperation : public CalculateMeanOperation {
 
   void *initializeTileData(rcti *rect);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ChangeHSVOperation.h b/source/blender/compositor/operations/COM_ChangeHSVOperation.h
index 3898345f922..b4fa1a3bdd4 100644
--- a/source/blender/compositor/operations/COM_ChangeHSVOperation.h
+++ b/source/blender/compositor/operations/COM_ChangeHSVOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CHANGEHSVOPERATION_H__
-#define __COM_CHANGEHSVOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -45,4 +45,3 @@ class ChangeHSVOperation : public NodeOperation {
    */
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ChannelMatteOperation.h b/source/blender/compositor/operations/COM_ChannelMatteOperation.h
index ad88b41cc91..d4c097fe66e 100644
--- a/source/blender/compositor/operations/COM_ChannelMatteOperation.h
+++ b/source/blender/compositor/operations/COM_ChannelMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_CHANNELMATTEOPERATION_H__
-#define __COM_CHANNELMATTEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -70,4 +70,3 @@ class ChannelMatteOperation : public NodeOperation {
     this->m_matte_channel = custom2;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ChromaMatteOperation.h b/source/blender/compositor/operations/COM_ChromaMatteOperation.h
index 58da839823d..5c4ada8de38 100644
--- a/source/blender/compositor/operations/COM_ChromaMatteOperation.h
+++ b/source/blender/compositor/operations/COM_ChromaMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CHROMAMATTEOPERATION_H__
-#define __COM_CHROMAMATTEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -49,4 +49,3 @@ class ChromaMatteOperation : public NodeOperation {
     this->m_settings = nodeChroma;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorBalanceASCCDLOperation.h b/source/blender/compositor/operations/COM_ColorBalanceASCCDLOperation.h
index fd1d51a293b..77ead2f1d26 100644
--- a/source/blender/compositor/operations/COM_ColorBalanceASCCDLOperation.h
+++ b/source/blender/compositor/operations/COM_ColorBalanceASCCDLOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORBALANCEASCCDLOPERATION_H__
-#define __COM_COLORBALANCEASCCDLOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -70,4 +70,3 @@ class ColorBalanceASCCDLOperation : public NodeOperation {
     copy_v3_v3(this->m_slope, slope);
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.h b/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.h
index a2d4b4cd13a..c34591172b9 100644
--- a/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.h
+++ b/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORBALANCELGGOPERATION_H__
-#define __COM_COLORBALANCELGGOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -70,4 +70,3 @@ class ColorBalanceLGGOperation : public NodeOperation {
     copy_v3_v3(this->m_gamma_inv, gamma_inv);
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorCorrectionOperation.h b/source/blender/compositor/operations/COM_ColorCorrectionOperation.h
index ec9632acc7c..66213eb88a4 100644
--- a/source/blender/compositor/operations/COM_ColorCorrectionOperation.h
+++ b/source/blender/compositor/operations/COM_ColorCorrectionOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORCORRECTIONOPERATION_H__
-#define __COM_COLORCORRECTIONOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class ColorCorrectionOperation : public NodeOperation {
@@ -68,4 +68,3 @@ class ColorCorrectionOperation : public NodeOperation {
     this->m_blueChannelEnabled = enabled;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorCurveOperation.h b/source/blender/compositor/operations/COM_ColorCurveOperation.h
index 7869d1c4a56..65a822508b8 100644
--- a/source/blender/compositor/operations/COM_ColorCurveOperation.h
+++ b/source/blender/compositor/operations/COM_ColorCurveOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORCURVEOPERATION_H__
-#define __COM_COLORCURVEOPERATION_H__
+#pragma once
+
 #include "COM_CurveBaseOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_color_types.h"
@@ -88,5 +88,3 @@ class ConstantLevelColorCurveOperation : public CurveBaseOperation {
     copy_v3_v3(this->m_white, white);
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorMatteOperation.h b/source/blender/compositor/operations/COM_ColorMatteOperation.h
index 7e8a0e295e1..bb00c344606 100644
--- a/source/blender/compositor/operations/COM_ColorMatteOperation.h
+++ b/source/blender/compositor/operations/COM_ColorMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORMATTEOPERATION_H__
-#define __COM_COLORMATTEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -49,4 +49,3 @@ class ColorMatteOperation : public NodeOperation {
     this->m_settings = nodeChroma;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorRampOperation.h b/source/blender/compositor/operations/COM_ColorRampOperation.h
index 3e2acda1d10..b4253a3f074 100644
--- a/source/blender/compositor/operations/COM_ColorRampOperation.h
+++ b/source/blender/compositor/operations/COM_ColorRampOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORRAMPOPERATION_H__
-#define __COM_COLORRAMPOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_texture_types.h"
 
@@ -52,4 +52,3 @@ class ColorRampOperation : public NodeOperation {
     this->m_colorBand = colorBand;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ColorSpillOperation.h b/source/blender/compositor/operations/COM_ColorSpillOperation.h
index 73f4f5b045d..560d198693f 100644
--- a/source/blender/compositor/operations/COM_ColorSpillOperation.h
+++ b/source/blender/compositor/operations/COM_ColorSpillOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COLORSPILLOPERATION_H__
-#define __COM_COLORSPILLOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -64,5 +64,3 @@ class ColorSpillOperation : public NodeOperation {
 
   float calculateMapValue(float fac, float *input);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_CompositorOperation.h b/source/blender/compositor/operations/COM_CompositorOperation.h
index 8db8fe00d3c..3633bfd511c 100644
--- a/source/blender/compositor/operations/COM_CompositorOperation.h
+++ b/source/blender/compositor/operations/COM_CompositorOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_COMPOSITOROPERATION_H__
-#define __COM_COMPOSITOROPERATION_H__
+#pragma once
+
 #include "BLI_rect.h"
 #include "BLI_string.h"
 #include "COM_NodeOperation.h"
@@ -123,4 +123,3 @@ class CompositorOperation : public NodeOperation {
     this->m_active = active;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ConvertColorProfileOperation.h b/source/blender/compositor/operations/COM_ConvertColorProfileOperation.h
index 7cc39a47dd0..8fce5ef3e1a 100644
--- a/source/blender/compositor/operations/COM_ConvertColorProfileOperation.h
+++ b/source/blender/compositor/operations/COM_ConvertColorProfileOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CONVERTCOLORPROFILEOPERATION_H__
-#define __COM_CONVERTCOLORPROFILEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -80,4 +80,3 @@ class ConvertColorProfileOperation : public NodeOperation {
     this->m_predivided = predivided;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.h b/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.h
index 7c3e0ed9738..3babcfe4dc3 100644
--- a/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.h
+++ b/source/blender/compositor/operations/COM_ConvertDepthToRadiusOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CONVERTDEPTHTORADIUSOPERATION_H__
-#define __COM_CONVERTDEPTHTORADIUSOPERATION_H__
+#pragma once
+
 #include "COM_FastGaussianBlurOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_object_types.h"
@@ -81,4 +81,3 @@ class ConvertDepthToRadiusOperation : public NodeOperation {
     this->m_blurPostOperation = operation;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ConvertOperation.h b/source/blender/compositor/operations/COM_ConvertOperation.h
index a4cf05372a5..ca026528a38 100644
--- a/source/blender/compositor/operations/COM_ConvertOperation.h
+++ b/source/blender/compositor/operations/COM_ConvertOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CONVERTOPERATION_H__
-#define __COM_CONVERTOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -183,5 +182,3 @@ class CombineChannelsOperation : public NodeOperation {
   void initExecution();
   void deinitExecution();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_ConvolutionEdgeFilterOperation.h b/source/blender/compositor/operations/COM_ConvolutionEdgeFilterOperation.h
index 17509b018bf..ab4b8a1dad1 100644
--- a/source/blender/compositor/operations/COM_ConvolutionEdgeFilterOperation.h
+++ b/source/blender/compositor/operations/COM_ConvolutionEdgeFilterOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CONVOLUTIONEDGEFILTEROPERATION_H__
-#define __COM_CONVOLUTIONEDGEFILTEROPERATION_H__
+#pragma once
 
