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#include "GLWidget.h"
#include "igl.h"
#include "itextstream.h"
#include "ui/iwxgl.h"
#include "GLContext.h"
#include <wx/dcclient.h>
namespace wxutil
{
const int ATTRIBS [] = {
WX_GL_RGBA,
WX_GL_DOUBLEBUFFER,
WX_GL_DEPTH_SIZE, 24,
0
};
GLWidget::GLWidget(wxWindow *parent, const std::function<bool()>& renderCallback, const std::string& name) :
wxGLCanvas(parent, wxID_ANY, ATTRIBS, wxDefaultPosition, wxDefaultSize,
wxFULL_REPAINT_ON_RESIZE | wxWANTS_CHARS,
wxString(name.c_str(), *wxConvCurrent)),
_registered(false),
_renderCallback(renderCallback),
_privateContext(nullptr)
{
Bind(wxEVT_PAINT, &GLWidget::OnPaint, this);
}
void GLWidget::SetHasPrivateContext(bool hasPrivateContext)
{
if (hasPrivateContext)
{
_privateContext = new wxGLContext(this);
}
else
{
DestroyPrivateContext();
}
}
void GLWidget::DestroyPrivateContext()
{
if (_privateContext != nullptr)
{
_privateContext->UnRef();
_privateContext = nullptr;
}
}
GLWidget::~GLWidget()
{
DestroyPrivateContext();
if (_registered)
{
GlobalWxGlWidgetManager().unregisterGLWidget(this);
}
}
void GLWidget::OnPaint(wxPaintEvent& WXUNUSED(event))
{
// Got this check from the wxWidgets sources, they assert the widget to be shown
// "although on MSW it works even if the window is still hidden, it doesn't
// work in other ports (notably X11-based ones) and documentation mentions
// that SetCurrent() can only be called for a shown window, so check for it"
if (!IsShownOnScreen()) return;
// Make sure this widget is registered
if (!_registered)
{
_registered = true;
GlobalWxGlWidgetManager().registerGLWidget(this);
}
// This is required even though dc is not used otherwise.
wxPaintDC dc(this);
// Grab the context for this widget
if (_privateContext != nullptr)
{
// Use the private context for this widget
SetCurrent(*_privateContext);
}
else
{
// Use the globally shared context, we rely on this being of type GLContext
const auto& context = GlobalOpenGLContext().getSharedContext();
assert(std::dynamic_pointer_cast<GLContext>(context));
auto wxContext = std::static_pointer_cast<GLContext>(context);
SetCurrent(wxContext->get());
}
if (_renderCallback())
{
// Render callback returned true, so drawing took place
// and we can swap the buffers
SwapBuffers();
}
}
} // namespace
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