feat: add the GPU card

1 files changed, 73 insertions, 0 deletions

diff --git a/widgets/gpu.lua b/widgets/gpu.lua
new file mode 100644
index 0000000..5f289a0
--- /dev/null
+++ b/widgets/gpu.lua
@@ -0,0 +1,73 @@
+-- GPU: Arc B580 temperatures and fan speed.
+--
+-- No utilisation figure, deliberately. The xe driver exposes no
+-- gpu_busy_percent, intel_gpu_top refuses the device outright ("Detected Xe
+-- device which is not supported"), and gputop prints per-process rows with
+-- ANSI escapes, which is not an interface to build a widget on. The card shows
+-- what the hardware actually reports rather than inventing a number.
+--
+-- The integrated AMD GPU does expose gpu_busy_percent and is deliberately not
+-- shown: the discrete card is the one in use.
+
+local card = require 'lib.card'
+local data = require 'lib.data'
+
+local M = {}
+
+-- chip, file, label, warn, crit
+local TEMPS = {
+  { 'xe', 'temp2_input', 'PKG',  75, 85 },
+  { 'xe', 'temp3_input', 'VRAM', 80, 90 },
+}
+
+function M.draw(cr, rect, colors)
+  local inner = card.card(cr, rect, colors)
+  local function clamp(v, lo, hi) return math.max(lo, math.min(hi, v)) end
+
+  local label_size = clamp(inner.w * 0.030, 11, 18)
+  local big_size   = clamp(inner.w * 0.085, 26, 56)
+  local row_size   = clamp(inner.w * 0.030, 11, 17)
+
+  local y = inner.y
+
+  card.font(cr, card.FONT_MONO, label_size, false)
+  card.rgba(cr, colors.label)
+  card.text(cr, inner.x, y + label_size, 'GPU')
+  card.rgba(cr, colors.value)
+  card.text_right(cr, inner.x + inner.w, y + label_size, 'ARC B580')
+
+  -- The package temperature is the headline, since there is no load to show.
+  local pkg = data.sensor('xe', 'temp2_input')
+  card.font(cr, card.FONT_HEAVY, big_size, false)
+  card.rgba(cr, pkg and card.threshold(pkg, 75, 85, colors) or colors.label)
+  card.text(cr, inner.x, y + label_size + big_size,
+    pkg and string.format('%d\u{00B0}', pkg) or '--')
+
+  local ey = y + label_size + big_size + 18
+  local step = row_size * 1.9
+
+  card.font(cr, card.FONT_MONO, row_size, false)
+  for _, t in ipairs(TEMPS) do
+    if ey + step > inner.y + inner.h then break end
+    local v = data.sensor(t[1], t[2])
+    card.rgba(cr, colors.label)
+    card.text(cr, inner.x, ey, t[3])
+    card.rgba(cr, v and card.threshold(v, t[4], t[5], colors) or colors.label)
+    card.text_right(cr, inner.x + inner.w, ey,
+      v and string.format('%d\u{00B0}', v) or '--')
+    ey = ey + step
+  end
+
+  -- Fan RPM is not a temperature, so it carries no threshold colour: a fast
+  -- fan is the cooling working, not a fault.
+  if ey + step <= inner.y + inner.h then
+    local rpm = data.sensor_raw('xe', 'fan1_input')
+    card.rgba(cr, colors.label)
+    card.text(cr, inner.x, ey, 'FAN')
+    card.rgba(cr, colors.value)
+    card.text_right(cr, inner.x + inner.w, ey,
+      rpm and string.format('%d RPM', rpm) or '--')
+  end
+end
+
+return M