From 616465b6321e38b6ece408ec4c9e3872e405f531 Mon Sep 17 00:00:00 2001
From: Andre Weissflog <floooh@gmail.com>
Date: Mon, 3 Jul 2023 19:23:42 +0200
Subject: [PATCH] use textureSize() in shadows-sapp.glsl instead passing from
 cpu side

---
 sapp/shadows-sapp.c    | 1 -
 sapp/shadows-sapp.glsl | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/sapp/shadows-sapp.c b/sapp/shadows-sapp.c
index 7f0b7836..dcedf735 100644
--- a/sapp/shadows-sapp.c
+++ b/sapp/shadows-sapp.c
@@ -277,7 +277,6 @@ void frame(void) {
     const fs_display_params_t fs_display_params = {
         .light_dir = HMM_NormalizeVec3(light_pos.XYZ),
         .eye_pos = eye_pos,
-        .sm_size = HMM_Vec2(2048.0f, 2048.0f),
     };
 
     const vs_display_params_t plane_vs_display_params = {
diff --git a/sapp/shadows-sapp.glsl b/sapp/shadows-sapp.glsl
index 96130e58..01eeafbe 100644
--- a/sapp/shadows-sapp.glsl
+++ b/sapp/shadows-sapp.glsl
@@ -105,7 +105,6 @@ void main() {
 uniform fs_display_params {
     vec3 light_dir;
     vec3 eye_pos;
-    vec2 sm_size;
 };
 
 uniform texture2D shadow_map;
@@ -124,6 +123,7 @@ vec4 gamma(vec4 c) {
 }
 
 void main() {
+    vec2 sm_size = textureSize(sampler2D(shadow_map, shadow_sampler), 0);
     float spec_power = 2.2;
     float ambient_intensity = 0.25;
     vec3 l = normalize(light_dir);