 #include "COM_ConvolutionFilterOperation.h"
 
@@ -26,5 +25,3 @@ class ConvolutionEdgeFilterOperation : public ConvolutionFilterOperation {
   ConvolutionEdgeFilterOperation();
   void executePixel(float output[4], int x, int y, void *data);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_ConvolutionFilterOperation.h b/source/blender/compositor/operations/COM_ConvolutionFilterOperation.h
index 78db5a5ae9d..d178b0a7418 100644
--- a/source/blender/compositor/operations/COM_ConvolutionFilterOperation.h
+++ b/source/blender/compositor/operations/COM_ConvolutionFilterOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CONVOLUTIONFILTEROPERATION_H__
-#define __COM_CONVOLUTIONFILTEROPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -43,5 +42,3 @@ class ConvolutionFilterOperation : public NodeOperation {
   void initExecution();
   void deinitExecution();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_CropOperation.h b/source/blender/compositor/operations/COM_CropOperation.h
index 36c18d29e92..f20664f0501 100644
--- a/source/blender/compositor/operations/COM_CropOperation.h
+++ b/source/blender/compositor/operations/COM_CropOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CROPOPERATION_H__
-#define __COM_CROPOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -64,4 +63,3 @@ class CropImageOperation : public CropBaseOperation {
   void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_CryptomatteOperation.h b/source/blender/compositor/operations/COM_CryptomatteOperation.h
index 459d8b65f12..8c5a3134720 100644
--- a/source/blender/compositor/operations/COM_CryptomatteOperation.h
+++ b/source/blender/compositor/operations/COM_CryptomatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2018, Blender Foundation.
  */
 
-#ifndef __COM_CRYPTOMATTEOPERATION_H__
-#define __COM_CRYPTOMATTEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class CryptomatteOperation : public NodeOperation {
@@ -34,4 +34,3 @@ class CryptomatteOperation : public NodeOperation {
 
   void addObjectIndex(float objectIndex);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_CurveBaseOperation.h b/source/blender/compositor/operations/COM_CurveBaseOperation.h
index f42ce3c366f..63e667cfe12 100644
--- a/source/blender/compositor/operations/COM_CurveBaseOperation.h
+++ b/source/blender/compositor/operations/COM_CurveBaseOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_CURVEBASEOPERATION_H__
-#define __COM_CURVEBASEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_color_types.h"
 
@@ -40,4 +40,3 @@ class CurveBaseOperation : public NodeOperation {
 
   void setCurveMapping(CurveMapping *mapping);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DenoiseOperation.h b/source/blender/compositor/operations/COM_DenoiseOperation.h
index 6a53eead65c..5af6e16c958 100644
--- a/source/blender/compositor/operations/COM_DenoiseOperation.h
+++ b/source/blender/compositor/operations/COM_DenoiseOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2019, Blender Foundation.
  */
 
-#ifndef __COM_DENOISEOPERATION_H__
-#define __COM_DENOISEOPERATION_H__
+#pragma once
 
 #include "COM_SingleThreadedOperation.h"
 #include "DNA_node_types.h"
@@ -65,5 +64,3 @@ class DenoiseOperation : public SingleThreadedOperation {
 
   MemoryBuffer *createMemoryBuffer(rcti *rect);
 };
-
-#endif /* __COM_DENOISEOPERATION_H__ */
diff --git a/source/blender/compositor/operations/COM_DespeckleOperation.h b/source/blender/compositor/operations/COM_DespeckleOperation.h
index 280948b7fbe..af37c276bd2 100644
--- a/source/blender/compositor/operations/COM_DespeckleOperation.h
+++ b/source/blender/compositor/operations/COM_DespeckleOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DESPECKLEOPERATION_H__
-#define __COM_DESPECKLEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class DespeckleOperation : public NodeOperation {
@@ -51,5 +51,3 @@ class DespeckleOperation : public NodeOperation {
   void initExecution();
   void deinitExecution();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_DifferenceMatteOperation.h b/source/blender/compositor/operations/COM_DifferenceMatteOperation.h
index e96e212e511..beaa4400712 100644
--- a/source/blender/compositor/operations/COM_DifferenceMatteOperation.h
+++ b/source/blender/compositor/operations/COM_DifferenceMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DIFFERENCEMATTEOPERATION_H__
-#define __COM_DIFFERENCEMATTEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -49,4 +49,3 @@ class DifferenceMatteOperation : public NodeOperation {
     this->m_settings = nodeChroma;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DilateErodeOperation.h b/source/blender/compositor/operations/COM_DilateErodeOperation.h
index bd7e0938c58..95a799ab648 100644
--- a/source/blender/compositor/operations/COM_DilateErodeOperation.h
+++ b/source/blender/compositor/operations/COM_DilateErodeOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DILATEERODEOPERATION_H__
-#define __COM_DILATEERODEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class DilateErodeThresholdOperation : public NodeOperation {
@@ -180,5 +180,3 @@ class ErodeStepOperation : public DilateStepOperation {
 
   void *initializeTileData(rcti *rect);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_DirectionalBlurOperation.h b/source/blender/compositor/operations/COM_DirectionalBlurOperation.h
index f8b7bab010b..57fc0bb7fa3 100644
--- a/source/blender/compositor/operations/COM_DirectionalBlurOperation.h
+++ b/source/blender/compositor/operations/COM_DirectionalBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DIRECTIONALBLUROPERATION_H__
-#define __COM_DIRECTIONALBLUROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
 
@@ -64,4 +64,3 @@ class DirectionalBlurOperation : public NodeOperation, public QualityStepHelper
                      list<cl_mem> *clMemToCleanUp,
                      list<cl_kernel> *clKernelsToCleanUp);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DisplaceOperation.h b/source/blender/compositor/operations/COM_DisplaceOperation.h
index 4e44572fcf2..ee06bf320a6 100644
--- a/source/blender/compositor/operations/COM_DisplaceOperation.h
+++ b/source/blender/compositor/operations/COM_DisplaceOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DISPLACEOPERATION_H__
-#define __COM_DISPLACEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class DisplaceOperation : public NodeOperation {
@@ -64,4 +64,3 @@ class DisplaceOperation : public NodeOperation {
   bool read_displacement(
       float x, float y, float xscale, float yscale, const float origin[2], float &r_u, float &r_v);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DisplaceSimpleOperation.h b/source/blender/compositor/operations/COM_DisplaceSimpleOperation.h
index 6d4d6047137..6930985b0e5 100644
--- a/source/blender/compositor/operations/COM_DisplaceSimpleOperation.h
+++ b/source/blender/compositor/operations/COM_DisplaceSimpleOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_DISPLACESIMPLEOPERATION_H__
-#define __COM_DISPLACESIMPLEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class DisplaceSimpleOperation : public NodeOperation {
@@ -58,4 +58,3 @@ class DisplaceSimpleOperation : public NodeOperation {
    */
   void deinitExecution();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.h b/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.h
index c64c6da8d24..d99ab262c18 100644
--- a/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.h
+++ b/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DISTANCERGBMATTEOPERATION_H__
-#define __COM_DISTANCERGBMATTEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -51,4 +51,3 @@ class DistanceRGBMatteOperation : public NodeOperation {
     this->m_settings = nodeChroma;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DistanceYCCMatteOperation.h b/source/blender/compositor/operations/COM_DistanceYCCMatteOperation.h
index 1cb477bc05d..e9b2cda6251 100644
--- a/source/blender/compositor/operations/COM_DistanceYCCMatteOperation.h
+++ b/source/blender/compositor/operations/COM_DistanceYCCMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DISTANCEYCCMATTEOPERATION_H__
-#define __COM_DISTANCEYCCMATTEOPERATION_H__
+#pragma once
+
 #include "COM_DistanceRGBMatteOperation.h"
 #include "COM_MixOperation.h"
 
