Acme-MITHALDU-BleedingOpenGL

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pogl_gl_top.xs  view on Meta::CPAN

/********************/
/* GPGPU Utils      */
/********************/

GLint FBO_MAX = -1;

/* Get max GPGPU data size */
int gpgpu_size(void)
{
#if defined(GL_ARB_texture_rectangle) && defined(GL_ARB_texture_float) && \
  defined(GL_ARB_fragment_program) && defined(GL_EXT_framebuffer_object)
  if (FBO_MAX == -1)
  {
    if (testProc(glProgramStringARB,"glProgramStringARB") &&
      testProc(glGenProgramsARB,"glGenProgramsARB") &&
      testProc(glBindProgramARB,"glBindProgramARB") &&
      testProc(glIsProgramARB,"glIsProgramARB") &&
      testProc(glProgramLocalParameter4fvARB,"glProgramLocalParameter4fvARB") &&

pogl_gl_top.xs  view on Meta::CPAN

      FBO_MAX = 0;
    }
  }
  return(FBO_MAX);
#else
  return(0);
#endif
}

/* Get max square array width for a given GPGPU data size */
int gpgpu_width(int len)
{
  int max = gpgpu_size();
  if (max && len && !(len%3))
  {
    int count = len / 3;
    int w = (int)sqrt(count);

    while ((w <= count) && (w <= max))
    {
      if (!(count%w)) return(w);
      w++;
    }

pogl_gl_top.xs  view on Meta::CPAN

#endif /* defined HAVE_GLUT or HAVE_FREEGLUT */
	}
	OUTPUT:
		RETVAL


#//# glpHasGPGPU();
int
glpHasGPGPU()
	CODE:
		RETVAL = gpgpu_size();
	OUTPUT:
		RETVAL

#endif /* End IN_POGL_GLX_XS */

pogl_rpn.xs  view on Meta::CPAN

		/* Grab affine matrix */
		if (!mat)
		{
			mat = malloc(sizeof(GLfloat) * count);
			for (i=0; i<count; i++)
				mat[i] = (GLfloat)SvNV(ST(i+1));
		}
#if 0 /* Need to figure out why this is slower than CPU calcs */ 
		/* Use GPU if FBOs and Fragment Programs are supported */
		fbo_width = gpgpu_width(len);
		if (dim == 4 && fbo_width)
		{
			GLuint target = GL_TEXTURE_RECTANGLE_ARB;
			int w = fbo_width;
			int h = len / (w*3);

			/* Setup and enable FBO */
			enable_fbo(oga,w,h,target,GL_RGB32F_ARB,GL_RGB,GL_FLOAT);

			/* Pass affine matrix to shader */