Make GpuBuffer a shared_ptr to a storage collection

PiperOrigin-RevId: 493519590

mediapipe/gpu/gpu_buffer_test.cc

@@ -20,6 +20,7 @@
 #include "mediapipe/framework/port/gmock.h"
 #include "mediapipe/framework/port/gtest.h"
 #include "mediapipe/framework/tool/test_util.h"
+#include "mediapipe/gpu/gl_texture_buffer.h"
 #include "mediapipe/gpu/gl_texture_util.h"
 #include "mediapipe/gpu/gpu_buffer_storage_ahwb.h"
 #include "mediapipe/gpu/gpu_buffer_storage_image_frame.h"
@@ -228,5 +229,26 @@ TEST_F(GpuBufferTest, GlTextureViewRetainsWhatItNeeds) {
   EXPECT_TRUE(true);
 }
 
+TEST_F(GpuBufferTest, CopiesShareConversions) {
+  GpuBuffer buffer(300, 200, GpuBufferFormat::kBGRA32);
+  {
+    std::shared_ptr<ImageFrame> view = buffer.GetWriteView<ImageFrame>();
+    FillImageFrameRGBA(*view, 255, 0, 0, 255);
+  }
+
+  GpuBuffer other_handle = buffer;
+  RunInGlContext([&buffer] {
+    TempGlFramebuffer fb;
+    auto view = buffer.GetReadView<GlTextureView>(0);
+  });
+
+  // Check that other_handle also sees the same GlTextureBuffer as buffer.
+  // Note that this is deliberately written so that it still passes on platforms
+  // where we use another storage for GL textures (they will both be null).
+  // TODO: expose more accessors for testing?
+  EXPECT_EQ(other_handle.internal_storage<GlTextureBuffer>(),
+            buffer.internal_storage<GlTextureBuffer>());
+}
+
 }  // anonymous namespace
 }  // namespace mediapipe