diff --git a/examples/directx9_example/main.cpp b/examples/directx9_example/main.cpp
index fd25f0101..88faf74d6 100644
--- a/examples/directx9_example/main.cpp
+++ b/examples/directx9_example/main.cpp
@@ -297,6 +297,8 @@ void InitImGui()
 	io.RenderDrawListsFn = ImImpl_RenderDrawLists;
 	io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
 	io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
+
+	ImGui::GetStyle().PixelCenterOffset = 0.5f; // to make texels & pixels align
 }
 
 int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
diff --git a/imgui.cpp b/imgui.cpp
index 1ce8cce14..0e1d435c7 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -214,6 +214,7 @@ ImGuiStyle::ImGuiStyle()
 	TreeNodeSpacing			= 22.0f;
 	ColumnsMinSpacing		= 6.0f;				// Minimum space between two columns
 	ScrollBarWidth			= 16.0f;
+	PixelCenterOffset		= 0.0f;				// for <= d3d9, this should be 0.5f.  for ogl & d3d10+, 0.0f is correct
 
 	Colors[ImGuiCol_Text]					= ImVec4(0.90f, 0.90f, 0.90f, 1.00f);
 	Colors[ImGuiCol_WindowBg]				= ImVec4(0.00f, 0.00f, 0.00f, 1.00f);
@@ -3358,8 +3359,8 @@ bool RadioButton(const char* label, bool active)
 		return false;
 
 	ImVec2 center = check_bb.GetCenter();
-	center.x = (float)(int)center.x + 0.5f;
-	center.y = (float)(int)center.y + 0.5f;
+	center.x = (float)(int)center.x + style.PixelCenterOffset;
+	center.y = (float)(int)center.y + style.PixelCenterOffset;
 	const float radius = check_bb.GetHeight() * 0.5f;
 
 	const bool hovered = (g.HoveredWindow == window) && (g.HoveredId == 0) && IsMouseHoveringBox(check_bb);
@@ -4996,8 +4997,8 @@ void ImBitmapFont::RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& c
 	const float outline = (float)Info->Outline;
 
 	// Align to be pixel perfect
-	pos.x = (float)(int)pos.x + 0.5f;
-	pos.y = (float)(int)pos.y + 0.5f;
+	pos.x = (float)(int)pos.x + ImGui::GetStyle().PixelCenterOffset;
+	pos.y = (float)(int)pos.y + ImGui::GetStyle().PixelCenterOffset;
 
 	ImVec2 text_size = ImVec2(0,0);
 	float line_width = 0.0f;
diff --git a/imgui.h b/imgui.h
index 3c7505771..29904e7ac 100644
--- a/imgui.h
+++ b/imgui.h
@@ -352,6 +352,7 @@ struct ImGuiStyle
 	float		TreeNodeSpacing;
 	float		ColumnsMinSpacing;
 	float		ScrollBarWidth;
+	float		PixelCenterOffset;
 	ImVec4		Colors[ImGuiCol_COUNT];
 
 	ImGuiStyle();