added src/, updated README.md

5 files changed, 234 insertions, 0 deletions

diff --git a/src/color.h b/src/color.h
new file mode 100644
index 0000000..e2b4cc0
--- /dev/null
+++ b/src/color.h
@@ -0,0 +1,18 @@
+ int set_color(cairo_t *c, char *str) {
+ 	if (strcmp("BLACK", str) == 0) {
+ 		cairo_set_source_rgb (c, 0.0, 0.0, 0.0);
+ 	}
+ 	if (strcmp("RED", str) == 0) {
+ 		cairo_set_source_rgb (c, 255.0, 0.0, 0.0);
+ 	}
+ 	if (strcmp("GREEN", str) == 0) {
+ 		cairo_set_source_rgb (c, 0.0, 255.0, 0.0);
+ 	}
+ 	if (strcmp("BLUE", str) == 0) {
+ 		cairo_set_source_rgb (c, 0.0, 0.0, 255.0);
+ 	}
+ 	if (strcmp("GREY", str) == 0) {
+ 		cairo_set_source_rgb (c, 128.0, 128.0, 128.0);
+ 	}
+ 	return(0);
+ }
diff --git a/src/date.h b/src/date.h
new file mode 100644
index 0000000..4ff3d32
--- /dev/null
+++ b/src/date.h
@@ -0,0 +1 @@
+/* date.h: Includes all the functions relating to calculating months, days, etc. */
diff --git a/src/draw.c b/src/draw.c
new file mode 100644
index 0000000..51f9367
--- /dev/null
+++ b/src/draw.c
@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <cairo/cairo.h>
+
+struct dimensions {
+	double pw; 	/* paper width */
+	double ph;	/* paper height */
+	double mw;	/* month width */
+	double mh;	/* month height */
+	double bw;	/* day box width */
+	double bh;	/* day box height */
+	double r;	/* rows */
+	double c;	/* columns */
+	double m;	/* margin */
+};
+
+
+int draw_calendar(cairo_t *c, double x, double y, struct dimensions d) {
+	double x1, y1, x2, y2;
+	x1 = x;
+	y1 = y;
+	x2 = d.pw - x1; /* Set the line endpoint to right side of the page */
+
+	for (int i = 0; i < d.r + 1; i++) { /* Draw Horizontal Lines */
+		cairo_move_to (c, x, y);
+		cairo_line_to (c, x2, y);
+		y = y + d.bh;
+	}
+
+	x = x1;
+	y = y1;
+	y2 = y1 + d.mh; /* Set the line endpoint as the bottom of the month */
+	for (int i = 0; i < d.c + 1; i++) { /* Draw Vertical Lines */
+		cairo_move_to (c, x, y);
+		cairo_line_to (c, x, y2);
+		x = x + d.bw;
+	}
+	cairo_stroke(c);
+	return(0);
+}
+
+
+
+int draw_numbers(cairo_t *c, double x, double y, struct dimensions d, int wd, int nd) {
+	char str[20];
+	cairo_text_extents_t te;
+	cairo_font_extents_t fe;
+
+	cairo_select_font_face (c, "sans-serif",
+			CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
+	cairo_set_font_size (c, d.bw / 2);
+
+	int iterative = 0;
+	cairo_font_extents (c, &fe);
+	double xi = x; 
+	int current_weekday = wd;
+	x = d.m + (wd * d.bw);
+	for (int j = 0; j < d.r; j++) {
+		y = y + d.bh - ((d.bh - fe.ascent) / 2);
+		for (int k = current_weekday; k < d.c; k++) {
+			if (iterative < nd) {
+				snprintf(str, sizeof(str), "%d", iterative + 1);
+				cairo_text_extents (c, str, &te);
+				double box_margins = (d.bw - te.width) / 2;
+
+				cairo_move_to(c, x + box_margins - te.x_bearing, y); /* center the number within the box */
+				cairo_show_text(c, str);
+				cairo_move_to(c, x, y); /* Sort of backtrack to realign with the spacing of the boxes */
+				x = x + d.bw;
+				iterative++;
+				current_weekday++;
+			}
+		}
+		current_weekday = 0;
+		y = y - (d.bh - ((d.bh - fe.ascent) / 2));
+		y = y + d.bh;
+		x = xi;
+	}
+	return(0);
+}
+
+
+
+int draw_month_name(cairo_t *c, char *name, struct dimensions d) {
+	double x, y = d.m;
+	cairo_set_font_size(c, 1.0);
+	cairo_text_extents_t te;
