62 lines
2.4 KiB
Java
62 lines
2.4 KiB
Java
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package com.pedro.encoder.utils.gl;
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import android.graphics.PointF;
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import android.opengl.GLES20;
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import android.opengl.Matrix;
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/**
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* Created by pedro on 22/03/19.
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*/
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public class SizeCalculator {
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public static void calculateViewPort(boolean keepAspectRatio, int mode, int previewWidth,
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int previewHeight, int streamWidth, int streamHeight) {
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if (keepAspectRatio) {
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if (previewWidth > previewHeight) { //landscape
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if (mode == 0) { //adjust
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int realWidth = previewHeight * streamWidth / streamHeight;
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GLES20.glViewport((previewWidth - realWidth) / 2, 0, realWidth, previewHeight);
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} else { //fill
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int realHeight = previewWidth * streamHeight / streamWidth;
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GLES20.glViewport(0, -((realHeight - previewWidth) / 2), previewWidth, realHeight);
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}
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} else { //portrait
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if (mode == 0) { //adjust
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int realHeight = previewWidth * streamHeight / streamWidth;
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GLES20.glViewport(0, (previewHeight - realHeight) / 2, previewWidth, realHeight);
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} else { //fill
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int realWidth = previewHeight * streamWidth / streamHeight;
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GLES20.glViewport(-((realWidth - previewWidth) / 2), 0, realWidth, previewHeight);
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}
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}
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} else {
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GLES20.glViewport(0, 0, previewHeight, previewWidth);
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}
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}
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public static void updateMatrix(int rotation, int width, int height, boolean isPreview,
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boolean isPortrait, float[] MVPMatrix) {
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Matrix.setIdentityM(MVPMatrix, 0);
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PointF scale = getScale(rotation, width, height, isPortrait, isPreview);
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Matrix.scaleM(MVPMatrix, 0, scale.x, scale.y, 1f);
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if (!isPreview && !isPortrait) rotation += 90;
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Matrix.rotateM(MVPMatrix, 0, rotation, 0f, 0f, -1f);
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}
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private static PointF getScale(int rotation, int width, int height, boolean isPortrait,
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boolean isPreview) {
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float scaleX = 1f;
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float scaleY = 1f;
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if (!isPreview) {
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if (isPortrait && rotation != 90 && rotation != 270) { //portrait
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final float adjustedWidth = width * (width / (float) height);
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scaleX = adjustedWidth / height;
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//} else if (!isPortrait && rotation != 90 && rotation != 270) { //landscape
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// final float adjustedWidth = height * (height / (float) width);
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// scaleX = adjustedWidth / width;
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}
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}
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return new PointF(scaleX, scaleY);
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}
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}
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