From eda8ad35f3aeef51975cd990c43128f96030beca Mon Sep 17 00:00:00 2001
From: BromBrom <190221485+brombrom-hani@users.noreply.github.com>
Date: Thu, 28 Aug 2025 22:32:53 +0200
Subject: [PATCH] fix: Y origin in prepare_chipmunk_shader

Convert surface_area from top-left pixels to bottom-left UVs so `bot_left`/`top_right` align with `tex_coord` and the clip box is correct.
---
 src/sprite.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/sprite.c b/src/sprite.c
index 7b28bde..52ef3da 100644
--- a/src/sprite.c
+++ b/src/sprite.c
@@ -109,8 +109,9 @@ static void prepare_chipmunk_shader(struct gfx_render_job *job, void *data)
 		r = (Rectangle) { 0, 0, sp->rect.w, sp->rect.h };
 	}
 
-	glUniform2f(s->bot_left, r.x, r.y);
-	glUniform2f(s->top_right, r.x + r.w, r.y + r.h);
+	int sy_bottom = sp->rect.h - (r.y + r.h);
+	glUniform2f(s->bot_left,  r.x, sy_bottom);
+	glUniform2f(s->top_right, r.x + r.w, sy_bottom + r.h);
 }
 
 void sprite_init_sact(void)