Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 292 insertions, 0 deletions

diff --git a/gfx/cairo/libpixman/src/pixman-linear-gradient.c b/gfx/cairo/libpixman/src/pixman-linear-gradient.c
new file mode 100644
index 0000000000..3f528508a1
--- /dev/null
+++ b/gfx/cairo/libpixman/src/pixman-linear-gradient.c
@@ -0,0 +1,292 @@
+/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
+/*
+ * Copyright © 2000 SuSE, Inc.
+ * Copyright © 2007 Red Hat, Inc.
+ * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
+ *             2005 Lars Knoll & Zack Rusin, Trolltech
+ *
+ * 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 Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdlib.h>
+#include "pixman-private.h"
+
+static pixman_bool_t
+linear_gradient_is_horizontal (pixman_image_t *image,
+			       int             x,
+			       int             y,
+			       int             width,
+			       int             height)
+{
+    linear_gradient_t *linear = (linear_gradient_t *)image;
+    pixman_vector_t v;
+    pixman_fixed_32_32_t l;
+    pixman_fixed_48_16_t dx, dy;
+    double inc;
+
+    if (image->common.transform)
+    {
+	/* projective transformation */
+	if (image->common.transform->matrix[2][0] != 0 ||
+	    image->common.transform->matrix[2][1] != 0 ||
+	    image->common.transform->matrix[2][2] == 0)
+	{
+	    return FALSE;
+	}
+
+	v.vector[0] = image->common.transform->matrix[0][1];
+	v.vector[1] = image->common.transform->matrix[1][1];
+	v.vector[2] = image->common.transform->matrix[2][2];
+    }
+    else
+    {
+	v.vector[0] = 0;
+	v.vector[1] = pixman_fixed_1;
+	v.vector[2] = pixman_fixed_1;
+    }
+
+    dx = linear->p2.x - linear->p1.x;
+    dy = linear->p2.y - linear->p1.y;
+
+    l = dx * dx + dy * dy;
+
+    if (l == 0)
+	return FALSE;
+
+    /*
+     * compute how much the input of the gradient walked changes
+     * when moving vertically through the whole image
+     */
+    inc = height * (double) pixman_fixed_1 * pixman_fixed_1 *
+	(dx * v.vector[0] + dy * v.vector[1]) /
+	(v.vector[2] * (double) l);
+
+    /* check that casting to integer would result in 0 */
+    if (-1 < inc && inc < 1)
+	return TRUE;
+
+    return FALSE;
+}
+
+static uint32_t *
+linear_get_scanline (pixman_iter_t                 *iter,
+		     const uint32_t                *mask,
+		     int                            Bpp,
+		     pixman_gradient_walker_write_t write_pixel,
+		     pixman_gradient_walker_fill_t  fill_pixel)
+{
+    pixman_image_t *image  = iter->image;
+    int             x      = iter->x;
+    int             y      = iter->y;
+    int             width  = iter->width;
+    uint32_t *      buffer = iter->buffer;
+
+    pixman_vector_t v, unit;
+    pixman_fixed_32_32_t l;
+    pixman_fixed_48_16_t dx, dy;
+    gradient_t *gradient = (gradient_t *)image;
+    linear_gradient_t *linear = (linear_gradient_t *)image;
+    uint32_t *end = buffer + width * (Bpp / 4);
+    pixman_gradient_walker_t walker;
+
+    _pixman_gradient_walker_init (&walker, gradient, image->common.repeat);
+
+    /* reference point is the center of the pixel */
+    v.vector[0] = pixman_int_to_fixed (x) + pixman_fixed_1 / 2;
+    v.vector[1] = pixman_int_to_fixed (y) + pixman_fixed_1 / 2;
+    v.vector[2] = pixman_fixed_1;
+
+    if (image->common.transform)
+    {
+	if (!pixman_transform_point_3d (image->common.transform, &v))
+	    return iter->buffer;
+
+	unit.vector[0] = image->common.transform->matrix[0][0];
+	unit.vector[1] = image->common.transform->matrix[1][0];
+	unit.vector[2] = image->common.transform->matrix[2][0];
+    }
+    else
+    {
