/// <summary>
/// Generates the packed material map for an object
/// </summary>
public static void GeneratePackedMaterialMap(AlloyCustomImportObject settings, Texture2D target, string filePath)
{
var size = settings.GetOutputSize();
var normalMap = settings.NormalMapTexture;
var useUnityGeneratedMipmaps = normalMap == null;
int width = (int)size.x;
int height = (int)size.y;
int mipmapCount = 1;
// When explicitly generating mip levels pick output count based on the largest input texture.
if (!useUnityGeneratedMipmaps)
{
mipmapCount = GetMipmapCount(normalMap);
for (int i = 0; i < 4; ++i)
{
if (settings.SelectedModes[i] != TextureValueChannelMode.Texture ||
settings.GetTexture(i) == null)
{
continue;
}
mipmapCount = Math.Max(mipmapCount, GetMipmapCount(settings.GetTexture(i)));
}
}
// Adjust the dimensions of the output texture if necessary.
if (target.width != width || target.height != height)
{
target.Resize(width, height);
}
if (!Mathf.IsPowerOfTwo(width) || !Mathf.IsPowerOfTwo(height))
{
Debug.LogWarning(
"Alloy: Texture resolution is not power of 2; will have issues generating correct mip maps if custom sizing is specified in generated texture platform settings.");
}
// Get readable input textures.
var readableNormal = AlloyTextureReader.GetReadable(normalMap, true);
var readableTextures = new Texture2D[settings.TexturesGUID.Length];
for (int i = 0; i < settings.TexturesGUID.Length; ++i)
{
if (settings.SelectedModes[i] != TextureValueChannelMode.Texture)
{
continue;
}
var settingsTex = settings.GetTexture(i);
if (settingsTex == null)
{
readableTextures[i] = null;
}
else
{
readableTextures[i] = AlloyTextureReader.GetReadable(settingsTex, false);
}
}
// Use renderer to sample mipmaps.
try {
var message = string.Format("Packing: \"{0}\"", settings.name);
var progress = 1.0f;
var bodyText = message;
for (int mipLevel = 0; mipLevel < mipmapCount; mipLevel++)
{
if (mipmapCount > 1)
{
progress = (float)mipLevel / (mipmapCount - 1);
bodyText = string.Format("{0} ({1})", message, progress.ToString("0%"));
}
EditorUtility.DisplayProgressBar("Building Packed maps...", bodyText, progress);
// CPU Method - more reliable/consistent across GPUs, but slower.
var normalCache = new AlloyTextureColorCache(readableNormal, target);
UnityEngine.Profiling.Profiler.BeginSample("Read");
var texCache = readableTextures.Select(tex => new AlloyTextureColorCache(tex, target)).ToArray();
UnityEngine.Profiling.Profiler.EndSample();
AlloyPackerCompositor.CompositeMips(target, settings, texCache, normalCache, mipLevel);
}
} finally {
EditorUtility.ClearProgressBar();
}
// Clean up the readable textures.
foreach (var texture in readableTextures)
{
Object.DestroyImmediate(texture);
}
Object.DestroyImmediate(readableNormal);
// Update the texture's associated settings .asset object.
settings.Width = width;
settings.Height = height;
settings.MaxResolution = 0;
EditorUtility.SetDirty(settings);
// Update the texture object.
target.Apply(useUnityGeneratedMipmaps, false);
}
/// <summary>
/// Generates the packed material map for an object
/// </summary>
public static void GeneratePackedMaterialMap(AlloyCustomImportObject settings, Texture2D target, string filePath)
{
int mipmapCount = 1;
Vector2 size = settings.GetOutputSize();
int width = (int)size.x;
int height = (int)size.y;
// Pick output texture dimensions based on the largest input texture.
for (int i = 0; i < 4; ++i)
{
if (settings.SelectedModes[i] != TextureValueChannelMode.Texture || settings.GetTexture(i) == null)
{
continue;
}
mipmapCount = Math.Max(mipmapCount, GetMipmapCount(settings.GetTexture(i)));
}
bool doMips;
if (settings.NormalMapTexture != null)
{
var tex = settings.NormalMapTexture;
var count = GetMipmapCount(tex);
mipmapCount = Math.Max(mipmapCount, count);
doMips = true;
}
else
{
mipmapCount = 1;
doMips = false;
}
if (target.width != width || target.height != height)
{
target.Resize(width, height);
}
if (!Mathf.IsPowerOfTwo(width) || !Mathf.IsPowerOfTwo(height))
{
Debug.LogWarning(
"Alloy: Texture resolution is not power of 2; will have issues generating correct mip maps if custom sizing is specified in generated texture platform settings.");
}
var readableTextures = new Texture2D[settings.TexturesGUID.Length];
for (int i = 0; i < settings.TexturesGUID.Length; ++i)
{
if (settings.SelectedModes[i] != TextureValueChannelMode.Texture)
{
continue;
}
var settingsTex = settings.GetTexture(i);
if (settingsTex == null)
{
readableTextures[i] = null;
}
else
{
readableTextures[i] = AlloyTextureReader.GetReadable(settingsTex, false);
}
}
var normal = AlloyTextureReader.GetReadable(settings.NormalMapTexture, true);
try {
// Use renderer to sample mipmaps.
for (int mipLevel = 0; mipLevel < mipmapCount; mipLevel++)
{
// CPU Method - more reliable/consistent across GPUs, but slower.
if (mipmapCount > 1)
{
EditorUtility.DisplayProgressBar("Calculating Mip Maps...", "MipLevel " + mipLevel, (float)mipLevel / mipmapCount);
}
else
{
EditorUtility.DisplayProgressBar("Calculating Packed map...", "Packing...", 1.0f);
}
var normalCache = new AlloyTextureColorCache(normal, target);
Profiler.BeginSample("Read");
var texCache = readableTextures.Select(tex => new AlloyTextureColorCache(tex, target)).ToArray();
Profiler.EndSample();
AlloyPackerCompositor.CompositeMips(target, settings, texCache, normalCache, mipLevel);
}
} finally {
EditorUtility.ClearProgressBar();
}
foreach (var texture in readableTextures)
{
Object.DestroyImmediate(texture);
}
Object.DestroyImmediate(normal);
int maxResolution = 0;
settings.Width = width;
settings.Height = height;
settings.MaxResolution = maxResolution;
EditorUtility.SetDirty(settings); // Tells Unity to save changes to the settings .asset object on disk
target.Apply(!doMips, false);
}