working through the pipeline I have going on for the text stuff

src/canvas/canvas_buffer.rs

@@ -51,3 +51,18 @@ impl CanvasImage {
     }
 }
 
+#[derive(Clone)]
+pub struct CanvasText {
+}
+
+impl CanvasText {
+    pub fn get_descriptor_set(pipeline: Arc<dyn GraphicsPipelineAbstract + Sync + Send>)
+                              -> Box<dyn DescriptorSet + Send + Sync> {
+        let o: Box<dyn DescriptorSet + Send + Sync> = Box::new(
+            PersistentDescriptorSet::start(
+                pipeline.clone(), 0,
+            )
+                .build().unwrap());
+        o
+    }
+}

src/canvas/canvas_state.rs

@@ -20,9 +20,8 @@ use vulkano::pipeline::viewport::Viewport;
 use vulkano::descriptor::descriptor::DescriptorDescTy::TexelBuffer;
 use crate::canvas::canvas_frame::CanvasFrame;
 use std::hash::Hash;
-use crate::canvas::canvas_text::{CanvasText, CanvasFontHandle};
-
-use crate::canvas::canvas_buffer::{CanvasImage, CanvasTexture, CanvasTextCache};
+use crate::canvas::canvas_text::{CanvasFont, CanvasFontHandle};
+use crate::canvas::canvas_buffer::{CanvasImage, CanvasTexture, CanvasText};
 use crate::util::vertex_3d::Vertex3D;
 use vulkano::pipeline::depth_stencil::{StencilFaceFlags, DynamicStencilValue};
 use crate::canvas::shader::common::{CompiledGraphicsPipeline, CompiledGraphicsPipelineHandle};
@@ -30,6 +29,7 @@ use crate::canvas::shader::generic_shader::GenericShader;
 use vulkano::memory::pool::PotentialDedicatedAllocation::Generic;
 use rusttype::Glyph;
 use std::borrow::Borrow;
+use crate::canvas::shader::text_shader::GlyphInstance;
 
 /// 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
@@ -82,21 +82,18 @@ pub struct CanvasState {
     texture_buffers: Vec<Arc<CanvasTexture>>,
     shader_buffers: Vec<Arc<Box<dyn CompiledGraphicsPipeline>>>,
 
-    //
-    text_buffers: Vec<Arc<CanvasText>>,
+    // Individually hold onto the Fonts
+    font_buffers: Vec<Arc<CanvasFont>>,
 
     // Hold onto the vertices we get from the Compu and Canvas Frames
     // When the run comes around, push the vertices to the GPU
-    colored_vertex_buffer: Vec<Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
+    colored_vertex_buffer: Vec<Arc<(dyn BufferAccess + Send + Sync)>>,
 
-    textured_vertex_buffer: HashMap<Arc<CanvasTextureHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
+    textured_vertex_buffer: HashMap<Arc<CanvasTextureHandle>, Arc<(dyn BufferAccess + Send + Sync)>>,
 
-    image_vertex_buffer: HashMap<Arc<CanvasImageHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
+    image_vertex_buffer: HashMap<Arc<CanvasImageHandle>, Arc<(dyn BufferAccess + Send + Sync)>>,
 
-    // So what exactly is this going to hold?
-    // Its going to be untextured. Colored. Lists of vertices.
-    text_instances: HashMap<Arc<CanvasFontHandle>, Vec<(Vertex3D, )>>,
-    text_atlas_buffer: HashMap<Arc<CanvasFontHandle>, Arc<(dyn BufferAccess + std::marker::Send + std::marker::Sync)>>,
+    text_instances: HashMap<Arc<CanvasFontHandle>, Arc<(dyn BufferAccess + Send + Sync)>>,
 
     // Looks like we gotta hold onto the queue for managing textures
     queue: Arc<Queue>,
@@ -203,16 +200,12 @@ impl CanvasState {
             image_buffers: vec![],
             texture_buffers: vec![],
             shader_buffers: vec![],
-            text_buffers: vec![],
+            font_buffers: vec![],
 
