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Diffstat (limited to 'src/org/cyanogenmod/wallpapers/photophase/effects/OutlineEffect.java')
-rw-r--r-- | src/org/cyanogenmod/wallpapers/photophase/effects/OutlineEffect.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/org/cyanogenmod/wallpapers/photophase/effects/OutlineEffect.java b/src/org/cyanogenmod/wallpapers/photophase/effects/OutlineEffect.java new file mode 100644 index 0000000..8dc7854 --- /dev/null +++ b/src/org/cyanogenmod/wallpapers/photophase/effects/OutlineEffect.java @@ -0,0 +1,74 @@ +/* + * 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 kodemongki: +// http://kodemongki.blogspot.com.es/2011/06/kameraku-custom-shader-effects-example.html +// + +package org.cyanogenmod.wallpapers.photophase.effects; + +import android.media.effect.EffectContext; + +/** + * An outline effect (highlight edges)<br/> + * <table> + * <tr><td>Parameter name</td><td>Meaning</td><td>Valid values</td></tr> + * </table> + */ +public class OutlineEffect extends PhotoPhaseEffect { + + private static final String FRAGMENT_SHADER = + "precision mediump float;\n" + + "uniform sampler2D tex_sampler;\n" + + "varying vec2 v_texcoord;\n" + + "const float step_w = 0.0015625;\n" + + "const float step_h = 0.0027778;\n" + + "void main(void)\n" + + "{\n" + + " vec3 t1 = texture2D(tex_sampler, vec2(v_texcoord.x - step_w, v_texcoord.y - step_h)).bgr;\n" + + " vec3 t2 = texture2D(tex_sampler, vec2(v_texcoord.x, v_texcoord.y - step_h)).bgr;\n" + + " vec3 t3 = texture2D(tex_sampler, vec2(v_texcoord.x + step_w, v_texcoord.y - step_h)).bgr;\n" + + " vec3 t4 = texture2D(tex_sampler, vec2(v_texcoord.x - step_w, v_texcoord.y)).bgr;\n" + + " vec3 t5 = texture2D(tex_sampler, v_texcoord).bgr;\n" + + " vec3 t6 = texture2D(tex_sampler, vec2(v_texcoord.x + step_w, v_texcoord.y)).bgr;\n" + + " vec3 t7 = texture2D(tex_sampler, vec2(v_texcoord.x - step_w, v_texcoord.y + step_h)).bgr;\n" + + " vec3 t8 = texture2D(tex_sampler, vec2(v_texcoord.x, v_texcoord.y + step_h)).bgr;\n" + + " vec3 t9 = texture2D(tex_sampler, vec2(v_texcoord.x + step_w, v_texcoord.y + step_h)).bgr;\n" + + " vec3 xx= t1 + 2.0*t2 + t3 - t7 - 2.0*t8 - t9;\n" + + " vec3 yy = t1 - t3 + 2.0*t4 - 2.0*t6 + t7 - t9;\n" + + " vec3 rr = sqrt(xx * xx + yy * yy);\n" + + " float y = (rr.r + rr.g + rr.b) / 3.0;\n" + + " if (y > 0.2)\n" + + " rr = vec3(0.0, 0.0, 0.0);\n" + + " else\n" + + " rr = vec3(1.0, 1.0, 1.0);\n" + + " gl_FragColor.a = 1.0;\n" + + " gl_FragColor.rgb = rr;\n" + + "}"; + + /** + * Constructor of <code>OutlineEffect</code>. + * + * @param ctx The effect context + * @param name The effect name + */ + public OutlineEffect(EffectContext ctx, String name) { + super(ctx, OutlineEffect.class.getName()); + init(VERTEX_SHADER, FRAGMENT_SHADER); + } + +} |