--- /dev/null
+/*
+ * PROJECT: ReactOS win32 kernel mode subsystem
+ * LICENSE: GPL - See COPYING in the top level directory
+ * FILE: subsystems/win32/win32k/objects/path.c
+ * PURPOSE: Graphics paths (BeginPath, EndPath etc.)
+ * PROGRAMMER: Copyright 1997, 1998 Martin Boehme
+ * 1999 Huw D M Davies
+ * 2005 Dmitry Timoshkov
+ */
+
+#include <win32k.h>
+#include <suppress.h>
+
+#define NDEBUG
+#include <debug.h>
+
+#ifdef _MSC_VER
+#pragma warning(disable:4244)
+#endif
+
+#define NUM_ENTRIES_INITIAL 16 /* Initial size of points / flags arrays */
+#define GROW_FACTOR_NUMER 2 /* Numerator of grow factor for the array */
+#define GROW_FACTOR_DENOM 1 /* Denominator of grow factor */
+
+/***********************************************************************
+ * Internal functions
+ */
+
+/* PATH_DestroyGdiPath
+ *
+ * Destroys a GdiPath structure (frees the memory in the arrays).
+ */
+VOID
+FASTCALL
+PATH_DestroyGdiPath(PPATH pPath)
+{
+ ASSERT(pPath != NULL);
+
+ if (pPath->pPoints) ExFreePoolWithTag(pPath->pPoints, TAG_PATH);
+ if (pPath->pFlags) ExFreePoolWithTag(pPath->pFlags, TAG_PATH);
+}
+
+BOOL
+FASTCALL
+PATH_Delete(HPATH hPath)
+{
+ PPATH pPath;
+ if (!hPath) return FALSE;
+ pPath = PATH_LockPath(hPath);
+ if (!pPath) return FALSE;
+ PATH_DestroyGdiPath(pPath);
+ GDIOBJ_vDeleteObject(&pPath->BaseObject);
+ return TRUE;
+}
+
+
+VOID
+FASTCALL
+IntGdiCloseFigure(PPATH pPath)
+{
+ ASSERT(pPath->state == PATH_Open);
+
+ // FIXME: Shouldn't we draw a line to the beginning of the figure?
+ // Set PT_CLOSEFIGURE on the last entry and start a new stroke
+ if (pPath->numEntriesUsed)
+ {
+ pPath->pFlags[pPath->numEntriesUsed - 1] |= PT_CLOSEFIGURE;
+ pPath->newStroke = TRUE;
+ }
+}
+
+/* MSDN: This fails if the device coordinates exceed 27 bits, or if the converted
+ logical coordinates exceed 32 bits. */
+BOOL
+FASTCALL
+GdiPathDPtoLP(
+ PDC pdc,
+ PPOINT ppt,
+ INT count)
+{
+ XFORMOBJ xo;
+
+ XFORMOBJ_vInit(&xo, &pdc->pdcattr->mxDeviceToWorld);
+ return XFORMOBJ_bApplyXform(&xo, XF_LTOL, count, (PPOINTL)ppt, (PPOINTL)ppt);
+}
+
+/* PATH_FillPath
+ *
+ *
+ */
+BOOL
+FASTCALL
+PATH_FillPath(
+ PDC dc,
+ PPATH pPath)
+{
+ //INT mapMode, graphicsMode;
+ //SIZE ptViewportExt, ptWindowExt;
+ //POINTL ptViewportOrg, ptWindowOrg;
+ XFORM xform;
+ PREGION Rgn;
+ PDC_ATTR pdcattr = dc->pdcattr;
+
+ if (pPath->state != PATH_Closed)
+ {
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ return FALSE;
+ }
+
+ /* Allocate a temporary region */
+ Rgn = IntSysCreateRectpRgn(0, 0, 0, 0);
+ if (!Rgn)
+ {
+ EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ return FALSE;
+ }
+
+ if (!PATH_PathToRegion(pPath, pdcattr->jFillMode, Rgn))
+ {
+ /* EngSetLastError ? */
+ REGION_Delete(Rgn);
+ return FALSE;
+ }
+
+ /* Since PaintRgn interprets the region as being in logical coordinates
+ * but the points we store for the path are already in device
+ * coordinates, we have to set the mapping mode to MM_TEXT temporarily.
+ * Using SaveDC to save information about the mapping mode / world
+ * transform would be easier but would require more overhead, especially
+ * now that SaveDC saves the current path.
+ */
+
+ /* Save the information about the old mapping mode */
+ //mapMode = pdcattr->iMapMode;
+ //ptViewportExt = pdcattr->szlViewportExt;
+ //ptViewportOrg = pdcattr->ptlViewportOrg;
+ //ptWindowExt = pdcattr->szlWindowExt;
+ //ptWindowOrg = pdcattr->ptlWindowOrg;
+
+ /* Save world transform
+ * NB: The Windows documentation on world transforms would lead one to
+ * believe that this has to be done only in GM_ADVANCED; however, my
+ * tests show that resetting the graphics mode to GM_COMPATIBLE does
+ * not reset the world transform.
+ */
+ MatrixS2XForm(&xform, &dc->pdcattr->mxWorldToPage);
+
+ /* Set MM_TEXT */
+// IntGdiSetMapMode(dc, MM_TEXT);
+// pdcattr->ptlViewportOrg.x = 0;
+// pdcattr->ptlViewportOrg.y = 0;
+// pdcattr->ptlWindowOrg.x = 0;
+// pdcattr->ptlWindowOrg.y = 0;
+
+ // graphicsMode = pdcattr->iGraphicsMode;
+// pdcattr->iGraphicsMode = GM_ADVANCED;
+// IntGdiModifyWorldTransform(dc, &xform, MWT_IDENTITY);
+// pdcattr->iGraphicsMode = graphicsMode;
+
+ /* Paint the region */
+ IntGdiPaintRgn(dc, Rgn);
+ REGION_Delete(Rgn);
+ /* Restore the old mapping mode */
+// IntGdiSetMapMode(dc, mapMode);
+// pdcattr->szlViewportExt = ptViewportExt;
+// pdcattr->ptlViewportOrg = ptViewportOrg;
+// pdcattr->szlWindowExt = ptWindowExt;
+// pdcattr->ptlWindowOrg = ptWindowOrg;
+
+ /* Go to GM_ADVANCED temporarily to restore the world transform */
+ //graphicsMode = pdcattr->iGraphicsMode;
+// pdcattr->iGraphicsMode = GM_ADVANCED;
+// IntGdiModifyWorldTransform(dc, &xform, MWT_MAX+1);
+// pdcattr->iGraphicsMode = graphicsMode;
+ return TRUE;
+}
+
+/* PATH_InitGdiPath
+ *
+ * Initializes the GdiPath structure.
+ */
+VOID
+FASTCALL
+PATH_InitGdiPath(
+ PPATH pPath)
+{
+ ASSERT(pPath != NULL);
+
+ pPath->state = PATH_Null;
+ pPath->pPoints = NULL;
+ pPath->pFlags = NULL;
+ pPath->numEntriesUsed = 0;
+ pPath->numEntriesAllocated = 0;
+}
+
+/* PATH_AssignGdiPath
+ *
+ * Copies the GdiPath structure "pPathSrc" to "pPathDest". A deep copy is
+ * performed, i.e. the contents of the pPoints and pFlags arrays are copied,
+ * not just the pointers. Since this means that the arrays in pPathDest may
+ * need to be resized, pPathDest should have been initialized using
+ * PATH_InitGdiPath (in C++, this function would be an assignment operator,
+ * not a copy constructor).
+ * Returns TRUE if successful, else FALSE.
+ */
+BOOL
+FASTCALL
+PATH_AssignGdiPath(
+ PPATH pPathDest,
+ const PPATH pPathSrc)
+{
+ ASSERT(pPathDest != NULL && pPathSrc != NULL);
+
+ /* Make sure destination arrays are big enough */
+ if (!PATH_ReserveEntries(pPathDest, pPathSrc->numEntriesUsed))
+ return FALSE;
+
+ /* Perform the copy operation */
+ memcpy(pPathDest->pPoints, pPathSrc->pPoints,
+ sizeof(POINT)*pPathSrc->numEntriesUsed);
+ memcpy(pPathDest->pFlags, pPathSrc->pFlags,
+ sizeof(BYTE)*pPathSrc->numEntriesUsed);
+
+ pPathDest->state = pPathSrc->state;
+ pPathDest->numEntriesUsed = pPathSrc->numEntriesUsed;
+ pPathDest->newStroke = pPathSrc->newStroke;
+ return TRUE;
+}
+
+/* PATH_MoveTo
+ *
+ * Should be called when a MoveTo is performed on a DC that has an
+ * open path. This starts a new stroke. Returns TRUE if successful, else
+ * FALSE.
+ */
+BOOL
+FASTCALL
+PATH_MoveTo(
+ PDC dc)
+{
+ PPATH pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ /* FIXME: Do we have to call SetLastError? */
+ return FALSE;
+ }
+ /* Start a new stroke */
+ pPath->newStroke = TRUE;
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+/* PATH_LineTo
+ *
+ * Should be called when a LineTo is performed on a DC that has an
+ * open path. This adds a PT_LINETO entry to the path (and possibly
+ * a PT_MOVETO entry, if this is the first LineTo in a stroke).
+ * Returns TRUE if successful, else FALSE.
+ */
+BOOL
+FASTCALL
+PATH_LineTo(
+ PDC dc,
+ INT x,
+ INT y)
+{
+ BOOL Ret;
+ PPATH pPath;
+ POINT point, pointCurPos;
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ /* Convert point to device coordinates */
+ point.x = x;
+ point.y = y;
+ CoordLPtoDP(dc, &point);
+
+ /* Add a PT_MOVETO if necessary */
+ if (pPath->newStroke)
+ {
+ pPath->newStroke = FALSE;
+ IntGetCurrentPositionEx(dc, &pointCurPos);
+ CoordLPtoDP(dc, &pointCurPos);
+ if (!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ }
+
+ /* Add a PT_LINETO entry */
+ Ret = PATH_AddEntry(pPath, &point, PT_LINETO);
+ PATH_UnlockPath(pPath);
+ return Ret;
+}
+
+/* PATH_Rectangle
+ *
+ * Should be called when a call to Rectangle is performed on a DC that has
+ * an open path. Returns TRUE if successful, else FALSE.
