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-rw-r--r--libs/cairo-1.16.0/test/coverage.c506
1 files changed, 0 insertions, 506 deletions
diff --git a/libs/cairo-1.16.0/test/coverage.c b/libs/cairo-1.16.0/test/coverage.c
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--- a/libs/cairo-1.16.0/test/coverage.c
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-/*
- * Copyright 2010 Intel Corporation
- *
- * 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.
- *
- * Author: Chris Wilson <chris@chris-wilson.co.uk>
- */
-
-#include "cairo-test.h"
-
-/* Test the fidelity of the rasterisation, because Cairo is my favourite
- * driver test suite.
- */
-
-#define GENERATE_REFERENCE 0
-
-#define WIDTH 256
-#define HEIGHT 40
-
-#include "../src/cairo-fixed-type-private.h"
-#define PRECISION (1 << CAIRO_FIXED_FRAC_BITS)
-
-/* XXX beware multithreading! */
-static uint32_t state;
-
-static uint32_t
-hars_petruska_f54_1_random (void)
-{
-#define rol(x,k) ((x << k) | (x >> (32-k)))
- return state = (state ^ rol (state, 5) ^ rol (state, 24)) + 0x37798849;
-#undef rol
-}
-
-static double
-random_offset (int range, int precise)
-{
- double x = hars_petruska_f54_1_random() / (double) UINT32_MAX * range / WIDTH;
- if (precise)
- x = floor (x * PRECISION) / PRECISION;
- return x;
-}
-
-static cairo_test_status_t
-rectangles (cairo_t *cr, int width, int height)
-{
- int x, y, channel;
-
- state = 0x12345678;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1, x * x * 1.0 / (WIDTH * WIDTH));
- cairo_rectangle (cr, x, 0, 1, HEIGHT);
- cairo_fill (cr);
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
- for (channel = 0; channel < 3; channel++) {
- switch (channel) {
- default:
- case 0: cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); break;
- case 1: cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); break;
- case 2: cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); break;
- }
-
- for (x = 0; x < WIDTH; x++) {
- for (y = 0; y < HEIGHT; y++) {
- double dx = random_offset (WIDTH - x, TRUE);
- double dy = random_offset (WIDTH - x, TRUE);
- cairo_rectangle (cr, x + dx, y + dy, x / (double) WIDTH, x / (double) WIDTH);
- }
- }
- cairo_fill (cr);
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-rhombus (cairo_t *cr, int width, int height)
-{
- int x, y;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (y = 0; y < WIDTH; y++) {
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1,
- x * y / (2. * WIDTH * WIDTH));
- cairo_rectangle (cr, 2*x, 2*y, 2, 2);
- cairo_fill (cr);
- }
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
- cairo_set_source_rgb (cr, 1, 1, 1);
-
- for (y = 0; y < WIDTH; y++) {
- double yf = y / (double) WIDTH;
- for (x = 0; x < WIDTH; x++) {
- double xf = x / (double) WIDTH;
-
- cairo_move_to (cr,
- 2*x + 1 - xf,
- 2*y + 1);
- cairo_line_to (cr,
- 2*x + 1,
- 2*y + 1 - yf);
- cairo_line_to (cr,
- 2*x + 1 + xf,
- 2*y + 1);
- cairo_line_to (cr,
- 2*x + 1,
- 2*y + 1 + yf);
- cairo_close_path (cr);
- }
- }
-
- cairo_fill (cr);
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-intersecting_quads (cairo_t *cr, int width, int height)
-{
- int x, y, channel;
-
- state = 0x12345678;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1, x * x * 0.5 / (WIDTH * WIDTH));
- cairo_rectangle (cr, x, 0, 1, HEIGHT);
- cairo_fill (cr);
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
- for (channel = 0; channel < 3; channel++) {
- switch (channel) {
- default:
- case 0: cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); break;
- case 1: cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); break;
- case 2: cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); break;
- }
-
- for (x = 0; x < WIDTH; x++) {
- double step = x / (double) WIDTH;
- for (y = 0; y < HEIGHT; y++) {
- double dx = random_offset (WIDTH - x, TRUE);
- double dy = random_offset (WIDTH - x, TRUE);
- cairo_move_to (cr, x + dx, y + dy);
- cairo_rel_line_to (cr, step, step);
- cairo_rel_line_to (cr, 0, -step);
- cairo_rel_line_to (cr, -step, step);
- cairo_close_path (cr);
- }
- }
- cairo_fill (cr);
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-intersecting_triangles (cairo_t *cr, int width, int height)
-{
- int x, y, channel;
-
- state = 0x12345678;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1, x * x * 0.75 / (WIDTH * WIDTH));
- cairo_rectangle (cr, x, 0, 1, HEIGHT);
- cairo_fill (cr);
