use super::*;
pub struct Sprite<'r, S> {
pub pos: Vec2,
pub size: Vec2,
pub color: Color,
pub tex: &'r VTex2d<S, u8>,
}
impl<S: TexSize> Sprite<'_, S> {
pub fn compare(&self, crop: &Geom, r: &SpriteImpl<S>) -> State {
let Self { pos, size, color, tex: tex_new } = *self;
let xyzw = (State::XYZW | State::UV).or_def(geom_cmp(pos, size, crop, &r.base));
let rgba = State::RGBA.or_def(color != r.base.color);
let ord = State::MISMATCH.or_def(!ptr::eq(r.tex, tex_new) || (!rgba.is_empty() && ordering_cmp::<S, _>(color, r)));
ord | xyzw | rgba
}
pub fn obj(self, crop: Geom) -> SpriteImpl<S> {
let Self { pos, size, color, tex } = self;
SpriteImpl { base: Base { pos, size, crop, color }, tex }
}
}
pub struct SpriteImpl<S> {
base: Base,
tex: *const VTex2d<S, u8>,
}
impl<S: TexSize> SpriteImpl<S> {
pub fn batchable(&self, r: &Self) -> bool {
self.ordered() == r.ordered() && atlas_cmp(self.tex, r.tex)
}
}
impl<S: TexSize> Primitive for SpriteImpl<S> {
fn base(&self) -> &Base {
&self.base
}
fn write_mesh(&self, aspect: Vec2, BatchedObj { z, state, xyzw, rgba, uv }: BatchedObj) {
if state.contains(State::XYZW | State::UV) {
let ((x1, y1), (x2, y2), (u1, v1, u2, v2)) = <_>::to({
let (crop @ (p1, p2), &Base { pos, size, .. }) = (self.base.bound_box(), self.base());
let (xy1, xy2, uv) = (pos, pos.sum(size), unsafe { &*self.tex }.region);
let uv = bound_uv(crop, (xy1, xy2), uv);
(p1.mul(aspect), p2.mul(aspect), uv)
});
let O = f16::ZERO;
if state.contains(State::XYZW) {
xyzw[..16].copy_from_slice(&[x1, y1, z, O, x2, y1, z, O, x2, y2, z, O, x1, y2, z, O]);
}
if state.contains(State::UV) {
uv[..8].copy_from_slice(&[u1, v1, u2, v1, u2, v2, u1, v2]);
}
}
if state.contains(State::RGBA) {
let (r, g, b, a) = vec4(self.base.color.mul(255).clmp(0, 255).round());
rgba[..16].copy_from_slice(&[r, g, b, a, r, g, b, a, r, g, b, a, r, g, b, a]);
}
}
fn batch_draw(&self, b: &VaoBind<u16>, (offset, num): (u16, u16)) {
let s = LeakyStatic!(Shader, { [vs_gui__pos_col_tex, ps_gui__col_tex].pipe(Shader::pure) });
let t = unsafe { &*self.tex }.atlas.Bind(sampler());
let _ = Uniforms!(s, ("iTex", t));
b.Draw((num, offset, gl::TRIANGLES));
}
fn ordered(&self) -> bool {
S::TYPE == gl::RGBA || Primitive::ordered(self)
}
}
pub fn sampler() -> &'static Sampler {
LeakyStatic!(Sampler, { Sampler::linear() })
}
SHADER!(
vs_gui__pos_col_tex,
r"layout(location = 0) in vec4 Position;
layout(location = 1) in vec4 Color;
layout(location = 2) in vec2 TexCoord;
out vec4 glColor;
out vec2 glUV;
void main() {
gl_Position = vec4(Position.xyz, 1);
glColor = Color;
glUV = TexCoord;
}"
);
SHADER!(
ps_gui__col_tex,
r"in vec4 glColor;
in vec2 glUV;
layout(location = 0) out vec4 glFragColor;
uniform sampler2D iTex;
void main() { glFragColor = glColor * texture(iTex, glUV); }"
);