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Diffstat (limited to 'fb/fbtile.c')
| -rw-r--r-- | fb/fbtile.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/fb/fbtile.c b/fb/fbtile.c new file mode 100644 index 000000000..ed447f8d3 --- /dev/null +++ b/fb/fbtile.c @@ -0,0 +1,200 @@ +/* + * Id: fbtile.c,v 1.1 1999/11/02 03:54:45 keithp Exp $ + * + * 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. + */ +/* $XFree86: xc/programs/Xserver/fb/fbtile.c,v 1.4 2000/02/23 20:29:48 dawes Exp $ */ + +#include "fb.h" + +/* + * Accelerated tile fill -- tile width is a power of two not greater + * than FB_UNIT + */ + +void +fbEvenTile (FbBits *dst, + FbStride dstStride, + int dstX, + + int width, + int height, + + FbBits *tile, + 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; + modulus (- yRot, tileHeight, tileY); + t = tile + tileY; + modulus (- xRot, FB_UNIT, tileX); + rot = tileX; + + while (height--) + { + + /* + * Pick up bits for this scanline + */ + bits = *t++; + 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--) + *dst++ = xor; + else + while (n--) + { + *dst = FbDoRRop (*dst, and, xor); + dst++; + } + if (endmask) + FbDoRightMaskByteRRop(dst, endbyte, endmask, and, xor); + dst += dstStride; + } +} + +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 widthTmp; + int h, w; + int x, y; + + modulus (- yRot, tileHeight, tileY); + y = 0; + while (height) + { + h = tileHeight - tileY; + if (h > height) + h = height; + height -= h; + widthTmp = width; + x = dstX; + modulus (dstX - xRot, tileWidth, tileX); + while (widthTmp) + { + w = tileWidth - tileX; + if (w > widthTmp) + w = widthTmp; + widthTmp -= 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) +{ + if (FbEvenTile (tileWidth)) + fbEvenTile (dst, dstStride, dstX, width, height, + tile, tileHeight, + alu, pm, xRot, yRot); + else + fbOddTile (dst, dstStride, dstX, width, height, + tile, tileStride, tileWidth, tileHeight, + alu, pm, bpp, xRot, yRot); +} |