spitfire_gui/renderer.rs
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use fontdue::layout::{HorizontalAlign, VerticalAlign};
use raui_core::prelude::*;
use spitfire_draw::prelude::*;
use spitfire_glow::prelude::*;
use vek::{Rgba, Vec2};
pub struct GuiRenderer<'a> {
pub texture_filtering: GlowTextureFiltering,
pub draw: &'a mut DrawContext,
pub graphics: &'a mut Graphics<Vertex>,
pub colored_shader: &'a ShaderRef,
pub textured_shader: &'a ShaderRef,
pub text_shader: &'a ShaderRef,
}
impl<'a> GuiRenderer<'a> {
fn draw_node(&mut self, node: &WidgetUnit, mapping: &CoordsMapping, layout: &Layout) {
match node {
WidgetUnit::None | WidgetUnit::PortalBox(_) => {}
WidgetUnit::AreaBox(node) => {
self.draw_node(&node.slot, mapping, layout);
}
WidgetUnit::ContentBox(node) => {
for item in &node.items {
self.draw_node(&item.slot, mapping, layout);
}
}
WidgetUnit::FlexBox(node) => {
for item in &node.items {
self.draw_node(&item.slot, mapping, layout);
}
}
WidgetUnit::GridBox(node) => {
for item in &node.items {
self.draw_node(&item.slot, mapping, layout);
}
}
WidgetUnit::SizeBox(node) => {
self.draw_node(&node.slot, mapping, layout);
}
WidgetUnit::ImageBox(node) => {
if let Some(layout) = layout.items.get(&node.id) {
let rect = mapping.virtual_to_real_rect(layout.ui_space, false);
match &node.material {
ImageBoxMaterial::Color(color) => {
let tint = Rgba {
r: color.color.r,
g: color.color.g,
b: color.color.b,
a: color.color.a,
};
let mut size = Vec2::new(rect.width(), rect.height());
let mut position = Vec2::new(rect.left, rect.top);
match &color.scaling {
ImageBoxImageScaling::Stretch => {
Sprite::default()
.shader(self.colored_shader.clone())
.tint(tint)
.size(size)
.position(position)
.blending(GlowBlending::Alpha)
.screen_space(true)
.draw(self.draw, self.graphics);
}
ImageBoxImageScaling::Frame(frame) => {
position += size * 0.5;
if frame.frame_keep_aspect_ratio {
let source_aspect =
frame.source.width() / frame.source.height();
let size_aspect = size.x / size.y;
if source_aspect >= size_aspect {
size.y /= source_aspect;
} else {
size.x *= source_aspect;
}
}
NineSliceSprite::default()
.shader(self.colored_shader.clone())
.tint(tint)
.size(size)
.position(position)
.pivot(0.5.into())
.blending(GlowBlending::Alpha)
.margins_source(NineSliceMargins {
left: frame.source.left,
right: frame.source.right,
top: frame.source.top,
bottom: frame.source.bottom,
})
.margins_target(NineSliceMargins {
left: frame.destination.left,
right: frame.destination.right,
top: frame.destination.top,
bottom: frame.destination.bottom,
})
.frame_only(frame.frame_only)
.screen_space(true)
.draw(self.draw, self.graphics);
}
}
}
ImageBoxMaterial::Image(image) => {
let texture = TextureRef::name(image.id.to_owned());
let rect = if let Some(aspect) = node.content_keep_aspect_ratio {
let size = self
.draw
.texture(Some(&texture))
.map(|texture| {
Vec2::new(texture.width() as f32, texture.height() as f32)
})
.unwrap_or(Vec2::one());
let ox = rect.left;
let oy = rect.top;
let iw = rect.width();
let ih = rect.height();
let ra = size.x / size.y;
let ia = iw / ih;
let scale = if (ra >= ia) != aspect.outside {
iw / size.x
} else {
ih / size.y
};
let w = size.x * scale;
let h = size.y * scale;
