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font.4th: TEXT entry point, UTF-8 string rendering (item 4.3.6f)

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Punch list §25 item 4.3.6f complete. TEXT ( c-addr u x y size color -- )
walks a UTF-8 byte string, decoding one codepoint at a time via
DECODE-UTF8, drawing each via DRAW-GLYPH, and accumulating the cursor
X by the glyph's em-advance scaled to pixels. Uses 2>R/2R> to stash
the DECODE-UTF8 remainder off the data stack while DRAW-GLYPH's args
are pushed.

Defined in font.4th, not fabric.4th, so its compiled DRAW-GLYPH call
binds to the real definition, not fabric.4th's 4.3.6b placeholder --
same early-binding constraint as DISPATCH-GLYPH itself.

Verified live: a string mixing ASCII, Latin-1 (degree sign), and
General Punctuation (em dash) renders correctly in one TEXT call with
proportional spacing, no overlap.

Three-arch acceptance boot clean, Stadium conservation unchanged.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Robert Allan James
2026-08-09 20:46:55 -04:00
co-authored by Claude Sonnet 5
parent aee09cac0a
commit 2960989100
13 changed files with 54937 additions and 145 deletions
Download Patch File Download Diff File Expand all files Collapse all files
experiments/bare_metal/latest/aarch64.csv
+26 -26
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@@ -79,32 +79,32 @@ tick_number,elapsed_ns,tick_interval_ns,cache_hits_delta,bucket_hits_delta,word_
5,50000,10000,0,0,92,25,8,4096,2,0,0,19,65536,0,0,65536,0,0
6,60000,10000,0,0,64,27,8,4096,2,0,0,20,65536,0,0,65536,0,0
7,70000,10000,0,0,228,32,8,4096,210,0,0,26,65536,0,0,65536,0,0
8,80000,10000,0,0,256,34,9,4096,466,0,0,33,65536,0,0,65536,0,0
8,80000,10000,0,0,256,34,9,4096,466,0,0,32,65536,0,0,65536,0,0
9,90000,10000,0,0,256,36,10,4096,722,0,0,39,65536,0,0,65536,0,0
10,100000,10000,0,0,256,36,11,4096,978,0,0,45,65536,0,0,65536,0,0
11,110000,10000,0,0,256,36,11,4096,1234,0,0,51,65536,0,0,65536,0,0
12,120000,10000,0,0,256,36,12,4096,1490,0,0,57,65536,0,0,65536,0,0
13,130000,10000,0,0,256,37,12,4096,1746,0,0,65,65536,0,0,65536,0,0
14,140000,10000,0,0,230,39,12,4096,1949,0,0,75,65536,0,0,65536,0,0
15,150000,10000,0,0,256,39,13,4096,2204,0,0,87,65536,0,0,65536,0,0
16,160000,10000,0,0,256,39,14,4096,2459,0,0,95,65536,0,0,65536,0,0
17,170000,10000,0,0,256,39,15,4096,2713,0,0,104,65536,0,0,65536,0,0
18,180000,10000,0,0,256,39,15,4096,2969,0,0,113,65536,0,0,65536,0,0
19,190000,10000,0,0,256,39,16,4096,3224,0,0,119,65536,0,1,65536,0,0
20,200000,10000,0,0,256,41,17,4096,3480,0,0,125,65536,0,1,65536,0,0
21,210000,10000,0,0,256,41,17,4096,3736,0,0,132,65536,0,1,65536,0,0
