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Diffstat (limited to 'src/org/cyanogenmod/wallpapers/photophase/effects/ScanlinesEffect.java')
-rw-r--r-- | src/org/cyanogenmod/wallpapers/photophase/effects/ScanlinesEffect.java | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/org/cyanogenmod/wallpapers/photophase/effects/ScanlinesEffect.java b/src/org/cyanogenmod/wallpapers/photophase/effects/ScanlinesEffect.java new file mode 100644 index 0000000..cd78307 --- /dev/null +++ b/src/org/cyanogenmod/wallpapers/photophase/effects/ScanlinesEffect.java @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2013 The CyanogenMod Project + * + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +// +// Based on the shaders of Max Maischein of App-VideoMixer: +// http://cpansearch.perl.org/src/CORION/App-VideoMixer-0.02/filters/scanlines.glsl +// + +package org.cyanogenmod.wallpapers.photophase.effects; + +import android.media.effect.EffectContext; + +/** + * A TV scanline effect<br/> + * <table> + * <tr><td>Parameter name</td><td>Meaning</td><td>Valid values</td></tr> + * </table> + */ +public class ScanlinesEffect extends PhotoPhaseEffect { + + private static final String FRAGMENT_SHADER = + "precision mediump float;\n" + + "uniform sampler2D tex_sampler;\n" + + "uniform float offset;\n" + + "float frequency = 83.0;\n" + + "varying vec2 v_texcoord;\n" + + "void main(void)\n" + + "{\n" + + " float global_pos = (v_texcoord.y + offset) * frequency;\n" + + " float wave_pos = cos((fract(global_pos) - 0.5)*3.14);\n" + + " vec4 pel = texture2D(tex_sampler, v_texcoord);\n" + + " gl_FragColor = mix(vec4(0,0,0,0), pel, wave_pos);\n" + + "}"; + + /** + * Constructor of <code>ScanlinesEffect</code>. + * + * @param ctx The effect context + * @param name The effect name + */ + public ScanlinesEffect(EffectContext ctx, String name) { + super(ctx, ScanlinesEffect.class.getName()); + init(VERTEX_SHADER, FRAGMENT_SHADER); + } + +} |