/*
* Copyright (C) 2015 Jorge Ruesga
*
* 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 com.ruesga.android.wallpapers.photophase.transitions;
import android.content.Context;
import android.opengl.GLES20;
import android.opengl.Matrix;
import com.ruesga.android.wallpapers.photophase.PhotoFrame;
import com.ruesga.android.wallpapers.photophase.R;
import com.ruesga.android.wallpapers.photophase.textures.TextureManager;
import com.ruesga.android.wallpapers.photophase.transitions.Transitions.TRANSITIONS;
import com.ruesga.android.wallpapers.photophase.utils.GLESUtil;
import com.ruesga.android.wallpapers.photophase.utils.Utils;
import java.nio.FloatBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* A transition that applies a translation transition to the picture.
*/
public class TranslateTransition extends Transition {
/**
* The enumeration of all possibles translations movements
*/
public enum TRANSLATE_MODES {
/**
* Translate the picture from left to right
*/
LEFT_TO_RIGHT,
/**
* Translate the picture from right to left
*/
RIGHT_TO_LEFT,
/**
* Translate the picture from up to down
*/
UP_TO_DOWN,
/**
* Translate the picture from down to up
*/
DOWN_TO_UP
}
private static final int[] VERTEX_SHADER = {R.raw.default_vertex_shader, R.raw.default_vertex_shader};
private static final int[] FRAGMENT_SHADER = {R.raw.default_fragment_shader, R.raw.default_fragment_shader};
private static final float TRANSITION_TIME = 1200.0f;
private TRANSLATE_MODES mMode;
private float[] mTranslationMatrix = new float[16];
public TranslateTransition(Context ctx, TextureManager tm) {
super(ctx, tm, VERTEX_SHADER, FRAGMENT_SHADER);
// Initialized
reset();
}
@Override
public TRANSITIONS getType() {
return TRANSITIONS.TRANSLATE;
}
@Override
public float getTransitionTime() {
return TRANSITION_TIME;
}
@Override
public boolean hasTransitionTarget() {
return true;
}
@Override
public void select(PhotoFrame target) {
super.select(target);
chooseMode();
}
@Override
public boolean isSelectable(PhotoFrame frame) {
float[] vertex = frame.getFrameVertex();
return vertex[4] == -1.0f || vertex[6] == 1.0f ||
vertex[5] == 1.0f || vertex[1] == -1.0f;
}
@Override
public void chooseMode() {
// Discard all non-supported modes
List<TRANSLATE_MODES> modes = new ArrayList<>(Arrays.asList(TRANSLATE_MODES.values()));
float[] vertex = mTarget.getFrameVertex();
if (vertex[4] != -1.0f) {
modes.remove(TRANSLATE_MODES.RIGHT_TO_LEFT);
}
if (vertex[6] != 1.0f) {
modes.remove(TRANSLATE_MODES.LEFT_TO_RIGHT);
}
if (vertex[5] != 1.0f) {
modes.remove(TRANSLATE_MODES.DOWN_TO_UP);
}
if (vertex[1] != -1.0f) {
modes.remove(TRANSLATE_MODES.UP_TO_DOWN);
}
// Random mode
int low = 0;
int high = modes.size() - 1;
mMode = modes.get(Utils.getNextRandom(low, high));
}
@Override
public void applyTransition(float delta, float[] matrix, float offset) {
// Apply the transition
applyTransitionToDst(matrix);
if (delta < 1) {
applyTransitionToSrc(delta, matrix);
}
}
private void applyTransitionToSrc(float delta, float[] matrix) {
// Bind default FBO
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
GLESUtil.glesCheckError("glBindFramebuffer");
// Set the program
useProgram(0);
// Disable blending
GLES20.glDisable(GLES20.GL_BLEND);
GLESUtil.glesCheckError("glDisable");
// Set the input texture
int textureHandle = mTarget.getTextureHandle();
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLESUtil.glesCheckError("glActiveTexture");
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
GLESUtil.glesCheckError("glBindTexture");
GLES20.glUniform1i(mTextureHandlers[0], 0);
GLESUtil.glesCheckError("glBindTexture");
// Texture
