Specify different minification and magnification filters

CHANGELOG.md

@@ -12,6 +12,7 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
 * Added `Context::os/Context::set_os` to query/set what operating system egui believes it is running on ([#2202](https://github.com/emilk/egui/pull/2202)).
 * Added `Button::shortcut_text` for showing keyboard shortcuts in menu buttons ([#2202](https://github.com/emilk/egui/pull/2202)).
 * Added `egui::KeyboardShortcut` for showing keyboard shortcuts in menu buttons ([#2202](https://github.com/emilk/egui/pull/2202)).
+* Texture loading now takes a `TexureOptions` with minification and magnification filters ([#2224](https://github.com/emilk/egui/pull/2224)).
 
 ### Fixed 🐛
 * ⚠️ BREAKING: Fix text being too small ([#2069](https://github.com/emilk/egui/pull/2069)).

crates/egui-wgpu/src/renderer.rs

@@ -136,7 +136,7 @@ pub struct Renderer {
     /// sampler.
     textures: HashMap<egui::TextureId, (Option<wgpu::Texture>, wgpu::BindGroup)>,
     next_user_texture_id: u64,
-    samplers: HashMap<egui::TextureFilter, wgpu::Sampler>,
+    samplers: HashMap<egui::TextureOptions, wgpu::Sampler>,
 
     /// Storage for use by [`egui::PaintCallback`]'s that need to store resources such as render
     /// pipelines that must have the lifetime of the renderpass.
@@ -530,8 +530,8 @@ impl Renderer {
             });
             let sampler = self
                 .samplers
-                .entry(image_delta.filter)
-                .or_insert_with(|| create_sampler(image_delta.filter, device));
+                .entry(image_delta.options)
+                .or_insert_with(|| create_sampler(image_delta.options, device));
             let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
                 label,
                 layout: &self.texture_bind_group_layout,
@@ -790,15 +790,22 @@ impl Renderer {
     }
 }
 
-fn create_sampler(filter: egui::TextureFilter, device: &wgpu::Device) -> wgpu::Sampler {
-    let wgpu_filter = match filter {
+fn create_sampler(options: egui::TextureOptions, device: &wgpu::Device) -> wgpu::Sampler {
+    let mag_filter = match options.magnification {
+        egui::TextureFilter::Nearest => wgpu::FilterMode::Nearest,
+        egui::TextureFilter::Linear => wgpu::FilterMode::Linear,
+    };
+    let min_filter = match options.minification {
         egui::TextureFilter::Nearest => wgpu::FilterMode::Nearest,
         egui::TextureFilter::Linear => wgpu::FilterMode::Linear,
     };
     device.create_sampler(&wgpu::SamplerDescriptor {
-        label: Some(&format!("egui sampler ({:?})", filter)),
-        mag_filter: wgpu_filter,
-        min_filter: wgpu_filter,
+        label: Some(&format!(
+            "egui sampler (mag: {:?}, min {:?})",
+            mag_filter, min_filter
+        )),
+        mag_filter,
+        min_filter,
         ..Default::default()
     })
 }

crates/egui/src/context.rs

@@ -6,7 +6,7 @@ use crate::{
     input_state::*, layers::GraphicLayers, memory::Options, os::OperatingSystem,
     output::FullOutput, TextureHandle, *,
 };
-use epaint::{mutex::*, stats::*, text::Fonts, textures::TextureFilter, TessellationOptions, *};
+use epaint::{mutex::*, stats::*, text::Fonts, TessellationOptions, *};
 
 // ----------------------------------------------------------------------------
 
@@ -800,7 +800,7 @@ impl Context {
     ///             ui.ctx().load_texture(
     ///                 "my-image",
     ///                 egui::ColorImage::example(),
-    ///                 egui::TextureFilter::Linear
+    ///                 Default::default()
     ///             )
     ///         });
     ///
@@ -815,7 +815,7 @@ impl Context {
         &self,
         name: impl Into<String>,
         image: impl Into<ImageData>,
-        filter: TextureFilter,
+        options: TextureOptions,
     ) -> TextureHandle {
         let name = name.into();
         let image = image.into();
@@ -829,7 +829,7 @@ impl Context {
             max_texture_side
         );
         let tex_mngr = self.tex_manager();
-        let tex_id = tex_mngr.write().alloc(name, image, filter);
+        let tex_id = tex_mngr.write().alloc(name, image, options);
         TextureHandle::new(tex_mngr, tex_id)
     }
 

crates/egui/src/lib.rs

@@ -332,7 +332,7 @@ pub use epaint::hex_color;
 pub use epaint::{
     color, mutex,
     text::{FontData, FontDefinitions, FontFamily, FontId, FontTweak},
-    textures::{TextureFilter, TexturesDelta},
+    textures::{TextureFilter, TextureOptions, TexturesDelta},
     ClippedPrimitive, Color32, ColorImage, FontImage, ImageData, Mesh, PaintCallback,
     PaintCallbackInfo, Rgba, Rounding, Shape, Stroke, TextureHandle, TextureId,
 };

