使用OpenGL ES以双目渲染和显示360度视频。博文地址：http://www.tamarous.com/2017/12/23/render-360-video-using-opengles/

GLHelper.h

#ifndef GLHELPER_H
#define GLHELPER_H

#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <vector>
#include <pthread.h>
#include "MyGLCamera.h"

struct FramebufferDesc {
    // Depth Buffer Index used to represent depth component.
    GLuint m_nDepthBufferID;
    // Render Buffer Index used to represent color component.
    GLuint m_nRenderTextureID;
    // FrameBuffer object Index used to represent framebuffer object.
    GLuint m_nRenderFramebufferID;
};

enum EYE {
    LEFT_EYE = 0,
    RIGHT_EYE = 1
};

class GLHelper {
public:
    GLHelper();
    ~GLHelper();
    bool init();
    void setWindow(ANativeWindow *window);
    void drawFrame(int frameWidth, int frameHeight, unsigned char *YData, unsigned char *UData,
                   unsigned char *VData);
    void setRotationMatrix(float *rotation, int length);
private:
    ANativeWindow *_window;

    // Display
    EGLint w = 0;
    EGLint h = 0;
    EGLDisplay dpy;
    EGLSurface surface;
    EGLContext context;

    // OpenGL
    GLuint gProgram;
    unsigned int vertexCount;
    int numberOfPatches;
    float *vertexCoordinates;
    float *uvCoordinates;

    // Camera
    float FOVY = 60.0f;
    float zNear = 0.1f;
    float zFar = 20.0f;

    GLuint sphereProgram;

    // program used to draw half of screen
    GLuint leftScreenProgram;
    GLuint rightScreenProgram;

    // pointers to indicate where the sphere data is.
    GLuint gSpherePositionAttribPointer;
    GLuint gSphereSamplerAttribPointer;
    GLuint gSphereMatrixUniformPointer;

    // pointers to indicate where the plane data is.
    GLuint gLeftScreenPositionAttribPointer;
    GLuint gRightScreenPositionAttribPointer;
    GLuint gLeftScreenSamplerAttribPointer;
    GLuint gRightScreenSamplerAttribPointer;

    // FramebufferDesc struct for left and right eye.
    FramebufferDesc leftEyeFrameBufferDesc;
    FramebufferDesc rightEyeFrameBufferDesc;

    MyGLCamera *myCamera;

    bool setupMemories();
    bool setupGraphics();
    bool setupTextures();
    bool setupVertices();
    bool setupMatrix();
    bool setupFrameBuffer(int screenWidth, int screenHeight, FramebufferDesc &framebufferDesc);
    void renderToTexture(int yuvFrameWidth, int yuvFrameHeight, unsigned char *YData, unsigned char *UData,
                         unsigned char *VData, EYE eye);
    void renderToScreen();
    void close();
} ;

#endif