Function CreateGLTexture2DArray

test_common/gl/helpers.cpp:149–264

}

void * CreateGLTexture2DArray(size_t width, size_t height, size_t length,
  GLenum target, GLenum glFormat, GLenum internalFormat, GLenum glType,
  ExplicitType type, GLuint *outTextureID, int *outError,
  bool allocateMem, MTdata d)
{
  *outError = 0;

  char * buffer;
  unsigned int size = 0;

  if ( (glType == GL_UNSIGNED_INT_2_10_10_10_REV) || (glType == GL_UNSIGNED_INT_10_10_10_2) )
  {
    size = width * height * length;
  }
  else
  {
    size = width * height * length * 4;
  }

  buffer = (char *)CreateRandomData(type, size, d);

  if( type == kFloat && allocateMem )
  {
    // Re-fill the created buffer to just have [0-1] floats, since that's what it'd expect
    cl_float *p = (cl_float *)buffer;
    for( size_t i = 0; i < size; i++ )
    {
      p[ i ] = (float) genrand_real1( d );
    }
  }
  else if( !allocateMem )
    memset( buffer, 0, size * get_explicit_type_size( type ) );

  glGenTextures( 1, outTextureID );

  glBindTexture( target, *outTextureID );
  glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
  glTexParameteri( target, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
  glTexParameteri( target, GL_TEXTURE_MAG_FILTER, GL_NEAREST );

  glGetError();
  //the default alignment in OpenGL is 4 bytes and need to be changed for GL_DEPTH_COMPONENT16 which is aligned to 2 bytes
  if (internalFormat == GL_DEPTH_COMPONENT16)
    glPixelStorei(GL_UNPACK_ALIGNMENT, get_explicit_type_size( type ));

  glTexImage3D( target, 0, internalFormat, (GLsizei)width, (GLsizei)height,
    (GLsizei)length, 0, glFormat, glType, buffer );

  if (internalFormat == GL_DEPTH_COMPONENT16)
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);

  GLenum err = glGetError();
  if( err != GL_NO_ERROR )
  {
    if (err != GL_OUT_OF_MEMORY) {
        log_error( "ERROR: Unable to load data into GL texture (%s) format %s "
          "type %s internal format %s\n", gluErrorString( err ),
          GetGLFormatName( glFormat ), get_explicit_type_name( type ),