@@ -35,4 +35,3 @@ class DistanceYCCMatteOperation : public DistanceRGBMatteOperation {
    */
   DistanceYCCMatteOperation();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_DotproductOperation.h b/source/blender/compositor/operations/COM_DotproductOperation.h
index 9ef9753f4c9..63b735ce30f 100644
--- a/source/blender/compositor/operations/COM_DotproductOperation.h
+++ b/source/blender/compositor/operations/COM_DotproductOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DOTPRODUCTOPERATION_H__
-#define __COM_DOTPRODUCTOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -33,5 +32,3 @@ class DotproductOperation : public NodeOperation {
   void initExecution();
   void deinitExecution();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_DoubleEdgeMaskOperation.h b/source/blender/compositor/operations/COM_DoubleEdgeMaskOperation.h
index 40cfa370cb7..0c77e83daec 100644
--- a/source/blender/compositor/operations/COM_DoubleEdgeMaskOperation.h
+++ b/source/blender/compositor/operations/COM_DoubleEdgeMaskOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_DOUBLEEDGEMASKOPERATION_H__
-#define __COM_DOUBLEEDGEMASKOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class DoubleEdgeMaskOperation : public NodeOperation {
@@ -65,4 +65,3 @@ class DoubleEdgeMaskOperation : public NodeOperation {
     this->m_keepInside = keepInside;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_EllipseMaskOperation.h b/source/blender/compositor/operations/COM_EllipseMaskOperation.h
index b73a35a5452..2e6b1f782a1 100644
--- a/source/blender/compositor/operations/COM_EllipseMaskOperation.h
+++ b/source/blender/compositor/operations/COM_EllipseMaskOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ELLIPSEMASKOPERATION_H__
-#define __COM_ELLIPSEMASKOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class EllipseMaskOperation : public NodeOperation {
@@ -63,4 +63,3 @@ class EllipseMaskOperation : public NodeOperation {
     this->m_maskType = maskType;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_FastGaussianBlurOperation.h b/source/blender/compositor/operations/COM_FastGaussianBlurOperation.h
index 22f9a6f9cf2..6ab6474c20a 100644
--- a/source/blender/compositor/operations/COM_FastGaussianBlurOperation.h
+++ b/source/blender/compositor/operations/COM_FastGaussianBlurOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_FASTGAUSSIANBLUROPERATION_H__
-#define __COM_FASTGAUSSIANBLUROPERATION_H__
+#pragma once
 
 #include "COM_BlurBaseOperation.h"
 #include "DNA_node_types.h"
@@ -80,5 +79,3 @@ class FastGaussianBlurValueOperation : public NodeOperation {
     this->m_overlay = overlay;
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_FlipOperation.h b/source/blender/compositor/operations/COM_FlipOperation.h
index 2d00c50dc8a..711b51261e6 100644
--- a/source/blender/compositor/operations/COM_FlipOperation.h
+++ b/source/blender/compositor/operations/COM_FlipOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_FLIPOPERATION_H__
-#define __COM_FLIPOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -45,5 +44,3 @@ class FlipOperation : public NodeOperation {
     this->m_flipY = flipY;
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_GammaCorrectOperation.h b/source/blender/compositor/operations/COM_GammaCorrectOperation.h
index 26e31df880f..be57e279ac8 100644
--- a/source/blender/compositor/operations/COM_GammaCorrectOperation.h
+++ b/source/blender/compositor/operations/COM_GammaCorrectOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAMMACORRECTOPERATION_H__
-#define __COM_GAMMACORRECTOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class GammaCorrectOperation : public NodeOperation {
@@ -71,5 +71,3 @@ class GammaUncorrectOperation : public NodeOperation {
    */
   void deinitExecution();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_GammaOperation.h b/source/blender/compositor/operations/COM_GammaOperation.h
index ba0b84db931..493fdb1f889 100644
--- a/source/blender/compositor/operations/COM_GammaOperation.h
+++ b/source/blender/compositor/operations/COM_GammaOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAMMAOPERATION_H__
-#define __COM_GAMMAOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class GammaOperation : public NodeOperation {
@@ -46,4 +46,3 @@ class GammaOperation : public NodeOperation {
    */
   void deinitExecution();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GaussianAlphaXBlurOperation.h b/source/blender/compositor/operations/COM_GaussianAlphaXBlurOperation.h
index 9de75ff53a7..a8e1ddfb885 100644
--- a/source/blender/compositor/operations/COM_GaussianAlphaXBlurOperation.h
+++ b/source/blender/compositor/operations/COM_GaussianAlphaXBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAUSSIANALPHAXBLUROPERATION_H__
-#define __COM_GAUSSIANALPHAXBLUROPERATION_H__
+#pragma once
+
 #include "COM_BlurBaseOperation.h"
 #include "COM_NodeOperation.h"
 
@@ -65,4 +65,3 @@ class GaussianAlphaXBlurOperation : public BlurBaseOperation {
     this->m_falloff = falloff;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GaussianAlphaYBlurOperation.h b/source/blender/compositor/operations/COM_GaussianAlphaYBlurOperation.h
index 44689922bfc..df34f15fccc 100644
--- a/source/blender/compositor/operations/COM_GaussianAlphaYBlurOperation.h
+++ b/source/blender/compositor/operations/COM_GaussianAlphaYBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAUSSIANALPHAYBLUROPERATION_H__
-#define __COM_GAUSSIANALPHAYBLUROPERATION_H__
+#pragma once
+
 #include "COM_BlurBaseOperation.h"
 #include "COM_NodeOperation.h"
 
@@ -65,4 +65,3 @@ class GaussianAlphaYBlurOperation : public BlurBaseOperation {
     this->m_falloff = falloff;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GaussianBokehBlurOperation.h b/source/blender/compositor/operations/COM_GaussianBokehBlurOperation.h
index 3aa380853bd..b4b5c0e8b2f 100644
--- a/source/blender/compositor/operations/COM_GaussianBokehBlurOperation.h
+++ b/source/blender/compositor/operations/COM_GaussianBokehBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAUSSIANBOKEHBLUROPERATION_H__
-#define __COM_GAUSSIANBOKEHBLUROPERATION_H__
+#pragma once
+
 #include "COM_BlurBaseOperation.h"
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
@@ -75,5 +75,3 @@ class GaussianBlurReferenceOperation : public BlurBaseOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_GaussianXBlurOperation.h b/source/blender/compositor/operations/COM_GaussianXBlurOperation.h
index c5c08df8ce7..1bd6ef20a48 100644
--- a/source/blender/compositor/operations/COM_GaussianXBlurOperation.h
+++ b/source/blender/compositor/operations/COM_GaussianXBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAUSSIANXBLUROPERATION_H__
-#define __COM_GAUSSIANXBLUROPERATION_H__
+#pragma once
+
 #include "COM_BlurBaseOperation.h"
 #include "COM_NodeOperation.h"
 
