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-rw-r--r--nx-X11/programs/Xserver/randr/rrtransform.c301
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diff --git a/nx-X11/programs/Xserver/randr/rrtransform.c b/nx-X11/programs/Xserver/randr/rrtransform.c
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+/*
+ * Copyright © 2007 Keith Packard
+ *
+ * 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 the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make 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.
+ */
+
+#include "randrstr.h"
+#include "rrtransform.h"
+
+void
+RRTransformInit(RRTransformPtr transform)
+{
+ pixman_transform_init_identity(&transform->transform);
+ pixman_f_transform_init_identity(&transform->f_transform);
+ pixman_f_transform_init_identity(&transform->f_inverse);
+ transform->filter = NULL;
+ transform->params = NULL;
+ transform->nparams = 0;
+}
+
+void
+RRTransformFini(RRTransformPtr transform)
+{
+ xfree(transform->params);
+}
+
+Bool
+RRTransformEqual(RRTransformPtr a, RRTransformPtr b)
+{
+ if (a && pixman_transform_is_identity(&a->transform))
+ a = NULL;
+ if (b && pixman_transform_is_identity(&b->transform))
+ b = NULL;
+ if (a == NULL && b == NULL)
+ return TRUE;
+ if (a == NULL || b == NULL)
+ return FALSE;
+ if (memcmp(&a->transform, &b->transform, sizeof(a->transform)) != 0)
+ return FALSE;
+ if (a->filter != b->filter)
+ return FALSE;
+ if (a->nparams != b->nparams)
+ return FALSE;
+ if (memcmp(a->params, b->params, a->nparams * sizeof(xFixed)) != 0)
+ return FALSE;
+ return TRUE;
+}
+
+Bool
+RRTransformSetFilter(RRTransformPtr dst,
+ PictFilterPtr filter,
+ xFixed * params, int nparams, int width, int height)
+{
+ xFixed *new_params;
+
+ if (nparams) {
+#ifndef NXAGENT_SERVER
+ new_params = xallocarray(nparams, sizeof(xFixed));
+#else /* !defined(NXAGENT_SERVER) */
+ new_params = xalloc(nparams * sizeof(xFixed));
+#endif /* !defined(NXAGENT_SERVER) */
+ if (!new_params)
+ return FALSE;
+ memcpy(new_params, params, nparams * sizeof(xFixed));
+ }
+ else
+ new_params = NULL;
+ xfree(dst->params);
+ dst->filter = filter;
+ dst->params = new_params;
+ dst->nparams = nparams;
+ dst->width = width;
+ dst->height = height;
+ return TRUE;
+}
+
+Bool
+RRTransformCopy(RRTransformPtr dst, RRTransformPtr src)
+{
+ if (src && pixman_transform_is_identity(&src->transform))
+ src = NULL;
+
+ if (src) {
+ if (!RRTransformSetFilter(dst, src->filter,
+ src->params, src->nparams, src->width,
+ src->height))
+ return FALSE;
+ dst->transform = src->transform;
+ dst->f_transform = src->f_transform;
+ dst->f_inverse = src->f_inverse;
+ }
+ else {
+ if (!RRTransformSetFilter(dst, NULL, NULL, 0, 0, 0))
+ return FALSE;
+ pixman_transform_init_identity(&dst->transform);
+ pixman_f_transform_init_identity(&dst->f_transform);
+ pixman_f_transform_init_identity(&dst->f_inverse);
+ }
+ return TRUE;
+}
+
+#define F(x) IntToxFixed(x)
+
+static void
+RRTransformRescale(struct pixman_f_transform *f_transform, double limit)
+{
+ double max = 0, v, scale;
+ int i, j;
+
+ for (j = 0; j < 3; j++)
+ for (i = 0; i < 3; i++)
+ if ((v = fabs(f_transform->m[j][i])) > max)
+ max = v;
+ scale = limit / max;
+ for (j = 0; j < 3; j++)
+ for (i = 0; i < 3; i++)
+ f_transform->m[j][i] *= scale;
+}
+
+/*
+ * Compute the complete transformation matrix including
+ * client-specified transform, rotation/reflection values and the crtc
+ * offset.
+ *
+ * Return TRUE if the resulting transform is not a simple translation.
