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- /* Copyright 2018 Peter Astrand <astrand@cendio.se> for Cendio AB
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #ifdef HAVE_XRANDR
- #include <X11/Xlib.h>
- #include <X11/extensions/Xrandr.h>
- #include <stdlib.h>
- #include <string.h>
-
- #include "RandrGlue.h"
-
- typedef struct _vncGlueContext {
- Display *dpy;
- XRRScreenResources *res;
- } vncGlueContext;
-
- static vncGlueContext randrGlueContext;
-
- void vncSetGlueContext(Display *dpy, void *res)
- {
- randrGlueContext.dpy = dpy;
- randrGlueContext.res = (XRRScreenResources *)res;
- }
-
- static RRMode vncRandRGetMatchingMode(XRROutputInfo *output,
- unsigned int width, unsigned int height)
- {
- vncGlueContext *ctx = &randrGlueContext;
-
- /*
- * We're not going to change which modes are preferred, but let's
- * see if we can at least find a mode with matching dimensions.
- */
-
- if (output->crtc) {
- XRRCrtcInfo *crtc;
- unsigned int swap;
-
- crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtc);
- if (!crtc)
- return None;
-
- switch (crtc->rotation) {
- case RR_Rotate_90:
- case RR_Rotate_270:
- swap = width;
- width = height;
- height = swap;
- break;
- }
-
- XRRFreeCrtcInfo(crtc);
- }
-
- for (int i = 0; i < ctx->res->nmode; i++) {
- for (int j = 0; j < output->nmode; j++) {
- if ((output->modes[j] == ctx->res->modes[i].id) &&
- (ctx->res->modes[i].width == width) &&
- (ctx->res->modes[i].height == height)) {
- return ctx->res->modes[i].id;
- }
- }
- }
-
- return None;
- }
-
- int vncGetScreenWidth(void)
- {
- vncGlueContext *ctx = &randrGlueContext;
- return DisplayWidth(ctx->dpy, DefaultScreen(ctx->dpy));
- }
-
- int vncGetScreenHeight(void)
- {
- vncGlueContext *ctx = &randrGlueContext;
- return DisplayHeight(ctx->dpy, DefaultScreen(ctx->dpy));
- }
-
- int vncRandRIsValidScreenSize(int width, int height)
- {
- vncGlueContext *ctx = &randrGlueContext;
- /* Assert size ranges */
- int minwidth, minheight, maxwidth, maxheight;
- int ret = XRRGetScreenSizeRange(ctx->dpy, DefaultRootWindow(ctx->dpy),
- &minwidth, &minheight,
- &maxwidth, &maxheight);
- if (!ret) {
- return 0;
- }
- if (width < minwidth || maxwidth < width) {
- return 0;
- }
- if (height < minheight || maxheight < height) {
- return 0;
- }
-
- return 1;
- }
-
- int vncRandRResizeScreen(int width, int height)
- {
- vncGlueContext *ctx = &randrGlueContext;
-
- int mwidth, mheight;
-
- // Always calculate a DPI of 96.
- // It's what mutter does, so good enough for us.
- mwidth = width * 254 / 96 / 10;
- mheight = height * 254 / 96 / 10;
-
- XRRSetScreenSize(ctx->dpy, DefaultRootWindow(ctx->dpy),
- width, height, mwidth, mheight);
-
- return 1;
- }
-
- void vncRandRUpdateSetTime(void)
- {
-
- }
-
- int vncRandRHasOutputClones(void)
- {
- vncGlueContext *ctx = &randrGlueContext;
- for (int i = 0; i < ctx->res->ncrtc; i++) {
- XRRCrtcInfo *crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, ctx->res->crtcs[i]);
- if (!crtc) {
- return 0;
- }
- if (crtc->noutput > 1) {
- XRRFreeCrtcInfo (crtc);
- return 1;
- }
- XRRFreeCrtcInfo (crtc);
- }
- return 0;
- }
-
- int vncRandRGetOutputCount(void)
- {
- vncGlueContext *ctx = &randrGlueContext;
- return ctx->res->noutput;
- }
-
- int vncRandRGetAvailableOutputs(void)
- {
- vncGlueContext *ctx = &randrGlueContext;
-
- int availableOutputs;
- RRCrtc *usedCrtcs;
- int numUsed;
-
- int i, j, k;
-
- usedCrtcs = (RRCrtc*)malloc(sizeof(RRCrtc) * ctx->res->ncrtc);
- if (usedCrtcs == NULL)
- return 0;
-
- /*
- * This gets slightly complicated because we might need to hook a CRTC
- * up to the output, but also check that we don't try to use the same
- * CRTC for multiple outputs.
