C++ GraphicsEngine::GetRenderStates方法代码示例

void HSeparator::Draw(nux::GraphicsEngine &GfxContext, bool force_draw)
{
  nux::Geometry const& base = GetGeometry();
  int y0 = base.y + base.GetHeight() / 2;

  unsigned int alpha = 0, src = 0, dest = 0;
  GfxContext.GetRenderStates().GetBlend(alpha, src, dest);
  nux::GetGraphicsDisplay()->GetGraphicsEngine()->GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

  if (base.GetWidth() - 2 * border_size_ > 0)
  {
    nux::Color color0 = color_ * alpha0_;
    nux::Color color1 = color_ * alpha1_;
    nux::GetPainter().Draw2DLine(GfxContext, base.x, y0, base.x + border_size_, y0, color0, color1);
    nux::GetPainter().Draw2DLine(GfxContext, base.x + border_size_, y0, base.x + base.GetWidth() - border_size_, y0, color1, color1);
    nux::GetPainter().Draw2DLine(GfxContext, base.x + base.GetWidth() - border_size_, y0, base.x + base.GetWidth(), y0, color1, color0);
  }
  else
  {
    nux::Color color1 = color_ *  alpha1_;
    nux::GetPainter().Draw2DLine(GfxContext, base.x, y0, base.x + base.GetWidth(), y0, color1, color1);
  }

  GfxContext.GetRenderStates().SetBlend(alpha, src, dest);
}

void OverlaySpinner::Draw(nux::GraphicsEngine& GfxContext, bool force_draw)
{
  nux::Geometry const& geo = GetGeometry();
  nux::TexCoordXForm texxform;

  GfxContext.PushClippingRectangle(geo);

  nux::GetPainter().PaintBackground(GfxContext, geo);

  texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_COORD);
  texxform.SetWrap(nux::TEXWRAP_REPEAT, nux::TEXWRAP_REPEAT);
  texxform.min_filter = nux::TEXFILTER_LINEAR;
  texxform.mag_filter = nux::TEXFILTER_LINEAR;

  unsigned int current_alpha_blend;
  unsigned int current_src_blend_factor;
  unsigned int current_dest_blend_factor;
  GfxContext.GetRenderStates().GetBlend(current_alpha_blend, current_src_blend_factor, current_dest_blend_factor);
  GfxContext.GetRenderStates().SetBlend(true,  GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

  nux::Geometry spin_geo(geo.x + ((geo.width - spin_->GetWidth()) / 2),
                         geo.y + ((geo.height - spin_->GetHeight()) / 2),
                         spin_->GetWidth(),
                         spin_->GetHeight());
  // Geometry (== Rect) uses integers which were rounded above,
  // hence an extra 0.5 offset for odd sizes is needed
  // because pure floating point is not being used.
  int spin_offset_w = !(geo.width % 2) ? 0 : 1;
  int spin_offset_h = !(geo.height % 2) ? 0 : 1;

  nux::Matrix4 matrix_texture;
  matrix_texture = nux::Matrix4::TRANSLATE(-spin_geo.x - (spin_geo.width + spin_offset_w) / 2.0f,
                                          -spin_geo.y - (spin_geo.height + spin_offset_h) / 2.0f, 0) * matrix_texture;
  matrix_texture = rotate_ * matrix_texture;
  matrix_texture = nux::Matrix4::TRANSLATE(spin_geo.x + (spin_geo.width + spin_offset_w) / 2.0f,
                                             spin_geo.y + (spin_geo.height + spin_offset_h) / 2.0f, 0) * matrix_texture;

  GfxContext.SetModelViewMatrix(GfxContext.GetModelViewMatrix() * matrix_texture);

  GfxContext.QRP_1Tex(spin_geo.x,
                      spin_geo.y,
                      spin_geo.width,
                      spin_geo.height,
                      spin_->GetDeviceTexture(),
                      texxform,
                      nux::color::White);

  // revert to model view matrix stack
  GfxContext.ApplyModelViewMatrix();

  GfxContext.PopClippingRectangle();