+ */
+Bool
+RRTransformCompute(int x,
+ int y,
+ int width,
+ int height,
+ Rotation rotation,
+ RRTransformPtr rr_transform,
+ PictTransformPtr transform,
+ struct pixman_f_transform *f_transform,
+ struct pixman_f_transform *f_inverse)
+{
+ PictTransform t_transform, inverse;
+ struct pixman_f_transform tf_transform, tf_inverse;
+ Bool overflow = FALSE;
+
+ if (!transform)
+ transform = &t_transform;
+ if (!f_transform)
+ f_transform = &tf_transform;
+ if (!f_inverse)
+ f_inverse = &tf_inverse;
+
+ pixman_transform_init_identity(transform);
+ pixman_transform_init_identity(&inverse);
+ pixman_f_transform_init_identity(f_transform);
+ pixman_f_transform_init_identity(f_inverse);
+ if (rotation != RR_Rotate_0) {
+ double f_rot_cos, f_rot_sin, f_rot_dx, f_rot_dy;
+ double f_scale_x, f_scale_y, f_scale_dx, f_scale_dy;
+ xFixed rot_cos, rot_sin, rot_dx, rot_dy;
+ xFixed scale_x, scale_y, scale_dx, scale_dy;
+
+ /* rotation */
+ switch (rotation & 0xf) {
+ default:
+ case RR_Rotate_0:
+ f_rot_cos = 1;
+ f_rot_sin = 0;
+ f_rot_dx = 0;
+ f_rot_dy = 0;
+ rot_cos = F(1);
+ rot_sin = F(0);
+ rot_dx = F(0);
+ rot_dy = F(0);
+ break;
+ case RR_Rotate_90:
+ f_rot_cos = 0;
+ f_rot_sin = 1;
+ f_rot_dx = height;
+ f_rot_dy = 0;
+ rot_cos = F(0);
+ rot_sin = F(1);
+ rot_dx = F(height);
+ rot_dy = F(0);
+ break;
+ case RR_Rotate_180:
+ f_rot_cos = -1;
+ f_rot_sin = 0;
+ f_rot_dx = width;
+ f_rot_dy = height;
+ rot_cos = F(~0u);
+ rot_sin = F(0);
+ rot_dx = F(width);
+ rot_dy = F(height);
+ break;
+ case RR_Rotate_270:
+ f_rot_cos = 0;
+ f_rot_sin = -1;
+ f_rot_dx = 0;
+ f_rot_dy = width;
+ rot_cos = F(0);
+ rot_sin = F(~0u);
+ rot_dx = F(0);
+ rot_dy = F(width);
+ break;
+ }
+
+ pixman_transform_rotate(transform, &inverse, rot_cos, rot_sin);
+ pixman_transform_translate(transform, &inverse, rot_dx, rot_dy);
+ pixman_f_transform_rotate(f_transform, f_inverse, f_rot_cos, f_rot_sin);
+ pixman_f_transform_translate(f_transform, f_inverse, f_rot_dx,
+ f_rot_dy);
+
+ /* reflection */
+ f_scale_x = 1;
+ f_scale_dx = 0;
+ f_scale_y = 1;
+ f_scale_dy = 0;
+ scale_x = F(1);
+ scale_dx = 0;
+ scale_y = F(1);
+ scale_dy = 0;
+ if (rotation & RR_Reflect_X) {
+ f_scale_x = -1;
+ scale_x = F(~0u);
+ if (rotation & (RR_Rotate_0 | RR_Rotate_180)) {
+ f_scale_dx = width;
+ scale_dx = F(width);
+ }
+ else {
+ f_scale_dx = height;
+ scale_dx = F(height);
+ }
+ }
+ if (rotation & RR_Reflect_Y) {
+ f_scale_y = -1;
+ scale_y = F(~0u);
+ if (rotation & (RR_Rotate_0 | RR_Rotate_180)) {
+ f_scale_dy = height;
+ scale_dy = F(height);
+ }
+ else {
+ f_scale_dy = width;
+ scale_dy = F(width);
+ }
+ }
+
+ pixman_transform_scale(transform, &inverse, scale_x, scale_y);
+ pixman_f_transform_scale(f_transform, f_inverse, f_scale_x, f_scale_y);
+ pixman_transform_translate(transform, &inverse, scale_dx, scale_dy);
+ pixman_f_transform_translate(f_transform, f_inverse, f_scale_dx,
+ f_scale_dy);
+ }
+
+#ifdef RANDR_12_INTERFACE
+ if (rr_transform) {
+ if (!pixman_transform_multiply
+ (transform, &rr_transform->transform, transform))
+ overflow = TRUE;
+ pixman_f_transform_multiply(f_transform, &rr_transform->f_transform,
+ f_transform);
+ pixman_f_transform_multiply(f_inverse, f_inverse,
+ &rr_transform->f_inverse);
+ }
+#endif
+ /*
+ * Compute the class of the resulting transform
+ */
+ if (!overflow && pixman_transform_is_identity(transform)) {
+ pixman_transform_init_translate(transform, F(x), F(y));
+
+ pixman_f_transform_init_translate(f_transform, x, y);
+ pixman_f_transform_init_translate(f_inverse, -x, -y);
+ return FALSE;
+ }
+ else {
+ pixman_f_transform_translate(f_transform, f_inverse, x, y);
+ if (!pixman_transform_translate(transform, &inverse, F(x), F(y)))
+ overflow = TRUE;
+ if (overflow) {
+ struct pixman_f_transform f_scaled;
+
+ f_scaled = *f_transform;
+ RRTransformRescale(&f_scaled, 16384.0);
+ pixman_transform_from_pixman_f_transform(transform, &f_scaled);
+ }
+ return TRUE;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 19:59:54 +0000