- */
- availableOutputs = 0;
- numUsed = 0;
- for (i = 0;i < ctx->res->noutput; i++) {
- XRROutputInfo *output;
-
- output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[i]);
- if (!output) {
- continue;
- }
-
- if (output->crtc != None)
- availableOutputs++;
- else {
- for (j = 0;j < output->ncrtc;j++) {
- XRRCrtcInfo *crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtcs[j]);
- if (!crtc) {
- continue;
- }
- if (crtc->noutput != 0) {
- XRRFreeCrtcInfo(crtc);
- continue;
- }
- XRRFreeCrtcInfo(crtc);
-
- for (k = 0;k < numUsed;k++) {
- if (usedCrtcs[k] == output->crtcs[j])
- break;
- }
- if (k != numUsed)
- continue;
-
- availableOutputs++;
-
- usedCrtcs[numUsed] = output->crtcs[j];
- numUsed++;
-
- break;
- }
- }
- XRRFreeOutputInfo(output);
- }
-
- free(usedCrtcs);
-
- return availableOutputs;
- }
-
- char *vncRandRGetOutputName(int outputIdx)
- {
- vncGlueContext *ctx = &randrGlueContext;
- XRROutputInfo *output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return strdup("");
- }
- char *ret = strdup(output->name);
- XRRFreeOutputInfo(output);
- return ret;
- }
-
- int vncRandRIsOutputEnabled(int outputIdx)
- {
- vncGlueContext *ctx = &randrGlueContext;
- XRROutputInfo *output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return 0;
- }
-
- if (output->crtc == None) {
- XRRFreeOutputInfo(output);
- return 0;
- }
- XRRCrtcInfo *crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtc);
- XRRFreeOutputInfo(output);
- if (!crtc) {
- return 0;
- }
- if (crtc->mode == None) {
- XRRFreeCrtcInfo(crtc);
- return 0;
- }
- XRRFreeCrtcInfo(crtc);
- return 1;
- }
-
- int vncRandRIsOutputUsable(int outputIdx)
- {
- vncGlueContext *ctx = &randrGlueContext;
-
- XRROutputInfo *output;
- int i;
-
- output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return 0;
- }
-
- if (output->crtc != None) {
- XRRFreeOutputInfo(output);
- return 1;
- }
-
- /* Any unused CRTCs? */
- for (i = 0;i < output->ncrtc;i++) {
- XRRCrtcInfo *crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtcs[i]);
- if (crtc->noutput == 0) {
- XRRFreeOutputInfo(output);
- XRRFreeCrtcInfo(crtc);
- return 1;
- }
- XRRFreeCrtcInfo(crtc);
- }
-
- XRRFreeOutputInfo(output);
- return 0;
- }
-
- int vncRandRIsOutputConnected(int outputIdx)
- {
- vncGlueContext *ctx = &randrGlueContext;
- XRROutputInfo *output;
-
- output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return 0;
- }
-
- int ret = (output->connection == RR_Connected);
- XRRFreeOutputInfo(output);
- return ret;
- }
-
- int vncRandRCheckOutputMode(int outputIdx, int width, int height)
- {
- vncGlueContext *ctx = &randrGlueContext;
- XRROutputInfo *output;
- RRMode mode;
-
- output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output)
- return 0;
-
- /* Make sure we have the mode we want */
- mode = vncRandRGetMatchingMode(output, width, height);
- XRRFreeOutputInfo(output);
-
- if (mode == None)
- return 0;
-
- return 1;
- }
-
- int vncRandRDisableOutput(int outputIdx)
- {
- vncGlueContext *ctx = &randrGlueContext;
- RRCrtc crtcid;
- int i;
- int move = 0;
-
- XRROutputInfo *output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return 0;
- }
-
- crtcid = output->crtc;
- if (crtcid == 0) {
- XRRFreeOutputInfo(output);
- return 1;
- }
-
- XRRCrtcInfo *crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtc);
- XRRFreeOutputInfo(output);
