getting the canvasframe set up for text

resources/shaders/simple_text.vert

@@ -7,6 +7,11 @@ layout(location = 0) in vec3 v_position;
 layout(location = 1) in vec4 color;
 layout(location = 2) in vec2 ti_position;
 
+layout(location = 3) in vec2 screen_position;
+layout(location = 4) in vec2 atlas_position;
+layout(location = 5) in vec2 atlas_size;
+layout(location = 6 in float scale;
+
 // These are made up in the shader themselves
 layout(location = 0) out vec2 tex_coords;
 

src/canvas/canvas_buffer.rs

@@ -51,45 +51,3 @@ impl CanvasImage {
     }
 }
 
-#[derive(Clone)]
-pub struct CanvasTextCache {
-    //pub(crate) handle: Arc<CanvasTextCacheHandle>,
-    pub(crate) buffer: Arc<CpuAccessibleBuffer<u8>>,
-    pub(crate) size: (u32, u32),
-}
-
-impl CanvasTextCache {
-    pub fn get_descriptor_set(&self,
-                              pipeline: Arc<dyn GraphicsPipelineAbstract + Sync + Send>,
-                              sampler: Arc<Sampler>) -> Box<dyn DescriptorSet + Send + Sync> {
-        let o: Box<dyn DescriptorSet + Send + Sync> = Box::new(
-            PersistentDescriptorSet::start(
-                pipeline.clone(), 0,
-            )
-                .add_buffer(self.buffer.clone()).unwrap()
-                .build().unwrap());
-        o
-    }
-}
-
-
-#[derive(Clone)]
-pub struct CanvasText {
-    pub(crate) handle: Arc<CanvasFontHandle>,
-    pub(crate) buffer: Arc<ImmutableImage<R8Unorm>>,
-    pub(crate) size: (u32, u32),
-}
-
-impl CanvasText {
-    pub fn get_descriptor_set(&self,
-                              pipeline: Arc<dyn GraphicsPipelineAbstract + Sync + Send>,
-                              sampler: Arc<Sampler>) -> Box<dyn DescriptorSet + Send + Sync> {
-        let o: Box<dyn DescriptorSet + Send + Sync> = Box::new(
-            PersistentDescriptorSet::start(
-                pipeline.clone(), 0,
-            )
-                .add_sampled_image(self.buffer.clone(), sampler.clone()).unwrap()
-                .build().unwrap());
-        o
-    }
-}

src/canvas/canvas_frame.rs

@@ -2,12 +2,15 @@ use crate::util::vertex_3d::{Vertex3D};
 use std::sync::Arc;
 use std::collections::HashMap;
 use crate::canvas::canvas_state::{Drawable, CanvasTextureHandle, CanvasImageHandle};
+use crate::canvas::canvas_text::CanvasFontHandle;
+use crate::canvas::shader::text_shader::GlyphInstance;
 
 ///
 pub struct CanvasFrame {
     pub colored_drawables: Vec<Vertex3D>,
     pub textured_drawables: HashMap<Arc<CanvasTextureHandle>, Vec<Vec<Vertex3D>>>,
     pub image_drawables: HashMap<Arc<CanvasImageHandle>, Vec<Vec<Vertex3D>>>,
+    pub text_drawables: HashMap<Arc<CanvasFontHandle>, Vec<GlyphInstance>>
 }
 
 impl CanvasFrame {
@@ -18,9 +21,12 @@ impl CanvasFrame {
             colored_drawables: vec![],
             textured_drawables: Default::default(),
             image_drawables: Default::default(),
+            text_drawables: Default::default()
         }
     }
 
+
+    // TODO: Fix this for text and fonts
     /// Accumulates the drawables collected Vertex2D's
     pub fn draw(&mut self, drawable: &dyn Drawable) {
         match drawable.get_texture_handle() {

src/canvas/canvas_state.rs

@@ -29,6 +29,7 @@ use crate::canvas::shader::common::{CompiledGraphicsPipeline, CompiledGraphicsPi
 use crate::canvas::shader::generic_shader::GenericShader;
 use vulkano::memory::pool::PotentialDedicatedAllocation::Generic;
 use rusttype::Glyph;
+use std::borrow::Borrow;
 
