mirror of
https://github.com/reactos/reactos.git
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740 lines
20 KiB
C
740 lines
20 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* PURPOSE: Line functions
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* FILE: win32ss/gdi/eng/lineto.c
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* PROGRAMER: ReactOS Team
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*/
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#include <win32k.h>
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#define NDEBUG
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#include <debug.h>
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static void FASTCALL
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TranslateRects(RECT_ENUM *RectEnum, POINTL* Translate)
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{
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RECTL* CurrentRect;
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if (0 != Translate->x || 0 != Translate->y)
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{
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for (CurrentRect = RectEnum->arcl; CurrentRect < RectEnum->arcl + RectEnum->c; CurrentRect++)
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{
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CurrentRect->left += Translate->x;
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CurrentRect->right += Translate->x;
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CurrentRect->top += Translate->y;
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CurrentRect->bottom += Translate->y;
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}
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}
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}
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LONG
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HandleStyles(
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BRUSHOBJ *pbo,
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POINTL* Translate,
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LONG x,
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LONG y,
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LONG deltax,
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LONG deltay,
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LONG dx,
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LONG dy,
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PULONG piStyle)
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{
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PEBRUSHOBJ pebo = (PEBRUSHOBJ)pbo;
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PULONG pulStyles = pebo->pbrush->pStyle;
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ULONG iStyle, cStyles = pebo->pbrush->dwStyleCount;
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LONG diStyle, offStyle, lStyleMax;
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if (cStyles > 0)
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{
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if (deltax > deltay)
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{
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offStyle = (- Translate->x) % pebo->pbrush->ulStyleSize;
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diStyle = dx;
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lStyleMax = x;
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}
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else
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{
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offStyle = (- Translate->y) % pebo->pbrush->ulStyleSize;
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diStyle = dy;
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lStyleMax = y;
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}
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/* Now loop until we have found the style index */
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for (iStyle = 0; offStyle >= pulStyles[iStyle]; iStyle++)
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{
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offStyle -= pulStyles[iStyle];
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}
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if (diStyle > 0)
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{
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lStyleMax += pulStyles[iStyle] - offStyle;
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}
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else
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{
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lStyleMax -= offStyle + 1;
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}
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}
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else
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{
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iStyle = 0;
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lStyleMax = MAX_COORD;
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}
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*piStyle = iStyle;
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return lStyleMax;
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}
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/*
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* Draw a line from top-left to bottom-right
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*/
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void FASTCALL
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NWtoSE(SURFOBJ* OutputObj, CLIPOBJ* Clip,
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BRUSHOBJ* pbo, LONG x, LONG y, LONG deltax, LONG deltay,
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POINTL* Translate)
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{
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int i;
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int error;
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BOOLEAN EnumMore;
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RECTL* ClipRect;
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RECT_ENUM RectEnum;
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ULONG Pixel = pbo->iSolidColor;
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LONG delta;
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PEBRUSHOBJ pebo = (PEBRUSHOBJ)pbo;
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PULONG pulStyles = pebo->pbrush->pStyle;
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ULONG iStyle, cStyles = pebo->pbrush->dwStyleCount;
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LONG lStyleMax;
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lStyleMax = HandleStyles(pbo, Translate, x, y, deltax, deltay, 1, 1, &iStyle);
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CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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delta = max(deltax, deltay);
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i = 0;
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error = delta >> 1;
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while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
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{
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while ((ClipRect < RectEnum.arcl + RectEnum.c /* there's still a current clip rect */
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&& (ClipRect->bottom <= y /* but it's above us */
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|| (ClipRect->top <= y && ClipRect->right <= x))) /* or to the left of us */
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|| EnumMore) /* no current clip rect, but rects left */
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{
