532 lines
17 KiB
C
532 lines
17 KiB
C
/*
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* Copyright © 1998 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <string.h>
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#include "fb.h"
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#define InitializeShifts(sx,dx,ls,rs) { \
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if (sx != dx) { \
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if (sx > dx) { \
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ls = sx - dx; \
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rs = FB_UNIT - ls; \
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} else { \
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rs = dx - sx; \
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ls = FB_UNIT - rs; \
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} \
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} \
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}
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void
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fbBlt(FbBits * srcLine,
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FbStride srcStride,
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int srcX,
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FbBits * dstLine,
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FbStride dstStride,
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int dstX,
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int width,
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int height, int alu, FbBits pm, int bpp, Bool reverse, Bool upsidedown)
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{
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FbBits *src, *dst;
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int leftShift, rightShift;
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FbBits startmask, endmask;
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FbBits bits, bits1;
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int n, nmiddle;
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Bool destInvarient;
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int startbyte, endbyte;
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FbDeclareMergeRop();
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if (alu == GXcopy && pm == FB_ALLONES &&
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!(srcX & 7) && !(dstX & 7) && !(width & 7))
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{
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CARD8 *src_byte = (CARD8 *) srcLine + (srcX >> 3);
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CARD8 *dst_byte = (CARD8 *) dstLine + (dstX >> 3);
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FbStride src_byte_stride = srcStride << (FB_SHIFT - 3);
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FbStride dst_byte_stride = dstStride << (FB_SHIFT - 3);
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int width_byte = (width >> 3);
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/* Make sure there's no overlap; we can't use memcpy in that
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* case as it's not well defined, so fall through to the
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* general code
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*/
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if (src_byte + width_byte <= dst_byte ||
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dst_byte + width_byte <= src_byte)
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{
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int i;
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if (!upsidedown)
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for (i = 0; i < height; i++)
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MEMCPY_WRAPPED(dst_byte + i * dst_byte_stride,
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src_byte + i * src_byte_stride,
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width_byte);
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else
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for (i = height - 1; i >= 0; i--)
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MEMCPY_WRAPPED(dst_byte + i * dst_byte_stride,
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src_byte + i * src_byte_stride,
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width_byte);
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return;
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}
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}
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if (bpp == 24 && !FbCheck24Pix(pm)) {
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fbBlt24(srcLine, srcStride, srcX, dstLine, dstStride, dstX,
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width, height, alu, pm, reverse, upsidedown);
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return;
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}
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FbInitializeMergeRop(alu, pm);
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destInvarient = FbDestInvarientMergeRop();
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if (upsidedown) {
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srcLine += (height - 1) * (srcStride);
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dstLine += (height - 1) * (dstStride);
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srcStride = -srcStride;
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dstStride = -dstStride;
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}
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FbMaskBitsBytes(dstX, width, destInvarient, startmask, startbyte,
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nmiddle, endmask, endbyte);
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if (reverse) {
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srcLine += ((srcX + width - 1) >> FB_SHIFT) + 1;
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dstLine += ((dstX + width - 1) >> FB_SHIFT) + 1;
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srcX = (srcX + width - 1) & FB_MASK;
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dstX = (dstX + width - 1) & FB_MASK;
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}
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else {
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srcLine += srcX >> FB_SHIFT;
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dstLine += dstX >> FB_SHIFT;
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srcX &= FB_MASK;
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dstX &= FB_MASK;
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}
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if (srcX == dstX) {
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while (height--) {
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src = srcLine;
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srcLine += srcStride;
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dst = dstLine;
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dstLine += dstStride;
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if (reverse) {
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if (endmask) {
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bits = READ(--src);
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--dst;
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FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask);
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}
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n = nmiddle;
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if (destInvarient) {
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while (n--)
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WRITE(--dst, FbDoDestInvarientMergeRop(READ(--src)));
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}
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else {
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while (n--) {
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bits = READ(--src);
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--dst;
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WRITE(dst, FbDoMergeRop(bits, READ(dst)));
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}
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}
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if (startmask) {
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bits = READ(--src);
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--dst;
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FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask);
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}
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}
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else {
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if (startmask) {
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bits = READ(src++);
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FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask);
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dst++;
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}
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n = nmiddle;
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if (destInvarient) {
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#if 0
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/*
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* This provides some speedup on screen->screen blts
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* over the PCI bus, usually about 10%. But fb
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* isn't usually used for this operation...
