xenocara/xserver/fb/fbgc.c

214 lines
6.0 KiB
C

/*
* Copyright © 1998 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdlib.h>
#include "fb.h"
const GCFuncs fbGCFuncs = {
fbValidateGC,
miChangeGC,
miCopyGC,
miDestroyGC,
miChangeClip,
miDestroyClip,
miCopyClip,
};
const GCOps fbGCOps = {
fbFillSpans,
fbSetSpans,
fbPutImage,
fbCopyArea,
fbCopyPlane,
fbPolyPoint,
fbPolyLine,
fbPolySegment,
fbPolyRectangle,
fbPolyArc,
miFillPolygon,
fbPolyFillRect,
fbPolyFillArc,
miPolyText8,
miPolyText16,
miImageText8,
miImageText16,
fbImageGlyphBlt,
fbPolyGlyphBlt,
fbPushPixels
};
Bool
fbCreateGC(GCPtr pGC)
{
pGC->ops = (GCOps *) &fbGCOps;
pGC->funcs = (GCFuncs *) &fbGCFuncs;
/* fb wants to translate before scan conversion */
pGC->miTranslate = 1;
pGC->fExpose = 1;
fbGetGCPrivate(pGC)->bpp = BitsPerPixel(pGC->depth);
return TRUE;
}
/*
* Pad pixmap to FB_UNIT bits wide
*/
void
fbPadPixmap(PixmapPtr pPixmap)
{
int width;
FbBits *bits;
FbBits b;
FbBits mask;
int height;
int w;
int stride;
int bpp;
_X_UNUSED int xOff, yOff;
fbGetDrawable(&pPixmap->drawable, bits, stride, bpp, xOff, yOff);
width = pPixmap->drawable.width * pPixmap->drawable.bitsPerPixel;
height = pPixmap->drawable.height;
mask = FbBitsMask(0, width);
while (height--) {
b = READ(bits) & mask;
w = width;
while (w < FB_UNIT) {
b = b | FbScrRight(b, w);
w <<= 1;
}
WRITE(bits, b);
bits += stride;
}
fbFinishAccess(&pPixmap->drawable);
}
void
fbValidateGC(GCPtr pGC, unsigned long changes, DrawablePtr pDrawable)
{
FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
FbBits mask;
/*
* if the client clip is different or moved OR the subwindowMode has
* changed OR the window's clip has changed since the last validation
* we need to recompute the composite clip
*/
if ((changes &
(GCClipXOrigin | GCClipYOrigin | GCClipMask | GCSubwindowMode)) ||
(pDrawable->serialNumber != (pGC->serialNumber & DRAWABLE_SERIAL_BITS))
) {
miComputeCompositeClip(pGC, pDrawable);
}
if (pPriv->bpp != pDrawable->bitsPerPixel) {
changes |= GCStipple | GCForeground | GCBackground | GCPlaneMask;
pPriv->bpp = pDrawable->bitsPerPixel;
}
if ((changes & GCTile) && fbGetRotatedPixmap(pGC)) {
(*pGC->pScreen->DestroyPixmap) (fbGetRotatedPixmap(pGC));
fbGetRotatedPixmap(pGC) = 0;
}
if (pGC->fillStyle == FillTiled) {
PixmapPtr pOldTile, pNewTile;
pOldTile = pGC->tile.pixmap;
if (pOldTile->drawable.bitsPerPixel != pDrawable->bitsPerPixel) {
pNewTile = fbGetRotatedPixmap(pGC);
if (!pNewTile ||
pNewTile->drawable.bitsPerPixel != pDrawable->bitsPerPixel) {
if (pNewTile)
(*pGC->pScreen->DestroyPixmap) (pNewTile);
pNewTile =
fb24_32ReformatTile(pOldTile, pDrawable->bitsPerPixel);
}
if (pNewTile) {
fbGetRotatedPixmap(pGC) = pOldTile;
pGC->tile.pixmap = pNewTile;
changes |= GCTile;
}
}
}
if (changes & GCTile) {
if (!pGC->tileIsPixel &&
FbEvenTile(pGC->tile.pixmap->drawable.width *
pDrawable->bitsPerPixel))
fbPadPixmap(pGC->tile.pixmap);
}
if (changes & GCStipple) {
if (pGC->stipple) {
if (pGC->stipple->drawable.width * pDrawable->bitsPerPixel <
FB_UNIT)
fbPadPixmap(pGC->stipple);
}
}
/*
* Recompute reduced rop values
*/
if (changes & (GCForeground | GCBackground | GCPlaneMask | GCFunction)) {
int s;
FbBits depthMask;
mask = FbFullMask(pDrawable->bitsPerPixel);
depthMask = FbFullMask(pDrawable->depth);
pPriv->fg = pGC->fgPixel & mask;
pPriv->bg = pGC->bgPixel & mask;
if ((pGC->planemask & depthMask) == depthMask)
pPriv->pm = mask;
else
pPriv->pm = pGC->planemask & mask;
s = pDrawable->bitsPerPixel;
while (s < FB_UNIT) {
pPriv->fg |= pPriv->fg << s;
pPriv->bg |= pPriv->bg << s;
pPriv->pm |= pPriv->pm << s;
s <<= 1;
}
pPriv->and = fbAnd(pGC->alu, pPriv->fg, pPriv->pm);
pPriv->xor = fbXor(pGC->alu, pPriv->fg, pPriv->pm);
pPriv->bgand = fbAnd(pGC->alu, pPriv->bg, pPriv->pm);
pPriv->bgxor = fbXor(pGC->alu, pPriv->bg, pPriv->pm);
}
if (changes & GCDashList) {
unsigned short n = pGC->numInDashList;
unsigned char *dash = pGC->dash;
unsigned int dashLength = 0;
while (n--)
dashLength += (unsigned int) *dash++;
pPriv->dashLength = dashLength;
}
}