diff options
Diffstat (limited to 'src/sna/fb/fbsegbits.h')
| -rw-r--r-- | src/sna/fb/fbsegbits.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/sna/fb/fbsegbits.h b/src/sna/fb/fbsegbits.h new file mode 100644 index 00000000..590ad300 --- /dev/null +++ b/src/sna/fb/fbsegbits.h @@ -0,0 +1,212 @@ +/* + * 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. + */ + +#define isClipped(c,ul,lr) (((c) | ((c) - (ul)) | ((lr) - (c))) & 0x80008000) +#define RROP(b,a,x) WRITE((b), FbDoRRop (READ(b), (a), (x))) + +static void +BRESSOLID(DrawablePtr drawable, GCPtr gc, int dashOffset, + int sdx, int sdy, int axis, + int x1, int y1, int e, int e1, int e3, int len) +{ + FbBits *dst; + FbStride stride; + int bpp, dx, dy; + BITS *bits; + FbStride major, minor; + BITS xor = fb_gc(gc)->xor; + + fbGetDrawable(drawable, dst, stride, bpp, dx, dy); + bits = (BITS *)(dst + (y1 + dy) * stride) + (x1 + dx); + stride = stride * (sizeof(FbBits) / sizeof(BITS)); + if (sdy < 0) + stride = -stride; + if (axis == X_AXIS) { + major = sdx; + minor = stride; + } else { + major = stride; + minor = sdx; + } + while (len--) { + WRITE(bits, xor); + bits += major; + e += e1; + if (e >= 0) { + bits += minor; + e += e3; + } + } +} + +static void +BRESSOLIDR(DrawablePtr drawable, GCPtr gc, int dashOffset, + int sdx, int sdy, int axis, + int x1, int y1, int e, int e1, int e3, int len) +{ + FbBits *dst; + FbStride stride; + int bpp, dx, dy; + BITS *bits; + FbStride major, minor; + BITS and = fb_gc(gc)->and; + BITS xor = fb_gc(gc)->xor; + + fbGetDrawable(drawable, dst, stride, bpp, dx, dy); + bits = (BITS *)(dst + (y1 + dy) * stride) + (x1 + dx); + stride = stride * (sizeof(FbBits) / sizeof(BITS)); + if (sdy < 0) + stride = -stride; + if (axis == X_AXIS) { + major = sdx; + minor = stride; + } else { + major = stride; + minor = sdx; + } + while (len--) { + RROP(bits, and, xor); + bits += major; + e += e1; + if (e >= 0) { + bits += minor; + e += e3; + } + } +} + +static void +BRESDASH(DrawablePtr drawable, GCPtr gc, int dashOffset, + int sdx, int sdy, int axis, + int x1, int y1, int e, int e1, int e3, int len) +{ + FbBits *dst; + FbStride stride; + int bpp, dx, dy; + BITS *bits; + FbStride major, minor; + + FbDashDeclare; + int dashlen; + bool even; + bool doOdd = gc->lineStyle == LineDoubleDash; + BITS xorfg = fb_gc(gc)->xor; + BITS xorbg = fb_gc(gc)->bgxor; + + fbGetDrawable(drawable, dst, stride, bpp, dx, dy); + + FbDashInit(gc, fb_gc(gc), dashOffset, dashlen, even); + + bits = ((BITS *) (dst + ((y1 + dy) * stride))) + (x1 + dx); + stride = stride * (sizeof(FbBits) / sizeof(BITS)); + if (sdy < 0) + stride = -stride; + if (axis == X_AXIS) { + major = sdx; + minor = stride; + } else { + major = stride; + minor = sdx; + } + if (dashlen >= len) + dashlen = len; + if (doOdd) { + if (!even) + goto doubleOdd; + for (;;) { + len -= dashlen; + while (dashlen--) { + WRITE(bits, xorfg); + bits += major; + if ((e += e1) >= 0) { + e += e3; + bits += minor; + } + } + if (!len) + break; + + FbDashNextEven(dashlen); + + if (dashlen >= len) + dashlen = len; +doubleOdd: + len -= dashlen; + while (dashlen--) { + WRITE(bits, xorbg); + bits += major; + if ((e += e1) >= 0) { + e += e3; + bits += minor; + } + } + if (!len) + break; + + FbDashNextOdd(dashlen); + + if (dashlen >= len) + dashlen = len; + } + } else { + if (!even) + goto onOffOdd; + for (;;) { + len -= dashlen; + while (dashlen--) { + WRITE(bits, xorfg); + bits += major; + if ((e += e1) >= 0) { + e += e3; + bits += minor; + } + } + if (!len) + break; + + FbDashNextEven(dashlen); + + if (dashlen >= len) + dashlen = len; +onOffOdd: + len -= dashlen; + while (dashlen--) { + bits += major; + if ((e += e1) >= 0) { + e += e3; + bits += minor; + } + } + if (!len) + break; + + FbDashNextOdd(dashlen); + + if (dashlen >= len) + dashlen = len; + } + } +} + +#undef RROP +#undef isClipped |