X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=graph.py;fp=graph.py;h=97de6d108daf435553fe8cb22c3c427a1af391fe;hb=00b2d5ed01fb523fbc4e699f0419329efbee0ea8;hp=0000000000000000000000000000000000000000;hpb=27dd45177a8552a8b8c9e3a4d9388844fa1d4d27;p=picoclvr.git

diff --git a/graph.py b/graph.py
new file mode 100755
index 0000000..97de6d1
--- /dev/null
+++ b/graph.py
@@ -0,0 +1,115 @@
+#!/usr/bin/env python
+
+import math
+
+import torch, torchvision
+
+from torch import nn
+from torch.nn import functional as F
+
+import cairo
+
+
+######################################################################
+def save_attention_image(
+    filename,
+    tokens,
+    attention,
+    surface_width=128,
+    surface_height=96,
+    pixel_scale=8,
+    x=10,
+    y=10,
+    token_gap=15,
+    layer_gap=25,
+    y_eps=1,
+    min_att=1e-2,
+):
+    # surface = cairo.PDFSurface(
+    # filename, surface_width * pixel_scale, surface_height * pixel_scale
+    # )
+
+    surface = cairo.RecordingSurface(cairo.CONTENT_COLOR_ALPHA, None)
+
+    ctx = cairo.Context(surface)
+    ctx.scale(pixel_scale, pixel_scale)
+
+    ctx.set_source_rgb(0.0, 0.0, 0.0)
+    ctx.set_font_size(4.0)
+    # ctx.select_font_face("Arial", cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
+
+    u = []
+    for n, t in enumerate(tokens):
+        string = str(t)
+        (
+            x_bearing,
+            y_bearing,
+            width_t,
+            height_t,
+            x_advance,
+            y_advance,
+        ) = ctx.text_extents(string)
+        u.append((n, string, x, x + width_t / 2, height_t, y_bearing))
+        x += x_advance + token_gap
+    tokens = u
+
+    for d in range(attention.size(0) + 1):
+        for n, s, x, xc, h, yb in tokens:
+            # ctx.set_source_rgb(0.0, 0.0, 0.0)
+            # ctx.rectangle(x+x_bearing,y+y_bearing,width_t,height_t)
+            # ctx.stroke()
+            ctx.set_source_rgb(0.0, 0.0, 0.0)
+            ctx.move_to(x, y)
+            ctx.show_text(s)
+            # x += x_advance + 1
+            if d < attention.size(0):
+                for m, _, _, x2c, h2, y2b in tokens:
+                    if attention[d, n, m] >= min_att:
+                        c = 1 - attention[d, n, m]
+                        ctx.set_source_rgb(c, c, c)
+                        ctx.set_line_width(0.5)
+                        ctx.move_to(xc, y + yb + h + y_eps)
+                        ctx.line_to(x2c, y + layer_gap + y2b - y_eps)
+                        ctx.stroke()
+        y += layer_gap
+
+    x, y, width, height = surface.ink_extents()
+    pdf_surface = cairo.PDFSurface(filename, width, height)
+    ctx_pdf = cairo.Context(pdf_surface)
+    ctx_pdf.set_source_surface(surface, -x, -y)
+    ctx_pdf.paint()
+    pdf_surface.finish()
+
+
+######################################################################
+
+if __name__ == "__main__":
+    import mygpt
+
+    vocabulary_size = 3
+    x = torch.randint(vocabulary_size, (1, 5))
+
+    model = mygpt.MyGPT(
+        vocabulary_size=vocabulary_size,
+        dim_model=4,
+        dim_keys=2,
+        dim_hidden=2,
+        nb_heads=2,
+        nb_blocks=3,
+        dropout=0.1,
+        causal=True,
+    )
+
+    model.eval()
+    model.record_attention()
+
+    y1 = model(mygpt.BracketedSequence(x)).x
+
+    a = model.retrieve_attention()
+    print(a)
+    attention = torch.cat([x[:0] for x in a], dim=0)
+
+    tokens = ["bluh", 2, 3, 4, "blih"]
+    attention = torch.randn(3, len(tokens), len(tokens)).softmax(dim=-1)
+
+    save_attention_image("attention.pdf", tokens, attention)