/* * Copyright © 2005 Red Hat, Inc. * * Permission to use, copy, modify, distribute, and sell this software * and its documentation for any purpose is hereby granted without * fee, provided that the above copyright notice appear in all copies * and that both that copyright notice and this permission notice * appear in supporting documentation, and that the name of * Red Hat, Inc. not be used in advertising or publicity pertaining to * distribution of the software without specific, written prior * permission. Red Hat, Inc. makes no representations about the * suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL, * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Authors: Owen Taylor * Kristian Høgsberg */ #include #include "cairo-test.h" #include #define WIDTH 16 #define HEIGHT 16 #define PAD 2 const char png_filename[] = "romedalen.png"; static void set_solid_pattern (cairo_t *cr, int x, int y) { cairo_set_source_rgb (cr, 0, 0, 0.6); } static void set_translucent_pattern (cairo_t *cr, int x, int y) { cairo_set_source_rgba (cr, 0, 0, 0.6, 0.5); } static void set_gradient_pattern (cairo_t *cr, int x, int y) { cairo_pattern_t *pattern; pattern = cairo_pattern_create_linear (x, y, x + WIDTH, y + HEIGHT); cairo_pattern_add_color_stop_rgba (pattern, 0, 1, 1, 1, 1); cairo_pattern_add_color_stop_rgba (pattern, 1, 0, 0, 0.4, 1); cairo_set_source (cr, pattern); cairo_pattern_destroy (pattern); } static void set_image_pattern (cairo_t *cr, int x, int y) { cairo_pattern_t *pattern; pattern = cairo_test_create_pattern_from_png (png_filename); cairo_set_source (cr, pattern); cairo_pattern_destroy (pattern); } static void mask_polygon (cairo_t *cr, int x, int y) { cairo_surface_t *mask_surface; cairo_t *cr2; mask_surface = cairo_surface_create_similar (cairo_get_target (cr), CAIRO_CONTENT_ALPHA, WIDTH, HEIGHT); cr2 = cairo_create (mask_surface); cairo_save (cr2); cairo_set_operator (cr2, CAIRO_OPERATOR_CLEAR); cairo_paint (cr2); cairo_restore (cr2); cairo_set_source_rgb (cr2, 1, 1, 1); /* white */ cairo_new_path (cr2); cairo_move_to (cr2, 0, 0); cairo_line_to (cr2, 0, HEIGHT); cairo_line_to (cr2, WIDTH / 2, 3 * HEIGHT / 4); cairo_line_to (cr2, WIDTH, HEIGHT); cairo_line_to (cr2, WIDTH, 0); cairo_line_to (cr2, WIDTH / 2, HEIGHT / 4); cairo_close_path (cr2); cairo_fill (cr2); cairo_destroy (cr2); cairo_mask_surface (cr, mask_surface, x, y); cairo_surface_destroy (mask_surface); } static void mask_alpha (cairo_t *cr, int x, int y) { cairo_paint_with_alpha (cr, 0.75); } static void mask_gradient (cairo_t *cr, int x, int y) { cairo_pattern_t *pattern; pattern = cairo_pattern_create_linear (x, y, x + WIDTH, y + HEIGHT); cairo_pattern_add_color_stop_rgba (pattern, 0, 1, 1, 1, 1); cairo_pattern_add_color_stop_rgba (pattern, 1, 1, 1, 1, 0); cairo_mask (cr, pattern); cairo_pattern_destroy (pattern); } static void clip_none (cairo_t *cr, int x, int y) { } static void clip_rects (cairo_t *cr, int x, int y) { int height = HEIGHT / 3; cairo_new_path (cr); cairo_rectangle (cr, x, y, WIDTH, height); cairo_rectangle (cr, x, y + 2 * height, WIDTH, height); cairo_clip (cr); } static void clip_circle (cairo_t *cr, int x, int y) { cairo_new_path (cr); cairo_arc (cr, x + WIDTH / 2, y + HEIGHT / 2, WIDTH / 2, 0, 2 * M_PI); cairo_clip (cr); cairo_new_path (cr); } static void (*pattern_funcs[])(cairo_t *cr, int x, int y) = { set_solid_pattern, set_translucent_pattern, set_gradient_pattern, set_image_pattern, }; static void (*mask_funcs[])(cairo_t *cr, int x, int y) = { mask_alpha, mask_gradient, mask_polygon, }; static void (*clip_funcs[])(cairo_t *cr, int x, int y) = { clip_none, clip_rects, clip_circle, }; #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) #define IMAGE_WIDTH (ARRAY_SIZE (pattern_funcs) * (WIDTH + PAD) + PAD) #define IMAGE_HEIGHT (ARRAY_SIZE (mask_funcs) * ARRAY_SIZE (clip_funcs) * (HEIGHT + PAD) + PAD) static cairo_test_draw_function_t draw; cairo_test_t test = { "mask", "Tests of cairo_mask", IMAGE_WIDTH, IMAGE_HEIGHT, draw }; static cairo_test_status_t draw (cairo_t *cr, int width, int height) { cairo_surface_t *tmp_surface; cairo_pattern_t *tmp_pattern; size_t i, j, k; cairo_t *cr2; /* Some of our drawing is unbounded, so we draw each test to * a temporary surface and copy over. */ tmp_surface = cairo_surface_create_similar (cairo_get_target (cr), CAIRO_CONTENT_COLOR_ALPHA, IMAGE_WIDTH, IMAGE_HEIGHT); cr2 = cairo_create (tmp_surface); tmp_pattern = cairo_pattern_create_for_surface (tmp_surface); cairo_set_source (cr, tmp_pattern); cairo_pattern_destroy (tmp_pattern); cairo_surface_destroy (tmp_surface); for (k = 0; k < ARRAY_SIZE (clip_funcs); k++) { for (j = 0; j < ARRAY_SIZE (mask_funcs); j++) { for (i = 0; i < ARRAY_SIZE (pattern_funcs); i++) { int x = i * (WIDTH + PAD) + PAD; int y = (ARRAY_SIZE (mask_funcs) * k + j) * (HEIGHT + PAD) + PAD; /* Clear intermediate surface we are going to be drawing onto */ cairo_save (cr2); cairo_set_operator (cr2, CAIRO_OPERATOR_CLEAR); cairo_paint (cr2); cairo_restore (cr2); /* draw */ cairo_save (cr2); clip_funcs[k] (cr2, x, y); pattern_funcs[i] (cr2, x, y); mask_funcs[j] (cr2, x, y); cairo_restore (cr2); /* Copy back to the main pixmap */ cairo_rectangle (cr, x, y, WIDTH, HEIGHT); cairo_fill (cr); } } } cairo_destroy (cr2); return CAIRO_TEST_SUCCESS; } int main (void) { return cairo_test (&test); }