720 lines
18 KiB
C
720 lines
18 KiB
C
/*
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* Copyright © 2001 Keith Packard
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*
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* Partly based on code that is Copyright © The XFree86 Project Inc.
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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_CONFIG_H
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#include <kdrive-config.h>
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#endif
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#include "kdrive.h"
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#include "kaa.h"
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#ifdef RENDER
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#include "mipict.h"
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#define KAA_DEBUG_FALLBACKS 0
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#if KAA_DEBUG_FALLBACKS
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static void kaaCompositeFallbackPictDesc(PicturePtr pict, char *string, int n)
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{
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char format[20];
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char size[20];
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char loc;
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int temp;
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if (!pict) {
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snprintf(string, n, "None");
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return;
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}
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switch (pict->format)
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{
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case PICT_a8r8g8b8:
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snprintf(format, 20, "ARGB8888");
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break;
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case PICT_r5g6b5:
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snprintf(format, 20, "RGB565 ");
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break;
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case PICT_x1r5g5b5:
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snprintf(format, 20, "RGB555 ");
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break;
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case PICT_a8:
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snprintf(format, 20, "A8 ");
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break;
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case PICT_a1:
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snprintf(format, 20, "A1 ");
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break;
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default:
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snprintf(format, 20, "0x%x", (int)pict->format);
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break;
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}
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loc = kaaGetOffscreenPixmap(pict->pDrawable, &temp, &temp) ? 's' : 'm';
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snprintf(size, 20, "%dx%d%s", pict->pDrawable->width,
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pict->pDrawable->height, pict->repeat ?
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" R" : "");
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snprintf(string, n, "0x%lx:%c fmt %s (%s)", (long)pict, loc, format, size);
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}
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static void
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kaaPrintCompositeFallback(CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst)
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{
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char sop[20];
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char srcdesc[40], maskdesc[40], dstdesc[40];
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switch(op)
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{
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case PictOpSrc:
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sprintf(sop, "Src");
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break;
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case PictOpOver:
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sprintf(sop, "Over");
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break;
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default:
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sprintf(sop, "0x%x", (int)op);
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break;
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}
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kaaCompositeFallbackPictDesc(pSrc, srcdesc, 40);
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kaaCompositeFallbackPictDesc(pMask, maskdesc, 40);
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kaaCompositeFallbackPictDesc(pDst, dstdesc, 40);
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ErrorF("Composite fallback: op %s, \n"
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" src %s, \n"
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" mask %s, \n"
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" dst %s, \n",
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sop, srcdesc, maskdesc, dstdesc);
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}
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static void
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kaaPrintTrapezoidFallback(PicturePtr pDst)
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{
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char dstdesc[40];
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kaaCompositeFallbackPictDesc(pDst, dstdesc, 40);
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ErrorF("Trapezoid fallback: dst %s, %c/%s\n",
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dstdesc,
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(pDst->polyMode == PolyModePrecise) ? 'p' : 'i',
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(pDst->polyEdge == PolyEdgeSharp) ? "a" : "aa");
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}
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#endif
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static Bool
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kaaGetPixelFromRGBA(CARD32 *pixel,
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CARD16 red,
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CARD16 green,
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CARD16 blue,
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CARD16 alpha,
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CARD32 format)
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{
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int rbits, bbits, gbits, abits;
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int rshift, bshift, gshift, ashift;
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*pixel = 0;
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if (!PICT_FORMAT_COLOR(format))
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return FALSE;
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rbits = PICT_FORMAT_R(format);
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gbits = PICT_FORMAT_G(format);
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bbits = PICT_FORMAT_B(format);
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abits = PICT_FORMAT_A(format);
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if (PICT_FORMAT_TYPE(format) == PICT_TYPE_ARGB) {
