some prb examples

1 files changed, 18 insertions, 0 deletions

diff --git a/pbr/2.1.2.ibl_irradiance/hdr.frag b/pbr/2.1.2.ibl_irradiance/hdr.frag
new file mode 100644
index 0000000..01650ae
--- /dev/null
+++ b/pbr/2.1.2.ibl_irradiance/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);
+}