[PATCH xinput] Add support for device-to-screen mapping
Simon Thum
simon.thum at gmx.de
Sat Jul 16 10:00:23 PDT 2011
Hi Peter,
I like this patch, but I'd add a check for absolute devices. It's
neither currently possible nor feasible with relative devices.
In any case, it's
Reviewed-by: Simon Thum <simon.thum at gmx.de>
On 07/06/2011 12:54 AM, Peter Hutterer wrote:
> xinput map-to-crtc "device name" "VGA0" will map to the CRTC "VGA0" by
> manipulating the transformation matrix accordingly. And because the NVIDIA
> binary driver still exists, Xinerama is supported to. Maybe in another few
> years, they'll catch up.
>
> Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
> ---
> configure.ac | 2 +-
> man/xinput.man | 10 ++-
> src/Makefile.am | 2 +-
> src/transform.c | 263 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> src/xinput.c | 4 +
> src/xinput.h | 1 +
> 6 files changed, 279 insertions(+), 3 deletions(-)
> create mode 100644 src/transform.c
>
> diff --git a/configure.ac b/configure.ac
> index 9e18376..37f998f 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -38,7 +38,7 @@ XORG_MACROS_VERSION(1.8)
> XORG_DEFAULT_OPTIONS
>
> # Obtain compiler/linker options for dependencies
> -PKG_CHECK_MODULES(XINPUT, x11 xext [xi >= 1.2] [inputproto >= 1.5])
> +PKG_CHECK_MODULES(XINPUT, x11 xext [xi >= 1.2] [inputproto >= 1.5] xrandr xinerama)
>
> # XI2 support
> PKG_CHECK_MODULES(XI2, [xi >= 1.2.99.2] [inputproto >= 1.9.99.15],
> diff --git a/man/xinput.man b/man/xinput.man
> index 8a348d1..56cc654 100644
> --- a/man/xinput.man
> +++ b/man/xinput.man
> @@ -139,6 +139,14 @@ Remove \fIslave\fP from its current master device.
> Set the ClientPointer for the client owning \fIwindow\fP to \fImaster\fP.
> \fImaster\fP must specify a master pointer.
> .PP
> +.TP 8
> +.B --map-to-crtc \fIdevice\fP \fIcrtc\fP
> +Restricts the movements of the absolute \fIdevice\fP to the RandR
> +\fIcrtc\fP. The CRTC name must match a currently connected CRTC (see
> +\fIxrandr(__appmansuffix__)\fP). If the NVIDIA binary driver is
> +detected or RandR 1.2 or later is not available, a Xinerama output may be
> +specified as "HEAD-N", with N being the Xinerama screen number.
> +.PP
> \fIdevice\fP can be the device name as a string or the XID of the
> device.
> .PP
> @@ -151,7 +159,7 @@ device.
> \fIproperty\fP can be the property as a string or the Atom value.
> .PP
> .SH "SEE ALSO"
> -X(__miscmansuffix__), xset(__appmansuffix__)
> +X(__miscmansuffix__), xset(__appmansuffix__), xrandr(__appmansuffix__)
> .SH COPYRIGHT
> Copyright 1996,1997, Frederic Lepied.
