static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *pattern;
cairo_test_paint_checkered (cr);
cairo_translate (cr, PAD, PAD);
pattern = cairo_pattern_create_mesh ();
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 0, 0);
cairo_mesh_pattern_curve_to (pattern, 30, -30, 60, 30, 100, 0);
cairo_mesh_pattern_curve_to (pattern, 60, 30, 130, 60, 100, 100);
cairo_mesh_pattern_curve_to (pattern, 60, 70, 30, 130, 0, 100);
cairo_mesh_pattern_curve_to (pattern, 30, 70, -30, 30, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_end_patch (pattern);
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 50, 50);
cairo_mesh_pattern_curve_to (pattern, 80, 20, 110, 80, 150, 50);
cairo_mesh_pattern_curve_to (pattern, 110, 80, 180, 110, 150, 150);
cairo_mesh_pattern_curve_to (pattern, 110, 120, 80, 180, 50, 150);
cairo_mesh_pattern_curve_to (pattern, 80, 120, 20, 80, 50, 50);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 0, 1, 0, 0, 0.3);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 2, 0, 0, 1, 0.3);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_end_patch (pattern);
cairo_scale (cr, .5, .5);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_translate (cr, PAT_WIDTH, PAT_HEIGHT);
cairo_translate (cr, PAT_WIDTH/2, PAT_HEIGHT/2);
cairo_rotate (cr, M_PI/4);
cairo_translate (cr, -PAT_WIDTH, -PAT_HEIGHT);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
return CAIRO_TEST_SUCCESS;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *pattern;
double offset;
cairo_test_paint_checkered (cr);
pattern = cairo_pattern_create_mesh ();
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 0, 0);
cairo_mesh_pattern_line_to (pattern, 1, 0);
cairo_mesh_pattern_line_to (pattern, 1, 1);
cairo_mesh_pattern_line_to (pattern, 0, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 0, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 1, 1, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 1);
cairo_mesh_pattern_end_patch (pattern);
cairo_mesh_pattern_begin_patch (pattern);
/* A small 1x1 red patch, that should be rendered as a 2x2 red
* square in the center of the image */
offset = 0.5 / SIZE;
cairo_mesh_pattern_move_to (pattern, 0.5 + offset, 0.5 + offset);
cairo_mesh_pattern_line_to (pattern, 0.5 + offset, 0.5 - offset);
cairo_mesh_pattern_line_to (pattern, 0.5 - offset, 0.5 - offset);
cairo_mesh_pattern_line_to (pattern, 0.5 - offset, 0.5 + offset);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 0, 0);
cairo_mesh_pattern_end_patch (pattern);
cairo_scale (cr, SIZE, SIZE);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
return CAIRO_TEST_SUCCESS;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *pattern;
cairo_test_paint_checkered (cr);
cairo_translate (cr, PAD, PAD);
pattern = cairo_pattern_create_mesh ();
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 0, 0);
cairo_mesh_pattern_curve_to (pattern, 30, -30, 60, 30, 100, 0);
cairo_mesh_pattern_curve_to (pattern, 130, 140, 60, -40, 100, 100);
cairo_mesh_pattern_curve_to (pattern, 60, 70, 30, 130, 0, 100);
cairo_mesh_pattern_curve_to (pattern, -30, -40, 30, 140, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_end_patch (pattern);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
return CAIRO_TEST_SUCCESS;
}
static void
patch_line (cairo_pattern_t *pattern,
double x0, double y0,
double x1, double y1,
double radius,
double r, double g, double b, double a)
{
double dx = y1 - y0;
double dy = x0 - x1;
double len = radius / hypot (dx, dy);
dx *= len;
dy *= len;
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, x0, y0);
cairo_mesh_pattern_line_to (pattern, x0 + dx, y0 + dy);
cairo_mesh_pattern_line_to (pattern, x1 + dx, y1 + dy);
cairo_mesh_pattern_line_to (pattern, x1, y1);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 0, r, g, b, a);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 1, r, g, b, 0);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 2, r, g, b, 0);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 3, r, g, b, a);
cairo_mesh_pattern_end_patch (pattern);
}
static VALUE
cr_mesh_pattern_move_to (VALUE self, VALUE x, VALUE y)
