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/*
* Copyright © 2016 Adrian Johnson
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Adrian Johnson <ajohnson@redneon.com>
*/
#include "cairo-test.h"
#include <stdio.h>
#include <math.h>
#define PAT_SIZE 64
#define PAD (PAT_SIZE/8)
#define WIDTH (PAT_SIZE*4 + PAD*5)
#define HEIGHT (PAT_SIZE + PAD*2)
/* Test case based on bug 89232 - painting a recording surface to a pdf/ps surface
* omits objects on the recording surface with negative coordinates even though
* the pattern matrix has transformed the objects to within the page extents.
* The bug is a result of pdf/ps assuming the surface extents are always
* (0,0) to (page_width, page_height).
*
* Each test has four cases of painting a recording pattern where:
* 1) recording surface origin is transformed to the center of the pattern
* 2) same as 1) but also scaled up 10x
* 3) same as 1) but also scaled down 10x
* 4) same as 1) but also rotated 45 deg
*/
static void
transform_extents(cairo_rectangle_t *extents, cairo_matrix_t *mat)
{
double x1, y1, x2, y2, x, y;
#define UPDATE_BBOX \
x1 = x < x1 ? x : x1; \
y1 = y < y1 ? y : y1; \
x2 = x > x2 ? x : x2; \
y2 = y > y2 ? y : y2;
x = extents->x;
y = extents->y;
cairo_matrix_transform_point (mat, &x, &y);
x1 = x2 = x;
y1 = y2 = y;
x = extents->x + extents->width;
y = extents->y;
cairo_matrix_transform_point (mat, &x, &y);
UPDATE_BBOX;
x = extents->x;
y = extents->y + extents->height;
cairo_matrix_transform_point (mat, &x, &y);
UPDATE_BBOX;
x = extents->x + extents->width;
y = extents->y + extents->height;
cairo_matrix_transform_point (mat, &x, &y);
UPDATE_BBOX;
extents->x = x1;
extents->y = y1;
extents->width = x2 - extents->x;
extents->height = y2 - extents->y;
#undef UPDATE_BBOX
}
static cairo_pattern_t *
create_pattern (cairo_matrix_t *mat, cairo_bool_t bounded)
{
cairo_surface_t *surf;
cairo_pattern_t *pat;
cairo_t *cr;
int border;
int square;
if (bounded) {
cairo_rectangle_t extents = { 0, 0, PAT_SIZE, PAT_SIZE };
transform_extents (&extents, mat);
surf = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, &extents);
} else {
surf = cairo_recording_surface_create (CAIRO_CONTENT_COLOR_ALPHA, NULL);
}
cr = cairo_create (surf);
cairo_transform (cr, mat);
border = PAT_SIZE/8;
square = (PAT_SIZE - 2*border)/2;
cairo_rectangle (cr, 0, 0, PAT_SIZE, PAT_SIZE);
cairo_clip (cr);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_paint (cr);
cairo_translate (cr, border, border);
cairo_rectangle (cr, 0, 0, square, square);
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_fill (cr);
cairo_translate (cr, square, 0);
cairo_rectangle (cr, 0, 0, square, square);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_fill (cr);
cairo_translate (cr, 0, square);
cairo_rectangle (cr, 0, 0, square, square);
cairo_set_source_rgb (cr, 0, 1, 1);
cairo_fill (cr);
cairo_translate (cr, -square, 0);
cairo_rectangle (cr, 0, 0, square, square);
cairo_set_source_rgb (cr, 1, 1, 0);
cairo_fill (cr);
cairo_destroy (cr);
pat = cairo_pattern_create_for_surface (surf);
cairo_surface_destroy (surf);
cairo_pattern_set_matrix (pat, mat);
return pat;
}
static cairo_test_status_t
record_extents (cairo_t *cr, int width, int height, cairo_bool_t bounded)
{
cairo_pattern_t *pat;
cairo_matrix_t mat;
/* record surface extents (-PAT_SIZE/2, -PAT_SIZE/2) to (PAT_SIZE/2, PAT_SIZE/2) */
cairo_translate (cr, PAD, PAD);
cairo_matrix_init_translate (&mat, -PAT_SIZE/2, -PAT_SIZE/2);
pat = create_pattern (&mat, bounded);
cairo_set_source (cr, pat);
cairo_pattern_destroy (pat);
cairo_paint (cr);
/* record surface extents (-10*PAT_SIZE/2, -10*PAT_SIZE/2) to (10*PAT_SIZE/2, 10*PAT_SIZE/2) */
cairo_translate (cr, PAT_SIZE + PAD, 0);
cairo_matrix_init_translate (&mat, -10.0*PAT_SIZE/2, -10.0*PAT_SIZE/2);
cairo_matrix_scale (&mat, 10, 10);
pat = create_pattern (&mat, bounded);
cairo_set_source (cr, pat);
cairo_pattern_destroy (pat);
cairo_paint (cr);
/* record surface extents (-0.1*PAT_SIZE/2, -0.1*PAT_SIZE/2) to (0.1*PAT_SIZE/2, 0.1*PAT_SIZE/2) */
cairo_translate (cr, PAT_SIZE + PAD, 0);
cairo_matrix_init_translate (&mat, -0.1*PAT_SIZE/2, -0.1*PAT_SIZE/2);
cairo_matrix_scale (&mat, 0.1, 0.1);
pat = create_pattern (&mat, bounded);
cairo_set_source (cr, pat);
cairo_pattern_destroy (pat);
cairo_paint (cr);
/* record surface centered on (0,0) and rotated 45 deg */
cairo_translate (cr, PAT_SIZE + PAD, 0);
cairo_matrix_init_translate (&mat, -PAT_SIZE/sqrt(2), -PAT_SIZE/sqrt(2));
cairo_matrix_rotate (&mat, M_PI/4.0);
cairo_matrix_translate (&mat, PAT_SIZE/2, -PAT_SIZE/2);
pat = create_pattern (&mat, bounded);
cairo_set_source (cr, pat);
cairo_pattern_destroy (pat);
cairo_paint (cr);
return CAIRO_TEST_SUCCESS;
}
static cairo_test_status_t
record_neg_extents_bounded (cairo_t *cr, int width, int height)
{
return record_extents(cr, width, height, TRUE);
}
static cairo_test_status_t
record_neg_extents_unbounded (cairo_t *cr, int width, int height)
{
return record_extents(cr, width, height, FALSE);
}
CAIRO_TEST (record_neg_extents_unbounded,
"Paint unbounded recording pattern with untransformed extents outside of target extents",
"record,transform,pattern", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, record_neg_extents_unbounded)
CAIRO_TEST (record_neg_extents_bounded,
"Paint bounded recording pattern with untransformed extents outside of target extents",
"record,transform,pattern", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, record_neg_extents_bounded)
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