content: /*
   * Copyright 2013 Hannes Janetzek
   * Copyright 2019 Gustl22
   *
   * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
   *
   * This program is free software: you can redistribute it and/or modify it under the
   * terms of the GNU Lesser General Public License as published by the Free Software
   * Foundation, either version 3 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT ANY
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with
   * this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.oscim.android.gl;
  
  import android.annotation.SuppressLint;
  import android.opengl.GLES20;
  
  import org.oscim.backend.GL;
  
  import java.nio.Buffer;
  import java.nio.FloatBuffer;
  import java.nio.IntBuffer;
  
  /**
   * TODO Unimplemented methods: https://github.com/libgdx/libgdx/blob/master/gdx/jni/android/AndroidGL20.cpp
   */
  @SuppressLint("NewApi")
  public class AndroidGL implements GL {
  
      @Override
      public void attachShader(int program, int shader) {
          GLES20.glAttachShader(program, shader);
      }
  
      @Override
      public void bindAttribLocation(int program, int index, String name) {
          GLES20.glBindAttribLocation(program, index, name);
      }
  
      @Override
      public void bindBuffer(int target, int buffer) {
          GLES20.glBindBuffer(target, buffer);
      }
  
      @Override
      public void bindFramebuffer(int target, int framebuffer) {
          GLES20.glBindFramebuffer(target, framebuffer);
      }
  
      @Override
      public void bindRenderbuffer(int target, int renderbuffer) {
          GLES20.glBindRenderbuffer(target, renderbuffer);
      }
  
      @Override
      public void blendColor(float red, float green, float blue, float alpha) {
          GLES20.glBlendColor(red, green, blue, alpha);
      }
  
      @Override
      public void blendEquation(int mode) {
          GLES20.glBlendEquation(mode);
      }
  
      @Override
      public void blendEquationSeparate(int modeRGB, int modeAlpha) {
          GLES20.glBlendEquationSeparate(modeRGB, modeAlpha);
      }
  
      @Override
      public void blendFuncSeparate(int srcRGB, int dstRGB, int srcAlpha, int dstAlpha) {
          GLES20.glBlendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha);
      }
  
      @Override
      public void bufferData(int target, int size, Buffer data, int usage) {
          GLES20.glBufferData(target, size, data, usage);
      }
  
      @Override
      public void bufferSubData(int target, int offset, int size, Buffer data) {
          GLES20.glBufferSubData(target, offset, size, data);
      }
  
      @Override
      public int checkFramebufferStatus(int target) {
          return GLES20.glCheckFramebufferStatus(target);
      }
  
      @Override
      public void compileShader(int shader) {
          GLES20.glCompileShader(shader);
      }
  
      @Override
      public int createProgram() {
          return GLES20.glCreateProgram();
      }
  
      @Override
      public int createShader(int type) {
          return GLES20.glCreateShader(type);
      }
  
      @Override
      public void deleteBuffer(int buffer) {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void deleteBuffers(int n, IntBuffer buffers) {
          GLES20.glDeleteBuffers(n, buffers);
      }
  
      @Override
      public void deleteFramebuffer(int framebuffer) {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void deleteFramebuffers(int n, IntBuffer framebuffers) {
          GLES20.glDeleteFramebuffers(n, framebuffers);
      }
  
      @Override
      public void deleteProgram(int program) {
          GLES20.glDeleteProgram(program);
      }
  
      @Override
      public void deleteRenderbuffer(int renderbuffer) {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void deleteRenderbuffers(int n, IntBuffer renderbuffers) {
          GLES20.glDeleteRenderbuffers(n, renderbuffers);
      }
  
      @Override
      public void deleteShader(int shader) {
          GLES20.glDeleteShader(shader);
      }
  
      @Override
      public void detachShader(int program, int shader) {
          GLES20.glDetachShader(program, shader);
      }
  
      @Override
      public void disableVertexAttribArray(int index) {
          GLES20.glDisableVertexAttribArray(index);
      }
  
      @Override
      public void drawElements(int mode, int count, int type, int offset) {
          GLES20.glDrawElements(mode, count, type, offset);
      }
  