> .PP
> diff --git a/src/Makefile.am b/src/Makefile.am
> index c33fae3..985207b 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -27,7 +27,7 @@ xinput_LDADD = $(XINPUT_LIBS)
>
>
> if HAVE_XI2
> -xinput2_files = hierarchy.c setcp.c test_xi2.c
> +xinput2_files = hierarchy.c setcp.c test_xi2.c transform.c
> endif
>
> xinput_SOURCES = \
> diff --git a/src/transform.c b/src/transform.c
> new file mode 100644
> index 0000000..c1a065f
> --- /dev/null
> +++ b/src/transform.c
> @@ -0,0 +1,263 @@
> +/*
> + * Copyright © 2011 Red Hat, Inc.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + */
> +
> +
> +#include "xinput.h"
> +#include <string.h>
> +#include <X11/extensions/Xrandr.h>
> +#include <X11/extensions/Xinerama.h>
> +
> +
> +typedef struct Matrix {
> + float m[9];
> +} Matrix;
> +
> +static void matrix_set(Matrix *m, int row, int col, float val)
> +{
> + m->m[row * 3 + col] = val;
> +}
> +
> +static void matrix_set_unity(Matrix *m)
> +{
> + memset(m, 0, sizeof(m->m));
> + matrix_set(m, 0, 0, 1);
> + matrix_set(m, 1, 1, 1);
> + matrix_set(m, 2, 2, 1);
> +}
> +
> +#if DEBUG
> +static void matrix_print(const Matrix *m)
> +{
> + printf("[ %3.3f %3.3f %3.3f ]\n", m->m[0], m->m[1], m->m[2]);
> + printf("[ %3.3f %3.3f %3.3f ]\n", m->m[3], m->m[4], m->m[5]);
> + printf("[ %3.3f %3.3f %3.3f ]\n", m->m[6], m->m[7], m->m[8]);
> +}
> +#endif
> +
> +static int
> +apply_matrix(Display *dpy, int deviceid, Matrix *m)
> +{
> + Atom prop_float, prop_matrix;
> +
> + union {
> + unsigned char *c;
> + float *f;
> + } data;
> + int format_return;
> + Atom type_return;
> + unsigned long nitems;
> + unsigned long bytes_after;
> +
> + int rc;
> +
> + prop_float = XInternAtom(dpy, "FLOAT", False);
> + prop_matrix = XInternAtom(dpy, "Coordinate Transformation Matrix", False);
> +
> + if (!prop_float)
> + {
> + fprintf(stderr, "Float atom not found. This server is too old.\n");
> + return EXIT_FAILURE;
> + }
> + if (!prop_matrix)
> + {
> + fprintf(stderr, "Coordinate transformation matrix not found. This "
> + "server is too old\n");
> + return EXIT_FAILURE;
> + }
> +
> + rc = XIGetProperty(dpy, deviceid, prop_matrix, 0, 9, False, prop_float,
> + &type_return, &format_return, &nitems, &bytes_after,
> + &data.c);
> + if (rc != Success || prop_float != type_return || format_return != 32 ||
> + nitems != 9 || bytes_after != 0)
> + {
> + fprintf(stderr, "Failed to retrieve current property values\n");
> + return EXIT_FAILURE;
> + }
> +
> + memcpy(data.f, m->m, sizeof(m->m));
> +
> + XIChangeProperty(dpy, deviceid, prop_matrix, prop_float,
> + format_return, PropModeReplace, data.c, nitems);
> +
> + XFree(data.c);
> +
> + return EXIT_SUCCESS;
> +}
> +
> +static void
> +set_transformation_matrix(Display *dpy, Matrix *m, int offset_x, int offset_y,
> + int screen_width, int screen_height)
> +{
> + /* offset */
> + int width = DisplayWidth(dpy, DefaultScreen(dpy));
> + int height = DisplayHeight(dpy, DefaultScreen(dpy));
> +
> + /* offset */
> + float x = 1.0 * offset_x/width;
> + float y = 1.0 * offset_y/height;
> +
> + /* mapping */
> + float w = 1.0 * screen_width/width;
> + float h = 1.0 * screen_height/height;
> +
> + matrix_set_unity(m);
> +
> + matrix_set(m, 0, 2, x);
> + matrix_set(m, 1, 2, y);
> +
> + matrix_set(m, 0, 0, w);
> + matrix_set(m, 1, 1, h);
> +
> +#if DEBUG
> + matrix_print(m);
> +#endif
> +}
> +
> +static int
> +map_crtc_xrandr(Display *dpy, int deviceid, const char *output_name)
> +{
> + int i, found = 0;
> + int rc = EXIT_FAILURE;
> + XRRScreenResources *res;
> + XRROutputInfo *output_info;
> + XRRCrtcInfo *crtc_info;
> +
> + res = XRRGetScreenResources(dpy, DefaultRootWindow(dpy));
> +
> + for (i = 0; i < res->noutput && !found; i++)
> + {
> + output_info = XRRGetOutputInfo(dpy, res, res->outputs[i]);
> + if (!output_info->crtc || output_info->connection != RR_Connected)
> + continue;
> +
> + crtc_info = XRRGetCrtcInfo (dpy, res, output_info->crtc);