+ */
+BOOL
+FASTCALL
+PATH_Rectangle(
+ PDC dc,
+ INT x1,
+ INT y1,
+ INT x2,
+ INT y2)
+{
+ PPATH pPath;
+ POINT corners[2], pointTemp;
+ INT temp;
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ /* Convert points to device coordinates */
+ corners[0].x = x1;
+ corners[0].y = y1;
+ corners[1].x = x2;
+ corners[1].y = y2;
+ IntLPtoDP(dc, corners, 2);
+
+ /* Make sure first corner is top left and second corner is bottom right */
+ if (corners[0].x > corners[1].x)
+ {
+ temp = corners[0].x;
+ corners[0].x = corners[1].x;
+ corners[1].x = temp;
+ }
+ if (corners[0].y > corners[1].y)
+ {
+ temp = corners[0].y;
+ corners[0].y = corners[1].y;
+ corners[1].y = temp;
+ }
+
+ /* In GM_COMPATIBLE, don't include bottom and right edges */
+ if (dc->pdcattr->iGraphicsMode == GM_COMPATIBLE)
+ {
+ corners[1].x--;
+ corners[1].y--;
+ }
+
+ /* Close any previous figure */
+ IntGdiCloseFigure(pPath);
+
+ /* Add four points to the path */
+ pointTemp.x = corners[1].x;
+ pointTemp.y = corners[0].y;
+ if (!PATH_AddEntry(pPath, &pointTemp, PT_MOVETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ if (!PATH_AddEntry(pPath, corners, PT_LINETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ pointTemp.x = corners[0].x;
+ pointTemp.y = corners[1].y;
+ if (!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ if (!PATH_AddEntry(pPath, corners + 1, PT_LINETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ /* Close the rectangle figure */
+ IntGdiCloseFigure(pPath) ;
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+/* PATH_RoundRect
+ *
+ * Should be called when a call to RoundRect is performed on a DC that has
+ * an open path. Returns TRUE if successful, else FALSE.
+ *
+ * FIXME: It adds the same entries to the path as windows does, but there
+ * is an error in the bezier drawing code so that there are small pixel-size
+ * gaps when the resulting path is drawn by StrokePath()
+ */
+BOOL
+FASTCALL
+PATH_RoundRect(
+ DC *dc,
+ INT x1,
+ INT y1,
+ INT x2,
+ INT y2,
+ INT ell_width,
+ INT ell_height)
+{
+ PPATH pPath;
+ POINT corners[2], pointTemp;
+ FLOAT_POINT ellCorners[2];
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ if (!PATH_CheckCorners(dc, corners, x1, y1, x2, y2))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ /* Add points to the roundrect path */
+ ellCorners[0].x = corners[1].x - ell_width;
+ ellCorners[0].y = corners[0].y;
+ ellCorners[1].x = corners[1].x;
+ ellCorners[1].y = corners[0].y + ell_height;
+ if (!PATH_DoArcPart(pPath, ellCorners, 0, -M_PI_2, PT_MOVETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ pointTemp.x = corners[0].x + ell_width / 2;
+ pointTemp.y = corners[0].y;
+ if (!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ ellCorners[0].x = corners[0].x;
+ ellCorners[1].x = corners[0].x + ell_width;
+ if (!PATH_DoArcPart(pPath, ellCorners, -M_PI_2, -M_PI, FALSE))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ pointTemp.x = corners[0].x;
+ pointTemp.y = corners[1].y - ell_height / 2;
+ if (!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ ellCorners[0].y = corners[1].y - ell_height;
+ ellCorners[1].y = corners[1].y;
+ if (!PATH_DoArcPart(pPath, ellCorners, M_PI, M_PI_2, FALSE))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ pointTemp.x = corners[1].x - ell_width / 2;
+ pointTemp.y = corners[1].y;
+ if (!PATH_AddEntry(pPath, &pointTemp, PT_LINETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ ellCorners[0].x = corners[1].x - ell_width;
+ ellCorners[1].x = corners[1].x;
+ if (!PATH_DoArcPart(pPath, ellCorners, M_PI_2, 0, FALSE))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ IntGdiCloseFigure(pPath);
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+/* PATH_Ellipse
+ *
+ * Should be called when a call to Ellipse is performed on a DC that has
+ * an open path. This adds four Bezier splines representing the ellipse
+ * to the path. Returns TRUE if successful, else FALSE.
+ */
+BOOL
+FASTCALL
+PATH_Ellipse(
+ PDC dc,
+ INT x1,
+ INT y1,
+ INT x2,
+ INT y2)
+{
+ PPATH pPath;
+ /* TODO: This should probably be revised to call PATH_AngleArc */
+ /* (once it exists) */
+ BOOL Ret = PATH_Arc(dc, x1, y1, x2, y2, x1, (y1 + y2) / 2, x1, (y1 + y2) / 2, GdiTypeArc);
+ if (Ret)
+ {
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+ IntGdiCloseFigure(pPath);
+ PATH_UnlockPath(pPath);
+ }
+ return Ret;
+}
+
+/* PATH_Arc
+ *
+ * Should be called when a call to Arc is performed on a DC that has
+ * an open path. This adds up to five Bezier splines representing the arc
+ * to the path. When 'lines' is 1, we add 1 extra line to get a chord,
+ * when 'lines' is 2, we add 2 extra lines to get a pie, and when 'lines' is
+ * -1 we add 1 extra line from the current DC position to the starting position
+ * of the arc before drawing the arc itself (arcto). Returns TRUE if successful,
+ * else FALSE.
+ */
+BOOL
+FASTCALL
+PATH_Arc(
+ PDC dc,
+ INT x1,
+ INT y1,
+ INT x2,
+ INT y2,
+ INT xStart,
+ INT yStart,
+ INT xEnd,
+ INT yEnd,
+ INT lines)
+{
+ double angleStart, angleEnd, angleStartQuadrant, angleEndQuadrant = 0.0;
+ /* Initialize angleEndQuadrant to silence gcc's warning */
+ double x, y;
+ FLOAT_POINT corners[2], pointStart, pointEnd;
+ POINT centre, pointCurPos;
+ BOOL start, end, Ret = TRUE;
+ INT temp;
+ BOOL clockwise;
+ PPATH pPath;
+
+ /* FIXME: This function should check for all possible error returns */
+ /* FIXME: Do we have to respect newStroke? */
+
+ ASSERT(dc);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ clockwise = ((dc->dclevel.flPath & DCPATH_CLOCKWISE) != 0);
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ Ret = FALSE;
+ goto ArcExit;
+ }
+
+ /* Check for zero height / width */
+ /* FIXME: Only in GM_COMPATIBLE? */
+ if (x1 == x2 || y1 == y2)
+ {
+ Ret = TRUE;
+ goto ArcExit;
+ }
+ /* Convert points to device coordinates */
+ corners[0].x = (FLOAT)x1;
+ corners[0].y = (FLOAT)y1;
+ corners[1].x = (FLOAT)x2;
+ corners[1].y = (FLOAT)y2;
+ pointStart.x = (FLOAT)xStart;
+ pointStart.y = (FLOAT)yStart;
+ pointEnd.x = (FLOAT)xEnd;
+ pointEnd.y = (FLOAT)yEnd;
+ INTERNAL_LPTODP_FLOAT(dc, corners);
+ INTERNAL_LPTODP_FLOAT(dc, corners + 1);
+ INTERNAL_LPTODP_FLOAT(dc, &pointStart);
+ INTERNAL_LPTODP_FLOAT(dc, &pointEnd);
+
+ /* Make sure first corner is top left and second corner is bottom right */
+ if (corners[0].x > corners[1].x)
+ {
+ temp = corners[0].x;
+ corners[0].x = corners[1].x;
+ corners[1].x = temp;
+ }
+ if (corners[0].y > corners[1].y)
+ {
+ temp = corners[0].y;
+ corners[0].y = corners[1].y;
+ corners[1].y = temp;
+ }
+
+ /* Compute start and end angle */
+ PATH_NormalizePoint(corners, &pointStart, &x, &y);
+ angleStart = atan2(y, x);
+ PATH_NormalizePoint(corners, &pointEnd, &x, &y);
+ angleEnd = atan2(y, x);
+
+ /* Make sure the end angle is "on the right side" of the start angle */
+ if (clockwise)
+ {
+ if (angleEnd <= angleStart)
+ {
+ angleEnd += 2 * M_PI;
+ ASSERT(angleEnd >= angleStart);
+ }
+ }
+ else
+ {
+ if (angleEnd >= angleStart)
+ {
+ angleEnd -= 2 * M_PI;
+ ASSERT(angleEnd <= angleStart);
+ }
+ }
+
+ /* In GM_COMPATIBLE, don't include bottom and right edges */
+ if (dc->pdcattr->iGraphicsMode == GM_COMPATIBLE)
+ {
+ corners[1].x--;
+ corners[1].y--;
+ }
+
+ /* arcto: Add a PT_MOVETO only if this is the first entry in a stroke */
+ if (lines == GdiTypeArcTo && pPath->newStroke) // -1
+ {
+ pPath->newStroke = FALSE;
+ IntGetCurrentPositionEx(dc, &pointCurPos);
+ CoordLPtoDP(dc, &pointCurPos);
+ if (!PATH_AddEntry(pPath, &pointCurPos, PT_MOVETO))
+ {
+ Ret = FALSE;
+ goto ArcExit;
+ }
+ }
+
+ /* Add the arc to the path with one Bezier spline per quadrant that the
+ * arc spans */
+ start = TRUE;
+ end = FALSE;
+ do
+ {
+ /* Determine the start and end angles for this quadrant */
+ if (start)
+ {
+ angleStartQuadrant = angleStart;
+ if (clockwise)
+ angleEndQuadrant = (floor(angleStart / M_PI_2) + 1.0) * M_PI_2;
+ else
+ angleEndQuadrant = (ceil(angleStart / M_PI_2) - 1.0) * M_PI_2;
+ }
+ else
+ {
+ angleStartQuadrant = angleEndQuadrant;
+ if (clockwise)
+ angleEndQuadrant += M_PI_2;
+ else
+ angleEndQuadrant -= M_PI_2;
+ }
+
+ /* Have we reached the last part of the arc? */
+ if ((clockwise && angleEnd < angleEndQuadrant) ||
+ (!clockwise && angleEnd > angleEndQuadrant))
+ {
+ /* Adjust the end angle for this quadrant */
+ angleEndQuadrant = angleEnd;
+ end = TRUE;
+ }
+
+ /* Add the Bezier spline to the path */
+ PATH_DoArcPart(pPath,
+ corners,
+ angleStartQuadrant,
+ angleEndQuadrant,
+ start ? (lines == GdiTypeArcTo ? PT_LINETO : PT_MOVETO) : FALSE); // -1
+ start = FALSE;
+ }
+ while (!end);
+
+ /* chord: close figure. pie: add line and close figure */
