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Remove save/restore of the crtc and gdc registers when showing and

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hiding the mouse cursor.  The showing and hiding is often done
asynchronously in a not very safe signal handler, but the state of
these registers and much more is protected from the signal handler
in a better way by deferring mouse signals while the state is in use.
This commit is contained in:
Bruce Evans 2019-04-26 14:44:20 +00:00
parent ea0a990509
commit d05368940d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=346747
1 changed files with 0 additions and 27 deletions
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27
lib/libvgl/mouse.c
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@ -108,18 +108,11 @@ VGLMousePointerShow()
byte buf[MOUSE_IMG_SIZE*MOUSE_IMG_SIZE*4];
VGLBitmap buffer =
VGLBITMAP_INITIALIZER(MEMBUF, MOUSE_IMG_SIZE, MOUSE_IMG_SIZE, buf);
byte crtcidx, crtcval, gdcidx, gdcval;
int pos;
if (!VGLMouseVisible) {
INTOFF();
VGLMouseVisible = 1;
if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT) {
crtcidx = inb(0x3c4);
crtcval = inb(0x3c5);
gdcidx = inb(0x3ce);
gdcval = inb(0x3cf);
}
buffer.PixelBytes = VGLDisplay->PixelBytes;
__VGLBitmapCopy(&VGLVDisplay, VGLMouseXpos, VGLMouseYpos,
&buffer, 0, 0, MOUSE_IMG_SIZE, MOUSE_IMG_SIZE);
@ -130,12 +123,6 @@ VGLMousePointerShow()
VGLDisplay->PixelBytes);
__VGLBitmapCopy(&buffer, 0, 0, VGLDisplay,
VGLMouseXpos, VGLMouseYpos, MOUSE_IMG_SIZE, MOUSE_IMG_SIZE);
if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT) {
outb(0x3c4, crtcidx);
outb(0x3c5, crtcval);
outb(0x3ce, gdcidx);
outb(0x3cf, gdcval);
}
INTON();
}
}
@ -143,25 +130,11 @@ VGLMousePointerShow()
void
VGLMousePointerHide()
{
byte crtcidx, crtcval, gdcidx, gdcval;
if (VGLMouseVisible) {
INTOFF();
VGLMouseVisible = 0;
if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT) {
crtcidx = inb(0x3c4);
crtcval = inb(0x3c5);
gdcidx = inb(0x3ce);
gdcval = inb(0x3cf);
}
__VGLBitmapCopy(&VGLVDisplay, VGLMouseXpos, VGLMouseYpos, VGLDisplay,
VGLMouseXpos, VGLMouseYpos, MOUSE_IMG_SIZE, MOUSE_IMG_SIZE);
if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT) {
outb(0x3c4, crtcidx);
outb(0x3c5, crtcval);
outb(0x3ce, gdcidx);
outb(0x3cf, gdcval);
}
INTON();
}
}