-            colored_drawables: vec![],
             colored_vertex_buffer: vec![],
-            textured_drawables: HashMap::default(),
             textured_vertex_buffer: Default::default(),
-            image_drawables: Default::default(),
             image_vertex_buffer: Default::default(),
             text_instances: HashMap::default(),
-            text_atlas_buffer: Default::default(),
 
             queue: queue.clone(),
             device: device.clone(),
@@ -222,7 +215,7 @@ impl CanvasState {
 
     /// Using the dimensions and suggested usage, load a CanvasImage and return it's handle
     pub fn create_text_buffers(&mut self, dimensions: (u32, u32)) -> Arc<CanvasFontHandle> {
-        let handle = Arc::new(CanvasFontHandle { handle: self.text_buffers.len() as u32 });
+        let handle = Arc::new(CanvasFontHandle { handle: self.font_buffers.len() as u32 });
 //
 //        let text = CanvasText {
 //            handle: handle.clone(),
@@ -403,10 +396,14 @@ impl CanvasState {
 
     /// Scrape all the values from the CanvasFrame and then allocate the vertex buffers
     pub fn draw(&mut self, canvas_frame: CanvasFrame) {
-        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;
+
+        // Consume the canvas frame
+        let mut textured_drawables = canvas_frame.textured_drawables;
+        let mut colored_drawables = canvas_frame.colored_drawables;
+        let mut image_drawables = canvas_frame.image_drawables;
+        let mut text_drawables = canvas_frame.text_drawables;
+
+        // Walk through the consumed items and allocate them to GPU buffers
 
         self.colored_vertex_buffer.clear();
         {
@@ -423,7 +420,7 @@ impl CanvasState {
         self.textured_vertex_buffer.clear();
         {
             let g = hprof::enter("Textured Vertex Buffer");
-            for (k, v) in self.textured_drawables.drain() {
+            for (k, v) in textured_drawables.drain() {
                 let vertex_buffer = v.clone().iter()
                     .fold(Vec::new(), |mut a: Vec<Vertex3D>, b| {
                         a.extend(b);
@@ -444,7 +441,7 @@ impl CanvasState {
         self.image_vertex_buffer.clear();
         {
             let g = hprof::enter("Image Vertex Buffer");
-            for (k, v) in self.image_drawables.drain() {
+            for (k, v) in image_drawables.drain() {
                 let vertex_buffer = v.clone().iter()
                     .fold(Vec::new(), |mut a: Vec<Vertex3D>, b| {
                         a.extend(b);
@@ -465,18 +462,12 @@ 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(
+            for (k, v) in text_drawables.drain() {
+                self.text_instances.insert(
                     k.clone(),
                     ImmutableBuffer::from_iter(
-                        vertex_buffer.iter().cloned(),
-                        BufferUsage::vertex_buffer(),
+                        v.iter().cloned(),
+                        BufferUsage::all(),
                         self.queue.clone(),
                     ).unwrap().0,
                 );
@@ -580,27 +571,24 @@ impl CanvasState {
         }
 
         // Text
-        let mut shader = self.text_buffers.get(
+        let mut shader = self.shader_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();
+        if !self.text_instances.is_empty() {
+            for (font_handle, instance_buffer) in self.text_instances.clone() {
+                let handle = font_handle.clone().handle as usize;
+                let font = self.font_buffers.get(handle).clone().unwrap().clone();
+                let descriptor_set = CanvasText::get_descriptor_set(shader.get_pipeline());
 
                 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], (),
+                    vec![font.get_vertex_buffer().clone(), instance_buffer.clone()],
+                    (), (),
                 ).unwrap();
             }
         }

src/canvas/canvas_text.rs

@@ -1,5 +1,5 @@
 use vulkano::descriptor::descriptor_set::PersistentDescriptorSet;
-use rusttype::{Font, PositionedGlyph, Scale, Rect, point};
+use rusttype::{Font, PositionedGlyph, Scale, Rect, point, GlyphId};
 use rusttype::gpu_cache::Cache;
 use vulkano::buffer::{BufferAccess, BufferUsage, ImmutableBuffer, CpuAccessibleBuffer};
 use vulkano::device::{Device, Queue};
@@ -8,6 +8,10 @@ use vulkano::command_buffer::{AutoCommandBufferBuilder, DynamicState};
 use vulkano::image::{ImmutableImage, ImageUsage, ImageLayout, Dimensions};
 use vulkano::format::ClearValue;
 use vulkano::format::Format::R8Unorm;
+use std::fs::File;
+use std::io::Read;
+use crate::canvas::shader::text_shader::GlyphInstance;
+use crate::util::vertex_3d::{Vertex3D, TextVertex3D};
 
