GL: new amd-windows-broken-dsa-cubemap-copy workaround.

doc/changelog.dox

@@ -193,6 +193,8 @@ See also:
     @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-broken-dsa-cubemap-copy" @ce for broken
+        framebuffer-to-cubemap copies 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

src/Magnum/GL/Implementation/FramebufferState.cpp

@@ -124,18 +124,26 @@ FramebufferState::FramebufferState(Context& context, std::vector<std::string>& e
     }
 
     /* DSA/non-DSA implementation for cubemaps, because Intel Windows drivers
-       have to be broken in a special way */
+       have to be broken in a special way. Also reusing this branch for and AMD
+       workaround for cubemap copy. */
     #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-for-cubemaps"))
+        if(context.detectedDriver() & Context::DetectedDriver::IntelWindows && !context.isDriverWorkaroundDisabled("intel-windows-broken-dsa-for-cubemaps")) {
+            copySubCubeMapImplementation = &AbstractFramebuffer::copySub2DImplementationDefault;
+            textureCubeMapImplementation = &Framebuffer::texture2DImplementationDefault;
+        } else if(context.detectedDriver() & Context::DetectedDriver::Amd && !context.isDriverWorkaroundDisabled("amd-windows-broken-dsa-cubemap-copy")) {
+            copySubCubeMapImplementation = &AbstractFramebuffer::copySub2DImplementationDefault;
+            /* Cube map attachment is not broken */
+            textureCubeMapImplementation = &Framebuffer::texture2DImplementationDSA;
+        } else
         #endif
-    ) {
-        /* Extension name added above */
+        {
+            /* Extension name added above */
 
-        copySubCubeMapImplementation = &AbstractFramebuffer::copySubCubeMapImplementationDSA;
-        textureCubeMapImplementation = &Framebuffer::textureCubeMapImplementationDSA;
+            copySubCubeMapImplementation = &AbstractFramebuffer::copySubCubeMapImplementationDSA;
+            textureCubeMapImplementation = &Framebuffer::textureCubeMapImplementationDSA;
+        }
     } else
     #endif
     {

src/Magnum/GL/Implementation/driverSpecific.cpp

@@ -58,6 +58,10 @@ namespace {
    slicing and offset calculation, so those currently still fail. */
 "amd-windows-cubemap-image3d-slice-by-slice",
 
+/* AMD Windows drivers have broken the DSA glCopyTextureSubImage3D(), returning
+   GL_INVALID_VALUE. The non-DSA code path works. */
+"amd-windows-broken-dsa-cubemap-copy",
+
 /* 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