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/*
* Acceleration for the Leo (ZX) framebuffer - stipple/tile verification.
*
* Copyright (C) 1999 Jakub Jelinek (jakub@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 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.
*/
/* $XFree86$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define PSZ 32
#include "leo.h"
#include "pixmapstr.h"
#include "scrnintstr.h"
#include "fb.h"
int
LeoCheckTile (PixmapPtr pPixmap, LeoStipplePtr stipple, int ox, int oy)
{
unsigned int *sbits;
unsigned int fg = 0, bg = 0;
int fgset = 0, bgset = 0;
unsigned int *tilebitsLine, *tilebits, tilebit;
unsigned int sbit, mask;
int nbwidth;
int h, w;
int x, y;
int s_y, s_x;
h = pPixmap->drawable.height;
if (h > 32 || (h & (h - 1)))
return FALSE;
w = pPixmap->drawable.width;
if (w > 32 || (w & (w - 1)))
return FALSE;
stipple->patalign = (oy << 16) | ox;
sbits = stipple->bits;
tilebitsLine = (unsigned int *) pPixmap->devPrivate.ptr;
nbwidth = pPixmap->devKind / sizeof(unsigned int);
for (y = 0; y < h; y++) {
tilebits = tilebitsLine;
tilebitsLine += nbwidth;
sbit = 0;
mask = 1 << 31;
for (x = 0; x < w; x++) {
tilebit = *tilebits++;
if (fgset && tilebit == fg)
sbit |= mask;
else if (!bgset || tilebit != bg) {
if (!fgset) {
fgset = 1;
fg = tilebit;
sbit |= mask;
} else if (!bgset) {
bgset = 1;
bg = tilebit;
} else
return FALSE;
}
mask >>= 1;
}
for (s_x = w; s_x < 32; s_x <<= 1)
sbit = sbit | (sbit >> s_x);
sbit = (sbit >> ox) | (sbit << (32 - ox));
for (s_y = y; s_y < 32; s_y += h)
sbits[(s_y + oy) & 31] = sbit;
}
stipple->fg = fg;
stipple->bg = bg;
return TRUE;
}
int
LeoCheckStipple (PixmapPtr pPixmap, LeoStipplePtr stipple, int ox, int oy)
{
unsigned int *sbits;
unsigned int *stippleBits;
unsigned int sbit, mask, nbwidth;
int h, w;
int y;
int s_y, s_x;
h = pPixmap->drawable.height;
if (h > 32 || (h & (h - 1)))
return FALSE;
w = pPixmap->drawable.width;
if (w > 32 || (w & (w - 1)))
return FALSE;
stipple->patalign = (oy << 16) | ox;
sbits = stipple->bits;
stippleBits = (unsigned int *) pPixmap->devPrivate.ptr;
nbwidth = pPixmap->devKind / sizeof(unsigned int);
mask = ~0 << (32 - w);
for (y = 0; y < h; y++) {
sbit = (*stippleBits) & mask;
stippleBits += nbwidth;
for (s_x = w; s_x < 32; s_x <<= 1)
sbit = sbit | (sbit >> s_x);
sbit = (sbit >> ox) | (sbit << (32 - ox));
for (s_y = y; s_y < 32; s_y += h)
sbits[(s_y + oy) & 31] = sbit;
}
return TRUE;
}
int
LeoCheckFill (GCPtr pGC, DrawablePtr pDrawable)
{
LeoPrivGCPtr gcPriv = LeoGetGCPrivate (pGC);
ScreenPtr pScreen = pDrawable->pScreen;
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
LeoPtr pLeo = GET_LEO_FROM_SCRN(pScrn);
LeoStipplePtr stipple;
unsigned int alu;
int xrot, yrot;
if (pGC->fillStyle == FillSolid) {
if (gcPriv->stipple) {
xfree (gcPriv->stipple);
gcPriv->stipple = 0;
}
return TRUE;
}
if (!(stipple = gcPriv->stipple)) {
if (!pLeo->tmpStipple) {
pLeo->tmpStipple = (LeoStipplePtr) xalloc (sizeof *pLeo->tmpStipple);
if (!pLeo->tmpStipple)
return FALSE;
}
stipple = pLeo->tmpStipple;
}
xrot = (pGC->patOrg.x + pDrawable->x) & 31;
yrot = (pGC->patOrg.y + pDrawable->y) & 31;
alu = pGC->alu;
switch (pGC->fillStyle) {
case FillTiled:
if (!LeoCheckTile (pGC->tile.pixmap, stipple, xrot, yrot)) {
if (gcPriv->stipple) {
xfree (gcPriv->stipple);
gcPriv->stipple = 0;
}
return FALSE;
}
break;
case FillStippled:
alu |= 0x80;
case FillOpaqueStippled:
if (!LeoCheckStipple (pGC->stipple, stipple, xrot, yrot)) {
if (gcPriv->stipple) {
xfree (gcPriv->stipple);
gcPriv->stipple = 0;
}
return FALSE;
}
stipple->fg = pGC->fgPixel;
stipple->bg = pGC->bgPixel;
break;
}
stipple->alu = alu;
gcPriv->stipple = stipple;
if (stipple == pLeo->tmpStipple)
pLeo->tmpStipple = 0;
return TRUE;
}
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