{
cairo_pattern_t *pattern;
pattern = _SELF (self);
cairo_mesh_pattern_move_to (pattern, NUM2DBL (x), NUM2DBL (y));
cr_pattern_check_status (pattern);
return self;
}
static cairo_pattern_t *
mesh (void)
{
cairo_pattern_t *pattern;
pattern = cairo_pattern_create_mesh ();
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 0, 0);
cairo_mesh_pattern_curve_to (pattern, 30, -30, 60, 30, 100, 0);
cairo_mesh_pattern_curve_to (pattern, 60, 30, 130, 60, 100, 100);
cairo_mesh_pattern_curve_to (pattern, 60, 70, 30, 130, 0, 100);
cairo_mesh_pattern_curve_to (pattern, 30, 70, -30, 30, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_end_patch (pattern);
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 50, 50);
cairo_mesh_pattern_curve_to (pattern, 80, 20, 110, 80, 150, 50);
cairo_mesh_pattern_curve_to (pattern, 110, 80, 180, 110, 150, 150);
cairo_mesh_pattern_curve_to (pattern, 110, 120, 80, 180, 50, 150);
cairo_mesh_pattern_curve_to (pattern, 80, 120, 20, 80, 50, 50);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 0, 1, 0, 0, 0.3);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 2, 0, 0, 1, 0.3);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_end_patch (pattern);
return pattern;
}
static void
patch_arc (cairo_pattern_t *pattern,
double x, double y,
double start, double end,
double radius,
double r, double g, double b, double a)
{
double r_sin_A, r_cos_A;
double r_sin_B, r_cos_B;
double h;
r_sin_A = radius * sin (start);
r_cos_A = radius * cos (start);
r_sin_B = radius * sin (end);
r_cos_B = radius * cos (end);
h = 4.0/3.0 * tan ((end - start) / 4.0);
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, x, y);
cairo_mesh_pattern_line_to (pattern,
x + r_cos_A,
y + r_sin_A);
cairo_mesh_pattern_curve_to (pattern,
x + r_cos_A - h * r_sin_A,
y + r_sin_A + h * r_cos_A,
x + r_cos_B + h * r_sin_B,
y + r_sin_B - h * r_cos_B,
x + r_cos_B,
y + r_sin_B);
cairo_mesh_pattern_line_to (pattern, x, y);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 0, r, g, b, a);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 1, r, g, b, 0);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 2, r, g, b, 0);
cairo_mesh_pattern_set_corner_color_rgba (pattern, 3, r, g, b, a);
cairo_mesh_pattern_end_patch (pattern);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *pattern;
unsigned int i, j;
unsigned int num_patches;
double x, y;
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_translate (cr, PAD, PAD);
pattern = cairo_pattern_create_mesh ();
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, 0, 0);
cairo_mesh_pattern_line_to (pattern, SIZE, 0);
cairo_mesh_pattern_line_to (pattern, SIZE, SIZE);
cairo_mesh_pattern_line_to (pattern, 0, SIZE);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_set_control_point (pattern, 0, SIZE * .7, SIZE * .7);
cairo_mesh_pattern_set_control_point (pattern, 1, SIZE * .9, SIZE * .7);
cairo_mesh_pattern_set_control_point (pattern, 2, SIZE * .9, SIZE * .9);
cairo_mesh_pattern_set_control_point (pattern, 3, SIZE * .7, SIZE * .9);
cairo_mesh_pattern_end_patch (pattern);
cairo_mesh_pattern_begin_patch (pattern);
cairo_mesh_pattern_move_to (pattern, SIZE + PAD, 0);
cairo_mesh_pattern_line_to (pattern, 2*SIZE + PAD, 0);
cairo_mesh_pattern_line_to (pattern, 2*SIZE + PAD, SIZE);
cairo_mesh_pattern_line_to (pattern, SIZE + PAD, SIZE);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 0, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, 0, 1, 0);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, 0, 0, 1);
cairo_mesh_pattern_set_corner_color_rgb (pattern, 3, 1, 1, 0);
cairo_mesh_pattern_end_patch (pattern);
cairo_set_source (cr, pattern);
cairo_paint (cr);
/* mark the location of the control points */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_mesh_pattern_get_patch_count (pattern, &num_patches);
for (i = 0; i < num_patches; i++) {
for (j = 0; j < 4; j++) {
cairo_mesh_pattern_get_control_point (pattern, i, j, &x, &y);
cairo_rectangle (cr, x - 5, y - 5, 10, 10);
cairo_fill (cr);
}
}
cairo_pattern_destroy (pattern);
return CAIRO_TEST_SUCCESS;
}