+ if (lines == GdiTypeChord) // 1
+ {
+ IntGdiCloseFigure(pPath);
+ }
+ else if (lines == GdiTypePie) // 2
+ {
+ centre.x = (corners[0].x + corners[1].x) / 2;
+ centre.y = (corners[0].y + corners[1].y) / 2;
+ if (!PATH_AddEntry(pPath, ¢re, PT_LINETO | PT_CLOSEFIGURE))
+ Ret = FALSE;
+ }
+ArcExit:
+ PATH_UnlockPath(pPath);
+ return Ret;
+}
+
+BOOL
+FASTCALL
+PATH_PolyBezierTo(
+ PDC dc,
+ const POINT *pts,
+ DWORD cbPoints)
+{
+ POINT pt;
+ ULONG i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+ ASSERT(cbPoints);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ /* Add a PT_MOVETO if necessary */
+ if (pPath->newStroke)
+ {
+ pPath->newStroke = FALSE;
+ IntGetCurrentPositionEx(dc, &pt);
+ CoordLPtoDP(dc, &pt);
+ if (!PATH_AddEntry(pPath, &pt, PT_MOVETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ }
+
+ for (i = 0; i < cbPoints; i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ PATH_AddEntry(pPath, &pt, PT_BEZIERTO);
+ }
+
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+BOOL
+FASTCALL
+PATH_PolyBezier(
+ PDC dc,
+ const POINT *pts,
+ DWORD cbPoints)
+{
+ POINT pt;
+ ULONG i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+ ASSERT(cbPoints);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ for (i = 0; i < cbPoints; i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO : PT_BEZIERTO);
+ }
+
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+BOOL
+FASTCALL
+PATH_PolyDraw(
+ PDC dc,
+ const POINT *pts,
+ const BYTE *types,
+ DWORD cbPoints)
+{
+ PPATH pPath;
+ POINT lastmove, orig_pos;
+ ULONG i;
+ PDC_ATTR pdcattr;
+ BOOL State = FALSE, Ret = FALSE;
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ pdcattr = dc->pdcattr;
+
+ lastmove.x = orig_pos.x = pdcattr->ptlCurrent.x;
+ lastmove.y = orig_pos.y = pdcattr->ptlCurrent.y;
+
+ i = pPath->numEntriesUsed;
+
+ while (i != 0)
+ {
+ i--;
+ if (pPath->pFlags[i] == PT_MOVETO)
+ {
+ lastmove.x = pPath->pPoints[i].x;
+ lastmove.y = pPath->pPoints[i].y;
+ if (!GdiPathDPtoLP(dc, &lastmove, 1))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ break;
+ }
+ }
+
+ for (i = 0; i < cbPoints; i++)
+ {
+ if (types[i] == PT_MOVETO)
+ {
+ pPath->newStroke = TRUE;
+ lastmove.x = pts[i].x;
+ lastmove.y = pts[i].y;
+ }
+ else if ((types[i] & ~PT_CLOSEFIGURE) == PT_LINETO)
+ {
+ PATH_LineTo(dc, pts[i].x, pts[i].y);
+ }
+ else if (types[i] == PT_BEZIERTO)
+ {
+ if (!((i + 2 < cbPoints) && (types[i + 1] == PT_BEZIERTO)
+ && ((types[i + 2] & ~PT_CLOSEFIGURE) == PT_BEZIERTO)))
+ goto err;
+ PATH_PolyBezierTo(dc, &(pts[i]), 3);
+ i += 2;
+ }
+ else
+ goto err;
+
+ pdcattr->ptlCurrent.x = pts[i].x;
+ pdcattr->ptlCurrent.y = pts[i].y;
+ State = TRUE;
+
+ if (types[i] & PT_CLOSEFIGURE)
+ {
+ pPath->pFlags[pPath->numEntriesUsed - 1] |= PT_CLOSEFIGURE;
+ pPath->newStroke = TRUE;
+ pdcattr->ptlCurrent.x = lastmove.x;
+ pdcattr->ptlCurrent.y = lastmove.y;
+ State = TRUE;
+ }
+ }
+ Ret = TRUE;
+ goto Exit;
+
+err:
+ if ((pdcattr->ptlCurrent.x != orig_pos.x) || (pdcattr->ptlCurrent.y != orig_pos.y))
+ {
+ pPath->newStroke = TRUE;
+ pdcattr->ptlCurrent.x = orig_pos.x;
+ pdcattr->ptlCurrent.y = orig_pos.y;
+ State = TRUE;
+ }
+Exit:
+ if (State) // State change?
+ {
+ pdcattr->ptfxCurrent = pdcattr->ptlCurrent;
+ CoordLPtoDP(dc, &pdcattr->ptfxCurrent); // Update fx
+ pdcattr->ulDirty_ &= ~(DIRTY_PTLCURRENT | DIRTY_PTFXCURRENT | DIRTY_STYLESTATE);
+ }
+ PATH_UnlockPath(pPath);
+ return Ret;
+}
+
+BOOL
+FASTCALL
+PATH_Polyline(
+ PDC dc,
+ const POINT *pts,
+ DWORD cbPoints)
+{
+ POINT pt;
+ ULONG i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+ ASSERT(cbPoints);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ for (i = 0; i < cbPoints; i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO : PT_LINETO);
+ }
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+BOOL
+FASTCALL
+PATH_PolylineTo(
+ PDC dc,
+ const POINT *pts,
+ DWORD cbPoints)
+{
+ POINT pt;
+ ULONG i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+ ASSERT(cbPoints);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ /* Add a PT_MOVETO if necessary */
+ if (pPath->newStroke)
+ {
+ pPath->newStroke = FALSE;
+ IntGetCurrentPositionEx(dc, &pt);
+ CoordLPtoDP(dc, &pt);
+ if (!PATH_AddEntry(pPath, &pt, PT_MOVETO))
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+ }
+
+ for (i = 0; i < cbPoints; i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ PATH_AddEntry(pPath, &pt, PT_LINETO);
+ }
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+
+BOOL
+FASTCALL
+PATH_Polygon(
+ PDC dc,
+ const POINT *pts,
+ DWORD cbPoints)
+{
+ POINT pt;
+ ULONG i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ for (i = 0; i < cbPoints; i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ PATH_AddEntry(pPath, &pt, (i == 0) ? PT_MOVETO :
+ ((i == cbPoints - 1) ? PT_LINETO | PT_CLOSEFIGURE :
+ PT_LINETO));
+ }
+
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+BOOL
+FASTCALL
+PATH_PolyPolygon(
+ PDC dc,
+ const POINT* pts,
+ const INT* counts,
+ UINT polygons)
+{
+ POINT pt, startpt;
+ ULONG poly, point, i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+ ASSERT(counts);
+ ASSERT(polygons);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ for (i = 0, poly = 0; poly < polygons; poly++)
+ {
+ for (point = 0; point < (ULONG) counts[poly]; point++, i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ if (point == 0) startpt = pt;
+ PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
+ }
+
+ /* Win98 adds an extra line to close the figure for some reason */
+ PATH_AddEntry(pPath, &startpt, PT_LINETO | PT_CLOSEFIGURE);
+ }
+
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+BOOL
+FASTCALL
+PATH_PolyPolyline(
+ PDC dc,
+ const POINT* pts,
+ const DWORD* counts,
+ DWORD polylines)
+{
+ POINT pt;
+ ULONG poly, point, i;
+ PPATH pPath;
+
+ ASSERT(dc);
+ ASSERT(pts);
+ ASSERT(counts);
+ ASSERT(polylines);
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ for (i = 0, poly = 0; poly < polylines; poly++)
+ {
+ for (point = 0; point < counts[poly]; point++, i++)
+ {
+ pt = pts[i];
+ CoordLPtoDP(dc, &pt);
+ PATH_AddEntry(pPath, &pt, (point == 0) ? PT_MOVETO : PT_LINETO);
+ }
+ }
+
+ PATH_UnlockPath(pPath);
+ return TRUE;
+}
+
+
+/* PATH_CheckCorners
+ *
+ * Helper function for PATH_RoundRect() and PATH_Rectangle()
+ */
+BOOL
+PATH_CheckCorners(
+ DC *dc,
+ POINT corners[],
+ INT x1,
+ INT y1,
+ INT x2,
+ INT y2)
+{
+ INT temp;
+ PDC_ATTR pdcattr = dc->pdcattr;
+
+ /* Convert points to device coordinates */
+ corners[0].x = x1;
+ corners[0].y = y1;
+ corners[1].x = x2;
+ corners[1].y = y2;
+ CoordLPtoDP(dc, &corners[0]);
+ CoordLPtoDP(dc, &corners[1]);
+
+ /* Make sure first corner is top left and second corner is bottom right */
+ if (corners[0].x > corners[1].x)
+ {
+ temp = corners[0].x;
+ corners[0].x = corners[1].x;
+ corners[1].x = temp;
+ }
+
+ if (corners[0].y > corners[1].y)
+ {
+ temp = corners[0].y;
+ corners[0].y = corners[1].y;
+ corners[1].y = temp;
+ }
+
+ /* In GM_COMPATIBLE, don't include bottom and right edges */
+ if (pdcattr->iGraphicsMode == GM_COMPATIBLE)
+ {
+ corners[1].x--;
+ corners[1].y--;
+ }
+
+ return TRUE;
+}
+
+
+/* PATH_AddFlatBezier
+ *
+ */
+BOOL
+FASTCALL
+PATH_AddFlatBezier(
+ PPATH pPath,
+ POINT *pt,
+ BOOL closed)
+{
+ POINT *pts;
+ INT no, i;
+
+ pts = GDI_Bezier(pt, 4, &no);
+ if (!pts) return FALSE;
+
+ for (i = 1; i < no; i++)
+ PATH_AddEntry(pPath, &pts[i], (i == no - 1 && closed) ? PT_LINETO | PT_CLOSEFIGURE : PT_LINETO);
+
+ ExFreePoolWithTag(pts, TAG_BEZIER);
+ return TRUE;
+}
+
+/* PATH_FlattenPath
+ *
+ * Replaces Beziers with line segments
+ *
+ */
+BOOL
+FASTCALL
+PATH_FlattenPath(PPATH pPath)
+{
+ PATH newPath;
+ INT srcpt;
+
+ RtlZeroMemory(&newPath, sizeof(newPath));
+ newPath.state = PATH_Open;
+ for (srcpt = 0; srcpt < pPath->numEntriesUsed; srcpt++)
+ {
+ switch(pPath->pFlags[srcpt] & ~PT_CLOSEFIGURE)
+ {
+ case PT_MOVETO:
+ case PT_LINETO:
+ PATH_AddEntry(&newPath, &pPath->pPoints[srcpt], pPath->pFlags[srcpt]);
+ break;
+ case PT_BEZIERTO:
+ PATH_AddFlatBezier(&newPath, &pPath->pPoints[srcpt - 1], pPath->pFlags[srcpt + 2] & PT_CLOSEFIGURE);
+ srcpt += 2;
+ break;
+ }
+ }
+
+ newPath.state = PATH_Closed;
+ PATH_AssignGdiPath(pPath, &newPath);
+ PATH_EmptyPath(&newPath);
+ return TRUE;
+}
+
+
+/* PATH_PathToRegion
+ *
+ * Creates a region from the specified path using the specified polygon
+ * filling mode. The path is left unchanged. A handle to the region that
+ * was created is stored in *pHrgn. If successful, TRUE is returned; if an
+ * error occurs, SetLastError is called with the appropriate value and
+ * FALSE is returned.
