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/*
* Acceleration for the Creator and Creator3D framebuffer - clip setting.
*
* Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* JAKUB JELINEK OR DAVID MILLER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* $XFree86$ */
#include "ffb.h"
#include "ffb_regs.h"
#include "ffb_rcache.h"
#include "ffb_fifo.h"
#include "ffb_clip.h"
unsigned int
FFBSetClip(FFBPtr pFfb, ffb_fbcPtr ffb, RegionPtr pClip, int numRects)
{
unsigned int xy1, xy2;
if (numRects == 1) {
xy1 = (pClip->extents.y1 << 16) | pClip->extents.x1;
xy2 = ((pClip->extents.y2 - 1) << 16) | (pClip->extents.x2 - 1);
if (pFfb->clips[0] == xy1 && pFfb->clips[1] == xy2)
return FFB_PPC_VCE_2D|FFB_PPC_ACE_DISABLE;
FFBFifo(pFfb, 2);
FFB_WRITE64(&ffb->vclipmin, xy1, xy2);
pFfb->clips[0] = xy1;
pFfb->clips[1] = xy2;
return FFB_PPC_VCE_2D|FFB_PPC_ACE_DISABLE;
} else if (numRects <= 5) {
ffb_auxclipPtr auxclip;
BoxPtr pBox = REGION_RECTS(pClip);
int i, j;
unsigned int xy3, xy4;
xy1 = (pBox->y1 << 16) | pBox->x1;
xy2 = ((pBox->y2 - 1) << 16) | (pBox->x2 - 1);
if (pFfb->clips[0] == xy1 && pFfb->clips[1] == xy2) {
j = 0;
for (i = 1; i < numRects; i++) {
xy3 = (pBox[i].y1 << 16) | pBox[i].x1;
xy4 = ((pBox[i].y2 - 1) << 16) | (pBox[i].x2 - 1);
if (j || xy3 != pFfb->clips[2*i] || xy4 != pFfb->clips[2*i+1]) {
j = 1;
pFfb->clips[2*i] = xy3;
pFfb->clips[2*i+1] = xy4;
}
}
for (; i < 5; i++) {
if (j || pFfb->clips[2*i] != 1 || pFfb->clips[2*i+1]) {
j = 1;
pFfb->clips[2*i] = 1;
pFfb->clips[2*i+1] = 0;
}
}
if (!j)
return FFB_PPC_VCE_2D|FFB_PPC_ACE_AUX_ADD;
FFBFifo(pFfb, 8);
auxclip = ffb->auxclip;
for (i = 1; i < 5; i++, auxclip++)
FFB_WRITE64P(&auxclip->min, &pFfb->clips[2*i]);
return FFB_PPC_VCE_2D|FFB_PPC_ACE_AUX_ADD;
}
FFBFifo(pFfb, 10);
FFB_WRITE64(&ffb->vclipmin, xy1, xy2);
pFfb->clips[0] = xy1;
pFfb->clips[1] = xy2;
auxclip = ffb->auxclip;
pBox++;
for (i = 1; i < numRects; i++, auxclip++, pBox++) {
xy3 = (pBox->y1 << 16) | pBox->x1;
xy4 = ((pBox->y2 - 1) << 16) | (pBox->x2 - 1);
FFB_WRITE64(&auxclip->min, xy3, xy4);
pFfb->clips[2*i] = xy3;
pFfb->clips[2*i+1] = xy4;
}
for (; i < 5; i++, auxclip++) {
FFB_WRITE64(&auxclip->min, 1, 0);
pFfb->clips[2*i] = 1;
pFfb->clips[2*i+1] = 0;
}
return FFB_PPC_VCE_2D|FFB_PPC_ACE_AUX_ADD;
}
return 0;
}
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