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gdi32: Convert the edges list to a standard list in CreatePolyPolygonRgn.

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Alexandre Julliard 2013-04-22 22:41:51 +02:00
parent 6a9b775f36
commit 31f0079f1c
1 changed files with 74 additions and 171 deletions
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235
dlls/gdi32/region.c
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@ -351,25 +351,18 @@ static inline void bres_incr_polygon( struct bres_info *bres )
* drawn (as with the even-odd rule). * drawn (as with the even-odd rule).
*/ */
/* typedef struct edge_table_entry {
* for the winding number rule struct list entry;
*/ struct list winding_entry;
#define CLOCKWISE 1
#define COUNTERCLOCKWISE -1
typedef struct _EdgeTableEntry {
INT ymax; /* ycoord at which we exit this edge. */ INT ymax; /* ycoord at which we exit this edge. */
struct bres_info bres; /* Bresenham info to run the edge */ struct bres_info bres; /* Bresenham info to run the edge */
struct _EdgeTableEntry *next; /* next in the list */
struct _EdgeTableEntry *back; /* for insertion sort */
struct _EdgeTableEntry *nextWETE; /* for winding num rule */
int ClockWise; /* flag for winding number rule */ int ClockWise; /* flag for winding number rule */
} EdgeTableEntry; } EdgeTableEntry;
typedef struct _ScanLineList{ typedef struct _ScanLineList{
struct list edgelist;
INT scanline; /* the scanline represented */ INT scanline; /* the scanline represented */
EdgeTableEntry *edgelist; /* header node */
struct _ScanLineList *next; /* next in the list */ struct _ScanLineList *next; /* next in the list */
} ScanLineList; } ScanLineList;
@ -394,56 +387,6 @@ typedef struct _ScanLineListBlock {
} ScanLineListBlock; } ScanLineListBlock;
/*
*
* a few macros for the inner loops of the fill code where
* performance considerations don't allow a procedure call.
*
* Evaluate the given edge at the given scanline.
* If the edge has expired, then we leave it and fix up
* the active edge table; otherwise, we increment the
* x value to be ready for the next scanline.
* The winding number rule is in effect, so we must notify
* the caller when the edge has been removed so he
* can reorder the Winding Active Edge Table.
*/
#define EVALUATEEDGEWINDING(pAET, pPrevAET, y, fixWAET) { \
if (pAET->ymax == y) { /* leaving this edge */ \
pPrevAET->next = pAET->next; \
pAET = pPrevAET->next; \
fixWAET = 1; \
if (pAET) \
pAET->back = pPrevAET; \
} \
else { \
bres_incr_polygon(&pAET->bres); \
pPrevAET = pAET; \
pAET = pAET->next; \
} \
}
/*
* Evaluate the given edge at the given scanline.
* If the edge has expired, then we leave it and fix up
* the active edge table; otherwise, we increment the
* x value to be ready for the next scanline.
* The even-odd rule is in effect.
*/
#define EVALUATEEDGEEVENODD(pAET, pPrevAET, y) { \
if (pAET->ymax == y) { /* leaving this edge */ \
pPrevAET->next = pAET->next; \
pAET = pPrevAET->next; \
if (pAET) \
pAET->back = pPrevAET; \
} \
else { \
bres_incr_polygon(&pAET->bres); \
pPrevAET = pAET; \
pAET = pAET->next; \
} \
}
/* Note the parameter order is different from the X11 equivalents */ /* Note the parameter order is different from the X11 equivalents */
static BOOL REGION_CopyRegion(WINEREGION *d, WINEREGION *s); static BOOL REGION_CopyRegion(WINEREGION *d, WINEREGION *s);
@ -2376,7 +2319,7 @@ static void REGION_InsertEdgeInET(EdgeTable *ET, EdgeTableEntry *ETE,
INT scanline, ScanLineListBlock **SLLBlock, INT *iSLLBlock) INT scanline, ScanLineListBlock **SLLBlock, INT *iSLLBlock)