+	unit.vector[0] = pixman_fixed_1;
+	unit.vector[1] = 0;
+	unit.vector[2] = 0;
+    }
+
+    dx = linear->p2.x - linear->p1.x;
+    dy = linear->p2.y - linear->p1.y;
+
+    l = dx * dx + dy * dy;
+
+    if (l == 0 || unit.vector[2] == 0)
+    {
+	/* affine transformation only */
+	pixman_fixed_32_32_t t, next_inc;
+	double inc;
+
+	if (l == 0 || v.vector[2] == 0)
+	{
+	    t = 0;
+	    inc = 0;
+	}
+	else
+	{
+	    double invden, v2;
+
+	    invden = pixman_fixed_1 * (double) pixman_fixed_1 /
+		(l * (double) v.vector[2]);
+	    v2 = v.vector[2] * (1. / pixman_fixed_1);
+	    t = ((dx * v.vector[0] + dy * v.vector[1]) -
+		 (dx * linear->p1.x + dy * linear->p1.y) * v2) * invden;
+	    inc = (dx * unit.vector[0] + dy * unit.vector[1]) * invden;
+	}
+	next_inc = 0;
+
+	if (((pixman_fixed_32_32_t )(inc * width)) == 0)
+	{
+	    fill_pixel (&walker, t, buffer, end);
+	}
+	else
+	{
+	    int i;
+
+	    i = 0;
+	    while (buffer < end)
+	    {
+		if (!mask || *mask++)
+		{
+		    write_pixel (&walker, t + next_inc, buffer);
+		}
+		i++;
+		next_inc = inc * i;
+		buffer += (Bpp / 4);
+	    }
+	}
+    }
+    else
+    {
+	/* projective transformation */
+        double t;
+
+	t = 0;
+
+	while (buffer < end)
+	{
+	    if (!mask || *mask++)
+	    {
+	        if (v.vector[2] != 0)
+		{
+		    double invden, v2;
+
+		    invden = pixman_fixed_1 * (double) pixman_fixed_1 /
+			(l * (double) v.vector[2]);
+		    v2 = v.vector[2] * (1. / pixman_fixed_1);
+		    t = ((dx * v.vector[0] + dy * v.vector[1]) -
+			 (dx * linear->p1.x + dy * linear->p1.y) * v2) * invden;
+		}
+
+		write_pixel (&walker, t, buffer);
+	    }
+
+	    buffer += (Bpp / 4);
+
+	    v.vector[0] += unit.vector[0];
+	    v.vector[1] += unit.vector[1];
+	    v.vector[2] += unit.vector[2];
+	}
+    }
+
+    iter->y++;
+
+    return iter->buffer;
+}
+
+static uint32_t *
+linear_get_scanline_narrow (pixman_iter_t  *iter,
+			    const uint32_t *mask)
+{
+    return linear_get_scanline (iter, mask, 4,
+				_pixman_gradient_walker_write_narrow,
+				_pixman_gradient_walker_fill_narrow);
+}
+
+
+static uint32_t *
+linear_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+{
+    return linear_get_scanline (iter, NULL, 16,
+				_pixman_gradient_walker_write_wide,
+				_pixman_gradient_walker_fill_wide);
+}
+
+void
+_pixman_linear_gradient_iter_init (pixman_image_t *image, pixman_iter_t  *iter)
+{
+    if (linear_gradient_is_horizontal (
+	    iter->image, iter->x, iter->y, iter->width, iter->height))
+    {
+	if (iter->iter_flags & ITER_NARROW)
+	    linear_get_scanline_narrow (iter, NULL);
+	else
+	    linear_get_scanline_wide (iter, NULL);
+
+	iter->get_scanline = _pixman_iter_get_scanline_noop;
+    }
+    else
+    {
+	if (iter->iter_flags & ITER_NARROW)
+	    iter->get_scanline = linear_get_scanline_narrow;
+	else
+	    iter->get_scanline = linear_get_scanline_wide;
+    }
+}
+
+PIXMAN_EXPORT pixman_image_t *
+pixman_image_create_linear_gradient (const pixman_point_fixed_t *  p1,
+                                     const pixman_point_fixed_t *  p2,
+                                     const pixman_gradient_stop_t *stops,
+                                     int                           n_stops)
+{
+    pixman_image_t *image;
+    linear_gradient_t *linear;
+
+    image = _pixman_image_allocate ();
+
+    if (!image)
+	return NULL;
+
+    linear = &image->linear;
+
+    if (!_pixman_init_gradient (&linear->common, stops, n_stops))
+    {
+	free (image);
+	return NULL;
+    }
+
+    linear->p1 = *p1;
+    linear->p2 = *p2;
+
+    image->type = LINEAR;
+
+    return image;
+}
+