added DisplayListCache to cache single glyphs as a DisplayLists

2 files changed, 85 insertions, 0 deletions

diff --git a/gui/display_list_cache.cpp b/gui/display_list_cache.cpp
new file mode 100644
index 0000000000..c3da094cc0
--- /dev/null
+++ b/gui/display_list_cache.cpp
@@ -0,0 +1,51 @@
+#include "display_list_cache.hpp"
+
+#include "../graphics/display_list.hpp"
+#include "../graphics/glyph.hpp"
+
+namespace gui
+{
+  DisplayListCache::DisplayListCache(graphics::Screen * CacheScreen,
+                                     graphics::GlyphCache * GlyphCache)
+    : m_CacheScreen(CacheScreen),
+      m_GlyphCache(GlyphCache)
+  {}
+
+  shared_ptr<graphics::DisplayList> const & DisplayListCache::FindGlyph(graphics::GlyphKey const & key)
+  {
+    TGlyphs::const_iterator it = m_Glyphs.find(key);
+
+    if (it != m_Glyphs.end())
+      return it->second;
+
+    shared_ptr<graphics::DisplayList> & dl = m_Glyphs[key];
+
+    dl.reset(m_CacheScreen->createDisplayList());
+
+    m_CacheScreen->beginFrame();
+    m_CacheScreen->setDisplayList(dl.get());
+
+    uint32_t resID = m_CacheScreen->mapInfo(graphics::Glyph::Info(key, m_GlyphCache));
+    graphics::Resource const * res = m_CacheScreen->fromID(resID);
+
+    ASSERT(res->m_cat == graphics::Resource::EGlyph, ());
+    graphics::Glyph const * glyph = static_cast<graphics::Glyph const *>(res);
+
+    m_CacheScreen->drawGlyph(m2::PointD(0, 0), m2::PointD(0, 0), ang::AngleD(0), 0, glyph, graphics::maxDepth - 10);
+
+    m_CacheScreen->setDisplayList(0);
+    m_CacheScreen->endFrame();
+
+    return dl;
+  }
+
+  void DisplayListCache::TouchGlyph(graphics::GlyphKey const & key)
+  {
+    FindGlyph(key);
+  }
+
+  bool DisplayListCache::HasGlyph(graphics::GlyphKey const & key)
+  {
+    return m_Glyphs.find(key) != m_Glyphs.end();
+  }
+}
diff --git a/gui/display_list_cache.hpp b/gui/display_list_cache.hpp
new file mode 100644
index 0000000000..c48f5b3868
--- /dev/null
+++ b/gui/display_list_cache.hpp
@@ -0,0 +1,34 @@
+#pragma once
+
+#include "../std/shared_ptr.hpp"
+
+#include "../graphics/screen.hpp"
+
+namespace gui
+{
+  class DisplayListCache
+  {
+  private:
+
+    /// Screen, which should be used for caching
+    graphics::Screen * m_CacheScreen;
+    /// GlyphCache, which should be used for caching
+    graphics::GlyphCache * m_GlyphCache;
+    /// Actual cache of glyphs as a display lists
+    typedef map<graphics::GlyphKey, shared_ptr<graphics::DisplayList> > TGlyphs;
+
+    TGlyphs m_Glyphs;
+
+  public:
+
+    DisplayListCache(graphics::Screen * CacheScreen,
+                     graphics::GlyphCache * GlyphCache);
+
+    /// Add element to cache if need be
+    void TouchGlyph(graphics::GlyphKey const & key);
+    /// Find glyph in cache, caching if needed.
+    shared_ptr<graphics::DisplayList> const & FindGlyph(graphics::GlyphKey const & key);
+    /// Check, whether the glyph is present in cache.
+    bool HasGlyph(graphics::GlyphKey const & key);
+  };
+}