+++ /dev/null
-/*
- * PROJECT: ReactOS VGA display driver
- * LICENSE: GPL - See COPYING in the top level directory
- * FILE: win32ss/drivers/displays/vga/objects/lineto.c
- * PURPOSE:
- * PROGRAMMERS: Copyright (C) 1998-2003 ReactOS Team
- */
-
-#include <vgaddi.h>
-
-/*
- * Draw a line from top-left to bottom-right
- */
-static void FASTCALL
-vgaNWtoSE(
- IN CLIPOBJ* Clip,
- IN BRUSHOBJ* Brush,
- IN LONG x,
- IN LONG y,
- IN LONG deltax,
- IN LONG deltay)
-{
- int i;
- int error;
- BOOLEAN EnumMore;
- PRECTL ClipRect;
- RECT_ENUM RectEnum;
- ULONG Pixel = Brush->iSolidColor;
- LONG delta;
-
- CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- delta = max(deltax, deltay);
- i = 0;
- error = delta / 2;
- while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
- {
- while ((ClipRect < RectEnum.arcl + RectEnum.c /* there's still a current clip rect */
- && (ClipRect->bottom <= y /* but it's above us */
- || (ClipRect->top <= y && ClipRect->right <= x))) /* or to the left of us */
- || EnumMore) /* no current clip rect, but rects left */
- {
- /* Skip to the next clip rect */
- if (RectEnum.arcl + RectEnum.c <= ClipRect)
- {
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- }
- else
- {
- ClipRect++;
- }
- }
- if ( ClipRect < RectEnum.arcl + RectEnum.c ) /* If there's no current clip rect we're done */
- {
- if (ClipRect->left <= x && ClipRect->top <= y)
- vgaPutPixel ( x, y, Pixel );
- if ( deltax < deltay )
- {
- y++;
- error += deltax;
- if ( error >= deltay )
- {
- x++;
- error -= deltay;
- }
- }
- else
- {
- x++;
- error += deltay;
- if ( error >= deltax )
- {
- y++;
- error -= deltax;
- }
- }
- i++;
- }
- }
-}
-
-static void FASTCALL
-vgaSWtoNE(
- IN CLIPOBJ* Clip,
- IN BRUSHOBJ* Brush,
- IN LONG x,
- IN LONG y,
- IN LONG deltax,
- IN LONG deltay)
-{
- int i;
- int error;
- BOOLEAN EnumMore;
- PRECTL ClipRect;
- RECT_ENUM RectEnum;
- ULONG Pixel = Brush->iSolidColor;
- LONG delta;
-
- CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTUP, 0);
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- delta = max(deltax, deltay);
- i = 0;
- error = delta / 2;
- while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
- {
- while ((ClipRect < RectEnum.arcl + RectEnum.c
- && (y < ClipRect->top
- || (y < ClipRect->bottom && ClipRect->right <= x)))
- || EnumMore)
- {
- if (RectEnum.arcl + RectEnum.c <= ClipRect)
- {
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- }
- else
- {
- ClipRect++;
- }
- }
- if (ClipRect < RectEnum.arcl + RectEnum.c)
- {
- if (ClipRect->left <= x && y < ClipRect->bottom)
- vgaPutPixel(x, y, Pixel);
- if (deltax < deltay)
- {
- y--;
- error = error + deltax;
- if (deltay <= error)
- {
- x++;
- error = error - deltay;
- }
- }
- else
- {
- x++;
- error = error + deltay;
- if (deltax <= error)
- {
- y--;
- error = error - deltax;
- }
- }
- i++;
- }
- }
-}
-
-static void FASTCALL
-vgaNEtoSW(
- IN CLIPOBJ* Clip,
- IN BRUSHOBJ* Brush,
- IN LONG x,
- IN LONG y,
- IN LONG deltax,
- IN LONG deltay)
-{
- int i;
- int error;
- BOOLEAN EnumMore;
- PRECTL ClipRect;
- RECT_ENUM RectEnum;
- ULONG Pixel = Brush->iSolidColor;
- LONG delta;
-
- CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_LEFTDOWN, 0);
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- delta = max(deltax, deltay);
- i = 0;
- error = delta / 2;
- while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
- {
- while ((ClipRect < RectEnum.arcl + RectEnum.c
- && (ClipRect->bottom <= y
- || (ClipRect->top <= y && x < ClipRect->left)))
- || EnumMore)
- {
- if (RectEnum.arcl + RectEnum.c <= ClipRect)
- {
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- }
