void gl_draw(float *r, float *g, float *b, float *u, float *v) {

	int i, j;
	float x, y, h, d00, d01, d10, d11;

	int dd00, dd01, dd10, dd11;

	h = 1.0f/M;

	glViewport ( 0, 0, XSIZE, YSIZE );
	glMatrixMode ( GL_PROJECTION );
	glLoadIdentity ();

	glOrtho(0.0f, 1.0, 1.0, 0.0f, -1.0f, 1.0f);

	glClearColor ( 0.0f, 0.0f, 0.0f, 1.0f );
	glClear ( GL_COLOR_BUFFER_BIT );

	glBegin ( GL_QUADS );

		for ( i=0 ; i<=N ; i++ ) {
			x = (i-0.5f)*h;
			for ( j=0 ; j<=M ; j++ ) {
				y = (j-0.5f)*h;

				//h = 8;

				dd00 = IX(i,j);
				dd01 = IX(i,j+1);
				dd10 = IX(i+1,j);
				dd11 = IX(i+1,j+1);
				//x = 100; y = 200; h = 20;
				glColor3f ( r[dd00], g[dd00], b[dd00] ); glVertex2f ( x, y );
				glColor3f ( r[dd10], g[dd10], b[dd10] ); glVertex2f ( x+h, y );
				glColor3f ( r[dd11], g[dd11], b[dd11] ); glVertex2f ( x+h, y+h );
				glColor3f ( r[dd01], g[dd01], b[dd01] ); glVertex2f ( x, y+h );

				//fprintf(stderr, "%.4f, %.4f, %.4f - ",  r[dd00], g[dd00], b[dd00]);
				/*
				glColor3f ( r[dd00], g[dd00], b[dd00] ); glVertex2f ( x, y );
				glColor3f ( r[dd10], g[dd10], b[dd10] ); glVertex2f ( x+h, y );
				glColor3f ( r[dd11], g[dd11], b[dd11] ); glVertex2f ( x+h, y+h );
				glColor3f ( r[dd01], g[dd01], b[dd01] ); glVertex2f ( x, y+h );
				*/


			}
		}

	glEnd ();




//draw texture


  glMatrixMode( GL_MODELVIEW );
  glLoadIdentity();

 glEnable( GL_TEXTURE_2D );
 glBindTexture( GL_TEXTURE_2D, texture );


//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);



glBegin( GL_QUADS );
	//Bottom-left vertex (corner)
	glTexCoord2i( 0, 0 );
	glVertex3f( mousex, mousey, 0.0f);

	//Bottom-right vertex (corner)
	glTexCoord2i( 1, 0 );
	//glVertex3f( 228.f, 100.f, 0.f );
	glVertex3f( mousex + 128, mousey, 0.f );


	//Top-right vertex (corner)
	glTexCoord2i( 1, 1 );
	glVertex3f( mousex + 128, mousey + 128, 0.f );

	//Top-left vertex (corner)
	glTexCoord2i( 0, 1 );
	glVertex3f( mousex, mousey + 128, 0.f );
  glEnd();

  glDisable(GL_TEXTURE_2D);

SDL_GL_SwapBuffers();

}