From 33d5f67044d104d69cb2d11e78e6a79bc20d4c4e Mon Sep 17 00:00:00 2001
From: pryazha <pryadeiniv@mail.ru>
Date: Wed, 23 Jul 2025 20:55:29 +0500
Subject: some prb examples

---
 pbr/2.1.1.ibl_irradiance_conversion/hdr.frag | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 pbr/2.1.1.ibl_irradiance_conversion/hdr.frag

(limited to 'pbr/2.1.1.ibl_irradiance_conversion/hdr.frag')

diff --git a/pbr/2.1.1.ibl_irradiance_conversion/hdr.frag b/pbr/2.1.1.ibl_irradiance_conversion/hdr.frag
new file mode 100644
index 0000000..01650ae
--- /dev/null
+++ b/pbr/2.1.1.ibl_irradiance_conversion/hdr.frag
@@ -0,0 +1,18 @@
+#version 330 core
+
+in vert_t {
+	vec2 tex_coords;
+} vert;
+
+out vec4 frag_color;
+
+uniform sampler2D colorbuffer;
+
+void main(void)
+{
+	const float gamma = 2.2;
+	vec3 color = vec3(texture(colorbuffer, vert.tex_coords));
+	color /= color + vec3(1.0);
+	color = pow(color, vec3(1.0 / gamma));
+	frag_color = vec4(color, 1.0);
+}
-- 
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