crates/egui/src/ui.rs

@@ -1553,7 +1553,7 @@ impl Ui {
     ///             ui.ctx().load_texture(
     ///                 "my-image",
     ///                 egui::ColorImage::example(),
-    ///                 egui::TextureFilter::Linear
+    ///                 Default::default()
     ///             )
     ///         });
     ///

crates/egui/src/widgets/image.rs

@@ -18,7 +18,7 @@ use emath::Rot2;
 ///             ui.ctx().load_texture(
 ///                 "my-image",
 ///                 egui::ColorImage::example(),
-///                 egui::TextureFilter::Linear
+///                 Default::default()
 ///             )
 ///         });
 ///

crates/egui_demo_lib/src/color_test.rs

@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use egui::{color::*, widgets::color_picker::show_color, TextureFilter, *};
+use egui::{color::*, widgets::color_picker::show_color, TextureOptions, *};
 
 const GRADIENT_SIZE: Vec2 = vec2(256.0, 18.0);
 
@@ -372,7 +372,7 @@ impl TextureManager {
                     size: [width, height],
                     pixels,
                 },
-                TextureFilter::Linear,
+                TextureOptions::LINEAR,
             )
         })
     }

crates/egui_demo_lib/src/demo/plot_demo.rs

@@ -596,11 +596,8 @@ impl ItemsDemo {
         };
 
         let texture: &egui::TextureHandle = self.texture.get_or_insert_with(|| {
-            ui.ctx().load_texture(
-                "plot_demo",
-                egui::ColorImage::example(),
-                egui::TextureFilter::Linear,
-            )
+            ui.ctx()
+                .load_texture("plot_demo", egui::ColorImage::example(), Default::default())
         });
         let image = PlotImage::new(
             texture,

crates/egui_demo_lib/src/demo/widget_gallery.rs

@@ -115,11 +115,8 @@ impl WidgetGallery {
         } = self;
 
         let texture: &egui::TextureHandle = texture.get_or_insert_with(|| {
-            ui.ctx().load_texture(
-                "example",
-                egui::ColorImage::example(),
-                egui::TextureFilter::Linear,
-            )
+            ui.ctx()
+                .load_texture("example", egui::ColorImage::example(), Default::default())
         });
 
         ui.add(doc_link_label("Label", "label,heading"));

crates/egui_extras/src/image.rs

@@ -1,5 +1,4 @@
-use egui::mutex::Mutex;
-use egui::TextureFilter;
+use egui::{mutex::Mutex, TextureFilter, TextureOptions};
 
 /// An image to be shown in egui.
 ///
@@ -13,7 +12,7 @@ pub struct RetainedImage {
     image: Mutex<egui::ColorImage>,
     /// Lazily loaded when we have an egui context.
     texture: Mutex<Option<egui::TextureHandle>>,
-    filter: TextureFilter,
+    options: TextureOptions,
 }
 
 impl RetainedImage {
@@ -23,7 +22,7 @@ impl RetainedImage {
             size: image.size,
             image: Mutex::new(image),
             texture: Default::default(),
-            filter: Default::default(),
+            options: Default::default(),
         }
     }
 
@@ -68,15 +67,15 @@ impl RetainedImage {
         Self::from_svg_bytes(debug_name, svg_str.as_bytes())
     }
 
-    /// Set the texture filter to use for the image.
+    /// Set the texture filters to use for the image.
     ///
     /// **Note:** If the texture has already been uploaded to the GPU, this will require
     /// re-uploading the texture with the updated filter.
     ///
     /// # Example
     /// ```rust
     /// # use egui_extras::RetainedImage;
-    /// # use egui::{Color32, epaint::{ColorImage, textures::TextureFilter}};
+    /// # use egui::{Color32, epaint::{ColorImage, textures::TextureOptions}};
     /// # let pixels = vec![Color32::BLACK];
     /// # let color_image = ColorImage {
     /// #   size: [1, 1],
@@ -85,10 +84,10 @@ impl RetainedImage {
     /// #
     /// // Upload a pixel art image without it getting blurry when resized
     /// let image = RetainedImage::from_color_image("my_image", color_image)
-    ///     .with_texture_filter(TextureFilter::Nearest);
+    ///     .with_options(TextureOptions::NEAREST);
     /// ```
-    pub fn with_texture_filter(mut self, filter: TextureFilter) -> Self {
-        self.filter = filter;
+    pub fn with_options(mut self, options: TextureOptions) -> Self {
+        self.options = options;
 
         // If the texture has already been uploaded, this will force it to be re-uploaded with the
         // updated filter.
@@ -97,6 +96,14 @@ impl RetainedImage {
         self
     }
 
