yukijoou/kwin
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

plugins/qpa: use a surfaceless context for offscreen surfaces

Browse source 
According to Qt documentation, offscreen surfaces aren't actually for rendering,
so using a surffaceless context is ok
This commit is contained in:
Xaver Hugl 2023-09-07 15:53:50 +02:00
parent c0e44378ca
commit 9dd236c87b
3 changed files with 3 additions and 49 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/plugins/qpa/eglplatformcontext.cpp
View file

@ -58,18 +58,9 @@ EGLPlatformContext::~EGLPlatformContext()
}
}
static EGLSurface eglSurfaceForPlatformSurface(QPlatformSurface *surface)
{
if (surface->surface()->surfaceClass() == QSurface::Window) {
return EGL_NO_SURFACE; // EGL_KHR_surfaceless_context is required
} else {
return static_cast<OffscreenSurface *>(surface)->eglSurface();
}
}
bool EGLPlatformContext::makeCurrent(QPlatformSurface *surface)
{
const bool ok = m_eglContext->makeCurrent(eglSurfaceForPlatformSurface(surface));
const bool ok = m_eglContext->makeCurrent();
if (!ok) {
qCWarning(KWIN_QPA, "eglMakeCurrent failed: %x", eglGetError());
return false;

35
src/plugins/qpa/offscreensurface.cpp
View file

@ -22,34 +22,8 @@ namespace QPA
OffscreenSurface::OffscreenSurface(QOffscreenSurface *surface)
: QPlatformOffscreenSurface(surface)
, m_eglDisplay(kwinApp()->outputBackend()->sceneEglDisplayObject())
, m_format(surface->requestedFormat())
{
const QSize size = surface->size();
EGLConfig config = configFromFormat(m_eglDisplay, surface->requestedFormat(), EGL_PBUFFER_BIT);
if (config == EGL_NO_CONFIG_KHR) {
return;
}
const EGLint attributes[] = {
EGL_WIDTH, size.width(),
EGL_HEIGHT, size.height(),
EGL_NONE};
m_surface = eglCreatePbufferSurface(m_eglDisplay, config, attributes);
if (m_surface == EGL_NO_SURFACE) {
return;
}
// Requested and actual surface format might be different.
m_format = formatFromConfig(m_eglDisplay, config);
}
OffscreenSurface::~OffscreenSurface()
{
if (m_surface != EGL_NO_SURFACE) {
eglDestroySurface(m_eglDisplay, m_surface);
}
}
QSurfaceFormat OffscreenSurface::format() const
@ -59,12 +33,7 @@ QSurfaceFormat OffscreenSurface::format() const
bool OffscreenSurface::isValid() const
{
return m_surface != EGL_NO_SURFACE;
}
EGLSurface OffscreenSurface::eglSurface() const
{
return m_surface;
return true;
}
} // namespace QPA

6
src/plugins/qpa/offscreensurface.h
View file

@ -25,18 +25,12 @@ class OffscreenSurface : public QPlatformOffscreenSurface
{
public:
explicit OffscreenSurface(QOffscreenSurface *surface);
~OffscreenSurface() override;
QSurfaceFormat format() const override;
bool isValid() const override;
EGLSurface eglSurface() const;
private:
QSurfaceFormat m_format;
EglDisplay *m_eglDisplay = nullptr;
EGLSurface m_surface = EGL_NO_SURFACE;
};
} // namespace QPA