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/* Skip to the next clip rect */
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if (RectEnum.arcl + RectEnum.c <= ClipRect)
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{
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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}
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else
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{
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ClipRect++;
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}
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}
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if (ClipRect < RectEnum.arcl + RectEnum.c) /* If there's no current clip rect we're done */
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{
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if ((ClipRect->left <= x && ClipRect->top <= y) && ((iStyle & 1) == 0))
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{
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DibFunctionsForBitmapFormat[OutputObj->iBitmapFormat].DIB_PutPixel(
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OutputObj, x, y, Pixel);
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}
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if (deltax < deltay)
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{
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y++;
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if (y == lStyleMax)
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{
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iStyle = (iStyle + 1) % cStyles;
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lStyleMax = y + pulStyles[iStyle];
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}
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error = error + deltax;
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if (deltay <= error)
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{
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x++;
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error = error - deltay;
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}
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}
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else
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{
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x++;
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if (x == lStyleMax)
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{
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iStyle = (iStyle + 1) % cStyles;
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lStyleMax = x + pulStyles[iStyle];
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}
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error = error + deltay;
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if (deltax <= error)
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{
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y++;
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error = error - deltax;
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}
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}
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i++;
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}
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}
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}
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void FASTCALL
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SWtoNE(SURFOBJ* OutputObj, CLIPOBJ* Clip,
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BRUSHOBJ* pbo, LONG x, LONG y, LONG deltax, LONG deltay,
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POINTL* Translate)
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{
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int i;
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int error;
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BOOLEAN EnumMore;
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RECTL* ClipRect;
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RECT_ENUM RectEnum;
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ULONG Pixel = pbo->iSolidColor;
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LONG delta;
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PEBRUSHOBJ pebo = (PEBRUSHOBJ)pbo;
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PULONG pulStyles = pebo->pbrush->pStyle;
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ULONG iStyle, cStyles = pebo->pbrush->dwStyleCount;
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LONG lStyleMax;
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lStyleMax = HandleStyles(pbo, Translate, x, y, deltax, deltay, 1, -1, &iStyle);
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CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTUP, 0);
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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delta = max(deltax, deltay);
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i = 0;
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error = delta >> 1;
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while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
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{
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while ((ClipRect < RectEnum.arcl + RectEnum.c
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&& (y < ClipRect->top
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|| (y < ClipRect->bottom && ClipRect->right <= x)))
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|| EnumMore)
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{
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if (RectEnum.arcl + RectEnum.c <= ClipRect)
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{
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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}
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else
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{
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ClipRect++;
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}
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}
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if (ClipRect < RectEnum.arcl + RectEnum.c)
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{
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if ((ClipRect->left <= x && y < ClipRect->bottom) && ((iStyle & 1) == 0))
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{
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DibFunctionsForBitmapFormat[OutputObj->iBitmapFormat].DIB_PutPixel(
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OutputObj, x, y, Pixel);
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}
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if (deltax < deltay)
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{
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y--;
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if (y == lStyleMax)
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{
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iStyle = (iStyle - 1) % cStyles;
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lStyleMax = y - pulStyles[iStyle];
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}
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error = error + deltax;
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if (deltay <= error)
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{
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x++;
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error = error - deltay;
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}
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}
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else
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{
