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/******************************************************************************
* Spine Runtimes License Agreement
* Last updated January 1, 2020. Replaces all prior versions.
*
* Copyright (c) 2013-2020, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software
* or otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
package com.esotericsoftware.spine;
import static com.badlogic.gdx.graphics.GL20.*;
import com.badlogic.gdx.graphics.g2d.Batch;
/** Determines how images are blended with existing pixels when drawn. */
public enum BlendMode {
normal(GL_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE), //
additive(GL_SRC_ALPHA, GL_ONE, GL_ONE, GL_ONE), //
multiply(GL_DST_COLOR, GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA), //
screen(GL_ONE, GL_ONE, GL_ONE_MINUS_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR);
public final int source, sourcePMA, destColor, sourceAlpha;
BlendMode (int source, int sourcePMA, int destColor, int sourceAlpha) {
this.source = source;
this.sourcePMA = sourcePMA;
this.destColor = destColor;
this.sourceAlpha = sourceAlpha;
}
public void apply (Batch batch, boolean premultipliedAlpha) {
batch.setBlendFunctionSeparate(premultipliedAlpha ? sourcePMA : source, destColor, sourceAlpha, destColor);
}
static public final BlendMode[] values = values();
}