      @Override
      public void enableVertexAttribArray(int index) {
          GLES20.glEnableVertexAttribArray(index);
      }
  
      @Override
      public void framebufferRenderbuffer(int target, int attachment, int renderbuffertarget,
                                          int renderbuffer) {
          GLES20.glFramebufferRenderbuffer(target, attachment, renderbuffertarget, renderbuffer);
      }
  
      @Override
      public void framebufferTexture2D(int target, int attachment, int textarget, int texture,
                                       int level) {
          GLES20.glFramebufferTexture2D(target, attachment, textarget, texture, level);
      }
  
      @Override
      public int genBuffer() {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void genBuffers(int n, IntBuffer buffers) {
          GLES20.glGenBuffers(n, buffers);
      }
  
      @Override
      public void generateMipmap(int target) {
          GLES20.glGenerateMipmap(target);
      }
  
      @Override
      public int genFramebuffer() {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void genFramebuffers(int n, IntBuffer framebuffers) {
          GLES20.glGenFramebuffers(n, framebuffers);
      }
  
      @Override
      public int genRenderbuffer() {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void genRenderbuffers(int n, IntBuffer renderbuffers) {
          GLES20.glGenRenderbuffers(n, renderbuffers);
      }
  
      @Override
      public String getActiveAttrib(int program, int index, IntBuffer size, Buffer type) {
          return GLES20.glGetActiveAttrib(program, index, size, (IntBuffer) type);
      }
  
      @Override
      public String getActiveUniform(int program, int index, IntBuffer size, Buffer type) {
          //return GLES20.glGetActiveUniform(program, index, bufsize, length, size, type, name);
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void getAttachedShaders(int program, int maxcount, Buffer count, IntBuffer shaders) {
          throw new UnsupportedOperationException("missing implementation");
          //GLES20.glGetAttachedShaders(program, maxcount, count, shaders);
      }
  
      @Override
      public int getAttribLocation(int program, String name) {
          return GLES20.glGetAttribLocation(program, name);
      }
  
      @Override
      public void getBooleanv(int pname, Buffer params) {
          throw new UnsupportedOperationException("missing implementation");
          //GLES20.glGetBooleanv(pname, params);
      }
  
      @Override
      public void getBufferParameteriv(int target, int pname, IntBuffer params) {
          GLES20.glGetBufferParameteriv(target, pname, params);
  
      }
  
      @Override
      public void getFloatv(int pname, FloatBuffer params) {
          GLES20.glGetFloatv(pname, params);
  
      }
  
      @Override
      public void getFramebufferAttachmentParameteriv(int target, int attachment, int pname,
                                                      IntBuffer params) {
          GLES20.glGetFramebufferAttachmentParameteriv(target, attachment, pname, params);
      }
  
      @Override
      public void getProgramiv(int program, int pname, IntBuffer params) {
          GLES20.glGetProgramiv(program, pname, params);
  
      }
  
      @Override
      public String getProgramInfoLog(int program) {
          return GLES20.glGetProgramInfoLog(program);
      }
  
      @Override
      public void getRenderbufferParameteriv(int target, int pname, IntBuffer params) {
          GLES20.glGetRenderbufferParameteriv(target, pname, params);
  
      }
  
      @Override
      public void getShaderiv(int shader, int pname, IntBuffer params) {
          GLES20.glGetShaderiv(shader, pname, params);
  
      }
  
      @Override
      public String getShaderInfoLog(int shader) {
          return GLES20.glGetShaderInfoLog(shader);
      }
  
      @Override
      public void getShaderPrecisionFormat(int shadertype, int precisiontype, IntBuffer range,
                                           IntBuffer precision) {
          GLES20.glGetShaderPrecisionFormat(shadertype, precisiontype, range, precision);
      }
  
      @Override
      public void getTexParameterfv(int target, int pname, FloatBuffer params) {
          GLES20.glGetTexParameterfv(target, pname, params);
  