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
- for (channel = 0; channel < 3; channel++) {
- switch (channel) {
- default:
- case 0: cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); break;
- case 1: cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); break;
- case 2: cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); break;
- }
-
- for (x = 0; x < WIDTH; x++) {
- double step = x / (double) WIDTH;
- for (y = 0; y < HEIGHT; y++) {
- double dx = random_offset (WIDTH - x, TRUE);
- double dy = random_offset (WIDTH - x, TRUE);
-
- /* left */
- cairo_move_to (cr, x + dx, y + dy);
- cairo_rel_line_to (cr, 0, step);
- cairo_rel_line_to (cr, step, 0);
- cairo_close_path (cr);
-
- /* right, mirrored */
- cairo_move_to (cr, x + dx + step, y + dy + step);
- cairo_rel_line_to (cr, 0, -step);
- cairo_rel_line_to (cr, -step, step);
- cairo_close_path (cr);
- }
- }
- cairo_fill (cr);
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-triangles (cairo_t *cr, int width, int height)
-{
- int x, y, channel;
-
- state = 0x12345678;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1, x * x * 0.5 / (WIDTH * WIDTH));
- cairo_rectangle (cr, x, 0, 1, HEIGHT);
- cairo_fill (cr);
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
- for (channel = 0; channel < 3; channel++) {
- switch (channel) {
- default:
- case 0: cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); break;
- case 1: cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); break;
- case 2: cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); break;
- }
-
- for (x = 0; x < WIDTH; x++) {
- for (y = 0; y < HEIGHT; y++) {
- double dx = random_offset (WIDTH - x, TRUE);
- double dy = random_offset (WIDTH - x, TRUE);
- cairo_move_to (cr, x + dx, y + dy);
- cairo_rel_line_to (cr, x / (double) WIDTH, 0);
- cairo_rel_line_to (cr, 0, x / (double) WIDTH);
- cairo_close_path (cr);
- }
- }
- cairo_fill (cr);
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-abutting (cairo_t *cr, int width, int height)
-{
- int x, y;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
- cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.75);
-
-#if GENERATE_REFERENCE
- cairo_paint (cr);
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
-
- for (y = 0; y < 16; y++) {
- for (x = 0; x < 16; x++) {
- double theta = (y * 16 + x) * M_PI / 512;
- double cx = 16 * cos (theta) + x * 16;
- double cy = 16 * sin (theta) + y * 16;
-
- cairo_move_to (cr, x * 16, y * 16);
- cairo_line_to (cr, cx, cy);
- cairo_line_to (cr, (x + 1) * 16, y * 16);
- cairo_fill (cr);
-
- cairo_move_to (cr, (x + 1) * 16, y * 16);
- cairo_line_to (cr, cx, cy);
- cairo_line_to (cr, (x + 1) * 16, (y + 1) * 16);
- cairo_fill (cr);
-
- cairo_move_to (cr, (x + 1) * 16, (y + 1) * 16);
- cairo_line_to (cr, cx, cy);
- cairo_line_to (cr, x * 16, (y + 1) * 16);
- cairo_fill (cr);
-
- cairo_move_to (cr, x * 16, (y + 1) * 16);
- cairo_line_to (cr, cx, cy);
- cairo_line_to (cr, x * 16, y * 16);
- cairo_fill (cr);
- }
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-column_triangles (cairo_t *cr, int width, int height)
-{
- int x, y, i, channel;
-
- state = 0x12345678;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1, x * 0.5 / WIDTH);
- cairo_rectangle (cr, x, 0, 1, HEIGHT);
- cairo_fill (cr);
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
- for (channel = 0; channel < 3; channel++) {
- switch (channel) {
- default:
- case 0: cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); break;
- case 1: cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); break;
- case 2: cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); break;
- }
-
- for (x = 0; x < WIDTH; x++) {
- double step = x / (double) (2 * WIDTH);
- for (y = 0; y < HEIGHT; y++) {
- for (i = 0; i < PRECISION; i++) {
- double dy = random_offset (WIDTH - x, FALSE);
-
- /*
- * We want to test some sharing of edges to further
- * stress the rasterisers, so instead of using one
- * tall triangle, it is split into two, with vertical
- * edges on either side that may co-align with their
- * neighbours:
- *
- * s --- . ---
- * t | |\ |
- * e | | \ |
- * p --- .... | 2 * step = x / WIDTH
- * \ | |
- * \| |
- * . ---
- * |---|
- * 1 / PRECISION
- *
- * Each column contains two triangles of width one quantum and
- * total height of (x / WIDTH), thus the total area covered by all
- * columns in each pixel is .5 * (x / WIDTH).