{ {
EdgeTableEntry *start, *prev; struct list *ptr;
ScanLineList *pSLL, *pPrevSLL; ScanLineList *pSLL, *pPrevSLL;
ScanLineListBlock *tmpSLLBlock; ScanLineListBlock *tmpSLLBlock;
@ -2412,7 +2355,7 @@ static void REGION_InsertEdgeInET(EdgeTable *ET, EdgeTableEntry *ETE,
pSLL = &((*SLLBlock)->SLLs[(*iSLLBlock)++]); pSLL = &((*SLLBlock)->SLLs[(*iSLLBlock)++]);
pSLL->next = pPrevSLL->next; pSLL->next = pPrevSLL->next;
pSLL->edgelist = NULL; list_init( &pSLL->edgelist );
pPrevSLL->next = pSLL; pPrevSLL->next = pSLL;
} }
pSLL->scanline = scanline; pSLL->scanline = scanline;
@ -2420,19 +2363,12 @@ static void REGION_InsertEdgeInET(EdgeTable *ET, EdgeTableEntry *ETE,
/* /*
* now insert the edge in the right bucket * now insert the edge in the right bucket
*/ */
prev = NULL; LIST_FOR_EACH( ptr, &pSLL->edgelist )
start = pSLL->edgelist;
while (start && (start->bres.minor_axis < ETE->bres.minor_axis))
{ {
prev = start; struct edge_table_entry *entry = LIST_ENTRY( ptr, struct edge_table_entry, entry );
start = start->next; if (entry->bres.minor_axis >= ETE->bres.minor_axis) break;
} }
ETE->next = start; list_add_before( ptr, &ETE->entry );
if (prev)
prev->next = ETE;
else
pSLL->edgelist = ETE;
} }
/*********************************************************************** /***********************************************************************
@ -2459,8 +2395,8 @@ static void REGION_InsertEdgeInET(EdgeTable *ET, EdgeTableEntry *ETE,
* which an edge is initially entered. * which an edge is initially entered.
* *
*/ */
static void REGION_CreateETandAET(const INT *Count, INT nbpolygons, static void REGION_CreateEdgeTable(const INT *Count, INT nbpolygons,
const POINT *pts, EdgeTable *ET, EdgeTableEntry *AET, const POINT *pts, EdgeTable *ET,
EdgeTableEntry *pETEs, ScanLineListBlock *pSLLBlock) EdgeTableEntry *pETEs, ScanLineListBlock *pSLLBlock)
{ {
const POINT *top, *bottom; const POINT *top, *bottom;
@ -2469,15 +2405,6 @@ static void REGION_CreateETandAET(const INT *Count, INT nbpolygons,
int iSLLBlock = 0; int iSLLBlock = 0;
int dy; int dy;
/*
* initialize the Active Edge Table
*/
AET->next = NULL;
AET->back = NULL;
AET->nextWETE = NULL;
AET->bres.minor_axis = SMALL_COORDINATE;
/* /*
* initialize the Edge Table. * initialize the Edge Table.
*/ */
@ -2556,29 +2483,20 @@ static void REGION_CreateETandAET(const INT *Count, INT nbpolygons,
* leaving them sorted by smaller x coordinate. * leaving them sorted by smaller x coordinate.
* *
*/ */
static void REGION_loadAET(EdgeTableEntry *AET, EdgeTableEntry *ETEs) static void REGION_loadAET( struct list *AET, struct list *ETEs )
{ {
EdgeTableEntry *pPrevAET; struct edge_table_entry *ptr, *next, *entry;
EdgeTableEntry *tmp; struct list *active;
pPrevAET = AET; LIST_FOR_EACH_ENTRY_SAFE( ptr, next, ETEs, struct edge_table_entry, entry )
AET = AET->next;
while (ETEs)
{ {
while (AET && (AET->bres.minor_axis < ETEs->bres.minor_axis)) LIST_FOR_EACH( active, AET )
{ {
pPrevAET = AET; entry = LIST_ENTRY( active, struct edge_table_entry, entry );
AET = AET->next; if (entry->bres.minor_axis >= ptr->bres.minor_axis) break;
} }
tmp = ETEs->next; list_remove( &ptr->entry );
ETEs->next = AET; list_add_before( active, &ptr->entry );
if (AET)
AET->back = ETEs;
ETEs->back = pPrevAET;
pPrevAET->next = ETEs;
pPrevAET = ETEs;
ETEs = tmp;
} }
} }
@ -2602,70 +2520,50 @@ static void REGION_loadAET(EdgeTableEntry *AET, EdgeTableEntry *ETEs)
* V-------------------> V---> ... * V-------------------> V---> ...
