changes for inpainting for #35

support for --medvram
attempt to support share

README.md

@@ -71,10 +71,10 @@ Run the command to start web ui:
 python stable-diffusion-webui/webui.py
 ```
 
-If you have a 4GB video card, run the command with `--lowvram` argument:
+If you have a 4GB video card, run the command with either `--lowvram` or `--medvram` argument:
 
 ```
-python stable-diffusion-webui/webui.py --lowvram
+python stable-diffusion-webui/webui.py --medvram
 ```
 
 After a while, you will get a message like this:
@@ -280,17 +280,18 @@ print("Seed was: " + str(processed.seed))
 display(processed.images, processed.seed, processed.info)
 ```
 
-### `--lowvram`
+### 4GB videocard support
 Optimizations for GPUs with low VRAM. This should make it possible to generate 512x512 images on videocards with 4GB memory.
 
-The original idea of those optimizations is by basujindal: https://github.com/basujindal/stable-diffusion. Model is separated into modules,
+`--lowvram` is a reimplementation of optimization idea from by [basujindal](https://github.com/basujindal/stable-diffusion).
-and only one module is kept in GPU memory; when another module needs to run, the previous is removed from GPU memory.
+Model is separated into modules, and only one module is kept in GPU memory; when another module needs to run, the previous
-
+is removed from GPU memory. The nature of this optimization makes the processing run slower -- about 10 times slower
-It should be obvious but the nature of those optimizations makes the processing run slower -- about 10 times slower
 compared to normal operation on my RTX 3090.
 
-This is an independent implementation that does not require any modification to original Stable Diffusion code, and
+`--medvram` is another optimization that should reduce VRAM usage significantly by not peocessing conditional and
-with all code concenrated in one place rather than scattered around the program.
+unconditional denoising in a same batch.
+
+This implementation of optimization does not require any modification to original Stable Diffusion code.
 
 ### Inpainting
 In img2img tab, draw a mask over a part of image, and that part will be in-painted.

webui.py

@@ -6,7 +6,10 @@ script_path = os.path.dirname(os.path.realpath(__file__))
 sd_path = os.path.dirname(script_path)
 
 # add parent directory to path; this is where Stable diffusion repo should be
-path_dirs = [(sd_path, 'ldm', 'Stable Diffusion'), ('../../taming-transformers', 'taming', 'Taming Transformers')]
+path_dirs = [
+    (sd_path, 'ldm', 'Stable Diffusion'),
+    ('../../taming-transformers', 'taming', 'Taming Transformers')
+]
 for d, must_exist, what in path_dirs:
     must_exist_path = os.path.abspath(os.path.join(script_path, d, must_exist))
     if not os.path.exists(must_exist_path):
@@ -38,15 +41,10 @@ from ldm.util import instantiate_from_config
 from ldm.models.diffusion.ddim import DDIMSampler
 from ldm.models.diffusion.plms import PLMSSampler
 
-# fix gradio phoning home
-gradio.utils.version_check = lambda: None
-gradio.utils.get_local_ip_address = lambda: '127.0.0.1'
-
 # this is a fix for Windows users. Without it, javascript files will be served with text/html content-type and the bowser will not show any UI
 mimetypes.init()
 mimetypes.add_type('application/javascript', '.js')
 
-
 # some of those options should not be changed at all because they would break the model, so I removed them from options.
 opt_C = 4
 opt_f = 8
@@ -65,14 +63,21 @@ parser.add_argument("--no-progressbar-hiding", action='store_true', help="do not
 parser.add_argument("--max-batch-count", type=int, default=16, help="maximum batch count value for the UI")
 parser.add_argument("--embeddings-dir", type=str, default='embeddings', help="embeddings dirtectory for textual inversion (default: embeddings)")
 parser.add_argument("--allow-code", action='store_true', help="allow custom script execution from webui")
-parser.add_argument("--lowvram", action='store_true', help="enamble stable diffusion model optimizations for low vram")
+parser.add_argument("--medvram", action='store_true', help="enable stable diffusion model optimizations for sacrficing a little speed for low VRM usage")
+parser.add_argument("--lowvram", action='store_true', help="enable stable diffusion model optimizations for sacrficing a lot of speed for very low VRM usage")
 parser.add_argument("--precision", type=str, help="evaluate at this precision", choices=["full", "autocast"], default="autocast")
-
+parser.add_argument("--share", action='store_true', help="use share=True for gradio and make the UI accessible through their site (doesn't work for me but you might have better luck)")
 cmd_opts = parser.parse_args()
 
 cpu = torch.device("cpu")
 gpu = torch.device("cuda")
 device = gpu if torch.cuda.is_available() else cpu
+batch_cond_uncond = not (cmd_opts.lowvram or cmd_opts.medvram)
+
+if not cmd_opts.share:
+    # fix gradio phoning home
+    gradio.utils.version_check = lambda: None
+    gradio.utils.get_local_ip_address = lambda: '127.0.0.1'
 
 css_hide_progressbar = """
 .wrap .m-12 svg { display:none!important; }
@@ -294,9 +299,13 @@ def setup_for_low_vram(sd_model):
     sd_model.first_stage_model.decode = lambda z, de=sd_model.first_stage_model.decode: first_stage_model_decode_wrap(sd_model.first_stage_model, de, z)
     parents[sd_model.cond_stage_model.transformer] = sd_model.cond_stage_model
 
