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use crate::program::Version;
use crate::triangle::{simple_triangle_program, update_transform};
use crate::Color;
use glow::{Context, HasContext, NativeProgram};
use iced_graphics::Transformation;
#[derive(Debug)]
pub struct SolidProgram {
pub(crate) program: <Context as HasContext>::Program,
pub(crate) uniform_data: SolidUniformData,
}
impl SolidProgram {
pub fn new(gl: &Context, shader_version: &Version) -> Self {
let program = simple_triangle_program(
gl,
shader_version,
include_str!("../shader/common/triangle.frag"),
);
Self {
program,
uniform_data: SolidUniformData::new(gl, program),
}
}
pub fn set_uniforms<'a>(
&mut self,
gl: &Context,
color: &Color,
transform: Option<Transformation>,
) {
update_transform(gl, self.program, transform);
if &self.uniform_data.color != color {
unsafe {
gl.uniform_4_f32(
Some(&self.uniform_data.color_location),
color.r,
color.g,
color.b,
color.a,
);
}
self.uniform_data.color = *color;
}
}
}
#[derive(Debug)]
pub(crate) struct SolidUniformData {
pub color: Color,
pub color_location: <Context as HasContext>::UniformLocation,
}
impl SolidUniformData {
fn new(gl: &Context, program: NativeProgram) -> Self {
Self {
color: Color::TRANSPARENT,
color_location: unsafe {
gl.get_uniform_location(program, "color")
}
.expect("Solid - Color uniform location."),
}
}
}
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