> + if (strcmp(output_info->name, output_name) == 0)
> + {
> + found = 1;
> + break;
> + }
> + }
> +
> + /* crtc holds our screen info, need to compare to actual screen size */
> + if (found)
> + {
> + Matrix m;
> + matrix_set_unity(&m);
> + set_transformation_matrix(dpy, &m, crtc_info->x, crtc_info->y,
> + crtc_info->width, crtc_info->height);
> + rc = apply_matrix(dpy, deviceid, &m);
> + } else
> + printf("Unable to find output '%s'. "
> + "Output may not be connected.\n", output_name);
> +
> + XRRFreeScreenResources(res);
> +
> + return rc;
> +}
> +
> +static int
> +map_crtc_xinerama(Display *dpy, int deviceid, const char *output_name)
> +{
> + const char *prefix = "HEAD-";
> + XineramaScreenInfo *screens = NULL;
> + int rc = EXIT_FAILURE;
> + int event, error;
> + int nscreens;
> + int head;
> + Matrix m;
> +
> + if (!XineramaQueryExtension(dpy, &event, &error))
> + {
> + fprintf(stderr, "Unable to set screen mapping. Xinerama extension not found\n");
> + goto out;
> + }
> +
> + if (strlen(output_name) < strlen(prefix) + 1 ||
> + strncmp(output_name, prefix, strlen(prefix)) != 0)
> + {
> + fprintf(stderr, "Please specify the output name as HEAD-X,"
> + "where X is the screen number\n");
> + goto out;
> + }
> +
> + head = output_name[strlen(prefix)] - '0';
> +
> + screens = XineramaQueryScreens(dpy, &nscreens);
> +
> + if (nscreens == 0)
> + {
> + fprintf(stderr, "Xinerama failed to query screens.\n");
> + goto out;
> + } else if (nscreens <= head)
> + {
> + fprintf(stderr, "Found %d screens, but you requested %s.\n",
> + nscreens, output_name);
> + goto out;
> + }
> +
> + matrix_set_unity(&m);
> + set_transformation_matrix(dpy, &m,
> + screens[head].x_org, screens[head].y_org,
> + screens[head].width, screens[head].height);
> + rc = apply_matrix(dpy, deviceid, &m);
> +
> +out:
> + XFree(screens);
> + return rc;
> +}
> +
> +int
> +map_to_crtc(Display *dpy, int argc, char *argv[], char *name, char *desc)
> +{
> + int opcode, event, error;
> + int maj, min;
> + char *crtc_name;
> + XIDeviceInfo *info;
> +
> + if (argc < 2)
> + {
> + fprintf(stderr, "Usage: xinput %s %s\n", name, desc);
> + return EXIT_FAILURE;
> + }
> +
> + info = xi2_find_device_info(dpy, argv[0]);
> + if (!info)
> + {
> + fprintf(stderr, "unable to find device %s\n", argv[0]);
> + return EXIT_FAILURE;
> + }
> +
> + crtc_name = argv[1];
> +
> + /* Check for RandR 1.2. Server bug causes the NVIDIA driver to
> + * report with RandR 1.3 support but it doesn't expose RandR CRTCs.
> + * Force Xinerama if NV-CONTROL is present */
> + if (XQueryExtension(dpy, "NV-CONTROL", &opcode, &event, &error) ||
> + !XQueryExtension(dpy, "RANDR", &opcode, &event, &error) ||
> + !XRRQueryVersion(dpy, &maj, &min) || (maj * 1000 + min) < 1002)
> + return map_crtc_xinerama(dpy, info->deviceid, crtc_name);
> + else
> + return map_crtc_xrandr(dpy, info->deviceid, crtc_name);
> +}
> diff --git a/src/xinput.c b/src/xinput.c
> index 64b4887..432cffc 100644
> --- a/src/xinput.c
> +++ b/src/xinput.c
> @@ -104,6 +104,10 @@ static entry drivers[] =
> "<device>",
> test_xi2,
> },
> + { "map-to-crtc",
> + "<device> <crtc name>",
> + map_to_crtc,
> + },
> #endif
> { "list-props",
> "<device> [<device> ...]",
> diff --git a/src/xinput.h b/src/xinput.h
> index d44ce09..94b8f3c 100644
> --- a/src/xinput.h
> +++ b/src/xinput.h
> @@ -77,5 +77,6 @@ int change_attachment( Display* display, int argc, char *argv[], char *prog_name
> int float_device( Display* display, int argc, char *argv[], char *prog_name, char *prog_desc);
> int set_clientpointer( Display* display, int argc, char *argv[], char *prog_name, char *prog_desc);
> int test_xi2( Display* display, int argc, char *argv[], char *prog_name, char *prog_desc);
> +int map_to_crtc( Display* display, int argc, char *argv[], char *prog_name, char *prog_desc);
>
> /* end of xinput.h */
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