Moved GetColorU32 out of imgui_internal.h to avoid inlining mess (#759)

imgui.cpp

@@ -1197,6 +1197,20 @@ ImU32 ImGui::ColorConvertFloat4ToU32(const ImVec4& in)
     return out;
 }
 
+ImU32 ImGui::GetColorU32(ImGuiCol idx, float alpha_mul)  
+{ 
+    ImVec4 c = GImGui->Style.Colors[idx]; 
+    c.w *= GImGui->Style.Alpha * alpha_mul; 
+    return ImGui::ColorConvertFloat4ToU32(c); 
+}
+
+ImU32 ImGui::GetColorU32(const ImVec4& col)
+{ 
+    ImVec4 c = col; 
+    c.w *= GImGui->Style.Alpha; 
+    return ImGui::ColorConvertFloat4ToU32(c); 
+}
+
 // Convert rgb floats ([0-1],[0-1],[0-1]) to hsv floats ([0-1],[0-1],[0-1]), from Foley & van Dam p592
 // Optimized http://lolengine.net/blog/2013/01/13/fast-rgb-to-hsv
 void ImGui::ColorConvertRGBtoHSV(float r, float g, float b, float& out_h, float& out_s, float& out_v)

imgui_internal.h

@@ -703,9 +703,6 @@ namespace ImGui
 
     IMGUI_API void          OpenPopupEx(const char* str_id, bool reopen_existing);
 
-    inline IMGUI_API ImU32  GetColorU32(ImGuiCol idx, float alpha_mul)  { ImVec4 c = GImGui->Style.Colors[idx]; c.w *= GImGui->Style.Alpha * alpha_mul; return ImGui::ColorConvertFloat4ToU32(c); }
-    inline IMGUI_API ImU32  GetColorU32(const ImVec4& col)              { ImVec4 c = col; c.w *= GImGui->Style.Alpha; return ImGui::ColorConvertFloat4ToU32(c); }
-
     // NB: All position are in absolute pixels coordinates (not window coordinates)
     // FIXME: All those functions are a mess and needs to be refactored into something decent. Avoid use outside of imgui.cpp!
     // We need: a sort of symbol library, preferably baked into font atlas when possible + decent text rendering helpers.