* *
*/ */
static void REGION_computeWAET(EdgeTableEntry *AET) static void REGION_computeWAET( struct list *AET, struct list *WETE )
{ {
EdgeTableEntry *pWETE; struct edge_table_entry *active;
int inside = 1; int inside = 1;
int isInside = 0; int isInside = 0;
AET->nextWETE = NULL; list_init( WETE );
pWETE = AET; LIST_FOR_EACH_ENTRY( active, AET, struct edge_table_entry, entry )
AET = AET->next;
while (AET)
{ {
if (AET->ClockWise) if (active->ClockWise)
isInside++; isInside++;
else else
isInside--; isInside--;
if ((!inside && !isInside) || if ((!inside && !isInside) || (inside && isInside))
( inside && isInside))
{ {
pWETE->nextWETE = AET; list_add_tail( WETE, &active->winding_entry );
pWETE = AET;
inside = !inside; inside = !inside;
} }
AET = AET->next;
} }
pWETE->nextWETE = NULL;
} }
/*********************************************************************** /***********************************************************************
* REGION_InsertionSort * REGION_InsertionSort
* *
* Just a simple insertion sort using * Just a simple insertion sort to sort the Active Edge Table.
* pointers and back pointers to sort the Active
* Edge Table.
* *
*/ */
static BOOL REGION_InsertionSort(EdgeTableEntry *AET) static BOOL REGION_InsertionSort( struct list *AET )
{ {
EdgeTableEntry *pETEchase; struct edge_table_entry *active, *next, *insert;
EdgeTableEntry *pETEinsert;
EdgeTableEntry *pETEchaseBackTMP;
BOOL changed = FALSE; BOOL changed = FALSE;
AET = AET->next; LIST_FOR_EACH_ENTRY_SAFE( active, next, AET, struct edge_table_entry, entry )
while (AET)
{ {
pETEinsert = AET; LIST_FOR_EACH_ENTRY( insert, AET, struct edge_table_entry, entry )
pETEchase = AET;
while (pETEchase->back->bres.minor_axis > AET->bres.minor_axis)
pETEchase = pETEchase->back;
AET = AET->next;
if (pETEchase != pETEinsert)
{ {
pETEchaseBackTMP = pETEchase->back; if (insert == active) break;
pETEinsert->back->next = AET; if (insert->bres.minor_axis > active->bres.minor_axis) break;
if (AET)
AET->back = pETEinsert->back;
pETEinsert->next = pETEchase;
pETEchase->back->next = pETEinsert;
pETEchase->back = pETEinsert;
pETEinsert->back = pETEchaseBackTMP;
changed = TRUE;
} }
if (insert == active) continue;
list_remove( &active->entry );
list_add_before( &insert->entry, &active->entry );
changed = TRUE;
} }
return changed; return changed;
} }
@ -2759,17 +2657,16 @@ HRGN WINAPI CreatePolyPolygonRgn(const POINT *Pts, const INT *Count,
{ {
HRGN hrgn = 0; HRGN hrgn = 0;
WINEREGION *obj; WINEREGION *obj;
EdgeTableEntry *pAET; /* Active Edge Table */
INT y; /* current scanline */ INT y; /* current scanline */
EdgeTableEntry *pWETE; /* Winding Edge Table Entry*/ struct list WETE, *pWETE; /* Winding Edge Table */
ScanLineList *pSLL; /* current scanLineList */ ScanLineList *pSLL; /* current scanLineList */
EdgeTableEntry *pPrevAET; /* ptr to previous AET */
EdgeTable ET; /* header node for ET */ EdgeTable ET; /* header node for ET */
EdgeTableEntry AET; /* header node for AET */ struct list AET; /* header for AET */
EdgeTableEntry *pETEs; /* EdgeTableEntries pool */ EdgeTableEntry *pETEs; /* EdgeTableEntries pool */
ScanLineListBlock SLLBlock; /* header for scanlinelist */ ScanLineListBlock SLLBlock; /* header for scanlinelist */
int fixWAET = FALSE; int fixWAET = FALSE;
struct point_block FirstPtBlock, *block; /* PtBlock buffers */ struct point_block FirstPtBlock, *block; /* PtBlock buffers */
struct edge_table_entry *active, *next;
INT poly, total; INT poly, total;
TRACE("%p, count %d, polygons %d, mode %d\n", Pts, *Count, nbpolygons, mode); TRACE("%p, count %d, polygons %d, mode %d\n", Pts, *Count, nbpolygons, mode);
@ -2794,7 +2691,8 @@ HRGN WINAPI CreatePolyPolygonRgn(const POINT *Pts, const INT *Count,
if (! (pETEs = HeapAlloc( GetProcessHeap(), 0, sizeof(EdgeTableEntry) * total ))) if (! (pETEs = HeapAlloc( GetProcessHeap(), 0, sizeof(EdgeTableEntry) * total )))
return 0; return 0;
REGION_CreateETandAET(Count, nbpolygons, Pts, &ET, &AET, pETEs, &SLLBlock); REGION_CreateEdgeTable(Count, nbpolygons, Pts, &ET, pETEs, &SLLBlock);
list_init( &AET );
pSLL = ET.scanlines.next; pSLL = ET.scanlines.next;
block = &FirstPtBlock; block = &FirstPtBlock;
FirstPtBlock.count = 0; FirstPtBlock.count = 0;
@ -2810,19 +2708,19 @@ HRGN WINAPI CreatePolyPolygonRgn(const POINT *Pts, const INT *Count,
* get to the next edge. * get to the next edge.
