Merged image and svg texture atlases into one owned by the image pipeline.

3 files changed, 90 insertions, 159 deletions

diff --git a/wgpu/src/image.rs b/wgpu/src/image.rs
index 65780886..aaecd492 100644
--- a/wgpu/src/image.rs
+++ b/wgpu/src/image.rs
@@ -14,7 +14,10 @@ use std::mem;
 #[cfg(any(feature = "image", feature = "svg"))]
 use std::{cell::RefCell, collections::HashMap};
 
-#[derive(Debug)]
+use guillotiere::{AtlasAllocator, Size};
+use debug_stub_derive::*;
+
+#[derive(DebugStub)]
 pub struct Pipeline {
     #[cfg(feature = "image")]
     raster_cache: RefCell<raster::Cache>,
@@ -28,6 +31,9 @@ pub struct Pipeline {
     instances: wgpu::Buffer,
     constants: wgpu::BindGroup,
     texture_layout: wgpu::BindGroupLayout,
+    #[debug_stub="ReplacementValue"]
+    allocator: AtlasAllocator,
+    atlas: wgpu::Texture,
 }
 
 impl Pipeline {
@@ -208,12 +214,32 @@ impl Pipeline {
             usage: wgpu::BufferUsage::VERTEX | wgpu::BufferUsage::COPY_DST,
         });
 
+        let (width, height) = (512, 512);
+
+        let extent = wgpu::Extent3d {
+            width,
+            height,
+            depth: 1,
+        };
+
+        let atlas = device.create_texture(&wgpu::TextureDescriptor {
+            size: extent,
+            array_layer_count: 1,
+            mip_level_count: 1,
+            sample_count: 1,
+            dimension: wgpu::TextureDimension::D2,
+            format: wgpu::TextureFormat::Bgra8UnormSrgb,
+            usage: wgpu::TextureUsage::COPY_DST
+                | wgpu::TextureUsage::COPY_SRC
+                | wgpu::TextureUsage::SAMPLED,
+        });
+
         Pipeline {
             #[cfg(feature = "image")]
-            raster_cache: RefCell::new(raster::Cache::new(&device)),
+            raster_cache: RefCell::new(raster::Cache::new()),
 
             #[cfg(feature = "svg")]
-            vector_cache: RefCell::new(vector::Cache::new(&device)),
+            vector_cache: RefCell::new(vector::Cache::new()),
 
             pipeline,
             uniforms: uniforms_buffer,
@@ -222,6 +248,8 @@ impl Pipeline {
             instances,
             constants: constant_bind_group,
             texture_layout,
+            allocator: AtlasAllocator::new(Size::new(width as i32, height as i32)),
+            atlas,
         }
     }
 
@@ -276,10 +304,12 @@ impl Pipeline {
                         let mut raster_cache = self.raster_cache.borrow_mut();
 
                         if let Memory::Device(allocation) = raster_cache.upload(
-                            _handle,
+                            handle,
                             device,
-                            encoder)
-                        {
+                            encoder,
+                            &mut self.allocator,
+                            &mut self.atlas
+                        ) {
                             let rec = allocation.rectangle;
 
                             let _ = recs.insert(index, rec);
@@ -291,12 +321,15 @@ impl Pipeline {
                     {
                         let mut vector_cache = self.vector_cache.borrow_mut();
 
+                        // Upload rasterized svg to texture atlas
                         if let Some(allocation) = vector_cache.upload(
                             _handle,
                             image.scale,
                             _scale,
                             device,
                             encoder,
+                            &mut self.allocator,
+                            &mut self.atlas,
                         ) {
                             let rec = allocation.rectangle;
 
@@ -307,30 +340,34 @@ impl Pipeline {
             }
         }
 
-        #[cfg(feature = "image")]
-        let raster_atlas = self.raster_cache.borrow().atlas(device, &self.texture_layout);
-
-        #[cfg(feature = "svg")]
-        let vector_atlas = self.vector_cache.borrow().atlas(device, &self.texture_layout);
+        let atlas_width = self.allocator.size().width as f32;
+        let atlas_height = self.allocator.size().height as f32;
+
+        let texture = device.create_bind_group(&wgpu::BindGroupDescriptor {
+            layout: &self.texture_layout,
+            bindings: &[wgpu::Binding {
+                binding: 0,
+                resource: wgpu::BindingResource::TextureView(
+                    &self.atlas.create_default_view(),
+                ),
+            }],
+        });
 
