Differential D11791 Diff 40163 source/blender/compositor/operations/COM_BrightnessOperation.cc

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source/blender/compositor/operations/COM_BrightnessOperation.cc

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BrightnessOperation::BrightnessOperation()		BrightnessOperation::BrightnessOperation()
{		{
this->addInputSocket(DataType::Color);		this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);		this->addInputSocket(DataType::Value);
this->addInputSocket(DataType::Value);		this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);		this->addOutputSocket(DataType::Color);
this->m_inputProgram = nullptr;		this->m_inputProgram = nullptr;
this->m_use_premultiply = false;		this->m_use_premultiply = false;
		flags.can_be_constant = true;
}		}

void BrightnessOperation::setUsePremultiply(bool use_premultiply)		void BrightnessOperation::setUsePremultiply(bool use_premultiply)
{		{
this->m_use_premultiply = use_premultiply;		this->m_use_premultiply = use_premultiply;
}		}

void BrightnessOperation::initExecution()		void BrightnessOperation::initExecution()
▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines	void BrightnessOperation::executePixelSampled(float output[4],
output[1] = a * inputValue[1] + b;		output[1] = a * inputValue[1] + b;
output[2] = a * inputValue[2] + b;		output[2] = a * inputValue[2] + b;
output[3] = inputValue[3];		output[3] = inputValue[3];
if (this->m_use_premultiply) {		if (this->m_use_premultiply) {
straight_to_premul_v4(output);		straight_to_premul_v4(output);
}		}
}		}

		void BrightnessOperation::update_memory_buffer_partial(MemoryBuffer *output,
		const rcti &area,
		Span<MemoryBuffer *> inputs)
		{
		float tmp_color[4];
		for (BuffersIterator<float> it = output->iterate_with(inputs, area); !it.is_end(); ++it) {
		const float *in_color = it.in(0);
		const float brightness = *it.in(1) / 100.0f;
		const float contrast = *it.in(2);
		float delta = contrast / 200.0f;
		/*
		* The algorithm is by Werner D. Streidt
		* (http://visca.com/ffactory/archives/5-99/msg00021.html)
		* Extracted of OpenCV demhist.c
		*/
		float a, b;
		if (contrast > 0) {
		a = 1.0f - delta * 2.0f;
		a = 1.0f / max_ff(a, FLT_EPSILON);
		b = a * (brightness - delta);
		}
		else {
		delta *= -1;
		a = max_ff(1.0f - delta * 2.0f, 0.0f);
		b = a * brightness + delta;
		}
		const float *color;
		if (this->m_use_premultiply) {
		premul_to_straight_v4_v4(tmp_color, in_color);
		color = tmp_color;
		}
		else {
		color = in_color;
		}
		it.out[0] = a * color[0] + b;
		it.out[1] = a * color[1] + b;
		it.out[2] = a * color[2] + b;
		it.out[3] = color[3];
		if (this->m_use_premultiply) {
		straight_to_premul_v4(it.out);
		}
		}
		}

void BrightnessOperation::deinitExecution()		void BrightnessOperation::deinitExecution()
{		{
this->m_inputProgram = nullptr;		this->m_inputProgram = nullptr;
this->m_inputBrightnessProgram = nullptr;		this->m_inputBrightnessProgram = nullptr;
this->m_inputContrastProgram = nullptr;		this->m_inputContrastProgram = nullptr;
}		}

} // namespace blender::compositor		} // namespace blender::compositor