1 files changed, 66 insertions, 0 deletions
diff --git a/src/core/compositor/native_skia_output_device_metal.cpp b/src/core/compositor/native_skia_output_device_metal.cpp
new file mode 100644
index 000000000..a9d6e4fd5
--- /dev/null
+++ b/src/core/compositor/native_skia_output_device_metal.cpp
@@ -0,0 +1,66 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "native_skia_output_device_metal.h"
+
+#include <QtQuick/qquickwindow.h>
+#include <QtQuick/qsgtexture.h>
+
+namespace QtWebEngineCore {
+
+NativeSkiaOutputDeviceMetal::NativeSkiaOutputDeviceMetal(
+        scoped_refptr<gpu::SharedContextState> contextState, bool requiresAlpha,
+        gpu::MemoryTracker *memoryTracker, viz::SkiaOutputSurfaceDependency *dependency,
+        gpu::SharedImageFactory *shared_image_factory,
+        gpu::SharedImageRepresentationFactory *shared_image_representation_factory,
+        DidSwapBufferCompleteCallback didSwapBufferCompleteCallback)
+    : NativeSkiaOutputDevice(contextState, requiresAlpha, memoryTracker, dependency,
+                             shared_image_factory, shared_image_representation_factory,
+                             didSwapBufferCompleteCallback)
+{
+    SkColorType skColorType = kRGBA_8888_SkColorType;
+    capabilities_.sk_color_types[static_cast<int>(gfx::BufferFormat::RGBA_8888)] = skColorType;
+    capabilities_.sk_color_types[static_cast<int>(gfx::BufferFormat::RGBX_8888)] = skColorType;
+    capabilities_.sk_color_types[static_cast<int>(gfx::BufferFormat::BGRA_8888)] = skColorType;
+    capabilities_.sk_color_types[static_cast<int>(gfx::BufferFormat::BGRX_8888)] = skColorType;
+}
+
+NativeSkiaOutputDeviceMetal::~NativeSkiaOutputDeviceMetal() { }
+
+QSGTexture *makeMetalTexture(QQuickWindow *win, IOSurfaceRef ioSurface, uint ioSurfacePlane,
+                             const QSize &size, QQuickWindow::CreateTextureOptions texOpts);
+void releaseMetalTexture(void *texture);
+
+QSGTexture *NativeSkiaOutputDeviceMetal::texture(QQuickWindow *win, uint32_t textureOptions)
+{
+    if (!m_frontBuffer || !m_readyWithTexture)
+        return nullptr;
+
+    gfx::ScopedIOSurface ioSurface = m_frontBuffer->ioSurface();
+    if (!ioSurface) {
+        qWarning("No IOSurface.");
+        return nullptr;
+    }
+
+    // This is a workaround to not to release metal texture too early.
+    // In RHI, QMetalTexture wraps MTLTexture. QMetalTexture seems to be only destructed after the
+    // next MTLTexture is imported. The "old" MTLTexture can be still pontentially used by RHI
+    // while QMetalTexture is not destructed. Metal Validation Layer also warns about it.
+    // Delay releasing MTLTexture after the next one is presented.
+    if (m_currentMetalTexture) {
+        m_frontBuffer->textureCleanupCallback = [texture = m_currentMetalTexture]() {
+            releaseMetalTexture(texture);
+        };
+        m_currentMetalTexture = nullptr;
+    }
+
+    QQuickWindow::CreateTextureOptions texOpts(textureOptions);
+    QSGTexture *qsgTexture = makeMetalTexture(win, ioSurface.get(), /* plane */ 0, size(), texOpts);
+
+    auto ni = qsgTexture->nativeInterface<QNativeInterface::QSGMetalTexture>();
+    m_currentMetalTexture = ni->nativeTexture();
+
+    return qsgTexture;
+}
+
+} // namespace QtWebEngineCore