+++ /dev/null
-/*
- * Copyright (C) 2011 Red Hat Inc.
- *
- * Author:
- * Benjamin Otte <otte@gnome.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "config.h"
-
-#include "reftest-compare.h"
-
-static void
-get_surface_size (cairo_surface_t *surface,
- int *width,
- int *height)
-{
- cairo_t *cr;
- double x1, x2, y1, y2;
-
- cr = cairo_create (surface);
- cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
- cairo_destroy (cr);
-
- g_assert (x1 == 0 && y1 == 0);
- g_assert (x2 > 0 && y2 > 0);
- g_assert ((int) x2 == x2 && (int) y2 == y2);
-
- *width = x2;
- *height = y2;
-}
-
-static cairo_surface_t *
-coerce_surface_for_comparison (cairo_surface_t *surface,
- int width,
- int height)
-{
- cairo_surface_t *coerced;
- cairo_t *cr;
-
- coerced = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
- width,
- height);
- cr = cairo_create (coerced);
-
- cairo_set_source_surface (cr, surface, 0, 0);
- cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
- cairo_paint (cr);
-
- cairo_destroy (cr);
-
- g_assert (cairo_surface_status (coerced) == CAIRO_STATUS_SUCCESS);
-
- return coerced;
-}
-
-/* Compares two CAIRO_FORMAT_ARGB32 buffers, returning NULL if the
- * buffers are equal or a surface containing a diff between the two
- * surfaces.
- *
- * This function should be rewritten to compare all formats supported by
- * cairo_format_t instead of taking a mask as a parameter.
- *
- * This function is originally from cairo:test/buffer-diff.c.
- * Copyright © 2004 Richard D. Worth
- */
-static cairo_surface_t *
-buffer_diff_core (const guchar *buf_a,
- int stride_a,
- const guchar *buf_b,
- int stride_b,
- int width,
- int height)
-{
- int x, y;
- guchar *buf_diff = NULL;
- int stride_diff = 0;
- cairo_surface_t *diff = NULL;
-
- for (y = 0; y < height; y++)
- {
- const guint32 *row_a = (const guint32 *) (buf_a + y * stride_a);
- const guint32 *row_b = (const guint32 *) (buf_b + y * stride_b);
- guint32 *row = (guint32 *) (buf_diff + y * stride_diff);
-
- for (x = 0; x < width; x++)
- {
- int channel;
- guint32 diff_pixel = 0;
-
- /* check if the pixels are the same */
- if (row_a[x] == row_b[x])
- continue;
-
- if (diff == NULL)
- {
- diff = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
- width,
- height);
- g_assert (cairo_surface_status (diff) == CAIRO_STATUS_SUCCESS);
- buf_diff = cairo_image_surface_get_data (diff);
- stride_diff = cairo_image_surface_get_stride (diff);
- row = (guint32 *) (buf_diff + y * stride_diff);
- }
-
- /* calculate a difference value for all 4 channels */
- for (channel = 0; channel < 4; channel++)
- {
- int value_a = (row_a[x] >> (channel*8)) & 0xff;
- int value_b = (row_b[x] >> (channel*8)) & 0xff;
- guint channel_diff;
-
- channel_diff = ABS (value_a - value_b);
- channel_diff *= 4; /* emphasize */
- if (channel_diff)
- channel_diff += 128; /* make sure it's visible */
- if (channel_diff > 255)
- channel_diff = 255;
- diff_pixel |= channel_diff << (channel*8);
- }
-
- if ((diff_pixel & 0x00ffffff) == 0)
- {
- /* alpha only difference, convert to luminance */
- guint8 alpha = diff_pixel >> 24;
- diff_pixel = alpha * 0x010101;
- }
-
- row[x] = diff_pixel;
- }
- }
-
- return diff;
-}
-
-cairo_surface_t *
-reftest_compare_surfaces (cairo_surface_t *surface1,
- cairo_surface_t *surface2)
-{
- int w1, h1, w2, h2, w, h;
- cairo_surface_t *coerced1, *coerced2, *diff;
-
- get_surface_size (surface1, &w1, &h1);
- get_surface_size (surface2, &w2, &h2);
- w = MAX (w1, w2);
- h = MAX (h1, h2);
- coerced1 = coerce_surface_for_comparison (surface1, w, h);
- coerced2 = coerce_surface_for_comparison (surface2, w, h);
-
- diff = buffer_diff_core (cairo_image_surface_get_data (coerced1),
- cairo_image_surface_get_stride (coerced1),
- cairo_image_surface_get_data (coerced2),
- cairo_image_surface_get_stride (coerced2),
- w, h);
-
- cairo_surface_destroy (coerced1);
- cairo_surface_destroy (coerced2);
-
- return diff;
-}
-
+++ /dev/null
-/* GTK - The GIMP Toolkit
- * Copyright (C) 2014 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef __REFTEST_COMPARE_H__
-#define __REFTEST_COMPARE_H__
-
-#include <gtk/gtk.h>
-
-G_BEGIN_DECLS
-
-cairo_surface_t * reftest_compare_surfaces (cairo_surface_t *surface1,
- cairo_surface_t *surface2);
-
-G_END_DECLS
-
-#endif /* __REFTEST_COMPARE_H__ */
projects / gtk4.git / commitdiff