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Diffstat (limited to 'xorg-server/fb/fbtile.c')
-rw-r--r--xorg-server/fb/fbtile.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/xorg-server/fb/fbtile.c b/xorg-server/fb/fbtile.c
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+++ b/xorg-server/fb/fbtile.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 "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,
+ 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;
+ }
+}
+
+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, tileStride, tileHeight,
+ alu, pm, xRot, yRot);
+ else
+ fbOddTile (dst, dstStride, dstX, width, height,
+ tile, tileStride, tileWidth, tileHeight,
+ alu, pm, bpp, xRot, yRot);
+}