eeshow/kicad/: begin text support for page layout (WIP); add missing pl-common.h

eeshow/kicad/pl-common.h

@@ -0,0 +1,52 @@
+/*
+ * kicad/pl-common.h - Shared definitions for KiCad page layout handling
+ *
+ * Written 2016 by Werner Almesberger
+ * Copyright 2016 by Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#ifndef KICAD_PL_COMMON_H
+#define	KICAD_PL_COMMON_H
+
+#include "kicad/sexpr.h"
+
+
+enum font_flag {
+	font_bold	= 1 << 0,
+	font_italic	= 1 << 1,
+};
+
+
+struct pl_obj {
+	enum pl_obj_type {
+		pl_obj_rect,
+		pl_obj_line,
+		pl_obj_text,
+	} type;
+
+	const char *s;          /* tbtext */
+	int repeat;		/* line, rect, tbtext */
+	float x, y;             /* line, rect, tbtext */
+	int dx, dy;
+	float ex, ey;           /* line, rect; font size for tbtext */
+	int edx, edy;
+	float incrx, incry;
+	int incrlabel;		/* tbtext */
+	int font;		/* tbtext (flags) */
+
+	struct pl_obj *next;
+};
+
+struct pl_ctx {
+	struct sexpr_ctx *sexpr_ctx;
+	float l, r, t, b;	/* margins */
+	struct pl_obj *objs;
+};
+
+#endif /* !KICAD_PL_COMMON_H */

eeshow/kicad/pl-parse.c

@@ -140,6 +140,43 @@ static bool process_setup(struct pl_ctx *p, const struct expr *e)
 }
 
 
+static bool process_font(struct pl_obj *obj, const struct expr *e)
+{
+	const char *s;
+	const struct expr *next;
+
+	for (; e; e = e->next) {
+		if (e->s) {
+			if (!strcmp(e->s, "bold"))
+				obj->font |= font_bold;
+			else if (!strcmp(e->s, "italic"))
+				obj->font |= font_italic;
+			else
+				warning("ignoring \"%s\"\n", e->s);
+			continue;
+		}
+
+		if (!e->e) {
+			warning("ignoring empty list\n");
+			continue;
+		}
+		s = e->e->s;
+		next = e->e->next;
+
+		if (!strcmp(s, "comment"))
+			continue;
+
+		if (!strcmp(s, "size")) {
+			if (!get_coord(next, &obj->ex, &obj->ey,
+			    &obj->edx, &obj->edy))
+				return 0;
+		} else
+			warning("ignoring \"%s\"\n", s);
+	}
+	return 1;
+}
+
+
 static bool process_obj(struct pl_ctx *pl, const struct expr *e,
     enum pl_obj_type type)
 {
@@ -156,10 +193,19 @@ static bool process_obj(struct pl_ctx *pl, const struct expr *e,
 	obj->incrx = 0;
 	obj->incry = 0;
 	obj->incrlabel = 0;
+	obj->font = 0;
 
 	for (; e; e = e->next) {
+		if (e->s) {
+			if (obj->s) {
+				error("multiple strings\n");
+				return 0;
+			}
+			obj->s = stralloc(e->s);
+			continue;
+		}
 		if (!e->e) {
-			warning("ignoring non-list\n");
+			warning("ignoring empty list\n");
 			continue;
 		}
 
@@ -193,6 +239,9 @@ static bool process_obj(struct pl_ctx *pl, const struct expr *e,
 		} else if (!strcmp(s, "incrlabel")) {
 			if (!get_int(next, &obj->incrlabel))
 				return 0;
+		} else if (!strcmp(s, "font")) {
+			if (!process_font(obj, next))
+				return 0;
 		} else
 			warning("ignoring \"%s\"\n", s);
 	}

eeshow/kicad/pl-render.c

@@ -18,6 +18,7 @@
 #include "misc/util.h"
 #include "misc/diag.h"
 #include "gfx/style.h"
+#include "gfx/text.h"
 #include "gfx/gfx.h"
 #include "kicad/pl-common.h"
 #include "kicad/pl.h"
@@ -35,15 +36,9 @@ static int mil(float mm)
 }
 
 
-static int cx(int x, int dx, int xo, int xe)
+static int coord(int v, int d, int o, int e)
 {
-	return dx >= 0 ? xo + x : xe - x;
-}
-
-
-static int cy(int y, int dy, int yo, int ye)
-{
-	return dy >= 0 ? yo + y : ye - y;
+	return d >= 0 ? o + v : e - v;
 }
 
 
@@ -66,27 +61,28 @@ static void render_obj(const struct pl_ctx *pl, const struct pl_obj *obj,
 	if (x > ww || y > hh || ex > ww || ey > hh)
 		return;
 
+	x = coord(x, obj->dx, xo, xe);
+	y = coord(y, obj->dy, yo, ye);
+	ex = coord(ex, obj->edx, xo, xe);
+	ey = coord(ey, obj->edy, yo, ye);
+
 	switch (obj->type) {
 	case pl_obj_rect:
-		gfx_rect(
-		    cx(x, obj->dx, xo, xe), cy(y, obj->dy, yo, ye),
-	    	    cx(ex, obj->edx, xo, xe), cy(ey, obj->edy, yo, ye),
+		gfx_rect(x, y, ex, ey,
 		    COLOR_COMP_DWG, COLOR_NONE, LAYER_COMP_DWG);
 		break;
 	case pl_obj_line: {
-			int vx[] = {
-			    cx(x, obj->dx, xo, xe),
-			    cx(ex, obj->edx, xo, xe)
-			};
-			int vy[] = {
-			    cy(y, obj->dy, yo, ye),
-			    cy(ey, obj->edy, yo, ye)
-			};
+			int vx[] = { x, ex };
+			int vy[] = { y, ey };
 
 			gfx_poly(2, vx, vy,
 			    COLOR_COMP_DWG, COLOR_NONE, LAYER_COMP_DWG);
 		}
 		break;
+	case pl_obj_text:
+		gfx_text(x, y, obj->s, mil(obj->ey), text_min, 0,
+		    COLOR_COMP_DWG, LAYER_COMP_DWG);
+		break;
 	default:
 		break;
 	}