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Diffstat (limited to 'test/trap-clip.c')
| -rw-r--r-- | test/trap-clip.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/test/trap-clip.c b/test/trap-clip.c new file mode 100644 index 000000000..f1a24ca8d --- /dev/null +++ b/test/trap-clip.c @@ -0,0 +1,213 @@ +/* + * 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. + * + * Author: Kristian Høgsberg <krh@redhat.com> + */ + +#include "cairo-test.h" +#include <math.h> +#include <stdio.h> + +#define WIDTH 16 +#define HEIGHT 16 +#define PAD 2 + +static const char *png_filename = "romedalen.png"; +static cairo_surface_t *image; + +static void +set_solid_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y) +{ + cairo_set_source_rgb (cr, 0, 0, 0.6); +} + +static void +set_translucent_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y) +{ + cairo_set_source_rgba (cr, 0, 0, 0.6, 0.5); +} + +static void +set_gradient_pattern (const cairo_test_context_t *ctx, 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 (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y) +{ + cairo_pattern_t *pattern; + + if (image == NULL || cairo_surface_status (image)) { + cairo_surface_destroy (image); + image = cairo_test_create_surface_from_png (ctx, png_filename); + } + + pattern = cairo_pattern_create_for_surface (image); + cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT); + cairo_set_source (cr, pattern); + cairo_pattern_destroy (pattern); +} + +static void +draw_rect (cairo_t *cr, int x, int y) +{ + cairo_new_path (cr); + cairo_rectangle (cr, x, y, WIDTH, HEIGHT); + cairo_fill (cr); +} + +static void +draw_rects (cairo_t *cr, int x, int y) +{ + int width = WIDTH / 3; + int height = HEIGHT / 2; + + cairo_new_path (cr); + cairo_rectangle (cr, x, y, width, height); + cairo_rectangle (cr, x + width, y + height, width, height); + cairo_rectangle (cr, x + 2 * width, y, width, height); + cairo_fill (cr); +} + +static void +draw_polygon (cairo_t *cr, int x, int y) +{ + cairo_new_path (cr); + cairo_move_to (cr, x, y); + cairo_line_to (cr, x, y + HEIGHT); + cairo_line_to (cr, x + WIDTH / 2, y + 3 * HEIGHT / 4); + cairo_line_to (cr, x + WIDTH, y + HEIGHT); + cairo_line_to (cr, x + WIDTH, y); + cairo_line_to (cr, x + WIDTH / 2, y + HEIGHT / 4); + cairo_close_path (cr); + cairo_fill (cr); +} + +static void +clip_none (cairo_t *cr, int x, int y) +{ +} + +static void +clip_rect (cairo_t *cr, int x, int y) +{ + cairo_new_path (cr); + cairo_rectangle (cr, x + (int)WIDTH / 6, y + (int)HEIGHT / 6, + 4 * ((int)WIDTH / 6), 4 * ((int)WIDTH / 6)); + cairo_clip (cr); + cairo_new_path (cr); +} + +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); + cairo_new_path (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 / 3, 0, 2 * M_PI); + cairo_clip (cr); + cairo_new_path (cr); +} + +static void (* const pattern_funcs[])(const cairo_test_context_t *ctx, cairo_t *cr, int x, int y) = { + set_solid_pattern, + set_translucent_pattern, + set_gradient_pattern, + set_image_pattern, +}; + +static void (* const draw_funcs[])(cairo_t *cr, int x, int y) = { + draw_rect, + draw_rects, + draw_polygon, +}; + +static void (* const clip_funcs[])(cairo_t *cr, int x, int y) = { + clip_none, + clip_rect, + clip_rects, + clip_circle, +}; + +#define IMAGE_WIDTH (ARRAY_LENGTH (pattern_funcs) * (WIDTH + PAD) + PAD) +#define IMAGE_HEIGHT (ARRAY_LENGTH (draw_funcs) * ARRAY_LENGTH (clip_funcs) * (HEIGHT + PAD) + PAD) + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + const cairo_test_context_t *ctx = cairo_test_get_context (cr); + size_t i, j, k, x, y; + + for (k = 0; k < ARRAY_LENGTH (clip_funcs); k++) { + for (j = 0; j < ARRAY_LENGTH (draw_funcs); j++) { + for (i = 0; i < ARRAY_LENGTH (pattern_funcs); i++) { + x = i * (WIDTH + PAD) + PAD; + y = (ARRAY_LENGTH (draw_funcs) * k + j) * (HEIGHT + PAD) + PAD; + + cairo_save (cr); + + cairo_move_to (cr, x, y); + clip_funcs[k] (cr, x, y); + pattern_funcs[i] (ctx, cr, x, y); + draw_funcs[j] (cr, x, y); + if (cairo_status (cr)) + cairo_test_log (ctx, "%d %d HERE!\n", (int)i, (int)j); + + cairo_restore (cr); + } + } + } + + if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) + cairo_test_log (ctx, "%d %d .HERE!\n", (int)i, (int)j); + + cairo_surface_destroy (image); + image = NULL; + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (trap_clip, + "Trapezoid clipping", + "clip, trap", /* keywords */ + NULL, /* requirements */ + IMAGE_WIDTH, IMAGE_HEIGHT, + NULL, draw) |