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b5c5fb613d
The PS/PDF backends don't allow a content to be passed in right now, so they fail against the rgb24 tests, but the trivial addition to the constructors will allow them to pass all tests with both content values. And new constructors (currently internal only) to create an image surface with a cairo_content_t rather than a cairo_format_t. Add a cairo_content_t argument to the constructor. Add a cairo_content_t to the constructor and use this content value when constructing intermediate image surfaces in acquire_source, show_page, copy_page, and snapshot. Add image flattening by compositing over white, as is done in cairo-ps-surface.c. Track changes to cairo-paginates-surface which now requires a cairo_content_t value (no change to public PS/PDF constructors yet). Track change in meta-surface and paginated-surface interfaces by now accepting a cairo_content_t rather than a cairo_format_t. Ignore new output files (argb32 from pdf and ps as well as rgb24 from test-fallback, test-meta, and test-paginated). Add new utility for flattening PNG images in order to generate the -argbf-ref.png images. Add image_diff_flattened for comparing flattened output from PS and PDF backend with ARGB reference images by first blending the reference images over white. Get rid of conditional, format-specific background-color initialization before running tests. Now uses ARGB(0,0,0,0) in all cases. Switch from specifying tests with a format value to specifying tests with a content value. Add support for a 'fake' COLOR_ALPHA_FLATTENED content for testing the PS and PDF output against a flattened version of the argb32 reference images (first blended over white). Track change in cairo_ps_surface_create (now requires cairo_content_t value). Adjust tests that draw in default (black) to first paint white so that the results are visible. Adjust ARGB32 reference images for new white background for changed tests. Adjust RGB24 reference images for new black background due to changed initialization (and the tests themselves being unchanged).
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/* imagediff - Compare two images
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*
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* Copyright © 2004 Richard D. Worth
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of Richard Worth
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* not be used in advertising or publicity pertaining to distribution
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* of the software without specific, written prior permission.
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* Richard Worth makes no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express
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* or implied warranty.
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*
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* RICHARD WORTH DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
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* NO EVENT SHALL RICHARD WORTH BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Richard D. Worth <richard@theworths.org> */
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#ifndef BUFFER_DIFF_H
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#define BUFFER_DIFF_H
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/* Returns number of pixels changed.
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* Also fills in a "diff" buffer intended to visually show where the
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* images differ.
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*/
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int
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buffer_diff (unsigned char *buf_a,
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unsigned char *buf_b,
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unsigned char *buf_diff,
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int width,
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int height,
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int stride);
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/* Returns number of pixels changed ignoring the alpha channel.
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* Also fills in a "diff" buffer intended to visually show where the
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* images differ.
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*/
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int
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buffer_diff_noalpha (unsigned char *buf_a,
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unsigned char *buf_b,
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unsigned char *buf_diff,
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int width,
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int height,
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int stride);
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/* Returns number of pixels changed, (or -1 on error).
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* Also saves a "diff" image intended to visually show where the
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* images differ.
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*/
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int
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image_diff (const char *filename_a,
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const char *filename_b,
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const char *filename_diff);
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/* Like image_diff, but blending the contents of b over white first. */
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int
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image_diff_flattened (const char *filename_a,
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const char *filename_b,
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const char *filename_diff);
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#endif
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