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Code Issues Releases Wiki Activity

Enhanced mouse cursor capture on FreeBSD

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This commit is contained in:
Bryan Roe
2019-09-20 23:35:18 -07:00
parent 648b0455ac
commit f551de1925
1 changed files with 45 additions and 2 deletions
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47
meshcore/KVM/Linux/linux_kvm.c
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@@ -34,7 +34,7 @@ limitations under the License.
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
extern uint32_t crc32c(uint32_t crc, const unsigned char* buf, uint32_t len);
typedef enum KVM_MouseCursors
{
@@ -126,6 +126,7 @@ typedef struct xfixes_struct
void *xfixes_lib;
Bool(*XFixesSelectCursorInput)(Display *d, Window w, int i);
Bool(*XFixesQueryExtension)(Display *d, int *eventbase, int *errorbase);
void*(*XFixesGetCursorImage)(Display *d);
}xfixes_struct;
xfixes_struct *xfixes_exports = NULL;
@@ -371,6 +372,7 @@ int kvm_init(int displayNo)
{
((void**)xfixes_exports)[1] = (void*)dlsym(xfixes_exports->xfixes_lib, "XFixesSelectCursorInput");
((void**)xfixes_exports)[2] = (void*)dlsym(xfixes_exports->xfixes_lib, "XFixesQueryExtension");
((void**)xfixes_exports)[3] = (void*)dlsym(xfixes_exports->xfixes_lib, "XFixesGetCursorImage");
}
}
@@ -737,9 +739,50 @@ void* kvm_server_mainloop(void* parm)
if (strcmp(name, "top_side") == 0) { curcursor = KVM_MouseCursor_SIZENS; }
if (strcmp(name, "watch") == 0) { curcursor = KVM_MouseCursor_WAIT; }
if (strcmp(name, "top_side") == 0) { curcursor = KVM_MouseCursor_SIZENS; }
if (strcmp(name, "xterm") == 0 || strcmp(name, "ibeam") == 0) { curcursor = KVM_MouseCursor_IBEAM; }
if (strcmp(name, "xterm") == 0 || strcmp(name, "ibeam") == 0 || strcmp(name, "text") == 0) { curcursor = KVM_MouseCursor_IBEAM; }
x11_exports->XFree(name);
}
else
{
// Name was NULL, so as a last ditch effort, lets try to look at the XFixesCursorImage
char *cursor_image = (char*)xfixes_exports->XFixesGetCursorImage(cursordisplay);
if (sizeof(void*) == 8)
{
unsigned short w = ((unsigned short*)(cursor_image + 4))[0];
unsigned short h = ((unsigned short*)(cursor_image + 6))[0];
char *pixels = cursor_image + 24;
char alpha[1024];
int i;
for (i = 0; i < (w*h); ++i)
{
alpha[i] = pixels[7 + (i * 8)];
}
switch (crc32c(0, (unsigned char*)alpha, (uint32_t)(w*h)))
{
case 680869104:
curcursor = KVM_MouseCursor_SIZENS;
break;
case 1094213267:
curcursor = KVM_MouseCursor_SIZEWE;
break;
case 318345513:
case 69513426:
curcursor = KVM_MouseCursor_SIZENESW;
break;
case (uint32_t)-1187377452:
case (uint32_t)-600127498:
curcursor = KVM_MouseCursor_SIZENWSE;
break;
case 733076101:
curcursor = KVM_MouseCursor_SIZEALL;
break;
case 728953462:
curcursor = KVM_MouseCursor_ARROW:
break;
}
}
}
((unsigned short*)buffer)[0] = (unsigned short)htons((unsigned short)MNG_KVM_MOUSE_CURSOR); // Write the type
((unsigned short*)buffer)[1] = (unsigned short)htons((unsigned short)5); // Write the size