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x++;
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if (x == lStyleMax)
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{
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iStyle = (iStyle + 1) % cStyles;
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lStyleMax = x + pulStyles[iStyle];
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}
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error = error + deltay;
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if (deltax <= error)
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{
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y--;
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error = error - deltax;
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}
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}
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i++;
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}
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}
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}
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void FASTCALL
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NEtoSW(SURFOBJ* OutputObj, CLIPOBJ* Clip,
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BRUSHOBJ* pbo, LONG x, LONG y, LONG deltax, LONG deltay,
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POINTL* Translate)
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{
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int i;
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int error;
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BOOLEAN EnumMore;
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RECTL* ClipRect;
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RECT_ENUM RectEnum;
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ULONG Pixel = pbo->iSolidColor;
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LONG delta;
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PEBRUSHOBJ pebo = (PEBRUSHOBJ)pbo;
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PULONG pulStyles = pebo->pbrush->pStyle;
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ULONG iStyle, cStyles = pebo->pbrush->dwStyleCount;
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LONG lStyleMax;
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lStyleMax = HandleStyles(pbo, Translate, x, y, deltax, deltay, -1, 1, &iStyle);
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CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_LEFTDOWN, 0);
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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delta = max(deltax, deltay);
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i = 0;
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error = delta >> 1;
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while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
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{
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while ((ClipRect < RectEnum.arcl + RectEnum.c
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&& (ClipRect->bottom <= y
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|| (ClipRect->top <= y && x < ClipRect->left)))
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|| EnumMore)
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{
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if (RectEnum.arcl + RectEnum.c <= ClipRect)
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{
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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}
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else
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{
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ClipRect++;
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}
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}
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if (ClipRect < RectEnum.arcl + RectEnum.c)
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{
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if ((x < ClipRect->right && ClipRect->top <= y) && ((iStyle & 1) == 0))
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{
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DibFunctionsForBitmapFormat[OutputObj->iBitmapFormat].DIB_PutPixel(
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OutputObj, x, y, Pixel);
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}
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if (deltax < deltay)
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{
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y++;
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if (y == lStyleMax)
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{
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iStyle = (iStyle + 1) % cStyles;
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lStyleMax = y + pulStyles[iStyle];
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}
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error = error + deltax;
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if (deltay <= error)
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{
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x--;
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error = error - deltay;
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}
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}
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else
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{
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x--;
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if (x == lStyleMax)
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{
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iStyle = (iStyle - 1) % cStyles;
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lStyleMax = x - pulStyles[iStyle];
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}
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error = error + deltay;
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if (deltax <= error)
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{
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y++;
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error = error - deltax;
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}
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}
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i++;
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}
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}
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}
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void FASTCALL
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SEtoNW(SURFOBJ* OutputObj, CLIPOBJ* Clip,
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BRUSHOBJ* pbo, LONG x, LONG y, LONG deltax, LONG deltay,
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POINTL* Translate)
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{
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int i;
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int error;
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BOOLEAN EnumMore;
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RECTL* ClipRect;
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RECT_ENUM RectEnum;
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ULONG Pixel = pbo->iSolidColor;
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LONG delta;
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PEBRUSHOBJ pebo = (PEBRUSHOBJ)pbo;
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PULONG pulStyles = pebo->pbrush->pStyle;
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ULONG iStyle, cStyles = pebo->pbrush->dwStyleCount;
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LONG lStyleMax;
