void
RAS_FramingManager::
ComputeBestFitViewRect(
const RAS_Rect &availableViewport,
const float design_aspect_ratio,
RAS_Rect &viewport
){
// try and honour the aspect ratio when setting the
// drawable area. If we don't do this we are liable
// to get a lot of distortion in the rendered image.
int width = availableViewport.GetWidth();
int height = availableViewport.GetHeight();
float window_aspect = float(width)/float(height);
if (window_aspect < design_aspect_ratio) {
int v_height = (int)(width / design_aspect_ratio);
int left_over = (height - v_height) / 2;
viewport.SetLeft(availableViewport.GetLeft());
viewport.SetBottom(availableViewport.GetBottom() + left_over);
viewport.SetRight(availableViewport.GetLeft() + width);
viewport.SetTop(availableViewport.GetBottom() + left_over + v_height);
} else {
int v_width = (int)(height * design_aspect_ratio);
int left_over = (width - v_width) / 2;
viewport.SetLeft(availableViewport.GetLeft() + left_over);
viewport.SetBottom(availableViewport.GetBottom());
viewport.SetRight(availableViewport.GetLeft() + v_width + left_over);
viewport.SetTop(availableViewport.GetBottom() + height);
}
}
void RAS_OpenGLRasterizer::SetRenderArea()
{
RAS_Rect area;
// only above/below stereo method needs viewport adjustment
switch (m_stereomode)
{
case RAS_STEREO_ABOVEBELOW:
switch (m_curreye) {
case RAS_STEREO_LEFTEYE:
// upper half of window
area.SetLeft(0);
area.SetBottom(m_2DCanvas->GetHeight() -
int(m_2DCanvas->GetHeight() - m_noOfScanlines) / 2);
area.SetRight(int(m_2DCanvas->GetWidth()));
area.SetTop(int(m_2DCanvas->GetHeight()));
m_2DCanvas->SetDisplayArea(&area);
break;
case RAS_STEREO_RIGHTEYE:
// lower half of window
area.SetLeft(0);
area.SetBottom(0);
area.SetRight(int(m_2DCanvas->GetWidth()));
area.SetTop(int(m_2DCanvas->GetHeight() - m_noOfScanlines) / 2);
m_2DCanvas->SetDisplayArea(&area);
break;
}
break;
case RAS_STEREO_SIDEBYSIDE:
switch (m_curreye)
{
case RAS_STEREO_LEFTEYE:
// Left half of window
area.SetLeft(0);
area.SetBottom(0);
area.SetRight(m_2DCanvas->GetWidth()/2);
area.SetTop(m_2DCanvas->GetHeight());
m_2DCanvas->SetDisplayArea(&area);
break;
case RAS_STEREO_RIGHTEYE:
// Right half of window
area.SetLeft(m_2DCanvas->GetWidth()/2);
area.SetBottom(0);
area.SetRight(m_2DCanvas->GetWidth());
area.SetTop(m_2DCanvas->GetHeight());
m_2DCanvas->SetDisplayArea(&area);
break;
}
break;
default:
// every available pixel
area.SetLeft(0);
area.SetBottom(0);
area.SetRight(int(m_2DCanvas->GetWidth()));
area.SetTop(int(m_2DCanvas->GetHeight()));
m_2DCanvas->SetDisplayArea(&area);
break;
}
}
void KX_KetsjiEngine::GetSceneViewport(KX_Scene *scene, KX_Camera* cam, RAS_Rect& area, RAS_Rect& viewport)
{
// In this function we make sure the rasterizer settings are upto
// date. We compute the viewport so that logic
// using this information is upto date.
// Note we postpone computation of the projection matrix
// so that we are using the latest camera position.
if (cam->GetViewport()) {
RAS_Rect userviewport;
userviewport.SetLeft(cam->GetViewportLeft());
userviewport.SetBottom(cam->GetViewportBottom());
userviewport.SetRight(cam->GetViewportRight());
userviewport.SetTop(cam->GetViewportTop());
// Don't do bars on user specified viewport
RAS_FrameSettings settings = scene->GetFramingType();
if(settings.FrameType() == RAS_FrameSettings::e_frame_bars)
settings.SetFrameType(RAS_FrameSettings::e_frame_extend);
RAS_FramingManager::ComputeViewport(
scene->GetFramingType(),
userviewport,
viewport
);
area = userviewport;
}
else if ( !m_overrideCam || (scene->GetName() != m_overrideSceneName) || m_overrideCamUseOrtho ) {
RAS_FramingManager::ComputeViewport(
scene->GetFramingType(),
m_canvas->GetDisplayArea(),
viewport
);
area = m_canvas->GetDisplayArea();
} else {
viewport.SetLeft(0);
viewport.SetBottom(0);
viewport.SetRight(int(m_canvas->GetWidth()));
viewport.SetTop(int(m_canvas->GetHeight()));
area = m_canvas->GetDisplayArea();
}
}
void
RAS_FramingManager::
ComputeViewport(
const RAS_FrameSettings &settings,
const RAS_Rect &availableViewport,
RAS_Rect &viewport
){
RAS_FrameSettings::RAS_FrameType type = settings.FrameType();
const int winx = availableViewport.GetWidth();
const int winy = availableViewport.GetHeight();
const float design_width = float(settings.DesignAspectWidth());
const float design_height = float(settings.DesignAspectHeight());
float design_aspect_ratio = float(1);
if (design_height == float(0)) {
// well this is ill defined
// lets just scale the thing
type = RAS_FrameSettings::e_frame_scale;
} else {
design_aspect_ratio = design_width/design_height;
}
switch (type) {
case RAS_FrameSettings::e_frame_scale :
case RAS_FrameSettings::e_frame_extend:
{
viewport.SetLeft(availableViewport.GetLeft());
viewport.SetBottom(availableViewport.GetBottom());
viewport.SetRight(availableViewport.GetLeft() + int(winx));
viewport.SetTop(availableViewport.GetBottom() + int(winy));
break;
}
case RAS_FrameSettings::e_frame_bars:
{
ComputeBestFitViewRect(
availableViewport,
design_aspect_ratio,
viewport
);
break;
}
default :
break;
}
}