- */
-
- cairo_move_to (cr, x + i / (double) PRECISION, y + dy);
- cairo_rel_line_to (cr, 0, step);
- cairo_rel_line_to (cr, 1 / (double) PRECISION, step);
- cairo_rel_line_to (cr, 0, -step);
- cairo_close_path (cr);
- }
- cairo_fill (cr); /* do these per-pixel due to the extra volume of edges */
- }
- }
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-static cairo_test_status_t
-row_triangles (cairo_t *cr, int width, int height)
-{
- int x, y, i, channel;
-
- state = 0x12345678;
-
- cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
- cairo_paint (cr);
-
-#if GENERATE_REFERENCE
- for (x = 0; x < WIDTH; x++) {
- cairo_set_source_rgba (cr, 1, 1, 1, x * 0.5 / WIDTH);
- cairo_rectangle (cr, x, 0, 1, HEIGHT);
- cairo_fill (cr);
- }
-#else
- cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
- for (channel = 0; channel < 3; channel++) {
- switch (channel) {
- default:
- case 0: cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); break;
- case 1: cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); break;
- case 2: cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); break;
- }
-
- for (x = 0; x < WIDTH; x++) {
- double step = x / (double) (2 * WIDTH);
- for (y = 0; y < HEIGHT; y++) {
- for (i = 0; i < PRECISION; i++) {
- double dx = random_offset (WIDTH - x, FALSE);
-
- /* See column_triangles() for a transposed description
- * of this geometry.
- */
-
- cairo_move_to (cr, x + dx, y + i / (double) PRECISION);
- cairo_rel_line_to (cr, step, 0);
- cairo_rel_line_to (cr, step, 1 / (double) PRECISION);
- cairo_rel_line_to (cr, -step, 0);
- cairo_close_path (cr);
- }
- cairo_fill (cr); /* do these per-pixel due to the extra volume of edges */
- }
- }
- }
-#endif
-
- return CAIRO_TEST_SUCCESS;
-}
-
-CAIRO_TEST (coverage_rectangles,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- WIDTH, HEIGHT,
- NULL, rectangles)
-
-CAIRO_TEST (coverage_rhombus,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- 2*WIDTH, 2*WIDTH,
- NULL, rhombus)
-
-CAIRO_TEST (coverage_intersecting_quads,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- WIDTH, HEIGHT,
- NULL, intersecting_quads)
-
-CAIRO_TEST (coverage_intersecting_triangles,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- WIDTH, HEIGHT,
- NULL, intersecting_triangles)
-CAIRO_TEST (coverage_row_triangles,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- WIDTH, HEIGHT,
- NULL, row_triangles)
-CAIRO_TEST (coverage_column_triangles,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- WIDTH, HEIGHT,
- NULL, column_triangles)
-CAIRO_TEST (coverage_triangles,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- WIDTH, HEIGHT,
- NULL, triangles)
-CAIRO_TEST (coverage_abutting,
- "Check the fidelity of the rasterisation.",
- NULL, /* keywords */
- "target=raster", /* requirements */
- 16*16, 16*16,
- NULL, abutting)
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-01 13:44:51 +0000