         #[cfg(any(feature = "image", feature = "svg"))]
         for (index, image) in instances.iter().enumerate() {
             if let Some(rec) = recs.get(&index) {
-                let atlas_size = match image.handle {
-                    #[cfg(feature = "image")]
-                    Handle::Raster(_) => self.raster_cache.borrow().atlas_size(),
-                    #[cfg(feature = "svg")]
-                    Handle::Vector(_) => self.vector_cache.borrow().atlas_size(),
-                    _ => guillotiere::Size::new(0, 0)
-                };
+                let x = rec.min.x as f32 / atlas_width;
+                let y = rec.min.y as f32 / atlas_height;
+                let w = (rec.size().width - 1) as f32 / atlas_width;
+                let h = (rec.size().height - 1) as f32 / atlas_height;
 
                 let instance_buffer = device
                     .create_buffer_mapped(1, wgpu::BufferUsage::COPY_SRC)
                     .fill_from_slice(&[Instance {
                         _position: image.position,
                         _scale: image.scale,
-                        _position_in_atlas: [rec.min.x as f32 / atlas_size.width as f32, rec.min.y as f32 / atlas_size.height as f32],
-                        _scale_in_atlas: [rec.size().width as f32 / atlas_size.width as f32, rec.size().height as f32 / atlas_size.height as f32]
+                        _position_in_atlas: [x, y],
+                        _scale_in_atlas: [w, h]
                     }]);
 
                 encoder.copy_buffer_to_buffer(
@@ -341,17 +378,6 @@ impl Pipeline {
                     mem::size_of::<Instance>() as u64,
                 );
 
-                let texture = match &image.handle {
-                    #[cfg(feature = "image")]
-                    Handle::Raster(_) => &raster_atlas,
-                    #[cfg(feature = "svg")]
-                    Handle::Vector(_) => &vector_atlas,
-                    #[cfg(feature = "image")]
-                    _ => &raster_atlas,
-                    #[cfg(feature = "svg")]
-                    _ => &vector_atlas,
-                };
-
                 let mut render_pass = encoder.begin_render_pass(
                     &wgpu::RenderPassDescriptor {
                         color_attachments: &[
@@ -398,10 +424,10 @@ impl Pipeline {
 
     pub fn trim_cache(&mut self) {
         #[cfg(feature = "image")]
-        self.raster_cache.borrow_mut().trim();
+        self.raster_cache.borrow_mut().trim(&mut self.allocator);
 
         #[cfg(feature = "svg")]
-        self.vector_cache.borrow_mut().trim();
+        self.vector_cache.borrow_mut().trim(&mut self.allocator);
     }
 }
 
diff --git a/wgpu/src/image/raster.rs b/wgpu/src/image/raster.rs
index 0418bc0b..651ec078 100644
--- a/wgpu/src/image/raster.rs
+++ b/wgpu/src/image/raster.rs
@@ -1,13 +1,14 @@
 use iced_native::image;
 use std::{
     collections::{HashMap, HashSet},
-    fmt,
 };
 use guillotiere::{Allocation, AtlasAllocator, Size};
+use debug_stub_derive::*;
 
+#[derive(DebugStub)]
 pub enum Memory {
     Host(::image::ImageBuffer<::image::Bgra<u8>, Vec<u8>>),
-    Device(Allocation),
+    Device(#[debug_stub="ReplacementValue"]Allocation),
     NotFound,
     Invalid,
 }
@@ -26,49 +27,15 @@ impl Memory {
     }
 }
 
+#[derive(Debug)]
 pub struct Cache {
-    allocator: AtlasAllocator,
-    atlas: wgpu::Texture,
     map: HashMap<u64, Memory>,
     hits: HashSet<u64>,
 }
 
-impl fmt::Debug for Cache {
-    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt.debug_struct("Vector Cache")
-            .field("allocator", &String::from("AtlasAllocator"))
-            .field("atlas", &self.atlas)
-            .field("map", &String::from("HashMap<u64, Memory>"))
-            .field("hits", &self.hits)
-            .finish()
-    }
-}
-
 impl Cache {
-    pub fn new(device: &wgpu::Device) -> Self {
-        let (width, height) = (1000, 1000);
-
-        let extent = wgpu::Extent3d {
-            width,
-            height,
-            depth: 1,
-        };
-
-        let atlas = device.create_texture(&wgpu::TextureDescriptor {
-            size: extent,
-            array_layer_count: 1,
-            mip_level_count: 1,
-            sample_count: 1,
-            dimension: wgpu::TextureDimension::D2,
-            format: wgpu::TextureFormat::Bgra8UnormSrgb,
-            usage: wgpu::TextureUsage::COPY_DST
-                | wgpu::TextureUsage::COPY_SRC
-                | wgpu::TextureUsage::SAMPLED,
-        });
-
+    pub fn new() -> Self {
         Self {
-            allocator: AtlasAllocator::new(Size::new(width as i32, height as i32)),
-            atlas,
             map: HashMap::new(),
             hits: HashSet::new(),
         }
@@ -100,15 +67,13 @@ impl Cache {
         self.get(handle).unwrap()
     }
 
