Create Solder Paste Layers/Gerber Files

docs/CIRCUIT_JSON_PCB_OVERVIEW.md

@@ -134,7 +134,24 @@ export interface PcbPlatedHoleOval {
   pcb_plated_hole_id: string
 }
 
-export type PcbPlatedHole = PcbPlatedHoleCircle | PcbPlatedHoleOval
+export interface PcbHoleCircularWithRectPad {
+  type: "pcb_plated_hole"
+  shape: "circular_hole_with_rect_pad"
+  hole_shape: "circle"
+  pad_shape: "rect"
+  hole_diameter: number
+  rect_pad_width: number
+  rect_pad_height: number 
+  x: Distance
+  y: Distance
+  layers: LayerRef[]
+  port_hints?: string[]
+  pcb_component_id?: string
+  pcb_port_id?: string
+  pcb_plated_hole_id: string
+}
+
+export type PcbPlatedHole = PcbPlatedHoleCircle | PcbPlatedHoleOval | PcbHoleCircularWithRectPad
 
 export interface PcbFabricationNoteText {
   type: "pcb_fabrication_note_text"

tests/gerber/generate-gerber-with-paste.test.tsx

@@ -0,0 +1,83 @@
+import { test, expect } from "bun:test"
+import { convertSoupToGerberCommands } from "src/gerber/convert-soup-to-gerber-commands"
+import {
+  convertSoupToExcellonDrillCommands,
+  stringifyExcellonDrill,
+} from "src/excellon-drill"
+import { stringifyGerberCommandLayers } from "src/gerber/stringify-gerber"
+import { maybeOutputGerber } from "tests/fixtures/maybe-output-gerber"
+import { Circuit } from "@tscircuit/core"
+
+test("Generate gerber with paste layers", async () => {
+  const circuit = new Circuit()
+  circuit.add(
+    <board width={10} height={10}>
+      {/* Top layer pads */}
+      <smtpad
+        shape="rect"
+        width={1}
+        height={1.5}
+        layer="top"
+        pcbX={-2}
+        pcbY={2}
+      />
+      <smtpad
+        shape="circle"
+        radius={0.75}
+        layer="top"
+        pcbX={2}
+        pcbY={2}
+      />
+
+      {/* Bottom layer pads */}
+      <smtpad
+        shape="rect"
+        width={1.5}
+        height={1}
+        layer="bottom"
+        pcbX={-2}
+        pcbY={-2}
+      />
+      <smtpad
+        shape="circle"
+        radius={0.5}
+        layer="bottom"
+        pcbX={2}
+        pcbY={-2}
+      />
+    </board>,
+  )
+
+  const circuitJson = circuit.getCircuitJson()
+
+  // Generate commands
+  const gerber_cmds = convertSoupToGerberCommands(circuitJson)
+  const excellon_drill_cmds_plated = convertSoupToExcellonDrillCommands({
+    circuitJson: circuitJson,
+    is_plated: true, // Paste usually goes with plated holes
+  })
+  const excellon_drill_cmds_unplated = convertSoupToExcellonDrillCommands({
+    circuitJson: circuitJson,
+    is_plated: false,
+  })
+
+  // Stringify outputs
+  const gerberOutput = stringifyGerberCommandLayers(gerber_cmds)
+  const excellonDrillOutputPlated = stringifyExcellonDrill(
+    excellon_drill_cmds_plated,
+  )
+  const excellonDrillOutputUnplated = stringifyExcellonDrill(
+    excellon_drill_cmds_unplated,
+  )
+
+  // Optionally write files for debugging
+  await maybeOutputGerber(gerberOutput, excellonDrillOutputPlated)
+
+  // Assert against snapshot
+  // This will generate SVGs for each layer, including F_Paste and B_Paste
+  expect({
+    ...gerberOutput,
+    "drill_plated.drl": excellonDrillOutputPlated,
+    "drill_unplated.drl": excellonDrillOutputUnplated,
+  }).toMatchGerberSnapshot(import.meta.path, "paste-layer")
+})