22,220000,10000,0,0,256,41,18,4096,3992,0,0,139,65536,0,1,65536,0,0
23,230000,10000,0,0,256,41,19,4096,4096,0,0,145,65536,0,1,65536,0,0
24,240000,10000,0,0,256,41,20,4096,4096,0,0,151,65536,0,1,65536,0,0
25,250000,10000,0,0,256,43,20,2048,2048,0,0,158,65536,0,1,65536,0,0
26,260000,10000,0,0,256,45,21,2048,2048,0,0,164,65536,0,1,65536,0,0
27,270000,10000,0,0,256,45,22,1024,1024,0,0,170,65536,0,1,65536,0,0
28,280000,10000,0,0,256,45,23,1024,1024,0,0,176,65536,0,1,65536,0,0
29,290000,10000,0,0,256,45,24,512,512,0,0,183,65536,0,1,65536,0,0
30,300000,10000,0,0,256,45,24,512,512,0,0,189,65536,0,1,65536,0,0
31,310000,10000,0,0,256,45,25,256,256,0,0,196,65536,0,1,65536,0,0
32,320000,10000,0,0,255,45,26,256,256,0,0,202,65536,0,1,65536,0,0
33,330000,10000,0,0,256,45,27,256,256,0,0,208,65536,0,1,65536,0,0
34,340000,10000,0,0,256,45,27,256,256,0,0,216,65536,0,1,65536,0,0
35,350000,10000,0,0,256,45,28,256,256,0,0,223,65536,0,1,65536,0,0
36,360000,10000,0,0,256,45,29,256,256,0,0,229,65536,0,1,65536,0,0
12,120000,10000,0,0,256,36,12,4096,1490,0,0,58,65536,0,0,65536,0,0
13,130000,10000,0,0,256,37,12,4096,1746,0,0,64,65536,0,0,65536,0,0
14,140000,10000,0,0,230,39,12,4096,1949,0,0,70,65536,0,0,65536,0,0
15,150000,10000,0,0,256,39,13,4096,2204,0,0,77,65536,0,0,65536,0,0
16,160000,10000,0,0,256,39,14,4096,2459,0,0,83,65536,0,0,65536,0,0
17,170000,10000,0,0,256,39,15,4096,2713,0,0,90,65536,0,0,65536,0,0
18,180000,10000,0,0,256,39,15,4096,2969,0,0,96,65536,0,0,65536,0,0
19,190000,10000,0,0,256,39,16,4096,3224,0,0,102,65536,0,1,65536,0,0
20,200000,10000,0,0,256,41,17,4096,3480,0,0,109,65536,0,1,65536,0,0
21,210000,10000,0,0,256,41,17,4096,3736,0,0,117,65536,0,1,65536,0,0
22,220000,10000,0,0,256,41,18,4096,3992,0,0,123,65536,0,1,65536,0,0
23,230000,10000,0,0,256,41,19,4096,4096,0,0,130,65536,0,1,65536,0,0
24,240000,10000,0,0,256,41,20,4096,4096,0,0,136,65536,0,1,65536,0,0
25,250000,10000,0,0,256,43,20,2048,2048,0,0,143,65536,0,1,65536,0,0
26,260000,10000,0,0,256,45,21,2048,2048,0,0,149,65536,0,1,65536,0,0
27,270000,10000,0,0,256,45,22,1024,1024,0,0,156,65536,0,1,65536,0,0
28,280000,10000,0,0,256,45,23,1024,1024,0,0,162,65536,0,1,65536,0,0
29,290000,10000,0,0,256,45,24,512,512,0,0,168,65536,0,1,65536,0,0
30,300000,10000,0,0,256,45,24,512,512,0,0,175,65536,0,1,65536,0,0
31,310000,10000,0,0,256,45,25,256,256,0,0,181,65536,0,1,65536,0,0
32,320000,10000,0,0,255,45,26,256,256,0,0,187,65536,0,1,65536,0,0
33,330000,10000,0,0,256,45,27,256,256,0,0,193,65536,0,1,65536,0,0
34,340000,10000,0,0,256,45,27,256,256,0,0,200,65536,0,1,65536,0,0
35,350000,10000,0,0,256,45,28,256,256,0,0,206,65536,0,1,65536,0,0
36,360000,10000,0,0,256,45,29,256,256,0,0,212,65536,0,1,65536,0,0
