2022-11-30 15:56:10 +11:00
|
|
|
use librashader_common::Size;
|
|
|
|
use librashader_presets::{Scale2D, ScaleFactor, ScaleType, Scaling};
|
|
|
|
use num_traits::AsPrimitive;
|
2022-11-30 17:38:05 +11:00
|
|
|
use std::ops::Mul;
|
2022-11-30 15:56:10 +11:00
|
|
|
|
|
|
|
pub fn scale<T>(scaling: Scale2D, source: Size<T>, viewport: Size<T>) -> Size<T>
|
2022-11-30 17:38:05 +11:00
|
|
|
where
|
|
|
|
T: Mul<ScaleFactor, Output = f32> + Copy + 'static,
|
|
|
|
f32: AsPrimitive<T>,
|
2022-11-30 15:56:10 +11:00
|
|
|
{
|
|
|
|
let width: f32;
|
|
|
|
let height: f32;
|
|
|
|
|
|
|
|
match scaling.x {
|
|
|
|
Scaling {
|
|
|
|
scale_type: ScaleType::Input,
|
|
|
|
factor,
|
|
|
|
} => width = source.width * factor,
|
|
|
|
Scaling {
|
|
|
|
scale_type: ScaleType::Absolute,
|
|
|
|
factor,
|
|
|
|
} => width = factor.into(),
|
|
|
|
Scaling {
|
|
|
|
scale_type: ScaleType::Viewport,
|
|
|
|
factor,
|
|
|
|
} => width = viewport.width * factor,
|
|
|
|
};
|
|
|
|
|
|
|
|
match scaling.y {
|
|
|
|
Scaling {
|
|
|
|
scale_type: ScaleType::Input,
|
|
|
|
factor,
|
|
|
|
} => height = source.height * factor,
|
|
|
|
Scaling {
|
|
|
|
scale_type: ScaleType::Absolute,
|
|
|
|
factor,
|
|
|
|
} => height = factor.into(),
|
|
|
|
Scaling {
|
|
|
|
scale_type: ScaleType::Viewport,
|
|
|
|
factor,
|
|
|
|
} => height = viewport.height * factor,
|
|
|
|
};
|
|
|
|
|
|
|
|
Size {
|
|
|
|
width: width.round().as_(),
|
|
|
|
height: height.round().as_(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn calc_miplevel(size: Size<u32>) -> u32 {
|
|
|
|
let mut size = std::cmp::max(size.width, size.height);
|
|
|
|
let mut levels = 0;
|
|
|
|
while size != 0 {
|
|
|
|
levels += 1;
|
|
|
|
size >>= 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
levels
|
2022-11-30 17:38:05 +11:00
|
|
|
}
|