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*/
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if (_ca2 + 1 == 0 && _cx2 == 0) {
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FbBits t1, t2, t3, t4;
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while (n >= 4) {
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t1 = *src++;
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t2 = *src++;
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t3 = *src++;
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t4 = *src++;
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*dst++ = t1;
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*dst++ = t2;
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*dst++ = t3;
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*dst++ = t4;
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n -= 4;
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}
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}
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#endif
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while (n--)
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WRITE(dst++, FbDoDestInvarientMergeRop(READ(src++)));
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}
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else {
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while (n--) {
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bits = READ(src++);
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WRITE(dst, FbDoMergeRop(bits, READ(dst)));
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dst++;
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}
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}
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if (endmask) {
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bits = READ(src);
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FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask);
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}
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}
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}
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}
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else {
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if (srcX > dstX) {
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leftShift = srcX - dstX;
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rightShift = FB_UNIT - leftShift;
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}
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else {
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rightShift = dstX - srcX;
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leftShift = FB_UNIT - rightShift;
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}
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while (height--) {
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src = srcLine;
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srcLine += srcStride;
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dst = dstLine;
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dstLine += dstStride;
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bits1 = 0;
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if (reverse) {
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if (srcX < dstX)
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bits1 = READ(--src);
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if (endmask) {
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bits = FbScrRight(bits1, rightShift);
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if (FbScrRight(endmask, leftShift)) {
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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}
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--dst;
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FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask);
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}
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n = nmiddle;
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if (destInvarient) {
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while (n--) {
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bits = FbScrRight(bits1, rightShift);
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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--dst;
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WRITE(dst, FbDoDestInvarientMergeRop(bits));
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}
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}
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else {
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while (n--) {
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bits = FbScrRight(bits1, rightShift);
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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--dst;
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WRITE(dst, FbDoMergeRop(bits, READ(dst)));
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}
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}
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if (startmask) {
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bits = FbScrRight(bits1, rightShift);
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if (FbScrRight(startmask, leftShift)) {
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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}
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--dst;
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FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask);
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}
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}
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else {
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if (srcX > dstX)
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bits1 = READ(src++);
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if (startmask) {
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bits = FbScrLeft(bits1, leftShift);
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if (FbScrLeft(startmask, rightShift)) {
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bits1 = READ(src++);
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bits |= FbScrRight(bits1, rightShift);
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}
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FbDoLeftMaskByteMergeRop(dst, bits, startbyte, startmask);
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dst++;
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}
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n = nmiddle;
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if (destInvarient) {
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while (n--) {
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bits = FbScrLeft(bits1, leftShift);
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bits1 = READ(src++);
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bits |= FbScrRight(bits1, rightShift);
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WRITE(dst, FbDoDestInvarientMergeRop(bits));
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dst++;
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}
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}
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else {
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while (n--) {
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bits = FbScrLeft(bits1, leftShift);
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bits1 = READ(src++);
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bits |= FbScrRight(bits1, rightShift);
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WRITE(dst, FbDoMergeRop(bits, READ(dst)));
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dst++;
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}
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}
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if (endmask) {
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bits = FbScrLeft(bits1, leftShift);
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if (FbScrLeft(endmask, rightShift)) {
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bits1 = READ(src);
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bits |= FbScrRight(bits1, rightShift);
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}
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FbDoRightMaskByteMergeRop(dst, bits, endbyte, endmask);
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}
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}
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}
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}
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}
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#undef DEBUG_BLT24
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#ifdef DEBUG_BLT24
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static unsigned long
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getPixel(char *src, int x)
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{
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unsigned long l;
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l = 0;
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memcpy(&l, src + x * 3, 3);
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return l;
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}
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#endif
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static void
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fbBlt24Line(FbBits * src,
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int srcX,
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FbBits * dst, int dstX, int width, int alu, FbBits pm, Bool reverse)
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{
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#ifdef DEBUG_BLT24
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char *origDst = (char *) dst;
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FbBits *origLine = dst + ((dstX >> FB_SHIFT) - 1);
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int origNlw = ((width + FB_MASK) >> FB_SHIFT) + 3;
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int origX = dstX / 24;
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#endif
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int leftShift, rightShift;
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FbBits startmask, endmask;
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int n;
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FbBits bits, bits1;
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FbBits mask;
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int rot;
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FbDeclareMergeRop();
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FbInitializeMergeRop(alu, FB_ALLONES);
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FbMaskBits(dstX, width, startmask, n, endmask);
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#ifdef DEBUG_BLT24
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ErrorF("dstX %d width %d reverse %d\n", dstX, width, reverse);
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#endif
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if (reverse) {
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src += ((srcX + width - 1) >> FB_SHIFT) + 1;
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dst += ((dstX + width - 1) >> FB_SHIFT) + 1;
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rot = FbFirst24Rot(((dstX + width - 8) & FB_MASK));
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rot = FbPrev24Rot(rot);
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#ifdef DEBUG_BLT24
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ErrorF("dstX + width - 8: %d rot: %d\n", (dstX + width - 8) & FB_MASK,
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rot);
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#endif
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srcX = (srcX + width - 1) & FB_MASK;