  GfxContext.GetRenderStates().SetBlend(current_alpha_blend, current_src_blend_factor, current_dest_blend_factor);

  if (!frame_timeout_)
  {
    frame_timeout_.reset(new glib::Timeout(22, sigc::mem_fun(this, &OverlaySpinner::OnFrameTimeout)));
  }
}

void HudButton::Draw(nux::GraphicsEngine& GfxContext, bool force_draw)
{
  if (skip_draw_)
    return;

  nux::Geometry const& geo = GetGeometry();
  GfxContext.PushClippingRectangle(geo);
  gPainter.PaintBackground(GfxContext, geo);

  // set up our texture mode
  nux::TexCoordXForm texxform;
  texxform.SetWrap(nux::TEXWRAP_CLAMP, nux::TEXWRAP_CLAMP);
  texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_COORD);

  // clear what is behind us
  unsigned int alpha = 0, src = 0, dest = 0;
  GfxContext.GetRenderStates().GetBlend(alpha, src, dest);
  GfxContext.GetRenderStates().SetPremultipliedBlend(nux::SRC_OVER);
  GfxContext.GetRenderStates().SetBlend(true);

  nux::Color col(nux::color::Black);
  col.alpha = 0;
  GfxContext.QRP_Color(geo.x,
                       geo.y,
                       geo.width,
                       geo.height,
                       col);

  nux::BaseTexture* texture = normal_->GetTexture();

  if (HasKeyFocus() || fake_focused())
    texture = active_->GetTexture();
  else if (HasKeyFocus())
    texture = prelight_->GetTexture();
  else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRESSED)
    texture = active_->GetTexture();

  GfxContext.QRP_1Tex(geo.x,
                      geo.y,
                      texture->GetWidth(),
                      texture->GetHeight(),
                      texture->GetDeviceTexture(),
                      texxform,
                      nux::color::White);

  GfxContext.GetRenderStates().SetBlend(alpha, src, dest);

  GfxContext.PopClippingRectangle();
}

void ApplicationPreview::DrawContent(nux::GraphicsEngine& gfx_engine, bool force_draw)
{
  nux::Geometry const& base = GetGeometry();
  gfx_engine.PushClippingRectangle(base);

  unsigned int alpha, src, dest = 0;
  gfx_engine.GetRenderStates().GetBlend(alpha, src, dest);
  gfx_engine.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

  if (GetCompositionLayout())
    GetCompositionLayout()->ProcessDraw(gfx_engine, force_draw);

  gfx_engine.GetRenderStates().SetBlend(alpha, src, dest);

  gfx_engine.PopClippingRectangle();
}

  virtual void Draw(nux::GraphicsEngine& gfx_engine, bool force_draw)
  {
    nux::Geometry const& base = GetGeometry();

    gfx_engine.PushClippingRectangle(base);
    nux::GetPainter().PaintBackground(gfx_engine, base);

    unsigned int alpha, src, dest = 0;
    gfx_engine.GetRenderStates().GetBlend(alpha, src, dest);
    gfx_engine.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

    bg_layer_->SetGeometry(GetGeometry());
    nux::GetPainter().RenderSinglePaintLayer(gfx_engine, GetGeometry(), bg_layer_.get());

    gfx_engine.GetRenderStates().SetBlend(alpha, src, dest);

    gfx_engine.PopClippingRectangle();
  }

void ScopeBarIcon::Draw(nux::GraphicsEngine& graphics_engine, bool force_draw)
{
  nux::Geometry const& geo = GetGeometry();

  graphics_engine.PushClippingRectangle(geo);

  if (HasKeyFocus() && focus_layer_)
  {
    nux::Geometry geo(GetGeometry());
    nux::AbstractPaintLayer* layer = focus_layer_.get();

    layer->SetGeometry(geo);
    layer->Renderlayer(graphics_engine);
  }

  if (texture())
  {
    unsigned int current_alpha_blend;
    unsigned int current_src_blend_factor;
    unsigned int current_dest_blend_factor;
    graphics_engine.GetRenderStates().GetBlend(current_alpha_blend, current_src_blend_factor, current_dest_blend_factor);
    graphics_engine.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

    float opacity = active ? 1.0f : inactive_opacity_;
    int width = 0, height = 0;
    GetTextureSize(&width, &height);

    nux::TexCoordXForm texxform;
    texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_COORD);
    texxform.SetWrap(nux::TEXWRAP_CLAMP_TO_BORDER, nux::TEXWRAP_CLAMP_TO_BORDER);