+	cairo_text_extents(c, name, &te);
+	x = (d.pw / 2) - (te.width / 2);
+	y = 1.5;
+	cairo_move_to(c, x, y);
+	cairo_show_text(c, &name[0]);
+	return(0);
+}
+
diff --git a/src/draw.h b/src/draw.h
new file mode 100644
index 0000000..7c473a7
--- /dev/null
+++ b/src/draw.h
@@ -0,0 +1,24 @@
+struct dimensions {
+	double pw; 	/* paper width */
+	double ph;	/* paper height */
+	double mw;	/* month width */
+	double mh;	/* month height */
+	double bw;	/* day box width */
+	double bh;	/* day box height */
+	double r;	/* rows */
+	double c;	/* columns */
+	double m;	/* margin */
+};
+
+
+
+int draw_calendar(cairo_t *c, double x, double y, struct dimensions d);
+
+
+
+
+int draw_numbers(cairo_t *c, double x, double y, struct dimensions d, int wd, int nd);
+
+
+
+int draw_month_name(cairo_t *c, char *name, struct dimensions d);
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..6d76a6d
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,97 @@
+/* Standard Libraries */
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <time.h>
+
+/* Cairo Libraries */
+#include <cairo/cairo-pdf.h>
+#include <cairo/cairo.h>
+
+/* calp Libraries */
+#include "color.h"
+#include "date.h"
+#include "draw.h"
+
+// int main (int argc, char *argv[]) {
+int main (void) {
+	/* Dimension initialization */
+	int rows = 6;			/* Number of weeks in a month */
+	int columns = 7;		/* Number of days in a week */
+	double margin = 0.5; 		/* 0.5" */
+	int number_of_days = 28;
+
+	double month_origin_x = margin;
+	double month_origin_y = 3.0;
+	double paper_width = 8.5;
+	double paper_height = 11;
+	double month_width = paper_width - (month_origin_x * 2);
+	double month_height = paper_height - month_origin_y - margin;
+	double day_box_width = month_width / columns;
+	double day_box_height = month_height / rows;
+
+	struct dimensions dim = {
+		paper_width, 	/* pw */
+		paper_height,	/* ph */
+		month_width,	/* mw */
+		month_height, 	/* mh */
+		day_box_width,	/* bw */
+		day_box_height,	/* bh */
+		rows,		/* r  */
+		columns,	/* c  */
+		margin,		/* m  */
+	};
+
+	/* Date Setup */
+		char *months[] = {
+		"January", "February", "March", "April", "May",
+		"June", "July", "August", "September", "October",
+		"November", "December"
+	};
+
+	//int days_in_month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+	
+	// const char *weekday_names[] = {
+	// 	"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
+	// };
+
+	// const char *weekdays_abbr[] = {
+	// 	"Su", "Mo", "Tue", "Wed", "Thurs", "Fri", "Sat"
+	// };
+
+	int year = 2025;
+	int month = 2;
+
+	struct tm day;
+	day.tm_mon = month - 1;
+	day.tm_mday = 1;
+	day.tm_year = year - 1900;
+
+	/* tm.hour, tm_min, & tm_sec are not used, but need to be zeroed. */
+	day.tm_hour = 0;
+	day.tm_min = 0;			
+	day.tm_sec = 0;
+
+	mktime(&day);
+
+	cairo_surface_t * surface = cairo_pdf_surface_create("0.pdf", dim.pw * 72, dim.ph * 72);
+	cairo_t *cr = cairo_create(surface);
+
+
+	cairo_scale(cr, 72, 72);
+	set_color(cr, "GRAY");
+	cairo_set_line_width (cr, 0.03);
+
+
+	draw_calendar(cr, month_origin_x, month_origin_y, dim);
+	draw_numbers(cr, month_origin_x, month_origin_y, dim, day.tm_wday, number_of_days);
+	draw_month_name(cr, months[1], dim);
+
+	/* Clean Up */
+	cairo_destroy(cr);
+	cairo_surface_destroy(surface);
+	return(0);
+}