linear-gradient-extend.c [plain text]
#include "cairo-test.h"
#define NUM_EXTEND 4
#define HEIGHT 16
#define WIDTH 16
#define PAD 3
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *pattern;
unsigned int i, j;
cairo_extend_t extend[NUM_EXTEND] = {
CAIRO_EXTEND_NONE,
CAIRO_EXTEND_REPEAT,
CAIRO_EXTEND_REFLECT,
CAIRO_EXTEND_PAD
};
cairo_test_paint_checkered (cr);
pattern = cairo_pattern_create_linear (0, 2*PAD, 0, HEIGHT - 2*PAD);
cairo_pattern_add_color_stop_rgb (pattern, 0, 0, 0, 1);
cairo_pattern_add_color_stop_rgb (pattern, 1, 0, 0, 1);
cairo_translate (cr, PAD, PAD);
for (i = 0; i < 2; i++) {
cairo_save (cr);
for (j = 0; j < NUM_EXTEND; j++) {
cairo_pattern_set_extend (pattern, extend[j]);
cairo_reset_clip (cr);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
if (i & 1) {
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_mask (cr, pattern);
} else {
cairo_set_source (cr, pattern);
cairo_paint (cr);
}
cairo_translate (cr, WIDTH+PAD, 0);
}
cairo_restore (cr);
cairo_translate (cr, 0, HEIGHT+PAD);
}
cairo_pattern_destroy (pattern);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (linear_gradient_extend,
"Tests gradient to solid reduction of linear gradients",
"linear, pattern, extend",
NULL,
(WIDTH+PAD) * NUM_EXTEND + PAD, 2*(HEIGHT + PAD) + PAD,
NULL, draw)