Initial commit

shader/sprite.frag

@@ -0,0 +1,43 @@
+
+uniform sampler2D texture;
+
+uniform vec4 tone;
+
+uniform float opacity;
+uniform vec4 color;
+uniform vec4 flash;
+
+uniform float bushDepth;
+uniform float bushOpacity;
+
+const vec3 lumaF = { .299, .587, .114 };
+
+void main()
+{
+	vec2 coor = gl_TexCoord[0].xy;
+
+	/* Sample source color */
+	vec4 frag = texture2D(texture, coor);
+	
+	/* Apply gray */
+	const float luma = dot(frag.rgb, lumaF);
+	frag.rgb = mix(frag.rgb, vec3(luma), tone.w);
+	
+	/* Apply tone */
+	frag.rgb += tone.rgb;
+
+	/* Apply opacity */
+	frag.a *= opacity;
+	
+	/* Apply color */
+	frag.rgb = mix(frag.rgb, color.rgb, color.a);
+
+	/* Apply flash */
+	frag.rgb = mix(frag.rgb, flash.rgb, flash.a);
+
+	/* Apply bush alpha by mathematical if */
+	float underBush = float(coor.y < bushDepth);
+	frag.a *= clamp(bushOpacity + underBush, 0, 1);
+	
+	gl_FragColor = frag;
+}