osg::Image* doColourSpaceConversion(ColourSpaceOperation op, osg::Image* image, osg::Vec4& colour)
{
switch(op)
{
case (MODULATE_ALPHA_BY_LUMINANCE):
{
std::cout<<"doing conversion MODULATE_ALPHA_BY_LUMINANCE"<<std::endl;
osg::modifyImage(image,ModulateAlphaByLuminanceOperator());
return image;
}
case (MODULATE_ALPHA_BY_COLOUR):
{
std::cout<<"doing conversion MODULATE_ALPHA_BY_COLOUR"<<std::endl;
osg::modifyImage(image,ModulateAlphaByColourOperator(colour));
return image;
}
case (REPLACE_ALPHA_WITH_LUMINANCE):
{
std::cout<<"doing conversion REPLACE_ALPHA_WITH_LUMINANCE"<<std::endl;
osg::modifyImage(image,ReplaceAlphaWithLuminanceOperator());
return image;
}
case (REPLACE_RGB_WITH_LUMINANCE):
{
std::cout<<"doing conversion REPLACE_ALPHA_WITH_LUMINANCE"<<std::endl;
osg::Image* newImage = new osg::Image;
newImage->allocateImage(image->s(), image->t(), image->r(), GL_LUMINANCE, image->getDataType());
osg::copyImage(image, 0, 0, 0, image->s(), image->t(), image->r(),
newImage, 0, 0, 0, false);
return newImage;
}
default:
return image;
}
}
osg::Image* colorSpaceConversion(ColorSpaceOperation op, osg::Image* image, const osg::Vec4& colour)
{
GLenum requiredPixelFormat = image->getPixelFormat();
switch(op)
{
case (MODULATE_ALPHA_BY_LUMINANCE):
case (MODULATE_ALPHA_BY_COLOR):
case (REPLACE_ALPHA_WITH_LUMINANCE):
if (image->getPixelFormat()==GL_RGB || image->getPixelFormat()==GL_BGR) requiredPixelFormat = GL_RGBA;
break;
case (REPLACE_RGB_WITH_LUMINANCE):
if (image->getPixelFormat()==GL_RGB || image->getPixelFormat()==GL_BGR) requiredPixelFormat = GL_LUMINANCE;
break;
default:
break;
}
if (requiredPixelFormat!=image->getPixelFormat())
{
osg::Image* newImage = new osg::Image;
newImage->allocateImage(image->s(), image->t(), image->r(), requiredPixelFormat, image->getDataType());
osg::copyImage(image, 0, 0, 0, image->s(), image->t(), image->r(),
newImage, 0, 0, 0, false);
image = newImage;
}
switch(op)
{
case (MODULATE_ALPHA_BY_LUMINANCE):
{
OSG_NOTICE<<"doing conversion MODULATE_ALPHA_BY_LUMINANCE"<<std::endl;
osg::modifyImage(image, ModulateAlphaByLuminanceOperator());
return image;
}
case (MODULATE_ALPHA_BY_COLOR):
{
OSG_NOTICE<<"doing conversion MODULATE_ALPHA_BY_COLOUR"<<std::endl;
osg::modifyImage(image, ModulateAlphaByColorOperator(colour));
return image;
}
case (REPLACE_ALPHA_WITH_LUMINANCE):
{
OSG_NOTICE<<"doing conversion REPLACE_ALPHA_WITH_LUMINANCE"<<std::endl;
osg::modifyImage(image, ReplaceAlphaWithLuminanceOperator());
return image;
}
case (REPLACE_RGB_WITH_LUMINANCE):
{
OSG_NOTICE<<"doing conversion REPLACE_RGB_WITH_LUMINANCE"<<std::endl;
// no work here required to be done as it'll already be done by copyImage above.
return image;
}
default:
return image;
}
}