+ */
+BOOL
+FASTCALL
+PATH_PathToRegion(
+ PPATH pPath,
+ INT nPolyFillMode,
+ PREGION Rgn)
+{
+ int numStrokes, iStroke, i;
+ PULONG pNumPointsInStroke;
+ BOOL Ret;
+
+ ASSERT(pPath != NULL);
+ ASSERT(Rgn != NULL);
+
+ PATH_FlattenPath(pPath);
+
+ /* First pass: Find out how many strokes there are in the path */
+ /* FIXME: We could eliminate this with some bookkeeping in GdiPath */
+ numStrokes = 0;
+ for (i = 0; i < pPath->numEntriesUsed; i++)
+ if ((pPath->pFlags[i] & ~PT_CLOSEFIGURE) == PT_MOVETO)
+ numStrokes++;
+
+ if (numStrokes == 0)
+ {
+ return FALSE;
+ }
+
+ /* Allocate memory for number-of-points-in-stroke array */
+ pNumPointsInStroke = ExAllocatePoolWithTag(PagedPool, sizeof(ULONG) * numStrokes, TAG_PATH);
+ if (!pNumPointsInStroke)
+ {
+ EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ return FALSE;
+ }
+
+ /* Second pass: remember number of points in each polygon */
+ iStroke = -1; /* Will get incremented to 0 at beginning of first stroke */
+ for (i = 0; i < pPath->numEntriesUsed; i++)
+ {
+ /* Is this the beginning of a new stroke? */
+ if ((pPath->pFlags[i] & ~PT_CLOSEFIGURE) == PT_MOVETO)
+ {
+ iStroke++;
+ _PRAGMA_WARNING_SUPPRESS(__WARNING_WRITE_OVERRUN)
+ pNumPointsInStroke[iStroke] = 0;
+ }
+
+ _PRAGMA_WARNING_SUPPRESS(__WARNING_READ_OVERRUN)
+ pNumPointsInStroke[iStroke]++;
+ }
+
+ /* Fill the region with the strokes */
+ Ret = REGION_SetPolyPolygonRgn(Rgn,
+ pPath->pPoints,
+ pNumPointsInStroke,
+ numStrokes,
+ nPolyFillMode);
+
+ /* Free memory for number-of-points-in-stroke array */
+ ExFreePoolWithTag(pNumPointsInStroke, TAG_PATH);
+
+ /* Success! */
+ return Ret;
+}
+
+/* PATH_EmptyPath
+ *
+ * Removes all entries from the path and sets the path state to PATH_Null.
+ */
+VOID
+FASTCALL
+PATH_EmptyPath(PPATH pPath)
+{
+ ASSERT(pPath != NULL);
+
+ pPath->state = PATH_Null;
+ pPath->numEntriesUsed = 0;
+}
+
+/* PATH_AddEntry
+ *
+ * Adds an entry to the path. For "flags", pass either PT_MOVETO, PT_LINETO
+ * or PT_BEZIERTO, optionally ORed with PT_CLOSEFIGURE. Returns TRUE if
+ * successful, FALSE otherwise (e.g. if not enough memory was available).
+ */
+BOOL
+FASTCALL
+PATH_AddEntry(
+ PPATH pPath,
+ const POINT *pPoint,
+ BYTE flags)
+{
+ ASSERT(pPath != NULL);
+
+ /* FIXME: If newStroke is true, perhaps we want to check that we're
+ * getting a PT_MOVETO
+ */
+
+ /* Check that path is open */
+ if (pPath->state != PATH_Open)
+ return FALSE;
+
+ /* Reserve enough memory for an extra path entry */
+ if (!PATH_ReserveEntries(pPath, pPath->numEntriesUsed + 1))
+ return FALSE;
+
+ /* Store information in path entry */
+ pPath->pPoints[pPath->numEntriesUsed] = *pPoint;
+ pPath->pFlags[pPath->numEntriesUsed] = flags;
+
+ /* If this is PT_CLOSEFIGURE, we have to start a new stroke next time */
+ if ((flags & PT_CLOSEFIGURE) == PT_CLOSEFIGURE)
+ pPath->newStroke = TRUE;
+
+ /* Increment entry count */
+ pPath->numEntriesUsed++;
+
+ return TRUE;
+}
+
+/* PATH_ReserveEntries
+ *
+ * Ensures that at least "numEntries" entries (for points and flags) have
+ * been allocated; allocates larger arrays and copies the existing entries
+ * to those arrays, if necessary. Returns TRUE if successful, else FALSE.
+ */
+BOOL
+FASTCALL
+PATH_ReserveEntries(
+ PPATH pPath,
+ INT numEntries)
+{
+ INT numEntriesToAllocate;
+ POINT *pPointsNew;
+ BYTE *pFlagsNew;
+
+ ASSERT(pPath != NULL);
+ ASSERT(numEntries >= 0);
+
+ /* Do we have to allocate more memory? */
+ if (numEntries > pPath->numEntriesAllocated)
+ {
+ /* Find number of entries to allocate. We let the size of the array
+ * grow exponentially, since that will guarantee linear time
+ * complexity. */
+ if (pPath->numEntriesAllocated)
+ {
+ numEntriesToAllocate = pPath->numEntriesAllocated;
+ while (numEntriesToAllocate < numEntries)
+ numEntriesToAllocate = numEntriesToAllocate * GROW_FACTOR_NUMER / GROW_FACTOR_DENOM;
+ }
+ else
+ numEntriesToAllocate = numEntries;
+
+ /* Allocate new arrays */
+ pPointsNew = (POINT *)ExAllocatePoolWithTag(PagedPool, numEntriesToAllocate * sizeof(POINT), TAG_PATH);
+ if (!pPointsNew)
+ return FALSE;
+
+ pFlagsNew = (BYTE *)ExAllocatePoolWithTag(PagedPool, numEntriesToAllocate * sizeof(BYTE), TAG_PATH);
+ if (!pFlagsNew)
+ {
+ ExFreePoolWithTag(pPointsNew, TAG_PATH);
+ return FALSE;
+ }
+
+ /* Copy old arrays to new arrays and discard old arrays */
+ if (pPath->pPoints)
+ {
+ ASSERT(pPath->pFlags);
+
+ memcpy(pPointsNew, pPath->pPoints, sizeof(POINT)*pPath->numEntriesUsed);
+ memcpy(pFlagsNew, pPath->pFlags, sizeof(BYTE)*pPath->numEntriesUsed);
+
+ ExFreePoolWithTag(pPath->pPoints, TAG_PATH);
+ ExFreePoolWithTag(pPath->pFlags, TAG_PATH);
+ }
+
+ pPath->pPoints = pPointsNew;
+ pPath->pFlags = pFlagsNew;
+ pPath->numEntriesAllocated = numEntriesToAllocate;
+ }
+
+ return TRUE;
+}
+
+/* PATH_DoArcPart
+ *
+ * Creates a Bezier spline that corresponds to part of an arc and appends the
+ * corresponding points to the path. The start and end angles are passed in
+ * "angleStart" and "angleEnd"; these angles should span a quarter circle
+ * at most. If "startEntryType" is non-zero, an entry of that type for the first
+ * control point is added to the path; otherwise, it is assumed that the current
+ * position is equal to the first control point.
+ */
+BOOL
+FASTCALL
+PATH_DoArcPart(
+ PPATH pPath,
+ FLOAT_POINT corners[],
+ double angleStart,
+ double angleEnd,
+ BYTE startEntryType)
+{
+ double halfAngle, a;
+ double xNorm[4], yNorm[4];
+ POINT point;
+ int i;
+
+ ASSERT(fabs(angleEnd - angleStart) <= M_PI_2);
+
+ /* FIXME: Is there an easier way of computing this? */
+
+ /* Compute control points */
+ halfAngle = (angleEnd - angleStart) / 2.0;
+ if (fabs(halfAngle) > 1e-8)
+ {
+ a = 4.0 / 3.0 * (1 - cos(halfAngle)) / sin(halfAngle);
+ xNorm[0] = cos(angleStart);
+ yNorm[0] = sin(angleStart);
+ xNorm[1] = xNorm[0] - a * yNorm[0];
+ yNorm[1] = yNorm[0] + a * xNorm[0];
+ xNorm[3] = cos(angleEnd);
+ yNorm[3] = sin(angleEnd);
+ xNorm[2] = xNorm[3] + a * yNorm[3];
+ yNorm[2] = yNorm[3] - a * xNorm[3];
+ }
+ else
+ for (i = 0; i < 4; i++)
+ {
+ xNorm[i] = cos(angleStart);
+ yNorm[i] = sin(angleStart);
+ }
+
+ /* Add starting point to path if desired */
+ if (startEntryType)
+ {
+ PATH_ScaleNormalizedPoint(corners, xNorm[0], yNorm[0], &point);
+ if (!PATH_AddEntry(pPath, &point, startEntryType))
+ return FALSE;
+ }
+
+ /* Add remaining control points */
+ for (i = 1; i < 4; i++)
+ {
+ PATH_ScaleNormalizedPoint(corners, xNorm[i], yNorm[i], &point);
+ if (!PATH_AddEntry(pPath, &point, PT_BEZIERTO))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/* PATH_ScaleNormalizedPoint
+ *
+ * Scales a normalized point (x, y) with respect to the box whose corners are
+ * passed in "corners". The point is stored in "*pPoint". The normalized
+ * coordinates (-1.0, -1.0) correspond to corners[0], the coordinates
+ * (1.0, 1.0) correspond to corners[1].
+ */
+VOID
+FASTCALL
+PATH_ScaleNormalizedPoint(
+ FLOAT_POINT corners[],
+ double x,
+ double y,
+ POINT *pPoint)
+{
+ ASSERT(corners);
+ ASSERT(pPoint);
+
+ pPoint->x = GDI_ROUND((double)corners[0].x + (double)(corners[1].x - corners[0].x) * 0.5 * (x + 1.0));
+ pPoint->y = GDI_ROUND((double)corners[0].y + (double)(corners[1].y - corners[0].y) * 0.5 * (y + 1.0));
+}
+
+/* PATH_NormalizePoint
+ *
+ * Normalizes a point with respect to the box whose corners are passed in
+ * corners. The normalized coordinates are stored in *pX and *pY.
