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Texture loading in egui (#1110)

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* Move texture allocation into epaint/egui proper
* Add TextureHandle
* egui_glow: cast using bytemuck instead of unsafe code
* Optimize glium painter
* Optimize WebGL
* Add example of loading an image from file
This commit is contained in:
Emil Ernerfeldt
2022-01-15 13:59:52 +01:00
committed by GitHub
parent 6c616a1b69
commit 66d80e2519
59 changed files with 1297 additions and 860 deletions
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17
egui_demo_lib/src/apps/demo/plot_demo.rs
View File

@@ -306,9 +306,9 @@ impl Widget for &mut LegendDemo {
}
#[derive(PartialEq, Default)]
struct ItemsDemo {}
impl ItemsDemo {}
struct ItemsDemo {
texture: Option<egui::TextureHandle>,
}
impl Widget for &mut ItemsDemo {
fn ui(self, ui: &mut Ui) -> Response {
@@ -343,12 +343,17 @@ impl Widget for &mut ItemsDemo {
);
Arrows::new(arrow_origins, arrow_tips)
};
let texture: &egui::TextureHandle = self.texture.get_or_insert_with(|| {
ui.ctx()
.load_texture("plot_demo", egui::ColorImage::example())
});
let image = PlotImage::new(
TextureId::Egui,
texture,
Value::new(0.0, 10.0),
[
ui.fonts().font_image().width as f32 / 100.0,
ui.fonts().font_image().height as f32 / 100.0,
ui.fonts().font_image().width() as f32 / 100.0,
ui.fonts().font_image().height() as f32 / 100.0,
],
);

20
egui_demo_lib/src/apps/demo/widget_gallery.rs
View File

@@ -17,6 +17,8 @@ pub struct WidgetGallery {
string: String,
color: egui::Color32,
animate_progress_bar: bool,
#[cfg_attr(feature = "serde", serde(skip))]
texture: Option<egui::TextureHandle>,
}
impl Default for WidgetGallery {
@@ -30,6 +32,7 @@ impl Default for WidgetGallery {
string: Default::default(),
color: egui::Color32::LIGHT_BLUE.linear_multiply(0.5),
animate_progress_bar: false,
texture: None,
}
}
}
@@ -99,8 +102,14 @@ impl WidgetGallery {
string,
color,
animate_progress_bar,
texture,
} = self;
let texture: &egui::TextureHandle = texture.get_or_insert_with(|| {
ui.ctx()
.load_texture("example", egui::ColorImage::example())
});
ui.add(doc_link_label("Label", "label,heading"));
ui.label("Welcome to the widget gallery!");
ui.end_row();
@@ -180,17 +189,14 @@ impl WidgetGallery {
ui.color_edit_button_srgba(color);
ui.end_row();
let img_size = 16.0 * texture.size_vec2() / texture.size_vec2().y;
ui.add(doc_link_label("Image", "Image"));
ui.image(egui::TextureId::Egui, [24.0, 16.0])
.on_hover_text("The egui font texture was the convenient choice to show here.");
ui.image(texture, img_size);
ui.end_row();
ui.add(doc_link_label("ImageButton", "ImageButton"));
if ui
.add(egui::ImageButton::new(egui::TextureId::Egui, [24.0, 16.0]))
.on_hover_text("The egui font texture was the convenient choice to show here.")
.clicked()
{
if ui.add(egui::ImageButton::new(texture, img_size)).clicked() {
*boolean = !*boolean;
}
ui.end_row();