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/*
* Copyright (C) 2014 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.
*/
package org.cyanogenmod.wallpapers.photophase.transitions;
import android.content.Context;
import android.opengl.GLES20;
import android.util.Log;
import org.cyanogenmod.wallpapers.photophase.utils.GLESUtil;
import org.cyanogenmod.wallpapers.photophase.PhotoFrame;
import org.cyanogenmod.wallpapers.photophase.TextureManager;
import org.cyanogenmod.wallpapers.photophase.transitions.Transitions.TRANSITIONS;
/**
* The base class of all transitions that can be applied to the {@link PhotoFrame} classes.
*/
public abstract class Transition {
public static final long MAX_TRANSTION_TIME = 1500L;
protected final Context mContext;
private final TextureManager mTextureManager;
protected int[] mProgramHandlers;
protected int[] mTextureHandlers;
protected int[] mPositionHandlers;
protected int[] mTextureCoordHandlers;
protected int[] mMVPMatrixHandlers;
protected PhotoFrame mTarget;
protected PhotoFrame mTransitionTarget;
private final int[] mVertexShader;
private final int[] mFragmentShader;
/**
* Constructor of <code>Transition</code>
*
* @param ctx The current context
* @param tm The current texture manager
* @param vertexShader The vertex shaders of the programs
* @param fragmentShader The fragment shaders of the programs
*/
public Transition(Context ctx, TextureManager tm, int[] vertexShader, int[] fragmentShader) {
super();
mContext = ctx;
mTextureManager = tm;
mVertexShader = vertexShader;
mFragmentShader = fragmentShader;
// Compile every program
assert mVertexShader.length != mFragmentShader.length;
int cc = mVertexShader.length;
mProgramHandlers = new int[cc];
mTextureHandlers = new int[cc];
mPositionHandlers = new int[cc];
mTextureCoordHandlers = new int[cc];
mMVPMatrixHandlers = new int[cc];
for (int i = 0; i < cc; i++) {
createProgram(i);
}
}
/**
* Method that requests to apply this transition.
*
* @param target The target photo frame
*/
public void select(PhotoFrame target) {
mTarget = target;
if (hasTransitionTarget()) {
// Load the transition frame and request a picture for it
mTransitionTarget =
new PhotoFrame(
mContext,
mTextureManager,
mTarget.getFrameVertex(),
mTarget.getPhotoVertex(),
mTarget.getBackgroundColor());
}
}
/**
* Method that returns the target of the transition.
*
* @return PhotoFrame The target of the transition
*/
public PhotoFrame getTarget() {
return mTarget;
}
/**
* Method that returns the transition target of the transition.
*
* @return PhotoFrame The transition target of the transition
*/
public PhotoFrame getTransitionTarget() {
return mTransitionTarget;
}
/**
* Method that returns if the transition is selectable for the passed frame.
*
* @param frame The frame which the transition should be applied to
* @return boolean If the transition is selectable for the passed frame
*/
public abstract boolean isSelectable(PhotoFrame frame);
/**
* Method that resets the current status of the transition.
*/
public abstract void reset();
/**
* Method that returns the type of transition.
*
* @return TRANSITIONS The type of transition
*/
public abstract TRANSITIONS getType();
/**
* Method that requests to apply this transition.
*
* @param matrix The model-view-projection matrix
*/
public abstract void apply(float[] matrix);
/**
* Method that returns if the transition is being transition.
*
* @return boolean If the transition is being transition.
*/
public abstract boolean isRunning();
/**
* Method that return if the transition has a secondary target
*
* @return boolean If the transition has a secondary target
*/
public abstract boolean hasTransitionTarget();
/**
* Method that creates the program
*/
protected void createProgram(int index) {
mProgramHandlers[index] =
GLESUtil.createProgram(
mContext.getResources(), mVertexShader[index], mFragmentShader[index]);
mTextureHandlers[index] =
GLES20.glGetAttribLocation(mProgramHandlers[index], "sTexture");
mPositionHandlers[index] =
GLES20.glGetAttribLocation(mProgramHandlers[index], "aPosition");
GLESUtil.glesCheckError("glGetAttribLocation");
mTextureCoordHandlers[index] =
GLES20.glGetAttribLocation(mProgramHandlers[index], "aTextureCoord");
GLESUtil.glesCheckError("glGetAttribLocation");
mMVPMatrixHandlers[index] =
GLES20.glGetUniformLocation(mProgramHandlers[index], "uMVPMatrix");
GLESUtil.glesCheckError("glGetUniformLocation");
}
/**
* Method that set the program to use
*
* @param index The index of the program to use
*/
protected void useProgram(int index) {
if (!GLES20.glIsProgram(mProgramHandlers[index])) {
createProgram(index);
}
GLES20.glUseProgram(mProgramHandlers[index]);
GLESUtil.glesCheckError("glUseProgram()");
}
/**
* Method that requests to the transition to remove its internal references and resources.
*/
public void recycle() {
int cc = mProgramHandlers.length;
for (int i = 0; i < cc; i++) {
if (GLES20.glIsProgram(mProgramHandlers[i])) {
if (GLESUtil.DEBUG_GL_MEMOBJS) {
Log.d(GLESUtil.DEBUG_GL_MEMOBJS_DEL_TAG, "glDeleteProgram: "
+ mProgramHandlers[i]);
}
GLES20.glDeleteProgram(mProgramHandlers[i]);
GLESUtil.glesCheckError("glDeleteProgram");
}
mProgramHandlers[i] = -1;
mTextureHandlers[i] = -1;
mPositionHandlers[i] = -1;
mTextureCoordHandlers[i] = -1;
mMVPMatrixHandlers[i] = -1;
}
mTransitionTarget = null;
mTarget = null;
}
}
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