let ow = lerp(0.0, iw - w, aspect.horizontal_alignment);
let oh = lerp(0.0, ih - h, aspect.vertical_alignment);
Rect {
left: ox + ow,
right: ox + ow + w,
top: oy + oh,
bottom: oy + oh + h,
}
} else {
rect
};
let tint = Rgba {
r: image.tint.r,
g: image.tint.g,
b: image.tint.b,
a: image.tint.a,
};
let mut size = Vec2::new(rect.width(), rect.height());
let mut position = Vec2::new(rect.left, rect.top);
match &image.scaling {
ImageBoxImageScaling::Stretch => {
Sprite::single(SpriteTexture {
sampler: "u_image".into(),
texture,
filtering: self.texture_filtering,
})
.shader(self.textured_shader.clone())
.region_page(
image
.source_rect
.map(|rect| vek::Rect {
x: rect.left,
y: rect.top,
w: rect.width(),
h: rect.height(),
})
.unwrap_or_else(|| vek::Rect {
x: 0.0,
y: 0.0,
w: 1.0,
h: 1.0,
}),
0.0,
)
.tint(tint)
.size(size)
.position(position)
.blending(GlowBlending::Alpha)
.screen_space(true)
.draw(self.draw, self.graphics);
}
ImageBoxImageScaling::Frame(frame) => {
position += size * 0.5;
if frame.frame_keep_aspect_ratio {
let source_aspect =
frame.source.width() / frame.source.height();
let size_aspect = size.x / size.y;
if source_aspect >= size_aspect {
size.y /= source_aspect;
} else {
size.x *= source_aspect;
}
}
NineSliceSprite::single(SpriteTexture {
sampler: "u_image".into(),
texture: TextureRef::name(image.id.to_owned()),
filtering: self.texture_filtering,
})
.shader(self.textured_shader.clone())
.tint(tint)
.size(size)
.position(position)
.pivot(0.5.into())
.blending(GlowBlending::Alpha)
.margins_source(NineSliceMargins {
left: frame.source.left,
right: frame.source.right,
top: frame.source.top,
bottom: frame.source.bottom,
})
.margins_target(NineSliceMargins {
left: frame.destination.left,
right: frame.destination.right,
top: frame.destination.top,
bottom: frame.destination.bottom,
})
.frame_only(frame.frame_only)
.screen_space(true)
.draw(self.draw, self.graphics);
}
}
}
ImageBoxMaterial::Procedural(_) => {
unimplemented!(
"Procedural images are not yet implemented in this version!"
);
}
}
}
}
WidgetUnit::TextBox(node) => {
if let Some(layout) = layout.items.get(node.id()) {
let rect = mapping.virtual_to_real_rect(layout.ui_space, false);
Text::default()
.shader(self.text_shader.clone())
.font(node.font.name.to_owned())
.size(node.font.size * mapping.scalar_scale(false))
.text(node.text.to_owned())
.tint(Rgba {
r: node.color.r,
g: node.color.g,
b: node.color.b,
a: node.color.a,
})
.horizontal_align(match node.horizontal_align {
TextBoxHorizontalAlign::Left => HorizontalAlign::Left,
TextBoxHorizontalAlign::Center => HorizontalAlign::Center,
TextBoxHorizontalAlign::Right => HorizontalAlign::Right,
})
.vertical_align(match node.vertical_align {
TextBoxVerticalAlign::Top => VerticalAlign::Top,
TextBoxVerticalAlign::Middle => VerticalAlign::Middle,
TextBoxVerticalAlign::Bottom => VerticalAlign::Bottom,
})
.position(Vec2::new(rect.left, rect.top))
.width(rect.width())
.height(rect.height())
.screen_space(true)
.draw(self.draw, self.graphics);
}
}
}
}
}
impl<'a> Renderer<(), ()> for GuiRenderer<'a> {
fn render(
&mut self,
tree: &WidgetUnit,
mapping: &CoordsMapping,
layout: &Layout,
) -> Result<(), ()> {
self.draw_node(tree, mapping, layout);
Ok(())
}
}