// SPDX-FileCopyrightText: 2023 Erin Catto

// SPDX-FileCopyrightText: 2026 Ikpil Choi(ikpil@naver.com)

// SPDX-License-Identifier: MIT

using System.Numerics;

using ImGuiNET;

using static Box2D.NET.Samples.Graphics.Cameras;

namespace Box2D.NET.Samples.Graphics;

public static partial class Draws

{

public static void DrawScreenString(Draw draw, float x, float y, B2HexColor color, string message)

{

message = message.Length > 255 ? message[..255] : message;

uint hex = (uint)color;

// b2HexColor packs as 0xRRGGBB; matches MakeRGBA8's byte order. Force alpha to opaque.

uint col = ImGui.ColorConvertFloat4ToU32(new Vector4(((hex >> 16) & 0xFF) / 255.0f, ((hex >> 8) & 0xFF) / 255.0f,

(hex & 0xFF) / 255.0f, 1.0f));

// Old STB path treated y as the text baseline; ImGui::AddText treats y as the top of the

// glyph. Shift up by the font ascent so existing callers work.

float ascent = ImGui.GetFont().Ascent;

Vector2 viewportPosition = ImGui.GetMainViewport().Pos;

ImGui.GetBackgroundDrawList().AddText(viewportPosition + new Vector2(x, y - ascent), col, message);

}

public static void DrawWorldString(Draw draw, Camera camera, B2Vec2 p, B2HexColor color, string message)

{

message = message.Length > 255 ? message[..255] : message;

B2Vec2 ps = ConvertWorldToScreen(camera, p);

DrawScreenString(draw, ps.X, ps.Y, color, message);

}

}