+ */
+VOID
+FASTCALL
+PATH_NormalizePoint(
+ FLOAT_POINT corners[],
+ const FLOAT_POINT *pPoint,
+ double *pX,
+ double *pY)
+{
+ ASSERT(corners);
+ ASSERT(pPoint);
+ ASSERT(pX);
+ ASSERT(pY);
+
+ *pX = (double)(pPoint->x - corners[0].x) / (double)(corners[1].x - corners[0].x) * 2.0 - 1.0;
+ *pY = (double)(pPoint->y - corners[0].y) / (double)(corners[1].y - corners[0].y) * 2.0 - 1.0;
+}
+
+
+BOOL
+FASTCALL
+PATH_StrokePath(
+ DC *dc,
+ PPATH pPath)
+{
+ BOOL ret = FALSE;
+ INT i = 0;
+ INT nLinePts, nAlloc;
+ POINT *pLinePts = NULL;
+ POINT ptViewportOrg, ptWindowOrg;
+ SIZE szViewportExt, szWindowExt;
+ DWORD mapMode, graphicsMode;
+ XFORM xform;
+ PDC_ATTR pdcattr = dc->pdcattr;
+
+ DPRINT("Enter %s\n", __FUNCTION__);
+
+ if (pPath->state != PATH_Closed)
+ return FALSE;
+
+ /* Save the mapping mode info */
+ mapMode = pdcattr->iMapMode;
+
+ szViewportExt = *DC_pszlViewportExt(dc);
+ ptViewportOrg = dc->pdcattr->ptlViewportOrg;
+ szWindowExt = dc->pdcattr->szlWindowExt;
+ ptWindowOrg = dc->pdcattr->ptlWindowOrg;
+
+ MatrixS2XForm(&xform, &dc->pdcattr->mxWorldToPage);
+
+ /* Set MM_TEXT */
+ pdcattr->iMapMode = MM_TEXT;
+ pdcattr->ptlViewportOrg.x = 0;
+ pdcattr->ptlViewportOrg.y = 0;
+ pdcattr->ptlWindowOrg.x = 0;
+ pdcattr->ptlWindowOrg.y = 0;
+ graphicsMode = pdcattr->iGraphicsMode;
+ pdcattr->iGraphicsMode = GM_ADVANCED;
+ GreModifyWorldTransform(dc, (XFORML*)&xform, MWT_IDENTITY);
+ pdcattr->iGraphicsMode = graphicsMode;
+
+ /* Allocate enough memory for the worst case without beziers (one PT_MOVETO
+ * and the rest PT_LINETO with PT_CLOSEFIGURE at the end) plus some buffer
+ * space in case we get one to keep the number of reallocations small. */
+ nAlloc = pPath->numEntriesUsed + 1 + 300;
+ pLinePts = ExAllocatePoolWithTag(PagedPool, nAlloc * sizeof(POINT), TAG_PATH);
+ if (!pLinePts)
+ {
+ DPRINT1("Can't allocate pool!\n");
+ EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ goto end;
+ }
+ nLinePts = 0;
+
+ for (i = 0; i < pPath->numEntriesUsed; i++)
+ {
+ if ((i == 0 || (pPath->pFlags[i - 1] & PT_CLOSEFIGURE))
+ && (pPath->pFlags[i] != PT_MOVETO))
+ {
+ DPRINT1("Expected PT_MOVETO %s, got path flag %d\n",
+ i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
+ (INT)pPath->pFlags[i]);
+ goto end;
+ }
+
+ switch(pPath->pFlags[i])
+ {
+ case PT_MOVETO:
+ DPRINT("Got PT_MOVETO (%ld, %ld)\n",
+ pPath->pPoints[i].x, pPath->pPoints[i].y);
+ if (nLinePts >= 2) IntGdiPolyline(dc, pLinePts, nLinePts);
+ nLinePts = 0;
+ pLinePts[nLinePts++] = pPath->pPoints[i];
+ break;
+ case PT_LINETO:
+ case (PT_LINETO | PT_CLOSEFIGURE):
+ DPRINT("Got PT_LINETO (%ld, %ld)\n",
+ pPath->pPoints[i].x, pPath->pPoints[i].y);
+ pLinePts[nLinePts++] = pPath->pPoints[i];
+ break;
+ case PT_BEZIERTO:
+ DPRINT("Got PT_BEZIERTO\n");
+ if (pPath->pFlags[i + 1] != PT_BEZIERTO ||
+ (pPath->pFlags[i + 2] & ~PT_CLOSEFIGURE) != PT_BEZIERTO)
+ {
+ DPRINT1("Path didn't contain 3 successive PT_BEZIERTOs\n");
+ ret = FALSE;
+ goto end;
+ }
+ else
+ {
+ INT nBzrPts, nMinAlloc;
+ POINT *pBzrPts = GDI_Bezier(&pPath->pPoints[i - 1], 4, &nBzrPts);
+ /* Make sure we have allocated enough memory for the lines of
+ * this bezier and the rest of the path, assuming we won't get
+ * another one (since we won't reallocate again then). */
+ nMinAlloc = nLinePts + (pPath->numEntriesUsed - i) + nBzrPts;
+ if (nAlloc < nMinAlloc)
+ {
+ // Reallocate memory
+
+ POINT *Realloc = NULL;
+ nAlloc = nMinAlloc * 2;
+
+ Realloc = ExAllocatePoolWithTag(PagedPool,
+ nAlloc * sizeof(POINT),
+ TAG_PATH);
+
+ if (!Realloc)
+ {
+ DPRINT1("Can't allocate pool!\n");
+ goto end;
+ }
+
+ memcpy(Realloc, pLinePts, nLinePts * sizeof(POINT));
+ ExFreePoolWithTag(pLinePts, TAG_PATH);
+ pLinePts = Realloc;
+ }
+ memcpy(&pLinePts[nLinePts], &pBzrPts[1], (nBzrPts - 1) * sizeof(POINT));
+ nLinePts += nBzrPts - 1;
+ ExFreePoolWithTag(pBzrPts, TAG_BEZIER);
+ i += 2;
+ }
+ break;
+ default:
+ DPRINT1("Got path flag %d (not supported)\n", (INT)pPath->pFlags[i]);
+ goto end;
+ }
+
+ if (pPath->pFlags[i] & PT_CLOSEFIGURE)
+ {
+ pLinePts[nLinePts++] = pLinePts[0];
+ }
+ }
+ if (nLinePts >= 2)
+ IntGdiPolyline(dc, pLinePts, nLinePts);
+
+ ret = TRUE;
+
+end:
+ if (pLinePts) ExFreePoolWithTag(pLinePts, TAG_PATH);
+
+ /* Restore the old mapping mode */
+ pdcattr->iMapMode = mapMode;
+ pdcattr->szlWindowExt.cx = szWindowExt.cx;
+ pdcattr->szlWindowExt.cy = szWindowExt.cy;
+ pdcattr->ptlWindowOrg.x = ptWindowOrg.x;
+ pdcattr->ptlWindowOrg.y = ptWindowOrg.y;
+
+ pdcattr->szlViewportExt.cx = szViewportExt.cx;
+ pdcattr->szlViewportExt.cy = szViewportExt.cy;
+ pdcattr->ptlViewportOrg.x = ptViewportOrg.x;
+ pdcattr->ptlViewportOrg.y = ptViewportOrg.y;
+
+ /* Restore the world transform */
+ XForm2MatrixS(&dc->pdcattr->mxWorldToPage, &xform);
+
+ /* If we've moved the current point then get its new position
+ which will be in device (MM_TEXT) co-ords, convert it to
+ logical co-ords and re-set it. This basically updates
+ dc->CurPosX|Y so that their values are in the correct mapping
+ mode.
+ */
+ if (i > 0)
+ {
+ POINT pt;
+ IntGetCurrentPositionEx(dc, &pt);
+ IntDPtoLP(dc, &pt, 1);
+ IntGdiMoveToEx(dc, pt.x, pt.y, NULL, FALSE);
+ }
+ DPRINT("Leave %s, ret=%d\n", __FUNCTION__, ret);
+ return ret;
+}
+
+#define round(x) ((int)((x)>0?(x)+0.5:(x)-0.5))
+
+static
+BOOL
+FASTCALL
+PATH_WidenPath(DC *dc)
+{
+ INT i, j, numStrokes, numOldStrokes, penWidth, penWidthIn, penWidthOut, size, penStyle;
+ BOOL ret = FALSE;
+ PPATH pPath, pNewPath, *pStrokes = NULL, *pOldStrokes, pUpPath, pDownPath;
+ EXTLOGPEN *elp;
+ DWORD obj_type, joint, endcap, penType;
+ PDC_ATTR pdcattr = dc->pdcattr;
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath) return FALSE;
+
+ if (pPath->state == PATH_Open)
+ {
+ PATH_UnlockPath(pPath);
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ return FALSE;
+ }
+
+ PATH_FlattenPath(pPath);
+
+ size = GreGetObject(pdcattr->hpen, 0, NULL);
+ if (!size)
+ {
+ PATH_UnlockPath(pPath);
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ return FALSE;
+ }
+
+ elp = ExAllocatePoolWithTag(PagedPool, size, TAG_PATH);
+ GreGetObject(pdcattr->hpen, size, elp);
+
+ obj_type = GDI_HANDLE_GET_TYPE(pdcattr->hpen);
+ if (obj_type == GDI_OBJECT_TYPE_PEN)
+ {
+ penStyle = ((LOGPEN*)elp)->lopnStyle;
+ }
+ else if (obj_type == GDI_OBJECT_TYPE_EXTPEN)
+ {
+ penStyle = elp->elpPenStyle;
+ }
+ else
+ {
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ ExFreePoolWithTag(elp, TAG_PATH);
+ PATH_UnlockPath(pPath);
+ return FALSE;
+ }
+
+ penWidth = elp->elpWidth;
+ ExFreePoolWithTag(elp, TAG_PATH);
+
+ endcap = (PS_ENDCAP_MASK & penStyle);
+ joint = (PS_JOIN_MASK & penStyle);
+ penType = (PS_TYPE_MASK & penStyle);
+
+ /* The function cannot apply to cosmetic pens */
+ if (obj_type == GDI_OBJECT_TYPE_EXTPEN && penType == PS_COSMETIC)
+ {
+ PATH_UnlockPath(pPath);
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ return FALSE;
+ }
+
+ penWidthIn = penWidth / 2;
+ penWidthOut = penWidth / 2;
+ if (penWidthIn + penWidthOut < penWidth)
+ penWidthOut++;
+
+ numStrokes = 0;
+
+ for (i = 0, j = 0; i < pPath->numEntriesUsed; i++, j++)
+ {
+ POINT point;
+ if ((i == 0 || (pPath->pFlags[i - 1] & PT_CLOSEFIGURE)) &&
+ (pPath->pFlags[i] != PT_MOVETO))
+ {
+ DPRINT1("Expected PT_MOVETO %s, got path flag %c\n",
+ i == 0 ? "as first point" : "after PT_CLOSEFIGURE",
+ pPath->pFlags[i]);
+ return FALSE;
+ }
+ switch(pPath->pFlags[i])
+ {
+ case PT_MOVETO:
+ if (numStrokes > 0)
+ {
+ pStrokes[numStrokes - 1]->state = PATH_Closed;
+ }
+ numOldStrokes = numStrokes;
+ numStrokes++;
+ j = 0;
+ if (numStrokes == 1)
+ pStrokes = ExAllocatePoolWithTag(PagedPool, numStrokes * sizeof(PPATH), TAG_PATH);
+ else
+ {
+ pOldStrokes = pStrokes; // Save old pointer.
+ pStrokes = ExAllocatePoolWithTag(PagedPool, numStrokes * sizeof(PPATH), TAG_PATH);
+ if (!pStrokes) return FALSE;
+ RtlCopyMemory(pStrokes, pOldStrokes, numOldStrokes * sizeof(PPATH));
+ ExFreePoolWithTag(pOldStrokes, TAG_PATH); // Free old pointer.
