diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/a8-mask.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/a8-mask.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/a8-mask.c b/libs/cairo-1.16.0/test/a8-mask.c new file mode 100644 index 0000000..ec70812 --- /dev/null +++ b/libs/cairo-1.16.0/test/a8-mask.c @@ -0,0 +1,201 @@ +/* + * Copyright © Jeff Muizelaar + * + * 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. + * + * JEFF MUIZELAAR 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: Jeff Muizelaar <jeff@infidigm.net> + * Carl Worth <cworth@cworth.org> + */ + +#include "cairo-test.h" + +#define MASK_WIDTH 8 +#define MASK_HEIGHT 8 + +static unsigned char mask[MASK_WIDTH * MASK_HEIGHT] = { + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, + 0x0, 0x0, 0xff, 0x0, 0xff, 0x0, 0x0, 0x0, +}; + +static cairo_test_status_t +check_status (const cairo_test_context_t *ctx, + cairo_status_t status, + cairo_status_t expected) +{ + if (status == expected) + return CAIRO_TEST_SUCCESS; + + cairo_test_log (ctx, + "Error: Expected status value %d (%s), received %d (%s)\n", + expected, + cairo_status_to_string (expected), + status, + cairo_status_to_string (status)); + return CAIRO_TEST_FAILURE; +} + +static cairo_test_status_t +test_surface_with_width_and_stride (const cairo_test_context_t *ctx, + int width, int stride, + cairo_status_t expected) +{ + cairo_test_status_t status; + cairo_surface_t *surface; + cairo_t *cr; + int len; + unsigned char *data; + + cairo_test_log (ctx, + "Creating surface with width %d and stride %d\n", + width, stride); + + len = stride; + if (len < 0) + len = -len; + data = xmalloc (len); + + surface = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_A8, + width, 1, stride); + cr = cairo_create (surface); + + cairo_paint (cr); + + status = check_status (ctx, cairo_surface_status (surface), expected); + if (status) + goto BAIL; + + status = check_status (ctx, cairo_status (cr), expected); + if (status) + goto BAIL; + + BAIL: + cairo_destroy (cr); + cairo_surface_destroy (surface); + free (data); + return status; +} + +static cairo_test_status_t +draw (cairo_t *cr, int dst_width, int dst_height) +{ + int stride, row; + unsigned char *src, *dst, *mask_aligned; + cairo_surface_t *surface; + + /* Now test actually drawing through our mask data, allocating and + * copying with the proper stride. */ + stride = cairo_format_stride_for_width (CAIRO_FORMAT_A8, + MASK_WIDTH); + + mask_aligned = xmalloc (stride * MASK_HEIGHT); + + src = mask; + dst = mask_aligned; + for (row = 0; row < MASK_HEIGHT; row++) { + memcpy (dst, src, MASK_WIDTH); + src += MASK_WIDTH; + dst += stride; + } + + surface = cairo_image_surface_create_for_data (mask_aligned, + CAIRO_FORMAT_A8, + MASK_WIDTH, + MASK_HEIGHT, + stride); + + /* Paint background blue */ + cairo_set_source_rgb (cr, 0, 0, 1); /* blue */ + cairo_paint (cr); + + /* Then paint red through our mask */ + cairo_set_source_rgb (cr, 1, 0, 0); /* red */ + cairo_mask_surface (cr, surface, 0, 0); + cairo_surface_destroy (surface); + + free (mask_aligned); + + return CAIRO_TEST_SUCCESS; +} + +static cairo_test_status_t +preamble (cairo_test_context_t *ctx) +{ + cairo_test_status_t status = CAIRO_TEST_SUCCESS; + int test_width; + + for (test_width = 0; test_width < 40; test_width++) { + int stride = cairo_format_stride_for_width (CAIRO_FORMAT_A8, + test_width); + cairo_status_t expected; + + /* First create a surface using the width as the stride, + * (most of these should fail). + */ + expected = (stride == test_width) ? + CAIRO_STATUS_SUCCESS : CAIRO_STATUS_INVALID_STRIDE; + + status = test_surface_with_width_and_stride (ctx, + test_width, + test_width, + expected); + if (status) + return status; + + status = test_surface_with_width_and_stride (ctx, + test_width, + -test_width, + expected); + if (status) + return status; + + + /* Then create a surface using the correct stride, + * (should always succeed). + */ + status = test_surface_with_width_and_stride (ctx, + test_width, + stride, + CAIRO_STATUS_SUCCESS); + if (status) + return status; + + status = test_surface_with_width_and_stride (ctx, + test_width, + -stride, + CAIRO_STATUS_SUCCESS); + if (status) + return status; + } + + return status; +} + +CAIRO_TEST (a8_mask, + "test masks of CAIRO_FORMAT_A8", + "alpha, mask", /* keywords */ + NULL, /* requirements */ + 8, 8, + preamble, draw) |