Merge branch 'sunweaver-pr/xrandr-extension-upgrade-1.5' into 3.6.x

Attributes GH PR #137: https://github.com/ArcticaProject/nx-libs/pull/137
Reviewed by: Ulrich Sibiller <uli42@gmx.de>  -- Mon, 20 Jun 2016 12:40:52 -0700

1 files changed, 301 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/randr/rrtransform.c b/nx-X11/programs/Xserver/randr/rrtransform.c
new file mode 100644
index 000000000..4377d09aa
--- /dev/null
+++ b/nx-X11/programs/Xserver/randr/rrtransform.c
@@ -0,0 +1,301 @@
+/*
+ * 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;
+    }
+}