+ }
+ if (!pStrokes) return FALSE;
+ pStrokes[numStrokes - 1] = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
+ if (!pStrokes[numStrokes - 1])
+ {
+ ASSERT(FALSE); // FIXME
+ }
+
+ PATH_InitGdiPath(pStrokes[numStrokes - 1]);
+ pStrokes[numStrokes - 1]->state = PATH_Open;
+ case PT_LINETO:
+ case (PT_LINETO | PT_CLOSEFIGURE):
+ point.x = pPath->pPoints[i].x;
+ point.y = pPath->pPoints[i].y;
+ PATH_AddEntry(pStrokes[numStrokes - 1], &point, pPath->pFlags[i]);
+ break;
+ case PT_BEZIERTO:
+ /* Should never happen because of the FlattenPath call */
+ DPRINT1("Should never happen\n");
+ break;
+ default:
+ DPRINT1("Got path flag %c\n", pPath->pFlags[i]);
+ return FALSE;
+ }
+ }
+
+ pNewPath = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
+ if (!pNewPath)
+ {
+ ASSERT(FALSE); // FIXME
+ }
+ PATH_InitGdiPath(pNewPath);
+ pNewPath->state = PATH_Open;
+
+ for (i = 0; i < numStrokes; i++)
+ {
+ pUpPath = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
+ PATH_InitGdiPath(pUpPath);
+ pUpPath->state = PATH_Open;
+ pDownPath = ExAllocatePoolWithTag(PagedPool, sizeof(PATH), TAG_PATH);
+ PATH_InitGdiPath(pDownPath);
+ pDownPath->state = PATH_Open;
+
+ for (j = 0; j < pStrokes[i]->numEntriesUsed; j++)
+ {
+ /* Beginning or end of the path if not closed */
+ if ((!(pStrokes[i]->pFlags[pStrokes[i]->numEntriesUsed - 1] & PT_CLOSEFIGURE)) && (j == 0 || j == pStrokes[i]->numEntriesUsed - 1))
+ {
+ /* Compute segment angle */
+ double xo, yo, xa, ya, theta;
+ POINT pt;
+ FLOAT_POINT corners[2];
+ if (j == 0)
+ {
+ xo = pStrokes[i]->pPoints[j].x;
+ yo = pStrokes[i]->pPoints[j].y;
+ xa = pStrokes[i]->pPoints[1].x;
+ ya = pStrokes[i]->pPoints[1].y;
+ }
+ else
+ {
+ xa = pStrokes[i]->pPoints[j - 1].x;
+ ya = pStrokes[i]->pPoints[j - 1].y;
+ xo = pStrokes[i]->pPoints[j].x;
+ yo = pStrokes[i]->pPoints[j].y;
+ }
+ theta = atan2(ya - yo, xa - xo);
+ switch(endcap)
+ {
+ case PS_ENDCAP_SQUARE :
+ pt.x = xo + round(sqrt(2) * penWidthOut * cos(M_PI_4 + theta));
+ pt.y = yo + round(sqrt(2) * penWidthOut * sin(M_PI_4 + theta));
+ PATH_AddEntry(pUpPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
+ pt.x = xo + round(sqrt(2) * penWidthIn * cos(- M_PI_4 + theta));
+ pt.y = yo + round(sqrt(2) * penWidthIn * sin(- M_PI_4 + theta));
+ PATH_AddEntry(pUpPath, &pt, PT_LINETO);
+ break;
+ case PS_ENDCAP_FLAT :
+ pt.x = xo + round(penWidthOut * cos(theta + M_PI_2));
+ pt.y = yo + round(penWidthOut * sin(theta + M_PI_2));
+ PATH_AddEntry(pUpPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
+ pt.x = xo - round(penWidthIn * cos(theta + M_PI_2));
+ pt.y = yo - round(penWidthIn * sin(theta + M_PI_2));
+ PATH_AddEntry(pUpPath, &pt, PT_LINETO);
+ break;
+ case PS_ENDCAP_ROUND :
+ default :
+ corners[0].x = xo - penWidthIn;
+ corners[0].y = yo - penWidthIn;
+ corners[1].x = xo + penWidthOut;
+ corners[1].y = yo + penWidthOut;
+ PATH_DoArcPart(pUpPath , corners, theta + M_PI_2 , theta + 3 * M_PI_4, (j == 0 ? PT_MOVETO : FALSE));
+ PATH_DoArcPart(pUpPath , corners, theta + 3 * M_PI_4 , theta + M_PI, FALSE);
+ PATH_DoArcPart(pUpPath , corners, theta + M_PI, theta + 5 * M_PI_4, FALSE);
+ PATH_DoArcPart(pUpPath , corners, theta + 5 * M_PI_4 , theta + 3 * M_PI_2, FALSE);
+ break;
+ }
+ }
+ /* Corpse of the path */
+ else
+ {
+ /* Compute angle */
+ INT previous, next;
+ double xa, ya, xb, yb, xo, yo;
+ double alpha, theta, miterWidth;
+ DWORD _joint = joint;
+ POINT pt;
+ PPATH pInsidePath, pOutsidePath;
+ if (j > 0 && j < pStrokes[i]->numEntriesUsed - 1)
+ {
+ previous = j - 1;
+ next = j + 1;
+ }
+ else if (j == 0)
+ {
+ previous = pStrokes[i]->numEntriesUsed - 1;
+ next = j + 1;
+ }
+ else
+ {
+ previous = j - 1;
+ next = 0;
+ }
+ xo = pStrokes[i]->pPoints[j].x;
+ yo = pStrokes[i]->pPoints[j].y;
+ xa = pStrokes[i]->pPoints[previous].x;
+ ya = pStrokes[i]->pPoints[previous].y;
+ xb = pStrokes[i]->pPoints[next].x;
+ yb = pStrokes[i]->pPoints[next].y;
+ theta = atan2(yo - ya, xo - xa);
+ alpha = atan2(yb - yo, xb - xo) - theta;
+ if (alpha > 0) alpha -= M_PI;
+ else alpha += M_PI;
+ if (_joint == PS_JOIN_MITER && dc->dclevel.laPath.eMiterLimit < fabs(1 / sin(alpha / 2)))
+ {
+ _joint = PS_JOIN_BEVEL;
+ }
+ if (alpha > 0)
+ {
+ pInsidePath = pUpPath;
+ pOutsidePath = pDownPath;
+ }
+ else if (alpha < 0)
+ {
+ pInsidePath = pDownPath;
+ pOutsidePath = pUpPath;
+ }
+ else
+ {
+ continue;
+ }
+ /* Inside angle points */
+ if (alpha > 0)
+ {
+ pt.x = xo - round(penWidthIn * cos(theta + M_PI_2));
+ pt.y = yo - round(penWidthIn * sin(theta + M_PI_2));
+ }
+ else
+ {
+ pt.x = xo + round(penWidthIn * cos(theta + M_PI_2));
+ pt.y = yo + round(penWidthIn * sin(theta + M_PI_2));
+ }
+ PATH_AddEntry(pInsidePath, &pt, PT_LINETO);
+ if (alpha > 0)
+ {
+ pt.x = xo + round(penWidthIn * cos(M_PI_2 + alpha + theta));
+ pt.y = yo + round(penWidthIn * sin(M_PI_2 + alpha + theta));
+ }
+ else
+ {
+ pt.x = xo - round(penWidthIn * cos(M_PI_2 + alpha + theta));
+ pt.y = yo - round(penWidthIn * sin(M_PI_2 + alpha + theta));
+ }
+ PATH_AddEntry(pInsidePath, &pt, PT_LINETO);
+ /* Outside angle point */
+ switch(_joint)
+ {
+ case PS_JOIN_MITER :
+ miterWidth = fabs(penWidthOut / cos(M_PI_2 - fabs(alpha) / 2));
+ pt.x = xo + round(miterWidth * cos(theta + alpha / 2));
+ pt.y = yo + round(miterWidth * sin(theta + alpha / 2));
+ PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
+ break;
+ case PS_JOIN_BEVEL :
+ if (alpha > 0)
+ {
+ pt.x = xo + round(penWidthOut * cos(theta + M_PI_2));
+ pt.y = yo + round(penWidthOut * sin(theta + M_PI_2));
+ }
+ else
+ {
+ pt.x = xo - round(penWidthOut * cos(theta + M_PI_2));
+ pt.y = yo - round(penWidthOut * sin(theta + M_PI_2));
+ }
+ PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
+ if (alpha > 0)
+ {
+ pt.x = xo - round(penWidthOut * cos(M_PI_2 + alpha + theta));
+ pt.y = yo - round(penWidthOut * sin(M_PI_2 + alpha + theta));
+ }
+ else
+ {
+ pt.x = xo + round(penWidthOut * cos(M_PI_2 + alpha + theta));
+ pt.y = yo + round(penWidthOut * sin(M_PI_2 + alpha + theta));
+ }
+ PATH_AddEntry(pOutsidePath, &pt, PT_LINETO);
+ break;
+ case PS_JOIN_ROUND :
+ default :
+ if (alpha > 0)
+ {
+ pt.x = xo + round(penWidthOut * cos(theta + M_PI_2));
+ pt.y = yo + round(penWidthOut * sin(theta + M_PI_2));
+ }
+ else
+ {
+ pt.x = xo - round(penWidthOut * cos(theta + M_PI_2));
+ pt.y = yo - round(penWidthOut * sin(theta + M_PI_2));
+ }
+ PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
+ pt.x = xo + round(penWidthOut * cos(theta + alpha / 2));
+ pt.y = yo + round(penWidthOut * sin(theta + alpha / 2));
+ PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
+ if (alpha > 0)
+ {
+ pt.x = xo - round(penWidthOut * cos(M_PI_2 + alpha + theta));
+ pt.y = yo - round(penWidthOut * sin(M_PI_2 + alpha + theta));
+ }
+ else
+ {
+ pt.x = xo + round(penWidthOut * cos(M_PI_2 + alpha + theta));
+ pt.y = yo + round(penWidthOut * sin(M_PI_2 + alpha + theta));
+ }
+ PATH_AddEntry(pOutsidePath, &pt, PT_BEZIERTO);
+ break;
+ }
+ }
+ }
+ for (j = 0; j < pUpPath->numEntriesUsed; j++)
