mirror of
https://github.com/Ryujinx/SDL.git
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0e45984fa0
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
269 lines
8.2 KiB
C
269 lines
8.2 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_X11
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#include "SDL_x11video.h"
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#include "SDL_x11xinput2.h"
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#include "../../events/SDL_mouse_c.h"
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#include "../../events/SDL_touch_c.h"
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#define MAX_AXIS 16
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#if SDL_VIDEO_DRIVER_X11_XINPUT2
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static int xinput2_initialized = 0;
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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static int xinput2_multitouch_supported = 0;
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#endif
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/* Opcode returned X11_XQueryExtension
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* It will be used in event processing
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* to know that the event came from
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* this extension */
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static int xinput2_opcode;
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static void parse_valuators(const double *input_values,unsigned char *mask,int mask_len,
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double *output_values,int output_values_len) {
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int i = 0,z = 0;
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int top = mask_len * 8;
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if (top > MAX_AXIS)
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top = MAX_AXIS;
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SDL_memset(output_values,0,output_values_len * sizeof(double));
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for (; i < top && z < output_values_len; i++) {
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if (XIMaskIsSet(mask, i)) {
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const int value = (int) *input_values;
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output_values[z] = value;
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input_values++;
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}
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z++;
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}
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}
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static int
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query_xinput2_version(Display *display, int major, int minor)
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{
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/* We don't care if this fails, so long as it sets major/minor on it's way out the door. */
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X11_XIQueryVersion(display, &major, &minor);
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return ((major * 1000) + minor);
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}
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static SDL_bool
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xinput2_version_atleast(const int version, const int wantmajor, const int wantminor)
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{
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return ( version >= ((wantmajor * 1000) + wantminor) );
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}
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#endif /* SDL_VIDEO_DRIVER_X11_XINPUT2 */
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void
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X11_InitXinput2(_THIS)
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{
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#if SDL_VIDEO_DRIVER_X11_XINPUT2
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SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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int version = 0;
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XIEventMask eventmask;
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unsigned char mask[3] = { 0,0,0 };
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int event, err;
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/*
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* Initialize XInput 2
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* According to http://who-t.blogspot.com/2009/05/xi2-recipes-part-1.html its better
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* to inform Xserver what version of Xinput we support.The server will store the version we support.
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* "As XI2 progresses it becomes important that you use this call as the server may treat the client
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* differently depending on the supported version".
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*
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* FIXME:event and err are not needed but if not passed X11_XQueryExtension returns SegmentationFault
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*/
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if (!SDL_X11_HAVE_XINPUT2 ||
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!X11_XQueryExtension(data->display, "XInputExtension", &xinput2_opcode, &event, &err)) {
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return; /* X server does not have XInput at all */
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}
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/* We need at least 2.2 for Multitouch, 2.0 otherwise. */
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version = query_xinput2_version(data->display, 2, 2);
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if (!xinput2_version_atleast(version, 2, 0)) {
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return; /* X server does not support the version we want at all. */
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}
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xinput2_initialized = 1;
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH /* Multitouch needs XInput 2.2 */
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xinput2_multitouch_supported = xinput2_version_atleast(version, 2, 2);
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#endif
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/* Enable Raw motion events for this display */
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eventmask.deviceid = XIAllMasterDevices;
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eventmask.mask_len = sizeof(mask);
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eventmask.mask = mask;
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XISetMask(mask, XI_RawMotion);
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if (X11_XISelectEvents(data->display,DefaultRootWindow(data->display),&eventmask,1) != Success) {
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return;
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}
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#endif
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}
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int
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X11_HandleXinput2Event(SDL_VideoData *videodata,XGenericEventCookie *cookie)
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{
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#if SDL_VIDEO_DRIVER_X11_XINPUT2
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if(cookie->extension != xinput2_opcode) {
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return 0;
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}
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switch(cookie->evtype) {
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case XI_RawMotion: {
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const XIRawEvent *rawev = (const XIRawEvent*)cookie->data;
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SDL_Mouse *mouse = SDL_GetMouse();