      }
  
      @Override
      public void getTexParameteriv(int target, int pname, IntBuffer params) {
          GLES20.glGetTexParameteriv(target, pname, params);
  
      }
  
      @Override
      public void getUniformfv(int program, int location, FloatBuffer params) {
          GLES20.glGetUniformfv(program, location, params);
  
      }
  
      @Override
      public void getUniformiv(int program, int location, IntBuffer params) {
          GLES20.glGetUniformiv(program, location, params);
  
      }
  
      @Override
      public int getUniformLocation(int program, String name) {
          return GLES20.glGetUniformLocation(program, name);
      }
  
      @Override
      public void getVertexAttribfv(int index, int pname, FloatBuffer params) {
          GLES20.glGetVertexAttribfv(index, pname, params);
  
      }
  
      @Override
      public void getVertexAttribiv(int index, int pname, IntBuffer params) {
          GLES20.glGetVertexAttribiv(index, pname, params);
  
      }
  
      @Override
      public void getVertexAttribPointerv(int index, int pname, Buffer pointer) {
          //GLES20.glGetVertexAttribPointerv(index, pname, pointer);
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public boolean isBuffer(int buffer) {
          return GLES20.glIsBuffer(buffer);
      }
  
      @Override
      public boolean isEnabled(int cap) {
          return GLES20.glIsEnabled(cap);
      }
  
      @Override
      public boolean isFramebuffer(int framebuffer) {
          return GLES20.glIsFramebuffer(framebuffer);
      }
  
      @Override
      public boolean isProgram(int program) {
          return GLES20.glIsProgram(program);
      }
  
      @Override
      public boolean isRenderbuffer(int renderbuffer) {
          return GLES20.glIsRenderbuffer(renderbuffer);
      }
  
      @Override
      public boolean isShader(int shader) {
          return GLES20.glIsShader(shader);
      }
  
      @Override
      public boolean isTexture(int texture) {
          return GLES20.glIsTexture(texture);
      }
  
      @Override
      public void linkProgram(int program) {
          GLES20.glLinkProgram(program);
  
      }
  
      @Override
      public void releaseShaderCompiler() {
          GLES20.glReleaseShaderCompiler();
  
      }
  
      @Override
      public void renderbufferStorage(int target, int internalformat, int width, int height) {
          GLES20.glRenderbufferStorage(target, internalformat, width, height);
  
      }
  
      @Override
      public void sampleCoverage(float value, boolean invert) {
          GLES20.glSampleCoverage(value, invert);
  
      }
  
      @Override
      public void shaderBinary(int n, IntBuffer shaders, int binaryformat, Buffer binary, int length) {
          GLES20.glShaderBinary(n, shaders, binaryformat, binary, length);
  
      }
  
      @Override
      public void shaderSource(int shader, String string) {
          GLES20.glShaderSource(shader, string);
  
      }
  
      @Override
      public void stencilFuncSeparate(int face, int func, int ref, int mask) {
          GLES20.glStencilFuncSeparate(face, func, ref, mask);
  
      }
  
      @Override
      public void stencilMaskSeparate(int face, int mask) {
          GLES20.glStencilMaskSeparate(face, mask);
  
      }
  
      @Override
      public void stencilOpSeparate(int face, int fail, int zfail, int zpass) {
          GLES20.glStencilOpSeparate(face, fail, zfail, zpass);
  
      }
  
      @Override
      public void texParameterfv(int target, int pname, FloatBuffer params) {
          GLES20.glTexParameterfv(target, pname, params);
  
      }
  
      @Override
      public void texParameteri(int target, int pname, int param) {
          GLES20.glTexParameteri(target, pname, param);
  
      }
  
      @Override
      public void texParameteriv(int target, int pname, IntBuffer params) {
          GLES20.glTexParameteriv(target, pname, params);
  
      }
  
      @Override
      public void uniform1f(int location, float x) {
          GLES20.glUniform1f(location, x);
  
      }
  
      @Override
      public void uniform1fv(int location, int count, FloatBuffer v) {
          GLES20.glUniform1fv(location, count, v);
  