+ {
+ POINT pt;
+ pt.x = pUpPath->pPoints[j].x;
+ pt.y = pUpPath->pPoints[j].y;
+ PATH_AddEntry(pNewPath, &pt, (j == 0 ? PT_MOVETO : PT_LINETO));
+ }
+ for (j = 0; j < pDownPath->numEntriesUsed; j++)
+ {
+ POINT pt;
+ pt.x = pDownPath->pPoints[pDownPath->numEntriesUsed - j - 1].x;
+ pt.y = pDownPath->pPoints[pDownPath->numEntriesUsed - j - 1].y;
+ PATH_AddEntry(pNewPath, &pt, ((j == 0 && (pStrokes[i]->pFlags[pStrokes[i]->numEntriesUsed - 1] & PT_CLOSEFIGURE)) ? PT_MOVETO : PT_LINETO));
+ }
+
+ PATH_DestroyGdiPath(pStrokes[i]);
+ ExFreePoolWithTag(pStrokes[i], TAG_PATH);
+ PATH_DestroyGdiPath(pUpPath);
+ ExFreePoolWithTag(pUpPath, TAG_PATH);
+ PATH_DestroyGdiPath(pDownPath);
+ ExFreePoolWithTag(pDownPath, TAG_PATH);
+ }
+ if (pStrokes) ExFreePoolWithTag(pStrokes, TAG_PATH);
+
+ pNewPath->state = PATH_Closed;
+ if (!(ret = PATH_AssignGdiPath(pPath, pNewPath)))
+ DPRINT1("Assign path failed\n");
+ PATH_DestroyGdiPath(pNewPath);
+ ExFreePoolWithTag(pNewPath, TAG_PATH);
+ PATH_UnlockPath(pPath);
+ return ret;
+}
+
+static inline INT int_from_fixed(FIXED f)
+{
+ return (f.fract >= 0x8000) ? (f.value + 1) : f.value;
+}
+
+/**********************************************************************
+ * PATH_BezierTo
+ *
+ * Internally used by PATH_add_outline
+ */
+static
+VOID
+FASTCALL
+PATH_BezierTo(
+ PPATH pPath,
+ POINT *lppt,
+ INT n)
+{
+ if (n < 2) return;
+
+ if (n == 2)
+ {
+ PATH_AddEntry(pPath, &lppt[1], PT_LINETO);
+ }
+ else if (n == 3)
+ {
+ PATH_AddEntry(pPath, &lppt[0], PT_BEZIERTO);
+ PATH_AddEntry(pPath, &lppt[1], PT_BEZIERTO);
+ PATH_AddEntry(pPath, &lppt[2], PT_BEZIERTO);
+ }
+ else
+ {
+ POINT pt[3];
+ INT i = 0;
+
+ pt[2] = lppt[0];
+ n--;
+
+ while (n > 2)
+ {
+ pt[0] = pt[2];
+ pt[1] = lppt[i + 1];
+ pt[2].x = (lppt[i + 2].x + lppt[i + 1].x) / 2;
+ pt[2].y = (lppt[i + 2].y + lppt[i + 1].y) / 2;
+ PATH_BezierTo(pPath, pt, 3);
+ n--;
+ i++;
+ }
+
+ pt[0] = pt[2];
+ pt[1] = lppt[i + 1];
+ pt[2] = lppt[i + 2];
+ PATH_BezierTo(pPath, pt, 3);
+ }
+}
+
+static
+BOOL
+FASTCALL
+PATH_add_outline(
+ PDC dc,
+ INT x,
+ INT y,
+ TTPOLYGONHEADER *header,
+ DWORD size)
+{
+ PPATH pPath;
+ TTPOLYGONHEADER *start;
+ POINT pt;
+ BOOL bResult = FALSE;
+
+ start = header;
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath)
+ {
+ return FALSE;
+ }
+
+ while ((char *)header < (char *)start + size)
+ {
+ TTPOLYCURVE *curve;
+
+ if (header->dwType != TT_POLYGON_TYPE)
+ {
+ DPRINT1("Unknown header type %lu\n", header->dwType);
+ goto cleanup;
+ }
+
+ pt.x = x + int_from_fixed(header->pfxStart.x);
+ pt.y = y - int_from_fixed(header->pfxStart.y);
+ PATH_AddEntry(pPath, &pt, PT_MOVETO);
+
+ curve = (TTPOLYCURVE *)(header + 1);
+
+ while ((char *)curve < (char *)header + header->cb)
+ {
+ /*DPRINT1("curve->wType %d\n", curve->wType);*/
+
+ switch(curve->wType)
+ {
+ case TT_PRIM_LINE:
+ {
+ WORD i;
+
+ for (i = 0; i < curve->cpfx; i++)
+ {
+ pt.x = x + int_from_fixed(curve->apfx[i].x);
+ pt.y = y - int_from_fixed(curve->apfx[i].y);
+ PATH_AddEntry(pPath, &pt, PT_LINETO);
+ }
+ break;
+ }
+
+ case TT_PRIM_QSPLINE:
+ case TT_PRIM_CSPLINE:
+ {
+ WORD i;
+ POINTFX ptfx;
+ POINT *pts = ExAllocatePoolWithTag(PagedPool, (curve->cpfx + 1) * sizeof(POINT), TAG_PATH);
+
+ if (!pts) goto cleanup;
+
+ ptfx = *(POINTFX *)((char *)curve - sizeof(POINTFX));
+
+ pts[0].x = x + int_from_fixed(ptfx.x);
+ pts[0].y = y - int_from_fixed(ptfx.y);
+
+ for (i = 0; i < curve->cpfx; i++)
+ {
+ pts[i + 1].x = x + int_from_fixed(curve->apfx[i].x);
+ pts[i + 1].y = y - int_from_fixed(curve->apfx[i].y);
+ }
+
+ PATH_BezierTo(pPath, pts, curve->cpfx + 1);
+
+ ExFreePoolWithTag(pts, TAG_PATH);
+ break;
+ }
+
+ default:
+ DPRINT1("Unknown curve type %04x\n", curve->wType);
+ goto cleanup;
+ }
+
+ curve = (TTPOLYCURVE *)&curve->apfx[curve->cpfx];
+ }
+ header = (TTPOLYGONHEADER *)((char *)header + header->cb);
+ }
+
+ bResult = TRUE;
+
+cleanup:
+ IntGdiCloseFigure(pPath);
+ PATH_UnlockPath(pPath);
+ return bResult;
+}
+
+/**********************************************************************
+ * PATH_ExtTextOut
+ */
+BOOL
+FASTCALL
+PATH_ExtTextOut(
+ PDC dc,
+ INT x,
+ INT y,
+ UINT flags,
+ const RECTL *lprc,
+ LPCWSTR str,
+ UINT count,
+ const INT *dx)
+{
+ unsigned int idx;
+ POINT offset = {0, 0};
+
+ if (!count) return TRUE;
+
+ for (idx = 0; idx < count; idx++)
+ {
+ MAT2 identity = { {0, 1}, {0, 0}, {0, 0}, {0, 1} };
+ GLYPHMETRICS gm;
+ DWORD dwSize;
+ void *outline;
+
+ dwSize = ftGdiGetGlyphOutline(dc,
+ str[idx],
+ GGO_GLYPH_INDEX | GGO_NATIVE,
+ &gm,
+ 0,
+ NULL,
+ &identity,
+ TRUE);
+ if (dwSize == GDI_ERROR) return FALSE;
+
+ /* Add outline only if char is printable */
+ if (dwSize)
+ {
+ outline = ExAllocatePoolWithTag(PagedPool, dwSize, TAG_PATH);
+ if (!outline) return FALSE;
+
+ ftGdiGetGlyphOutline(dc,
+ str[idx],
+ GGO_GLYPH_INDEX | GGO_NATIVE,
+ &gm,
+ dwSize,
+ outline,
+ &identity,
+ TRUE);
+
+ PATH_add_outline(dc, x + offset.x, y + offset.y, outline, dwSize);
+
+ ExFreePoolWithTag(outline, TAG_PATH);
+ }
+
+ if (dx)
+ {
+ if (flags & ETO_PDY)
+ {
+ offset.x += dx[idx * 2];
+ offset.y += dx[idx * 2 + 1];
+ }
+ else
+ offset.x += dx[idx];
+ }
+ else
+ {
+ offset.x += gm.gmCellIncX;
+ offset.y += gm.gmCellIncY;
+ }
+ }
+ return TRUE;
+}
+
+
+/***********************************************************************
+ * Exported functions
+ */
+
+BOOL
+APIENTRY
+NtGdiAbortPath(HDC hDC)
+{
+ PPATH pPath;
+ PDC dc = DC_LockDc(hDC);
+ if (!dc)
+ {
+ EngSetLastError(ERROR_INVALID_HANDLE);
+ return FALSE;
+ }
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(dc);
+ return FALSE;
+ }
+
+ PATH_EmptyPath(pPath);
+
+ PATH_UnlockPath(pPath);
+ dc->dclevel.flPath &= ~DCPATH_ACTIVE;
+
+ DC_UnlockDc(dc);
+ return TRUE;
+}
+
+BOOL
+APIENTRY
+NtGdiBeginPath(HDC hDC)
+{
+ PPATH pPath;
+ PDC dc;
+
+ dc = DC_LockDc(hDC);
+ if (!dc)
+ {
+ EngSetLastError(ERROR_INVALID_HANDLE);
+ return FALSE;
+ }
+
+ /* If path is already open, do nothing. Check if not Save DC state */
+ if ((dc->dclevel.flPath & DCPATH_ACTIVE) && !(dc->dclevel.flPath & DCPATH_SAVE))
+ {
+ DC_UnlockDc(dc);
+ return TRUE;
+ }
+
+ if (dc->dclevel.hPath)
+ {
+ DPRINT("BeginPath 1 0x%p\n", dc->dclevel.hPath);
+ if (!(dc->dclevel.flPath & DCPATH_SAVE))
+ {
+ // Remove previous handle.
+ if (!PATH_Delete(dc->dclevel.hPath))
+ {
+ DC_UnlockDc(dc);
+ return FALSE;
+ }
+ }
+ else
+ {
+ // Clear flags and Handle.
+ dc->dclevel.flPath &= ~(DCPATH_SAVE | DCPATH_ACTIVE);
+ dc->dclevel.hPath = NULL;
+ }
+ }
+ pPath = PATH_AllocPathWithHandle();
+ if (!pPath)
+ {
+ EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ return FALSE;
+ }
+ dc->dclevel.flPath |= DCPATH_ACTIVE; // Set active ASAP!
+
+ dc->dclevel.hPath = pPath->BaseObject.hHmgr;
+
+ DPRINT("BeginPath 2 h 0x%p p 0x%p\n", dc->dclevel.hPath, pPath);
+ // Path handles are shared. Also due to recursion with in the same thread.
+ GDIOBJ_vUnlockObject((POBJ)pPath); // Unlock
+ pPath = PATH_LockPath(dc->dclevel.hPath); // Share Lock.
