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authorKaleb Keithley <kaleb@freedesktop.org>2003-11-14 16:48:57 +0000
committerKaleb Keithley <kaleb@freedesktop.org>2003-11-14 16:48:57 +0000
commit9508a382f8a9f241dab097d921b6d290c1c3a776 (patch)
treefa456480bae7040c3f971a70b390f2d091c680b5 /render/mitrap.c
parentded6147bfb5d75ff1e67c858040a628b61bc17d1 (diff)
Initial revision
Diffstat (limited to 'render/mitrap.c')
-rw-r--r--render/mitrap.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/render/mitrap.c b/render/mitrap.c
new file mode 100644
index 000000000..7f592ccd4
--- /dev/null
+++ b/render/mitrap.c
@@ -0,0 +1,196 @@
+/*
+ * $XFree86: xc/programs/Xserver/render/mitrap.c,v 1.9 2002/11/05 23:39:16 keithp Exp $
+ *
+ * Copyright 2002 Keith Packard, member of The XFree86 Project, Inc.
+ *
+ * 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.
+ */
+
+#include "scrnintstr.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "windowstr.h"
+#include "servermd.h"
+#include "mi.h"
+#include "picturestr.h"
+#include "mipict.h"
+
+PicturePtr
+miCreateAlphaPicture (ScreenPtr pScreen,
+ PicturePtr pDst,
+ PictFormatPtr pPictFormat,
+ CARD16 width,
+ CARD16 height)
+{
+ PixmapPtr pPixmap;
+ PicturePtr pPicture;
+ GCPtr pGC;
+ int error;
+ xRectangle rect;
+
+ if (width > 32767 || height > 32767)
+ return 0;
+
+ if (!pPictFormat)
+ {
+ if (pDst->polyEdge == PolyEdgeSharp)
+ pPictFormat = PictureMatchFormat (pScreen, 1, PICT_a1);
+ else
+ pPictFormat = PictureMatchFormat (pScreen, 8, PICT_a8);
+ if (!pPictFormat)
+ return 0;
+ }
+
+ pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+ pPictFormat->depth);
+ if (!pPixmap)
+ return 0;
+ pGC = GetScratchGC (pPixmap->drawable.depth, pScreen);
+ if (!pGC)
+ {
+ (*pScreen->DestroyPixmap) (pPixmap);
+ return 0;
+ }
+ ValidateGC (&pPixmap->drawable, pGC);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = width;
+ rect.height = height;
+ (*pGC->ops->PolyFillRect)(&pPixmap->drawable, pGC, 1, &rect);
+ FreeScratchGC (pGC);
+ pPicture = CreatePicture (0, &pPixmap->drawable, pPictFormat,
+ 0, 0, serverClient, &error);
+ (*pScreen->DestroyPixmap) (pPixmap);
+ return pPicture;
+}
+
+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);
+}
+
+void
+miTrapezoidBounds (int ntrap, xTrapezoid *traps, BoxPtr box)
+{
+ box->y1 = MAXSHORT;
+ box->y2 = MINSHORT;
+ box->x1 = MAXSHORT;
+ box->x2 = MINSHORT;
+ for (; ntrap; ntrap--, traps++)
+ {
+ INT16 x1, y1, x2, y2;
+
+ if (!xTrapezoidValid(traps))
+ continue;
+ y1 = xFixedToInt (traps->top);
+ if (y1 < box->y1)
+ box->y1 = y1;
+
+ y2 = xFixedToInt (xFixedCeil (traps->bottom));
+ if (y2 > box->y2)
+ box->y2 = y2;
+
+ x1 = xFixedToInt (min (miLineFixedX (&traps->left, traps->top, FALSE),
+ miLineFixedX (&traps->left, traps->bottom, FALSE)));
+ if (x1 < box->x1)
+ box->x1 = x1;
+
+ x2 = xFixedToInt (xFixedCeil (max (miLineFixedX (&traps->right, traps->top, TRUE),
+ miLineFixedX (&traps->right, traps->bottom, TRUE))));
+ if (x2 > box->x2)
+ box->x2 = x2;
+ }
+}
+
+void
+miTrapezoids (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int ntrap,
+ xTrapezoid *traps)
+{
+ ScreenPtr pScreen = pDst->pDrawable->pScreen;
+ PictureScreenPtr ps = GetPictureScreen(pScreen);
+ PicturePtr pPicture = 0;
+ BoxRec bounds;
+ INT16 xDst, yDst;
+ INT16 xRel, yRel;
+
+ xDst = traps[0].left.p1.x >> 16;
+ yDst = traps[0].left.p1.y >> 16;
+
+ if (maskFormat)
+ {
+ miTrapezoidBounds (ntrap, traps, &bounds);
+ if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
+ return;
+ pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ if (!pPicture)
+ return;
+ }
+ for (; ntrap; ntrap--, traps++)
+ {
+ if (!xTrapezoidValid(traps))
+ continue;
+ if (!maskFormat)
+ {
+ miTrapezoidBounds (1, traps, &bounds);
+ if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
+ continue;
+ pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ if (!pPicture)
+ continue;
+ }
+ (*ps->RasterizeTrapezoid) (pPicture, traps,
+ -bounds.x1, -bounds.y1);
+ if (!maskFormat)
+ {
+ xRel = bounds.x1 + xSrc - xDst;
+ yRel = bounds.y1 + ySrc - yDst;
+ CompositePicture (op, pSrc, pPicture, pDst,
+ xRel, yRel, 0, 0, bounds.x1, bounds.y1,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ FreePicture (pPicture, 0);
+ }
+ }
+ if (maskFormat)
+ {
+ xRel = bounds.x1 + xSrc - xDst;
+ yRel = bounds.y1 + ySrc - yDst;
+ CompositePicture (op, pSrc, pPicture, pDst,
+ xRel, yRel, 0, 0, bounds.x1, bounds.y1,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ FreePicture (pPicture, 0);
+ }
+}