From c11480ce2ed39942938dda5fae0dde99e57ef57b Mon Sep 17 00:00:00 2001
From: maj00r <maj00r@host>
Date: Thu, 8 Oct 2026 20:20:12 +0200
Subject: [PATCH] fix flipped ortophot + clear cache

---
 application/editormode.cpp  |  4 ++++
 editor/editorOrthophoto.cpp | 18 ++++++++++++++++++
 editor/editorOrthophoto.hpp |  2 ++
 lang/editor_pl.po           |  6 ++++++
 4 files changed, 30 insertions(+)

diff --git a/application/editormode.cpp b/application/editormode.cpp
index 0ee3d1db..98dfd14b 100644
--- a/application/editormode.cpp
+++ b/application/editormode.cpp
@@ -1838,6 +1838,10 @@ void editor_mode::render_orthophoto_ui()
     if (!editor_orthophoto::can_download())
         ImGui::TextDisabled(STR_C("This build has no HTTP client, only cached tiles are shown"));
     ImGui::TextDisabled(STR_C("Cache: %s"), editor_orthophoto::cache_directory().c_str());
+    if (ImGui::Button(STR_C("Clear cache")))
+        m_orthophoto.clear_cache();
+    if (ImGui::IsItemHovered())
+        ImGui::SetTooltip(STR_C("Deletes downloaded tiles from disk. They are fetched again around the camera."));
     ImGui::TextDisabled(STR_C("Imagery: GUGiK, geoportal.gov.pl"));
 }
 
diff --git a/editor/editorOrthophoto.cpp b/editor/editorOrthophoto.cpp
index 26bbb646..7a33b127 100644
--- a/editor/editorOrthophoto.cpp
+++ b/editor/editorOrthophoto.cpp
@@ -417,6 +417,9 @@ bool fetch(http_client &Client, std::string const &Url, fs::path const &Path, st
 bool decode(std::vector<std::uint8_t> const &Data, image &Out, std::string &Error)
 {
 	int width{0}, height{0}, components{0};
+	// WMS GetMap is north-up. the texture loader sets a process-wide stb flip for OpenGL;
+	// pin this thread to no flip immediately before load so the first row stays north
+	stbi_set_flip_vertically_on_load_thread(0);
 	stbi_uc *pixels = stbi_load_from_memory(Data.data(), static_cast<int>(Data.size()), &width, &height, &components, 4);
 	if (pixels == nullptr)
 	{
@@ -738,6 +741,21 @@ void editor_orthophoto::cancel_pending()
 		entry.second.requested = 0;
 }
 
+void editor_orthophoto::clear_cache()
+{
+	cancel_pending();
+	for (auto &entry : m_tiles)
+		release_tile(entry.second);
+	m_tiles.clear();
+	++m_generation;
+	{
+		std::lock_guard<std::mutex> lock(m_mutex);
+		m_done.clear();
+	}
+	std::error_code ec;
+	fs::remove_all(cache_root(), ec);
+}
+
 void editor_orthophoto::retry_failed()
 {
 	for (auto &entry : m_tiles)
diff --git a/editor/editorOrthophoto.hpp b/editor/editorOrthophoto.hpp
index a2e5b761..dd081021 100644
--- a/editor/editorOrthophoto.hpp
+++ b/editor/editorOrthophoto.hpp
@@ -107,6 +107,8 @@ class editor_orthophoto
 	void draw(glm::mat4 const &ViewProjection, glm::dvec3 const &CameraPos, float ScreenWidth, float ScreenHeight) const;
 	// forgets pending (not yet started) downloads, e.g. when the editor is left
 	void cancel_pending();
+	// drops resident tiles and deletes the on-disk cache; enabled tiles are fetched again
+	void clear_cache();
 	// clears failure state so failed tiles are attempted again
 	void retry_failed();
 
diff --git a/lang/editor_pl.po b/lang/editor_pl.po
index 31b79ba5..510d5c9b 100644
--- a/lang/editor_pl.po
+++ b/lang/editor_pl.po
@@ -4057,6 +4057,12 @@ msgstr "Ten build nie ma klienta HTTP, widać tylko kafle z pamięci podręcznej
 msgid "Cache: %s"
 msgstr "Pamięć podręczna: %s"
 
+msgid "Clear cache"
+msgstr "Wyczyść cache"
+
+msgid "Deletes downloaded tiles from disk. They are fetched again around the camera."
+msgstr "Usuwa pobrane kafle z dysku. Zostaną ponownie pobrane wokół kamery."
+
 msgid "Imagery: GUGiK, geoportal.gov.pl"
 msgstr "Zdjęcia: GUGiK, geoportal.gov.pl"