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/**
* Copyright 2011 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``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 JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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 THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.graph.curve.opengl;
import javax.media.opengl.GL;
import javax.media.opengl.GL2ES2;
import javax.media.opengl.GLUniformData;
import jogamp.graph.curve.opengl.RenderStateImpl;
import jogamp.graph.curve.opengl.shader.UniformNames;
import com.jogamp.common.os.Platform;
import com.jogamp.graph.curve.Region;
import com.jogamp.graph.geom.Vertex;
import com.jogamp.opengl.util.PMVMatrix;
import com.jogamp.opengl.util.glsl.ShaderState;
public abstract class RenderState {
private static final String thisKey = "jogamp.graph.curve.RenderState" ;
/**
* Bitfield hint, {@link #isHintBitSet(int) if set}
* stating <i>enabled</i> {@link GL#GL_BLEND}, otherwise <i>disabled</i>.
* <p>
* Shall be set via {@link #setHintBits(int)} and cleared via {@link #clearHintBits(int)}.
* </p>
* <p>
* Due to alpha blending and multipass rendering, e.g. {@link Region#VBAA_RENDERING_BIT},
* the clear-color shall be set to the {@link #getColorStatic() foreground color} and <i>zero alpha</i>,
* otherwise blending will amplify the scene's clear-color.
* </p>
* <p>
* Shall be called by custom code, e.g. via {@link RegionRenderer}'s
* enable and disable {@link RegionRenderer.GLCallback} as done in
* {@link RegionRenderer#defaultBlendEnable} and {@link RegionRenderer#defaultBlendDisable}.
* </p>
*/
public static final int BITHINT_BLENDING_ENABLED = 1 << 0 ;
public static RenderState createRenderState(ShaderState st, Vertex.Factory<? extends Vertex> pointFactory) {
return new RenderStateImpl(st, pointFactory, null);
}
public static RenderState createRenderState(ShaderState st, Vertex.Factory<? extends Vertex> pointFactory, PMVMatrix pmvMatrix) {
return new RenderStateImpl(st, pointFactory, pmvMatrix);
}
public static final RenderState getRenderState(GL2ES2 gl) {
return (RenderState) gl.getContext().getAttachedObject(thisKey);
}
protected final ShaderState st;
protected final Vertex.Factory<? extends Vertex> vertexFactory;
protected final PMVMatrix pmvMatrix;
protected final GLUniformData gcu_PMVMatrix;
protected int hintBitfield;
protected RenderState(ShaderState st, Vertex.Factory<? extends Vertex> vertexFactory, PMVMatrix pmvMatrix) {
this.st = st;
this.vertexFactory = vertexFactory;
this.pmvMatrix = null != pmvMatrix ? pmvMatrix : new PMVMatrix();
this.gcu_PMVMatrix = new GLUniformData(UniformNames.gcu_PMVMatrix, 4, 4, this.pmvMatrix.glGetPMvMatrixf());
st.ownUniform(gcu_PMVMatrix);
this.hintBitfield = 0;
}
public final ShaderState getShaderState() { return st; }
public final Vertex.Factory<? extends Vertex> getVertexFactory() { return vertexFactory; }
public final PMVMatrix pmvMatrix() { return pmvMatrix; }
public final GLUniformData getPMVMatrix() { return gcu_PMVMatrix; }
public final boolean isHintBitSet(int mask) {
return mask == ( hintBitfield & mask );
}
public final void setHintBits(int mask) {
hintBitfield |= mask;
}
public final void clearHintBits(int mask) {
hintBitfield &= ~mask;
}
public void destroy(GL2ES2 gl) {
st.destroy(gl);
}
public abstract GLUniformData getWeight();
public abstract GLUniformData getAlpha();
public abstract GLUniformData getColorStatic();
// public abstract GLUniformData getStrength();
public final RenderState attachTo(GL2ES2 gl) {
return (RenderState) gl.getContext().attachObject(thisKey, this);
}
public final boolean detachFrom(GL2ES2 gl) {
RenderState _rs = (RenderState) gl.getContext().getAttachedObject(thisKey);
if(_rs == this) {
gl.getContext().detachObject(thisKey);
return true;
}
return false;
}
public StringBuilder toString(StringBuilder sb, boolean alsoUnlocated) {
if(null==sb) {
sb = new StringBuilder();
}
sb.append("RenderState[");
st.toString(sb, alsoUnlocated).append(Platform.getNewline());
sb.append("]");
return sb;
}
@Override
public String toString() {
return toString(null, false).toString();
}
}
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