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/*
* Copyright © 1998 Keith Packard
* Copyright © 2012 Intel Corporation
*
* 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.
*/
#include "fb.h"
/*
* Accelerated tile fill -- tile width is a power of two not greater
* than FB_UNIT
*/
static void
fbEvenTile(FbBits *dst, FbStride dstStride, int dstX, int width, int height,
FbBits *tile, FbStride tileStride, int tileHeight,
int alu, FbBits pm,
int xRot, int yRot)
{
FbBits *t, *tileEnd, bits;
FbBits startmask, endmask;
FbBits and, xor;
int n, nmiddle;
int tileX, tileY;
int rot;
int startbyte, endbyte;
dst += dstX >> FB_SHIFT;
dstX &= FB_MASK;
FbMaskBitsBytes(dstX, width, FbDestInvarientRop(alu, pm),
startmask, startbyte, nmiddle, endmask, endbyte);
if (startmask)
dstStride--;
dstStride -= nmiddle;
/*
* Compute tile start scanline and rotation parameters
*/
tileEnd = tile + tileHeight * tileStride;
modulus(-yRot, tileHeight, tileY);
t = tile + tileY * tileStride;
modulus(-xRot, FB_UNIT, tileX);
rot = tileX;
while (height--) {
/*
* Pick up bits for this scanline
*/
bits = READ(t);
t += tileStride;
if (t >= tileEnd)
t = tile;
bits = FbRotLeft(bits, rot);
and = fbAnd(alu, bits, pm);
xor = fbXor(alu, bits, pm);
if (startmask) {
FbDoLeftMaskByteRRop(dst, startbyte, startmask, and, xor);
dst++;
}
n = nmiddle;
if (!and)
while (n--)
WRITE(dst++, xor);
else
while (n--) {
WRITE(dst, FbDoRRop(READ(dst), and, xor));
dst++;
}
if (endmask)
FbDoRightMaskByteRRop(dst, endbyte, endmask, and, xor);
dst += dstStride;
}
}
static void
fbOddTile(FbBits *dst, FbStride dstStride, int dstX,
int width, int height,
FbBits *tile, FbStride tileStride,
int tileWidth, int tileHeight,
int alu, FbBits pm, int bpp,
int xRot, int yRot)
{
int tileX, tileY;
int x, y;
DBG(("%s tile=%dx%d, size=%dx%d\n", __FUNCTION__,
tileWidth, tileHeight, width, height));
modulus(-yRot, tileHeight, tileY);
y = 0;
while (height) {
int ww = width;
int h = tileHeight - tileY;
if (h > height)
h = height;
height -= h;
x = dstX;
modulus(dstX - xRot, tileWidth, tileX);
while (ww) {
int w = tileWidth - tileX;
if (w > ww)
w = ww;
ww -= w;
fbBlt(tile + tileY * tileStride, tileStride, tileX,
dst + y * dstStride, dstStride,
x, w, h, alu, pm, bpp, FALSE, FALSE);
x += w;
tileX = 0;
}
y += h;
tileY = 0;
}
}
void
fbTile(FbBits *dst, FbStride dstStride, int dstX,
int width, int height,
FbBits *tile, FbStride tileStride,
int tileWidth, int tileHeight,
int alu, FbBits pm, int bpp,
int xRot, int yRot)
{
DBG(("%s tile=%dx%d, size=%dx%d\n", __FUNCTION__,
tileWidth, tileHeight, width, height));
if (FbEvenTile(tileWidth))
fbEvenTile(dst, dstStride, dstX, width, height,
tile, tileStride, tileHeight, alu, pm, xRot, yRot);
else
fbOddTile(dst, dstStride, dstX, width, height,
tile, tileStride, tileWidth, tileHeight,
alu, pm, bpp, xRot, yRot);
}
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