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bshift = 0;
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gshift = bbits;
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rshift = gshift + gbits;
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ashift = rshift + rbits;
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} else { /* PICT_TYPE_ABGR */
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rshift = 0;
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gshift = rbits;
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bshift = gshift + gbits;
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ashift = bshift + bbits;
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}
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*pixel |= ( blue >> (16 - bbits)) << bshift;
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*pixel |= ( red >> (16 - rbits)) << rshift;
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*pixel |= (green >> (16 - gbits)) << gshift;
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*pixel |= (alpha >> (16 - abits)) << ashift;
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return TRUE;
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}
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static Bool
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kaaGetRGBAFromPixel(CARD32 pixel,
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CARD16 *red,
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CARD16 *green,
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CARD16 *blue,
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CARD16 *alpha,
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CARD32 format)
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{
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int rbits, bbits, gbits, abits;
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int rshift, bshift, gshift, ashift;
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if (!PICT_FORMAT_COLOR(format))
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return FALSE;
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rbits = PICT_FORMAT_R(format);
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gbits = PICT_FORMAT_G(format);
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bbits = PICT_FORMAT_B(format);
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abits = PICT_FORMAT_A(format);
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if (PICT_FORMAT_TYPE(format) == PICT_TYPE_ARGB) {
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bshift = 0;
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gshift = bbits;
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rshift = gshift + gbits;
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ashift = rshift + rbits;
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} else { /* PICT_TYPE_ABGR */
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rshift = 0;
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gshift = rbits;
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bshift = gshift + gbits;
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ashift = bshift + bbits;
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}
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*red = ((pixel >> rshift ) & ((1 << rbits) - 1)) << (16 - rbits);
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while (rbits < 16) {
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*red |= *red >> rbits;
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rbits <<= 1;
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}
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*green = ((pixel >> gshift ) & ((1 << gbits) - 1)) << (16 - gbits);
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while (gbits < 16) {
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*green |= *green >> gbits;
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gbits <<= 1;
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}
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*blue = ((pixel >> bshift ) & ((1 << bbits) - 1)) << (16 - bbits);
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while (bbits < 16) {
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*blue |= *blue >> bbits;
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bbits <<= 1;
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}
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if (abits) {
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*alpha = ((pixel >> ashift ) & ((1 << abits) - 1)) << (16 - abits);
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while (abits < 16) {
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*alpha |= *alpha >> abits;
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abits <<= 1;
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}
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} else
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*alpha = 0xffff;
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return TRUE;
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}
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static int
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kaaTryDriverSolidFill(PicturePtr pSrc,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height)
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{
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KaaScreenPriv (pDst->pDrawable->pScreen);
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RegionRec region;
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BoxPtr pbox;
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int nbox;
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int dst_off_x, dst_off_y;
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PixmapPtr pSrcPix, pDstPix;
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CARD32 pixel;
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CARD16 red, green, blue, alpha;
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xDst += pDst->pDrawable->x;
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yDst += pDst->pDrawable->y;
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xSrc += pSrc->pDrawable->x;
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ySrc += pSrc->pDrawable->y;
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if (!miComputeCompositeRegion (®ion, pSrc, NULL, pDst,
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xSrc, ySrc, 0, 0, xDst, yDst,
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width, height))
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return 1;
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if (pSrc->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseMemory ((PixmapPtr) pSrc->pDrawable);
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if (pDst->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseScreen ((PixmapPtr) pDst->pDrawable);
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pDstPix = kaaGetOffscreenPixmap (pDst->pDrawable, &dst_off_x, &dst_off_y);
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if (!pDstPix) {
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 0;
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}
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if (pSrc->pDrawable->type == DRAWABLE_WINDOW)
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pSrcPix = (*pSrc->pDrawable->pScreen->GetWindowPixmap)(
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(WindowPtr) (pSrc->pDrawable));
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else
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pSrcPix = (PixmapPtr) (pSrc->pDrawable);
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/* If source is offscreen, we need to sync the accelerator
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* before accessing it. We'd prefer for it to be in memory.
