[PATCH v2 4/7] conf: Introduce virDomainGraphicsDefHasOpenGL helper

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A simple helper which will loop through all the graphics elements and
checks whether at least one of them enables OpenGL support, either by
containing <gl enable='yes'/> or being of type 'egl-headless'.

Signed-off-by: Erik Skultety <eskultet@xxxxxxxxxx>
---
 src/conf/domain_conf.c   | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/conf/domain_conf.h   |  3 +++
 src/libvirt_private.syms |  1 +
 3 files changed, 47 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 27f55d8868..54fc599e5d 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -30246,3 +30246,46 @@ virDomainDefHasManagedPR(const virDomainDef *def)
 
     return false;
 }
+
+
+/**
+ * virDomainGraphicsDefHasOpenGL:
+ * @def: domain definition
+ *
+ * Returns true if a domain config contains at least one <graphics> element
+ * with OpenGL support enabled, false otherwise.
+ */
+bool
+virDomainGraphicsDefHasOpenGL(const virDomainDef *def)
+{
+    size_t i;
+
+    for (i = 0; i < def->ngraphics; i++) {
+        virDomainGraphicsDefPtr graphics = def->graphics[i];
+
+        /* we only care about OpenGL support for a given type here */
+        switch (graphics->type) {
+        case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
+        case VIR_DOMAIN_GRAPHICS_TYPE_RDP:
+        case VIR_DOMAIN_GRAPHICS_TYPE_DESKTOP:
+            continue;
+        case VIR_DOMAIN_GRAPHICS_TYPE_SDL:
+            if (graphics->data.sdl.gl == VIR_TRISTATE_BOOL_YES)
+                return true;
+
+            continue;
+        case VIR_DOMAIN_GRAPHICS_TYPE_SPICE:
+            if (graphics->data.spice.gl == VIR_TRISTATE_BOOL_YES)
+                return true;
+
+            continue;
+        case VIR_DOMAIN_GRAPHICS_TYPE_EGL_HEADLESS:
+            return true;
+
+        case VIR_DOMAIN_GRAPHICS_TYPE_LAST:
+            break;
+        }
+    }
+
+    return false;
+}
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 66bfc94545..31d77e49c5 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -3641,4 +3641,7 @@ virDomainDiskGetDetectZeroesMode(virDomainDiskDiscard discard,
 bool
 virDomainDefHasManagedPR(const virDomainDef *def);
 
+bool
+virDomainGraphicsDefHasOpenGL(const virDomainDef *def);
+
 #endif /* __DOMAIN_CONF_H */
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 3e304907b9..3b6f6f6942 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -359,6 +359,7 @@ virDomainGetFilesystemForTarget;
 virDomainGraphicsAuthConnectedTypeFromString;
 virDomainGraphicsAuthConnectedTypeToString;
 virDomainGraphicsDefFree;
+virDomainGraphicsDefHasOpenGL;
 virDomainGraphicsGetListen;
 virDomainGraphicsListenAppendAddress;
 virDomainGraphicsListenAppendSocket;
-- 
2.14.4

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