*/ */
if (pSLL != NULL && y == pSLL->scanline) { if (pSLL != NULL && y == pSLL->scanline) {
REGION_loadAET(&AET, pSLL->edgelist); REGION_loadAET(&AET, &pSLL->edgelist);
pSLL = pSLL->next; pSLL = pSLL->next;
} }
pPrevAET = &AET;
pAET = AET.next;
/* LIST_FOR_EACH_ENTRY_SAFE( active, next, &AET, struct edge_table_entry, entry )
* for each active edge {
*/ block = add_point( block, active->bres.minor_axis, y );
while (pAET) {
block = add_point( block, pAET->bres.minor_axis, y );
if (!block) goto done; if (!block) goto done;
EVALUATEEDGEEVENODD(pAET, pPrevAET, y);
if (active->ymax == y) /* leaving this edge */
list_remove( &active->entry );
else
bres_incr_polygon( &active->bres );
} }
REGION_InsertionSort(&AET); REGION_InsertionSort(&AET);
} }
@ -2837,28 +2735,33 @@ HRGN WINAPI CreatePolyPolygonRgn(const POINT *Pts, const INT *Count,
* get to the next edge. * get to the next edge.
*/ */
if (pSLL != NULL && y == pSLL->scanline) { if (pSLL != NULL && y == pSLL->scanline) {
REGION_loadAET(&AET, pSLL->edgelist); REGION_loadAET(&AET, &pSLL->edgelist);
REGION_computeWAET(&AET); REGION_computeWAET( &AET, &WETE );
pSLL = pSLL->next; pSLL = pSLL->next;
} }
pPrevAET = &AET; pWETE = list_head( &WETE );
pAET = AET.next;
pWETE = pAET;
/* /*
* for each active edge * for each active edge
*/ */
while (pAET) { LIST_FOR_EACH_ENTRY_SAFE( active, next, &AET, struct edge_table_entry, entry )
{
/* /*
* add to the buffer only those edges that * add to the buffer only those edges that
* are in the Winding active edge table. * are in the Winding active edge table.
*/ */
if (pWETE == pAET) { if (pWETE == &active->winding_entry) {
block = add_point( block, pAET->bres.minor_axis, y ); block = add_point( block, active->bres.minor_axis, y );
if (!block) goto done; if (!block) goto done;
pWETE = pWETE->nextWETE; pWETE = list_next( &WETE, pWETE );
} }
EVALUATEEDGEWINDING(pAET, pPrevAET, y, fixWAET); if (active->ymax == y) /* leaving this edge */
{
list_remove( &active->entry );
fixWAET = TRUE;
}
else
bres_incr_polygon( &active->bres );
} }
/* /*
@ -2866,7 +2769,7 @@ HRGN WINAPI CreatePolyPolygonRgn(const POINT *Pts, const INT *Count,
* we just resorted or have exited an edge. * we just resorted or have exited an edge.
*/ */
if (REGION_InsertionSort(&AET) || fixWAET) { if (REGION_InsertionSort(&AET) || fixWAET) {
REGION_computeWAET(&AET); REGION_computeWAET( &AET, &WETE );
fixWAET = FALSE; fixWAET = FALSE;
} }
} }