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IABSD.fr/xenocara/xserver/fb/fbblt.c
matthieu
- xserver/fb/fbblt.c
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/* * 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 <string.h> #include "fb.h" #define InitializeShifts(sx,dx,ls,rs) { \ if (sx != dx) { \ if (sx > dx) { \ ls = sx - dx; \ rs = FB_UNIT - ls; \ } else { \ rs = dx - sx; \ ls = FB_UNIT - rs; \ } \ } \ } void fbBlt(FbBits * srcLine, FbStride srcStride, int srcX, FbBits * dstLine, FbStride dstStride, int dstX, int width, int height, int alu, FbBits pm, int bpp, Bool reverse, Bool upsidedown) { FbBits *src, *dst; int leftShift, rightShift; FbBits startmask, endmask; FbBits bits, bits1; int n, nmiddle; Bool destInvarient; int startbyte, endbyte; FbDeclareMergeRop(); if (alu == GXcopy && pm == FB_ALLONES && !(srcX & 7) && !(dstX & 7) && !(width & 7)) { CARD8 *src_byte = (CARD8 *) srcLine + (srcX >> 3); CARD8 *dst_byte = (CARD8 *) dstLine + (dstX >> 3); FbStride src_byte_stride = srcStride << (FB_SHIFT - 3); FbStride dst_byte_stride = dstStride << (FB_SHIFT - 3); int width_byte = (width >> 3); /* Make sure there's no overlap; we can't use memcpy in that * case as it's not well defined, so fall through to the * general code */ if (src_byte + width_byte <= dst_byte || dst_byte + width_byte <= src_byte) { int i; if (!upsidedown) for (i = 0; i < height; i++) MEMCPY_WRAPPED(dst_byte + i * dst_byte_stride, src_byte + i * src_byte_stride, width_byte); else for (i = height - 1; i >= 0; i--) MEMCPY_WRAPPED(dst_byte + i * dst_byte_stride, src_byte + i * src_byte_stride, width_byte); return; } } FbInitializeMergeRop(alu, pm); destInvarient = FbDestInvarientMergeRop(); if (upsidedown) { srcLine += (height - 1) * (srcStride); dstLine += (height - 1) * (dstStride); srcStride = -srcStride; dstStride = -dstStride; } FbMaskBitsBytes(dstX, width, destInvarient, startmask, startbyte, nmiddle, endmask, endbyte); if (reverse) { srcLine += ((srcX + width - 1) >> FB_SHIFT) + 1; dstLine += ((dstX + width - 1) >> FB_SHIFT) + 1; srcX = (srcX + width - 1) & FB_MASK; dstX = (dstX + width - 1) & FB_MASK; } else { srcLine += srcX >> FB_SHIFT; dstLine += dstX >> FB_SHIFT; srcX &= FB_MASK; dstX &= FB_MASK; } if (srcX == dstX) { while (height--) { src = srcLine; srcLine += srcStride; dst = dstLine; dstLine += dstStride; if (reverse) { if (endmask) { bits = READ(--src); --dst; FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask); } n = nmiddle; if (destInvarient) { while (n--) WRITE(--dst, FbDoDestInvarientMergeRop(READ(--src))); } else { while (n--) { bits = READ(--src); --dst; WRITE(dst, FbDoMergeRop(bits, READ(dst))); } } if (startmask) { bits = READ(--src); --dst; FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask); } } else { if (startmask) { bits = READ(src++); FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask); dst++; } n = nmiddle; if (destInvarient) { #if 0 /* * This provides some speedup on screen->screen blts * over the PCI bus, usually about 10%. But fb * isn't usually used for this operation... */ if (_ca2 + 1 == 0 && _cx2 == 0) { FbBits t1, t2, t3, t4; while (n >= 4) { t1 = *src++; t2 = *src++; t3 = *src++; t4 = *src++; *dst++ = t1; *dst++ = t2; *dst++ = t3; *dst++ = t4; n -= 4; } } #endif while (n--) WRITE(dst++, FbDoDestInvarientMergeRop(READ(src++))); } else { while (n--) { bits = READ(src++); WRITE(dst, FbDoMergeRop(bits, READ(dst))); dst++; } } if (endmask) { bits = READ(src); FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask); } } } } else { if (srcX > dstX) { leftShift = srcX - dstX; rightShift = FB_UNIT - leftShift; } else { rightShift = dstX - srcX; leftShift = FB_UNIT - rightShift; } while (height--) { src = srcLine; srcLine += srcStride; dst = dstLine; dstLine += dstStride; bits1 = 0; if (reverse) { if (srcX < dstX) bits1 = READ(--src); if (endmask) { bits = FbScrRight(bits1, rightShift); if (FbScrRight(endmask, leftShift)) { bits1 = READ(--src); bits |= FbScrLeft(bits1, leftShift); } --dst; FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask); } n = nmiddle; if (destInvarient) { while (n--) { bits = FbScrRight(bits1, rightShift); bits1 = READ(--src); bits |= FbScrLeft(bits1, leftShift); --dst; WRITE(dst, FbDoDestInvarientMergeRop(bits)); } } else { while (n--) { bits = FbScrRight(bits1, rightShift); bits1 = READ(--src); bits |= FbScrLeft(bits1, leftShift); --dst; WRITE(dst, FbDoMergeRop(bits, READ(dst))); } } if (startmask) { bits = FbScrRight(bits1, rightShift); if (FbScrRight(startmask, leftShift)) { bits1 = READ(--src); bits |= FbScrLeft(bits1, leftShift); } --dst; FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask); } } else { if (srcX > dstX) bits1 = READ(src++); if (startmask) { bits = FbScrLeft(bits1, leftShift); if (FbScrLeft(startmask, rightShift)) { bits1 = READ(src++); bits |= FbScrRight(bits1, rightShift); } FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask); dst++; } n = nmiddle; if (destInvarient) { while (n--) { bits = FbScrLeft(bits1, leftShift); bits1 = READ(src++); bits |= FbScrRight(bits1, rightShift); WRITE(dst, FbDoDestInvarientMergeRop(bits)); dst++; } } else { while (n--) { bits = FbScrLeft(bits1, leftShift); bits1 = READ(src++); bits |= FbScrRight(bits1, rightShift); WRITE(dst, FbDoMergeRop(bits, READ(dst))); dst++; } } if (endmask) { bits = FbScrLeft(bits1, leftShift); if (FbScrLeft(endmask, rightShift)) { bits1 = READ(src); bits |= FbScrRight(bits1, rightShift); } FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask); } } } } } void fbBltStip(FbStip * src, FbStride srcStride, /* in FbStip units, not FbBits units */ int srcX, FbStip * dst, FbStride dstStride, /* in FbStip units, not FbBits units */ int dstX, int width, int height, int alu, FbBits pm, int bpp) { fbBlt((FbBits *) src, FbStipStrideToBitsStride(srcStride), srcX, (FbBits *) dst, FbStipStrideToBitsStride(dstStride), dstX, width, height, alu, pm, bpp, FALSE, FALSE); }