+/*
+ * ReactOS VGA driver
+ * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id$
+ */
+
#include "../vgaddi.h"
#include "../vgavideo/vgavideo.h"
+/*
+ * Draw a line from top-left to bottom-right
+ */
+static void FASTCALL
+vgaNWtoSE(PCLIPOBJ Clip, PBRUSHOBJ Brush, LONG x, LONG y, LONG deltax, 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, ENUM_RECT_LIMIT);
+ 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(PCLIPOBJ Clip, PBRUSHOBJ Brush, LONG x, LONG y, LONG deltax, 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, ENUM_RECT_LIMIT);
+ 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(PCLIPOBJ Clip, PBRUSHOBJ Brush, LONG x, LONG y, LONG deltax, 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, ENUM_RECT_LIMIT);
+ 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(PCLIPOBJ Clip, PBRUSHOBJ Brush, LONG x, LONG y, LONG deltax, 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, ENUM_RECT_LIMIT);
+ 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 STDCALL
-DrvLineTo(SURFOBJ *Surface,
+DrvLineTo(SURFOBJ *DestObj,
CLIPOBJ *Clip,
BRUSHOBJ *Brush,
LONG x1,
LONG y2,
RECTL *RectBounds,
MIX mix)
-
-// FIXME: Use ClipObj and RectBounds to clip the line where required
-// FIXME: Use Mix to perform ROPs
-
{
- LONG deltax, deltay, x, y, d, i, xchange, ychange, error, iSolidColor, hx, vy;
-
- iSolidColor = Brush->iSolidColor; // FIXME: Brush Realization...
-
- // FIXME: Implement clipping
+ LONG x, y, deltax, deltay, i, xchange, ychange, hx, vy;
+ ULONG Pixel = Brush->iSolidColor;
+ RECTL DestRect;
+ RECT_ENUM RectEnum;
+ BOOL EnumMore;
x = x1;
y = y1;
if (deltax < 0)
{
- xchange = -1;
- deltax = - deltax;
- hx = x2;
- x--;
+ xchange = -1;
+ deltax = - deltax;
+ hx = x2+1;
+ //x--;
}
else
{
- xchange = 1;
- hx = x1;
+ xchange = 1;
+ hx = x1;
}
if (deltay < 0)
{
- ychange = -1;
- deltay = - deltay;
- vy = y2;
- y--;
+ ychange = -1;
+ deltay = - deltay;
+ vy = y2+1;
+ //y--;
}
else
{
- ychange = 1;
- vy = y1;
- };
+ ychange = 1;
+ vy = y1;
+ }
if (y1 == y2)
{
- return vgaHLine(hx, y1, deltax, iSolidColor);
+ CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, ENUM_RECT_LIMIT);
+ do
+ {
+ EnumMore = CLIPOBJ_bEnum(Clip, (ULONG) 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);
}
- if (x1 == x2)
+ else if (x1 == x2)
{
- return vgaVLine(x1, vy, deltay, iSolidColor);
+ CLIPOBJ_cEnumStart(Clip, FALSE, CT_RECTANGLES, CD_RIGHTDOWN, ENUM_RECT_LIMIT);
+ 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);
}
-
- // Using individual pixels to draw a line neither horizontal or vertical
- // Set up the VGA masking for individual pixels
-
- error = 0;
-
- if (deltax < deltay)
+ else
{
- for (i = 0; i < deltay; i++)
- {
- vgaPutPixel(x, y, iSolidColor);
- y = y + ychange;
- error = error + deltax;
-
- if (deltay <= error)
- {
- x = x + xchange;
- error = error - deltay;
- }
- }
+ 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);
+ }
+ }
}
- else
- {
- for (i = 0; i < deltax; i++)
- {
- vgaPutPixel(x, y, iSolidColor);
- x = x + xchange;
- error = error + deltay;
- if (deltax <= error)
- {
- y = y + ychange;
- error = error - deltax;
- }
- }
- }
-
- return TRUE;
+
+ return TRUE;
}
+
+/* EOF */
git://git.jankratochvil.net / reactos.git / blobdiff