misc. font rendering changes in kui, minor backend api change

Cargo.lock

@@ -1034,19 +1034,28 @@ version = "0.0.0"
 dependencies = [
  "fontdue",
  "glam",
- "glium",
  "hashbrown",
- "kubi-logging",
- "kubi-ui-glium",
  "log",
  "nohash-hasher",
  "rect_packer",
+]
+
+[[package]]
+name = "kubi-ui-examples"
+version = "0.0.0"
+dependencies = [
+ "glam",
+ "glium",
+ "kubi-logging",
+ "kubi-ui",
+ "kubi-ui-glium",
+ "log",
  "winit",
 ]
 
 [[package]]
 name = "kubi-ui-glium"
-version = "0.1.0"
+version = "0.0.0"
 dependencies = [
  "glam",
  "glium",

Cargo.toml

@@ -1,5 +1,14 @@
 [workspace]
-members = ["kubi", "kubi-server", "kubi-shared", "kubi-logging", "kubi-pool", "kubi-ui", "kubi-ui-glium"]
+members = [
+  "kubi",
+  "kubi-server",
+  "kubi-shared",
+  "kubi-logging",
+  "kubi-pool",
+  "kubi-ui",
+  "kubi-ui-glium",
+  "kubi-ui-examples"
+]
 default-members = ["kubi"]
 resolver = "2"
 

kubi-ui-examples/Cargo.toml

@@ -0,0 +1,16 @@
+#created as a workaround for rust-analyzer dependency cycle (which should be allowed)
+
+[package]
+name = "kubi-ui-examples"
+version = "0.0.0"
+edition = "2021"
+publish = false
+
+[dev-dependencies]
+kubi-ui = { path = "../kubi-ui" }
+kubi-ui-glium = { path = "../kubi-ui-glium" }
+kubi-logging = { path = "../kubi-logging" }
+glium = { git = "https://github.com/glium/glium", rev = "968fc92378caf" }
+winit = "0.29"
+glam = "0.24"
+log = "0.4"

kubi-ui-examples/examples/stress.rs

@@ -79,10 +79,7 @@ fn main() {
 
         kui.end();
 
-        let plan = kui.draw_plan();
-        if plan.0 {
-          backend.update(plan.1);
-        }
+        backend.update(&kui);
         backend.draw(&mut frame, resolution);
 
         frame.finish().unwrap();

kubi-ui-examples/examples/test.rs

@@ -15,7 +15,7 @@ use kubi_ui::{
   },
   interaction::IntoInteractable,
   UiSize,
-  UiDirection,
+  UiDirection, IfModified,
 };
 use kubi_ui_glium::GliumUiRenderer;
 
@@ -135,10 +135,7 @@ fn main() {
 
         kui.end();
 
-        let plan = kui.draw_plan();
-        if plan.0 {
-          backend.update(plan.1);
-        }
+        backend.update(&kui);
         backend.draw(&mut frame, resolution);
 
         frame.finish().unwrap();

kubi-ui-glium/Cargo.toml

@@ -1,11 +1,12 @@
 [package]
 name = "kubi-ui-glium"
-version = "0.1.0"
+version = "0.0.0"
 edition = "2021"
 publish = false
 
 [dependencies]
-glium = { git = "https://github.com/glium/glium", rev = "968fc92378caf" }
 kubi-ui = { path = "../kubi-ui", default-features = false }
+#kubi-ui = { path = "../kubi-ui" }
+glium = { git = "https://github.com/glium/glium", rev = "968fc92378caf" }
 glam = "0.24"
 log = "0.4"

kubi-ui-glium/src/lib.rs

@@ -4,9 +4,13 @@ use glium::{
   Program, VertexBuffer, IndexBuffer,
   backend::Facade,
   index::PrimitiveType,
-  implement_vertex, uniform,
+  implement_vertex, uniform, texture::{SrgbTexture2d, RawImage2d},
+};
+use kubi_ui::{
+  KubiUi,
+  draw::{UiDrawPlan, UiVertex},
+  text::FontTextureInfo, IfModified,
 };
-use kubi_ui::draw::{UiDrawPlan, UiVertex};
 
 const VERTEX_SHADER: &str = include_str!("../shaders/vertex.vert");
 const FRAGMENT_SHADER: &str = include_str!("../shaders/fragment.frag");
@@ -114,13 +118,31 @@ impl GliumUiRenderer {
     }
   }
 
