From eb5e4b2c0fb0c8301cbdbcf018f4107ac342617f Mon Sep 17 00:00:00 2001
From: Bartosz Taudul <wolf.pld@gmail.com>
Date: Fri, 30 Aug 2019 20:07:57 +0200
Subject: [PATCH] Test of shaded histogram graph.

---
 server/TracyImGui.hpp | 24 ++++++++++++++++++++++++
 server/TracyView.cpp  |  3 ++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/server/TracyImGui.hpp b/server/TracyImGui.hpp
index e805867e..fb632d2c 100644
--- a/server/TracyImGui.hpp
+++ b/server/TracyImGui.hpp
@@ -5,6 +5,9 @@
 #  pragma warning( disable: 4244 )  // conversion from don't care to whatever, possible loss of data 
 #endif
 
+#include <algorithm>
+#include <stdint.h>
+
 #include "../imgui/imgui.h"
 #include "../imgui/imgui_internal.h"
 
@@ -65,6 +68,27 @@ namespace tracy
         return ret;
     }
 
+    static inline void LineVertical( struct ImDrawList* draw, float x, float y0, float y1, uint32_t c0, uint32_t c1 )
+    {
+        draw->AddRectFilledMultiColor( ImVec2( x, y0 ), ImVec2( x+1, y1 ), c0, c0, c1, c1 );
+    }
+
+    static inline uint8_t lerp( uint8_t v0, uint8_t v1, float t )
+    {
+        return uint8_t( v0 + t * ( v1 - v0 ) );
+    }
+
+    static inline void LineVerticalShaded( struct ImDrawList* draw, float x, float y0, float y1, uint32_t c0, uint32_t c1, float maxHeight )
+    {
+        const auto dy = y1 - y0;
+        const auto t = std::min( 1.f, dy / maxHeight );
+        const auto ct = 0xFF000000 |
+            ( lerp( ( c0 & 0x00FF0000 ) >> 16, ( c1 & 0x00FF0000 ) >> 16, t ) << 16 ) |
+            ( lerp( ( c0 & 0x0000FF00 ) >>  8, ( c1 & 0x0000FF00 ) >>  8, t ) <<  8 ) |
+            ( lerp( ( c0 & 0x000000FF )      , ( c1 & 0x000000FF )      , t )       );
+        LineVertical( draw, x, y0, y1, c0, ct );
+    }
+
 }
 
 #endif
diff --git a/server/TracyView.cpp b/server/TracyView.cpp
index 5f1d51f4..f5e895de 100644
--- a/server/TracyView.cpp
+++ b/server/TracyView.cpp
@@ -7586,7 +7586,8 @@ void View::DrawFindZone()
                                 const auto val = cumulateTime ? binTime[i] : bins[i];
                                 if( val > 0 )
                                 {
-                                    draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - val * hAdj ), 0xFF22DDDD );
+                                    LineVerticalShaded( draw, wpos.x + 2+i, wpos.y + Height-2 - val * hAdj, wpos.y + Height-1, 0xFF22DDDD, 0xFF118888, hAdj );
+                                    //draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - val * hAdj ), 0xFF22DDDD );
                                     if( selBin[i] > 0 )
                                     {
                                         draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - selBin[i] * hAdj ), 0xFFDD7777 );