From 687e42ddfdc8c0dac2664a22af69073853a0182c Mon Sep 17 00:00:00 2001
From: veclavtalica <veclavtalica@poto.cafe>
Date: Sat, 27 Jul 2024 15:44:34 +0300
Subject: [PATCH] rendering.c: sprite texture flipping

---
 src/rendering/sprites.h | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/rendering/sprites.h b/src/rendering/sprites.h
index 0cfef9a..3995fb1 100644
--- a/src/rendering/sprites.h
+++ b/src/rendering/sprites.h
@@ -99,7 +99,6 @@ static struct sprite_batch {
 }
 
 
-/* TODO: texture flipping */
 /* assumes that orthogonal matrix setup is done already */
 static void render_sprites(const struct primitive_2d primitives[],
                            const size_t len,
@@ -142,32 +141,32 @@ static void render_sprites(const struct primitive_2d primitives[],
                     sprite.rect.x,
                     sprite.rect.y },
                 .uv0 = {
-                    xr,
-                    yr, },
+                    xr + wr * sprite.flip_x,
+                    yr + hr * sprite.flip_y, },
 
                 /* bottom-left */
                 .v1 = {
                     (sprite.rect.x),
                     (sprite.rect.y + sprite.rect.h) },
                 .uv1 = {
-                    xr,
-                    yr + hr, },
+                    xr + wr * sprite.flip_x,
+                    yr + hr * !sprite.flip_y, },
 
                 /* bottom-right */
                 .v2 = {
                     (sprite.rect.x + sprite.rect.w),
                     (sprite.rect.y + sprite.rect.h) },
                 .uv2 = {
-                    xr + wr,
-                    yr + hr, },
+                    xr + wr * !sprite.flip_x,
+                    yr + hr * !sprite.flip_y, },
 
                 /* upper-right */
                 .v3 = {
                     (sprite.rect.x + sprite.rect.w),
                     (sprite.rect.y) },
                 .uv3 = {
-                    xr + wr,
-                    yr, },
+                    xr + wr * !sprite.flip_x,
+                    yr + hr * sprite.flip_y, },
 
                 /* equal for all (flat shaded) */
                 .c0 = sprite.color,