clip-draw-unbounded.c [plain text]
#include "cairo-test.h"
#define WIDTH 60
#define HEIGHT 60
static void
stroke (cairo_t *cr)
{
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_IN);
cairo_set_source_rgb (cr, 0, 0.7, 0);
cairo_arc (cr, 10, 10, 7.5, 0, 2 * M_PI);
cairo_move_to (cr, 0, 20);
cairo_line_to (cr, 20, 0);
cairo_stroke (cr);
}
static void
fill (cairo_t *cr)
{
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_IN);
cairo_set_source_rgb (cr, 0, 0.7, 0);
cairo_new_sub_path (cr);
cairo_arc (cr, 10, 10, 8.5, 0, 2 * M_PI);
cairo_new_sub_path (cr);
cairo_arc_negative (cr, 10, 10, 6.5, 2 * M_PI, 0);
cairo_move_to (cr, -1, 19);
cairo_line_to (cr, 1, 21);
cairo_line_to (cr, 21, 1);
cairo_line_to (cr, 19, -1);
cairo_line_to (cr, -1, 19);
cairo_fill (cr);
}
static void
clip_simple (cairo_t *cr)
{
cairo_rectangle (cr, 0, 0, 20, 20);
cairo_clip (cr);
}
static void
clip_unaligned (cairo_t *cr)
{
cairo_rectangle (cr, 0.5, 0.5, 20, 20);
cairo_clip (cr);
}
static void
clip_aligned (cairo_t *cr)
{
cairo_fill_rule_t orig_rule;
orig_rule = cairo_get_fill_rule (cr);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_rectangle (cr, 0, 0, 20, 20);
cairo_rectangle (cr, 3, 3, 10, 10);
cairo_rectangle (cr, 7, 7, 10, 10);
cairo_clip (cr);
cairo_set_fill_rule (cr, orig_rule);
}
static void
clip_mask (cairo_t *cr)
{
cairo_arc (cr, 10, 10, 10, 0, 2 * M_PI);
cairo_new_sub_path (cr);
cairo_arc_negative (cr, 10, 10, 5, 2 * M_PI, 0);
cairo_new_sub_path (cr);
cairo_arc (cr, 10, 10, 2, 0, 2 * M_PI);
cairo_clip (cr);
}
static void (* const clip_funcs[])(cairo_t *cr) = {
clip_simple,
clip_unaligned,
clip_aligned,
clip_mask
};
static double translations[][2] = {
{ 10, 10 },
{ WIDTH, 0 },
{ -WIDTH, HEIGHT },
{ WIDTH, 0 }
};
static cairo_test_status_t
draw (cairo_t *cr, void (*shapes)(cairo_t *))
{
int i;
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
for (i = 0; i < sizeof (clip_funcs) / sizeof (clip_funcs[0]); i++) {
cairo_translate (cr, translations[i][0], translations[i][1]);
cairo_save (cr);
cairo_scale (cr, 2, 2);
clip_funcs[i] (cr);
shapes (cr);
cairo_restore (cr);
}
return CAIRO_TEST_SUCCESS;
}
static cairo_test_status_t
draw_stroke (cairo_t *cr, int width, int height)
{
return draw (cr, stroke);
}
static cairo_test_status_t
draw_fill_nz (cairo_t *cr, int width, int height)
{
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
return draw (cr, fill);
}
static cairo_test_status_t
draw_fill_eo (cairo_t *cr, int width, int height)
{
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
return draw (cr, fill);
}
CAIRO_TEST (clip_stroke_unbounded,
"Tests unbounded stroke through complex clips.",
"clip, stroke, unbounded",
NULL,
2 * WIDTH, 2 * HEIGHT,
NULL, draw_stroke)
CAIRO_TEST (clip_fill_nz_unbounded,
"Tests unbounded fill through complex clips (with winding fill rule).",
"clip, fill, unbounded",
NULL,
2 * WIDTH, 2 * HEIGHT,
NULL, draw_fill_nz)
CAIRO_TEST (clip_fill_eo_unbounded,
"Tests unbounded fill through complex clips (with even-odd fill rule).",
"clip, fill, unbounded",
NULL,
2 * WIDTH, 2 * HEIGHT,
NULL, draw_fill_eo)