caps-joins-alpha.c [plain text]
#include "cairo-test.h"
#define LINE_WIDTH 10.
#define SIZE (5 * LINE_WIDTH)
#define PAD (2 * LINE_WIDTH)
static void
make_path (cairo_t *cr)
{
cairo_move_to (cr, 0., 0.);
cairo_rel_line_to (cr, 0., SIZE);
cairo_rel_line_to (cr, SIZE, 0.);
cairo_close_path (cr);
cairo_move_to (cr, 2 * LINE_WIDTH, 0.);
cairo_rel_line_to (cr, 3 * LINE_WIDTH, 0.);
cairo_rel_line_to (cr, 0., 3 * LINE_WIDTH);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_test_paint_checkered (cr);
cairo_set_line_width (cr, LINE_WIDTH);
cairo_set_source_rgba (cr, 1.0, 0.0, 0.0, 0.5);
cairo_translate (cr, PAD, PAD);
make_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 0.0, 1.0, 0.0, 0.5);
cairo_translate (cr, SIZE + PAD, 0.);
make_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 0.0, 0.0, 1.0, 0.5);
cairo_translate (cr, SIZE + PAD, 0.);
make_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
cairo_stroke (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (caps_joins_alpha,
"Test caps and joins with some source alpha",
"stroke",
NULL,
3 * (PAD + SIZE) + PAD,
PAD + SIZE + PAD,
NULL, draw)