    graphics_engine.QRP_1Tex(geo.x + ((geo.width - width) / 2),
                         geo.y + ((geo.height - height) / 2),
                         width,
                         height,
                         texture()->GetDeviceTexture(),
                         texxform,
                         nux::color::White * opacity);

    graphics_engine.GetRenderStates().SetBlend(current_alpha_blend, current_src_blend_factor, current_dest_blend_factor);
  }

  graphics_engine.PopClippingRectangle();
}

void PaymentPreview::DrawContent(nux::GraphicsEngine& gfx_engine, bool force_draw)
{
    nux::Geometry const& base = GetGeometry();
    gfx_engine.PushClippingRectangle(base);

    if (!IsFullRedraw())
      nux::GetPainter().PushLayer(gfx_engine, details_bg_layer_->GetGeometry(), details_bg_layer_.get());

    unsigned int alpha, src, dest = 0;
    gfx_engine.GetRenderStates().GetBlend(alpha, src, dest);
    gfx_engine.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

    if (GetCompositionLayout())
      GetCompositionLayout()->ProcessDraw(gfx_engine, force_draw);

    gfx_engine.GetRenderStates().SetBlend(alpha, src, dest);

    if (!IsFullRedraw())
      nux::GetPainter().PopBackground();

    gfx_engine.PopClippingRectangle();
}

void
PlacesVScrollBar::DrawScrollbar(nux::GraphicsEngine& graphics_engine)
{
  // check if textures have been computed... if they haven't, exit function
  if (!slider_texture_)
    return;

  nux::Color color = nux::color::White;
  nux::Geometry const& base  = GetGeometry();
  nux::TexCoordXForm texxform;

  graphics_engine.PushClippingRectangle(base);
  unsigned int alpha = 0, src = 0, dest = 0;
  graphics_engine.GetRenderStates().GetBlend(alpha, src, dest);


  texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_SCALE_COORD);

  graphics_engine.GetRenderStates().SetBlend(true);
  graphics_engine.GetRenderStates().SetPremultipliedBlend(nux::SRC_OVER);

  if (content_height_ > container_height_)
  {
    nux::Geometry const& slider_geo = _slider->GetGeometry();

    graphics_engine.QRP_1Tex(slider_geo.x,
                        slider_geo.y,
                        slider_geo.width,
                        slider_geo.height,
                        slider_texture_->GetDeviceTexture(),
                        texxform,
                        color);
  }

  graphics_engine.PopClippingRectangle();
  graphics_engine.GetRenderStates().SetBlend(alpha, src, dest);
}

void
PanelView::DrawContent(nux::GraphicsEngine& GfxContext, bool force_draw)
{
  nux::Geometry const& geo = GetGeometry();
  bool overlay_mode = InOverlayMode();
  int bgs = 1;

  GfxContext.PushClippingRectangle(geo);

  GfxContext.GetRenderStates().SetBlend(true);
  GfxContext.GetRenderStates().SetPremultipliedBlend(nux::SRC_OVER);

  if (bg_blur_texture_.IsValid() && IsTransparent())
  {
    nux::Geometry const& geo_absolute = GetAbsoluteGeometry();
    nux::TexCoordXForm texxform_blur_bg;
    texxform_blur_bg.flip_v_coord = true;
    texxform_blur_bg.SetTexCoordType(nux::TexCoordXForm::OFFSET_COORD);
    texxform_blur_bg.uoffset = geo.x / static_cast<float>(geo_absolute.width);
    texxform_blur_bg.voffset = geo.y / static_cast<float>(geo_absolute.height);

    nux::ROPConfig rop;
    rop.Blend = false;
    rop.SrcBlend = GL_ONE;
    rop.DstBlend = GL_ONE_MINUS_SRC_ALPHA;

#ifndef NUX_OPENGLES_20
    if (GfxContext.UsingGLSLCodePath())
      gPainter.PushCompositionLayer(GfxContext, geo,
                                    bg_blur_texture_,
                                    texxform_blur_bg,
                                    nux::color::White,
                                    WindowManager::Default().average_color(),
                                    nux::LAYER_BLEND_MODE_OVERLAY,
                                    true,
                                    rop);
    else
      gPainter.PushTextureLayer(GfxContext, geo,
                                bg_blur_texture_,
                                texxform_blur_bg,
                                nux::color::White,
                                true,
                                rop);