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lStyleMax = HandleStyles(pbo, Translate, x, y, deltax, deltay, -1, -1, &iStyle);
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CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_LEFTUP, 0);
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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delta = max(deltax, deltay);
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i = 0;
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error = delta >> 1;
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while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
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{
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while ((ClipRect < RectEnum.arcl + RectEnum.c
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&& (y < ClipRect->top
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|| (y < ClipRect->bottom && x < ClipRect->left)))
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|| EnumMore)
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{
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if (RectEnum.arcl + RectEnum.c <= ClipRect)
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{
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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TranslateRects(&RectEnum, Translate);
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ClipRect = RectEnum.arcl;
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}
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else
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{
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ClipRect++;
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}
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}
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if (ClipRect < RectEnum.arcl + RectEnum.c)
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{
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if ((x < ClipRect->right && y < ClipRect->bottom) && ((iStyle & 1) == 0))
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{
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DibFunctionsForBitmapFormat[OutputObj->iBitmapFormat].DIB_PutPixel(
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OutputObj, x, y, Pixel);
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}
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if (deltax < deltay)
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{
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y--;
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if (y == lStyleMax)
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{
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iStyle = (iStyle - 1) % cStyles;
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lStyleMax = y - pulStyles[iStyle];
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}
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error = error + deltax;
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if (deltay <= error)
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{
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x--;
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error = error - deltay;
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}
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}
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else
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{
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x--;
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if (x == lStyleMax)
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{
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iStyle = (iStyle - 1) % cStyles;
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lStyleMax = x - pulStyles[iStyle];
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}
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error = error + deltay;
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if (deltax <= error)
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{
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y--;
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error = error - deltax;
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}
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}
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i++;
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}
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}
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}
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/*
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* @implemented
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*/
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BOOL APIENTRY
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EngLineTo(
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_Inout_ SURFOBJ *DestObj,
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_In_ CLIPOBJ *Clip,
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_In_ BRUSHOBJ *pbo,
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_In_ LONG x1,
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_In_ LONG y1,
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_In_ LONG x2,
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_In_ LONG y2,
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_In_opt_ RECTL *RectBounds,
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_In_ MIX mix)
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{
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LONG x, y, deltax, deltay, xchange, ychange, hx, vy;
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ULONG i;
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ULONG Pixel = pbo->iSolidColor;
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SURFOBJ *OutputObj;
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RECTL DestRect;
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POINTL Translate;
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INTENG_ENTER_LEAVE EnterLeave;
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RECT_ENUM RectEnum;
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BOOL EnumMore;
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CLIPOBJ *pcoPriv = NULL;
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PEBRUSHOBJ pebo = (PEBRUSHOBJ)pbo;
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ULONG cStyles = pebo->pbrush->dwStyleCount;
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if (x1 < x2)
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{
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DestRect.left = x1;
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DestRect.right = x2;
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}
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else
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{
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DestRect.left = x2;
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DestRect.right = x1 + 1;
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}
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if (y1 < y2)
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{
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DestRect.top = y1;
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DestRect.bottom = y2;
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}
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else
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{
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DestRect.top = y2;
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DestRect.bottom = y1 + 1;
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}
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if (! IntEngEnter(&EnterLeave, DestObj, &DestRect, FALSE, &Translate, &OutputObj))
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{
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return FALSE;