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double relative_coords[2];
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static Time prev_time = 0;
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static double prev_rel_coords[2];
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if (!mouse->relative_mode || mouse->relative_mode_warp) {
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return 0;
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}
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parse_valuators(rawev->raw_values,rawev->valuators.mask,
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rawev->valuators.mask_len,relative_coords,2);
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if ((rawev->time == prev_time) && (relative_coords[0] == prev_rel_coords[0]) && (relative_coords[1] == prev_rel_coords[1])) {
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return 0; /* duplicate event, drop it. */
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}
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SDL_SendMouseMotion(mouse->focus,mouse->mouseID,1,(int)relative_coords[0],(int)relative_coords[1]);
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prev_rel_coords[0] = relative_coords[0];
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prev_rel_coords[1] = relative_coords[1];
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prev_time = rawev->time;
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return 1;
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}
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break;
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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case XI_TouchBegin: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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SDL_SendTouch(xev->sourceid,xev->detail,
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SDL_TRUE, xev->event_x, xev->event_y, 1.0);
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return 1;
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}
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break;
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case XI_TouchEnd: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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SDL_SendTouch(xev->sourceid,xev->detail,
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SDL_FALSE, xev->event_x, xev->event_y, 1.0);
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return 1;
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}
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break;
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case XI_TouchUpdate: {
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const XIDeviceEvent *xev = (const XIDeviceEvent *) cookie->data;
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SDL_SendTouchMotion(xev->sourceid,xev->detail,
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xev->event_x, xev->event_y, 1.0);
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return 1;
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}
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break;
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#endif
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}
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#endif
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return 0;
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}
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void
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X11_InitXinput2Multitouch(_THIS)
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{
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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XIDeviceInfo *info;
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int ndevices,i,j;
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info = X11_XIQueryDevice(data->display, XIAllDevices, &ndevices);
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for (i = 0; i < ndevices; i++) {
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XIDeviceInfo *dev = &info[i];
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for (j = 0; j < dev->num_classes; j++) {
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SDL_TouchID touchId;
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XIAnyClassInfo *class = dev->classes[j];
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XITouchClassInfo *t = (XITouchClassInfo*)class;
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/* Only touch devices */
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if (class->type != XITouchClass)
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continue;
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touchId = t->sourceid;
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SDL_AddTouch(touchId, dev->name);
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}
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}
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X11_XIFreeDeviceInfo(info);
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#endif
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}
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void
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X11_Xinput2SelectTouch(_THIS, SDL_Window *window)
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{
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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SDL_VideoData *data = NULL;
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XIEventMask eventmask;
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unsigned char mask[3] = { 0,0,0 };
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SDL_WindowData *window_data = NULL;
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if (!X11_Xinput2IsMultitouchSupported()) {
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return;
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}
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data = (SDL_VideoData *) _this->driverdata;
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window_data = (SDL_WindowData*)window->driverdata;
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eventmask.deviceid = XIAllMasterDevices;
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eventmask.mask_len = sizeof(mask);
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eventmask.mask = mask;
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XISetMask(mask, XI_TouchBegin);
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XISetMask(mask, XI_TouchUpdate);
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XISetMask(mask, XI_TouchEnd);
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X11_XISelectEvents(data->display,window_data->xwindow,&eventmask,1);
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#endif
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}
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int
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X11_Xinput2IsInitialized()
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{
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#if SDL_VIDEO_DRIVER_X11_XINPUT2
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return xinput2_initialized;
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#else
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return 0;
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#endif
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}
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int
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X11_Xinput2IsMultitouchSupported()
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{
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#if SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH
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return xinput2_initialized && xinput2_multitouch_supported;
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#else
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return 0;
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#endif
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}
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#endif /* SDL_VIDEO_DRIVER_X11 */
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/* vi: set ts=4 sw=4 expandtab: */
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