protected void SetMaterialKeywords(Material material)
{
BaseShaderGUI.SetMaterialKeywords(material);
_lightingFeature.SetMaterialKeywords(material);
_paletteFeature.SetMaterialKeywords(material);
}
// Separate Preserve Specular Lighting from Premultiplied blend mode.
// Update materials params for backwards compatibility. (Keep the same end result).
// - Previous (incorrect) premultiplied blend mode --> Alpha blend mode + Preserve Specular Lighting
// - Otherwise keep the blend mode and disable Preserve Specular Lighting
// - Correct premultiply mode is not possible in V5.
//
// This is run both hand-written and shadergraph materials.
//
// Hand-written and overridable shadergraphs always have blendModePreserveSpecular property, which
// is assumed to be new since we only run this for V5 -> V6 upgrade.
//
// Fixed shadergraphs do not have this keyword and are filtered out.
// The blend mode is baked in the generated shader, so there's no material properties to be upgraded.
// The shadergraph upgrade on re-import will handle the fixed shadergraphs.
static void UpgradeV6(Material material, ShaderID shaderID)
{
var surfaceTypePID = Shader.PropertyToID(Property.SurfaceType);
bool isTransparent = material.HasProperty(surfaceTypePID) && material.GetFloat(surfaceTypePID) >= 1.0f;
if (isTransparent)
{
if (shaderID == ShaderID.Unlit)
{
var blendModePID = Shader.PropertyToID(Property.BlendMode);
var blendMode = (BaseShaderGUI.BlendMode)material.GetFloat(blendModePID);
// Premultiply used to be "Premultiply (* alpha in shader)" aka Alpha blend
if (blendMode == BaseShaderGUI.BlendMode.Premultiply)
{
material.SetFloat(blendModePID, (float)BaseShaderGUI.BlendMode.Alpha);
}
}
else
{
var blendModePreserveSpecularPID = Shader.PropertyToID(Property.BlendModePreserveSpecular);
if (material.HasProperty(blendModePreserveSpecularPID))
{
var blendModePID = Shader.PropertyToID(Property.BlendMode);
var blendMode = (BaseShaderGUI.BlendMode)material.GetFloat(blendModePID);
if (blendMode == BaseShaderGUI.BlendMode.Premultiply)
{
material.SetFloat(blendModePID, (float)BaseShaderGUI.BlendMode.Alpha);
material.SetFloat(blendModePreserveSpecularPID, 1.0f);
}
else
{
material.SetFloat(blendModePreserveSpecularPID, 0.0f);
}
BaseShaderGUI.SetMaterialKeywords(material);
}
}
}
}