+
+ /* Make sure that path is empty */
+ PATH_EmptyPath(pPath);
+
+ /* Initialize variables for new path */
+ pPath->newStroke = TRUE;
+ pPath->state = PATH_Open;
+
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(dc);
+ return TRUE;
+}
+
+BOOL
+APIENTRY
+NtGdiCloseFigure(HDC hDC)
+{
+ BOOL Ret = FALSE; // Default to failure
+ PDC pDc;
+ PPATH pPath;
+
+ DPRINT("Enter %s\n", __FUNCTION__);
+
+ pDc = DC_LockDc(hDC);
+ if (!pDc)
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+
+ pPath = PATH_LockPath(pDc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(pDc);
+ return FALSE;
+ }
+
+ if (pPath->state == PATH_Open)
+ {
+ IntGdiCloseFigure(pPath);
+ Ret = TRUE;
+ }
+ else
+ {
+ // FIXME: Check if lasterror is set correctly
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ }
+
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(pDc);
+ return Ret;
+}
+
+BOOL
+APIENTRY
+NtGdiEndPath(HDC hDC)
+{
+ BOOL ret = TRUE;
+ PPATH pPath;
+ PDC dc;
+
+ dc = DC_LockDc(hDC);
+ if (!dc)
+ {
+ EngSetLastError(ERROR_INVALID_HANDLE);
+ return FALSE;
+ }
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(dc);
+ return FALSE;
+ }
+
+ /* Check that path is currently being constructed */
+ if ((pPath->state != PATH_Open) || !(dc->dclevel.flPath & DCPATH_ACTIVE))
+ {
+ DPRINT1("EndPath ERROR! 0x%p\n", dc->dclevel.hPath);
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ ret = FALSE;
+ }
+ /* Set flag to indicate that path is finished */
+ else
+ {
+ DPRINT("EndPath 0x%p\n", dc->dclevel.hPath);
+ pPath->state = PATH_Closed;
+ dc->dclevel.flPath &= ~DCPATH_ACTIVE;
+ }
+
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(dc);
+ return ret;
+}
+
+BOOL
+APIENTRY
+NtGdiFillPath(HDC hDC)
+{
+ BOOL ret = FALSE;
+ PPATH pPath;
+ PDC_ATTR pdcattr;
+ PDC dc;
+
+ dc = DC_LockDc(hDC);
+ if (!dc)
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(dc);
+ return FALSE;
+ }
+
+ DC_vPrepareDCsForBlit(dc, NULL, NULL, NULL);
+
+ pdcattr = dc->pdcattr;
+
+ if (pdcattr->ulDirty_ & (DIRTY_LINE | DC_PEN_DIRTY))
+ DC_vUpdateLineBrush(dc);
+
+ if (pdcattr->ulDirty_ & (DIRTY_FILL | DC_BRUSH_DIRTY))
+ DC_vUpdateFillBrush(dc);
+
+ ret = PATH_FillPath(dc, pPath);
+ if (ret)
+ {
+ /* FIXME: Should the path be emptied even if conversion
+ failed? */
+ PATH_EmptyPath(pPath);
+ }
+
+ PATH_UnlockPath(pPath);
+ DC_vFinishBlit(dc, NULL);
+ DC_UnlockDc(dc);
+ return ret;
+}
+
+BOOL
+APIENTRY
+NtGdiFlattenPath(HDC hDC)
+{
+ BOOL Ret = FALSE;
+ DC *pDc;
+ PPATH pPath;
+
+ DPRINT("Enter %s\n", __FUNCTION__);
+
+ pDc = DC_LockDc(hDC);
+ if (!pDc)
+ {
+ EngSetLastError(ERROR_INVALID_HANDLE);
+ return FALSE;
+ }
+
+ pPath = PATH_LockPath(pDc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(pDc);
+ return FALSE;
+ }
+ if (pPath->state == PATH_Open)
+ Ret = PATH_FlattenPath(pPath);
+
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(pDc);
+ return Ret;
+}
+
+_Success_(return != FALSE)
+BOOL
+APIENTRY
+NtGdiGetMiterLimit(
+ _In_ HDC hdc,
+ _Out_ PDWORD pdwOut)
+{
+ DC *pDc;
+ BOOL bResult = TRUE;
+
+ if (!(pDc = DC_LockDc(hdc)))
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+
+ _SEH2_TRY
+ {
+ ProbeForWrite(pdwOut, sizeof(DWORD), 1);
+ *pdwOut = pDc->dclevel.laPath.eMiterLimit;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ SetLastNtError(_SEH2_GetExceptionCode());
+ bResult = FALSE;
+ }
+ _SEH2_END;
+
+ DC_UnlockDc(pDc);
+ return bResult;
+
+}
+
+INT
+APIENTRY
+NtGdiGetPath(
+ HDC hDC,
+ LPPOINT Points,
+ LPBYTE Types,
+ INT nSize)
+{
+ INT ret = -1;
+ PPATH pPath;
+
+ DC *dc = DC_LockDc(hDC);
+ if (!dc)
+ {
+ DPRINT1("Can't lock dc!\n");
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return -1;
+ }
+
+ pPath = PATH_LockPath(dc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(dc);
+ return -1;
+ }
+
+ if (pPath->state != PATH_Closed)
+ {
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ goto done;
+ }
+
+ if (nSize == 0)
+ {
+ ret = pPath->numEntriesUsed;
+ }
+ else if (nSize < pPath->numEntriesUsed)
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ goto done;
+ }
+ else
+ {
+ _SEH2_TRY
+ {
+ memcpy(Points, pPath->pPoints, sizeof(POINT)*pPath->numEntriesUsed);
+ memcpy(Types, pPath->pFlags, sizeof(BYTE)*pPath->numEntriesUsed);
+
+ /* Convert the points to logical coordinates */
+ if (!GdiPathDPtoLP(dc, Points, pPath->numEntriesUsed))
+ {
+ EngSetLastError(ERROR_ARITHMETIC_OVERFLOW);
+ _SEH2_LEAVE;
+ }
+
+ ret = pPath->numEntriesUsed;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ SetLastNtError(_SEH2_GetExceptionCode());
+ }
+ _SEH2_END
+ }
+
+done:
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(dc);
+ return ret;
+}
+
+HRGN
+APIENTRY
+NtGdiPathToRegion(HDC hDC)
+{
+ PPATH pPath;
+ HRGN hrgnRval = 0;
+ PREGION Rgn;
+ DC *pDc;
+ PDC_ATTR pdcattr;
+
+ DPRINT("Enter %s\n", __FUNCTION__);
+
+ pDc = DC_LockDc(hDC);
+ if (!pDc)
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return NULL;
+ }
+
+ pdcattr = pDc->pdcattr;
+
+ pPath = PATH_LockPath(pDc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(pDc);
+ return NULL;
+ }
+
+ if (pPath->state != PATH_Closed)
+ {
+ // FIXME: Check that setlasterror is being called correctly
+ EngSetLastError(ERROR_CAN_NOT_COMPLETE);
+ }
+ else
+ {
+ /* Create the region and fill it with the path strokes */
+ Rgn = REGION_AllocUserRgnWithHandle(1);
+ if (!Rgn)
+ {
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(pDc);
+ return NULL;
+ }
+ hrgnRval = Rgn->BaseObject.hHmgr;
+ /* FIXME: Should we empty the path even if conversion failed? */
+ if (PATH_PathToRegion(pPath, pdcattr->jFillMode, Rgn))
+ {
+ PATH_EmptyPath(pPath);
+ REGION_UnlockRgn(Rgn);
+ }
+ else
+ {
+ REGION_Delete(Rgn);
+ hrgnRval = NULL;
+ }
+ }
+
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(pDc);
+ return hrgnRval;
+}
+
+BOOL
+APIENTRY
+NtGdiSetMiterLimit(
+ IN HDC hdc,
+ IN DWORD dwNew,
+ IN OUT OPTIONAL PDWORD pdwOut)
+{
+ DC *pDc;
+ gxf_long worker, worker1;
+ BOOL bResult = TRUE;
+
+ if (!(pDc = DC_LockDc(hdc)))
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+
+ worker.l = dwNew;
+ worker1.f = pDc->dclevel.laPath.eMiterLimit;
+ pDc->dclevel.laPath.eMiterLimit = worker.f;
+
+ if (pdwOut)
+ {
+ _SEH2_TRY
+ {
+ ProbeForWrite(pdwOut, sizeof(DWORD), 1);
+ *pdwOut = worker1.l;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ SetLastNtError(_SEH2_GetExceptionCode());
+ bResult = FALSE;
+ }
+ _SEH2_END;
+ }
+
+ DC_UnlockDc(pDc);
+ return bResult;
+}
+
+BOOL
+APIENTRY
+NtGdiStrokeAndFillPath(HDC hDC)
+{
+ DC *pDc;
+ PDC_ATTR pdcattr;
+ PPATH pPath;
+ BOOL bRet = FALSE;
+
+ DPRINT1("Enter %s\n", __FUNCTION__);
+
+ if (!(pDc = DC_LockDc(hDC)))
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+ pPath = PATH_LockPath(pDc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(pDc);
+ return FALSE;
+ }
+
+ DC_vPrepareDCsForBlit(pDc, NULL, NULL, NULL);
+
+ pdcattr = pDc->pdcattr;
+
+ if (pdcattr->ulDirty_ & (DIRTY_FILL | DC_BRUSH_DIRTY))
+ DC_vUpdateFillBrush(pDc);
+
+ if (pdcattr->ulDirty_ & (DIRTY_LINE | DC_PEN_DIRTY))
+ DC_vUpdateLineBrush(pDc);
+
+ bRet = PATH_FillPath(pDc, pPath);
+ if (bRet) bRet = PATH_StrokePath(pDc, pPath);
+ if (bRet) PATH_EmptyPath(pPath);
+
+ PATH_UnlockPath(pPath);
+ DC_vFinishBlit(pDc, NULL);
+ DC_UnlockDc(pDc);
+ return bRet;
+}
+
+BOOL
+APIENTRY
+NtGdiStrokePath(HDC hDC)
+{
+ DC *pDc;
+ PDC_ATTR pdcattr;
+ PPATH pPath;
+ BOOL bRet = FALSE;
+
+ DPRINT("Enter %s\n", __FUNCTION__);
+
+ if (!(pDc = DC_LockDc(hDC)))
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+
+ pPath = PATH_LockPath(pDc->dclevel.hPath);
+ if (!pPath)
+ {
+ DC_UnlockDc(pDc);
+ return FALSE;
+ }
+
+ DC_vPrepareDCsForBlit(pDc, NULL, NULL, NULL);
+
+ pdcattr = pDc->pdcattr;
+
+ if (pdcattr->ulDirty_ & (DIRTY_LINE | DC_PEN_DIRTY))
+ DC_vUpdateLineBrush(pDc);
+
+ bRet = PATH_StrokePath(pDc, pPath);
+
+ DC_vFinishBlit(pDc, NULL);
+ PATH_EmptyPath(pPath);
+
+ PATH_UnlockPath(pPath);
+ DC_UnlockDc(pDc);
+ return bRet;
+}
+
+BOOL
+APIENTRY
+NtGdiWidenPath(HDC hDC)
+{
+ BOOL Ret;
+ PDC pdc = DC_LockDc(hDC);
+ if (!pdc)
+ {
+ EngSetLastError(ERROR_INVALID_PARAMETER);
+ return FALSE;
+ }
+
+ Ret = PATH_WidenPath(pdc);
+ DC_UnlockDc(pdc);
+ return Ret;
+}
+
+/* EOF */
projects / reactos.git / blobdiff