788ccb9a8b
The main consumer of trapezoids, cairo, is using the Trapezoids request, which is currently implemented in the miTrapezoids() function. That function splits the request into smaller bits and calls lower level functions such as AddTrap. By moving the implementation of the whole request into fb, we can instead call pixman_composite_trapezoids() to do the whole request in one step. There are no callers of miTrapezoids in any of the open source drivers, although exa and uxa have their own copies of the function. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Søren Sandmann <ssp@redhat.com>
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/*
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*
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* Copyright © 2002 Keith Packard, member of 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_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "scrnintstr.h"
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#include "gcstruct.h"
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#include "pixmapstr.h"
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#include "windowstr.h"
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#include "servermd.h"
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#include "mi.h"
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#include "picturestr.h"
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#include "mipict.h"
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PicturePtr
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miCreateAlphaPicture (ScreenPtr pScreen,
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PicturePtr pDst,
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PictFormatPtr pPictFormat,
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CARD16 width,
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CARD16 height)
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{
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PixmapPtr pPixmap;
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PicturePtr pPicture;
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GCPtr pGC;
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int error;
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xRectangle rect;
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if (width > 32767 || height > 32767)
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return 0;
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if (!pPictFormat)
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{
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if (pDst->polyEdge == PolyEdgeSharp)
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pPictFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
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else
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pPictFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
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if (!pPictFormat)
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return 0;
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}
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pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
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pPictFormat->depth, 0);
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if (!pPixmap)
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return 0;
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pGC = GetScratchGC (pPixmap->drawable.depth, pScreen);
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if (!pGC)
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{
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(*pScreen->DestroyPixmap) (pPixmap);
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return 0;
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}
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ValidateGC (&pPixmap->drawable, pGC);
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rect.x = 0;
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rect.y = 0;
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rect.width = width;
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rect.height = height;
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(*pGC->ops->PolyFillRect)(&pPixmap->drawable, pGC, 1, &rect);
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FreeScratchGC (pGC);
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pPicture = CreatePicture (0, &pPixmap->drawable, pPictFormat,
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0, 0, serverClient, &error);
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(*pScreen->DestroyPixmap) (pPixmap);
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return pPicture;
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}
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static xFixed
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miLineFixedX (xLineFixed *l, xFixed y, Bool ceil)
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{
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xFixed dx = l->p2.x - l->p1.x;
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xFixed_32_32 ex = (xFixed_32_32) (y - l->p1.y) * dx;
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xFixed dy = l->p2.y - l->p1.y;
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if (ceil)
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ex += (dy - 1);
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return l->p1.x + (xFixed) (ex / dy);
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}
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void
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miTrapezoidBounds (int ntrap, xTrapezoid *traps, BoxPtr box)
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{
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box->y1 = MAXSHORT;
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box->y2 = MINSHORT;
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box->x1 = MAXSHORT;
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box->x2 = MINSHORT;
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for (; ntrap; ntrap--, traps++)
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{
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INT16 x1, y1, x2, y2;
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if (!xTrapezoidValid(traps))
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continue;
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y1 = xFixedToInt (traps->top);
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if (y1 < box->y1)
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box->y1 = y1;
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y2 = xFixedToInt (xFixedCeil (traps->bottom));
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if (y2 > box->y2)
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box->y2 = y2;
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x1 = xFixedToInt (min (miLineFixedX (&traps->left, traps->top, FALSE),
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miLineFixedX (&traps->left, traps->bottom, FALSE)));
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if (x1 < box->x1)
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box->x1 = x1;
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x2 = xFixedToInt (xFixedCeil (max (miLineFixedX (&traps->right, traps->top, TRUE),
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miLineFixedX (&traps->right, traps->bottom, TRUE))));
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if (x2 > box->x2)
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box->x2 = x2;
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}
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}
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