FloatBuffer textureBuffer = mTarget.getTextureBuffer();
textureBuffer.position(0);
GLES20.glVertexAttribPointer(mTextureCoordHandlers[0], 2, GLES20.GL_FLOAT, false, 0, textureBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mTextureCoordHandlers[0]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Position
FloatBuffer positionBuffer = mTarget.getPositionBuffer();
positionBuffer.position(0);
GLES20.glVertexAttribPointer(mPositionHandlers[0], 2, GLES20.GL_FLOAT, false, 0, positionBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mPositionHandlers[0]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Calculate the delta distance
float distance =
(mMode.compareTo(TRANSLATE_MODES.LEFT_TO_RIGHT) == 0 || mMode.compareTo(TRANSLATE_MODES.RIGHT_TO_LEFT) == 0)
? mTarget.getFrameWidth()
: mTarget.getFrameHeight();
if (mMode.compareTo(TRANSLATE_MODES.RIGHT_TO_LEFT) == 0 || mMode.compareTo(TRANSLATE_MODES.DOWN_TO_UP) == 0) {
distance *= -1;
}
distance *= delta;
boolean vertical = (mMode.compareTo(TRANSLATE_MODES.UP_TO_DOWN) == 0 || mMode.compareTo(TRANSLATE_MODES.DOWN_TO_UP) == 0);
// Apply the projection and view transformation
if (vertical) {
Matrix.translateM(mTranslationMatrix, 0, matrix, 0, 0.0f, distance, 0.0f);
} else {
Matrix.translateM(mTranslationMatrix, 0, matrix, 0, distance, 0.0f, 0.0f);
}
GLES20.glUniformMatrix4fv(mMVPMatrixHandlers[0], 1, false, mTranslationMatrix, 0);
GLESUtil.glesCheckError("glUniformMatrix4fv");
// Draw
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLESUtil.glesCheckError("glDrawElements");
// Disable attributes
GLES20.glDisableVertexAttribArray(mPositionHandlers[0]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
GLES20.glDisableVertexAttribArray(mTextureCoordHandlers[0]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
}
private void applyTransitionToDst(float[] matrix) {
// Bind default FBO
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
GLESUtil.glesCheckError("glBindFramebuffer");
// Set the program
useProgram(1);
// Disable blending
GLES20.glDisable(GLES20.GL_BLEND);
GLESUtil.glesCheckError("glDisable");
// Set the input texture
int textureHandle = mTransitionTarget.getTextureHandle();
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLESUtil.glesCheckError("glActiveTexture");
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
GLESUtil.glesCheckError("glBindTexture");
GLES20.glUniform1i(mTextureHandlers[1], 0);
GLESUtil.glesCheckError("glUniform1i");
// Texture
FloatBuffer textureBuffer = mTransitionTarget.getTextureBuffer();
textureBuffer.position(0);
GLES20.glVertexAttribPointer(mTextureCoordHandlers[1], 2, GLES20.GL_FLOAT, false, 0, textureBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mTextureCoordHandlers[1]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Position
FloatBuffer positionBuffer = mTransitionTarget.getPositionBuffer();
positionBuffer.position(0);
GLES20.glVertexAttribPointer(mPositionHandlers[1], 2, GLES20.GL_FLOAT, false, 0, positionBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mPositionHandlers[1]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Apply the projection and view transformation
GLES20.glUniformMatrix4fv(mMVPMatrixHandlers[1], 1, false, matrix, 0);
GLESUtil.glesCheckError("glUniformMatrix4fv");
// Draw
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLESUtil.glesCheckError("glDrawElements");
// Disable attributes
GLES20.glDisableVertexAttribArray(mPositionHandlers[1]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
GLES20.glDisableVertexAttribArray(mTextureCoordHandlers[1]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
}
}