void
fbGlyph24(FbBits * dstBits,
FbStride dstStride,
int dstBpp, FbStip * stipple, FbBits fg, int x, int height)
{
int lshift;
FbStip bits;
CARD8 *dstLine;
CARD8 *dst;
FbStip f0, f1, f2;
int n;
int shift;
f0 = fg;
f1 = FbRot24(f0, 16);
f2 = FbRot24(f0, 8);
dstLine = (CARD8 *) dstBits;
dstLine += (x & ~3) * 3;
dstStride *= (sizeof(FbBits) / sizeof(CARD8));
shift = x & 3;
lshift = 4 - shift;
while (height--) {
bits = *stipple++;
n = lshift;
dst = dstLine;
while (bits) {
switch (FbStipMoveLsb(FbLeftStipBits(bits, n), 4, n)) {
case CASE(0, 0, 0, 0):
break;
case CASE(1, 0, 0, 0):
WRITE2(dst, 0, _AB);
WRITE1(dst, 2, _C);
break;
case CASE(0, 1, 0, 0):
WRITE1(dst, 3, _A);
WRITE2(dst, 4, _BC);
break;
case CASE(1, 1, 0, 0):
WRITE4(dst, 0, _ABCA);
WRITE2(dst, 4, _BC);
break;
case CASE(0, 0, 1, 0):
WRITE2(dst, 6, _AB);
WRITE1(dst, 8, _C);
break;
case CASE(1, 0, 1, 0):
WRITE2(dst, 0, _AB);
WRITE1(dst, 2, _C);
WRITE2(dst, 6, _AB);
WRITE1(dst, 8, _C);
break;
case CASE(0, 1, 1, 0):
WRITE1(dst, 3, _A);
WRITE4(dst, 4, _BCAB);
WRITE1(dst, 8, _C);
break;
case CASE(1, 1, 1, 0):
WRITE8(dst);
WRITE1(dst, 8, _C);
break;
case CASE(0, 0, 0, 1):
WRITE1(dst, 9, _A);
WRITE2(dst, 10, _BC);
break;
case CASE(1, 0, 0, 1):
WRITE2(dst, 0, _AB);
WRITE1(dst, 2, _C);
WRITE1(dst, 9, _A);
WRITE2(dst, 10, _BC);
break;
case CASE(0, 1, 0, 1):
WRITE1(dst, 3, _A);
WRITE2(dst, 4, _BC);
WRITE1(dst, 9, _A);
WRITE2(dst, 10, _BC);
break;
case CASE(1, 1, 0, 1):
WRITE4(dst, 0, _ABCA);
WRITE2(dst, 4, _BC);
WRITE1(dst, 9, _A);
WRITE2(dst, 10, _BC);
break;
case CASE(0, 0, 1, 1):
WRITE2(dst, 6, _AB);
WRITE4(dst, 8, _CABC);
break;
case CASE(1, 0, 1, 1):
WRITE2(dst, 0, _AB);
WRITE1(dst, 2, _C);
WRITE2(dst, 6, _AB);
WRITE4(dst, 8, _CABC);
break;
case CASE(0, 1, 1, 1):
WRITE1(dst, 3, _A);
WRITE4(dst, 4, _BCAB);
WRITE4(dst, 8, _CABC);
break;
case CASE(1, 1, 1, 1):
WRITE8(dst);
WRITE4(dst, 8, _CABC);
break;
}
bits = FbStipLeft(bits, n);
n = 4;
dst += 12;
}
dstLine += dstStride;
}
}
/*
* Use deep mask tables that incorporate rotation, pull
* a variable number of bits out of the stipple and
* reuse the right bits as needed for the next write
*
* Yes, this is probably too much code, but most 24-bpp screens
* have no acceleration so this code is used for stipples, copyplane
* and text
*/
void
fbBltOne24(FbStip * srcLine, FbStride srcStride, /* FbStip units per scanline */
int srcX, /* bit position of source */
FbBits * dst, FbStride dstStride, /* FbBits units per scanline */
int dstX, /* bit position of dest */
int dstBpp, /* bits per destination unit */
int width, /* width in bits of destination */
int height, /* height in scanlines */
FbBits fgand, /* rrop values */
FbBits fgxor, FbBits bgand, FbBits bgxor)
{
FbStip *src, *srcEnd;
FbBits leftMask, rightMask, mask;
int nlMiddle, nl;
FbStip stip, bits;
int remain;
int dstS;
int firstlen;
int rot0, rot;
int nDst;
/*
* Do not read past the end of the buffer!
*/
srcEnd = srcLine + height * srcStride;
srcLine += srcX >> FB_STIP_SHIFT;
dst += dstX >> FB_SHIFT;
srcX &= FB_STIP_MASK;
dstX &= FB_MASK;
rot0 = FbFirst24Rot(dstX);
FbMaskBits(dstX, width, leftMask, nlMiddle, rightMask);
dstS = (dstX + 23) / 24;
firstlen = FbStip24Len - dstS;
nDst = nlMiddle;
if (leftMask)
nDst++;
dstStride -= nDst;
/* opaque copy */
if (bgand == 0 && fgand == 0) {
while (height--) {
rot = rot0;
src = srcLine;
srcLine += srcStride;
fbInitStipBits(srcX, firstlen, stip);
if (leftMask) {
mask = fbStipple24Bits[rot >> 3][stip];
WRITE(dst, (READ(dst) & ~leftMask) |
(FbOpaqueStipple(mask,
FbRot24(fgxor, rot), FbRot24(bgxor, rot))
& leftMask));
dst++;
fbNextStipBits(rot, stip);
}
nl = nlMiddle;
while (nl--) {
mask = fbStipple24Bits[rot >> 3][stip];
WRITE(dst, FbOpaqueStipple(mask,
FbRot24(fgxor, rot),
FbRot24(bgxor, rot)));
dst++;
fbNextStipBits(rot, stip);
}
if (rightMask) {
mask = fbStipple24Bits[rot >> 3][stip];
WRITE(dst, (READ(dst) & ~rightMask) |
(FbOpaqueStipple(mask,
FbRot24(fgxor, rot), FbRot24(bgxor, rot))
& rightMask));
}
dst += dstStride;
src += srcStride;
}
}
/* transparent copy */
else if (bgand == FB_ALLONES && bgxor == 0 && fgand == 0) {