From 2c8360de342872f65bdef037f3fb5d598b8f26a0 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Fri, 10 Jan 2025 22:04:34 +0100
Subject: unprojecting to ui surf is hard

---
 client/src/ui.rs | 70 ++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 50 insertions(+), 20 deletions(-)

(limited to 'client/src/ui.rs')

diff --git a/client/src/ui.rs b/client/src/ui.rs
index 54192e4..13e58d0 100644
--- a/client/src/ui.rs
+++ b/client/src/ui.rs
@@ -15,10 +15,10 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 use egui::{
-    Context, ImageData, TextureId, ViewportId, ViewportInfo,
+    Context, Event, ImageData, TextureId, ViewportId, ViewportInfo,
     epaint::{ImageDelta, Primitive, Vertex},
 };
-use glam::{Affine3A, Mat2, Mat3, Mat4};
+use glam::{Affine3A, Mat2, Mat3, Mat4, Vec2, vec2};
 use log::info;
 use rand::random;
 use std::{
@@ -36,13 +36,15 @@ use wgpu::{
     PrimitiveTopology, PushConstantRange, Queue, RenderPassColorAttachment,
     RenderPassDepthStencilAttachment, RenderPassDescriptor, RenderPipeline,
     RenderPipelineDescriptor, SamplerBindingType, SamplerDescriptor, ShaderStages, StoreOp,
-    Texture, TextureAspect, TextureDescriptor, TextureDimension, TextureFormat, TextureSampleType,
-    TextureUsages, TextureView, TextureViewDescriptor, TextureViewDimension, VertexBufferLayout,
-    VertexState, VertexStepMode, include_wgsl,
+    SurfaceConfiguration, Texture, TextureAspect, TextureDescriptor, TextureDimension,
+    TextureFormat, TextureSampleType, TextureUsages, TextureView, TextureViewDescriptor,
+    TextureViewDimension, VertexBufferLayout, VertexState, VertexStepMode, include_wgsl,
     util::{DeviceExt, TextureDataOrder},
     vertex_attr_array,
 };
 
+use crate::state::InputState;
+
 pub struct UiRenderer {
     device: Arc<Device>,
     queue: Arc<Queue>,
@@ -55,7 +57,8 @@ pub struct UiRenderer {
 
 pub struct UiSurface {
     pub transform: Affine3A,
-    pub content: Arc<dyn Fn(&Context) + Send + Sync + 'static>,
+    pub content: Arc<dyn Fn(&Context) -> bool + Send + Sync + 'static>,
+    size: Vec2,
     index: Buffer,
     index_capacity: usize,
     vertex: Buffer,
@@ -149,7 +152,7 @@ impl UiRenderer {
     pub fn add_surface(
         &mut self,
         transform: Affine3A,
-        content: impl Fn(&Context) + Send + Sync + 'static,
+        content: impl Fn(&Context) -> bool + Send + Sync + 'static,
     ) {
         let index_capacity = 1024;
         let vertex_capacity = 1024;
@@ -165,17 +168,17 @@ impl UiRenderer {
             usage: BufferUsages::VERTEX | BufferUsages::COPY_DST,
             mapped_at_creation: false,
         });
-        self.surfaces.write().unwrap().insert(
-            ViewportId::from_hash_of(random::<u128>()),
-            UiSurface {
-                transform,
-                content: Arc::new(content),
-                index,
-                vertex,
-                index_capacity,
-                vertex_capacity,
-            },
-        );
+        let id = ViewportId::from_hash_of(random::<u128>());
+        info!("ui surface added: {id:?}");
+        self.surfaces.write().unwrap().insert(id, UiSurface {
+            transform,
+            content: Arc::new(content),
+            index,
+            vertex,
+            index_capacity,
+            vertex_capacity,
+            size: Vec2::ZERO,
+        });
     }
 
     pub fn apply_texture_delta(&self, texid: TextureId, delta: ImageDelta) {
@@ -273,6 +276,8 @@ impl UiRenderer {
         target: &TextureView,
         depth: &TextureView,
         projection: Mat4,
+        input_state: &InputState,
+        surface_configuration: &SurfaceConfiguration,
     ) {
         let mut surfaces = self.surfaces.write().unwrap();
         if surfaces.is_empty() {
@@ -302,7 +307,20 @@ impl UiRenderer {
 
         rpass.set_pipeline(&self.pipeline);
 
+        let _screen_size = vec2(
+            surface_configuration.width as f32,
+            surface_configuration.height as f32,
+        );
+
         let mut raw_input = egui::RawInput::default();
+        raw_input.events.push(Event::PointerMoved(egui::Pos2::new(
+            input_state.cursor_pos.x,
+            input_state.cursor_pos.y,
+        )));
+        raw_input
+            .events
+            .extend(input_state.egui_events.iter().cloned());
+
         raw_input.viewport_id = surfaces.keys().next().copied().unwrap();
         raw_input.viewports = surfaces
             .keys()
@@ -314,8 +332,16 @@ impl UiRenderer {
             })
             .collect();
 
-        for (_viewport_id, surf) in surfaces.iter_mut() {
-            let full_output = self.ctx.run(raw_input.clone(), |ctx| (surf.content)(ctx));
+        let mut surfaces_closed = Vec::new();
+        for (viewport_id, surf) in surfaces.iter_mut() {
+            let mut close = false;
+            let full_output = self.ctx.run(raw_input.clone(), |ctx| {
+                close = !(surf.content)(ctx);
+                surf.size = Vec2::new(ctx.used_size().x, ctx.used_size().y)
+            });
+            if close {
+                surfaces_closed.push(*viewport_id)
+            }
 
             for (texid, delta) in full_output.textures_delta.set {
                 self.apply_texture_delta(texid, delta);
@@ -428,5 +454,9 @@ impl UiRenderer {
                 rpass.draw_indexed(index, base_vertex, 0..1);
             }
         }
+        for s in surfaces_closed {
+            info!("ui surface closed: {s:?}");
+            surfaces.remove(&s);
+        }
     }
 }
-- 
cgit v1.2.3-70-g09d2