Distorted Android

///////////////////////////////////////////////////////////////////////////////////////////////////

// modify it under the terms of the GNU Lesser General Public                                    //

// License as published by the Free Software Foundation; either                                  //

// version 2.1 of the License, or (at your option) any later version.                            //

// Lesser General Public License for more details.                                               //

// License along with this library; if not, write to the Free Software                           //

// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA                //

package org.distorted.library.program;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * An object which encapsulates a vertex/fragment shader combo, aka Shader Program.

 */

public class DistortedProgram

  {

  private int mAttributeLen, mUniformLen;

    {

    if (programHandle != 0)

      {

      GLES30.glAttachShader(programHandle, fragmentShaderHandle);

        {

        {

        final int size = attributes.length;

        }

      final int[] linkStatus = new int[1];

        GLES30.glDeleteProgram(programHandle);

        }

      final int[] numberOfUniforms = new int[1];

      //android.util.Log.d("program", "number of active uniforms="+numberOfUniforms[0]);

      }

    return programHandle;

    }

  private void init(int glslVersion)

    {

    mAttributeStr  = (glslVersion == 100 ? "attribute " : "in ");

    mAttributeLen  = mAttributeStr.length();

    mNumAttributes = 0;

    mUniformStr    = "uniform ";

    mUniformLen    = mUniformStr.length();

    mNumUniforms   = 0;

    mUniList       = "";

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private String parseOutUniform(final String line)

    {

    int len = line.length();

    int whiteSpace, semicolon, nameBegin;

    char currChar;

    for(whiteSpace=0; whiteSpace<len; whiteSpace++)

      {

      currChar = line.charAt(whiteSpace);

      if( currChar!=' ' && currChar!='\t') break;

      }

    for(semicolon=whiteSpace; semicolon<len; semicolon++)

      {

      currChar = line.charAt(semicolon);

      if( currChar==';') break;

      }

    if( semicolon<len && semicolon-whiteSpace>=mUniformLen+1 )

      {

      String subline = line.substring(whiteSpace,semicolon);

      int subLen = semicolon-whiteSpace;

      if( subline.startsWith(mUniformStr))

        {

        //android.util.Log.e("program", "GOOD LINE: " +subline+" subLen="+subLen);

        for(nameBegin=subLen-1; nameBegin>mUniformLen-2; nameBegin--)

          {

          currChar=subline.charAt(nameBegin);

          if( currChar==' ' || currChar=='\t' )

            {

            mNumUniforms++;

            String uniform = subline.substring(nameBegin+1,subLen);

            int brace = uniform.indexOf("[");

            return brace>=0 ? uniform.substring(0,brace) : uniform;

            }

          }

        }

      }

    return null;

    }

    int len = line.length();

    int whiteSpace, semicolon, nameBegin;

    char currChar;

    for(whiteSpace=0; whiteSpace<len; whiteSpace++)

      {

      currChar = line.charAt(whiteSpace);

      if( currChar!=' ' && currChar!='\t') break;

      }

    for(semicolon=whiteSpace; semicolon<len; semicolon++)

      {

      currChar = line.charAt(semicolon);

      if( currChar==';') break;

      }

      String subline = line.substring(whiteSpace,semicolon);

      int subLen = semicolon-whiteSpace;

          currChar=subline.charAt(nameBegin);

          if( currChar==' ' || currChar=='\t' )

            {

            mNumAttributes++;

          }

        }

      }

    return null;

  private void doAttributes(final String shader, boolean doAttributes)

    {

    String attribute, attrList="", uniform;

    String[] lines = shader.split("\n");

          }

        }

        }

      }

    if( doAttributes ) mAttributeName = attrList.split(" ");

    }

  private String readTextFileFromRawResource(final InputStream inputStream, boolean doAttributes)

    {

    final InputStreamReader inputStreamReader = new InputStreamReader(inputStream);

    final BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

    try

      {

      while ((nextLine = bufferedReader.readLine()) != null)

        {

        body.append(nextLine);

        body.append('\n');

          {

          attribute = parseOutAttribute(nextLine);

          if( attribute!=null )

            {

            //android.util.Log.d("program", "new attribute: "+attribute);

            if( attrList.length()>0 ) attrList+=" ";

            attrList += attribute;

            }

          }

      }

    catch (IOException e)

      {

      return null;