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}
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if (!Clip)
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{
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Clip = pcoPriv = EngCreateClip();
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if (!Clip)
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{
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return FALSE;
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}
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IntEngUpdateClipRegion((XCLIPOBJ*)Clip, 0, 0, RectBounds);
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}
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x1 += Translate.x;
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x2 += Translate.x;
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y1 += Translate.y;
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y2 += Translate.y;
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x = x1;
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y = y1;
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deltax = x2 - x1;
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deltay = y2 - y1;
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if (0 == deltax && 0 == deltay)
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{
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return TRUE;
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}
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if (deltax < 0)
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{
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xchange = -1;
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deltax = - deltax;
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hx = x2 + 1;
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}
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else
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{
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xchange = 1;
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hx = x1;
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}
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if (deltay < 0)
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{
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ychange = -1;
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deltay = - deltay;
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vy = y2 + 1;
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}
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else
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{
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ychange = 1;
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vy = y1;
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}
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if ((y1 == y2) && (cStyles == 0))
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{
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CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
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do
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{
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EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
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for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top + Translate.y <= y1; i++)
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|
{
|
|
if (y1 < RectEnum.arcl[i].bottom + Translate.y &&
|
|
RectEnum.arcl[i].left + Translate.x <= hx + deltax &&
|
|
hx < RectEnum.arcl[i].right + Translate.x &&
|
|
max(hx, RectEnum.arcl[i].left + Translate.x) <
|
|
min(hx + deltax, RectEnum.arcl[i].right + Translate.x))
|
|
{
|
|
DibFunctionsForBitmapFormat[OutputObj->iBitmapFormat].DIB_HLine(
|
|
OutputObj,
|
|
max(hx, RectEnum.arcl[i].left + Translate.x),
|
|
min(hx + deltax, RectEnum.arcl[i].right + Translate.x),
|
|
y1, Pixel);
|
|
}
|
|
}
|
|
}
|
|
while (EnumMore);
|
|
}
|
|
else if ((x1 == x2) && (cStyles == 0))
|
|
{
|
|
CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
|
|
do
|
|
{
|
|
EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
|
|
for (i = 0; i < RectEnum.c; i++)
|
|
{
|
|
if (RectEnum.arcl[i].left + Translate.x <= x1 &&
|
|
x1 < RectEnum.arcl[i].right + Translate.x &&
|
|
RectEnum.arcl[i].top + Translate.y <= vy + deltay &&
|
|
vy < RectEnum.arcl[i].bottom + Translate.y)
|
|
{
|
|
DibFunctionsForBitmapFormat[OutputObj->iBitmapFormat].DIB_VLine(
|
|
OutputObj, x1,
|
|
max(vy, RectEnum.arcl[i].top + Translate.y),
|
|
min(vy + deltay, RectEnum.arcl[i].bottom + Translate.y),
|
|
Pixel);
|
|
}
|
|
}
|
|
}
|
|
while (EnumMore);
|
|
}
|
|
else
|
|
{
|
|
if (0 < xchange)
|
|
{
|
|
if (0 < ychange)
|
|
{
|
|
NWtoSE(OutputObj, Clip, pbo, x, y, deltax, deltay, &Translate);
|
|
}
|
|
else
|
|
{
|
|
SWtoNE(OutputObj, Clip, pbo, x, y, deltax, deltay, &Translate);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (0 < ychange)
|
|
{
|
|
NEtoSW(OutputObj, Clip, pbo, x, y, deltax, deltay, &Translate);
|
|
}
|
|
else
|
|
{
|
|
SEtoNW(OutputObj, Clip, pbo, x, y, deltax, deltay, &Translate);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pcoPriv)
|
|
{
|
|
EngDeleteClip(pcoPriv);
|
|
}
|
|
|
|
return IntEngLeave(&EnterLeave);
|
|
}
|
|
|
|
BOOL APIENTRY
|
|
IntEngLineTo(SURFOBJ *psoDest,
|
|
CLIPOBJ *ClipObj,
|
|
BRUSHOBJ *pbo,
|
|
LONG x1,
|
|
LONG y1,
|
|
LONG x2,
|
|
LONG y2,
|
|
RECTL *RectBounds,
|
|
MIX Mix)
|
|
{
|
|
BOOLEAN ret;
|
|
SURFACE *psurfDest;
|
|
PEBRUSHOBJ GdiBrush;
|
|
RECTL b;
|
|
|
|
ASSERT(psoDest);
|
|
psurfDest = CONTAINING_RECORD(psoDest, SURFACE, SurfObj);
|
|
ASSERT(psurfDest);
|
|
|
|
GdiBrush = CONTAINING_RECORD(
|
|
pbo,
|
|
EBRUSHOBJ,
|
|
BrushObject);
|
|
ASSERT(GdiBrush);
|
|
ASSERT(GdiBrush->pbrush);
|
|
|
|
if (GdiBrush->pbrush->flAttrs & BR_IS_NULL)
|
|
return TRUE;
|
|
|
|
/* No success yet */
|
|
ret = FALSE;
|
|
|
|
/* Clip lines totally outside the clip region. This is not done as an
|
|
* optimization (there are very few lines drawn outside the region) but
|
|
* as a workaround for what seems to be a problem in the CL54XX driver */
|
|
if (NULL == ClipObj || DC_TRIVIAL == ClipObj->iDComplexity)
|
|
{
|
|
b.left = 0;
|
|
b.right = psoDest->sizlBitmap.cx;
|
|
b.top = 0;
|
|
b.bottom = psoDest->sizlBitmap.cy;
|
|
}
|
|
else
|
|
{
|
|
b = ClipObj->rclBounds;
|
|
}
|
|
if ((x1 < b.left && x2 < b.left) || (b.right <= x1 && b.right <= x2) ||
|
|
(y1 < b.top && y2 < b.top) || (b.bottom <= y1 && b.bottom <= y2))
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
b.left = min(x1, x2);
|
|
b.right = max(x1, x2);
|
|
b.top = min(y1, y2);
|
|
b.bottom = max(y1, y2);
|
|
if (b.left == b.right) b.right++;
|
|
if (b.top == b.bottom) b.bottom++;
|
|
|
|
if (psurfDest->flags & HOOK_LINETO)
|
|
{
|
|
/* Call the driver's DrvLineTo */
|
|
ret = GDIDEVFUNCS(psoDest).LineTo(
|
|
psoDest, ClipObj, pbo, x1, y1, x2, y2, &b, Mix);
|
|
}
|
|
|
|
#if 0
|
|
if (! ret && (psurfDest->flags & HOOK_STROKEPATH))
|
|
{
|
|
/* FIXME: Emulate LineTo using drivers DrvStrokePath and set ret on success */
|
|
}
|
|
#endif
|
|
|
|
if (! ret)
|
|
{
|
|
ret = EngLineTo(psoDest, ClipObj, pbo, x1, y1, x2, y2, RectBounds, Mix);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
BOOL APIENTRY
|
|
IntEngPolyline(SURFOBJ *psoDest,
|
|
CLIPOBJ *Clip,
|
|
BRUSHOBJ *pbo,
|
|
CONST LPPOINT pt,
|
|
LONG dCount,
|
|
MIX Mix)
|
|
{
|
|
LONG i;
|
|
RECTL rect;
|
|
BOOL ret = FALSE;
|
|
|
|
// Draw the Polyline with a call to IntEngLineTo for each segment.
|
|
for (i = 1; i < dCount; i++)
|
|
{
|
|
rect.left = min(pt[i-1].x, pt[i].x);
|
|
rect.top = min(pt[i-1].y, pt[i].y);
|
|
rect.right = max(pt[i-1].x, pt[i].x);
|
|
rect.bottom = max(pt[i-1].y, pt[i].y);
|
|
ret = IntEngLineTo(psoDest,
|
|
Clip,
|
|
pbo,
|
|
pt[i-1].x,
|
|
pt[i-1].y,
|
|
pt[i].x,
|
|
pt[i].y,
|
|
&rect,
|
|
Mix);
|
|
if (!ret)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* EOF */
|