From e142166c3e2d6f567ed0d4e4c414fa510271260f Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Fri, 7 May 2021 09:49:57 -0400
Subject: graphics: pbr: Extract shader code to separate files.

---
 data/shaders/pbr-frag.glsl | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 data/shaders/pbr-frag.glsl

(limited to 'data/shaders/pbr-frag.glsl')

diff --git a/data/shaders/pbr-frag.glsl b/data/shaders/pbr-frag.glsl
new file mode 100644
index 0000000..813f9a9
--- /dev/null
+++ b/data/shaders/pbr-frag.glsl
@@ -0,0 +1,42 @@
+// -*- mode: c -*-
+
+#ifdef GLSL120
+attribute vec2 fragTexcoord0;
+attribute vec2 fragTexcoord1
+attribute vec4 fragColor0;
+#else
+in vec2 fragTexcoord0;
+in vec2 fragTexcoord1;
+in vec4 fragColor0;
+#endif
+
+#ifdef GLSL330
+out vec4 fragColor;
+#endif
+
+uniform bool textured0;
+uniform bool textured1;
+uniform bool vertexColored;
+uniform vec3 baseColorFactor;
+uniform sampler2D texture0;
+uniform sampler2D texture1;
+
+void main (void) {
+  vec4 finalColor = vec4(baseColorFactor, 1.0);
+  // Vertex coloring.
+  if(vertexColored) {
+    finalColor *= fragColor0;
+  }
+  // Texture sampling.
+  if(textured0) {
+    finalColor *= texture(texture0, fragTexcoord0);
+  }
+  if(textured1) {
+    finalColor += texture(texture1, fragTexcoord1);
+  }
+#ifdef GLSL330
+  fragColor = finalColor;
+#else
+  gl_FragColor = finalColor;
+#endif
+}
-- 
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