mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-10-01 23:56:16 -04:00
124 lines
3.5 KiB
C#
124 lines
3.5 KiB
C#
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using OpenDiablo2.Common.Interfaces;
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using SDL2;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace OpenDiablo2.SDL2_
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{
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internal sealed class SDL2Label : ILabel
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{
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private readonly SDL2Font font;
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private readonly IntPtr renderer;
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internal IntPtr texture;
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internal Size textureSize = new Size();
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public Point Position { get; set; }
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public Size TextArea { get; set; } = new Size();
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private Color textColor = Color.White;
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public Color TextColor
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{
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get => textColor;
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set
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{
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textColor = value;
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RegenerateTexture();
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}
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}
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private string text;
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public string Text
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{
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get => text;
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set
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{
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text = value;
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RegenerateTexture();
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}
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}
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internal SDL2Label(IFont font, IntPtr renderer)
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{
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this.renderer = renderer;
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this.font = font as SDL2Font;
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texture = IntPtr.Zero;
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}
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internal Size CalculateSize()
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{
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int w = 0;
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int h = 0;
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foreach (var ch in text)
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{
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var metric = font.font.CharacterMetric[(byte)ch];
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w += metric.Width;
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h = Math.Max(h, metric.Height);
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}
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return new Size(w, h);
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}
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internal int Pow2(int input)
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{
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var result = 1;
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while (result < input)
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result *= 2;
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return result;
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}
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internal void RegenerateTexture()
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{
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if (texture != IntPtr.Zero)
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SDL.SDL_DestroyTexture(texture);
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TextArea = CalculateSize();
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textureSize = new Size(Pow2(TextArea.Width), Pow2(TextArea.Height));
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texture = SDL.SDL_CreateTexture(renderer, SDL.SDL_PIXELFORMAT_ARGB8888, (int)SDL.SDL_TextureAccess.SDL_TEXTUREACCESS_TARGET, textureSize.Width, textureSize.Height);
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if (texture == IntPtr.Zero)
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throw new ApplicationException("Unaple to initialize texture.");
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SDL.SDL_SetTextureBlendMode(texture, SDL.SDL_BlendMode.SDL_BLENDMODE_BLEND);
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SDL.SDL_SetRenderTarget(renderer, texture);
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SDL.SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
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SDL.SDL_RenderFillRect(renderer, IntPtr.Zero);
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SDL.SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
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int cx = 0;
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int cy = 0;
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foreach (var ch in text)
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{
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WriteCharacter(cx, cy, (byte)ch);
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cx += font.font.CharacterMetric[(byte)ch].Width;
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}
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SDL.SDL_SetRenderTarget(renderer, IntPtr.Zero);
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}
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internal void WriteCharacter(int cx, int cy, byte character)
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{
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var rect = new SDL.SDL_Rect
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{
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x = cx,
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y = cy,
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w = font.sprite.FrameSize.Width,
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h = font.sprite.FrameSize.Height
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};
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SDL.SDL_SetTextureColorMod(font.sprite.textures[character], TextColor.R, TextColor.G, TextColor.B);
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SDL.SDL_RenderCopy(renderer, font.sprite.textures[character], IntPtr.Zero, ref rect);
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}
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public void Dispose()
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{
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if (texture != IntPtr.Zero)
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SDL.SDL_DestroyTexture(texture);
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}
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}
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}
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