 /// A drawable object can be passed into a CanvasFrame to be rendered
 /// Very generic implementation. (N % 2 == 0) vertices, ditto for texture coords, and rgba color
@@ -80,23 +81,22 @@ pub struct CanvasState {
     image_buffers: Vec<Arc<CanvasImage>>,
     texture_buffers: Vec<Arc<CanvasTexture>>,
     shader_buffers: Vec<Arc<Box<dyn CompiledGraphicsPipeline>>>,
-    text_buffers: Vec<Arc<(CanvasText, CanvasTextCache)>>,
+
+    //
+    text_buffers: Vec<Arc<CanvasText>>,
 
     // Hold onto the vertices we get from the Compu and Canvas Frames
     // When the run comes around, push the vertices to the GPU
-    colored_drawables: Vec<Vertex3D>,
     colored_vertex_buffer: Vec<Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
 
-    textured_drawables: HashMap<Arc<CanvasTextureHandle>, Vec<Vec<Vertex3D>>>,
     textured_vertex_buffer: HashMap<Arc<CanvasTextureHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
 
-    image_drawables: HashMap<Arc<CanvasImageHandle>, Vec<Vec<Vertex3D>>>,
     image_vertex_buffer: HashMap<Arc<CanvasImageHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
 
     // So what exactly is this going to hold?
     // Its going to be untextured. Colored. Lists of vertices.
-    text_drawables: HashMap<Arc<CanvasFontHandle>, Vec<(Vertex3D)>>,
-    text_vertex_buffer: HashMap<Arc<CanvasFontHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
+    text_instances: HashMap<Arc<CanvasFontHandle>, Vec<(Vertex3D, )>>,
+    text_atlas_buffer: HashMap<Arc<CanvasFontHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
 
     // Looks like we gotta hold onto the queue for managing textures
     queue: Arc<Queue>,
@@ -211,8 +211,8 @@ impl CanvasState {
             textured_vertex_buffer: Default::default(),
             image_drawables: Default::default(),
             image_vertex_buffer: Default::default(),
-            text_drawables: HashMap::default(),
-            text_vertex_buffer: Default::default(),
+            text_instances: HashMap::default(),
+            text_atlas_buffer: Default::default(),
 
             queue: queue.clone(),
             device: device.clone(),
@@ -257,7 +257,6 @@ impl CanvasState {
         handle
     }
 
-
     /// Using the dimensions and suggested usage, load a CanvasImage and return it's handle
     pub fn create_image(&mut self, dimensions: (u32, u32), usage: ImageUsage) -> Arc<CanvasImageHandle> {
         let handle = Arc::new(CanvasImageHandle { handle: self.image_buffers.len() as u32 });
@@ -404,22 +403,17 @@ impl CanvasState {
 
     /// Scrape all the values from the CanvasFrame and then allocate the vertex buffers
     pub fn draw(&mut self, canvas_frame: CanvasFrame) {
-        self.textured_drawables = canvas_frame.textured_drawables;
-        self.colored_drawables = canvas_frame.colored_drawables;
-        self.image_drawables = canvas_frame.image_drawables;
+        let textured_drawables = canvas_frame.textured_drawables;
+        let colored_drawables = canvas_frame.colored_drawables;
+        let image_drawables = canvas_frame.image_drawables;
+        let text_drawables = canvas_frame.text_drawables;
 
-        self.allocate_vertex_buffers();
-    }
-
-    /// draw(canvas_fame) stored all the intermediate information, this function
-    /// allocates the vertex buffers using that information
-    fn allocate_vertex_buffers(&mut self) {
         self.colored_vertex_buffer.clear();
         {
             let g = hprof::enter("Colored Vertex Buffer");
             self.colored_vertex_buffer.push(
                 ImmutableBuffer::from_iter(
-                    self.colored_drawables.iter().cloned(),
+                    colored_drawables.iter().cloned(),
                     BufferUsage::vertex_buffer(),
                     self.queue.clone(),
                 ).unwrap().0
@@ -467,6 +461,27 @@ impl CanvasState {
                 );
             }
         }
+
+        self.text_instances.clear();
+        {
+            let g = hprof::enter("Text Instance Vertex Buffer");
+            for (k, v) in self.text_.drain() {
+                let vertex_buffer = v.clone().iter()
+                    .fold(Vec::new(), |mut a: Vec<Vertex3D>, b| {
+                        a.extend(b);
+                        a
+                    });
+
+                self.image_vertex_buffer.insert(
+                    k.clone(),
+                    ImmutableBuffer::from_iter(
+                        vertex_buffer.iter().cloned(),
+                        BufferUsage::vertex_buffer(),
+                        self.queue.clone(),
+                    ).unwrap().0,
+                );
+            }
+        }
     }
 
