push-group-color.c [plain text]
#include "cairo-test.h"
#define UNIT_SIZE 100
#define PAD 5
#define INNER_PAD 10
#define WIDTH (UNIT_SIZE + PAD) + PAD
#define HEIGHT (UNIT_SIZE + PAD) + PAD
static cairo_pattern_t *
argb32_source (void)
{
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 16, 16);
cr = cairo_create (surface);
cairo_surface_destroy (surface);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_rectangle (cr, 8, 0, 8, 8);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_rectangle (cr, 0, 8, 8, 8);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_rectangle (cr, 8, 8, 8, 8);
cairo_fill (cr);
pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));
cairo_destroy (cr);
return pattern;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *gradient, *image;
cairo_set_source_rgb (cr, 1,1,1);
cairo_paint (cr);
cairo_translate (cr, PAD, PAD);
cairo_rectangle (cr, 0, 0,
UNIT_SIZE, UNIT_SIZE);
cairo_clip (cr);
cairo_rectangle (cr, 0, 0,
UNIT_SIZE, UNIT_SIZE);
cairo_set_source_rgba (cr, 0, 0, 0, 1);
cairo_set_line_width (cr, 2);
cairo_stroke (cr);
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR);
cairo_save (cr);
cairo_translate (cr, INNER_PAD, INNER_PAD);
cairo_new_path (cr);
cairo_rectangle (cr, 0, 0,
UNIT_SIZE - (INNER_PAD*2), UNIT_SIZE - (INNER_PAD*2));
gradient = cairo_pattern_create_linear (UNIT_SIZE - (INNER_PAD*2), 0,
UNIT_SIZE - (INNER_PAD*2), UNIT_SIZE - (INNER_PAD*2));
cairo_pattern_add_color_stop_rgba (gradient, 0.0, 0.3, 0.3, 0.3, 1.0);
cairo_pattern_add_color_stop_rgba (gradient, 1.0, 1.0, 1.0, 1.0, 1.0);
cairo_set_source (cr, gradient);
cairo_pattern_destroy (gradient);
cairo_fill (cr);
cairo_restore (cr);
cairo_move_to (cr, UNIT_SIZE / 2, 0);
cairo_line_to (cr, UNIT_SIZE , UNIT_SIZE / 2);
cairo_line_to (cr, UNIT_SIZE / 2, UNIT_SIZE);
cairo_line_to (cr, 0 , UNIT_SIZE / 2);
cairo_close_path (cr);
cairo_set_source_rgba (cr, 0, 0, 1, 1);
cairo_fill (cr);
cairo_arc (cr,
UNIT_SIZE / 2, UNIT_SIZE / 2,
UNIT_SIZE / 3.5,
0, M_PI * 2);
cairo_set_source_rgba (cr, 1, 0, 0, 1);
cairo_fill (cr);
cairo_translate (cr, UNIT_SIZE/2 - 8, UNIT_SIZE/2 - 8);
image = argb32_source ();
cairo_set_source (cr, image);
cairo_pattern_destroy (image);
cairo_paint (cr);
cairo_pop_group_to_source (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (push_group_color,
"Verify that cairo_push_group_with_content works.",
"group",
NULL,
WIDTH, HEIGHT,
NULL, draw)