      }
  
      @Override
      public void uniform1fv(int location, int count, float[] v, int offset) {
          GLES20.glUniform1fv(location, count, v, offset);
      }
  
      @Override
      public void uniform1i(int location, int x) {
          GLES20.glUniform1i(location, x);
  
      }
  
      @Override
      public void uniform1iv(int location, int count, IntBuffer v) {
          GLES20.glUniform1iv(location, count, v);
  
      }
  
      @Override
      public void uniform1iv(int location, int count, int[] v, int offset) {
          GLES20.glUniform1iv(location, count, v, offset);
      }
  
      @Override
      public void uniform2f(int location, float x, float y) {
          GLES20.glUniform2f(location, x, y);
  
      }
  
      @Override
      public void uniform2fv(int location, int count, FloatBuffer v) {
          GLES20.glUniform2fv(location, count, v);
  
      }
  
      @Override
      public void uniform2fv(int location, int count, float[] v, int offset) {
          GLES20.glUniform2fv(location, count, v, offset);
      }
  
      @Override
      public void uniform2i(int location, int x, int y) {
          GLES20.glUniform2i(location, x, y);
  
      }
  
      @Override
      public void uniform2iv(int location, int count, IntBuffer v) {
          GLES20.glUniform2iv(location, count, v);
  
      }
  
      @Override
      public void uniform2iv(int location, int count, int[] v, int offset) {
          GLES20.glUniform2iv(location, count, v, offset);
      }
  
      @Override
      public void uniform3f(int location, float x, float y, float z) {
          GLES20.glUniform3f(location, x, y, z);
  
      }
  
      @Override
      public void uniform3fv(int location, int count, FloatBuffer v) {
          GLES20.glUniform3fv(location, count, v);
  
      }
  
      @Override
      public void uniform3fv(int location, int count, float[] v, int offset) {
          GLES20.glUniform3fv(location, count, v, offset);
      }
  
      @Override
      public void uniform3i(int location, int x, int y, int z) {
          GLES20.glUniform3i(location, x, y, z);
  
      }
  
      @Override
      public void uniform3iv(int location, int count, IntBuffer v) {
          GLES20.glUniform3iv(location, count, v);
  
      }
  
      @Override
      public void uniform3iv(int location, int count, int[] v, int offset) {
          GLES20.glUniform3iv(location, count, v, offset);
      }
  
      @Override
      public void uniform4f(int location, float x, float y, float z, float w) {
          GLES20.glUniform4f(location, x, y, z, w);
      }
  
      @Override
      public void uniform4fv(int location, int count, FloatBuffer v) {
          GLES20.glUniform4fv(location, count, v);
      }
  
      @Override
      public void uniform4fv(int location, int count, float[] v, int offset) {
          GLES20.glUniform4fv(location, count, v, offset);
      }
  
      @Override
      public void uniform4i(int location, int x, int y, int z, int w) {
          GLES20.glUniform4i(location, x, y, z, w);
  
      }
  
      @Override
      public void uniform4iv(int location, int count, IntBuffer v) {
          GLES20.glUniform4iv(location, count, v);
  
      }
  
      @Override
      public void uniform4iv(int location, int count, int[] v, int offset) {
          GLES20.glUniform4iv(location, count, v, offset);
      }
  
      @Override
      public void uniformMatrix2fv(int location, int count, boolean transpose, FloatBuffer value) {
          GLES20.glUniformMatrix2fv(location, count, transpose, value);
  
      }
  
      @Override
      public void uniformMatrix2fv(int location, int count, boolean transpose, float[] value, int offset) {
          GLES20.glUniformMatrix2fv(location, count, transpose, value, offset);
      }
  
      @Override
      public void uniformMatrix3fv(int location, int count, boolean transpose, FloatBuffer value) {
          GLES20.glUniformMatrix3fv(location, count, transpose, value);
  
      }
  
      @Override
      public void uniformMatrix3fv(int location, int count, boolean transpose, float[] value, int offset) {
          GLES20.glUniformMatrix3fv(location, count, transpose, value, offset);
      }
  
