Add support for glDepthRange

Added a new QRenderState to provide access to glDepthRange.

Task-number: QTBUG-73059
Change-Id: I434b73e6e499307bfa58b2a1001e4c48328e9d5b
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

2 files changed, 12 insertions, 3 deletions

diff --git a/src/plugins/sceneparsers/gltf/gltfimporter.cpp b/src/plugins/sceneparsers/gltf/gltfimporter.cpp
index 79f2bf2d3..7cda33113 100644
--- a/src/plugins/sceneparsers/gltf/gltfimporter.cpp
+++ b/src/plugins/sceneparsers/gltf/gltfimporter.cpp
@@ -64,6 +64,7 @@
 #include <Qt3DRender/qmultisampleantialiasing.h>
 #include <Qt3DRender/qpointsize.h>
 #include <Qt3DRender/qnodepthmask.h>
+#include <Qt3DRender/qdepthrange.h>
 #include <Qt3DRender/qdepthtest.h>
 #include <Qt3DRender/qseamlesscubemap.h>
 #include <Qt3DRender/qstencilmask.h>
@@ -2403,9 +2404,11 @@ QRenderState* GLTFImporter::buildState(const QString& functionName, const QJsonV
     }
 
     if (functionName == QLatin1String("depthRange")) {
-        //TODO: support render state depthRange
-        qCWarning(GLTFImporterLog, "unsupported render state: %ls", qUtf16PrintableImpl(functionName));
-        return nullptr;
+        type = GL_DEPTH_RANGE;
+        QDepthRange *depthRange = new QDepthRange;
+        depthRange->setNearValue(values.at(0).toDouble(0.0));
+        depthRange->setFarValue(values.at(1).toDouble(1.0));
+        return depthRange;
     }
 
     if (functionName == QLatin1String("frontFace")) {
diff --git a/src/plugins/sceneparsers/gltfexport/gltfexporter.cpp b/src/plugins/sceneparsers/gltfexport/gltfexporter.cpp
index ad657b4f2..40247f911 100644
--- a/src/plugins/sceneparsers/gltfexport/gltfexporter.cpp
+++ b/src/plugins/sceneparsers/gltfexport/gltfexporter.cpp
@@ -84,6 +84,7 @@
 #include <Qt3DRender/qclipplane.h>
 #include <Qt3DRender/qcolormask.h>
 #include <Qt3DRender/qcullface.h>
+#include <Qt3DRender/qdepthrange.h>
 #include <Qt3DRender/qdepthtest.h>
 #include <Qt3DRender/qdithering.h>
 #include <Qt3DRender/qfrontface.h>
@@ -1938,6 +1939,11 @@ void GLTFExporter::exportRenderStates(QJsonObject &jsonObj, const QRenderPass *p
             auto s = qobject_cast<QCullFace *>(state);
             arr << s->mode();
             funcObj["cullFace"] = arr;
+        } else if (qobject_cast<QDepthRange *>(state)) {
+            auto s = qobject_cast<QDepthRange *>(state);
+            arr << s->nearValue();
+            arr << s->farValue();
+            funcObj["depthRange"] = arr;
         } else if (qobject_cast<QDepthTest *>(state)) {
             auto s = qobject_cast<QDepthTest *>(state);
             arr << s->depthFunction();