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*/
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if (kaaPixmapIsOffscreen(pSrcPix)) {
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kaaWaitSync(pDst->pDrawable->pScreen);
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}
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pixel = *(CARD32 *)(pSrcPix->devPrivate.ptr);
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if (!kaaGetRGBAFromPixel(pixel, &red, &green, &blue, &alpha,
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pSrc->format))
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{
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return -1;
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}
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kaaGetPixelFromRGBA(&pixel, red, green, blue, alpha,
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pDst->format);
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if (!(*pKaaScr->info->PrepareSolid) (pDstPix, GXcopy, 0xffffffff, pixel))
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{
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return -1;
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}
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nbox = REGION_NUM_RECTS(®ion);
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pbox = REGION_RECTS(®ion);
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while (nbox--)
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{
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(*pKaaScr->info->Solid) (pbox->x1 + dst_off_x,
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pbox->y1 + dst_off_y,
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pbox->x2 + dst_off_x,
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pbox->y2 + dst_off_y);
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pbox++;
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}
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(*pKaaScr->info->DoneSolid) ();
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kaaMarkSync (pDst->pDrawable->pScreen);
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kaaDrawableDirty (pDst->pDrawable);
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 1;
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}
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static int
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kaaTryDriverBlend(CARD8 op,
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PicturePtr pSrc,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height)
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{
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KaaScreenPriv (pDst->pDrawable->pScreen);
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RegionRec region;
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BoxPtr pbox;
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int nbox;
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int src_off_x, src_off_y, dst_off_x, dst_off_y;
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PixmapPtr pSrcPix, pDstPix;
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struct _Pixmap srcScratch;
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xDst += pDst->pDrawable->x;
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yDst += pDst->pDrawable->y;
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xSrc += pSrc->pDrawable->x;
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ySrc += pSrc->pDrawable->y;
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if (!miComputeCompositeRegion (®ion, pSrc, NULL, pDst,
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xSrc, ySrc, 0, 0, xDst, yDst,
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width, height))
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return 1;
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if (pSrc->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseScreen ((PixmapPtr) pSrc->pDrawable);
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if (pDst->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseScreen ((PixmapPtr) pDst->pDrawable);
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pSrcPix = kaaGetOffscreenPixmap (pSrc->pDrawable, &src_off_x, &src_off_y);
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pDstPix = kaaGetOffscreenPixmap (pDst->pDrawable, &dst_off_x, &dst_off_y);
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if (!pDstPix) {
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 0;
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}
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if (!pSrcPix && pKaaScr->info->UploadToScratch) {
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if ((*pKaaScr->info->UploadToScratch) ((PixmapPtr) pSrc->pDrawable,
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&srcScratch))
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pSrcPix = &srcScratch;
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}
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if (!pSrcPix) {
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 0;
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}
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if (!(*pKaaScr->info->PrepareBlend) (op, pSrc, pDst, pSrcPix,
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pDstPix))
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{
