1 files changed, 59 insertions, 0 deletions
diff --git a/modules/sd_models_xl.py b/modules/sd_models_xl.py
new file mode 100644
index 00000000..e8e270c3
--- /dev/null
+++ b/modules/sd_models_xl.py
@@ -0,0 +1,59 @@
+from __future__ import annotations
+
+import sys
+
+import torch
+
+import sgm.models.diffusion
+import sgm.modules.diffusionmodules.denoiser_scaling
+import sgm.modules.diffusionmodules.discretizer
+from modules import devices, shared, prompt_parser
+
+
+def get_learned_conditioning(self: sgm.models.diffusion.DiffusionEngine, batch: prompt_parser.SdConditioning | list[str]):
+    for embedder in self.conditioner.embedders:
+        embedder.ucg_rate = 0.0
+
+    width = getattr(self, 'target_width', 1024)
+    height = getattr(self, 'target_height', 1024)
+
+    sdxl_conds = {
+        "txt": batch,
+        "original_size_as_tuple": torch.tensor([height, width]).repeat(len(batch), 1).to(devices.device, devices.dtype),
+        "crop_coords_top_left": torch.tensor([shared.opts.sdxl_crop_top, shared.opts.sdxl_crop_left]).repeat(len(batch), 1).to(devices.device, devices.dtype),
+        "target_size_as_tuple": torch.tensor([height, width]).repeat(len(batch), 1).to(devices.device, devices.dtype),
+    }
+
+    c = self.conditioner(sdxl_conds)
+
+    return c
+
+
+def apply_model(self: sgm.models.diffusion.DiffusionEngine, x, t, cond):
+    return self.model(x, t, cond)
+
+
+def extend_sdxl(model):
+    dtype = next(model.model.diffusion_model.parameters()).dtype
+    model.model.diffusion_model.dtype = dtype
+    model.model.conditioning_key = 'crossattn'
+
+    model.cond_stage_model = [x for x in model.conditioner.embedders if 'CLIPEmbedder' in type(x).__name__][0]
+    model.cond_stage_key = model.cond_stage_model.input_key
+
+    model.parameterization = "v" if isinstance(model.denoiser.scaling, sgm.modules.diffusionmodules.denoiser_scaling.VScaling) else "eps"
+
+    discretization = sgm.modules.diffusionmodules.discretizer.LegacyDDPMDiscretization()
+    model.alphas_cumprod = torch.asarray(discretization.alphas_cumprod, device=devices.device, dtype=dtype)
+
+    model.is_xl = True
+
+
+sgm.models.diffusion.DiffusionEngine.get_learned_conditioning = get_learned_conditioning
+sgm.models.diffusion.DiffusionEngine.apply_model = apply_model
+
+sgm.modules.attention.print = lambda *args: None
+sgm.modules.diffusionmodules.model.print = lambda *args: None
+sgm.modules.diffusionmodules.openaimodel.print = lambda *args: None
+sgm.modules.encoders.modules.print = lambda *args: None
+