From c2b1f489d7998c83af73c7cb25bbb2bc53f26094 Mon Sep 17 00:00:00 2001 From: Mike Gabriel Date: Mon, 20 Jun 2016 11:10:06 +0200 Subject: Backport RANDR proto version 1.5 to nx-X11's Xserver. Backported to X.org's /xorg/xserver Git hash level: a6b6e8ba026acedef6336b17adf06aebddd5f22f. --- nx-X11/programs/Xserver/randr/rrtransform.c | 301 ++++++++++++++++++++++++++++ 1 file changed, 301 insertions(+) create mode 100644 nx-X11/programs/Xserver/randr/rrtransform.c (limited to 'nx-X11/programs/Xserver/randr/rrtransform.c') 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; + } +} -- cgit v1.2.3