private void DrawDitheringSettingsGUI(MaterialEditor materialEditor)
{
// Hack: Get Palette and Pattern objects.
// Because it's not possible to save references to other objects within a shader or material object,
// This hack saves the instance id's in shader properties, by converting the exact bit setup to vectors.
_palette = BeffioDitherEditorUtilities.GetAssetFromVector(_paletteRefProperty.vectorValue) as Palette;
_pattern = BeffioDitherEditorUtilities.GetAssetFromVector(_patternRefProperty.vectorValue) as Pattern;
if (_palette == null)
{
_palette = AssetDatabase.LoadAssetAtPath <Palette>(_defaultPalettePath);
}
if (_pattern == null)
{
_pattern = AssetDatabase.LoadAssetAtPath <Pattern>(_defaultPatternPath);
}
bool hasPatternTexture = (_hasPatternTextureProperty.floatValue > 0.5f);
EditorGUI.indentLevel = 2;
// Palette
_palette = EditorGUILayout.ObjectField(ContentText.paletteProperty, _palette, typeof(Palette), false) as Palette;
if (_palette != null)
{
_colorCountProperty.floatValue = _palette.MixedColorCount;
_paletteHeightProperty.floatValue = _palette.Texture.height;
_paletteTexProperty.textureValue = _palette.Texture;
_paletteRefProperty.vectorValue = BeffioDitherEditorUtilities.AssetToVector4GUID(_palette);
}
else
{
_colorCountProperty.floatValue = 0;
_paletteHeightProperty.floatValue = Texture2D.whiteTexture.height;
_paletteTexProperty.textureValue = Texture2D.whiteTexture;
_paletteRefProperty.vectorValue = Vector4.zero;
}
// Pattern Asset
if (!hasPatternTexture)
{
EditorGUI.BeginChangeCheck();
{
_pattern = EditorGUILayout.ObjectField(ContentText.patternProperty, _pattern, typeof(Pattern), false) as Pattern;
if (EditorGUI.EndChangeCheck())
{
if (_pattern != null)
{
_patternSizeProperty.floatValue = _pattern.Texture.height;
_patternTexProperty.textureValue = _pattern.Texture;
_patternRefProperty.vectorValue = BeffioDitherEditorUtilities.AssetToVector4GUID(_pattern);
}
else
{
_patternSizeProperty.floatValue = 0;
_patternTexProperty.textureValue = null;
_patternRefProperty.vectorValue = Vector4.zero;
}
_hasPatternTextureProperty.floatValue = 0;
}
}
}
// Pattern Texture
if (_pattern == null)
{
EditorGUI.BeginChangeCheck();
{
EditorGUI.indentLevel = 0;
materialEditor.TexturePropertySingleLine(ContentText.patternTextureProperty, _patternTexProperty);
if (EditorGUI.EndChangeCheck())
{
if (_patternTexProperty.textureValue)
{
_patternSizeProperty.floatValue = _patternTexProperty.textureValue.height;
}
else
{
_patternSizeProperty.floatValue = 0;
}
_hasPatternTextureProperty.floatValue = (_patternTexProperty.textureValue == null ? 0 : 1);
}
}
}
EditorGUI.indentLevel = 2;
// Pattern Scale
materialEditor.FloatProperty(_patternScaleProperty, ContentText.patternScaleProperty.text);
// Screen Space Dithering
EditorGUI.BeginChangeCheck();
{
bool enabled = EditorGUILayout.Toggle(ContentText.screenSpaceProperty, _targetMat.IsKeywordEnabled("_SCREENSPACEDITHER"));
if (EditorGUI.EndChangeCheck())
{
EnableKeyword("_SCREENSPACEDITHER", enabled, ContentText.screenSpaceUndo);
}
}
// Alpha Cutout
if (_targetMat.HasProperty("_Cutout"))
{
materialEditor.ShaderProperty(_cutoutProperty, ContentText.cutoutProperty.text);
}
}
/* SETUP */
#region Setup
private void OnEnable()
{
m_Grain = AddComponent(new GrainComp());
cam = GetComponent <Camera>();
mat = new Material(Shader.Find("Unlit/Texture"));
#if UNITY_EDITOR
string _noiseTexturePath = "Assets/Stylizer/Resources/Shaders/NoiseAndGrain.png";
string _defaultPalettePath = "Assets/Stylizer/Styles/Palette/Palette_1.asset";
string _defaultNoisePath = "Assets/Stylizer/Styles/Pattern/Pattern_1.asset";
string _profilePath = "Assets/Stylizer/Resources/Scripts/UnityGrain/Grain.asset";
string _ubPath = "Assets/Stylizer/Resources/Scripts/UnityGrain/Shaders/Build materials/ub.mat";
string _gmPath = "Assets/Stylizer/Resources/Scripts/UnityGrain/Shaders/Build materials/gm.mat";
if (profile == null)
{
profile = AssetDatabase.LoadAssetAtPath <PostProf>(_profilePath);
if (profile == null)
{
Debug.LogWarningFormat("No grain profile found.", _profilePath);
}
}
if (ub == null)
{
ub = AssetDatabase.LoadAssetAtPath <Material>(_ubPath);
if (ub == null)
{
Debug.LogWarningFormat("No ub material found.", _ubPath);
}
}
if (gm == null)
{
gm = AssetDatabase.LoadAssetAtPath <Material>(_gmPath);
if (gm == null)
{
Debug.LogWarningFormat("No ub material found.", _gmPath);
}
}
if (_palette == null)
{
_palette = AssetDatabase.LoadAssetAtPath <Palette>(_defaultPalettePath);
if (_palette == null)
{
Debug.LogWarningFormat("No default palette found.", _defaultPalettePath);
}
}
if (_pattern == null)
{
_pattern = AssetDatabase.LoadAssetAtPath <Pattern>(_defaultNoisePath);
if (_pattern == null)
{
Debug.LogWarningFormat("No default pattern found.", _defaultNoisePath);
}
}
if (noiseTexture == null)
{
noiseTexture = AssetDatabase.LoadAssetAtPath <Texture2D>(_noiseTexturePath);
if (noiseTexture == null)
{
Debug.LogWarningFormat("No branding logo texture found at {0}, please make sure a texture is available at that path, or change the path in the variable _brandingLogoPath in this script.", _noiseTexturePath);
}
}
#endif
checkSupport();
}
/* PALETTE GENERATION */
#region Palette generation
/// <summary>
/// Creates and saves a palette image from the unique colors in another image.