 
 /*
@@ -30,9 +34,7 @@ that can come when I look at caching the sprites
 
 */
 
-pub struct Glyph {
-
-}
+pub struct Glyph {}
 
 /// Typed wrapper for a u32 shader handle (index id)
 #[derive(Clone, Debug, Default, PartialEq, Eq, Hash)]
@@ -42,34 +44,58 @@ pub struct CanvasFontHandle {
 
 /// So currently, I'm using these as container classes which vkprocessor owns
 /// I then use a CanvasFrame which accumulates lists of handles and vertices.
-pub struct CanvasText {
-    device:             Arc<Device>,
-    queue:              Arc<Queue>,
+pub struct CanvasFont {
     font: Font<'static>,
+    font_name: String,
+    allocated_font_atlas: Arc<(dyn BufferAccess + Send + Sync)>,
 }
 
-impl CanvasText {
+impl CanvasFont {
 
-    /// Load the font
-    pub fn new(device: Arc<Device>, queue: Arc<Queue>) -> CanvasText {
+    fn parse_to_vertex_buffer(font: Font) -> Vec<TextVertex3D> {
+
+        let mut current_x = 0;
+        let mut current_y = 0;
+
+        let mut accumulator = Vec::new();
+
+        for i in (0..255) {
+
+            let glyph = font.glyph(GlyphId{ 0: 40 });
 
-        let font_data = include_bytes!("../../resources/fonts/sansation.ttf");
-        let font = Font::from_bytes(font_data as &[u8]).unwrap();
+            let glyph_data = glyph.get_data().unwrap();
 
-        CanvasText {
-            device: device.clone(),
-            queue: queue.clone(),
-            font: font,
+            for vertex in glyph_data.clone().shape.clone().unwrap() {
+                accumulator.push(TextVertex3D {
+                    position: [vertex.x as f32, vertex.y as f32, 0.0],
+                });
             }
         }
 
-    /// Generate a vertex buffer from the font
-    /*
-        So... These fonts are going to have unequal amounts of vertices.
+        accumulator
+    }
+    /// Load the font
+    pub fn new(device: Arc<Device>, queue: Arc<Queue>, font_name: String) -> CanvasFont {
+
+        let font = Font::from_bytes({
+            let mut f = File::open("resources/fonts/sansation.ttf").expect("Font file not found");
+            let mut font_data = Vec::new();
+            f.read_to_end(&mut font_data).expect("Dont know");
+            font_data
+        }).unwrap();
+
+        CanvasFont {
+            font: font.clone(),
+            font_name: font_name,
+            allocated_font_atlas: ImmutableBuffer::from_iter(
+                CanvasFont::parse_to_vertex_buffer(font.clone()).iter().cloned(),
+                BufferUsage::vertex_buffer(), queue).unwrap().0,
+        }
+    }
 
-    */
-    pub fn get_vertex_buffer(&self) {
-        unimplemented!()
+    /// Generate a vertex buffer from the font
+    pub fn get_vertex_buffer(&self) -> Arc<(dyn BufferAccess + Send + Sync)> {
+        return self.allocated_font_atlas.clone();
     }
 
     /// postpone this until caching
@@ -89,7 +115,7 @@ impl CanvasText {
 
     pub fn draw_text(&mut self,
                      command_buffer: AutoCommandBufferBuilder,
-                     image_num: usize
+                     image_num: usize,
     ) -> AutoCommandBufferBuilder {
 
 //        let screen_width = 0;
@@ -208,5 +234,4 @@ impl CanvasText {
 
         command_buffer//.end_render_pass().unwrap()
     }
-
 }

src/util/vertex_3d.rs

@@ -9,3 +9,11 @@ pub struct Vertex3D {
 
 vulkano::impl_vertex!(Vertex3D, v_position, color, ti_position);
 
+/// Text vertex 3d with vertex position
+#[derive(Default, Debug, Clone, Copy)]
+pub struct TextVertex3D {
+    pub position: [f32; 3],
+}
+
+vulkano::impl_vertex!(TextVertex3D, position);
+