Initial commit

data/shaders/color_grayscale.fragment

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+// __multiversion__
+// This signals the loading code to prepend either #version 100 or #version 300 es as apropriate.
+
+// To use centroid sampling we need to have version 300 es shaders, which requires changing:
+// attribute to in
+// varying to out when in vertex shaders or in when in fragment shaders
+// defining an out vec4 FragColor and replacing uses of gl_FragColor with FragColor
+// texture2D to texture
+#if __VERSION__ >= 300
+
+// version 300 code
+#ifdef MSAA_FRAMEBUFFER_ENABLED
+#define _centroid centroid
+#else
+#define _centroid
+#endif
+
+_centroid in vec2 uv;
+
+#define varying in
+#define texture2D texture
+out vec4 FragColor;
+#define gl_FragColor FragColor
+
+#else
+
+// version 100 code
+varying vec2 uv;
+
+#endif
+
+uniform vec4 CURRENT_COLOR;
+uniform sampler2D TEXTURE_0;
+
+void main()
+{
+	vec4 diffuse = texture2D( TEXTURE_0, uv );
+
+#ifdef ALPHA_TEST
+	if(diffuse.a < 0.5)
+		discard;
+#endif
+
+	float grayscale = (CURRENT_COLOR.r * diffuse.r * 0.3 + CURRENT_COLOR.g * diffuse.g * 0.59 + CURRENT_COLOR.b * diffuse.b * 0.11);
+	vec4 gray_color = vec4(grayscale, grayscale, grayscale, CURRENT_COLOR.a * diffuse.a);
+	gl_FragColor = gray_color;
+}
+
+
+