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Support EGL protected content extension

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A protected context is required to allow the GPU
to operate on protected resources, including protected
surfaces and protected EGLImages.

For example, GPU can post-process on protected content
like DRM protected content so that complex, nonlinear
video effects or mapping onto textures can be used.

The surface format option may be relevant for DirectX
and Vulkan in the future:

  https://microsoft.github.io/DirectX-Specs/d3d/ProtectedResources.html
  https://www.khronos.org/registry/vulkan/specs/1.1-khr-extensions/html/chap12.html#memory-protected-memory

Change-Id: I2d155f0e68b830276690b4833b22a2bc452cdcad
Reviewed-by: Elvis Lee <kwangwoong.lee@lge.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
This commit is contained in:
Elvis Lee 2021-01-28 17:16:04 +09:00 committed by Tor Arne Vestbø
parent 2f9a3352b2
commit 7a68aa6fc7
4 changed files with 37 additions and 2 deletions
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9
src/gui/kernel/qsurfaceformat.cpp
View File

@ -152,6 +152,9 @@ public:
the monitoring of the loss of context, such as, Windows with WGL, or Linux/X11 (xcb) with GLX, will
monitor the status in every call to \l{QOpenGLContext::makeCurrent()}{makeCurrent()}. See
\l{QOpenGLContext::isValid()}{isValid()} for more information on this.
\value ProtectedContent Enables access to protected content. This allows the GPU to operate on protected
resources (surfaces, buffers, textures), for example DRM-protected video content.
Currently only implemented for EGL.
*/
/*!
@ -351,6 +354,9 @@ void QSurfaceFormat::setSamples(int numSamples)
Sets the format options to \a options.
To verify that an option was respected, compare the actual format to the
requested format after surface/context creation.
\sa options(), testOption()
*/
void QSurfaceFormat::setOptions(QSurfaceFormat::FormatOptions options)
@ -366,6 +372,9 @@ void QSurfaceFormat::setOptions(QSurfaceFormat::FormatOptions options)
Sets the format option \a option if \a on is true; otherwise, clears the option.
To verify that an option was respected, compare the actual format to the
requested format after surface/context creation.
\sa setOptions(), options(), testOption()
*/
void QSurfaceFormat::setOption(QSurfaceFormat::FormatOption option, bool on)

3
src/gui/kernel/qsurfaceformat.h
View File

@ -57,7 +57,8 @@ public:
StereoBuffers = 0x0001,
DebugContext = 0x0002,
DeprecatedFunctions = 0x0004,
ResetNotification = 0x0008
ResetNotification = 0x0008,
ProtectedContent = 0x0010
};
Q_ENUM(FormatOption)
Q_DECLARE_FLAGS(FormatOptions, FormatOption)

11
src/gui/opengl/platform/egl/qeglplatformcontext.cpp
View File

@ -155,6 +155,17 @@ QEGLPlatformContext::QEGLPlatformContext(const QSurfaceFormat &format, QPlatform
}
}
#ifdef EGL_EXT_protected_content
if (format.testOption(QSurfaceFormat::ProtectedContent)) {
if (q_hasEglExtension(m_eglDisplay, "EGL_EXT_protected_content")) {
contextAttrs.append(EGL_PROTECTED_CONTENT_EXT);
contextAttrs.append(EGL_TRUE);
} else {
m_format.setOption(QSurfaceFormat::ProtectedContent, false);
}
}
#endif
// Special Options for OpenVG surfaces
if (m_format.renderableType() == QSurfaceFormat::OpenVG) {
contextAttrs.append(EGL_ALPHA_MASK_SIZE);

16
src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmwindow.cpp
View File

@ -67,7 +67,21 @@ void QEglFSKmsGbmWindow::resetSurface()
}
if (createPlatformWindowSurface) {
m_surface = createPlatformWindowSurface(display, m_config, reinterpret_cast<void *>(m_window), nullptr);
QVector<EGLint> contextAttributes;
#ifdef EGL_EXT_protected_content
if (platformFormat.testOption(QSurfaceFormat::ProtectedContent)) {
if (q_hasEglExtension(display, "EGL_EXT_protected_content")) {
contextAttributes.append(EGL_PROTECTED_CONTENT_EXT);
contextAttributes.append(EGL_TRUE);
qCDebug(qLcEglfsKmsDebug, "Enabled EGL_PROTECTED_CONTENT_EXT for eglCreatePlatformWindowSurfaceEXT");
} else {
m_format.setOption(QSurfaceFormat::ProtectedContent, false);
}
}
#endif
contextAttributes.append(EGL_NONE);
m_surface = createPlatformWindowSurface(display, m_config, reinterpret_cast<void *>(m_window), contextAttributes.constData());
} else {
qCDebug(qLcEglfsKmsDebug, "No eglCreatePlatformWindowSurface for GBM, falling back to eglCreateWindowSurface");
m_surface = eglCreateWindowSurface(display, m_config, m_window, nullptr);