-  pub fn update(&mut self, plan: &UiDrawPlan) {
+  pub fn update_draw_plan(&mut self, plan: &UiDrawPlan) {
     assert!(plan.calls.len() == 1, "multiple draw calls not supported yet");
     let data_vtx = &plan.calls[0].vertices.iter().copied().map(Vertex::from).collect::<Vec<_>>();
     let data_idx = &plan.calls[0].indices;
     self.buffer.write_data(data_vtx, data_idx);
   }
 
+  pub fn update_font_texture(&mut self, font_texture: &FontTextureInfo) {
+    //HACK: get context from buffer
+    let ctx = self.buffer.index_buffer.get_context();
+    SrgbTexture2d::new(ctx, RawImage2d::from_raw_rgb(
+      font_texture.data.to_owned(),
+      (font_texture.size.x, font_texture.size.y)
+    )).unwrap();
+  }
+
+  pub fn update(&mut self, kui: &KubiUi) {
+    if let Some(plan) = kui.draw_plan().if_modified() {
+      self.update_draw_plan(plan);
+    }
+    if let Some(texture) = kui.font_texture().if_modified() {
+      self.update_font_texture(texture);
+    }
+  }
+
   pub fn draw(&self, frame: &mut glium::Frame, resolution: Vec2) {
     if self.buffer.is_empty() {
       return

kubi-ui/Cargo.toml

@@ -12,12 +12,6 @@ fontdue = "0.8"
 rect_packer = "0.2"
 log = "0.4"
 
-[dev-dependencies]
-kubi-logging = { path = "../kubi-logging" }
-kubi-ui-glium = { path = "../kubi-ui-glium" }
-glium = { git = "https://github.com/glium/glium", rev = "968fc92378caf" }
-winit = "0.29"
-
 [features]
 default = ["builtin_elements", "builtin_font"]
 builtin_font = []

kubi-ui/src/draw.rs

@@ -1,3 +1,5 @@
+use crate::IfModified;
+
 use std::borrow::Cow;
 use glam::{Vec2, Vec4, vec2};
 
@@ -101,3 +103,12 @@ impl UiDrawPlan {
     }
   }
 }
+
+impl IfModified<UiDrawPlan> for (bool, &UiDrawPlan) {
+  fn if_modified(&self) -> Option<&UiDrawPlan> {
+    match self.0 {
+      true => Some(self.1),
+      false => None,
+    }
+  }
+}

kubi-ui/src/lib.rs

@@ -13,36 +13,41 @@ use element::UiElement;
 use state::StateRepo;
 use event::UiEvent;
 use draw::{UiDrawCommands, UiDrawPlan};
+use text::{TextRenderer, FontTextureInfo};
 
 // pub struct ElementContext<'a> {
 //   pub state: &'a mut StateRepo,
 //   pub draw: &'a mut UiDrawCommands,
 //   pub text: &'a mut TextRenderer,
 // }
+pub trait IfModified<T> {
+  fn if_modified(&self) -> Option<&T>;
+}
 
 pub struct KubiUi {
-  mouse_position: Vec2,
+  //mouse_position: Vec2,
   stateful_state: StateRepo,
-  event_queue: VecDeque<UiEvent>,
+  //event_queue: VecDeque<UiEvent>,
   prev_draw_commands: UiDrawCommands,
   draw_commands: UiDrawCommands,
   draw_plan: UiDrawPlan,
   draw_plan_modified: bool,
-  // ftm: FontTextureManager,
+  text_renderer: TextRenderer,
 }
 
 impl KubiUi {
   pub fn new() -> Self {
     KubiUi {
-      mouse_position: Vec2::ZERO,
+      //mouse_position: Vec2::ZERO,
       stateful_state: StateRepo::default(),
-      event_queue: VecDeque::new(),
+      //event_queue: VecDeque::new(),
       // root_elements: Vec::new(),
       prev_draw_commands: UiDrawCommands::default(),
       draw_commands: UiDrawCommands::default(),
       draw_plan: UiDrawPlan::default(),
       draw_plan_modified: false,
       // ftm: FontTextureManager::default(),
+      text_renderer: TextRenderer::new(),
     }
   }
 