///
/// The palette image structure:
///
/// | | | | | | | | row of 16 16x16 squares with the third mix color
/// |__|__|__|__|__|__|__|__
/// | | | | | | | | row of 16 16x16 squares with the second mix color
/// |__|__|__|__|__|__|__|__
/// | | | | | | | | row of 16 16x16 squares with the first mix color
/// |__|__|__|__|__|__|__|__
///
/// Each horizontal square has a fixed Red component: 0/15 to 15/15.
/// The blue component increases from 0 to 1 horizontally over a square.
/// The green component increases from 0 to 1 vertically over a square.
///
/// The palette image is used in the shaders to convert a truecolor to several dithered colors.
/// The truecolor RGB components points to N colors in the palette, one color per row of squares.
/// The N colors are mixed together in a dithering pattern to produce a close approximation of the original truecolor.
///
/// The steps to create the palette image:
///
/// 1. Load the color image to a Texture2D
/// 2. Create a list of all the unique colors in the color image
/// 3. Create the palette image
/// 4. a) Loop through each pixel in the palette image and determine the truecolor for that pixel
/// b) Device a mixing plan to achieve the truecolor
/// c) Save the N colors in the square column
/// 5. Save the palette image
/// </summary>
private void GeneratePaletteTexture(Palette palette)
{
if (palette.Colors.Count == 0)
{
Debug.LogError(ContentText.emptyColorListError);
return;
}
uint[] paletteColors = ConvertColorListToPaletteList(palette.Colors);
MixingPlanner mixingPlanner = new MixingPlanner(paletteColors);
// Create the palette image
int height = (int)Math.Pow(2, Math.Ceiling(Math.Log(_colorSquares * CurrentPalette.MixedColorCount - 1) / Math.Log(2)));
if (palette.Texture == null)
{
palette.Texture = new Texture2D(_colorSquares * _colorSquares, height, TextureFormat.RGB24, false);
palette.Texture.name = "Palette Texture";
palette.Texture.filterMode = FilterMode.Point;
palette.Texture.wrapMode = TextureWrapMode.Repeat;
AssetDatabase.AddObjectToAsset(palette.Texture, palette);
AssetDatabase.ImportAsset(AssetDatabase.GetAssetPath(palette.Texture));
}
else if (palette.Texture.height != height)
{
palette.Texture.Resize(_colorSquares * _colorSquares, height);
}
// Fill empty rows with magenta
int x = 0, y = 0;
for (int i = 0; i < palette.Texture.height * palette.Texture.width; i++)
{
x = i / palette.Texture.height;
y = i % palette.Texture.width;
palette.Texture.SetPixel(x, y, Color.magenta);
}
// Loop through each pixel in the palette image and determine the target color for that pixel
for (x = 0; x < _colorSquares * _colorSquares; x++)
{
for (y = 0; y < _colorSquares; y++)
{
byte r = (byte)((float)(x / _colorSquares) / (_colorSquares - 1) * 255);
byte g = (byte)((float)y / (_colorSquares - 1) * 255);
byte b = (byte)(((float)x % _colorSquares) / (_colorSquares - 1) * 255);
uint targetColor = (uint)((r << 16) + (g << 8) + b);
// Device a mixing plan to achieve the truecolor
uint[] mixingPlan = mixingPlanner.DeviseBestMixingPlan(targetColor, (uint)CurrentPalette.MixedColorCount);
// Save the N colors in the square column
for (int c = 0; c < CurrentPalette.MixedColorCount; c++)
{
palette.Texture.SetPixel(x, y + (CurrentPalette.MixedColorCount - c - 1) * _colorSquares, palette.Colors[(int)mixingPlan[c]]);
}
}
}
palette.Texture.Apply();
palette.HasTexture = true;
// Save the palette image
// SaveTexture(texture);
}