      @Override
      public void uniformMatrix4fv(int location, int count, boolean transpose, FloatBuffer value) {
          GLES20.glUniformMatrix4fv(location, count, transpose, value);
  
      }
  
      @Override
      public void uniformMatrix4fv(int location, int count, boolean transpose, float[] value, int offset) {
          GLES20.glUniformMatrix4fv(location, count, transpose, value, offset);
      }
  
      @Override
      public void useProgram(int program) {
          GLES20.glUseProgram(program);
  
      }
  
      @Override
      public void validateProgram(int program) {
          GLES20.glValidateProgram(program);
  
      }
  
      @Override
      public void vertexAttrib1f(int indx, float x) {
          GLES20.glVertexAttrib1f(indx, x);
  
      }
  
      @Override
      public void vertexAttrib1fv(int indx, FloatBuffer values) {
          GLES20.glVertexAttrib1fv(indx, values);
  
      }
  
      @Override
      public void vertexAttrib2f(int indx, float x, float y) {
          GLES20.glVertexAttrib2f(indx, x, y);
  
      }
  
      @Override
      public void vertexAttrib2fv(int indx, FloatBuffer values) {
          GLES20.glVertexAttrib2fv(indx, values);
  
      }
  
      @Override
      public void vertexAttrib3f(int indx, float x, float y, float z) {
          GLES20.glVertexAttrib3f(indx, x, y, z);
  
      }
  
      @Override
      public void vertexAttrib3fv(int indx, FloatBuffer values) {
          GLES20.glVertexAttrib3fv(indx, values);
  
      }
  
      @Override
      public void vertexAttrib4f(int indx, float x, float y, float z, float w) {
          GLES20.glVertexAttrib4f(indx, x, y, z, w);
  
      }
  
      @Override
      public void vertexAttrib4fv(int indx, FloatBuffer values) {
          GLES20.glVertexAttrib4fv(indx, values);
  
      }
  
      @Override
      public void vertexAttribPointer(int indx, int size, int type, boolean normalized, int stride,
                                      Buffer ptr) {
          GLES20.glVertexAttribPointer(indx, size, type, normalized, stride, ptr);
      }
  
      @Override
      public void vertexAttribPointer(int indx, int size, int type, boolean normalized, int stride,
                                      int offset) {
          // FIXME check implementation!
          GLES20.glVertexAttribPointer(indx, size, type, normalized, stride, offset);
          //throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void activeTexture(int texture) {
          GLES20.glActiveTexture(texture);
  
      }
  
      @Override
      public void bindTexture(int target, int texture) {
          GLES20.glBindTexture(target, texture);
  
      }
  
      @Override
      public void blendFunc(int sfactor, int dfactor) {
          GLES20.glBlendFunc(sfactor, dfactor);
  
      }
  
      @Override
      public void clear(int mask) {
          GLES20.glClear(mask);
  
      }
  
      @Override
      public void clearColor(float red, float green, float blue, float alpha) {
          GLES20.glClearColor(red, green, blue, alpha);
  
      }
  
      @Override
      public void clearDepthf(float depth) {
          GLES20.glClearDepthf(depth);
  
      }
  
      @Override
      public void clearStencil(int s) {
          GLES20.glClearStencil(s);
  
      }
  
      @Override
      public void colorMask(boolean red, boolean green, boolean blue, boolean alpha) {
          GLES20.glColorMask(red, green, blue, alpha);
  
      }
  
      @Override
      public void compressedTexImage2D(int target, int level, int internalformat, int width,
                                       int height, int border, int imageSize, Buffer data) {
          throw new UnsupportedOperationException("missing implementation");
  
      }
  
      @Override
      public void compressedTexSubImage2D(int target, int level, int xoffset, int yoffset,
                                          int width, int height, int format, int imageSize, Buffer data) {
          throw new UnsupportedOperationException("missing implementation");
  
      }
  
      @Override
      public void copyTexImage2D(int target, int level, int internalformat, int x, int y,
                                 int width, int height, int border) {
          GLES20.glCopyTexImage2D(target, level, internalformat, x, y, width, height, border);
      }
  