@@ -65,4 +65,3 @@ class GaussianXBlurOperation : public BlurBaseOperation {
     this->setOpenCL(m_data.sizex >= 128);
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GaussianYBlurOperation.h b/source/blender/compositor/operations/COM_GaussianYBlurOperation.h
index 92154aa7518..a9af28791f8 100644
--- a/source/blender/compositor/operations/COM_GaussianYBlurOperation.h
+++ b/source/blender/compositor/operations/COM_GaussianYBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GAUSSIANYBLUROPERATION_H__
-#define __COM_GAUSSIANYBLUROPERATION_H__
+#pragma once
+
 #include "COM_BlurBaseOperation.h"
 #include "COM_NodeOperation.h"
 
@@ -65,4 +65,3 @@ class GaussianYBlurOperation : public BlurBaseOperation {
     this->setOpenCL(m_data.sizex >= 128);
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GlareBaseOperation.h b/source/blender/compositor/operations/COM_GlareBaseOperation.h
index ba2b9a8f4b8..aabb76f5cf0 100644
--- a/source/blender/compositor/operations/COM_GlareBaseOperation.h
+++ b/source/blender/compositor/operations/COM_GlareBaseOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GLAREBASEOPERATION_H__
-#define __COM_GLAREBASEOPERATION_H__
+#pragma once
 
 #include "COM_SingleThreadedOperation.h"
 #include "DNA_node_types.h"
@@ -74,4 +73,3 @@ class GlareBaseOperation : public SingleThreadedOperation {
 
   MemoryBuffer *createMemoryBuffer(rcti *rect);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GlareFogGlowOperation.h b/source/blender/compositor/operations/COM_GlareFogGlowOperation.h
index dae0b714e56..9084f27052e 100644
--- a/source/blender/compositor/operations/COM_GlareFogGlowOperation.h
+++ b/source/blender/compositor/operations/COM_GlareFogGlowOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GLAREFOGGLOWOPERATION_H__
-#define __COM_GLAREFOGGLOWOPERATION_H__
+#pragma once
+
 #include "COM_GlareBaseOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
@@ -31,4 +31,3 @@ class GlareFogGlowOperation : public GlareBaseOperation {
  protected:
   void generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GlareGhostOperation.h b/source/blender/compositor/operations/COM_GlareGhostOperation.h
index c0b41762c8a..8ecf8da3385 100644
--- a/source/blender/compositor/operations/COM_GlareGhostOperation.h
+++ b/source/blender/compositor/operations/COM_GlareGhostOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GLAREGHOSTOPERATION_H__
-#define __COM_GLAREGHOSTOPERATION_H__
+#pragma once
+
 #include "COM_GlareBaseOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
@@ -31,4 +31,3 @@ class GlareGhostOperation : public GlareBaseOperation {
  protected:
   void generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GlareSimpleStarOperation.h b/source/blender/compositor/operations/COM_GlareSimpleStarOperation.h
index b6e2e499f64..0f5913fcef9 100644
--- a/source/blender/compositor/operations/COM_GlareSimpleStarOperation.h
+++ b/source/blender/compositor/operations/COM_GlareSimpleStarOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GLARESIMPLESTAROPERATION_H__
-#define __COM_GLARESIMPLESTAROPERATION_H__
+#pragma once
+
 #include "COM_GlareBaseOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
@@ -31,4 +31,3 @@ class GlareSimpleStarOperation : public GlareBaseOperation {
  protected:
   void generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GlareStreaksOperation.h b/source/blender/compositor/operations/COM_GlareStreaksOperation.h
index 9f137f90b71..df31981170d 100644
--- a/source/blender/compositor/operations/COM_GlareStreaksOperation.h
+++ b/source/blender/compositor/operations/COM_GlareStreaksOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GLARESTREAKSOPERATION_H__
-#define __COM_GLARESTREAKSOPERATION_H__
+#pragma once
+
 #include "COM_GlareBaseOperation.h"
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
@@ -31,4 +31,3 @@ class GlareStreaksOperation : public GlareBaseOperation {
  protected:
   void generateGlare(float *data, MemoryBuffer *inputTile, NodeGlare *settings);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_GlareThresholdOperation.h b/source/blender/compositor/operations/COM_GlareThresholdOperation.h
index 385111cdf0b..e4ac36f2053 100644
--- a/source/blender/compositor/operations/COM_GlareThresholdOperation.h
+++ b/source/blender/compositor/operations/COM_GlareThresholdOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_GLARETHRESHOLDOPERATION_H__
-#define __COM_GLARETHRESHOLDOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_light_types.h"
 
@@ -58,4 +58,3 @@ class GlareThresholdOperation : public NodeOperation {
 
   void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_HueSaturationValueCorrectOperation.h b/source/blender/compositor/operations/COM_HueSaturationValueCorrectOperation.h
index 0624a5c022f..f29a932d7f8 100644
--- a/source/blender/compositor/operations/COM_HueSaturationValueCorrectOperation.h
+++ b/source/blender/compositor/operations/COM_HueSaturationValueCorrectOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_HUESATURATIONVALUECORRECTOPERATION_H__
-#define __COM_HUESATURATIONVALUECORRECTOPERATION_H__
+#pragma once
+
 #include "COM_CurveBaseOperation.h"
 #include "COM_NodeOperation.h"
 
@@ -46,4 +46,3 @@ class HueSaturationValueCorrectOperation : public CurveBaseOperation {
    */
   void deinitExecution();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_IDMaskOperation.h b/source/blender/compositor/operations/COM_IDMaskOperation.h
index b3a40106b9d..abd2a719371 100644
--- a/source/blender/compositor/operations/COM_IDMaskOperation.h
+++ b/source/blender/compositor/operations/COM_IDMaskOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_IDMASKOPERATION_H__
-#define __COM_IDMASKOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class IDMaskOperation : public NodeOperation {
@@ -35,4 +35,3 @@ class IDMaskOperation : public NodeOperation {
     this->m_objectIndex = objectIndex;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ImageOperation.h b/source/blender/compositor/operations/COM_ImageOperation.h
index 3e081ee0000..fcffdc7aae9 100644
--- a/source/blender/compositor/operations/COM_ImageOperation.h
+++ b/source/blender/compositor/operations/COM_ImageOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_IMAGEOPERATION_H__
-#define __COM_IMAGEOPERATION_H__
+#pragma once
 