#else
      gPainter.PushCompositionLayer(GfxContext, geo,
                                    bg_blur_texture_,
                                    texxform_blur_bg,
                                    nux::color::White,
                                    WindowManager::Default().average_color(),
                                    nux::LAYER_BLEND_MODE_OVERLAY,
                                    true,
                                    rop);
#endif
    bgs++;

    if (overlay_mode)
    {
      if (Settings::Instance().GetLowGfxMode())
      {
        rop.Blend = false;
        auto const& bg_color = WindowManager::Default().average_color();
        bg_darken_layer_.reset(new nux::ColorLayer(bg_color, false, rop));
      }

      nux::GetPainter().PushLayer(GfxContext, geo, bg_darken_layer_.get());
      bgs++;

      nux::Geometry refine_geo = geo;

      int refine_x_pos = geo.x + (stored_dash_width_ - refine_gradient_midpoint);
      refine_x_pos += unity::Settings::Instance().LauncherWidth(monitor_);

      refine_geo.x = refine_x_pos;
      refine_geo.width = bg_refine_tex_->GetWidth();

      if (!Settings::Instance().GetLowGfxMode())
      {
        nux::GetPainter().PushLayer(GfxContext, refine_geo, bg_refine_layer_.get());
        bgs++;

        refine_geo.x += refine_geo.width;
        refine_geo.width = geo.width;
        nux::GetPainter().PushLayer(GfxContext, refine_geo, bg_refine_single_column_layer_.get());
        bgs++;
      }
    }
  }

  if (!overlay_mode || !GfxContext.UsingGLSLCodePath())
    gPainter.PushLayer(GfxContext, geo, bg_layer_.get());

  if (overlay_mode && !Settings::Instance().GetLowGfxMode())
  {
    // apply the shine
    nux::TexCoordXForm texxform;
    texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_COORD);
    texxform.SetWrap(nux::TEXWRAP_CLAMP, nux::TEXWRAP_CLAMP);

    nux::ROPConfig rop;
//.........这里部分代码省略.........

void RatingsButton::Draw(nux::GraphicsEngine& GfxContext, bool force_draw)
{
  int rating =  static_cast<int>(GetRating() * NUM_STARS);
  // FIXME: 9/26/2011
  // We should probably support an API for saying whether the ratings
  // should or shouldn't support half stars...but our only consumer at
  // the moment is the applications scope which according to design
  // (Bug #839759) shouldn't. So for now just force rounding.
  //    int total_half_stars = rating % 2;
  //    int total_full_stars = rating / 2;
  int total_full_stars = rating;

  nux::Geometry const& geo = GetGeometry();
  nux::Geometry geo_star(geo);
  geo_star.width = star_size_.CP(scale);
  geo_star.height = star_size_.CP(scale);

  gPainter.PaintBackground(GfxContext, geo);
  // set up our texture mode
  nux::TexCoordXForm texxform;
  texxform.SetWrap(nux::TEXWRAP_CLAMP_TO_BORDER, nux::TEXWRAP_CLAMP_TO_BORDER);
  texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_SCALE_COORD);
  texxform.SetFilter(nux::TEXFILTER_LINEAR, nux::TEXFILTER_LINEAR);

  // clear what is behind us
  unsigned int alpha = 0, src = 0, dest = 0;

  GfxContext.GetRenderStates().GetBlend(alpha, src, dest);
  GfxContext.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

  nux::Color col = nux::color::Black;
  col.alpha = 0;
  GfxContext.QRP_Color(geo.x,
                       geo.y,
                       geo.width,
                       geo.height,
                       col);

  for (int index = 0; index < NUM_STARS; ++index)
  {
    dash::Style& style = dash::Style::Instance();
    auto texture = style.GetStarSelectedIcon();
    if (index < total_full_stars)
    {
      if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_NORMAL)
        texture = style.GetStarSelectedIcon();
      else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRELIGHT)
        texture = style.GetStarSelectedIcon();
      else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRESSED)
        texture = style.GetStarSelectedIcon();
    }
    else
    {
      if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_NORMAL)
        texture = style.GetStarDeselectedIcon();
      else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRELIGHT)
        texture = style.GetStarDeselectedIcon();
      else if (GetVisualState() == nux::ButtonVisualState::VISUAL_STATE_PRESSED)
        texture = style.GetStarDeselectedIcon();
    }

