From 9a578c59624f671418a1f3b046b6b09aa4233909 Mon Sep 17 00:00:00 2001
From: raysan5 <raysan5@gmail.com>
Date: Wed, 2 Sep 2015 01:06:55 +0200
Subject: Added shaders examples resources

---
 examples/resources/shaders/base.vs             | 14 ++++-----
 examples/resources/shaders/bloom.fs            | 42 ++++++++++++++++++++++++++
 examples/resources/shaders/custom.fs           | 16 ----------
 examples/resources/shaders/custom.vs           | 16 ----------
 examples/resources/shaders/grayscale.fs        | 17 +++++++----
 examples/resources/shaders/shapes_base.vs      | 19 ++++++++++++
 examples/resources/shaders/shapes_grayscale.fs | 15 +++++++++
 examples/resources/shaders/swirl.fs            | 41 +++++++++++++++++++++++++
 8 files changed, 135 insertions(+), 45 deletions(-)
 create mode 100644 examples/resources/shaders/bloom.fs
 delete mode 100644 examples/resources/shaders/custom.fs
 delete mode 100644 examples/resources/shaders/custom.vs
 create mode 100644 examples/resources/shaders/shapes_base.vs
 create mode 100644 examples/resources/shaders/shapes_grayscale.fs
 create mode 100644 examples/resources/shaders/swirl.fs

(limited to 'examples/resources')

diff --git a/examples/resources/shaders/base.vs b/examples/resources/shaders/base.vs
index 78e543b7..59eae0a0 100644
--- a/examples/resources/shaders/base.vs
+++ b/examples/resources/shaders/base.vs
@@ -1,19 +1,19 @@
-#version 110
+#version 330
 
-attribute vec3 vertexPosition;
-attribute vec2 vertexTexCoord;
-attribute vec4 vertexColor;
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+
+out vec2 fragTexCoord;
 
 uniform mat4 projectionMatrix;
 uniform mat4 modelviewMatrix;
 
-varying vec2 fragTexCoord;
-varying vec4 fragColor;
+// NOTE: Add here your custom variables 
 
 void main()
 {
     fragTexCoord = vertexTexCoord;
-    fragColor = vertexColor;
     
     gl_Position = projectionMatrix*modelviewMatrix*vec4(vertexPosition, 1.0);
 }
\ No newline at end of file
diff --git a/examples/resources/shaders/bloom.fs b/examples/resources/shaders/bloom.fs
new file mode 100644
index 00000000..f9cebe18
--- /dev/null
+++ b/examples/resources/shaders/bloom.fs
@@ -0,0 +1,42 @@
+#version 330
+
+in vec2 fragTexCoord;
+
+out vec4 fragColor;
+
+uniform sampler2D texture0;
+uniform vec4 tintColor;
+
+// NOTE: Add here your custom variables
+
+void main()
+{
+    vec4 sum = vec4(0);
+    vec4 tc = vec4(0);
+
+    for (int i = -4; i < 4; i++)
+    {
+        for (int j = -3; j < 3; j++)
+        {
+            sum += texture2D(texture0, fragTexCoord + vec2(j, i)*0.004) * 0.25;
+        }
+    }
+    
+    if (texture2D(texture0, fragTexCoord).r < 0.3)
+    {
+        tc = sum*sum*0.012 + texture2D(texture0, fragTexCoord);
+    }
+    else
+    {
+        if (texture2D(texture0, fragTexCoord).r < 0.5)
+        {
+            tc = sum*sum*0.009 + texture2D(texture0, fragTexCoord);
+        }
+        else
+        {
+            tc = sum*sum*0.0075 + texture2D(texture0, fragTexCoord);
+        }
+    }
+    
+    fragColor = tc;
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/custom.fs b/examples/resources/shaders/custom.fs
deleted file mode 100644
index 1e53933b..00000000
--- a/examples/resources/shaders/custom.fs
+++ /dev/null
@@ -1,16 +0,0 @@
-#version 330
-
-uniform sampler2D texture0;
-varying vec2 fragTexCoord;
-
-uniform vec4 tintColor;
-
-void main()
-{
-    vec4 base = texture2D(texture0, fragTexCoord)*tintColor;
-    
-    // Convert to grayscale using NTSC conversion weights
-    float gray = dot(base.rgb, vec3(0.299, 0.587, 0.114));
-    
-    gl_FragColor = vec4(gray, gray, gray, tintColor.a);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/custom.vs b/examples/resources/shaders/custom.vs
deleted file mode 100644
index 629c954d..00000000
--- a/examples/resources/shaders/custom.vs
+++ /dev/null
@@ -1,16 +0,0 @@
-#version 330
-
-attribute vec3 vertexPosition;
-attribute vec2 vertexTexCoord;
-attribute vec3 vertexNormal;
-
-uniform mat4 projectionMatrix;
-uniform mat4 modelviewMatrix;
-
-varying vec2 fragTexCoord;
-
-void main()
-{
-    fragTexCoord = vertexTexCoord;
-    gl_Position = projectionMatrix*modelviewMatrix*vec4(vertexPosition, 1.0);
-}
\ No newline at end of file
diff --git a/examples/resources/shaders/grayscale.fs b/examples/resources/shaders/grayscale.fs
index 1b778871..38337e00 100644
--- a/examples/resources/shaders/grayscale.fs
+++ b/examples/resources/shaders/grayscale.fs
@@ -1,15 +1,20 @@
-#version 110
+#version 330
+
+in vec2 fragTexCoord;
+
+out vec4 fragColor;
 
