115 lines
3.8 KiB
Java
115 lines
3.8 KiB
Java
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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 01/02/19.
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*/
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@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
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public class CircleFilterRender 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 uCenterHandle = -1;
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private int uRadiusHandle = -1;
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private int uResolutionHandle = -1;
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private float xCenter = 0.5f;
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private float yCenter = 0.5f;
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private float radius = 0.5f;
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public CircleFilterRender() {
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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.circle_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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uCenterHandle = GLES20.glGetUniformLocation(program, "uCenter");
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uRadiusHandle = GLES20.glGetUniformLocation(program, "uRadius");
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uResolutionHandle = GLES20.glGetUniformLocation(program, "uResolution");
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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(uRadiusHandle, radius);
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GLES20.glUniform2f(uCenterHandle, xCenter, yCenter);
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GLES20.glUniform2f(uResolutionHandle, getWidth(), getHeight());
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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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/**
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* @param x in openglview percent (0 to 100)
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* @param y in openglview percent (0 to 100)
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*/
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public void setCenter(float x, float y) {
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xCenter = x / 100;
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yCenter = y / 100;
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}
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/**
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*
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* @param radius in openglview percent (0 to 100)
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*/
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public void setRadius(float radius) {
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this.radius = radius / 100;
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}
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}
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