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 ++++++++++++++++++++++++++++++++++++++++++
 data/shaders/pbr-vert.glsl | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 data/shaders/pbr-frag.glsl
 create mode 100644 data/shaders/pbr-vert.glsl

(limited to 'data/shaders')

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
+}
diff --git a/data/shaders/pbr-vert.glsl b/data/shaders/pbr-vert.glsl
new file mode 100644
index 0000000..f622988
--- /dev/null
+++ b/data/shaders/pbr-vert.glsl
@@ -0,0 +1,39 @@
+// -*- mode: c -*-
+
+#ifdef GLSL330
+layout (location = 0) in vec3 position;
+layout (location = 1) in vec2 texcoord0;
+layout (location = 2) in vec2 texcoord1;
+layout (location = 3) in vec4 color0;
+#elif defined(GLSL130)
+in vec3 position;
+in vec2 texcoord0;
+in vec2 texcoord1;
+in vec4 color0;
+#elif defined(GLSL120)
+attribute vec3 position;
+attribute vec2 texcoord0;
+attribute vec2 texcoord1;
+attribute vec4 color0;
+#endif
+
+#ifdef GLSL120
+varying vec2 fragTexcoord0;
+varying vec2 fragTexcoord1;
+varying vec4 fragColor0;
+#else
+out vec2 fragTexcoord0;
+out vec2 fragTexcoord1;
+out vec4 fragColor0;
+#endif
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main(void) {
+  fragTexcoord0 = texcoord0;
+  fragTexcoord1 = texcoord1;
+  fragColor0 = color0;
+  gl_Position = projection * view * model * vec4(position.xyz, 1.0);
+}
-- 
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