[mapserver] Implement responsive tile fetching and more efficient

use of cache Refactor tiled mapserver layers to use the same approach as is done for WMTS/XYZ providers to avoid blocking renders while multiple outgoing tile requests are in progress. Improves the responsiveness of the provider and allows for much more efficient use of cache.
qgis · Jun 6, 2019 · a36787c · a36787c
1 parent 4662bb9
commit a36787c
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Showing 7 changed files with 624 additions and 52 deletions.
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
@@ -318,6 +318,7 @@ SET(QGIS_CORE_SRCS
   qgstessellator.cpp
   qgstextlabelfeature.cpp
   qgstextrenderer.cpp
+  qgstilecache.cpp
   qgstolerance.cpp
   qgstracer.cpp
   qgstranslationcontext.cpp
@@ -975,6 +976,7 @@ SET(QGIS_CORE_HDRS
   qgstextrenderer.h
   qgstextrenderer_p.h
   qgsthreadingutils.h
+  qgstilecache.h
   qgstracer.h
   qgstranslationcontext.h
 

diff --git a/src/providers/wms/qgstilecache.cpp → src/core/qgstilecache.cpp b/src/providers/wms/qgstilecache.cpp → src/core/qgstilecache.cpp
diff --git a/src/providers/wms/qgstilecache.h → src/core/qgstilecache.h b/src/providers/wms/qgstilecache.h → src/core/qgstilecache.h
@@ -16,22 +16,27 @@
 #ifndef QGSTILECACHE_H
 #define QGSTILECACHE_H
 
-
+#include "qgis_core.h"
 #include <QCache>
 #include <QMutex>
 
 class QImage;
 class QUrl;
 
+#define SIP_NO_FILE
+
 /**
  * A simple tile cache implementation. Tiles are cached according to their URL.
  * There is a small in-memory cache and a secondary caching in the local disk.
  * The in-memory cache is there to save CPU time otherwise wasted to read and
  * uncompress data saved on the disk.
  *
  * The class is thread safe (its methods can be called from any thread).
+ *
+ * \note Not available in Python bindings
+ * \since QGIS 3.8.0
  */
-class QgsTileCache
+class CORE_EXPORT QgsTileCache
 {
   public: