1 files changed, 41 insertions, 0 deletions
diff --git a/src/mbgl/gl/texture_pool.cpp b/src/mbgl/gl/texture_pool.cpp
new file mode 100644
index 0000000000..a875f4d579
--- /dev/null
+++ b/src/mbgl/gl/texture_pool.cpp
@@ -0,0 +1,41 @@
+#include <mbgl/gl/texture_pool.hpp>
+#include <mbgl/gl/gl_object_store.hpp>
+
+#include <vector>
+
+namespace mbgl {
+namespace gl {
+
+GLuint TexturePool::getTextureID(gl::GLObjectStore& glObjectStore) {
+    for (auto& impl : pools) {
+        if (impl.ids.empty()) continue;
+        auto it = impl.ids.begin();
+        GLuint id = *it;
+        impl.ids.erase(it);
+        return id;
+    }
+
+    // All texture IDs are in use.
+    pools.emplace_back(Impl(glObjectStore));
+    auto it = pools.back().ids.begin();
+    GLuint id = *it;
+    pools.back().ids.erase(it);
+    return id;
+}
+
+void TexturePool::releaseTextureID(GLuint id) {
+    for (auto it = pools.begin(); it != pools.end(); ++it) {
+        for (GLsizei i = 0; i < gl::TexturePoolHolder::TextureMax; ++i) {
+            if (it->pool[i] == id) {
+                it->ids.push_back(id);
+                if (GLsizei(it->ids.size()) == gl::TexturePoolHolder::TextureMax) {
+                    pools.erase(it);
+                }
+                return;
+            }
+        }
+    }
+}
+
+} // namespace gl
+} // namespace mbgl