- if (!crtc) {
- return 0;
- }
-
- /* Remove this output from the CRTC configuration */
- for (i = 0; i < crtc->noutput; i++) {
- if (ctx->res->outputs[outputIdx] == crtc->outputs[i]) {
- crtc->noutput -= 1;
- move = 1;
- }
- if (move && i < crtc->noutput) {
- crtc->outputs[i] = crtc->outputs[i+1];
- }
- }
- if (crtc->noutput == 0) {
- crtc->mode = None;
- crtc->outputs = NULL;
- }
-
- int ret = XRRSetCrtcConfig(ctx->dpy,
- ctx->res,
- crtcid,
- CurrentTime,
- crtc->x, crtc->y,
- crtc->mode, crtc->rotation,
- crtc->outputs, crtc->noutput);
-
- XRRFreeCrtcInfo(crtc);
-
- return (ret == RRSetConfigSuccess);
- }
-
- unsigned int vncRandRGetOutputId(int outputIdx)
- {
- vncGlueContext *ctx = &randrGlueContext;
- return ctx->res->outputs[outputIdx];
- }
-
- int vncRandRGetOutputDimensions(int outputIdx,
- int *x, int *y, int *width, int *height)
- {
- vncGlueContext *ctx = &randrGlueContext;
- int swap;
- *x = *y = *width = *height = 0;
-
- XRROutputInfo *output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return 1;
- }
-
- if (!output->crtc) {
- XRRFreeOutputInfo(output);
- return 1;
- }
-
- XRRCrtcInfo *crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtc);
- XRRFreeOutputInfo(output);
- if (!crtc) {
- return 1;
- }
- if (crtc->mode == None) {
- XRRFreeCrtcInfo(crtc);
- return 1;
- }
-
- *x = crtc->x;
- *y = crtc->y;
- for (int m = 0; m < ctx->res->nmode; m++) {
- if (crtc->mode == ctx->res->modes[m].id) {
- *width = ctx->res->modes[m].width;
- *height = ctx->res->modes[m].height;
- }
- }
-
- switch (crtc->rotation) {
- case RR_Rotate_90:
- case RR_Rotate_270:
- swap = *width;
- *width = *height;
- *height = swap;
- break;
- }
-
- XRRFreeCrtcInfo(crtc);
- return 0;
- }
-
- int vncRandRReconfigureOutput(int outputIdx, int x, int y,
- int width, int height)
- {
- vncGlueContext *ctx = &randrGlueContext;
-
- XRROutputInfo *output;
- RRCrtc crtcid;
- RRMode mode;
- XRRCrtcInfo *crtc = NULL;
-
- int i, ret;
-
- output = XRRGetOutputInfo(ctx->dpy, ctx->res, ctx->res->outputs[outputIdx]);
- if (!output) {
- return 0;
- }
-
- crtcid = output->crtc;
-
- /* Need a CRTC? */
- if (crtcid == None) {
- for (i = 0;i < output->ncrtc;i++) {
- crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, output->crtcs[i]);
- if (!crtc) {
- continue;
- }
-
- if (crtc->noutput != 0) {
- XRRFreeCrtcInfo(crtc);
- continue;
- }
-
- crtcid = output->crtcs[i];
- crtc->rotation = RR_Rotate_0;
- break;
- }
- } else {
- crtc = XRRGetCrtcInfo(ctx->dpy, ctx->res, crtcid);
- }
-
- /* Couldn't find one... */
- if (crtc == NULL) {
- XRRFreeOutputInfo(output);
- return 0;
- }
-
- /* Make sure we have the mode we want */
- mode = vncRandRGetMatchingMode(output, width, height);
- if (mode == None) {
- XRRFreeCrtcInfo(crtc);
- XRRFreeOutputInfo(output);
- return 0;
- }
-
- /* Reconfigure new mode and position */
- ret = XRRSetCrtcConfig (ctx->dpy, ctx->res, crtcid, CurrentTime, x, y,
- mode, crtc->rotation, ctx->res->outputs+outputIdx, 1);
-
- XRRFreeCrtcInfo(crtc);
- XRRFreeOutputInfo(output);
-
- return (ret == RRSetConfigSuccess);
- }
-
- int vncRandRCanCreateOutputs(int extraOutputs)
- {
- (void)extraOutputs;
- return 0;
- }
-
- int vncRandRCreateOutputs(int extraOutputs)
- {
- (void)extraOutputs;
- return 0;
- }
-
- #endif /* HAVE_XRANDR */
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