[test] Added GL objects tests

src/mbgl/gl/gl_config.hpp

@@ -12,24 +12,32 @@ namespace gl {
 template <typename T>
 class Value {
 public:
-    inline void operator=(const typename T::Type& value) {
+    void operator=(const typename T::Type& value) {
         if (dirty || current != value) {
             dirty = false;
             current = value;
             T::Set(current);
         }
     }
 
-    inline void reset() {
+    void reset() {
         dirty = true;
         current = T::Default;
         T::Set(current);
     }
 
-    inline void setDirty() {
+    void setDirty() {
         dirty = true;
     }
 
+    typename T::Type getCurrent() {
+        return current;
+    }
+
+    bool getDirty() {
+        return dirty;
+    }
+
 private:
     typename T::Type current = T::Default;
     bool dirty = false;

src/mbgl/gl/object_store.hpp

@@ -96,6 +96,14 @@ class ObjectStore : private util::noncopyable {
     // Only call this while the OpenGL context is exclusive to this thread.
     void performCleanup();
 
+    bool empty() const {
+        return abandonedPrograms.empty()
+            && abandonedShaders.empty()
+            && abandonedBuffers.empty()
+            && abandonedTextures.empty()
+            && abandonedVAOs.empty();
+    }
+
 private:
     friend ProgramDeleter;
     friend ShaderDeleter;

test/gl/object.cpp

@@ -0,0 +1,120 @@
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/platform/default/headless_display.hpp>
+#include <mbgl/platform/default/headless_view.hpp>
+
+#include <mbgl/gl/gl_helper.hpp>
+#include <mbgl/gl/gl_config.hpp>
+#include <mbgl/gl/object_store.hpp>
+
+#include <memory>
+
+namespace {
+
+static bool getFlag = false;
+static bool setFlag = false;
+
+}; // namespace
+
+struct MockGLObject {
+    using Type = bool;
+    static const Type Default = false;
+    static Type Get() { getFlag = true; return true; }
+    static void Set(const Type&) { setFlag = true; }
+};
+
+TEST(GLObject, Preserve) {
+    getFlag = false;
+    setFlag = false;
+
+    auto object = std::make_unique<mbgl::gl::Preserve<MockGLObject>>();
+    EXPECT_TRUE(getFlag);
+    EXPECT_FALSE(setFlag);
+
+    getFlag = false;
+    object.reset();
+    EXPECT_FALSE(getFlag);
+    EXPECT_TRUE(setFlag);
+}
+
+TEST(GLObject, Value) {
+    setFlag = false;
+
+    auto object = std::make_unique<mbgl::gl::Value<MockGLObject>>();
+    EXPECT_EQ(object->getCurrent(), false);
+    EXPECT_FALSE(object->getDirty());
+    EXPECT_FALSE(setFlag);
+
+    object->setDirty();
+    EXPECT_TRUE(object->getDirty());
+
+    *object = false;
+    EXPECT_EQ(object->getCurrent(), false);
+    EXPECT_FALSE(object->getDirty());
+    EXPECT_TRUE(setFlag);
+
+    setFlag = false;
+    *object = true;
+    EXPECT_EQ(object->getCurrent(), true);
+    EXPECT_FALSE(object->getDirty());
+    EXPECT_TRUE(setFlag);
+
+    object->reset();
+    EXPECT_EQ(object->getCurrent(), false);
+    EXPECT_TRUE(object->getDirty());
+    EXPECT_TRUE(setFlag);
+}
+
+TEST(GLObject, Store) {
+    mbgl::HeadlessView view(std::make_shared<mbgl::HeadlessDisplay>(), 1);
+    view.activate();
+
+    mbgl::gl::ObjectStore store;
+    EXPECT_TRUE(store.empty());
+
+    mbgl::gl::UniqueProgram program = store.createProgram();
+    EXPECT_TRUE(program.get() != 0);
+    program.reset();
+    EXPECT_FALSE(store.empty());
+    store.performCleanup();
+    EXPECT_TRUE(store.empty());
+
+    mbgl::gl::UniqueShader shader = store.createShader(GL_VERTEX_SHADER);
+    EXPECT_TRUE(shader.get() != 0);
+    shader.reset();
+    EXPECT_FALSE(store.empty());
+    store.performCleanup();
+    EXPECT_TRUE(store.empty());
+
+    mbgl::gl::UniqueBuffer buffer = store.createBuffer();
+    EXPECT_TRUE(buffer.get() != 0);
+    buffer.reset();
+    EXPECT_FALSE(store.empty());
+    store.performCleanup();
+    EXPECT_TRUE(store.empty());
+
+    mbgl::gl::UniqueTexture texture = store.createTexture();
+    EXPECT_TRUE(texture.get() != 0);
+    texture.reset();
+    EXPECT_FALSE(store.empty());
+    store.performCleanup();
+    EXPECT_TRUE(store.empty());
+
+    mbgl::gl::UniqueVAO vao = store.createVAO();
+    EXPECT_TRUE(vao.get() != 0);
+    vao.reset();
+    EXPECT_FALSE(store.empty());
+    store.performCleanup();
+    EXPECT_TRUE(store.empty());
+
+    mbgl::gl::UniqueTexturePool texturePool = store.createTexturePool();
+    for (auto& id : texturePool.get()) {
+        EXPECT_TRUE(id != 0);
+    }
+    texturePool.reset();
+    EXPECT_FALSE(store.empty());
+    store.performCleanup();
+    EXPECT_TRUE(store.empty());
+
+    view.deactivate();
+}

test/test.gypi

@@ -48,6 +48,8 @@
 
         'geometry/binpack.cpp',
 
+        'gl/object.cpp',
+
         'map/map.cpp',
         'map/transform.cpp',