/* $XConsortium: miQuadMesh.c,v 5.5 94/04/17 20:37:16 hersh Exp $ */ /* $XFree86: xc/programs/Xserver/PEX5/ddpex/mi/level2/miQuadMesh.c,v 3.1 1996/03/29 22:09:48 dawes Exp $ */ /* Copyright (c) 1989, 1990, 1991 X Consortium Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the X Consortium shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the X Consortium. Copyright 1989, 1990, 1991 by Sun Microsystems, Inc. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, 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 Sun Microsystems not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SUN MICROSYSTEMS 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 "miLUT.h" #include "ddpex2.h" #include "ddpex3.h" #include "PEXErr.h" #include "miStruct.h" #include "PEXprotost.h" #include "misc.h" #include "miscstruct.h" #include "miRender.h" #include "gcstruct.h" #include "miClip.h" #include /*++ | | Function Name: miQuadMesh | | Function Description: | Handles the Quad Mesh OC | | Note(s):This routine decomposes Quad Meshes to a series of triangle | meshes for rendering | --*/ ddpex3rtn miQuadMesh(pRend, pExecuteOC) /* in */ ddRendererPtr pRend; miGenericStr *pExecuteOC; { /* Calls */ extern ocTableType InitExecuteOCTable[]; /* Local variable definitions */ miQuadMeshStruct *ddQuad = (miQuadMeshStruct *)(pExecuteOC+1); miDDContext *pddc = (miDDContext *)(pRend->pDDContext); miGenericStr *pGStr; miTriangleStripStruct *ddTri; /*pointer to temporary |triangle strip structure |for decomposed QuadMesh |row of cells */ miListHeader *tri_list; ddPointUnion in_pt, out_pt; listofddFacet *tri_facets; char *quad_fptr, /* pointers to */ *tri_fptr; /* facet data */ ddpex3rtn status; int inpoint_size, outpoint_size, facet_size, row_size, edge_offset, i,j, num_cols, num_rows; /***********************************************************************/ /* Initialize status */ status = Success; /* Allocate space for a Generic Structure Element */ if (!(pGStr = (miGenericStr *) (xalloc(sizeof(miGenericStr) + sizeof(miTriangleStripStruct))))) { status = BadAlloc; goto exit; } /* Initialize the header data into allocated generic struct */ pGStr->elementType = PEXOCTriangleStrip; /* The length data is ignored by the rendering routine and hence is */ /* left as whatever GARBAGE that will be present at the alloc time. */ ddTri = (miTriangleStripStruct *) (pGStr + 1); num_cols = (ddQuad->mPts - 1); num_rows = (ddQuad->nPts - 1); /* At this point, we need to check if the edges are visible or not. */ /* If they are we need to explicitly add them. This is part of the */ /* because they are in the FillArea primitive, and we didn't wish */ /* to have special cases all over the code. (particularly structure */ /* storage and readback on both sides of the wire) */ DD_VertPointSize(ddQuad->points.type, inpoint_size); in_pt.ptr = ddQuad->points.ddList->pts.ptr; row_size = (inpoint_size * (num_cols+ 1)); quad_fptr = (char *)ddQuad->pFacets->facets.pNoFacet; for (i = 1; i <= num_rows ; i++) { /* All temporary storage must be reallocated * each time, since the allocation routines rotate through * the headers, and will overwrite any particular header * after four calls. This coould perhaps be avoided by * directly using xalloc, but we do it this way for * consistency. */ tri_list = MI_NEXTTEMPDATALIST(pddc); /* get new miListHeader */ MI_ALLOCLISTHEADER(tri_list, 1); /* get new ddList attached */ tri_list->ddList->numPoints = 2 * (num_cols + 1); tri_list->type = ddQuad->points.type; if ((pddc->Static.attrs->edges != PEXOff) && (!(DD_IsVertEdge(ddQuad->points.type)))) { DD_SetVertEdge(tri_list->type); DD_VertOffsetEdge(tri_list->type, edge_offset); } DD_VertPointSize(tri_list->type, outpoint_size); tri_list->flags = ddQuad->points.flags; tri_list->numLists = 1; MI_ALLOCLISTOFDDPOINT( /* get vertex storage */ tri_list->ddList, (2 * (num_cols + 1)), (outpoint_size)); /* Allocate triangle strip facet storage if necessary*/ if (ddQuad->pFacets) { if (ddQuad->pFacets->numFacets > 0) { DDFacetSIZE(ddQuad->pFacets->type, facet_size); tri_facets = MI_NEXTTEMPFACETLIST(pddc); tri_facets->type = ddQuad->pFacets->type; MI_ALLOCLISTOFDDFACET(tri_facets, 2 * num_cols, facet_size); if (!tri_facets->facets.pFacetRgbFloatN) { status = BadAlloc; goto exit; } tri_fptr = (char *)tri_facets->facets.pNoFacet; tri_facets->numFacets = 2 * num_cols; ddTri->pFacets = tri_facets; } else { quad_fptr = 0; tri_fptr = 0; tri_facets = 0; ddTri->pFacets = 0; } } else { quad_fptr = 0; tri_fptr = 0; tri_facets = 0; ddTri->pFacets = 0; } out_pt.ptr = tri_list->ddList->pts.ptr; memcpy( out_pt.ptr, in_pt.ptr, inpoint_size); if (pddc->Static.attrs->edges != PEXOff) { *(out_pt.ptr + edge_offset) = ~0; } out_pt.ptr += outpoint_size; memcpy( out_pt.ptr, (in_pt.ptr + row_size), inpoint_size); if (pddc->Static.attrs->edges != PEXOff) { *(out_pt.ptr + edge_offset) = ~0; CLEAR_FWD_EDGE(out_pt.ptr, edge_offset); } in_pt.ptr += inpoint_size; out_pt.ptr += outpoint_size; /* Build up a triangle strip */ for (j = 1; j <= num_cols; j++) { memcpy( out_pt.ptr, in_pt.ptr, inpoint_size); if (pddc->Static.attrs->edges != PEXOff) { *(out_pt.ptr + edge_offset) = ~0; } out_pt.ptr += outpoint_size; memcpy( out_pt.ptr, (in_pt.ptr + row_size), inpoint_size); if (pddc->Static.attrs->edges != PEXOff){ *(out_pt.ptr + edge_offset) = ~0; CLEAR_FWD_EDGE(out_pt.ptr, edge_offset); } in_pt.ptr += inpoint_size; out_pt.ptr += outpoint_size; if (ddQuad->pFacets->numFacets > 0) { memcpy( tri_fptr, quad_fptr, facet_size); tri_fptr += facet_size; memcpy( tri_fptr, quad_fptr, facet_size); tri_fptr += facet_size; quad_fptr += facet_size; } } ddTri->points = *tri_list; /*fire off the triangle strip routine*/ if (status = InitExecuteOCTable[(int)(pGStr->elementType)](pRend, pGStr)) goto exit; } /* Free up allocated space for generic struct and return */ exit: xfree((char *)pGStr); return (status); }