      @Override
      public void copyTexSubImage2D(int target, int level, int xoffset, int yoffset, int x, int y,
                                    int width, int height) {
          GLES20.glCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
      }
  
      @Override
      public void cullFace(int mode) {
          GLES20.glCullFace(mode);
  
      }
  
      @Override
      public void deleteTextures(int n, IntBuffer textures) {
          GLES20.glDeleteTextures(n, textures);
  
      }
  
      @Override
      public void deleteTexture(int texture) {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public void depthFunc(int func) {
          GLES20.glDepthFunc(func);
  
      }
  
      @Override
      public void depthMask(boolean flag) {
          GLES20.glDepthMask(flag);
  
      }
  
      @Override
      public void depthRangef(float zNear, float zFar) {
          GLES20.glDepthRangef(zNear, zFar);
  
      }
  
      @Override
      public void disable(int cap) {
          GLES20.glDisable(cap);
  
      }
  
      @Override
      public void drawArrays(int mode, int first, int count) {
          GLES20.glDrawArrays(mode, first, count);
  
      }
  
      @Override
      public void drawElements(int mode, int count, int type, Buffer indices) {
          GLES20.glDrawElements(mode, count, type, indices);
  
      }
  
      @Override
      public void enable(int cap) {
          GLES20.glEnable(cap);
  
      }
  
      @Override
      public void finish() {
          GLES20.glFinish();
  
      }
  
      @Override
      public void flush() {
          GLES20.glFlush();
  
      }
  
      @Override
      public void frontFace(int mode) {
          GLES20.glFrontFace(mode);
  
      }
  
      @Override
      public void genTextures(int n, IntBuffer textures) {
          GLES20.glGenTextures(n, textures);
  
      }
  
      @Override
      public int genTexture() {
          throw new UnsupportedOperationException("missing implementation");
      }
  
      @Override
      public int getError() {
          return GLES20.glGetError();
      }
  
      @Override
      public void getIntegerv(int pname, IntBuffer params) {
          GLES20.glGetIntegerv(pname, params);
  
      }
  
      @Override
      public String getString(int name) {
          return GLES20.glGetString(name);
      }
  
      @Override
      public void hint(int target, int mode) {
          GLES20.glHint(target, mode);
      }
  
      @Override
      public void lineWidth(float width) {
          GLES20.glLineWidth(width);
  
      }
  
      @Override
      public void pixelStorei(int pname, int param) {
          GLES20.glPixelStorei(pname, param);
  
      }
  
      @Override
      public void polygonOffset(float factor, float units) {
          GLES20.glPolygonOffset(factor, units);
  
      }
  
      @Override
      public void readPixels(int x, int y, int width, int height, int format, int type,
                             Buffer pixels) {
          GLES20.glReadPixels(x, y, width, height, format, type, pixels);
      }
  
      @Override
      public void scissor(int x, int y, int width, int height) {
          GLES20.glScissor(x, y, width, height);
      }
  
      @Override
      public void stencilFunc(int func, int ref, int mask) {
          GLES20.glStencilFunc(func, ref, mask);
      }
  
      @Override
      public void stencilMask(int mask) {
          GLES20.glStencilMask(mask);
      }
  
      @Override
      public void stencilOp(int fail, int zfail, int zpass) {
          GLES20.glStencilOp(fail, zfail, zpass);
      }
  
      @Override
      public void texImage2D(int target, int level, int internalformat, int width, int height,
                             int border, int format, int type, Buffer pixels) {
          GLES20.glTexImage2D(target, level, internalformat, width, height, border, format, type,
                  pixels);
      }
  
      @Override
      public void texParameterf(int target, int pname, float param) {
          GLES20.glTexParameterf(target, pname, param);
      }
  
      @Override
      public void texSubImage2D(int target, int level, int xoffset, int yoffset, int width,
                                int height, int format, int type, Buffer pixels) {
          GLES20.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixels);
  
      }
  
      @Override
      public void viewport(int x, int y, int width, int height) {
          GLES20.glViewport(x, y, width, height);
      }
  
  }
  