Updated ImGui.

3rdparty/ocornut-imgui/imgui.cpp

@@ -359,6 +359,7 @@
 
  Q: How can I load multiple fonts?
  A: Use the font atlas to pack them into a single texture:
+    (Read extra_fonts/README.txt and the code in ImFontAtlas for more details.)
 
       ImGuiIO& io = ImGui::GetIO();
       ImFont* font0 = io.Fonts->AddFontDefault();
@@ -371,7 +372,7 @@
       // Options
       ImFontConfig config;
       config.OversampleH = 3;
-      config.OversampleV = 3;
+      config.OversampleV = 1;
       config.GlyphExtraSpacing.x = 1.0f;
       io.Fonts->LoadFromFileTTF("myfontfile.ttf", size_pixels, &config);
 
@@ -383,8 +384,6 @@
       io.Fonts->LoadFromFileTTF("fontawesome-webfont.ttf", 16.0f, &config, ranges);
       io.Fonts->LoadFromFileTTF("myfontfile.ttf", size_pixels, NULL, &config, io.Fonts->GetGlyphRangesJapanese());
 
-    Read extra_fonts/README.txt or ImFontAtlas class for more details.
-
  Q: How can I display and input non-Latin characters such as Chinese, Japanese, Korean, Cyrillic?
  A: When loading a font, pass custom Unicode ranges to specify the glyphs to load. ImGui will support UTF-8 encoding across the board.
     Character input depends on you passing the right character code to io.AddInputCharacter(). The example applications do that.

3rdparty/ocornut-imgui/imgui_draw.cpp

@@ -37,7 +37,7 @@
 #pragma clang diagnostic ignored "-Wfloat-equal"            // warning : comparing floating point with == or != is unsafe   // storing and comparing against same constants ok.
 #pragma clang diagnostic ignored "-Wglobal-constructors"    // warning : declaration requires a global destructor           // similar to above, not sure what the exact difference it.
 #pragma clang diagnostic ignored "-Wsign-conversion"        // warning : implicit conversion changes signedness             //
-#pragma clang diagnostic ignored "-Wreserved-id-macro"      // warning : macro name is a reserved identifier                //
+//#pragma clang diagnostic ignored "-Wreserved-id-macro"    // warning : macro name is a reserved identifier                //
 #endif
 #ifdef __GNUC__
 #pragma GCC diagnostic ignored "-Wunused-function"          // warning: 'xxxx' defined but not used
@@ -1246,8 +1246,9 @@ bool    ImFontAtlas::Build()
         }
     }
 
-    // Start packing
-    TexWidth = (TexDesiredWidth > 0) ? TexDesiredWidth : (total_glyph_count > 2000) ? 2048 : (total_glyph_count > 1000) ? 1024 : 512;  // Width doesn't actually matters much but some API/GPU have texture size limitations, and increasing width can decrease height.
+    // Start packing. We need a known width for the skyline algorithm. Using a cheap heuristic here to decide of width. User can override TexDesiredWidth if they wish.
+    // After packing is done, width shouldn't matter much, but some API/GPU have texture size limitations and increasing width can decrease height.
+    TexWidth = (TexDesiredWidth > 0) ? TexDesiredWidth : (total_glyph_count > 4000) ? 4096 : (total_glyph_count > 2000) ? 2048 : (total_glyph_count > 1000) ? 1024 : 512;
     TexHeight = 0;
     const int max_tex_height = 1024*32;
     stbtt_pack_context spc;