light/modules/renderer/private/gl/blender.cpp

#include <glad/gl.h>
#include <renderer/gl/blender.hpp>

namespace lt {

glBlender::glBlender()
    : m_factor_map { // constants
	                 { BlendFactor::ZERO, GL_ZERO },
	                 { BlendFactor::ONE, GL_ONE },

	                 // source						 ,
	                 { BlendFactor::SRC_COLOR, GL_SRC_COLOR },
	                 { BlendFactor::INVERSE_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR },

	                 { BlendFactor::SRC_ALPHA, GL_SRC_ALPHA },
	                 { BlendFactor::INVERSE_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA },

	                 // destination					 ,
	                 { BlendFactor::DST_COLOR, GL_DST_COLOR },
	                 { BlendFactor::INVERSE_DST_COLOR, GL_ONE_MINUS_DST_COLOR },

	                 { BlendFactor::DST_ALPHA, GL_DST_ALPHA },
	                 { BlendFactor::INVERSE_DST_ALPHA, GL_ONE_MINUS_DST_ALPHA },

	                 // source1						 ,
	                 { BlendFactor::SRC1_COLOR, GL_SRC1_COLOR },
	                 { BlendFactor::INVERSE_SRC1_COLOR, GL_ONE_MINUS_SRC1_COLOR },

	                 { BlendFactor::SRC1_ALPHA, GL_SRC1_ALPHA },
	                 { BlendFactor::INVERSE_SRC1_ALPHA, GL_ONE_MINUS_SRC_ALPHA }
    }
{
}

void glBlender::enable(BlendFactor srcFactor, BlendFactor dstFactor)
{
	glEnable(GL_BLEND);
	glBlendFunc(m_factor_map.at(srcFactor), m_factor_map.at(dstFactor));
}

void glBlender::disable()
{
	glDisable(GL_BLEND);
}

} // namespace lt