1 files changed, 89 insertions, 0 deletions
diff --git a/host/libs/virglrenderer/EglSurface.h b/host/libs/virglrenderer/EglSurface.h
new file mode 100644
index 000000000..4bb880dbb
--- /dev/null
+++ b/host/libs/virglrenderer/EglSurface.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <map>
+
+#include <EGL/egl.h>
+
+struct ANativeWindow;
+
+struct EglSurface {
+    static std::map<uint32_t, EglSurface*> map;
+    static uint32_t nextId;
+
+    EglSurface(EGLConfig config_, uint32_t ctx_, uint32_t width_, uint32_t height_)
+        : create_ctx(ctx_), config(config_), height(height_), width(width_), id(nextId++) {
+        map.emplace(id, this);
+    }
+
+    ~EglSurface() {
+        map.erase(id);
+    }
+
+    EglSurface* bind(uint32_t ctx_, bool read_) {
+        for (auto const& it : EglSurface::map) {
+            EglSurface* sur = it.second;
+            if (sur == this)
+                continue;
+            if (sur->bound_ctx == ctx_) {
+                if (read_ && sur->read)
+                    return sur;
+                if (!read_ && sur->draw)
+                    return sur;
+            }
+        }
+        if (read_) {
+            read = true;
+        } else {
+            draw = true;
+        }
+        bound_ctx = ctx_;
+        return nullptr;
+    }
+
+    void unbind(bool read_) {
+        if (read || draw) {
+            if (read_)
+                read = false;
+            else
+                draw = false;
+            if (read || draw)
+                return;
+            bound_ctx = 0U;
+        }
+        return;
+    }
+
+    bool disposable() {
+        return surface == EGL_NO_SURFACE && bound_ctx == 0U;
+    }
+
+    EGLSurface surface = EGL_NO_SURFACE;
+    ANativeWindow* window = nullptr;
+    uint32_t create_ctx;
+    EGLConfig config;
+    uint32_t height;
+    uint32_t width;
+    uint32_t id;
+
+  private:
+    uint32_t bound_ctx = 0U;
+    bool draw = false;
+    bool read = false;
+};