1 tick_number elapsed_ns tick_interval_ns cache_hits_delta bucket_hits_delta word_executions_delta hot_word_count avg_word_heat_q48 window_width actual_window_size predicted_label_hits jitter_bits apic_ticks time_trust_q48 variance_q48 vm_call_depth_max hera_heat_q48 hermes_heat_q48 artemis_heat_q48
79 5 50000 10000 0 0 92 25 8 4096 2 0 0 19 65536 0 0 65536 0 0
80 6 60000 10000 0 0 64 27 8 4096 2 0 0 20 65536 0 0 65536 0 0
81 7 70000 10000 0 0 228 32 8 4096 210 0 0 26 65536 0 0 65536 0 0
82 8 80000 10000 0 0 256 34 9 4096 466 0 0 33 32 65536 0 0 65536 0 0
83 9 90000 10000 0 0 256 36 10 4096 722 0 0 39 65536 0 0 65536 0 0
84 10 100000 10000 0 0 256 36 11 4096 978 0 0 45 65536 0 0 65536 0 0
85 11 110000 10000 0 0 256 36 11 4096 1234 0 0 51 65536 0 0 65536 0 0
86 12 120000 10000 0 0 256 36 12 4096 1490 0 0 57 58 65536 0 0 65536 0 0
87 13 130000 10000 0 0 256 37 12 4096 1746 0 0 65 64 65536 0 0 65536 0 0
88 14 140000 10000 0 0 230 39 12 4096 1949 0 0 75 70 65536 0 0 65536 0 0
89 15 150000 10000 0 0 256 39 13 4096 2204 0 0 87 77 65536 0 0 65536 0 0
90 16 160000 10000 0 0 256 39 14 4096 2459 0 0 95 83 65536 0 0 65536 0 0
91 17 170000 10000 0 0 256 39 15 4096 2713 0 0 104 90 65536 0 0 65536 0 0
92 18 180000 10000 0 0 256 39 15 4096 2969 0 0 113 96 65536 0 0 65536 0 0
93 19 190000 10000 0 0 256 39 16 4096 3224 0 0 119 102 65536 0 1 65536 0 0
94 20 200000 10000 0 0 256 41 17 4096 3480 0 0 125 109 65536 0 1 65536 0 0
95 21 210000 10000 0 0 256 41 17 4096 3736 0 0 132 117 65536 0 1 65536 0 0
96 22 220000 10000 0 0 256 41 18 4096 3992 0 0 139 123 65536 0 1 65536 0 0
97 23 230000 10000 0 0 256 41 19 4096 4096 0 0 145 130 65536 0 1 65536 0 0
98 24 240000 10000 0 0 256 41 20 4096 4096 0 0 151 136 65536 0 1 65536 0 0
99 25 250000 10000 0 0 256 43 20 2048 2048 0 0 158 143 65536 0 1 65536 0 0
100 26 260000 10000 0 0 256 45 21 2048 2048 0 0 164 149 65536 0 1 65536 0 0
101 27 270000 10000 0 0 256 45 22 1024 1024 0 0 170 156 65536 0 1 65536 0 0
102 28 280000 10000 0 0 256 45 23 1024 1024 0 0 176 162 65536 0 1 65536 0 0
103 29 290000 10000 0 0 256 45 24 512 512 0 0 183 168 65536 0 1 65536 0 0
104 30 300000 10000 0 0 256 45 24 512 512 0 0 189 175 65536 0 1 65536 0 0
105 31 310000 10000 0 0 256 45 25 256 256 0 0 196 181 65536 0 1 65536 0 0
106 32 320000 10000 0 0 255 45 26 256 256 0 0 202 187 65536 0 1 65536 0 0
107 33 330000 10000 0 0 256 45 27 256 256 0 0 208 193 65536 0 1 65536 0 0
108 34 340000 10000 0 0 256 45 27 256 256 0 0 216 200 65536 0 1 65536 0 0
109 35 350000 10000 0 0 256 45 28 256 256 0 0 223 206 65536 0 1 65536 0 0
110 36 360000 10000 0 0 256 45 29 256 256 0 0 229 212 65536 0 1 65536 0 0