Add CefMacOsIOSurface (OC++/Java)

Author: MukjepScarlet

java/org/cef/handler/CefMacOsIOSurface.java

@@ -0,0 +1,20 @@
+// Copyright (c) 2026 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+
+package org.cef.handler;
+
+/**
+ * macOS IOSurface helpers used by accelerated off-screen rendering.
+ */
+public final class CefMacOsIOSurface {
+    private CefMacOsIOSurface() {}
+
+    /**
+     * Binds the IOSurface to the currently bound GL_TEXTURE_RECTANGLE texture in
+     * the current CGL context.
+     *
+     * @return CGLError, where 0 means success.
+     */
+    public static native int bindToCurrentTexture(long ioSurface, int width, int height);
+}

native/CMakeLists.txt

@@ -158,6 +158,7 @@ set(JCEF_SRCS_LINUX
   util_posix.cpp
   )
 set(JCEF_SRCS_MAC
+  CefMacOsIOSurface_N.mm
   critical_wait_posix.cpp
   temp_window_mac.h
   temp_window_mac.mm
@@ -312,7 +313,7 @@ if(OS_MAC)
   add_library(${JCEF_TARGET} SHARED ${JCEF_RESOURCES_SRCS} ${JCEF_SRCS})
   SET_EXECUTABLE_TARGET_PROPERTIES(${JCEF_TARGET})
   add_dependencies(${JCEF_TARGET} libcef_dll_wrapper)
-  target_link_libraries(${JCEF_TARGET} libcef_dll_wrapper ${CEF_STANDARD_LIBS}  ${JNI_LIBRARIES})
+  target_link_libraries(${JCEF_TARGET} libcef_dll_wrapper ${CEF_STANDARD_LIBS} ${JNI_LIBRARIES} "-framework OpenGL")
   target_include_directories(${JCEF_TARGET} PUBLIC ${JNI_INCLUDE_DIRS})
 
   # Compile flags specific to the JCEF library target.
@@ -431,4 +432,3 @@ if(OS_WINDOWS)
   COPY_FILES("${JCEF_TARGET}" "${CEF_BINARY_FILES}" "${CEF_BINARY_DIR}" "${CEF_TARGET_OUT_DIR}")
   COPY_FILES("${JCEF_TARGET}" "${CEF_RESOURCE_FILES}" "${CEF_RESOURCE_DIR}" "${CEF_TARGET_OUT_DIR}")
 endif()
-

native/CefMacOsIOSurface_N.mm

@@ -0,0 +1,36 @@
+// Copyright (c) 2026 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+
+#include <jni.h>
+
+#include <OpenGL/CGLIOSurface.h>
+#include <OpenGL/gl3.h>
+#include <OpenGL/OpenGL.h>
+
+JNIEXPORT jint JNICALL
+Java_org_cef_handler_CefMacOsIOSurface_bindToCurrentTexture(JNIEnv*,
+                                                            jclass,
+                                                            jlong io_surface,
+                                                            jint width,
+                                                            jint height) {
+  if (io_surface == 0 || width <= 0 || height <= 0) {
+    return kCGLBadValue;
+  }
+
+  CGLContextObj context = CGLGetCurrentContext();
+  if (context == nullptr) {
+    return kCGLBadContext;
+  }
+
+  return CGLTexImageIOSurface2D(
+      context,
+      GL_TEXTURE_RECTANGLE,
+      GL_RGBA,
+      width,
+      height,
+      GL_BGRA,
+      GL_UNSIGNED_INT_8_8_8_8_REV,
+      reinterpret_cast<IOSurfaceRef>(io_surface),
+      0);
+}