From a85380fb71e4e9b312eef2a0dc119d8a98b0570c Mon Sep 17 00:00:00 2001
From: codegirl-007 <s.raide@gmail.com>
Date: Sat, 1 Aug 2026 23:25:17 -0700
Subject: [PATCH 1/2] sprite batching

---
 engine/app.odin         | 28 ++++++++++++++++++++++++----
 examples/toad/main.odin |  4 ++++
 2 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/engine/app.odin b/engine/app.odin
index 2e6fa31..424c83e 100644
--- a/engine/app.odin
+++ b/engine/app.odin
@@ -270,9 +270,13 @@ end_frame :: proc(app: ^App) {
 	app.render_pass = sdl.BeginGPURenderPass(cmd, &color_info, 1, nil)
 	sdl.BindGPUGraphicsPipeline(app.render_pass, app.pipeline)
 
-	for q, i in app.draw_list {
+	i := 0
+	for i < n {
+		run := texture_run_len(app.draw_list[:], i)
+		q0 := app.draw_list[i]
+
 		sampler_binding := sdl.GPUTextureSamplerBinding {
-			texture = q.texture,
+			texture = q0.texture,
 			sampler = app.sampler,
 		}
 		sdl.BindGPUFragmentSamplers(app.render_pass, 0, &sampler_binding, 1)
@@ -282,9 +286,11 @@ end_frame :: proc(app: ^App) {
 			offset = u32(i * SPRITE_VERTS_SIZE),
 		}
 		sdl.BindGPUVertexBuffers(app.render_pass, 0, &vb_binding, 1)
-		sdl.DrawGPUPrimitives(app.render_pass, SPRITE_VERT_COUNT, 1, 0, 0)
-	}
 
+		sdl.DrawGPUPrimitives(app.render_pass, u32(run * SPRITE_VERT_COUNT), 1, 0, 0)
+
+		i += run
+	}
 	sdl.EndGPURenderPass(app.render_pass)
 	app.render_pass = nil
 
@@ -418,3 +424,17 @@ create_sprite_pipeline :: proc(app: ^App) -> ^sdl.GPUGraphicsPipeline {
 
 	return pipeline
 }
+
+texture_run_len :: proc(list: []Queued_Sprite, start: int) -> int {
+	if start < 0 || start >= len(list) do return 0
+
+	tex := list[start].texture
+	n := 1
+
+	for i in start + 1 ..< len(list) {
+		if list[i].texture != tex do break
+		n += 1
+	}
+
+	return n
+}
diff --git a/examples/toad/main.odin b/examples/toad/main.odin
index ba68abe..de02712 100644
--- a/examples/toad/main.odin
+++ b/examples/toad/main.odin
@@ -13,6 +13,8 @@ main :: proc() {
 	defer eng.destroy_character_data(&app, &data)
 
 	toad := eng.spawn_sprite(&data, {400, 500}, "idle", 0)
+	toad1 := eng.spawn_sprite(&data, {250, 500}, "idle", 0)
+	toad2 := eng.spawn_sprite(&data, {550, 500}, "idle", 0)
 
 	last := eng.now_seconds()
 	SPEED :: f32(200)
@@ -43,6 +45,8 @@ main :: proc() {
 
 		eng.begin_frame(&app)
 		eng.draw_sprite(&app, &toad)
+		eng.draw_sprite(&app, &toad1)
+		eng.draw_sprite(&app, &toad2)
 		eng.end_frame(&app)
 	}
 }

From c1f3d0e61b1de3922c4b672195448995e52d513d Mon Sep 17 00:00:00 2001
From: codegirl-007 <s.raide@gmail.com>
Date: Sat, 1 Aug 2026 23:27:08 -0700
Subject: [PATCH 2/2] revert example testing

---
 examples/toad/main.odin | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/examples/toad/main.odin b/examples/toad/main.odin
index de02712..ba68abe 100644
--- a/examples/toad/main.odin
+++ b/examples/toad/main.odin
@@ -13,8 +13,6 @@ main :: proc() {
 	defer eng.destroy_character_data(&app, &data)
 
 	toad := eng.spawn_sprite(&data, {400, 500}, "idle", 0)
-	toad1 := eng.spawn_sprite(&data, {250, 500}, "idle", 0)
-	toad2 := eng.spawn_sprite(&data, {550, 500}, "idle", 0)
 
 	last := eng.now_seconds()
 	SPEED :: f32(200)
@@ -45,8 +43,6 @@ main :: proc() {
 
 		eng.begin_frame(&app)
 		eng.draw_sprite(&app, &toad)
-		eng.draw_sprite(&app, &toad1)
-		eng.draw_sprite(&app, &toad2)
 		eng.end_frame(&app)
 	}
 }