124 lines
4.1 KiB
Java
124 lines
4.1 KiB
Java
/*
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* Copyright (C) 2021 pedroSG94.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.pedro.encoder.input.gl.render.filters;
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import android.content.Context;
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import android.opengl.GLES20;
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import android.opengl.Matrix;
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import android.os.Build;
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import androidx.annotation.RequiresApi;
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import com.pedro.encoder.R;
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import com.pedro.encoder.utils.gl.GlUtil;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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/**
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* Created by pedro on 1/02/18.
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*/
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@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
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public class TemperatureFilterRender extends BaseFilterRender {
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//rotation matrix
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private final float[] squareVertexDataFilter = {
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// X, Y, Z, U, V
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-1f, -1f, 0f, 0f, 0f, //bottom left
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1f, -1f, 0f, 1f, 0f, //bottom right
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-1f, 1f, 0f, 0f, 1f, //top left
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1f, 1f, 0f, 1f, 1f, //top right
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};
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private int program = -1;
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private int aPositionHandle = -1;
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private int aTextureHandle = -1;
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private int uMVPMatrixHandle = -1;
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private int uSTMatrixHandle = -1;
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private int uSamplerHandle = -1;
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private int uTemperatureHandle = -1;
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private float temperature = 0.8f;
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public TemperatureFilterRender() {
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squareVertex = ByteBuffer.allocateDirect(squareVertexDataFilter.length * FLOAT_SIZE_BYTES)
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.order(ByteOrder.nativeOrder())
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.asFloatBuffer();
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squareVertex.put(squareVertexDataFilter).position(0);
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Matrix.setIdentityM(MVPMatrix, 0);
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Matrix.setIdentityM(STMatrix, 0);
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}
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@Override
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protected void initGlFilter(Context context) {
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String vertexShader = GlUtil.getStringFromRaw(context, R.raw.simple_vertex);
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String fragmentShader = GlUtil.getStringFromRaw(context, R.raw.temperature_fragment);
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program = GlUtil.createProgram(vertexShader, fragmentShader);
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aPositionHandle = GLES20.glGetAttribLocation(program, "aPosition");
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aTextureHandle = GLES20.glGetAttribLocation(program, "aTextureCoord");
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uMVPMatrixHandle = GLES20.glGetUniformLocation(program, "uMVPMatrix");
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uSTMatrixHandle = GLES20.glGetUniformLocation(program, "uSTMatrix");
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uSamplerHandle = GLES20.glGetUniformLocation(program, "uSampler");
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uTemperatureHandle = GLES20.glGetUniformLocation(program, "uTemperature");
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}
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@Override
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protected void drawFilter() {
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GLES20.glUseProgram(program);
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squareVertex.position(SQUARE_VERTEX_DATA_POS_OFFSET);
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GLES20.glVertexAttribPointer(aPositionHandle, 3, GLES20.GL_FLOAT, false,
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SQUARE_VERTEX_DATA_STRIDE_BYTES, squareVertex);
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GLES20.glEnableVertexAttribArray(aPositionHandle);
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squareVertex.position(SQUARE_VERTEX_DATA_UV_OFFSET);
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GLES20.glVertexAttribPointer(aTextureHandle, 2, GLES20.GL_FLOAT, false,
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SQUARE_VERTEX_DATA_STRIDE_BYTES, squareVertex);
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GLES20.glEnableVertexAttribArray(aTextureHandle);
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GLES20.glUniformMatrix4fv(uMVPMatrixHandle, 1, false, MVPMatrix, 0);
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GLES20.glUniformMatrix4fv(uSTMatrixHandle, 1, false, STMatrix, 0);
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GLES20.glUniform1f(uTemperatureHandle, temperature);
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GLES20.glUniform1i(uSamplerHandle, 4);
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GLES20.glActiveTexture(GLES20.GL_TEXTURE4);
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GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, previousTexId);
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}
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@Override
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public void release() {
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GLES20.glDeleteProgram(program);
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}
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public float getTemperature() {
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return temperature;
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}
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/**
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* @param temperature min value 0f, max value 1f
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*/
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public void setTemperature(float temperature) {
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if (temperature < 0.0f) {
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this.temperature = 0.0f;
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} else if (temperature > 1.0f) {
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this.temperature = 1.0f;
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} else {
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this.temperature = temperature;
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}
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this.temperature = 2.0f * this.temperature - 1.0f;
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}
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}
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