[fio.git] / cairo_text_helpers.c

#include "cairo_text_helpers.h"

#include <cairo.h>
#include <gtk/gtk.h>
#include <math.h>

static void draw_aligned_text(cairo_t *cr, const char *font, double x, double y,
			       double fontsize, const char *text, int alignment)
{
#define CENTERED 0
#define LEFT_JUSTIFIED 1
#define RIGHT_JUSTIFIED 2

	double factor, direction;
	cairo_text_extents_t extents;

	switch (alignment) {
		case CENTERED:
			direction = -1.0;
			factor = 0.5;
			break;
		case RIGHT_JUSTIFIED:
			direction = -1.0;
			factor = 1.0;
			break;
		case LEFT_JUSTIFIED:
		default:
			direction = 1.0;
			factor = 0.0;
			break;
	}
	cairo_select_font_face(cr, font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);

	cairo_set_font_size(cr, fontsize);
	cairo_text_extents(cr, text, &extents);
	x = x + direction * (factor * extents.width  + extents.x_bearing);
	y = y - (extents.height / 2 + extents.y_bearing);

	cairo_move_to(cr, x, y);
	cairo_show_text(cr, text);
}

void draw_centered_text(cairo_t *cr, const char *font, double x, double y,
			       double fontsize, const char *text)
{
	draw_aligned_text(cr, font, x, y, fontsize, text, CENTERED);
}

void draw_right_justified_text(cairo_t *cr, const char *font,
				double x, double y,
				double fontsize, const char *text)
{
	draw_aligned_text(cr, font, x, y, fontsize, text, RIGHT_JUSTIFIED);
}

void draw_left_justified_text(cairo_t *cr, const char *font,
				double x, double y,
				double fontsize, const char *text)
{
	draw_aligned_text(cr, font, x, y, fontsize, text, LEFT_JUSTIFIED);
}

void draw_vertical_centered_text(cairo_t *cr, const char *font, double x,
					double y, double fontsize,
					const char *text)
{
	double sx, sy;
	cairo_text_extents_t extents;

	cairo_select_font_face(cr, font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);

	cairo_set_font_size(cr, fontsize);
	cairo_text_extents(cr, text, &extents);
	sx = x;
	sy = y;
	y = y + (extents.width / 2.0 + extents.x_bearing);
	x = x - (extents.height / 2.0 + extents.y_bearing);

	cairo_move_to(cr, x, y);
	cairo_save(cr);
	cairo_translate(cr, -sx, -sy);
	cairo_rotate(cr, -90.0 * M_PI / 180.0);
	cairo_translate(cr, sx, sy);
	cairo_show_text(cr, text);
	cairo_restore(cr);
}
Commit	Line	Data
13229219 DP	1	#include "cairo_text_helpers.h"
13229219 DP	2
ee2f55b2 SC	3	#include <cairo.h>
	4	#include <gtk/gtk.h>
	5	#include <math.h>
	6
	7	static void draw_aligned_text(cairo_t cr, const char font, double x, double y,
	8	double fontsize, const char *text, int alignment)
	9	{
	10	#define CENTERED 0
	11	#define LEFT_JUSTIFIED 1
	12	#define RIGHT_JUSTIFIED 2
	13
	14	double factor, direction;
	15	cairo_text_extents_t extents;
	16
3c3ed070	17	switch (alignment) {
ee2f55b2 SC	18	case CENTERED:
	19	direction = -1.0;
	20	factor = 0.5;
	21	break;
	22	case RIGHT_JUSTIFIED:
	23	direction = -1.0;
	24	factor = 1.0;
	25	break;
	26	case LEFT_JUSTIFIED:
	27	default:
	28	direction = 1.0;
c3a5b6dc	29	factor = 0.0;
ee2f55b2 SC	30	break;
	31	}
	32	cairo_select_font_face(cr, font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
	33
	34	cairo_set_font_size(cr, fontsize);
	35	cairo_text_extents(cr, text, &extents);
	36	x = x + direction * (factor * extents.width + extents.x_bearing);
	37	y = y - (extents.height / 2 + extents.y_bearing);
	38
	39	cairo_move_to(cr, x, y);
	40	cairo_show_text(cr, text);
	41	}
	42
	43	void draw_centered_text(cairo_t cr, const char font, double x, double y,
	44	double fontsize, const char *text)
	45	{
	46	draw_aligned_text(cr, font, x, y, fontsize, text, CENTERED);
	47	}
	48
	49	void draw_right_justified_text(cairo_t cr, const char font,
	50	double x, double y,
	51	double fontsize, const char *text)
	52	{
	53	draw_aligned_text(cr, font, x, y, fontsize, text, RIGHT_JUSTIFIED);
	54	}
	55
	56	void draw_left_justified_text(cairo_t cr, const char font,
	57	double x, double y,
	58	double fontsize, const char *text)
	59	{
	60	draw_aligned_text(cr, font, x, y, fontsize, text, LEFT_JUSTIFIED);
	61	}
	62
3c3ed070	63	void draw_vertical_centered_text(cairo_t cr, const char font, double x,
ee2f55b2 SC	64	double y, double fontsize,
	65	const char *text)
	66	{
	67	double sx, sy;
	68	cairo_text_extents_t extents;
	69
	70	cairo_select_font_face(cr, font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
	71
	72	cairo_set_font_size(cr, fontsize);
	73	cairo_text_extents(cr, text, &extents);
	74	sx = x;
	75	sy = y;
	76	y = y + (extents.width / 2.0 + extents.x_bearing);
	77	x = x - (extents.height / 2.0 + extents.y_bearing);
	78
	79	cairo_move_to(cr, x, y);
	80	cairo_save(cr);
	81	cairo_translate(cr, -sx, -sy);
	82	cairo_rotate(cr, -90.0 * M_PI / 180.0);
	83	cairo_translate(cr, sx, sy);
	84	cairo_show_text(cr, text);
	85	cairo_restore(cr);
	86	}
	87