-    pub fn atlas_size(&self) -> guillotiere::Size {
-        self.allocator.size()
-    }
-
     pub fn upload(
         &mut self,
         handle: &image::Handle,
         device: &wgpu::Device,
         encoder: &mut wgpu::CommandEncoder,
+        allocator: &mut AtlasAllocator,
+        atlas: &mut wgpu::Texture,
     ) -> &Memory {
         let _ = self.load(handle);
 
@@ -118,19 +83,19 @@ impl Cache {
             let (width, height) = image.dimensions();
             let size = Size::new(width as i32, height as i32);
 
-            let old_atlas_size = self.allocator.size();
+            let old_atlas_size = allocator.size();
             let allocation;
 
             loop {
-                if let Some(a) = self.allocator.allocate(size) {
+                if let Some(a) = allocator.allocate(size) {
                     allocation = a;
                     break;
                 }
 
-                self.allocator.grow(self.allocator.size() * 2);
+                allocator.grow(allocator.size() * 2);
             }
 
-            let new_atlas_size = self.allocator.size();
+            let new_atlas_size = allocator.size();
 
             if new_atlas_size != old_atlas_size {
                 let new_atlas = device.create_texture(&wgpu::TextureDescriptor {
@@ -151,7 +116,7 @@ impl Cache {
 
                 encoder.copy_texture_to_texture(
                     wgpu::TextureCopyView {
-                        texture: &self.atlas,
+                        texture: atlas,
                         array_layer: 0,
                         mip_level: 0,
                         origin: wgpu::Origin3d {
@@ -177,7 +142,7 @@ impl Cache {
                     }
                 );
 
-                self.atlas = new_atlas;
+                *atlas = new_atlas;
             }
 
             let extent = wgpu::Extent3d {
@@ -206,7 +171,7 @@ impl Cache {
                     image_height: height,
                 },
                 wgpu::TextureCopyView {
-                    texture: &self.atlas,
+                    texture: atlas,
                     array_layer: 0,
                     mip_level: 0,
                     origin: wgpu::Origin3d {
@@ -224,25 +189,13 @@ impl Cache {
         memory
     }
 
-    pub fn atlas(&self, device: &wgpu::Device, texture_layout: &wgpu::BindGroupLayout) -> wgpu::BindGroup {
-        device.create_bind_group(&wgpu::BindGroupDescriptor {
-            layout: texture_layout,
-            bindings: &[wgpu::Binding {
-                binding: 0,
-                resource: wgpu::BindingResource::TextureView(
-                    &self.atlas.create_default_view(),
-                ),
-            }],
-        })
-    }
-
-    pub fn trim(&mut self) {
+    pub fn trim(&mut self, allocator: &mut AtlasAllocator) {
         let hits = &self.hits;
 
         for (id, mem) in &mut self.map {
             if let Memory::Device(allocation) = mem {
                 if !hits.contains(&id) {
-                    self.allocator.deallocate(allocation.id);
+                    allocator.deallocate(allocation.id);
                 }
             }
         }
diff --git a/wgpu/src/image/vector.rs b/wgpu/src/image/vector.rs
index 1a9352f2..89477877 100644
--- a/wgpu/src/image/vector.rs
+++ b/wgpu/src/image/vector.rs
@@ -4,6 +4,7 @@ use std::{
     fmt,
 };
 use guillotiere::{Allocation, AtlasAllocator, Size};
+use debug_stub_derive::*;
 
 pub enum Svg {
     Loaded { tree: resvg::usvg::Tree },
@@ -29,57 +30,22 @@ impl fmt::Debug for Svg {
     }
 }
 
+#[derive(DebugStub)]
 pub struct Cache {
-    allocator: AtlasAllocator,
-    atlas: wgpu::Texture,
     svgs: HashMap<u64, Svg>,
+    #[debug_stub="ReplacementValue"]
     rasterized: HashMap<(u64, u32, u32), Allocation>,
     svg_hits: HashSet<u64>,
     rasterized_hits: HashSet<(u64, u32, u32)>,
 }
 