- else
- {
- ClipRect++;
- }
- }
- if (ClipRect < RectEnum.arcl + RectEnum.c)
- {
- if (x < ClipRect->right && ClipRect->top <= y)
- vgaPutPixel(x, y, Pixel);
- if (deltax < deltay)
- {
- y++;
- error = error + deltax;
- if (deltay <= error)
- {
- x--;
- error = error - deltay;
- }
- }
- else
- {
- x--;
- error = error + deltay;
- if (deltax <= error)
- {
- y++;
- error = error - deltax;
- }
- }
- i++;
- }
- }
-}
-
-static void FASTCALL
-vgaSEtoNW(
- IN CLIPOBJ* Clip,
- IN BRUSHOBJ* Brush,
- IN LONG x,
- IN LONG y,
- IN LONG deltax,
- IN LONG deltay)
-{
- int i;
- int error;
- BOOLEAN EnumMore;
- PRECTL ClipRect;
- RECT_ENUM RectEnum;
- ULONG Pixel = Brush->iSolidColor;
- LONG delta;
-
- CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_LEFTUP, 0);
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- delta = max(deltax, deltay);
- i = 0;
- error = delta / 2;
- while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
- {
- while ((ClipRect < RectEnum.arcl + RectEnum.c
- && (y < ClipRect->top
- || (y < ClipRect->bottom && x < ClipRect->left)))
- || EnumMore)
- {
- if (RectEnum.arcl + RectEnum.c <= ClipRect)
- {
- EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
- ClipRect = RectEnum.arcl;
- }
- else
- {
- ClipRect++;
- }
- }
- if (ClipRect < RectEnum.arcl + RectEnum.c)
- {
- if (x < ClipRect->right && y < ClipRect->bottom)
- vgaPutPixel(x, y, Pixel);
- if (deltax < deltay)
- {
- y--;
- error = error + deltax;
- if (deltay <= error)
- {
- x--;
- error = error - deltay;
- }
- }
- else
- {
- x--;
- error = error + deltay;
- if (deltax <= error)
- {
- y--;
- error = error - deltax;
- }
- }
- i++;
- }
- }
-}
-
-/*
- * FIXME: Use Mix to perform ROPs
- * FIXME: Non-solid Brush
- */
-BOOL APIENTRY
-DrvLineTo(
- IN SURFOBJ *DestObj,
- IN CLIPOBJ *Clip,
- IN BRUSHOBJ *Brush,
- IN LONG x1,
- IN LONG y1,
- IN LONG x2,
- IN LONG y2,
- IN RECTL *RectBounds,
- IN MIX mix)
-{
- LONG x, y, deltax, deltay, xchange, ychange, hx, vy;
- ULONG i;
- ULONG Pixel = Brush->iSolidColor;
- RECT_ENUM RectEnum;
- BOOL EnumMore;
-
- x = x1;
- y = y1;
- deltax = x2 - x1;
- deltay = y2 - y1;
-
- if (deltax < 0)
- {
- xchange = -1;
- deltax = - deltax;
- hx = x2+1;
- //x--;
- }
- else
- {
- xchange = 1;
- hx = x1;
- }
-
- if (deltay < 0)
- {
- ychange = -1;
- deltay = - deltay;
- vy = y2+1;
- //y--;
- }
- else
- {
- ychange = 1;
- vy = y1;
- }
-
- if (y1 == y2)
- {
- CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, 0);
- do
- {
- EnumMore = CLIPOBJ_bEnum(Clip, sizeof(RectEnum), (PVOID) &RectEnum);
- for (i = 0; i < RectEnum.c && RectEnum.arcl[i].top <= y1; i++)
- {
- if (y1 < RectEnum.arcl[i].bottom &&
- RectEnum.arcl[i].left <= hx + deltax &&
- hx < RectEnum.arcl[i].right)
- {
- vgaHLine(max(hx, RectEnum.arcl[i].left), y1,
- min(hx + deltax, RectEnum.arcl[i].right)
- -max(hx, RectEnum.arcl[i].left), Pixel);
- }
- }
- } while (EnumMore);
- }
- else if (x1 == x2)
- {
- 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 <= x1 &&
- x1 < RectEnum.arcl[i].right &&
- RectEnum.arcl[i].top <= vy + deltay &&
- vy < RectEnum.arcl[i].bottom)
- {
- vgaVLine(x1,
- max(vy, RectEnum.arcl[i].top),
- min(vy + deltay, RectEnum.arcl[i].bottom)
- - max(vy, RectEnum.arcl[i].top),
- Pixel);
- }
- }
- } while (EnumMore);
- }
- else
- {
- if (0 < xchange)
- {
- if (0 < ychange)
- vgaNWtoSE(Clip, Brush, x, y, deltax, deltay);
- else
- vgaSWtoNE(Clip, Brush, x, y, deltax, deltay);
- }
- else
- {
- if (0 < ychange)
- vgaNEtoSW(Clip, Brush, x, y, deltax, deltay);
- else
- vgaSEtoNW(Clip, Brush, x, y, deltax, deltay);
- }
- }
-
- return TRUE;
-}
-
-/* EOF */
projects / reactos.git / blobdiff