 #include "BKE_image.h"
 #include "BLI_listbase.h"
@@ -103,4 +102,3 @@ class ImageDepthOperation : public BaseImageOperation {
   ImageDepthOperation();
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_InpaintOperation.h b/source/blender/compositor/operations/COM_InpaintOperation.h
index 2fef7c590ea..12523d5f064 100644
--- a/source/blender/compositor/operations/COM_InpaintOperation.h
+++ b/source/blender/compositor/operations/COM_InpaintOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_INPAINTOPERATION_H__
-#define __COM_INPAINTOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class InpaintSimpleOperation : public NodeOperation {
@@ -72,5 +72,3 @@ class InpaintSimpleOperation : public NodeOperation {
   bool next_pixel(int &x, int &y, int &curr, int iters);
   void pix_step(int x, int y);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_InvertOperation.h b/source/blender/compositor/operations/COM_InvertOperation.h
index 39161455a76..5399122ab62 100644
--- a/source/blender/compositor/operations/COM_InvertOperation.h
+++ b/source/blender/compositor/operations/COM_InvertOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_INVERTOPERATION_H__
-#define __COM_INVERTOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class InvertOperation : public NodeOperation {
@@ -58,4 +58,3 @@ class InvertOperation : public NodeOperation {
     this->m_alpha = alpha;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_KeyingBlurOperation.h b/source/blender/compositor/operations/COM_KeyingBlurOperation.h
index 0e45f1c32b8..6a2b43a6cd4 100644
--- a/source/blender/compositor/operations/COM_KeyingBlurOperation.h
+++ b/source/blender/compositor/operations/COM_KeyingBlurOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_KEYINGBLUROPERATION_H__
-#define __COM_KEYINGBLUROPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -54,5 +53,3 @@ class KeyingBlurOperation : public NodeOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_KeyingClipOperation.h b/source/blender/compositor/operations/COM_KeyingClipOperation.h
index 8237c443cf2..9d876966e96 100644
--- a/source/blender/compositor/operations/COM_KeyingClipOperation.h
+++ b/source/blender/compositor/operations/COM_KeyingClipOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_KEYINGCLIPOPERATION_H__
-#define __COM_KEYINGCLIPOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -68,5 +67,3 @@ class KeyingClipOperation : public NodeOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_KeyingDespillOperation.h b/source/blender/compositor/operations/COM_KeyingDespillOperation.h
index eb43a478e50..32df7939c43 100644
--- a/source/blender/compositor/operations/COM_KeyingDespillOperation.h
+++ b/source/blender/compositor/operations/COM_KeyingDespillOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_KEYINGDESPILLOPERATION_H__
-#define __COM_KEYINGDESPILLOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -48,5 +47,3 @@ class KeyingDespillOperation : public NodeOperation {
 
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_KeyingOperation.h b/source/blender/compositor/operations/COM_KeyingOperation.h
index 81d23e76b2a..946d7bdc1f7 100644
--- a/source/blender/compositor/operations/COM_KeyingOperation.h
+++ b/source/blender/compositor/operations/COM_KeyingOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_KEYINGOPERATION_H__
-#define __COM_KEYINGOPERATION_H__
+#pragma once
 
 #include <string.h>
 
@@ -48,5 +47,3 @@ class KeyingOperation : public NodeOperation {
 
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_KeyingScreenOperation.h b/source/blender/compositor/operations/COM_KeyingScreenOperation.h
index 593e902117b..595301bb951 100644
--- a/source/blender/compositor/operations/COM_KeyingScreenOperation.h
+++ b/source/blender/compositor/operations/COM_KeyingScreenOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_KEYINGSCREENOPERATION_H__
-#define __COM_KEYINGSCREENOPERATION_H__
+#pragma once
 
 #include <string.h>
 
@@ -83,5 +82,3 @@ class KeyingScreenOperation : public NodeOperation {
 
   void executePixel(float output[4], int x, int y, void *data);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_LuminanceMatteOperation.h b/source/blender/compositor/operations/COM_LuminanceMatteOperation.h
index 2df7847f7ff..2b77b3cde85 100644
--- a/source/blender/compositor/operations/COM_LuminanceMatteOperation.h
+++ b/source/blender/compositor/operations/COM_LuminanceMatteOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_LUMINANCEMATTEOPERATION_H__
-#define __COM_LUMINANCEMATTEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -48,4 +48,3 @@ class LuminanceMatteOperation : public NodeOperation {
     this->m_settings = nodeChroma;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_MapRangeOperation.h b/source/blender/compositor/operations/COM_MapRangeOperation.h
index 55b5cc7453c..8656b5539a0 100644
--- a/source/blender/compositor/operations/COM_MapRangeOperation.h
+++ b/source/blender/compositor/operations/COM_MapRangeOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_MAPRANGEOPERATION_H__
-#define __COM_MAPRANGEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_texture_types.h"
 
@@ -67,4 +67,3 @@ class MapRangeOperation : public NodeOperation {
     this->m_useClamp = value;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_MapUVOperation.h b/source/blender/compositor/operations/COM_MapUVOperation.h
index 64e17b180b4..639b61847c4 100644
--- a/source/blender/compositor/operations/COM_MapUVOperation.h
+++ b/source/blender/compositor/operations/COM_MapUVOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MAPUVOPERATION_H__
-#define __COM_MAPUVOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class MapUVOperation : public NodeOperation {
@@ -65,5 +65,3 @@ class MapUVOperation : public NodeOperation {
  private:
   bool read_uv(float x, float y, float &r_u, float &r_v, float &r_alpha);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_MapValueOperation.h b/source/blender/compositor/operations/COM_MapValueOperation.h
index 81071d78cd7..cdbc98bd2a5 100644
--- a/source/blender/compositor/operations/COM_MapValueOperation.h
+++ b/source/blender/compositor/operations/COM_MapValueOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MAPVALUEOPERATION_H__
-#define __COM_MAPVALUEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_texture_types.h"
 
@@ -62,4 +62,3 @@ class MapValueOperation : public NodeOperation {
     this->m_settings = settings;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_MaskOperation.h b/source/blender/compositor/operations/COM_MaskOperation.h
index 45363ea5220..eba14d10373 100644
--- a/source/blender/compositor/operations/COM_MaskOperation.h
+++ b/source/blender/compositor/operations/COM_MaskOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_MASKOPERATION_H__
-#define __COM_MASKOPERATION_H__
+#pragma once
 
 #include "BLI_listbase.h"
 #include "COM_NodeOperation.h"
@@ -94,5 +93,3 @@ class MaskOperation : public NodeOperation {
 
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_MathBaseOperation.h b/source/blender/compositor/operations/COM_MathBaseOperation.h
index 199b59d8649..f844f668f08 100644
--- a/source/blender/compositor/operations/COM_MathBaseOperation.h
+++ b/source/blender/compositor/operations/COM_MathBaseOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MATHBASEOPERATION_H__
-#define __COM_MATHBASEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -372,4 +372,3 @@ class MathSmoothMaxOperation : public MathBaseOperation {
   }
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_MixOperation.h b/source/blender/compositor/operations/COM_MixOperation.h
index cea0e59b541..e597e8af63a 100644
--- a/source/blender/compositor/operations/COM_MixOperation.h
+++ b/source/blender/compositor/operations/COM_MixOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MIXOPERATION_H__
-#define __COM_MIXOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -193,5 +193,3 @@ class MixValueOperation : public MixBaseOperation {
   MixValueOperation();
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_MovieClipAttributeOperation.h b/source/blender/compositor/operations/COM_MovieClipAttributeOperation.h
index 8a95293b470..449e5d01a37 100644
--- a/source/blender/compositor/operations/COM_MovieClipAttributeOperation.h
+++ b/source/blender/compositor/operations/COM_MovieClipAttributeOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MOVIECLIPATTRIBUTEOPERATION_H__
-#define __COM_MOVIECLIPATTRIBUTEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_movieclip_types.h"
 
