/* * Copyright © 2005 Red Hat, Inc. * Copyright © 2007 Emmanuel Pacaud * Copyright © 2008 Benjamin Otte * * 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 * Emmanuel Pacaud */ #include #include "cairo-test.h" #include #define STEPS 16 #define START_OPERATOR CAIRO_OPERATOR_MULTIPLY #define STOP_OPERATOR CAIRO_OPERATOR_HSL_LUMINOSITY #define SIZE 5 #define COUNT 4 #define FULL_WIDTH ((STEPS + 1) * COUNT - 1) #define FULL_HEIGHT ((COUNT + STOP_OPERATOR - START_OPERATOR) / COUNT) * (STEPS + 1) static void set_solid_pattern (cairo_t *cr, int step, cairo_bool_t bg, cairo_bool_t alpha) { double c, a; a = ((double) step) / (STEPS - 1); if (alpha) { c = 1; } else { c = a; a = 1; } if (bg) /* draw a yellow background fading in using discrete steps */ cairo_set_source_rgba (cr, c, c, 0, a); else /* draw a teal foreground pattern fading in using discrete steps */ cairo_set_source_rgba (cr, 0, c, c, a); } /* expects a STEP*STEP pixel rectangle */ static void do_blend_solid (cairo_t *cr, cairo_operator_t op, cairo_bool_t alpha) { int x; cairo_save (cr); cairo_scale (cr, SIZE, SIZE); /* not using CAIRO_OPERATOR_SOURCE here, it triggers a librsvg bug */ cairo_set_operator (cr, CAIRO_OPERATOR_OVER); for (x = 0; x < STEPS; x++) { /* draw the background using discrete steps */ set_solid_pattern (cr, x, TRUE, alpha); cairo_rectangle (cr, x, 0, 1, STEPS); cairo_fill (cr); } cairo_set_operator (cr, op); for (x = 0; x < STEPS; x++) { /* draw an orthogonal foreground pattern using discrete steps */ set_solid_pattern (cr, x, FALSE, alpha); cairo_rectangle (cr, 0, x, STEPS, 1); cairo_fill (cr); } cairo_restore (cr); } static void create_patterns (cairo_t *cr, cairo_surface_t **bg, cairo_surface_t **fg, cairo_bool_t alpha) { cairo_t *bgcr, *fgcr; *bg = cairo_surface_create_similar (cairo_get_target (cr), CAIRO_CONTENT_COLOR_ALPHA, SIZE * STEPS, SIZE * STEPS); *fg = cairo_surface_create_similar (cairo_get_target (cr), CAIRO_CONTENT_COLOR_ALPHA, SIZE * STEPS, SIZE * STEPS); bgcr = cairo_create (*bg); fgcr = cairo_create (*fg); do_blend_solid (bgcr, CAIRO_OPERATOR_DEST, alpha); do_blend_solid (fgcr, CAIRO_OPERATOR_SOURCE, alpha); cairo_destroy (bgcr); cairo_destroy (fgcr); } /* expects a STEP*STEP pixel rectangle */ static void do_blend (cairo_t *cr, cairo_operator_t op, cairo_bool_t alpha) { cairo_surface_t *bg, *fg; create_patterns (cr, &bg, &fg, alpha); /* not using CAIRO_OPERATOR_SOURCE here, it triggers a librsvg bug */ cairo_set_operator (cr, CAIRO_OPERATOR_OVER); cairo_set_source_surface (cr, bg, 0, 0); cairo_paint (cr); cairo_set_operator (cr, op); cairo_set_source_surface (cr, fg, 0, 0); cairo_paint (cr); cairo_surface_destroy (fg); cairo_surface_destroy (bg); } static void do_blend_mask (cairo_t *cr, cairo_operator_t op, cairo_bool_t alpha) { cairo_surface_t *bg, *fg; create_patterns (cr, &bg, &fg, alpha); /* not using CAIRO_OPERATOR_SOURCE here, it triggers a librsvg bug */ cairo_set_operator (cr, CAIRO_OPERATOR_OVER); cairo_set_source_surface (cr, bg, 0, 0); cairo_paint (cr); cairo_set_operator (cr, op); cairo_set_source_surface (cr, fg, 0, 0); cairo_paint_with_alpha (cr, .5); cairo_surface_destroy (fg); cairo_surface_destroy (bg); } static cairo_test_status_t draw (cairo_t *cr, cairo_bool_t alpha, void (*blend)(cairo_t *, cairo_operator_t, cairo_bool_t)) { size_t i = 0; cairo_operator_t op; for (op = START_OPERATOR; op <= STOP_OPERATOR; op++, i++) { cairo_save (cr); cairo_translate (cr, SIZE * (STEPS + 1) * (i % COUNT), SIZE * (STEPS + 1) * (i / COUNT)); blend (cr, op, alpha); cairo_restore (cr); } return CAIRO_TEST_SUCCESS; } static cairo_test_status_t draw_extended_blend (cairo_t *cr, int width, int height) { return draw (cr, FALSE, do_blend); } static cairo_test_status_t draw_extended_blend_alpha (cairo_t *cr, int width, int height) { return draw (cr, TRUE, do_blend); } static cairo_test_status_t draw_extended_blend_solid (cairo_t *cr, int width, int height) { return draw (cr, FALSE, do_blend_solid); } static cairo_test_status_t draw_extended_blend_solid_alpha (cairo_t *cr, int width, int height) { return draw (cr, TRUE, do_blend_solid); } static cairo_test_status_t draw_extended_blend_mask (cairo_t *cr, int width, int height) { return draw (cr, FALSE, do_blend_mask); } static cairo_test_status_t draw_extended_blend_alpha_mask (cairo_t *cr, int width, int height) { return draw (cr, TRUE, do_blend_mask); } CAIRO_TEST (extended_blend, "Tests extended blend modes without alpha", "operator", /* keywords */ NULL, /* requirements */ FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE, NULL, draw_extended_blend) CAIRO_TEST (extended_blend_alpha, "Tests extended blend modes with alpha", "operator", /* keywords */ NULL, /* requirements */ FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE, NULL, draw_extended_blend_alpha) CAIRO_TEST (extended_blend_mask, "Tests extended blend modes with an alpha mask", "operator,mask", /* keywords */ NULL, /* requirements */ FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE, NULL, draw_extended_blend_mask) CAIRO_TEST (extended_blend_alpha_mask, "Tests extended blend modes with an alpha mask", "operator,mask", /* keywords */ NULL, /* requirements */ FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE, NULL, draw_extended_blend_alpha_mask) CAIRO_TEST (extended_blend_solid, "Tests extended blend modes on solid patterns without alpha", "operator", /* keywords */ NULL, /* requirements */ FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE, NULL, draw_extended_blend_solid) CAIRO_TEST (extended_blend_solid_alpha, "Tests extended blend modes on solid patterns with alpha", "operator", /* keywords */ NULL, /* requirements */ FULL_WIDTH * SIZE, FULL_HEIGHT * SIZE, NULL, draw_extended_blend_solid_alpha)