+    #[deprecated = "Use with_options instead"]
+    pub fn with_texture_filter(self, filter: TextureFilter) -> Self {
+        self.with_options(TextureOptions {
+            magnification: filter,
+            minification: filter,
+        })
+    }
+
     /// The size of the image data (number of pixels wide/high).
     pub fn size(&self) -> [usize; 2] {
         self.size
@@ -130,7 +137,7 @@ impl RetainedImage {
             .get_or_insert_with(|| {
                 let image: &mut ColorImage = &mut self.image.lock();
                 let image = std::mem::take(image);
-                ctx.load_texture(&self.debug_name, image, self.filter)
+                ctx.load_texture(&self.debug_name, image, self.options)
             })
             .id()
     }

crates/egui_glium/examples/native_texture.rs

@@ -18,7 +18,7 @@ fn main() {
     // Allocate egui's texture id for GL texture
     let texture_id = egui_glium
         .painter
-        .register_native_texture(glium_texture, egui::TextureFilter::Linear);
+        .register_native_texture(glium_texture, Default::default());
     // Setup button image size for reasonable image size for button container.
     let button_image_size = egui::vec2(32_f32, 32_f32);
 

crates/egui_glium/src/painter.rs

@@ -1,7 +1,10 @@
 #![allow(deprecated)] // legacy implement_vertex macro
 #![allow(semicolon_in_expressions_from_macros)] // glium::program! macro
 
-use egui::{epaint::Primitive, TextureFilter};
+use egui::{
+    epaint::{textures::TextureFilter, Primitive},
+    TextureOptions,
+};
 
 use {
     egui::{emath::Rect, epaint::Mesh},
@@ -10,7 +13,7 @@ use {
         index::PrimitiveType,
         texture::{self, srgb_texture2d::SrgbTexture2d},
         uniform,
-        uniforms::{MagnifySamplerFilter, SamplerWrapFunction},
+        uniforms::{MagnifySamplerFilter, MinifySamplerFilter, SamplerWrapFunction},
     },
     std::rc::Rc,
 };
@@ -191,14 +194,25 @@ impl Painter {
 
         if let Some(texture) = self.texture(mesh.texture_id) {
             // The texture coordinates for text are so that both nearest and linear should work with the egui font texture.
-            let filter = match texture.filter {
+            let mag_filter = match texture.options.magnification {
                 TextureFilter::Nearest => MagnifySamplerFilter::Nearest,
                 TextureFilter::Linear => MagnifySamplerFilter::Linear,
             };
+            let min_filter = match texture.options.minification {
+                TextureFilter::Nearest => MinifySamplerFilter::Nearest,
+                TextureFilter::Linear => MinifySamplerFilter::Linear,
+            };
+
+            let sampler = texture
+                .glium_texture
+                .sampled()
+                .magnify_filter(mag_filter)
+                .minify_filter(min_filter)
+                .wrap_function(SamplerWrapFunction::Clamp);
 
             let uniforms = uniform! {
                 u_screen_size: [width_in_points, height_in_points],
-                u_sampler: texture.glium_texture.sampled().magnify_filter(filter).wrap_function(SamplerWrapFunction::Clamp),
+                u_sampler: sampler,
             };
 
             // egui outputs colors with premultiplied alpha:
@@ -309,13 +323,13 @@ impl Painter {
                     .main_level()
                     .write(rect, glium_image);
 
-                user_texture.filter = delta.filter;
+                user_texture.options = delta.options;
             }
         } else {
             let gl_texture =
                 SrgbTexture2d::with_format(facade, glium_image, format, mipmaps).unwrap();
 
-            let user_texture = EguiTexture::new(gl_texture.into(), delta.filter);
+            let user_texture = EguiTexture::new(gl_texture.into(), delta.options);
             self.textures.insert(tex_id, user_texture);
         }
     }
@@ -331,12 +345,12 @@ impl Painter {
     pub fn register_native_texture(
         &mut self,
         native: Rc<SrgbTexture2d>,
-        filter: TextureFilter,
+        options: TextureOptions,
     ) -> egui::TextureId {
         let id = egui::TextureId::User(self.next_native_tex_id);
         self.next_native_tex_id += 1;
 
-        let texture = EguiTexture::new(native, filter);
+        let texture = EguiTexture::new(native, options);
         self.textures.insert(id, texture);
         id
     }
@@ -345,23 +359,23 @@ impl Painter {
         &mut self,
         id: egui::TextureId,
         replacing: Rc<SrgbTexture2d>,
-        filter: TextureFilter,
+        options: TextureOptions,
     ) {
-        let texture = EguiTexture::new(replacing, filter);
+        let texture = EguiTexture::new(replacing, options);
         self.textures.insert(id, texture);
     }
 }
 
 struct EguiTexture {
     glium_texture: Rc<SrgbTexture2d>,
-    filter: TextureFilter,
+    options: TextureOptions,
 }
 
 impl EguiTexture {
-    fn new(glium_texture: Rc<SrgbTexture2d>, filter: TextureFilter) -> Self {
+    fn new(glium_texture: Rc<SrgbTexture2d>, options: TextureOptions) -> Self {
         Self {
             glium_texture,
-            filter,
+            options,
         }
     }
 }