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return -1;
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}
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nbox = REGION_NUM_RECTS(®ion);
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pbox = REGION_RECTS(®ion);
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xSrc -= xDst;
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ySrc -= yDst;
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while (nbox--)
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{
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(*pKaaScr->info->Blend) (pbox->x1 + xSrc + src_off_x,
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pbox->y1 + ySrc + src_off_y,
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pbox->x1 + dst_off_x,
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pbox->y1 + dst_off_y,
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pbox->x2 - pbox->x1,
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pbox->y2 - pbox->y1);
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pbox++;
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}
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(*pKaaScr->info->DoneBlend) ();
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kaaMarkSync (pDst->pDrawable->pScreen);
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kaaDrawableDirty (pDst->pDrawable);
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 1;
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}
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static int
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kaaTryDriverComposite(CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height)
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{
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KaaScreenPriv (pDst->pDrawable->pScreen);
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RegionRec region;
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BoxPtr pbox;
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int nbox;
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int src_off_x, src_off_y, mask_off_x, mask_off_y, dst_off_x, dst_off_y;
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PixmapPtr pSrcPix, pMaskPix = NULL, pDstPix;
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struct _Pixmap scratch;
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xDst += pDst->pDrawable->x;
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yDst += pDst->pDrawable->y;
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if (pMask) {
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xMask += pMask->pDrawable->x;
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yMask += pMask->pDrawable->y;
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}
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xSrc += pSrc->pDrawable->x;
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ySrc += pSrc->pDrawable->y;
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if (!miComputeCompositeRegion (®ion, pSrc, pMask, pDst,
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xSrc, ySrc, xMask, yMask, xDst, yDst,
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width, height))
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return 1;
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if (pKaaScr->info->CheckComposite &&
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!(*pKaaScr->info->CheckComposite) (op, pSrc, pMask, pDst))
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{
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return -1;
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}
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if (pSrc->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseScreen ((PixmapPtr) pSrc->pDrawable);
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if (pMask && pMask->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseScreen ((PixmapPtr) pMask->pDrawable);
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if (pDst->pDrawable->type == DRAWABLE_PIXMAP)
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kaaPixmapUseScreen ((PixmapPtr) pDst->pDrawable);
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pSrcPix = kaaGetOffscreenPixmap (pSrc->pDrawable, &src_off_x, &src_off_y);
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if (pMask)
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pMaskPix = kaaGetOffscreenPixmap (pMask->pDrawable, &mask_off_x,
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&mask_off_y);
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pDstPix = kaaGetOffscreenPixmap (pDst->pDrawable, &dst_off_x, &dst_off_y);
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if (!pDstPix) {
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 0;
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}
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if (!pSrcPix && (!pMask || pMaskPix) && pKaaScr->info->UploadToScratch) {
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if (pSrc->pDrawable->type == DRAWABLE_WINDOW)
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pSrcPix = (*pSrc->pDrawable->pScreen->GetWindowPixmap) (
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(WindowPtr) pSrc->pDrawable);
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else
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pSrcPix = (PixmapPtr) pSrc->pDrawable;
