Differential D16990 Diff 60050 source/blender/compositor/realtime_compositor/shaders/compositor_parallel_reduction.glsl

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source/blender/compositor/realtime_compositor/shaders/compositor_parallel_reduction.glsl

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	* TYPE, IDENTITY, INITIALIZE, LOAD, and REDUCE. See the implementation below for more information			* TYPE, IDENTITY, INITIALIZE, LOAD, and REDUCE. See the implementation below for more information
	* as well as the compositor_parallel_reduction_info.hh for example reductions operations. */			* as well as the compositor_parallel_reduction_info.hh for example reductions operations. */

	/* Doing the reduction in shared memory is faster, so create a shared array where the whole data			/* Doing the reduction in shared memory is faster, so create a shared array where the whole data
	* of the work group will be loaded and reduced. The 2D structure of the work group is irrelevant			* of the work group will be loaded and reduced. The 2D structure of the work group is irrelevant
	* for reduction, so we just load the data in a 1D array to simplify reduction. The developer is			* for reduction, so we just load the data in a 1D array to simplify reduction. The developer is
	* expected to define the TYPE macro to be a float or a vec4, depending on the type of data being			* expected to define the TYPE macro to be a float or a vec4, depending on the type of data being
	* reduced. */			* reduced. */
	const uint reduction_size = gl_WorkGroupSize.x * gl_WorkGroupSize.y;			#define reduction_size (gl_WorkGroupSize.x * gl_WorkGroupSize.y)
	shared TYPE reduction_data[reduction_size];			shared TYPE reduction_data[reduction_size];

	void main()			void main()
	{			{
	/* Load the data from the texture, while returning IDENTITY for out of bound coordinates. The			/* Load the data from the texture, while returning IDENTITY for out of bound coordinates. The
	* developer is expected to define the IDENTITY macro to be a vec4 that does not affect the			* developer is expected to define the IDENTITY macro to be a vec4 that does not affect the
	* output of the reduction. For instance, sum reductions have an identity of vec4(0.0), while			* output of the reduction. For instance, sum reductions have an identity of vec4(0.0), while
	* max value reductions have an identity of vec4(FLT_MIN). */			* max value reductions have an identity of vec4(FLT_MIN). */
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