2 files changed, 17 insertions, 12 deletions
diff --git a/examples/shaders/resources/shaders/glsl100/palette_switch.fs b/examples/shaders/resources/shaders/glsl100/palette_switch.fs
index 25b49632..d8d696d4 100644
--- a/examples/shaders/resources/shaders/glsl100/palette_switch.fs
+++ b/examples/shaders/resources/shaders/glsl100/palette_switch.fs
@@ -2,7 +2,7 @@
 
 precision mediump float;
 
-const int colors = 8;
+const int MAX_INDEXED_COLORS = 8;
 
 // Input vertex attributes (from vertex shader)
 varying vec2 fragTexCoord;
@@ -10,7 +10,8 @@ varying vec4 fragColor;
 
 // Input uniform values
 uniform sampler2D texture0;
-uniform ivec3 palette[colors];
+uniform ivec3 palette[MAX_INDEXED_COLORS];
+//uniform sampler2D palette; // Alternative to ivec3, palette provided as a 256x1 texture
 
 void main()
 {
@@ -18,13 +19,13 @@ void main()
     vec4 texelColor = texture2D(texture0, fragTexCoord)*fragColor;
 
     // Convert the (normalized) texel color RED component (GB would work, too)
-    // to the palette index by scaling up from [0, 1] to [0, 255].
+    // to the palette index by scaling up from [0..1] to [0..255]
     int index = int(texelColor.r*255.0);
-
+    
     ivec3 color = ivec3(0);
 
     // NOTE: On GLSL 100 we are not allowed to index a uniform array by a variable value,
-    // a constantmust be used, so this logic...
+    // a constant must be used, so this logic...
     if (index == 0) color = palette[0];
     else if (index == 1) color = palette[1];
     else if (index == 2) color = palette[2];
@@ -33,9 +34,10 @@ void main()
     else if (index == 5) color = palette[5];
     else if (index == 6) color = palette[6];
     else if (index == 7) color = palette[7];
+    
+    //gl_FragColor = texture2D(palette, texelColor.xy); // Alternative to ivec3
 
     // Calculate final fragment color. Note that the palette color components
-    // are defined in the range [0, 255] and need to be normalized to [0, 1]
-    // for OpenGL to work.
+    // are defined in the range [0..255] and need to be normalized to [0..1]
     gl_FragColor = vec4(float(color.x)/255.0, float(color.y)/255.0, float(color.z)/255.0, texelColor.a);
 }
diff --git a/examples/shaders/resources/shaders/glsl330/palette_switch.fs b/examples/shaders/resources/shaders/glsl330/palette_switch.fs
index 7c8a488c..6a82529b 100644
--- a/examples/shaders/resources/shaders/glsl330/palette_switch.fs
+++ b/examples/shaders/resources/shaders/glsl330/palette_switch.fs
@@ -1,6 +1,6 @@
 #version 330
 
-const int colors = 8;
+const int MAX_INDEXED_COLORS = 8;
 
 // Input fragment attributes (from fragment shader)
 in vec2 fragTexCoord;
@@ -8,7 +8,8 @@ in vec4 fragColor;
 
 // Input uniform values
 uniform sampler2D texture0;
-uniform ivec3 palette[colors];
+uniform ivec3 palette[MAX_INDEXED_COLORS];
+//uniform sampler2D palette; // Alternative to ivec3, palette provided as a 256x1 texture
 
 // Output fragment color
 out vec4 finalColor;
@@ -16,15 +17,17 @@ out vec4 finalColor;
 void main()
 {
     // Texel color fetching from texture sampler
+    // NOTE: The texel is actually the a GRAYSCALE index color
     vec4 texelColor = texture(texture0, fragTexCoord)*fragColor;
 
     // Convert the (normalized) texel color RED component (GB would work, too)
-    // to the palette index by scaling up from [0, 1] to [0, 255].
+    // to the palette index by scaling up from [0..1] to [0..255]
     int index = int(texelColor.r*255.0);
     ivec3 color = palette[index];
+    
+    //finalColor = texture(palette, texelColor.xy); // Alternative to ivec3
 
     // Calculate final fragment color. Note that the palette color components
-    // are defined in the range [0, 255] and need to be normalized to [0, 1]
-    // for OpenGL to work.
+    // are defined in the range [0..255] and need to be normalized to [0..1]
     finalColor = vec4(color/255.0, texelColor.a);
 }