/* * 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 */ #include "cairo-test.h" #include #include #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)