1.1 --- a/src/drivers/gl_fbo.c	Fri Sep 12 05:36:00 2008 +0000
     1.2 +++ b/src/drivers/gl_fbo.c	Sun Sep 28 01:09:51 2008 +0000
     1.3 @@ -58,6 +58,7 @@
     1.4  };
     1.5  
     1.6  static GLint gl_fbo_max_attachments = 0;
     1.7 +static gboolean gl_fbo_have_packed_stencil = FALSE;
     1.8  static struct gl_fbo_info fbo[MAX_FRAMEBUFFERS];
     1.9  
    1.10  #define ATTACHMENT_POINT(n) (GL_COLOR_ATTACHMENT0_EXT+(n))
    1.11 @@ -93,6 +94,15 @@
    1.12      }
    1.13      last_used_fbo = 0;
    1.14  
    1.15 +    if( isGLExtensionSupported("GL_EXT_packed_depth_stencil" ) ) {
    1.16 +        driver->capabilities.stencil_bits = 8;
    1.17 +        gl_fbo_have_packed_stencil = TRUE;
    1.18 +    } else {
    1.19 +        driver->capabilities.stencil_bits = 0;
    1.20 +        gl_fbo_have_packed_stencil = FALSE;
    1.21 +        WARN( "Packed depth stencil not available - disabling shadow volumes" );
    1.22 +    }
    1.23 +
    1.24      driver->create_render_buffer = gl_fbo_create_render_buffer;
    1.25      driver->destroy_render_buffer = gl_fbo_destroy_render_buffer;
    1.26      driver->set_render_target = gl_fbo_set_render_target;
    1.27 @@ -117,24 +127,31 @@
    1.28      }
    1.29  }
    1.30  
    1.31 -void gl_fbo_setup_framebuffer( int bufno, int width, int height )
    1.32 +static void gl_fbo_setup_framebuffer( int bufno, int width, int height )
    1.33  {
    1.34      glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo[bufno].fb_id);
    1.35 -    glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.36 -    glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, width, height);
    1.37 -    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
    1.38 -                                 GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.39 -    /* Stencil doesn't work on ATI, and we're not using it at the moment anyway, so...
    1.40 -    glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo[bufno].stencil_id);
    1.41 -    glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX, width, height);
    1.42 -    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT,
    1.43 -				 GL_RENDERBUFFER_EXT, fbo[bufno].stencil_id);
    1.44 -     */
    1.45 +    if( gl_fbo_have_packed_stencil ) {
    1.46 +        glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.47 +        glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, width, height);
    1.48 +        glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
    1.49 +                                     GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.50 +        glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT,
    1.51 +                                     GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.52 +    } else {
    1.53 +        glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.54 +        glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, width, height);
    1.55 +        glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
    1.56 +                                     GL_RENDERBUFFER_EXT, fbo[bufno].depth_id);
    1.57 +        /* In theory you could attach a separate stencil buffer. In practice this 
    1.58 +         * isn't actually supported by any hardware I've had access to, so we're
    1.59 +         * stencil-less.
    1.60 +         */
    1.61 +    }
    1.62      fbo[bufno].width = width;
    1.63      fbo[bufno].height = height;
    1.64  }
    1.65  
    1.66 -int gl_fbo_get_framebuffer( int width, int height ) 
    1.67 +static int gl_fbo_get_framebuffer( int width, int height ) 
    1.68  {
    1.69      int bufno = -1, i;
    1.70      /* find a compatible framebuffer context */