@@ -70,4 +70,3 @@ class MovieClipAttributeOperation : public NodeOperation {
     this->m_invert = invert;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_MovieClipOperation.h b/source/blender/compositor/operations/COM_MovieClipOperation.h
index 7ae85eac25e..8897f85f77c 100644
--- a/source/blender/compositor/operations/COM_MovieClipOperation.h
+++ b/source/blender/compositor/operations/COM_MovieClipOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MOVIECLIPOPERATION_H__
-#define __COM_MOVIECLIPOPERATION_H__
+#pragma once
 
 #include "BLI_listbase.h"
 #include "COM_NodeOperation.h"
@@ -77,5 +76,3 @@ class MovieClipAlphaOperation : public MovieClipBaseOperation {
   MovieClipAlphaOperation();
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_MovieDistortionOperation.h b/source/blender/compositor/operations/COM_MovieDistortionOperation.h
index 799c6385a10..f11ce485f97 100644
--- a/source/blender/compositor/operations/COM_MovieDistortionOperation.h
+++ b/source/blender/compositor/operations/COM_MovieDistortionOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MOVIEDISTORTIONOPERATION_H__
-#define __COM_MOVIEDISTORTIONOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 #include "DNA_movieclip_types.h"
@@ -58,5 +57,3 @@ class MovieDistortionOperation : public NodeOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_MultilayerImageOperation.h b/source/blender/compositor/operations/COM_MultilayerImageOperation.h
index 10c475ced4d..adfcc975ade 100644
--- a/source/blender/compositor/operations/COM_MultilayerImageOperation.h
+++ b/source/blender/compositor/operations/COM_MultilayerImageOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_MULTILAYERIMAGEOPERATION_H__
-#define __COM_MULTILAYERIMAGEOPERATION_H__
+#pragma once
 
 #include "COM_ImageOperation.h"
 
@@ -67,5 +66,3 @@ class MultilayerVectorOperation : public MultilayerBaseOperation {
   }
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_NormalizeOperation.h b/source/blender/compositor/operations/COM_NormalizeOperation.h
index a38e79bb0ab..58c03e633e2 100644
--- a/source/blender/compositor/operations/COM_NormalizeOperation.h
+++ b/source/blender/compositor/operations/COM_NormalizeOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_NORMALIZEOPERATION_H__
-#define __COM_NORMALIZEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
 
@@ -63,5 +63,3 @@ class NormalizeOperation : public NodeOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_OutputFileMultiViewOperation.h b/source/blender/compositor/operations/COM_OutputFileMultiViewOperation.h
index 609448c0bcb..1deaf121173 100644
--- a/source/blender/compositor/operations/COM_OutputFileMultiViewOperation.h
+++ b/source/blender/compositor/operations/COM_OutputFileMultiViewOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2015, Blender Foundation.
  */
 
-#ifndef __COM_OUTPUTFILEMULTIVIEWOPERATION_H__
-#define __COM_OUTPUTFILEMULTIVIEWOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "COM_OutputFileOperation.h"
 
@@ -77,5 +77,3 @@ class OutputStereoOperation : public OutputSingleLayerOperation {
   void *get_handle(const char *filename);
   void deinitExecution();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_OutputFileOperation.h b/source/blender/compositor/operations/COM_OutputFileOperation.h
index d00d1d0dc0d..b2454e17e3f 100644
--- a/source/blender/compositor/operations/COM_OutputFileOperation.h
+++ b/source/blender/compositor/operations/COM_OutputFileOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_OUTPUTFILEOPERATION_H__
-#define __COM_OUTPUTFILEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 #include "BLI_path_util.h"
@@ -140,5 +140,3 @@ void free_exr_channels(void *exrhandle,
                        const char *layerName,
                        const DataType datatype);
 int get_datatype_size(DataType datatype);
-
-#endif
diff --git a/source/blender/compositor/operations/COM_PixelateOperation.h b/source/blender/compositor/operations/COM_PixelateOperation.h
index 86aab26ee00..c7595756d39 100644
--- a/source/blender/compositor/operations/COM_PixelateOperation.h
+++ b/source/blender/compositor/operations/COM_PixelateOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_PIXELATEOPERATION_H__
-#define __COM_PIXELATEOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -61,5 +60,3 @@ class PixelateOperation : public NodeOperation {
    */
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_PlaneCornerPinOperation.h b/source/blender/compositor/operations/COM_PlaneCornerPinOperation.h
index 444616e13f2..1e892465db8 100644
--- a/source/blender/compositor/operations/COM_PlaneCornerPinOperation.h
+++ b/source/blender/compositor/operations/COM_PlaneCornerPinOperation.h
@@ -15,8 +15,7 @@
  * Copyright 2014, Blender Foundation.
  */
 
-#ifndef __COM_PLANECORNERPINOPERATION_H__
-#define __COM_PLANECORNERPINOPERATION_H__
+#pragma once
 
 #include <string.h>
 
@@ -59,5 +58,3 @@ class PlaneCornerPinWarpImageOperation : public PlaneDistortWarpImageOperation {
                                         ReadBufferOperation *readOperation,
                                         rcti *output);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_PlaneDistortCommonOperation.h b/source/blender/compositor/operations/COM_PlaneDistortCommonOperation.h
index 35e7745cb5d..6cc9456c13f 100644
--- a/source/blender/compositor/operations/COM_PlaneDistortCommonOperation.h
+++ b/source/blender/compositor/operations/COM_PlaneDistortCommonOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2013, Blender Foundation.
  */
 
-#ifndef __COM_PLANEDISTORTCOMMONOPERATION_H__
-#define __COM_PLANEDISTORTCOMMONOPERATION_H__
+#pragma once
 
 #include <string.h>
 
@@ -97,5 +96,3 @@ class PlaneDistortMaskOperation : public NodeOperation {
     this->m_motion_blur_shutter = shutter;
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_PlaneTrackOperation.h b/source/blender/compositor/operations/COM_PlaneTrackOperation.h
index 875c8ce8fa0..fc0a0873d5f 100644
--- a/source/blender/compositor/operations/COM_PlaneTrackOperation.h
+++ b/source/blender/compositor/operations/COM_PlaneTrackOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2013, Blender Foundation.
  */
 
-#ifndef __COM_PLANETRACKOPERATION_H__
-#define __COM_PLANETRACKOPERATION_H__
+#pragma once
 
 #include <string.h>
 
@@ -96,5 +95,3 @@ class PlaneTrackWarpImageOperation : public PlaneDistortWarpImageOperation,
     NodeOperation::determineResolution(temp, resolution);
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_PreviewOperation.h b/source/blender/compositor/operations/COM_PreviewOperation.h
index f31bd533971..eca50c5cda4 100644
--- a/source/blender/compositor/operations/COM_PreviewOperation.h
+++ b/source/blender/compositor/operations/COM_PreviewOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_PREVIEWOPERATION_H__
-#define __COM_PREVIEWOPERATION_H__
+#pragma once
+
 #include "BKE_global.h"
 #include "BLI_rect.h"
 #include "COM_NodeOperation.h"
@@ -61,4 +61,3 @@ class PreviewOperation : public NodeOperation {
     return true;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ProjectorLensDistortionOperation.h b/source/blender/compositor/operations/COM_ProjectorLensDistortionOperation.h
index 3574f40e3bb..b9290fa1548 100644
--- a/source/blender/compositor/operations/COM_ProjectorLensDistortionOperation.h
+++ b/source/blender/compositor/operations/COM_ProjectorLensDistortionOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_PROJECTORLENSDISTORTIONOPERATION_H__
-#define __COM_PROJECTORLENSDISTORTIONOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
 
