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287 行
10 KiB
287 行
10 KiB
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEditor;
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using System.IO;
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public class TextureCombiner
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{
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public static Texture2D _midGrey;
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public static Texture2D midGrey
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{
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get
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{
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if (_midGrey == null)
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_midGrey = TextureFromColor(Color.grey);
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return _midGrey;
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}
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}
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private static Dictionary<Color, Texture2D> singleColorTextures = new Dictionary<Color, Texture2D>();
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public static Texture2D TextureFromColor(Color color)
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{
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if (color == Color.white) return Texture2D.whiteTexture;
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if (color == Color.black) return Texture2D.blackTexture;
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bool makeTexture = !singleColorTextures.ContainsKey(color);
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if (!makeTexture)
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makeTexture = (singleColorTextures[color] == null);
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if (makeTexture)
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{
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Texture2D tex = new Texture2D(1, 1, TextureFormat.ARGB32, false, true);
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tex.SetPixel(0, 0, color);
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tex.Apply();
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singleColorTextures[color] = tex;
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}
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return singleColorTextures[color];
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}
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public static Texture GetTextureSafe(Material srcMaterial, string propertyName, Color fallback)
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{
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return GetTextureSafe(srcMaterial, propertyName, TextureFromColor(fallback));
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}
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public static Texture GetTextureSafe(Material srcMaterial, string propertyName, Texture fallback)
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{
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if (!srcMaterial.HasProperty(propertyName))
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return fallback;
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Texture tex = srcMaterial.GetTexture(propertyName);
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if (tex == null)
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return fallback;
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else
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return tex;
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}
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private static TextureFormat[] TextureFormatsWithouthAlpha = {
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TextureFormat.ASTC_RGB_10x10 ,
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TextureFormat.ASTC_RGB_12x12 ,
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TextureFormat.ASTC_RGB_4x4 ,
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TextureFormat.ASTC_RGB_5x5 ,
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TextureFormat.ASTC_RGB_6x6 ,
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TextureFormat.ASTC_RGB_8x8 ,
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TextureFormat.BC4 ,
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TextureFormat.BC5 ,
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TextureFormat.DXT1 ,
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TextureFormat.DXT1Crunched ,
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TextureFormat.EAC_R ,
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TextureFormat.EAC_R_SIGNED ,
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TextureFormat.EAC_RG ,
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TextureFormat.EAC_RG_SIGNED ,
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TextureFormat.ETC2_RGB ,
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TextureFormat.ETC_RGB4 ,
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#if !UNITY_2018_3_OR_NEWER
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TextureFormat.ETC_RGB4_3DS ,
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#endif
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TextureFormat.ETC_RGB4Crunched ,
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TextureFormat.PVRTC_RGB2 ,
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TextureFormat.PVRTC_RGB4 ,
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TextureFormat.R16 ,
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TextureFormat.R8 ,
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TextureFormat.RFloat ,
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TextureFormat.RG16 ,
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TextureFormat.RGB24 ,
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TextureFormat.RGB565 ,
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TextureFormat.RGB9e5Float ,
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TextureFormat.RGFloat ,
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TextureFormat.RGHalf ,
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TextureFormat.RHalf ,
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TextureFormat.YUY2
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};
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public static bool TextureHasAlpha(Texture2D tex)
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{
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if (tex == null) return false;
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bool o = true;
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int i = 0;
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while (i < TextureFormatsWithouthAlpha.Length && o)
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{
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o = tex.format != TextureFormatsWithouthAlpha[i];
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++i;
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}
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return o;
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}
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private Texture m_rSource;
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private Texture m_gSource;
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private Texture m_bSource;
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private Texture m_aSource;
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// Chanels are : r=0, g=1, b=2, a=3, greyscale from rgb = 4
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// If negative, the chanel is inverted
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private int m_rChanel;
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private int m_gChanel;
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private int m_bChanel;
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private int m_aChanel;
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// Chanels remaping
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private Vector4[] m_remapings = {
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new Vector4(0f, 1f, 0f, 0f),
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new Vector4(0f, 1f, 0f, 0f),
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new Vector4(0f, 1f, 0f, 0f),
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new Vector4(0f, 1f, 0f, 0f)
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};
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private bool m_bilinearFilter;
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private Dictionary<Texture, Texture> m_RawTextures;
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public TextureCombiner(Texture rSource, int rChanel, Texture gSource, int gChanel, Texture bSource, int bChanel, Texture aSource, int aChanel, bool bilinearFilter = true)
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{
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m_rSource = rSource;
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m_gSource = gSource;
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m_bSource = bSource;
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m_aSource = aSource;
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m_rChanel = rChanel;
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m_gChanel = gChanel;
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m_bChanel = bChanel;
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m_aChanel = aChanel;
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m_bilinearFilter = bilinearFilter;
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}
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public void SetRemapping(int channel, float min, float max)
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{
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if (channel > 3 || channel < 0) return;
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m_remapings[channel].x = min;