 uniform sampler2D texture0;
-varying vec2 fragTexCoord;
-varying vec4 fragColor;
+uniform vec4 tintColor;
+
+// NOTE: Add here your custom variables
 
 void main()
 {
-    vec4 base = texture2D(texture0, fragTexCoord)*fragColor;
-
+    vec4 base = texture2D(texture0, fragTexCoord)*tintColor;
+    
     // Convert to grayscale using NTSC conversion weights
     float gray = dot(base.rgb, vec3(0.299, 0.587, 0.114));
     
-    gl_FragColor = vec4(gray, gray, gray, base.a);
+    fragColor = vec4(gray, gray, gray, tintColor.a);
 }
\ No newline at end of file
diff --git a/examples/resources/shaders/shapes_base.vs b/examples/resources/shaders/shapes_base.vs
new file mode 100644
index 00000000..78e543b7
--- /dev/null
+++ b/examples/resources/shaders/shapes_base.vs
@@ -0,0 +1,19 @@
+#version 110
+
+attribute vec3 vertexPosition;
+attribute vec2 vertexTexCoord;
+attribute vec4 vertexColor;
+
+uniform mat4 projectionMatrix;
+uniform mat4 modelviewMatrix;
+
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+void main()
+{
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    
+    gl_Position = projectionMatrix*modelviewMatrix*vec4(vertexPosition, 1.0);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/shapes_grayscale.fs b/examples/resources/shaders/shapes_grayscale.fs
new file mode 100644
index 00000000..1b778871
--- /dev/null
+++ b/examples/resources/shaders/shapes_grayscale.fs
@@ -0,0 +1,15 @@
+#version 110
+
+uniform sampler2D texture0;
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+void main()
+{
+    vec4 base = texture2D(texture0, fragTexCoord)*fragColor;
+
+    // Convert to grayscale using NTSC conversion weights
+    float gray = dot(base.rgb, vec3(0.299, 0.587, 0.114));
+    
+    gl_FragColor = vec4(gray, gray, gray, base.a);
+}
\ No newline at end of file
diff --git a/examples/resources/shaders/swirl.fs b/examples/resources/shaders/swirl.fs
new file mode 100644
index 00000000..ba26cc05
--- /dev/null
+++ b/examples/resources/shaders/swirl.fs
@@ -0,0 +1,41 @@
+#version 330
+
+in vec2 fragTexCoord;
+
+out vec4 fragColor;
+
+uniform sampler2D texture0;
+uniform vec4 tintColor;
+
+// NOTE: Add here your custom variables
+
+const float renderWidth = 800;      // HARDCODED for example!
+const float renderHeight = 480;     // Use uniforms instead...
+
+float radius = 250.0;
+float angle = 0.8;
+
+uniform vec2 center = vec2(200, 200);
+
+void main (void)
+{
+    vec2 texSize = vec2(renderWidth, renderHeight);
+    vec2 tc = fragTexCoord*texSize;
+    tc -= center;
+    float dist = length(tc);
+
+    if (dist < radius) 
+    {
+        float percent = (radius - dist)/radius;
+        float theta = percent*percent*angle*8.0;
+        float s = sin(theta);
+        float c = cos(theta);
+        
+        tc = vec2(dot(tc, vec2(c, -s)), dot(tc, vec2(s, c)));
+    }
+
+    tc += center;
+    vec3 color = texture2D(texture0, tc/texSize).rgb;
+
+    fragColor = vec4(color, 1.0);;
+}
\ No newline at end of file
-- 
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