/*
* ATIDGASetViewport --
*
* This function sets the display start address for a DGA client.
*/
static void
ATIDGASetViewport
(
ScrnInfoPtr pScreenInfo,
int x,
int y,
int flags
)
{
(*pScreenInfo->AdjustFrame)(ADJUST_FRAME_ARGS(pScreenInfo, x, y));
}
/*
* ATIDGASetMode --
*
* This function sets a graphics mode for a DGA client.
*/
static Bool
ATIDGASetMode
(
ScrnInfoPtr pScreenInfo,
DGAModePtr pDGAMode
)
{
ATIPtr pATI = ATIPTR(pScreenInfo);
DisplayModePtr pMode;
int frameX0, frameY0;
if (pDGAMode)
{
pMode = pDGAMode->mode;
pATI->depth = pDGAMode->depth;
pATI->bitsPerPixel = pDGAMode->bitsPerPixel;
pATI->displayWidth =
pDGAMode->bytesPerScanline * 8 / pATI->bitsPerPixel;
pATI->weight.red = BitsSet(pDGAMode->red_mask);
pATI->weight.green = BitsSet(pDGAMode->green_mask);
pATI->weight.blue = BitsSet(pDGAMode->blue_mask);
frameX0 = frameY0 = 0;
if (!pATI->currentMode)
pATI->currentMode = pScreenInfo->currentMode;
}
else
{
if (!(pMode = pATI->currentMode))
return TRUE;
pATI->depth = pScreenInfo->depth;
pATI->bitsPerPixel = pScreenInfo->bitsPerPixel;
pATI->displayWidth = pScreenInfo->displayWidth;
pATI->weight = pScreenInfo->weight;
frameX0 = pScreenInfo->frameX0;
frameY0 = pScreenInfo->frameY0;
}
pATI->XModifier = pATI->bitsPerPixel / UnitOf(pATI->bitsPerPixel);
ATIAdjustPreInit(pATI);
ATIModePreInit(pScreenInfo, pATI, &pATI->NewHW);
if (!(*pScreenInfo->SwitchMode)(SWITCH_MODE_ARGS(pScreenInfo, pMode)))
return FALSE;
if (!pDGAMode)
pATI->currentMode = NULL;
(*pScreenInfo->AdjustFrame)(ADJUST_FRAME_ARGS(pScreenInfo, frameX0, frameY0));
return TRUE;
}
static void
I810_SetViewport(ScrnInfoPtr pScrn, int x, int y, int flags)
{
I810Ptr pI810 = I810PTR(pScrn);
vgaHWPtr hwp = VGAHWPTR(pScrn);
pScrn->AdjustFrame(ADJUST_FRAME_ARGS(pScrn, x, y));
/* wait for retrace */
while ((hwp->readST01(hwp) & 0x08)) ;
while (!(hwp->readST01(hwp) & 0x08)) ;
pI810->DGAViewportStatus = 0;
}
static Bool
I810_SetMode(ScrnInfoPtr pScrn, DGAModePtr pMode)
{
int index = pScrn->pScreen->myNum;
I810Ptr pI810 = I810PTR(pScrn);
if (!pMode) { /* restore the original mode */
if (pI810->DGAactive) {
pScrn->currentMode = I810SavedDGAModes[index];
pScrn->SwitchMode(SWITCH_MODE_ARGS(pScrn, pScrn->currentMode));
pScrn->AdjustFrame(ADJUST_FRAME_ARGS(pScrn, 0, 0));
pI810->DGAactive = FALSE;
}
} else {
if (!pI810->DGAactive) {
I810SavedDGAModes[index] = pScrn->currentMode;
pI810->DGAactive = TRUE;
}
pScrn->SwitchMode(SWITCH_MODE_ARGS(pScrn, pMode->mode));
}
return TRUE;
}
