53 lines
1.8 KiB
C#
53 lines
1.8 KiB
C#
namespace Mine2d.engine;
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public class TextureFactory
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{
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private readonly ResourceLoader resourceLoader;
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private readonly Renderer renderer;
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private readonly Dictionary<string, IntPtr> textureCache = new();
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public TextureFactory(ResourceLoader resourceLoader, Renderer renderer)
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{
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this.resourceLoader = resourceLoader;
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this.renderer = renderer;
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}
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public IntPtr CreateTexture(string[] path)
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{
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var target = this.LoadTexture(path[0]);
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for (var i = 1; i < path.Length; i++)
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{
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var t = this.LoadTexture(path[i]);
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target = this.MergeTextures(target, t);
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}
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return target;
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}
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private IntPtr MergeTextures(IntPtr t1, IntPtr t2)
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{
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var (w, h) = this.renderer.GetTextureSize(t1);
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var target = SDL_CreateTexture(this.renderer.GetRaw(), SDL_PIXELFORMAT_RGBA8888, (int)SDL_TextureAccess.SDL_TEXTUREACCESS_TARGET, w, h);
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Renderer.ProcessStatus(SDL_SetRenderTarget(this.renderer.GetRaw(), target));
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Renderer.ProcessStatus(SDL_SetTextureBlendMode(target, SDL_BlendMode.SDL_BLENDMODE_BLEND));
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this.renderer.DrawTexture(t1, 0, 0, w, h);
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this.renderer.DrawTexture(t2, 0, 0, w, h);
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Renderer.ProcessStatus(SDL_SetRenderTarget(this.renderer.GetRaw(), IntPtr.Zero));
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return target;
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}
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public IntPtr LoadTexture(string path)
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{
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if (this.textureCache.TryGetValue(path, out var value))
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{
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return value;
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}
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var (ptr, size) = this.resourceLoader.LoadToIntPtr("assets." + path + ".png");
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var sdlBuffer = SDL_RWFromMem(ptr, size);
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var surface = IMG_Load_RW(sdlBuffer, 1);
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var texture = this.renderer.CreateTextureFromSurface(surface);
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SDL_FreeSurface(surface);
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this.textureCache.Add(path, texture);
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return texture;
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}
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}
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