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m_remapings[channel].y = max;
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}
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public Texture2D Combine(string savePath)
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{
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int xMin = int.MaxValue;
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int yMin = int.MaxValue;
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if (m_rSource.width > 4 && m_rSource.width < xMin) xMin = m_rSource.width;
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if (m_gSource.width > 4 && m_gSource.width < xMin) xMin = m_gSource.width;
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if (m_bSource.width > 4 && m_bSource.width < xMin) xMin = m_bSource.width;
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if (m_aSource.width > 4 && m_aSource.width < xMin) xMin = m_aSource.width;
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if (xMin == int.MaxValue) xMin = 4;
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if (m_rSource.height > 4 && m_rSource.height < yMin) yMin = m_rSource.height;
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if (m_gSource.height > 4 && m_gSource.height < yMin) yMin = m_gSource.height;
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if (m_bSource.height > 4 && m_bSource.height < yMin) yMin = m_bSource.height;
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if (m_aSource.height > 4 && m_aSource.height < yMin) yMin = m_aSource.height;
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if (yMin == int.MaxValue) yMin = 4;
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Texture2D combined = new Texture2D(xMin, yMin, TextureFormat.RGBAFloat, true, true);
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combined.hideFlags = HideFlags.DontUnloadUnusedAsset;
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Material combinerMaterial = new Material(Shader.Find("Hidden/SRP_Core/TextureCombiner"));
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combinerMaterial.hideFlags = HideFlags.DontUnloadUnusedAsset;
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combinerMaterial.SetTexture("_RSource", GetRawTexture(m_rSource));
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combinerMaterial.SetTexture("_GSource", GetRawTexture(m_gSource));
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combinerMaterial.SetTexture("_BSource", GetRawTexture(m_bSource));
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combinerMaterial.SetTexture("_ASource", GetRawTexture(m_aSource));
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combinerMaterial.SetFloat("_RChannel", m_rChanel);
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combinerMaterial.SetFloat("_GChannel", m_gChanel);
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combinerMaterial.SetFloat("_BChannel", m_bChanel);
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combinerMaterial.SetFloat("_AChannel", m_aChanel);
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combinerMaterial.SetVector("_RRemap", m_remapings[0]);
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combinerMaterial.SetVector("_GRemap", m_remapings[1]);
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combinerMaterial.SetVector("_BRemap", m_remapings[2]);
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combinerMaterial.SetVector("_ARemap", m_remapings[3]);
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RenderTexture combinedRT = new RenderTexture(xMin, yMin, 0, RenderTextureFormat.ARGBFloat, RenderTextureReadWrite.sRGB);
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Graphics.Blit(Texture2D.whiteTexture, combinedRT, combinerMaterial);
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// Readback the render texture
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RenderTexture previousActive = RenderTexture.active;
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RenderTexture.active = combinedRT;
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combined.ReadPixels(new Rect(0, 0, xMin, yMin), 0, 0, false);
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combined.Apply();
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RenderTexture.active = previousActive;
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byte[] bytes = new byte[0];
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if (savePath.EndsWith("png"))
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bytes = ImageConversion.EncodeToPNG(combined);
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if (savePath.EndsWith("exr"))
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bytes = ImageConversion.EncodeToEXR(combined);
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if (savePath.EndsWith("jpg"))
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bytes = ImageConversion.EncodeToJPG(combined);
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string systemPath = Path.Combine(Application.dataPath.Remove(Application.dataPath.Length - 6), savePath);
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File.WriteAllBytes(systemPath, bytes);
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Object.DestroyImmediate(combined);
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AssetDatabase.ImportAsset(savePath);
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TextureImporter combinedImporter = (TextureImporter)AssetImporter.GetAtPath(savePath);
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combinedImporter.sRGBTexture = false;
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combinedImporter.SaveAndReimport();
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if (savePath.EndsWith("exr"))
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{
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// The options for the platform string are: "Standalone", "iPhone", "Android", "WebGL", "Windows Store Apps", "PSP2", "PS4", "XboxOne", "Nintendo 3DS", "WiiU", "tvOS".
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combinedImporter.SetPlatformTextureSettings(new TextureImporterPlatformSettings() {name = "Standalone", format = TextureImporterFormat.DXT5, overridden = true });
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}
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combined = AssetDatabase.LoadAssetAtPath<Texture2D>(savePath);
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//cleanup "raw" textures
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foreach (KeyValuePair<Texture, Texture> prop in m_RawTextures)
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{
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if (AssetDatabase.Contains(prop.Value))
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AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(prop.Value));
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}
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Object.DestroyImmediate(combinerMaterial);
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m_RawTextures.Clear();
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return combined;
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}
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private Texture GetRawTexture(Texture original, bool sRGBFallback = false)
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{
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if (m_RawTextures == null) m_RawTextures = new Dictionary<Texture, Texture>();
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if (!m_RawTextures.ContainsKey(original))
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{
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if (AssetDatabase.Contains(original))
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{
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string path = AssetDatabase.GetAssetPath(original);
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string rawPath = "Assets/raw_" + Path.GetFileName(path);
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AssetDatabase.CopyAsset(path, rawPath);
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AssetDatabase.ImportAsset(rawPath);
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TextureImporter rawImporter = (TextureImporter)AssetImporter.GetAtPath(rawPath);
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rawImporter.textureType = TextureImporterType.Default;
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rawImporter.mipmapEnabled = false;
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rawImporter.isReadable = true;
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rawImporter.filterMode = m_bilinearFilter ? FilterMode.Bilinear : FilterMode.Point;
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rawImporter.npotScale = TextureImporterNPOTScale.None;
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rawImporter.wrapMode = TextureWrapMode.Clamp;
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Texture2D originalTex2D = original as Texture2D;
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rawImporter.sRGBTexture = (originalTex2D == null) ? sRGBFallback : (AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(original)) as TextureImporter).sRGBTexture;
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rawImporter.maxTextureSize = 8192;
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rawImporter.textureCompression = TextureImporterCompression.Uncompressed;
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rawImporter.SaveAndReimport();
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m_RawTextures.Add(original, AssetDatabase.LoadAssetAtPath<Texture>(rawPath));
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}
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else
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m_RawTextures.Add(original, original);
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}
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return m_RawTextures[original];
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}
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}
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