      }

    return body.toString();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private static int compileShader(final int shaderType, final String shaderSource)

  throws FragmentCompilationException,VertexCompilationException

    {

    if (shaderHandle != 0)

      {

      GLES30.glCompileShader(shaderHandle);

          {

          case GLES30.GL_FRAGMENT_SHADER: throw new FragmentCompilationException(error);

          }

      }

    return shaderHandle;

    }

  private static String insertEnabledEffects(String code, final String effects)

    {

    final String marker = "// ENABLED EFFECTS WILL BE INSERTED HERE";

    int length = marker.length();

    int place = code.indexOf(marker);

    if( place>=0 )

      {

      String begin = code.substring(0,place-1);

      String end   = code.substring(place+length);

      return begin + effects + end;

      }

    else

      {

      android.util.Log.e("Program", "Error: marker string not found in SHADER!");

      }

    return null;

    }

    {

    for(int i=0; i<mNumAttributes; i++)

      {

    for(int i=0; i<mNumAttributes; i++)

      {

      if( mAttribute[i] < 0 )

        {

        emptyAttrs++;

        for(int j=i; j<mNumAttributes-1; j++)

          {

          mAttribute[j] = mAttribute[j+1];

          mAttributeName[j] = mAttributeName[j+1];

          }

        }

      }

    mNumAttributes -= emptyAttrs;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private void setUpUniforms()

    {

      {

      mUniform = new int[mNumUniforms];

      for(int i=0; i<mNumUniforms; i++)

        {

      }

    else mUniform = null;

    }

/**

 * Only for use by the library itself.

 *

 * @y.exclude

 */

  public DistortedProgram(final InputStream vert, final InputStream frag, final String vertHeader, final String fragHeader,

                          int glslVersion, final String[] feedback )

  throws FragmentCompilationException,VertexCompilationException,LinkingException

    {

    init(glslVersion);

    final String vertShader = readTextFileFromRawResource(vert, true );

    final String fragShader = readTextFileFromRawResource(frag, false);

    final int vertShaderHandle = compileShader(GLES30.GL_VERTEX_SHADER  , vertHeader + vertShader);

    final int fragShaderHandle = compileShader(GLES30.GL_FRAGMENT_SHADER, fragHeader + fragShader);

    mProgramHandle = createAndLinkProgram(vertShaderHandle, fragShaderHandle, mAttributeName, glslVersion>= 300 ? feedback:null );

    setUpAttributes();

    setUpUniforms();

    }

 * Only for use by the library itself.

 *

 * @y.exclude

 */

                          final String enabledVert, final String enabledFrag, int glslVersion, final String[] feedback )

  throws FragmentCompilationException,VertexCompilationException,LinkingException

    String fragShader = readTextFileFromRawResource( frag, false);

    if( enabledFrag!=null ) fragShader = insertEnabledEffects(fragShader,enabledFrag);

    final int fragShaderHandle = compileShader(GLES30.GL_FRAGMENT_SHADER, fragHeader + fragShader);

    setUpUniforms();

///////////////////////////////////////////////////////////////////////////////////////////////////

 * Only for use by the library itself.

 *

 * @y.exclude

 */

  public DistortedProgram(final InputStream vertex, final InputStream fragment, final String vertexHeader, final String fragmentHeader, int glslVersion )

    }

// PUBLIC API

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Create a new Shader Program from two source strings.

 * <p>

 * Needs to be called from a thread holding the OpenGL context.

 *

 * @param vertex   Vertex shader code.

 * @param fragment Fragment shader code.

 * @throws VertexCompilationException vertex shader failed to compile

 * @throws LinkingException shaders failed to link

  public DistortedProgram(final String vertex, final String fragment)

    init(300);

    doAttributes(fragment, false);

    final int fragmentShaderHandle = compileShader(GLES30.GL_FRAGMENT_SHADER, fragment);

    setUpUniforms();

///////////////////////////////////////////////////////////////////////////////////////////////////

 * Return the handle of the created program so that we can later, say, call glUseProgram.

 */

    {

    return mProgramHandle;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

 *

 */

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Disable all vertex attribute arrays.

 *

 * Needs to be called from a thread holding the OpenGL context.

 */

  public void stopUsingProgram()

    {

    GLES30.glUseProgram(0);

    for(int i=0; i<mNumAttributes; i++)

      {

      GLES30.glDisableVertexAttribArray(mAttribute[i]);

      }

  }