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if ((*pKaaScr->info->UploadToScratch) (pSrcPix, &scratch))
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pSrcPix = &scratch;
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} else if (pSrcPix && pMask && !pMaskPix && pKaaScr->info->UploadToScratch) {
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if (pMask->pDrawable->type == DRAWABLE_WINDOW)
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pMaskPix = (*pMask->pDrawable->pScreen->GetWindowPixmap) (
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(WindowPtr) pMask->pDrawable);
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else
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pMaskPix = (PixmapPtr) pMask->pDrawable;
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if ((*pKaaScr->info->UploadToScratch) (pMaskPix, &scratch))
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pMaskPix = &scratch;
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}
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if (!pSrcPix || (pMask && !pMaskPix)) {
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return 0;
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}
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if (!(*pKaaScr->info->PrepareComposite) (op, pSrc, pMask, pDst, pSrcPix,
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pMaskPix, pDstPix))
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{
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REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
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return -1;
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}
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nbox = REGION_NUM_RECTS(®ion);
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pbox = REGION_RECTS(®ion);
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|
|
|
xMask -= xDst;
|
|
yMask -= yDst;
|
|
|
|
xSrc -= xDst;
|
|
ySrc -= yDst;
|
|
|
|
while (nbox--)
|
|
{
|
|
(*pKaaScr->info->Composite) (pbox->x1 + xSrc + src_off_x,
|
|
pbox->y1 + ySrc + src_off_y,
|
|
pbox->x1 + xMask + mask_off_x,
|
|
pbox->y1 + yMask + mask_off_y,
|
|
pbox->x1 + dst_off_x,
|
|
pbox->y1 + dst_off_y,
|
|
pbox->x2 - pbox->x1,
|
|
pbox->y2 - pbox->y1);
|
|
pbox++;
|
|
}
|
|
|
|
(*pKaaScr->info->DoneComposite) ();
|
|
kaaMarkSync (pDst->pDrawable->pScreen);
|
|
kaaDrawableDirty (pDst->pDrawable);
|
|
|
|
REGION_UNINIT(pDst->pDrawable->pScreen, ®ion);
|
|
return 1;
|
|
}
|
|
|
|
|
|
void
|
|
kaaComposite(CARD8 op,
|
|
PicturePtr pSrc,
|
|
PicturePtr pMask,
|
|
PicturePtr pDst,
|
|
INT16 xSrc,
|
|
INT16 ySrc,
|
|
INT16 xMask,
|
|
INT16 yMask,
|
|
INT16 xDst,
|
|
INT16 yDst,
|
|
CARD16 width,
|
|
CARD16 height)
|
|
{
|
|
KdScreenPriv (pDst->pDrawable->pScreen);
|
|
KaaScreenPriv (pDst->pDrawable->pScreen);
|
|
int ret = -1;
|
|
|
|
if (!pMask && pSrc->pDrawable)
|
|
{
|
|
if (op == PictOpSrc)
|
|
{
|
|
if (pScreenPriv->enabled && pSrc->pDrawable && pSrc->pDrawable->width == 1 &&
|
|
pSrc->pDrawable->height == 1 && pSrc->repeat)
|
|
{
|
|
ret = kaaTryDriverSolidFill(pSrc, pDst, xSrc, ySrc, xDst, yDst,
|
|
width, height);
|
|
if (ret == 1)
|
|
return;
|
|
}
|
|
else if (!pSrc->repeat && !pSrc->transform &&
|
|
pSrc->format == pDst->format)
|
|
{
|
|
RegionRec region;
|
|
|
|
xDst += pDst->pDrawable->x;
|
|
yDst += pDst->pDrawable->y;
|
|
xSrc += pSrc->pDrawable->x;
|
|
ySrc += pSrc->pDrawable->y;
|
|
|
|
if (!miComputeCompositeRegion (®ion, pSrc, pMask, pDst,
|
|
xSrc, ySrc, xMask, yMask, xDst,
|
|
yDst, width, height))
|
|
return;
|
|
|
|
|
|
kaaCopyNtoN (pSrc->pDrawable, pDst->pDrawable, 0,
|
|
REGION_RECTS(®ion), REGION_NUM_RECTS(®ion),
|
|
xSrc - xDst, ySrc - yDst,
|
|
FALSE, FALSE, 0, 0);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pScreenPriv->enabled && pKaaScr->info->PrepareBlend &&
|
|
!pSrc->alphaMap && !pDst->alphaMap)
|
|
{
|
|
ret = kaaTryDriverBlend(op, pSrc, pDst, xSrc, ySrc, xDst, yDst,
|
|
width, height);
|
|
if (ret == 1)
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pSrc->pDrawable && (!pMask || pMask->pDrawable) &&
|
|
pScreenPriv->enabled && pKaaScr->info->PrepareComposite &&
|
|
!pSrc->alphaMap && (!pMask || !pMask->alphaMap) && !pDst->alphaMap)
|
|
{
|
|
ret = kaaTryDriverComposite(op, pSrc, pMask, pDst, xSrc, ySrc, xMask,
|
|
yMask, xDst, yDst, width, height);
|
|
if (ret == 1)
|
|
return;
|
|
}
|
|
|
|
if (ret != 0) {
|
|
/* failure to accelerate was not due to pixmaps being in the wrong
|
|
* locations.
|
|
*/
|
|
if (pSrc->pDrawable->type == DRAWABLE_PIXMAP)
|
|
kaaPixmapUseMemory ((PixmapPtr) pSrc->pDrawable);
|
|
if (pMask && pMask->pDrawable->type == DRAWABLE_PIXMAP)
|
|
kaaPixmapUseMemory ((PixmapPtr) pMask->pDrawable);
|
|
if (pDst->pDrawable->type == DRAWABLE_PIXMAP)
|
|
kaaPixmapUseMemory ((PixmapPtr) pDst->pDrawable);
|
|
}
|
|
|
|
#if KAA_DEBUG_FALLBACKS
|
|
kaaPrintCompositeFallback (op, pSrc, pMask, pDst);
|
|
#endif
|
|
|
|
KdCheckComposite (op, pSrc, pMask, pDst, xSrc, ySrc,
|
|
xMask, yMask, xDst, yDst, width, height);
|
|
}
|
|
#endif
|
|
|
|
static xFixed
|
|
miLineFixedX (xLineFixed *l, xFixed y, Bool ceil)
|
|
{
|
|
xFixed dx = l->p2.x - l->p1.x;
|
|
xFixed_32_32 ex = (xFixed_32_32) (y - l->p1.y) * dx;
|
|
xFixed dy = l->p2.y - l->p1.y;
|
|
if (ceil)
|
|
ex += (dy - 1);
|
|
return l->p1.x + (xFixed) (ex / dy);
|
|
}
|
|
|
|
/* Need to decide just how much to trim, to maintain translation independence
|
|
* when converted to floating point.
