GL: new amd-windows-dsa-createquery-except-xfb-overflow workaround.

doc/changelog.dox

@@ -188,9 +188,14 @@ See also:
     -   @cpp "intel-windows-broken-dsa-integer-vertex-attributes" @ce fixing
         @ref GL::Mesh::addVertexBuffer() with @ref Magnum::Short "Short"
         attributes
--   New @cpp "amd-windows-cubemap-image3d-slice-by-slice" @ce workaround for
-    broken handling of cube map image download and upload in DSA APIs on AMD
-    Windows drivers
+-   New AMD Windows driver workarounds, related to
+    @gl_extension{ARB,direct_state_access} as well --- see
+    @ref opengl-workarounds for more information:
+    -   @cpp "amd-windows-cubemap-image3d-slice-by-slice" @ce for broken
+        handling of cube map image download and upload in DSA APIs
+    -   @cpp "amd-windows-dsa-createquery-except-xfb-overflow" @ce using a
+        non-DSA code path for creating
+        @ref PrimitiveQuery::Target::TransformFeedbackOverflow queries
 -   New @cpp "arm-mali-timer-queries-oom-in-shell" @ce workaround for
     @ref GL::Context::DetectedDriver::ArmMali "ARM Mali" drivers on Android
     disabling the @gl_extension{EXT,disjoint_timer_query} extension in Android

src/Magnum/GL/AbstractQuery.cpp

@@ -64,6 +64,13 @@ void AbstractQuery::createImplementationDefault() {
 void AbstractQuery::createImplementationDSA() {
     glCreateQueries(_target, 1, &_id);
 }
+
+void AbstractQuery::createImplementationDSAExceptXfbOverflow() {
+    if(_target == GL_TRANSFORM_FEEDBACK_OVERFLOW || _target == GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW)
+        createImplementationDefault();
+    else
+        createImplementationDSA();
+}
 #endif
 
 #ifndef MAGNUM_TARGET_WEBGL

src/Magnum/GL/AbstractQuery.h

@@ -190,6 +190,7 @@ class MAGNUM_GL_EXPORT AbstractQuery: public AbstractObject {
         void MAGNUM_GL_LOCAL createImplementationDefault();
         #ifndef MAGNUM_TARGET_GLES
         void MAGNUM_GL_LOCAL createImplementationDSA();
+        void MAGNUM_GL_LOCAL createImplementationDSAExceptXfbOverflow();
         #endif
 
         ObjectFlags _flags;

src/Magnum/GL/Implementation/QueryState.cpp

@@ -34,15 +34,19 @@ namespace Magnum { namespace GL { namespace Implementation {
 QueryState::QueryState(Context& context, std::vector<std::string>& extensions) {
     /* Create implementation */
     #ifndef MAGNUM_TARGET_GLES
-    if(context.isExtensionSupported<Extensions::ARB::direct_state_access>()
+    if(context.isExtensionSupported<Extensions::ARB::direct_state_access>()) {
         #ifdef CORRADE_TARGET_WINDOWS
-        && (!(context.detectedDriver() & Context::DetectedDriver::IntelWindows) ||
-            context.isDriverWorkaroundDisabled("intel-windows-broken-dsa-indexed-queries"))
+        if((context.detectedDriver() & Context::DetectedDriver::IntelWindows) && !context.isDriverWorkaroundDisabled("intel-windows-broken-dsa-indexed-queries")) {
+            createImplementation = &AbstractQuery::createImplementationDefault;
+        } else if((context.detectedDriver() & Context::DetectedDriver::Amd) && !context.isDriverWorkaroundDisabled("amd-windows-dsa-createquery-except-xfb-overflow")) {
+            extensions.emplace_back(Extensions::ARB::direct_state_access::string());
+            createImplementation = &AbstractQuery::createImplementationDSAExceptXfbOverflow;
+        } else
         #endif
-    ) {
-        extensions.emplace_back(Extensions::ARB::direct_state_access::string());
-        createImplementation = &AbstractQuery::createImplementationDSA;
-
+        {
+            extensions.emplace_back(Extensions::ARB::direct_state_access::string());
+            createImplementation = &AbstractQuery::createImplementationDSA;
+        }
     } else
     #endif
     {

src/Magnum/GL/Implementation/driverSpecific.cpp

@@ -57,6 +57,12 @@ namespace {
    download is affected as well, but we lack APIs for easy format-dependent
    slicing and offset calculation, so those currently still fail. */
 "amd-windows-cubemap-image3d-slice-by-slice",
+
+/* AMD Windows glCreateQueries() works for everything except
+   GL_TRANSFORM_FEEDBACK_[STREAM_]OVERFLOW, probably they just forgot to adapt
+   it to this new GL 4.6 addition. Calling the non-DSA code path in that case
+   instead. */
+"amd-windows-dsa-createquery-except-xfb-overflow",
 #endif
 
 #if !defined(MAGNUM_TARGET_GLES) && !defined(CORRADE_TARGET_APPLE)