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[platforms/virtual] Add support for EGL_MESA_platform_surfaceless

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Summary:
Thus we don't require vgem any more which fails with latest mesa.
Kepping the vgem variant as fallback for older systems. See T10245

Test Plan:
SceneOpenGL Test passes without init vgem, not tested with
latest mesa

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D17980
This commit is contained in:
Martin Flöser 2019-01-05 10:45:26 +01:00
parent a3bebb2fb8
commit bedd85821f
2 changed files with 9 additions and 1 deletions
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3
TESTING.md
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@ -11,7 +11,8 @@ The following additional software needs to be installed for running the test sui
* breeze window decoration
# Preparing a run of the test suite
Please load the kernel module "vgem". This is required to provide a virtual OpenGL device.
In case your system does not support the EGL extension EGL_MESA_platform_surfaceless,
please load the kernel module "vgem". This is required to provide a virtual OpenGL device.
sudo modprobe vgem

7
plugins/platforms/virtual/egl_gbm_backend.cpp
View file

@ -99,6 +99,13 @@ bool EglGbmBackend::initializeEgl()
// Use eglGetPlatformDisplayEXT() to get the display pointer
// if the implementation supports it.
if (display == EGL_NO_DISPLAY) {
// first try surfaceless
if (hasClientExtension(QByteArrayLiteral("EGL_MESA_platform_surfaceless"))) {
display = eglGetPlatformDisplayEXT(EGL_PLATFORM_SURFACELESS_MESA, EGL_DEFAULT_DISPLAY, nullptr);
}
}
if (display == EGL_NO_DISPLAY) {
qCDebug(KWIN_VIRTUAL) << "Failed to create surfaceless platform, trying with vgem device";
const bool hasMesaGBM = hasClientExtension(QByteArrayLiteral("EGL_MESA_platform_gbm"));
const bool hasKHRGBM = hasClientExtension(QByteArrayLiteral("EGL_KHR_platform_gbm"));
const GLenum platform = hasMesaGBM ? EGL_PLATFORM_GBM_MESA : EGL_PLATFORM_GBM_KHR;