-impl fmt::Debug for Cache {
-    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt.debug_struct("Vector Cache")
-            .field("allocator", &String::from("AtlasAllocator"))
-            .field("atlas", &self.atlas)
-            .field("svgs", &self.svgs)
-            .field("rasterized", &String::from("HashMap<(u64, u32, u32), Allocation>"))
-            .field("svg_hits", &self.svg_hits)
-            .field("rasterized_hits", &self.rasterized_hits)
-            .finish()
-    }
-}
-
 impl Cache {
-    pub fn new(device: &wgpu::Device) -> Self {
-        let (width, height) = (512, 512);
-
-        let extent = wgpu::Extent3d {
-            width,
-            height,
-            depth: 1,
-        };
-
-        let atlas = device.create_texture(&wgpu::TextureDescriptor {
-            size: extent,
-            array_layer_count: 1,
-            mip_level_count: 1,
-            sample_count: 1,
-            dimension: wgpu::TextureDimension::D2,
-            format: wgpu::TextureFormat::Bgra8UnormSrgb,
-            usage: wgpu::TextureUsage::COPY_DST
-                | wgpu::TextureUsage::COPY_SRC
-                | wgpu::TextureUsage::SAMPLED,
-        });
-
+    pub fn new() -> Self {
         Self {
             svgs: HashMap::new(),
             rasterized: HashMap::new(),
             svg_hits: HashSet::new(),
             rasterized_hits: HashSet::new(),
-            allocator: AtlasAllocator::new(Size::new(width as i32, height as i32)),
-            atlas,
         }
     }
 
@@ -99,10 +65,6 @@ impl Cache {
         self.svgs.get(&handle.id()).unwrap()
     }
 
-    pub fn atlas_size(&self) -> guillotiere::Size {
-        self.allocator.size()
-    }
-
     pub fn upload(
         &mut self,
         handle: &svg::Handle,
@@ -110,6 +72,8 @@ impl Cache {
         scale: f32,
         device: &wgpu::Device,
         encoder: &mut wgpu::CommandEncoder,
+        allocator: &mut AtlasAllocator,
+        atlas: &mut wgpu::Texture,
     ) -> Option<&Allocation> {
         let id = handle.id();
 
@@ -138,19 +102,19 @@ impl Cache {
                 }
 
                 let size = Size::new(width as i32, height as i32);
-                let old_atlas_size = self.allocator.size();
+                let old_atlas_size = allocator.size();
                 let allocation;
 
                 loop {
-                    if let Some(a) = self.allocator.allocate(size) {
+                    if let Some(a) = allocator.allocate(size) {
                         allocation = a;
                         break;
                     }
 
-                    self.allocator.grow(self.allocator.size() * 2);
+                    allocator.grow(allocator.size() * 2);
                 }
 
-                let new_atlas_size = self.allocator.size();
+                let new_atlas_size = allocator.size();
 
                 if new_atlas_size != old_atlas_size {
                     let new_atlas = device.create_texture(&wgpu::TextureDescriptor {
@@ -171,7 +135,7 @@ impl Cache {
 
                     encoder.copy_texture_to_texture(
                         wgpu::TextureCopyView {
-                            texture: &self.atlas,
+                            texture: atlas,
                             array_layer: 0,
                             mip_level: 0,
                             origin: wgpu::Origin3d {
@@ -197,7 +161,7 @@ impl Cache {
                         }
                     );
 
-                    self.atlas = new_atlas;
+                    *atlas = new_atlas;
                 }
 
                 // TODO: Optimize!
@@ -238,7 +202,7 @@ impl Cache {
                         image_height: height as u32,
                     },
                     wgpu::TextureCopyView {
-                        texture: &self.atlas,
+                        texture: atlas,
                         array_layer: 0,
                         mip_level: 0,
                         origin: wgpu::Origin3d {
@@ -266,25 +230,13 @@ impl Cache {
         }
     }
 
-    pub fn atlas(&self, device: &wgpu::Device, texture_layout: &wgpu::BindGroupLayout) -> wgpu::BindGroup {
-        device.create_bind_group(&wgpu::BindGroupDescriptor {
-            layout: texture_layout,
-            bindings: &[wgpu::Binding {
-                binding: 0,
-                resource: wgpu::BindingResource::TextureView(
-                    &self.atlas.create_default_view(),
-                ),
-            }],
-        })
-    }
-
-    pub fn trim(&mut self) {
+    pub fn trim(&mut self, allocator: &mut AtlasAllocator) {
         let svg_hits = &self.svg_hits;
         let rasterized_hits = &self.rasterized_hits;
 
         for (k, alloc) in &mut self.rasterized {
             if !rasterized_hits.contains(&k) {
-                self.allocator.deallocate(alloc.id);
+                allocator.deallocate(alloc.id);
             }
         }