+    if cmd_opts.medvram:
+        sd_model.model.register_forward_pre_hook(send_me_to_gpu)
+    else:
+        diff_model = sd_model.model.diffusion_model
+
         # the third remaining model is still too big for 4GB, so we also do the same for its submodules
         # so that only one of them is in GPU at a time
-    diff_model = sd_model.model.diffusion_model
         stored = diff_model.input_blocks, diff_model.middle_block, diff_model.output_blocks, diff_model.time_embed
         diff_model.input_blocks, diff_model.middle_block, diff_model.output_blocks, diff_model.time_embed = None, None, None, None
         sd_model.model.to(device)
@@ -860,7 +869,7 @@ class VanillaStableDiffusionSampler:
     def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning):
         t_enc = int(min(p.denoising_strength, 0.999) * p.steps)
 
-        # existing code fail with cetin step counts, like 9
+        # existing code fails with cetin step counts, like 9
         try:
             self.sampler.make_schedule(ddim_num_steps=p.steps, verbose=False)
         except Exception:
@@ -887,13 +896,26 @@ class CFGDenoiser(nn.Module):
     def __init__(self, model):
         super().__init__()
         self.inner_model = model
+        self.mask = None
+        self.nmask = None
+        self.init_latent = None
 
     def forward(self, x, sigma, uncond, cond, cond_scale):
+        if batch_cond_uncond:
             x_in = torch.cat([x] * 2)
             sigma_in = torch.cat([sigma] * 2)
             cond_in = torch.cat([uncond, cond])
             uncond, cond = self.inner_model(x_in, sigma_in, cond=cond_in).chunk(2)
-        return uncond + (cond - uncond) * cond_scale
+            denoised = uncond + (cond - uncond) * cond_scale
+        else:
+            uncond = self.inner_model(x, sigma, cond=uncond)
+            cond = self.inner_model(x, sigma, cond=cond)
+            denoised = uncond + (cond - uncond) * cond_scale
+
+        if self.mask is not None:
+            denoised = self.init_latent * self.mask + self.nmask * denoised
+
+        return denoised
 
 
 class KDiffusionSampler:
@@ -910,19 +932,13 @@ class KDiffusionSampler:
 
         xi = x + noise
 
-        if p.mask is not None:
-            if p.inpainting_fill == 2:
-                xi = xi * p.mask + noise * p.nmask
-            elif p.inpainting_fill == 3:
-                xi = xi * p.mask
-
         sigma_sched = sigmas[p.steps - t_enc - 1:]
 
-        def mask_cb(v):
+        self.model_wrap_cfg.mask = p.mask
-            v["denoised"][:] = v["denoised"][:] * p.nmask + p.init_latent * p.mask
+        self.model_wrap_cfg.nmask = p.nmask
-
+        self.model_wrap_cfg.init_latent = p.init_latent
-        return self.func(self.model_wrap_cfg, xi, sigma_sched, extra_args={'cond': conditioning, 'uncond': unconditional_conditioning, 'cond_scale': p.cfg_scale}, disable=False, callback=mask_cb if p.mask is not None else None)
 
+        return self.func(self.model_wrap_cfg, xi, sigma_sched, extra_args={'cond': conditioning, 'uncond': unconditional_conditioning, 'cond_scale': p.cfg_scale}, disable=False)
 
     def sample(self, p: StableDiffusionProcessing, x, conditioning, unconditional_conditioning):
         sigmas = self.model_wrap.get_sigmas(p.steps)
@@ -1315,7 +1331,6 @@ class StableDiffusionProcessingImg2Img(StableDiffusionProcessing):
             if self.mask_blur > 0:
                 self.image_mask = self.image_mask.filter(ImageFilter.GaussianBlur(self.mask_blur)).convert('L')
 
-
             if self.inpaint_full_res:
                 self.mask_for_overlay = self.image_mask
                 mask = self.image_mask.convert('L')
@@ -1383,6 +1398,13 @@ class StableDiffusionProcessingImg2Img(StableDiffusionProcessing):
             self.nmask = torch.asarray(latmask).to(device).type(sd_model.dtype)
 
     def sample(self, x, conditioning, unconditional_conditioning):
+
+        if self.mask is not None:
+            if self.inpainting_fill == 2:
+                x = x * self.mask + create_random_tensors(x.shape[1:], [self.seed + x + 1 for x in range(x.shape[0])]) * self.nmask
+            elif self.inpainting_fill == 3:
+                x = x * self.mask
+
         samples = self.sampler.sample_img2img(self, self.init_latent, x, conditioning, unconditional_conditioning)
 
         if self.mask is not None:
@@ -1805,10 +1827,10 @@ sd_config = OmegaConf.load(cmd_opts.config)
 sd_model = load_model_from_config(sd_config, cmd_opts.ckpt)
 sd_model = (sd_model if cmd_opts.no_half else sd_model.half())
 
-if not cmd_opts.lowvram:
+if cmd_opts.lowvram or cmd_opts.medvram:
-    sd_model = sd_model.to(device)
-else:
     setup_for_low_vram(sd_model)
+else:
+    sd_model = sd_model.to(device)
 
 model_hijack = StableDiffusionModelHijack()
 model_hijack.hijack(sd_model)
@@ -1855,5 +1877,5 @@ def inject_gradio_html(javascript):
 inject_gradio_html(javascript)
 
 demo.queue(concurrency_count=1)
-demo.launch()
+demo.launch(share=cmd_opts.share)