Differential D2982 Diff 9751 source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp

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source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp

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	*			*
	* Contributor:			* Contributor:
	* Dalai Felinto			* Dalai Felinto
	*/			*/

	#include "COM_LuminanceMatteOperation.h"			#include "COM_LuminanceMatteOperation.h"
	#include "BLI_math.h"			#include "BLI_math.h"

				extern "C" {
				#include "IMB_colormanagement.h"
				}

	LuminanceMatteOperation::LuminanceMatteOperation() : NodeOperation()			LuminanceMatteOperation::LuminanceMatteOperation() : NodeOperation()
	{			{
	addInputSocket(COM_DT_COLOR);			addInputSocket(COM_DT_COLOR);
	addOutputSocket(COM_DT_VALUE);			addOutputSocket(COM_DT_VALUE);

	this->m_inputImageProgram = NULL;			this->m_inputImageProgram = NULL;
	}			}

	void LuminanceMatteOperation::initExecution()			void LuminanceMatteOperation::initExecution()
	{			{
	this->m_inputImageProgram = this->getInputSocketReader(0);			this->m_inputImageProgram = this->getInputSocketReader(0);
	}			}

	void LuminanceMatteOperation::deinitExecution()			void LuminanceMatteOperation::deinitExecution()
	{			{
	this->m_inputImageProgram = NULL;			this->m_inputImageProgram = NULL;
	}			}

	void LuminanceMatteOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)			void LuminanceMatteOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
	{			{
	float inColor[4];			float inColor[4];
				this->m_inputImageProgram->readSampled(inColor, x, y, sampler);

	const float high = this->m_settings->t1;			const float high = this->m_settings->t1;
	const float low = this->m_settings->t2;			const float low = this->m_settings->t2;
				const float luminance = IMB_colormanagement_get_luminance(inColor);

	float alpha;			float alpha;

	this->m_inputImageProgram->readSampled(inColor, x, y, sampler);

	/* one line thread-friend algorithm:			/* one line thread-friend algorithm:
	* output[0] = max(inputValue[3], min(high, max(low, ((inColor[0] - low) / (high - low))));			* output[0] = min(inputValue[3], min(1.0f, max(0.0f, ((luminance - low) / (high - low))));
	*/			*/

	/* test range */			/* test range */
	if (inColor[0] > high) {			if (luminance > high) {
	alpha = 1.0f;			alpha = 1.0f;
	}			}
	else if (inColor[0] < low) {			else if (luminance < low) {
	alpha = 0.0f;			alpha = 0.0f;
	}			}
	else { /blend /			else { /blend /
	alpha = (inColor[0] - low) / (high - low);			alpha = (luminance - low) / (high - low);
	}			}


	/* store matte(alpha) value in [0] to go with			/* store matte(alpha) value in [0] to go with
	* COM_SetAlphaOperation and the Value output			* COM_SetAlphaOperation and the Value output
	*/			*/

	/* don't make something that was more transparent less transparent */			/* don't make something that was more transparent less transparent */
	if (alpha < inColor[3]) {			output[0] = min_ff(alpha, inColor[3]);
	output[0] = alpha;
	}
	else {
	/* leave now it was before */
	output[0] = inColor[3];
	}
	}			}