@@ -60,6 +65,7 @@ impl KubiUi {
     std::mem::swap(&mut self.prev_draw_commands, &mut self.draw_commands);
     self.draw_plan_modified = false;
     self.draw_commands.commands.clear();
+    self.text_renderer.reset_frame();
   }
 
   pub fn end(&mut self) {
@@ -73,6 +79,10 @@ impl KubiUi {
   pub fn draw_plan(&self) -> (bool, &UiDrawPlan) {
     (self.draw_plan_modified, &self.draw_plan)
   }
+
+  pub fn font_texture(&self) -> FontTextureInfo {
+    self.text_renderer.font_texture()
+  }
 }
 
 impl Default for KubiUi {

kubi-ui/src/text.rs

@@ -1,2 +1,41 @@
-pub mod font;
-pub mod ftm;
+use std::sync::Arc;
+
+mod font;
+mod ftm;
+
+use font::FontManager;
+pub use font::FontHandle;
+use ftm::FontTextureManager;
+pub use ftm::{FontTextureInfo, GlyphCacheEntry};
+
+pub struct TextRenderer {
+  fm: FontManager,
+  ftm: FontTextureManager,
+}
+
+impl TextRenderer {
+  pub fn new() -> Self {
+    Self {
+      fm: FontManager::new(),
+      ftm: FontTextureManager::default(),
+    }
+  }
+
+  pub fn reset_frame(&mut self) {
+    self.ftm.reset_modified();
+  }
+
+  pub fn font_texture(&self) -> FontTextureInfo {
+    self.ftm.info()
+  }
+
+  pub fn glyph(&mut self, font_handle: FontHandle, character: char, size: u8) -> Arc<GlyphCacheEntry> {
+    self.ftm.glyph(&self.fm, font_handle, character, size)
+  }
+}
+
+impl Default for TextRenderer {
+  fn default() -> Self {
+    Self::new()
+  }
+}

kubi-ui/src/text/font.rs

@@ -36,3 +36,9 @@ impl FontManager {
     self.fonts.get(handle.0)
   }
 }
+
+impl Default for FontManager {
+  fn default() -> Self {
+    Self::new()
+  }
+}

kubi-ui/src/text/ftm.rs

@@ -4,6 +4,8 @@ use glam::{IVec2, UVec2, uvec2, ivec2};
 use hashbrown::HashMap;
 use rect_packer::DensePacker;
 
+use crate::IfModified;
+
 use super::font::{FontHandle, FontManager};
 
 
@@ -15,13 +17,38 @@ struct GlyphCacheKey {
   size: u8,
 }
 
-struct GlyphCacheEntry {
+pub struct GlyphCacheEntry {
   pub data: Vec<u8>,
   pub metrics: Metrics,
   pub position: IVec2,
   pub size: UVec2,
 }
 
+#[derive(Clone, Copy, Debug)]
+pub struct FontTextureInfo<'a> {
+  pub modified: bool,
+  pub data: &'a [u8],
+  pub size: UVec2,
+}
+
+impl<'a> IfModified<FontTextureInfo<'a>> for FontTextureInfo<'a> {
+  fn if_modified(&self) -> Option<&Self> {
+    match self.modified {
+      true => Some(self),
+      false => None,
+    }
+  }
+}
+
+// impl<'a> FontTextureInfo<'a> {
+//   fn if_modified(&self) -> Option<Self> {
+//     match self.modified {
+//       true => Some(*self),
+//       false => None,
+//     }
+//   }
+// }
+
 pub struct FontTextureManager {
   glyph_cache: HashMap<GlyphCacheKey, Arc<GlyphCacheEntry>>,
   packer: DensePacker,
@@ -32,14 +59,25 @@ pub struct FontTextureManager {
 
 impl FontTextureManager {
   pub fn new(size: UVec2) -> Self {
-    let mut renderer = FontTextureManager {
+    FontTextureManager {
       glyph_cache: HashMap::new(),
       packer: DensePacker::new(size.x as i32, size.y as i32),
       font_texture: vec![0; (size.x * size.y) as usize],
       font_texture_size: size,
       modified: false,
-    };
-    renderer
+    }
+  }
+
+  pub fn reset_modified(&mut self) {
+    self.modified = false;
+  }
+
+  pub fn info(&self) -> FontTextureInfo {
+    FontTextureInfo {
+      modified: self.modified,
+      data: &self.font_texture,
+      size: self.font_texture_size,
+    }
   }
 
   /// Either looks up the glyph in the cache or renders it and adds it to the cache.

kubi/src/guiv2_integration.rs

@@ -31,10 +31,7 @@ pub fn kubi_ui_end(
   let ui: &mut UiState = &mut ui;
   let UiState { kui, renderer } = ui;
   kui.end();
-  let (upload_needed, plan) = kui.draw_plan();
-  if upload_needed {
-    renderer.update(plan);
-  }
+  renderer.update(kui);
 }
 
 pub fn kubi_ui_draw(