diff options
Diffstat (limited to 'mfb/mfbply1rct.c')
| -rw-r--r-- | mfb/mfbply1rct.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/mfb/mfbply1rct.c b/mfb/mfbply1rct.c new file mode 100644 index 000000000..5cb81df53 --- /dev/null +++ b/mfb/mfbply1rct.c @@ -0,0 +1,255 @@ +/* + * $Xorg: mfbply1rct.c,v 1.4 2001/02/09 02:05:19 xorgcvs Exp $ + * +Copyright 1990, 1998 The Open Group + +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. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + * + * Author: Keith Packard, MIT X Consortium + */ + +#include "X.h" + +#include "gcstruct.h" +#include "windowstr.h" +#include "pixmapstr.h" +#include "regionstr.h" +#include "scrnintstr.h" +#include "mistruct.h" + +#include "mfb.h" +#include "maskbits.h" + +#if defined(mips) || defined(sparc) +#define GetHighWord(x) (((int) (x)) >> 16) +#else +#define GetHighWord(x) (((int) (x)) / 65536) +#endif + +#if IMAGE_BYTE_ORDER == MSBFirst +#define intToCoord(i,x,y) (((x) = GetHighWord(i)), ((y) = (int) ((short) (i)))) +#define coordToInt(x,y) (((x) << 16) | (y)) +#define intToX(i) (GetHighWord(i)) +#define intToY(i) ((int) ((short) i)) +#else +#define intToCoord(i,x,y) (((x) = (int) ((short) (i))), ((y) = GetHighWord(i))) +#define coordToInt(x,y) (((y) << 16) | (x)) +#define intToX(i) ((int) ((short) (i))) +#define intToY(i) (GetHighWord(i)) +#endif + +void +MFBFILLPOLY1RECT (pDrawable, pGC, shape, mode, count, ptsIn) + DrawablePtr pDrawable; + GCPtr pGC; + int count; + DDXPointPtr ptsIn; +{ + mfbPrivGCPtr devPriv; + int nlwidth; + PixelType *addrl, *addr; + int maxy; + int origin; + register int vertex1, vertex2; + int c; + BoxPtr extents; + int clip; + int y; + int *vertex1p, *vertex2p; + int *endp; + int x1, x2; + int dx1, dx2; + int dy1, dy2; + int e1, e2; + int step1, step2; + int sign1, sign2; + int h; + int l, r; + PixelType mask, bits = ~((PixelType)0); + int nmiddle; + + devPriv = (mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr); + if (mode == CoordModePrevious || shape != Convex || + REGION_NUM_RECTS(devPriv->pCompositeClip) != 1) + { + miFillPolygon (pDrawable, pGC, shape, mode, count, ptsIn); + return; + } + origin = *((int *) &pDrawable->x); + vertex2 = origin - ((origin & 0x8000) << 1); + extents = &devPriv->pCompositeClip->extents; + vertex1 = *((int *) &extents->x1) - vertex2; + vertex2 = *((int *) &extents->x2) - vertex2 - 0x00010001; + clip = 0; + y = 32767; + maxy = 0; + vertex2p = (int *) ptsIn; + endp = vertex2p + count; + while (count--) + { + c = *vertex2p; + clip |= (c - vertex1) | (vertex2 - c); + c = intToY(c); + if (c < y) + { + y = c; + vertex1p = vertex2p; + } + vertex2p++; + if (c > maxy) + maxy = c; + } + if (y == maxy) + return; + + if (clip & 0x80008000) + { + miFillPolygon (pDrawable, pGC, shape, mode, vertex2p - (int *) ptsIn, ptsIn); + return; + } + + mfbGetPixelWidthAndPointer(pDrawable, nlwidth, addrl); + addrl = mfbScanlineDelta(addrl, y + pDrawable->y, nlwidth); + origin = intToX(origin); + vertex2p = vertex1p; + vertex2 = vertex1 = *vertex2p++; + if (vertex2p == endp) + vertex2p = (int *) ptsIn; +#define Setup(c,x,vertex,dx,dy,e,sign,step) {\ + x = intToX(vertex); \ + if (dy = intToY(c) - y) { \ + dx = intToX(c) - x; \ + step = 0; \ + if (dx >= 0) \ + { \ + e = 0; \ + sign = 1; \ + if (dx >= dy) {\ + step = dx / dy; \ + dx = dx % dy; \ + } \ + } \ + else \ + { \ + e = 1 - dy; \ + sign = -1; \ + dx = -dx; \ + if (dx >= dy) { \ + step = - (dx / dy); \ + dx = dx % dy; \ + } \ + } \ + } \ + x += origin; \ + vertex = c; \ +} + +#define Step(x,dx,dy,e,sign,step) {\ + x += step; \ + if ((e += dx) > 0) \ + { \ + x += sign; \ + e -= dy; \ + } \ +} + for (;;) + { + if (y == intToY(vertex1)) + { + do + { + if (vertex1p == (int *) ptsIn) + vertex1p = endp; + c = *--vertex1p; + Setup (c,x1,vertex1,dx1,dy1,e1,sign1,step1) + } while (y >= intToY(vertex1)); + h = dy1; + } + else + { + Step(x1,dx1,dy1,e1,sign1,step1) + h = intToY(vertex1) - y; + } + if (y == intToY(vertex2)) + { + do + { + c = *vertex2p++; + if (vertex2p == endp) + vertex2p = (int *) ptsIn; + Setup (c,x2,vertex2,dx2,dy2,e2,sign2,step2) + } while (y >= intToY(vertex2)); + if (dy2 < h) + h = dy2; + } + else + { + Step(x2,dx2,dy2,e2,sign2,step2) + if ((c = (intToY(vertex2) - y)) < h) + h = c; + } + /* fill spans for this segment */ + y += h; + for (;;) + { + l = x1; + r = x2; + nmiddle = x2 - x1; + if (nmiddle < 0) + { + nmiddle = -nmiddle; + l = x2; + r = x1; + } + c = l & PIM; + l -= c; + l = l >> PWSH; + addr = addrl + l; + if (c + nmiddle < PPW) + { + mask = SCRRIGHT (bits,c) ^ SCRRIGHT (bits,c+nmiddle); + *addr OPEQ mask; + } + else + { + if (c) + { + mask = SCRRIGHT(bits, c); + *addr OPEQ mask; + nmiddle += c - PPW; + addr++; + } + nmiddle >>= PWSH; + Duff (nmiddle, *addr++ EQWHOLEWORD) + if (mask = ~SCRRIGHT(bits, r & PIM)) + *addr OPEQ mask; + } + if (!--h) + break; + mfbScanlineInc(addrl, nlwidth); + Step(x1,dx1,dy1,e1,sign1,step1) + Step(x2,dx2,dy2,e2,sign2,step2) + } + if (y == maxy) + break; + mfbScanlineInc(addrl, nlwidth); + } +} |