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#include "qt-display.hpp"
#include "qt-wrappers.hpp"
#include "display-helpers.hpp"
#include <QWindow>
#include <QScreen>
#include <QResizeEvent>
#include <QShowEvent>
#include <obs-config.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#endif
class SurfaceEventFilter : public QObject {
OBSQTDisplay *display;
public:
SurfaceEventFilter(OBSQTDisplay *src) : QObject(src), display(src) {}
protected:
bool eventFilter(QObject *obj, QEvent *event) override
{
bool result = QObject::eventFilter(obj, event);
QPlatformSurfaceEvent *surfaceEvent;
switch (event->type()) {
case QEvent::PlatformSurface:
surfaceEvent =
static_cast<QPlatformSurfaceEvent *>(event);
switch (surfaceEvent->surfaceEventType()) {
case QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed:
display->DestroyDisplay();
break;
default:
break;
}
break;
default:
break;
}
return result;
}
};
static inline long long color_to_int(const QColor &color)
{
auto shift = [&](unsigned val, int shift) {
return ((val & 0xff) << shift);
};
return shift(color.red(), 0) | shift(color.green(), 8) |
shift(color.blue(), 16) | shift(color.alpha(), 24);
}
static inline QColor rgba_to_color(uint32_t rgba)
{
return QColor::fromRgb(rgba & 0xFF, (rgba >> 8) & 0xFF,
(rgba >> 16) & 0xFF, (rgba >> 24) & 0xFF);
}
OBSQTDisplay::OBSQTDisplay(QWidget *parent, Qt::WindowFlags flags)
: QWidget(parent, flags)
{
setAttribute(Qt::WA_PaintOnScreen);
setAttribute(Qt::WA_StaticContents);
setAttribute(Qt::WA_NoSystemBackground);
setAttribute(Qt::WA_OpaquePaintEvent);
setAttribute(Qt::WA_DontCreateNativeAncestors);
setAttribute(Qt::WA_NativeWindow);
auto windowVisible = [this](bool visible) {
if (!visible) {
#if !defined(_WIN32) && !defined(__APPLE__)
display = nullptr;
#endif
return;
}
if (!display) {
CreateDisplay();
} else {
QSize size = GetPixelSize(this);
obs_display_resize(display, size.width(),
size.height());
}
};
auto screenChanged = [this](QScreen *) {
CreateDisplay();
QSize size = GetPixelSize(this);
obs_display_resize(display, size.width(), size.height());
};
connect(windowHandle(), &QWindow::visibleChanged, windowVisible);
connect(windowHandle(), &QWindow::screenChanged, screenChanged);
windowHandle()->installEventFilter(new SurfaceEventFilter(this));
}
QColor OBSQTDisplay::GetDisplayBackgroundColor() const
{
return rgba_to_color(backgroundColor);
}
void OBSQTDisplay::SetDisplayBackgroundColor(const QColor &color)
{
uint32_t newBackgroundColor = (uint32_t)color_to_int(color);
if (newBackgroundColor != backgroundColor) {
backgroundColor = newBackgroundColor;
UpdateDisplayBackgroundColor();
}
}
void OBSQTDisplay::UpdateDisplayBackgroundColor()
{
obs_display_set_background_color(display, backgroundColor);
}
void OBSQTDisplay::CreateDisplay()
{
if (display)
return;
if (destroying)
return;
if (!windowHandle()->isExposed())
return;
QSize size = GetPixelSize(this);
gs_init_data info = {};
info.cx = size.width();
info.cy = size.height();
info.format = GS_BGRA;
info.zsformat = GS_ZS_NONE;
if (!QTToGSWindow(windowHandle(), info.window))
return;
display = obs_display_create(&info, backgroundColor);
emit DisplayCreated(this);
}
void OBSQTDisplay::paintEvent(QPaintEvent *event)
{
CreateDisplay();
QWidget::paintEvent(event);
}
void OBSQTDisplay::moveEvent(QMoveEvent *event)
{
QWidget::moveEvent(event);
OnMove();
}
bool OBSQTDisplay::nativeEvent(const QByteArray &, void *message, qintptr *)
{
#ifdef _WIN32
const MSG &msg = *static_cast<MSG *>(message);
switch (msg.message) {
case WM_DISPLAYCHANGE:
OnDisplayChange();
}
#else
UNUSED_PARAMETER(message);
#endif
return false;
}
void OBSQTDisplay::resizeEvent(QResizeEvent *event)
{
QWidget::resizeEvent(event);
CreateDisplay();
if (isVisible() && display) {
QSize size = GetPixelSize(this);
obs_display_resize(display, size.width(), size.height());
}
emit DisplayResized();
}
QPaintEngine *OBSQTDisplay::paintEngine() const
{
return nullptr;
}
void OBSQTDisplay::OnMove()
{
if (display)
obs_display_update_color_space(display);
}
void OBSQTDisplay::OnDisplayChange()
{
if (display)
obs_display_update_color_space(display);
}
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