Support EGL protected content

If a buffer has a protected content like DRM decoded video,
the EGL Protected content extension allows GPU to operate on the buffer.

With that, wayland-egl can get EGL image and texture from protected content.

Change-Id: Ia687fc4ebc348cb03450e06713040acaa34b1cab
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

6 files changed, 37 insertions, 1 deletions

diff --git a/src/compositor/compositor_api/qwaylandbufferref.cpp b/src/compositor/compositor_api/qwaylandbufferref.cpp
index d7f6c43bb..39fb8f1fc 100644
--- a/src/compositor/compositor_api/qwaylandbufferref.cpp
+++ b/src/compositor/compositor_api/qwaylandbufferref.cpp
@@ -160,6 +160,16 @@ bool QWaylandBufferRef::hasContent() const
 {
     return QtWayland::ClientBuffer::hasContent(d->buffer);
 }
+/*!
+ * Returns true if this QWaylandBufferRef references a buffer that has protected content. Otherwise returns false.
+ *
+ * \since 6.2
+ * \sa hasContent()
+ */
+bool QWaylandBufferRef::hasProtectedContent() const
+{
+    return QtWayland::ClientBuffer::hasProtectedContent(d->buffer);
+}
 
 /*!
  * Returns true if this QWaylandBufferRef references a buffer that
diff --git a/src/compositor/compositor_api/qwaylandbufferref.h b/src/compositor/compositor_api/qwaylandbufferref.h
index b1aaf5f19..3549fb17a 100644
--- a/src/compositor/compositor_api/qwaylandbufferref.h
+++ b/src/compositor/compositor_api/qwaylandbufferref.h
@@ -62,6 +62,7 @@ public:
     bool isNull() const;
     bool hasBuffer() const;
     bool hasContent() const;
+    bool hasProtectedContent() const;
     bool isDestroyed() const;
     bool operator==(const QWaylandBufferRef &ref);
     bool operator!=(const QWaylandBufferRef &ref);
diff --git a/src/compositor/hardware_integration/qwlclientbufferintegration_p.h b/src/compositor/hardware_integration/qwlclientbufferintegration_p.h
index 0195f3d4b..29bf7d081 100644
--- a/src/compositor/hardware_integration/qwlclientbufferintegration_p.h
+++ b/src/compositor/hardware_integration/qwlclientbufferintegration_p.h
@@ -67,6 +67,7 @@ public:
     virtual void initializeHardware(struct ::wl_display *display) = 0;
 
     virtual ClientBuffer *createBufferFor(struct ::wl_resource *buffer) = 0;
+    virtual bool isProtected(struct ::wl_resource *buffer) { Q_UNUSED(buffer); return false; }
 
 protected:
     QWaylandCompositor *m_compositor = nullptr;
diff --git a/src/compositor/wayland_wrapper/qwlclientbuffer_p.h b/src/compositor/wayland_wrapper/qwlclientbuffer_p.h
index a6503e86e..f58d87294 100644
--- a/src/compositor/wayland_wrapper/qwlclientbuffer_p.h
+++ b/src/compositor/wayland_wrapper/qwlclientbuffer_p.h
@@ -86,6 +86,8 @@ public:
     virtual void setCommitted(QRegion &damage);
     bool isDestroyed() { return m_destroyed; }
 
+    virtual bool isProtected() { return false; }
+
     inline struct ::wl_resource *waylandBufferHandle() const { return m_buffer; }
 
     bool isSharedMemory() const { return wl_shm_buffer_get(m_buffer); }
@@ -95,6 +97,7 @@ public:
 #endif
 
     static bool hasContent(ClientBuffer *buffer) { return buffer && buffer->waylandBufferHandle(); }
+    static bool hasProtectedContent(ClientBuffer *buffer) { return buffer && buffer->isProtected(); }
 
 protected:
     void ref();
diff --git a/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.cpp b/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.cpp
index 7f8cced33..8649e70be 100644
--- a/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.cpp
+++ b/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.cpp
@@ -259,7 +259,14 @@ void WaylandEglClientBufferIntegrationPrivate::initEglTexture(WaylandEglClientBu
     }
 
     for (int i = 0; i < planes; i++) {
-        const EGLint attribs[] = { EGL_WAYLAND_PLANE_WL, i, EGL_NONE };
+        EGLint attribs[5] = { EGL_WAYLAND_PLANE_WL, i, EGL_NONE };
+#ifdef EGL_EXT_protected_content
+        if (buffer->isProtected()) {
+            attribs[2] = EGL_PROTECTED_CONTENT_EXT;
+            attribs[3] = EGL_TRUE;
+            attribs[4] = EGL_NONE;
+        }
+#endif
         EGLImageKHR image = egl_create_image(egl_display,
                                              EGL_NO_CONTEXT,
                                              EGL_WAYLAND_BUFFER_WL,
@@ -573,6 +580,10 @@ QOpenGLTexture *WaylandEglClientBuffer::toOpenGlTexture(int plane)
         texture->bind();
         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
         p->gl_egl_image_target_texture_2d(target, d->egl_images[plane]);
+#ifdef GL_EXT_protected_textures
+        if (isProtected())
+            glTexParameteri(target, GL_TEXTURE_PROTECTED_EXT, GL_TRUE);
+#endif
     }
     return texture;
 }
@@ -586,6 +597,15 @@ void WaylandEglClientBuffer::setCommitted(QRegion &damage)
     }
 }
 
+bool WaylandEglClientBuffer::isProtected()
+{
+    if (m_integration && m_buffer)
+        return m_integration->isProtected(m_buffer);
+
+    return false;
+}
+
+
 QWaylandSurface::Origin WaylandEglClientBuffer::origin() const
 {
     return d->isYInverted ? QWaylandSurface::OriginTopLeft : QWaylandSurface::OriginBottomLeft;
diff --git a/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.h b/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.h
index bbc0eafef..7bd13466e 100644
--- a/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.h
+++ b/src/hardwareintegration/compositor/wayland-egl/waylandeglclientbufferintegration.h
@@ -68,6 +68,7 @@ public:
     void unlockNativeBuffer(quintptr native_buffer) const override;
     QOpenGLTexture *toOpenGlTexture(int plane) override;
     void setCommitted(QRegion &damage) override;
+    bool isProtected() override;
 
 private:
     friend class WaylandEglClientBufferIntegration;