     /// Builds the descriptor set for solid colors using the input kernel (needs to support solid colors)
@@ -565,25 +580,30 @@ impl CanvasState {
         }
 
         // Text
-//        let mut shader = self.text_buffers.get(
-//            self.get_shader_handle(String::from("simple_text"))
-//                .unwrap().clone().handle as usize
-//        ).unwrap();
-
-//        if !self.text_vertex_buffer.is_empty() {
-//            for (text_handle, vertex_buffer) in self.text_vertex_buffer.clone() {
-//                let handle = text_handle.clone().handle as usize;
-//                let descriptor_set = self.text_buffers.get(handle).clone().unwrap().clone()
-//                    .get_descriptor_set(shader.get_pipeline(), self.sampler.clone());
-//
-//                command_buffer = command_buffer.draw(
-//                    shader.get_pipeline().clone(),
-//                    // Multiple vertex buffers must have their definition in the pipeline!
-//                    &self.dynamic_state.clone(), vec![vertex_buffer],
-//                    vec![descriptor_set], (),
-//                ).unwrap();
-//            }
-//        }
+        let mut shader = self.text_buffers.get(
+            self.get_shader_handle(String::from("simple_text"))
+                .unwrap().clone().handle as usize
+        ).unwrap();
+
+
+        //
+
+        if !self.text_atlas_buffer.is_empty() {
+            for (text_handle, vertex_buffer) in self.text_atlas_buffer.clone() {
+                let handle = text_handle.clone().handle as usize;
+                let descriptor_set = self.text_buffers.get(handle).clone().unwrap().clone()
+                    .get_descriptor_set(shader.get_pipeline(), self.sampler.clone());
+                let instance_data = self.text_instances.get(text_handle.borrow()).unwrap();
+
+                command_buffer = command_buffer.draw(
+                    shader.get_pipeline().clone(),
+                    // Multiple vertex buffers must have their definition in the pipeline!
+                    &self.dynamic_state.clone(),
+                    (vec![vertex_buffer],vec![]),
+                    vec![descriptor_set], (),
+                ).unwrap();
+            }
+        }
 
         command_buffer
             .end_render_pass()

src/canvas/shader/text_shader.rs

@@ -11,11 +11,20 @@ use shade_runner::{Input, Output, Layout, Entry};
 use std::ffi::CStr;
 use std::marker::PhantomData;
 use vulkano::pipeline::depth_stencil::{DepthStencil, Compare, DepthBounds, Stencil, StencilOp};
-use vulkano::pipeline::vertex::SingleBufferDefinition;
+use vulkano::pipeline::vertex::{SingleBufferDefinition, OneVertexOneInstanceDefinition};
 use crate::util::vertex_3d::Vertex3D;
 use crate::canvas::shader::generic_shader::GenericShader;
 use shade_runner as sr;
 
+#[derive(Default, Debug, Clone, Copy)]
+pub struct GlyphInstance {
+    screen_position: (f32, f32),
+    atlas_position: (f32, f32),
+    atlas_size: (f32, f32),
+    scale: f32,
+}
+vulkano::impl_vertex!(GlyphInstance, screen_position, atlas_position, atlas_size, scale);
+
 /// CanvasShader holds the pipeline and render pass for the input shader source
 #[derive(Clone)]
 pub struct TextShader {
@@ -99,7 +108,7 @@ impl CompiledGraphicsPipeline for TextShader {
             graphics_pipeline:
             Some(Arc::new(GraphicsPipeline::start()
 
-                .vertex_input(SingleBufferDefinition::<Vertex3D>::new())
+                .vertex_input(OneVertexOneInstanceDefinition::<Vertex3D, GlyphInstance>::new())
 
                 .vertex_shader(vertex_entry_point.clone(), ShaderSpecializationConstants {
                     first_constant: 0,