|
|
*/
|
|
#define XFIXED_TO_FLOAT(x) (((float)((x) & 0xffffff00)) / 65536.0)
|
|
|
|
/* This is just to allow us to work on the hardware side of the problem while
|
|
* waiting for cairo to get a new tesselator. We may not be able to support
|
|
* RasterizeTrapezoid at all due to the abutting edges requirement, but it might
|
|
* be technically legal if we widened the trap by some epsilon, so that alpha
|
|
* values at abutting edges were a little too big and capped at one, rather than
|
|
* a little too small and looked bad.
|
|
*/
|
|
void kaaRasterizeTrapezoid(PicturePtr pDst,
|
|
xTrapezoid *trap,
|
|
int xoff,
|
|
int yoff)
|
|
{
|
|
KdScreenPriv (pDst->pDrawable->pScreen);
|
|
KaaScreenPriv (pDst->pDrawable->pScreen);
|
|
KaaTrapezoid ktrap;
|
|
PixmapPtr pPix;
|
|
xFixed x1, x2;
|
|
|
|
if (!pScreenPriv->enabled ||
|
|
!pKaaScr->info->PrepareTrapezoids ||
|
|
pDst->pDrawable->type != DRAWABLE_PIXMAP ||
|
|
pDst->alphaMap || pDst->format != PICT_a8)
|
|
{
|
|
KdCheckRasterizeTrapezoid (pDst, trap, xoff, yoff);
|
|
#if KAA_DEBUG_FALLBACKS
|
|
kaaPrintTrapezoidFallback (pDst);
|
|
#endif
|
|
return;
|
|
}
|
|
pPix = (PixmapPtr)pDst->pDrawable;
|
|
|
|
kaaPixmapUseScreen (pPix);
|
|
|
|
if (!kaaPixmapIsOffscreen (pPix) ||
|
|
!(*pKaaScr->info->PrepareTrapezoids) (pDst, pPix))
|
|
{
|
|
#if KAA_DEBUG_FALLBACKS
|
|
kaaPrintTrapezoidFallback (pDst);
|
|
#endif
|
|
KdCheckRasterizeTrapezoid (pDst, trap, xoff, yoff);
|
|
return;
|
|
}
|
|
|
|
ktrap.ty = XFIXED_TO_FLOAT(trap->top) + yoff;
|
|
x1 = miLineFixedX (&trap->left, trap->top, FALSE);
|
|
x2 = miLineFixedX (&trap->right, trap->top, TRUE);
|
|
ktrap.tl = XFIXED_TO_FLOAT(x1) + xoff;
|
|
ktrap.tr = XFIXED_TO_FLOAT(x2) + xoff;
|
|
ktrap.by = XFIXED_TO_FLOAT(trap->bottom) + yoff;
|
|
x1 = miLineFixedX (&trap->left, trap->bottom, FALSE);
|
|
x2 = miLineFixedX (&trap->right, trap->bottom, TRUE);
|
|
ktrap.bl = XFIXED_TO_FLOAT(x1) + xoff;
|
|
ktrap.br = XFIXED_TO_FLOAT(x2) + xoff;
|
|
|
|
(*pKaaScr->info->Trapezoids) (&ktrap, 1);
|
|
(*pKaaScr->info->DoneTrapezoids) ();
|
|
}
|
|
|
|
void
|
|
kaaInitTrapOffsets(int grid_order, float *x_offsets, float *y_offsets,
|
|
float x_offset, float y_offset)
|
|
{
|
|
int i = 0;
|
|
float x, y, x_count, y_count;
|
|
|
|
x_count = (1 << (grid_order / 2)) + 1;
|
|
y_count = (1 << (grid_order / 2)) - 1;
|
|
|
|
x_offset += 1.0 / x_count / 2.0;
|
|
y_offset += 1.0 / y_count / 2.0;
|
|
|
|
for (x = 0; x < x_count; x++) {
|
|
for (y = 0; y < y_count; y++) {
|
|
x_offsets[i] = x / x_count + x_offset;
|
|
y_offsets[i] = y / y_count + y_offset;
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|