@@ -58,4 +58,3 @@ class ProjectorLensDistortionOperation : public NodeOperation {
 
   void updateDispersion();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_QualityStepHelper.h b/source/blender/compositor/operations/COM_QualityStepHelper.h
index 0814f5cdb4c..e437613fb29 100644
--- a/source/blender/compositor/operations/COM_QualityStepHelper.h
+++ b/source/blender/compositor/operations/COM_QualityStepHelper.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_QUALITYSTEPHELPER_H__
-#define __COM_QUALITYSTEPHELPER_H__
+#pragma once
+
 #include "COM_defines.h"
 
 typedef enum QualityHelper {
@@ -54,4 +54,3 @@ class QualityStepHelper {
     this->m_quality = quality;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ReadBufferOperation.h b/source/blender/compositor/operations/COM_ReadBufferOperation.h
index 60d064a5582..e59cb5449d6 100644
--- a/source/blender/compositor/operations/COM_ReadBufferOperation.h
+++ b/source/blender/compositor/operations/COM_ReadBufferOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_READBUFFEROPERATION_H__
-#define __COM_READBUFFEROPERATION_H__
+#pragma once
 
 #include "COM_MemoryBuffer.h"
 #include "COM_MemoryProxy.h"
@@ -73,5 +72,3 @@ class ReadBufferOperation : public NodeOperation {
   void readResolutionFromWriteBuffer();
   void updateMemoryBuffer();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_RenderLayersProg.h b/source/blender/compositor/operations/COM_RenderLayersProg.h
index 6f84eae3252..74664c128c0 100644
--- a/source/blender/compositor/operations/COM_RenderLayersProg.h
+++ b/source/blender/compositor/operations/COM_RenderLayersProg.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_RENDERLAYERSPROG_H__
-#define __COM_RENDERLAYERSPROG_H__
+#pragma once
 
 #include "BLI_listbase.h"
 #include "BLI_utildefines.h"
@@ -150,5 +149,3 @@ class RenderLayersDepthProg : public RenderLayersProg {
   }
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_RotateOperation.h b/source/blender/compositor/operations/COM_RotateOperation.h
index 46bdc68161e..0ef4466671a 100644
--- a/source/blender/compositor/operations/COM_RotateOperation.h
+++ b/source/blender/compositor/operations/COM_RotateOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ROTATEOPERATION_H__
-#define __COM_ROTATEOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -47,5 +46,3 @@ class RotateOperation : public NodeOperation {
 
   void ensureDegree();
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_ScaleOperation.h b/source/blender/compositor/operations/COM_ScaleOperation.h
index 28e32ff8606..f28b8237485 100644
--- a/source/blender/compositor/operations/COM_ScaleOperation.h
+++ b/source/blender/compositor/operations/COM_ScaleOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SCALEOPERATION_H__
-#define __COM_SCALEOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -129,5 +128,3 @@ class ScaleFixedSizeOperation : public BaseScaleOperation {
     this->m_offsetY = y;
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h b/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h
index c9db5bc88b8..f9982d94f60 100644
--- a/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h
+++ b/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SCREENLENSDISTORTIONOPERATION_H__
-#define __COM_SCREENLENSDISTORTIONOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
 
@@ -96,4 +96,3 @@ class ScreenLensDistortionOperation : public NodeOperation {
                   float sum[4],
                   int count[3]) const;
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SetAlphaOperation.h b/source/blender/compositor/operations/COM_SetAlphaOperation.h
index 24f80b71eae..a84fb0f2228 100644
--- a/source/blender/compositor/operations/COM_SetAlphaOperation.h
+++ b/source/blender/compositor/operations/COM_SetAlphaOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SETALPHAOPERATION_H__
-#define __COM_SETALPHAOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -43,4 +43,3 @@ class SetAlphaOperation : public NodeOperation {
   void initExecution();
   void deinitExecution();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SetColorOperation.h b/source/blender/compositor/operations/COM_SetColorOperation.h
index d16d3806864..0723ac8a8e4 100644
--- a/source/blender/compositor/operations/COM_SetColorOperation.h
+++ b/source/blender/compositor/operations/COM_SetColorOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SETCOLOROPERATION_H__
-#define __COM_SETCOLOROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -82,4 +82,3 @@ class SetColorOperation : public NodeOperation {
     return true;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SetSamplerOperation.h b/source/blender/compositor/operations/COM_SetSamplerOperation.h
index 62f01129ff7..c0b5d5a37be 100644
--- a/source/blender/compositor/operations/COM_SetSamplerOperation.h
+++ b/source/blender/compositor/operations/COM_SetSamplerOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SETSAMPLEROPERATION_H__
-#define __COM_SETSAMPLEROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -47,4 +47,3 @@ class SetSamplerOperation : public NodeOperation {
   void initExecution();
   void deinitExecution();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SetValueOperation.h b/source/blender/compositor/operations/COM_SetValueOperation.h
index 6fb2832450d..6645cd558b2 100644
--- a/source/blender/compositor/operations/COM_SetValueOperation.h
+++ b/source/blender/compositor/operations/COM_SetValueOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SETVALUEOPERATION_H__
-#define __COM_SETVALUEOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -54,4 +54,3 @@ class SetValueOperation : public NodeOperation {
     return true;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SetVectorOperation.h b/source/blender/compositor/operations/COM_SetVectorOperation.h
index a2f9aaa6b3b..05c8e6dc56b 100644
--- a/source/blender/compositor/operations/COM_SetVectorOperation.h
+++ b/source/blender/compositor/operations/COM_SetVectorOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SETVECTOROPERATION_H__
-#define __COM_SETVECTOROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 /**
@@ -88,4 +88,3 @@ class SetVectorOperation : public NodeOperation {
     setZ(vector[2]);
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SocketProxyOperation.h b/source/blender/compositor/operations/COM_SocketProxyOperation.h
index 3855c26088a..22c144598f6 100644
--- a/source/blender/compositor/operations/COM_SocketProxyOperation.h
+++ b/source/blender/compositor/operations/COM_SocketProxyOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SOCKETPROXYOPERATION_H__
-#define __COM_SOCKETPROXYOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -46,5 +45,3 @@ class SocketProxyOperation : public NodeOperation {
  private:
   bool m_use_conversion;
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_SplitOperation.h b/source/blender/compositor/operations/COM_SplitOperation.h
index ea923123290..62d41a615ff 100644
--- a/source/blender/compositor/operations/COM_SplitOperation.h
+++ b/source/blender/compositor/operations/COM_SplitOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_SPLITOPERATION_H__
-#define __COM_SPLITOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 
 class SplitOperation : public NodeOperation {
@@ -43,4 +43,3 @@ class SplitOperation : public NodeOperation {
     this->m_xSplit = xsplit;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_SunBeamsOperation.h b/source/blender/compositor/operations/COM_SunBeamsOperation.h
index d8153264d98..09bdb018cc3 100644
--- a/source/blender/compositor/operations/COM_SunBeamsOperation.h
+++ b/source/blender/compositor/operations/COM_SunBeamsOperation.h
@@ -15,8 +15,7 @@
  * Copyright 2014, Blender Foundation.
  */
 