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dstX = (dstX + width - 1) & FB_MASK;
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}
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else {
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src += srcX >> FB_SHIFT;
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dst += dstX >> FB_SHIFT;
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srcX &= FB_MASK;
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dstX &= FB_MASK;
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rot = FbFirst24Rot(dstX);
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#ifdef DEBUG_BLT24
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ErrorF("dstX: %d rot: %d\n", dstX, rot);
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#endif
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}
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mask = FbRot24(pm, rot);
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#ifdef DEBUG_BLT24
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ErrorF("pm 0x%x mask 0x%x\n", pm, mask);
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#endif
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if (srcX == dstX) {
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if (reverse) {
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if (endmask) {
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bits = READ(--src);
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--dst;
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & endmask));
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mask = FbPrev24Pix(mask);
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}
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while (n--) {
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bits = READ(--src);
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--dst;
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask));
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mask = FbPrev24Pix(mask);
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}
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if (startmask) {
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bits = READ(--src);
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--dst;
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & startmask));
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}
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}
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else {
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if (startmask) {
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bits = READ(src++);
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & startmask));
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dst++;
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mask = FbNext24Pix(mask);
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}
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while (n--) {
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bits = READ(src++);
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask));
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dst++;
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mask = FbNext24Pix(mask);
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}
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if (endmask) {
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bits = READ(src);
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & endmask));
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}
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}
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}
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else {
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if (srcX > dstX) {
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leftShift = srcX - dstX;
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rightShift = FB_UNIT - leftShift;
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}
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else {
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rightShift = dstX - srcX;
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leftShift = FB_UNIT - rightShift;
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}
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bits1 = 0;
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if (reverse) {
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if (srcX < dstX)
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bits1 = READ(--src);
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if (endmask) {
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bits = FbScrRight(bits1, rightShift);
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if (FbScrRight(endmask, leftShift)) {
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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}
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--dst;
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & endmask));
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mask = FbPrev24Pix(mask);
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}
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while (n--) {
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bits = FbScrRight(bits1, rightShift);
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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--dst;
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask));
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mask = FbPrev24Pix(mask);
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}
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if (startmask) {
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bits = FbScrRight(bits1, rightShift);
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if (FbScrRight(startmask, leftShift)) {
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bits1 = READ(--src);
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bits |= FbScrLeft(bits1, leftShift);
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}
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--dst;
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & startmask));
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}
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}
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else {
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if (srcX > dstX)
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bits1 = READ(src++);
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if (startmask) {
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bits = FbScrLeft(bits1, leftShift);
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bits1 = READ(src++);
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bits |= FbScrRight(bits1, rightShift);
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & startmask));
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dst++;
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mask = FbNext24Pix(mask);
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}
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while (n--) {
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bits = FbScrLeft(bits1, leftShift);
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bits1 = READ(src++);
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bits |= FbScrRight(bits1, rightShift);
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask));
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dst++;
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mask = FbNext24Pix(mask);
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}
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if (endmask) {
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bits = FbScrLeft(bits1, leftShift);
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if (FbScrLeft(endmask, rightShift)) {
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bits1 = READ(src);
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bits |= FbScrRight(bits1, rightShift);
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}
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WRITE(dst, FbDoMaskMergeRop(bits, READ(dst), mask & endmask));
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}
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}
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}
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#ifdef DEBUG_BLT24
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{
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int firstx, lastx, x;
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firstx = origX;
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if (firstx)
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firstx--;
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lastx = origX + width / 24 + 1;
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for (x = firstx; x <= lastx; x++)
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ErrorF("%06x ", getPixel(origDst, x));
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ErrorF("\n");
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while (origNlw--)
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ErrorF("%08x ", *origLine++);
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ErrorF("\n");
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}
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#endif
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}
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void
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fbBlt24(FbBits * srcLine,
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FbStride srcStride,
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int srcX,
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FbBits * dstLine,
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FbStride dstStride,
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int dstX,
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int width,
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int height, int alu, FbBits pm, Bool reverse, Bool upsidedown)
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{
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if (upsidedown) {
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srcLine += (height - 1) * srcStride;
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dstLine += (height - 1) * dstStride;
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srcStride = -srcStride;
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dstStride = -dstStride;
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}
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while (height--) {
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fbBlt24Line(srcLine, srcX, dstLine, dstX, width, alu, pm, reverse);
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srcLine += srcStride;
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dstLine += dstStride;
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}
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#ifdef DEBUG_BLT24
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ErrorF("\n");
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#endif
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}
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void
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fbBltStip(FbStip * src, FbStride srcStride, /* in FbStip units, not FbBits units */
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int srcX, FbStip * dst, FbStride dstStride, /* in FbStip units, not FbBits units */
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int dstX, int width, int height, int alu, FbBits pm, int bpp)
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{
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fbBlt((FbBits *) src, FbStipStrideToBitsStride(srcStride), srcX,
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(FbBits *) dst, FbStipStrideToBitsStride(dstStride), dstX,
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width, height, alu, pm, bpp, FALSE, FALSE);
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}
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