remove do_issue_blending

panda/src/tinydisplay/tinyGraphicsStateGuardian.cxx

@@ -1817,134 +1817,6 @@ do_issue_texture() {
   */
 }
 
-////////////////////////////////////////////////////////////////////
-//     Function: TinyGraphicsStateGuardian::do_issue_blending
-//       Access: Protected
-//  Description:
-////////////////////////////////////////////////////////////////////
-void TinyGraphicsStateGuardian::
-do_issue_blending() {
-  /*
-  // Handle the color_write attrib.  If color_write is off, then
-  // all the other blending-related stuff doesn't matter.  If the
-  // device doesn't support color-write, we use blending tricks
-  // to effectively disable color write.
-  unsigned int color_channels =
-    _target._color_write->get_channels() & _color_write_mask;
-  if (color_channels == ColorWriteAttrib::C_off) {
-    if (_target._color_write != _state._color_write) {
-      enable_multisample_alpha_one(false);
-      enable_multisample_alpha_mask(false);
-      if (CLP(color_mask)) {
-        enable_blend(false);
-        glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-      } else {
-        enable_blend(true);
-        _glBlendEquation(GL_FUNC_ADD);
-        glBlendFunc(GL_ZERO, GL_ONE);
-      }
-    }
-    return;
-  } else {
-    if (_target._color_write != _state._color_write) {
-      if (CLP(color_mask)) {
-        glColorMask((color_channels & ColorWriteAttrib::C_red) != 0,
-                       (color_channels & ColorWriteAttrib::C_green) != 0,
-                       (color_channels & ColorWriteAttrib::C_blue) != 0,
-                       (color_channels & ColorWriteAttrib::C_alpha) != 0);
-      }
-    }
-  }
-
-  CPT(ColorBlendAttrib) color_blend = _target._color_blend;
-  ColorBlendAttrib::Mode color_blend_mode = _target._color_blend->get_mode();
-  TransparencyAttrib::Mode transparency_mode = _target._transparency->get_mode();
-
-  _color_blend_involves_color_scale = color_blend->involves_color_scale();
-
-  // Is there a color blend set?
-  if (color_blend_mode != ColorBlendAttrib::M_none) {
-    enable_multisample_alpha_one(false);
-    enable_multisample_alpha_mask(false);
-    enable_blend(true);
-    _glBlendEquation(get_blend_equation_type(color_blend_mode));
-    glBlendFunc(get_blend_func(color_blend->get_operand_a()),
-                   get_blend_func(color_blend->get_operand_b()));
-
-    if (_color_blend_involves_color_scale) {
-      // Apply the current color scale to the blend mode.
-      _glBlendColor(_current_color_scale[0], _current_color_scale[1],
-                    _current_color_scale[2], _current_color_scale[3]);
-
-    } else {
-      Colorf c = color_blend->get_color();
-      _glBlendColor(c[0], c[1], c[2], c[3]);
-    }
-    return;
-  }
-
-  // No color blend; is there a transparency set?
-  switch (transparency_mode) {
-  case TransparencyAttrib::M_none:
-  case TransparencyAttrib::M_binary:
-    break;
-
-  case TransparencyAttrib::M_alpha:
-  case TransparencyAttrib::M_dual:
-    enable_multisample_alpha_one(false);
-    enable_multisample_alpha_mask(false);
-    enable_blend(true);
-    _glBlendEquation(GL_FUNC_ADD);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-    return;
-
-  case TransparencyAttrib::M_multisample:
-    // We need to enable *both* of these in M_multisample case.
-    enable_multisample_alpha_one(true);
-    enable_multisample_alpha_mask(true);
-    enable_blend(false);
-    return;
-
-  case TransparencyAttrib::M_multisample_mask:
-    enable_multisample_alpha_one(false);
-    enable_multisample_alpha_mask(true);
-    enable_blend(false);
-    return;
-
-  default:
-    tinydisplay_cat.error()
-      << "invalid transparency mode " << (int)transparency_mode << endl;
-    break;
-  }
-
-  if (_line_smooth_enabled || _point_smooth_enabled) {
-    // If we have either of these turned on, we also need to have
-    // blend mode enabled in order to see it.
-    enable_multisample_alpha_one(false);
-    enable_multisample_alpha_mask(false);
-    enable_blend(true);
-    _glBlendEquation(GL_FUNC_ADD);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-    return;
-  }
-
-  // For best polygon smoothing, we need:
-  // (1) a frame buffer that supports alpha
-  // (2) sort polygons front-to-back
-  // (3) glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ONE);
-  //
-  // Since these modes have other implications for the application, we
-  // don't attempt to do this by default.  If you really want good
-  // polygon smoothing (and you don't have multisample support), do
-  // all this yourself.
-
-  // Nothing's set, so disable blending.
-  enable_multisample_alpha_one(false);
-  enable_multisample_alpha_mask(false);
-  enable_blend(false);
-  */
-}
-
 ////////////////////////////////////////////////////////////////////
 //     Function: TinyGraphicsStateGuardian::apply_texture
 //       Access: Protected

panda/src/tinydisplay/tinyGraphicsStateGuardian.h

@@ -102,7 +102,6 @@ private:
   void do_issue_cull_face();
   void do_issue_material();
   void do_issue_texture();
-  void do_issue_blending();
 
   void apply_texture(TextureContext *tc);
   bool upload_texture(TinyTextureContext *gtc);