-#ifndef __COM_SUNBEAMSOPERATION_H__
-#define __COM_SUNBEAMSOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -45,5 +44,3 @@ class SunBeamsOperation : public NodeOperation {
   float m_source_px[2];
   float m_ray_length_px;
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_TextureOperation.h b/source/blender/compositor/operations/COM_TextureOperation.h
index ebfdbb6513a..7fa85922b0b 100644
--- a/source/blender/compositor/operations/COM_TextureOperation.h
+++ b/source/blender/compositor/operations/COM_TextureOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_TEXTUREOPERATION_H__
-#define __COM_TEXTUREOPERATION_H__
+#pragma once
 
 #include "BLI_listbase.h"
 #include "COM_NodeOperation.h"
@@ -81,5 +80,3 @@ class TextureAlphaOperation : public TextureBaseOperation {
   TextureAlphaOperation();
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_TonemapOperation.h b/source/blender/compositor/operations/COM_TonemapOperation.h
index 11e82c1fc9c..066332fb7e4 100644
--- a/source/blender/compositor/operations/COM_TonemapOperation.h
+++ b/source/blender/compositor/operations/COM_TonemapOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_TONEMAPOPERATION_H__
-#define __COM_TONEMAPOPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "DNA_node_types.h"
 
@@ -98,5 +98,3 @@ class PhotoreceptorTonemapOperation : public TonemapOperation {
    */
   void executePixel(float output[4], int x, int y, void *data);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_TrackPositionOperation.h b/source/blender/compositor/operations/COM_TrackPositionOperation.h
index 695e85f4fa3..7d831ec5d8d 100644
--- a/source/blender/compositor/operations/COM_TrackPositionOperation.h
+++ b/source/blender/compositor/operations/COM_TrackPositionOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2012, Blender Foundation.
  */
 
-#ifndef __COM_TRACKPOSITIONOPERATION_H__
-#define __COM_TRACKPOSITIONOPERATION_H__
+#pragma once
 
 #include <string.h>
 
@@ -97,5 +96,3 @@ class TrackPositionOperation : public NodeOperation {
     return true;
   }
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_TranslateOperation.h b/source/blender/compositor/operations/COM_TranslateOperation.h
index 2d13813a86a..99cfb528858 100644
--- a/source/blender/compositor/operations/COM_TranslateOperation.h
+++ b/source/blender/compositor/operations/COM_TranslateOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_TRANSLATEOPERATION_H__
-#define __COM_TRANSLATEOPERATION_H__
+#pragma once
 
 #include "COM_NodeOperation.h"
 
@@ -65,5 +64,3 @@ class TranslateOperation : public NodeOperation {
 
   void setFactorXY(float factorX, float factorY);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_VariableSizeBokehBlurOperation.h b/source/blender/compositor/operations/COM_VariableSizeBokehBlurOperation.h
index 930bfd77943..82f41ad68e3 100644
--- a/source/blender/compositor/operations/COM_VariableSizeBokehBlurOperation.h
+++ b/source/blender/compositor/operations/COM_VariableSizeBokehBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_VARIABLESIZEBOKEHBLUROPERATION_H__
-#define __COM_VARIABLESIZEBOKEHBLUROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
 
@@ -123,4 +123,3 @@ class InverseSearchRadiusOperation : public NodeOperation {
   }
 };
 #endif
-#endif
diff --git a/source/blender/compositor/operations/COM_VectorBlurOperation.h b/source/blender/compositor/operations/COM_VectorBlurOperation.h
index 3caf5c5c8e4..846b69310bf 100644
--- a/source/blender/compositor/operations/COM_VectorBlurOperation.h
+++ b/source/blender/compositor/operations/COM_VectorBlurOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_VECTORBLUROPERATION_H__
-#define __COM_VECTORBLUROPERATION_H__
+#pragma once
+
 #include "COM_NodeOperation.h"
 #include "COM_QualityStepHelper.h"
 #include "DNA_node_types.h"
@@ -72,4 +72,3 @@ class VectorBlurOperation : public NodeOperation, public QualityStepHelper {
                           MemoryBuffer *inputSpeed,
                           MemoryBuffer *inputZ);
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_VectorCurveOperation.h b/source/blender/compositor/operations/COM_VectorCurveOperation.h
index 65441dbdfb7..9fa5fe78a4b 100644
--- a/source/blender/compositor/operations/COM_VectorCurveOperation.h
+++ b/source/blender/compositor/operations/COM_VectorCurveOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_VECTORCURVEOPERATION_H__
-#define __COM_VECTORCURVEOPERATION_H__
+#pragma once
+
 #include "COM_CurveBaseOperation.h"
 #include "COM_NodeOperation.h"
 
@@ -46,4 +46,3 @@ class VectorCurveOperation : public CurveBaseOperation {
    */
   void deinitExecution();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ViewerOperation.h b/source/blender/compositor/operations/COM_ViewerOperation.h
index aae2e912804..680744c70d9 100644
--- a/source/blender/compositor/operations/COM_ViewerOperation.h
+++ b/source/blender/compositor/operations/COM_ViewerOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_VIEWEROPERATION_H__
-#define __COM_VIEWEROPERATION_H__
+#pragma once
+
 #include "BKE_global.h"
 #include "BLI_rect.h"
 #include "COM_NodeOperation.h"
@@ -129,4 +129,3 @@ class ViewerOperation : public NodeOperation {
   void updateImage(rcti *rect);
   void initImage();
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_WrapOperation.h b/source/blender/compositor/operations/COM_WrapOperation.h
index 6360fa0c246..d1acfb10f25 100644
--- a/source/blender/compositor/operations/COM_WrapOperation.h
+++ b/source/blender/compositor/operations/COM_WrapOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_WRAPOPERATION_H__
-#define __COM_WRAPOPERATION_H__
+#pragma once
 
 #include "COM_ReadBufferOperation.h"
 
@@ -38,5 +37,3 @@ class WrapOperation : public ReadBufferOperation {
 
   void setFactorXY(float factorX, float factorY);
 };
-
-#endif
diff --git a/source/blender/compositor/operations/COM_WriteBufferOperation.h b/source/blender/compositor/operations/COM_WriteBufferOperation.h
index be525db4420..a9f90830a92 100644
--- a/source/blender/compositor/operations/COM_WriteBufferOperation.h
+++ b/source/blender/compositor/operations/COM_WriteBufferOperation.h
@@ -16,8 +16,7 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_WRITEBUFFEROPERATION_H__
-#define __COM_WRITEBUFFEROPERATION_H__
+#pragma once
 
 #include "COM_MemoryProxy.h"
 #include "COM_NodeOperation.h"
@@ -63,4 +62,3 @@ class WriteBufferOperation : public NodeOperation {
     return m_input;
   }
 };
-#endif
diff --git a/source/blender/compositor/operations/COM_ZCombineOperation.h b/source/blender/compositor/operations/COM_ZCombineOperation.h
index 9a93d080a2f..8c6e73f8c55 100644
--- a/source/blender/compositor/operations/COM_ZCombineOperation.h
+++ b/source/blender/compositor/operations/COM_ZCombineOperation.h
@@ -16,8 +16,8 @@
  * Copyright 2011, Blender Foundation.
  */
 
-#ifndef __COM_ZCOMBINEOPERATION_H__
-#define __COM_ZCOMBINEOPERATION_H__
+#pragma once
+
 #include "COM_MixOperation.h"
 
 /**
@@ -66,5 +66,3 @@ class ZCombineMaskOperation : public NodeOperation {
 class ZCombineMaskAlphaOperation : public ZCombineMaskOperation {
   void executePixelSampled(float output[4], float x, float y, PixelSampler sampler);
 };
-
-#endif