From 3bbe5ebcdb2a5aa6810dd05576c6ec031efdc1c7 Mon Sep 17 00:00:00 2001
From: Tengu712 <genreihoutengu@gmail.com>
Date: Wed, 7 Oct 2026 00:57:01 +0900
Subject: render image

---
 src/graphics.rs | 53 +++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 43 insertions(+), 10 deletions(-)

(limited to 'src/graphics.rs')

diff --git a/src/graphics.rs b/src/graphics.rs
index bab9f05..92defc2 100644
--- a/src/graphics.rs
+++ b/src/graphics.rs
@@ -1,25 +1,31 @@
-use glam::{Vec2, Vec4};
-use std::{borrow::Cow, mem, slice, sync::Arc};
+use glam::{Mat2, Vec2};
+use std::{borrow::Cow, mem, num::NonZeroU32, slice, sync::Arc};
 use wgpu::*;
 use winit::{dpi::PhysicalSize, event_loop::OwnedDisplayHandle, window::Window};
 
 pub mod command;
 mod font;
+pub mod image;
 mod texture;
 
 use command::RenderCommand;
 use font::CharAtlas;
+use image::ImageId;
+use texture::TextureWrapper;
 
 pub const INSTANCE_MAX_COUNT: u64 = 128;
+const IMAGE_SLOT_COUNT: u32 = 5;
 
 #[repr(C)]
 struct InstanceData {
+    // 拡縮・回転行列 NDCを考慮していること
+    transform: Mat2,
     // 中央原点 左→右[-1, 1] 下→上[-1, 1]
-    position: Vec2,
-    // 拡大率 (width, height): [0, 1]^2
-    scale: Vec2,
-    // (u, v, width, height): [0, 1]^4
-    uv: Vec4,
+    translation: Vec2,
+    uv_offset: Vec2,
+    uv_size: Vec2,
+    tex_id: u32,
+    _pad: u32,
 }
 
 pub enum AcquireSurfaceTextureResult {
@@ -40,6 +46,7 @@ pub struct Renderer {
     instances: Buffer,
     trans_bind_group: BindGroup,
     char_atlas: CharAtlas,
+    images: Vec<TextureWrapper>,
     fixed_bind_group: BindGroup,
 }
 
@@ -61,7 +68,15 @@ impl Renderer {
             .await
             .map_err(|e| e.to_string())?;
         let (device, queue) = adapter
-            .request_device(&DeviceDescriptor::default())
+            .request_device(&DeviceDescriptor {
+                required_features: Features::TEXTURE_BINDING_ARRAY
+                    | Features::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING,
+                required_limits: Limits {
+                    max_binding_array_elements_per_shader_stage: IMAGE_SLOT_COUNT,
+                    ..Default::default()
+                },
+                ..Default::default()
+            })
             .await
             .map_err(|e| e.to_string())?;
 
@@ -110,6 +125,16 @@ impl Renderer {
                     },
                     count: None,
                 },
+                BindGroupLayoutEntry {
+                    binding: 2,
+                    visibility: ShaderStages::FRAGMENT,
+                    ty: BindingType::Texture {
+                        sample_type: TextureSampleType::Float { filterable: true },
+                        view_dimension: TextureViewDimension::D2,
+                        multisampled: false,
+                    },
+                    count: NonZeroU32::new(IMAGE_SLOT_COUNT),
+                },
             ],
         });
         let pipeline_layout = device.create_pipeline_layout(&PipelineLayoutDescriptor {
@@ -183,6 +208,8 @@ impl Renderer {
         });
         // NOTE: 文字テクスチャアトラスは使い回すので、ここで1個だけ作成すれば良い。
         let char_atlas = CharAtlas::new(scale_factor, &device);
+        // NOTE: 画像テクスチャ配列は使いまわすので、ここで1個だけ作成すればいい。
+        let images = image::create_textures(&device, &queue);
         let fixed_bind_group = device.create_bind_group(&BindGroupDescriptor {
             label: None,
             layout: &fixed_bind_group_layout,
@@ -195,6 +222,12 @@ impl Renderer {
                     binding: 1,
                     resource: BindingResource::TextureView(&char_atlas.texture.view),
                 },
+                BindGroupEntry {
+                    binding: 2,
+                    resource: BindingResource::TextureViewArray(
+                        &[&images[ImageId::Image as usize].view; IMAGE_SLOT_COUNT as usize],
+                    ),
+                },
             ],
         });
 
@@ -209,6 +242,7 @@ impl Renderer {
             instances,
             trans_bind_group,
             char_atlas,
+            images,
             fixed_bind_group,
         };
 
@@ -282,10 +316,9 @@ impl Renderer {
                 window.scale_factor() as f32,
                 &self.queue,
                 &mut self.char_atlas,
+                &self.images,
                 &mut instances,
             );
-            // TODO: 今はfont_texしか使わないので1ドローコールで済むが、
-            //       bind groupを変える必要があればドローコールを切る。
         }
         instances.truncate(INSTANCE_MAX_COUNT as usize);
         let bytes = unsafe {
-- 
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