Compositor: Add option to extend image bounds when blurring

It is handy when doing some roto work and it's required to blur some
mask or overaly before alpha-overing it on top of the footage.

Quite straightforward option with the only limitation that variable
size blur is not supported.

Reviewers: campbellbarton

Subscribers: hype, sebastian_k

Differential Revision: https://developer.blender.org/D1663

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/compositor/operations/COM_BokehBlurOperation.h b/source/blender/compositor/operations/COM_BokehBlurOperation.h
index d2944825583..ed967d0fdb9 100644
--- a/source/blender/compositor/operations/COM_BokehBlurOperation.h
+++ b/source/blender/compositor/operations/COM_BokehBlurOperation.h
@@ -37,6 +37,7 @@ private:
 	float m_bokehMidX;
 	float m_bokehMidY;
 	float m_bokehDimension;
+	bool m_extend_bounds;
 public:
 	BokehBlurOperation();
 
@@ -64,5 +65,10 @@ public:
 	                   MemoryBuffer *outputMemoryBuffer, cl_mem clOutputBuffer,
 	                   MemoryBuffer **inputMemoryBuffers, list<cl_mem> *clMemToCleanUp,
 	                   list<cl_kernel> *clKernelsToCleanUp);
+
+	void setExtendBounds(bool extend_bounds) { this->m_extend_bounds = extend_bounds; }
+
+	void determineResolution(unsigned int resolution[2],
+	                         unsigned int preferredResolution[2]);
 };
 #endif