    GfxContext.QRP_1Tex(geo_star.x,
                        geo_star.y,
                        geo_star.width,
                        geo_star.height,
                        texture->GetDeviceTexture(),
                        texxform,
                        nux::Color(1.0f, 1.0f, 1.0f, 1.0f));

    if (focused_star_ == index)
    {
      GfxContext.QRP_1Tex(geo_star.x,
                          geo_star.y,
                          geo_star.width,
                          geo_star.height,
                          style.GetStarHighlightIcon()->GetDeviceTexture(),
                          texxform,
                          nux::Color(1.0f, 1.0f, 1.0f, 0.5f));
    }

    geo_star.x += geo_star.width + star_gap_.CP(scale);

  }

  GfxContext.GetRenderStates().SetBlend(alpha, src, dest);

}

void IconTexture::Draw(nux::GraphicsEngine& GfxContext, bool force_draw)
{
  unsigned int current_alpha_blend;
  unsigned int current_src_blend_factor;
  unsigned int current_dest_blend_factor;
  GfxContext.GetRenderStates().GetBlend(current_alpha_blend, current_src_blend_factor, current_dest_blend_factor);
  GfxContext.GetRenderStates().SetBlend(true, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

  nux::Geometry geo = GetGeometry();

  GfxContext.PushClippingRectangle(geo);

  nux::GetPainter().PaintBackground(GfxContext, geo);

  if (_texture_cached)
  {
    nux::Color col(1.0f * _opacity, 1.0f * _opacity, 1.0f * _opacity, _opacity);
    nux::TexCoordXForm texxform;

    if (_draw_mode == DrawMode::STRETCH_WITH_ASPECT)
    {
      nux::Geometry imageDest = geo;
      
      float geo_apsect = float(geo.GetWidth()) / geo.GetHeight();
      float image_aspect = float(_texture_cached->GetWidth()) / _texture_cached->GetHeight();

      if (image_aspect > geo_apsect)
      {
        imageDest.SetHeight(float(imageDest.GetWidth()) / image_aspect);
      } 
      if (image_aspect < geo_apsect)
      {
        imageDest.SetWidth(image_aspect * imageDest.GetHeight());
      }
      else
      {
        imageDest = nux::Geometry(0, 0, _texture_cached->GetWidth(), _texture_cached->GetHeight());
      }

      texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_SCALE_COORD);
      texxform.SetWrap(nux::TEXWRAP_CLAMP_TO_BORDER, nux::TEXWRAP_CLAMP_TO_BORDER);
      texxform.SetFilter(nux::TEXFILTER_LINEAR, nux::TEXFILTER_LINEAR);

      texxform.u0 = 0;
      texxform.v0 = 0;
      texxform.u1 = imageDest.width;
      texxform.v1 = imageDest.height;

      int border_width = 1;
      GfxContext.QRP_1Tex(geo.x + (float(geo.GetWidth() - imageDest.GetWidth()) / 2) + border_width,
                          geo.y + (float(geo.GetHeight() - imageDest.GetHeight()) / 2) + border_width,
                          imageDest.width - (border_width * 2),
                          imageDest.height - (border_width * 2),
                          _texture_cached.GetPointer()->GetDeviceTexture(),
                          texxform,
                          col);
    }
    else
    {
      texxform.SetTexCoordType(nux::TexCoordXForm::OFFSET_COORD);
      texxform.SetWrap(nux::TEXWRAP_CLAMP_TO_BORDER, nux::TEXWRAP_CLAMP_TO_BORDER);

      GfxContext.QRP_1Tex(geo.x + ((geo.width - _texture_size.width) / 2),
                          geo.y + ((geo.height - _texture_size.height) / 2),
                          _texture_size.width,
                          _texture_size.height,
                          _texture_cached->GetDeviceTexture(),
                          texxform,
                          col);
    }
  }

  GfxContext.PopClippingRectangle();

  GfxContext.GetRenderStates().SetBlend(current_alpha_blend, current_src_blend_factor, current_dest_blend_factor);
}