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reverting to software retrace-sync for cursor position updates on pre-GeForce cards: it turns out there's no hardware sync here after all.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11299 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen
2005-02-09 18:08:03 +00:00
parent 942d411b67
commit 3f17567e63
1 changed files with 39 additions and 5 deletions
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src/add-ons/accelerants/nvidia/engine/nv_crtc.c
+39 -5
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@@ -1,6 +1,6 @@
/* CTRC functionality */
/* Author:
Rudolf Cornelissen 11/2002-1/2005
Rudolf Cornelissen 11/2002-2/2005
*/
#define MODULE_BIT 0x00040000
@@ -701,9 +701,8 @@ status_t nv_crtc_cursor_init()
/* select 32x32 pixel, 16bit color cursorbitmap, no doublescan */
NV_REG32(NV32_CURCONF) = 0x02000100;
/* activate hardware-sync between cursor updates and vertical retrace */
/* note:
* on pre-NV10 cards hardware sync is hardwired ON */
/* activate hardware-sync between cursor updates and vertical retrace where
* available */
if (si->ps.card_arch >= NV10A)
DACW(NV10_CURSYNC, (DACR(NV10_CURSYNC) | 0x02000000));
@@ -806,7 +805,42 @@ status_t nv_crtc_cursor_define(uint8* andMask,uint8* xorMask)
/* position the cursor */
status_t nv_crtc_cursor_position(uint16 x, uint16 y)
{
/* the cursor position is updated during retrace by card hardware */
/* the cursor position is updated during retrace by card hardware except for
* pre-GeForce cards */
if (si->ps.card_arch < NV10A)
{
uint16 yhigh;
/* make sure we are beyond the first line of the cursorbitmap being drawn during
* updating the position to prevent distortions: no double buffering feature */
/* Note:
* we need to return as quick as possible or some apps will exhibit lagging.. */
/* read the old cursor Y position */
yhigh = ((DACR(CURPOS) & 0x0fff0000) >> 16);
/* make sure we will wait until we are below both the old and new Y position:
* visible cursorbitmap drawing needs to be done at least... */
if (y > yhigh) yhigh = y;
if (yhigh < (si->dm.timing.v_display - 16))
{
/* we have vertical lines below old and new cursorposition to spare. So we
* update the cursor postion 'mid-screen', but below that area. */
while (((uint16)(NV_REG32(NV32_RASTER) & 0x000007ff)) < (yhigh + 16))
{
snooze(10);
}
}
else
{
/* no room to spare, just wait for retrace (is relatively slow) */
while ((NV_REG32(NV32_RASTER) & 0x000007ff) < si->dm.timing.v_display)
{
/* don't snooze much longer or retrace might get missed! */
snooze(10);
}
}
}
/* update cursorposition */
DACW(CURPOS, ((x & 0x0fff) | ((y & 0x0fff) << 16)));