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https://github.com/reactos/reactos.git
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[CONSRV] ConDrvScrollConsoleScreenBuffer() fixes. (#2278)
- Reimplement ConDrvScrollConsoleScreenBuffer() with separate copy and fill helper functions and calculate rectangles in such a way as to never use X-Y coordinates pointing outside of the screen buffer. - Add X-Y coordinates assertions in ConioCoordToPointer().
This commit is contained in:
Hermès Bélusca-Maïto
parent
d46e054368
commit
05053b6f18
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@ -143,6 +143,8 @@ TEXTMODE_BUFFER_Destroy(IN OUT PCONSOLE_SCREEN_BUFFER Buffer)
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PCHAR_INFO
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ConioCoordToPointer(PTEXTMODE_SCREEN_BUFFER Buff, ULONG X, ULONG Y)
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{
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ASSERT(X < Buff->ScreenBufferSize.X);
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ASSERT(Y < Buff->ScreenBufferSize.Y);
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return &Buff->Buffer[((Y + Buff->VirtualY) % Buff->ScreenBufferSize.Y) * Buff->ScreenBufferSize.X + X];
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}
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@ -185,78 +187,166 @@ ConioComputeUpdateRect(IN PTEXTMODE_SCREEN_BUFFER Buff,
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}
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/*
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* Move from one rectangle to another. We must be careful about the order that
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* this is done, to avoid overwriting parts of the source before they are moved.
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* Copy from one rectangle to another. We must be careful about the order of
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* operations, to avoid overwriting parts of the source before they are copied.
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*/
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static VOID
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ConioMoveRegion(PTEXTMODE_SCREEN_BUFFER ScreenBuffer,
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PSMALL_RECT SrcRegion,
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PSMALL_RECT DstRegion,
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PSMALL_RECT ClipRegion,
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CHAR_INFO FillChar)
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ConioCopyRegion(
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IN PTEXTMODE_SCREEN_BUFFER ScreenBuffer,
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IN PSMALL_RECT SrcRegion,
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IN PCOORD DstOrigin)
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{
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UINT Width = ConioRectWidth(SrcRegion);
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UINT Height = ConioRectHeight(SrcRegion);
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INT SXOrg, SX, SY;
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INT DXOrg, DX, DY;
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INT XDelta, YDelta;
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UINT Width, Height;
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SHORT SY, DY;
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SHORT YDelta;
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PCHAR_INFO PtrSrc, PtrDst;
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#if 0
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SHORT SXOrg, DXOrg;
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SHORT SX, DX;
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SHORT XDelta;
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UINT i, j;
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CHAR_INFO Cell;
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PCHAR_INFO SRow, DRow;
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#endif
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if (ConioIsRectEmpty(SrcRegion))
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return;
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#if 0
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ASSERT(SrcRegion->Left >= 0 && SrcRegion->Left < ScreenBuffer->ScreenBufferSize.X);
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ASSERT(SrcRegion->Right >= 0 && SrcRegion->Right < ScreenBuffer->ScreenBufferSize.X);
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ASSERT(SrcRegion->Top >= 0 && SrcRegion->Top < ScreenBuffer->ScreenBufferSize.Y);
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ASSERT(SrcRegion->Bottom >= 0 && SrcRegion->Bottom < ScreenBuffer->ScreenBufferSize.Y);
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// ASSERT(DstOrigin->X >= 0 && DstOrigin->X < ScreenBuffer->ScreenBufferSize.X);
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// ASSERT(DstOrigin->Y >= 0 && DstOrigin->Y < ScreenBuffer->ScreenBufferSize.Y);
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#endif
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/* If the source and destination regions are the same, just bail out */
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if ((SrcRegion->Left == DstOrigin->X) && (SrcRegion->Top == DstOrigin->Y))
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return;
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SY = SrcRegion->Top;
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DY = DstRegion->Top;
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DY = DstOrigin->Y;
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YDelta = 1;
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if (SY < DY)
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{
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/* Moving down: work from bottom up */
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SY = SrcRegion->Bottom;
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DY = DstRegion->Bottom;
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DY = DstOrigin->Y + (SrcRegion->Bottom - SrcRegion->Top);
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YDelta = -1;
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}
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#if 0
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SXOrg = SrcRegion->Left;
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DXOrg = DstRegion->Left;
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DXOrg = DstOrigin->X;
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XDelta = 1;
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if (SXOrg < DXOrg)
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{
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/* Moving right: work from right to left */
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SXOrg = SrcRegion->Right;
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DXOrg = DstRegion->Right;
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DXOrg = DstOrigin->X + (SrcRegion->Right - SrcRegion->Left);
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XDelta = -1;
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}
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#endif
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for (i = 0; i < Height; i++)
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/* Loop through the source region */
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Width = ConioRectWidth(SrcRegion);
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Height = ConioRectHeight(SrcRegion);
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#if 0
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for (i = 0; i < Height; ++i, SY += YDelta, DY += YDelta)
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#else
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for (; Height-- > 0; SY += YDelta, DY += YDelta)
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#endif
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{
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SRow = ConioCoordToPointer(ScreenBuffer, 0, SY);
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DRow = ConioCoordToPointer(ScreenBuffer, 0, DY);
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#if 0
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SX = SXOrg;
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DX = DXOrg;
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// TODO: Correctly support "moving" full-width characters.
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PtrSrc = ConioCoordToPointer(ScreenBuffer, SX, SY);
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PtrDst = ConioCoordToPointer(ScreenBuffer, DX, DY);
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#else
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PtrSrc = ConioCoordToPointer(ScreenBuffer, SrcRegion->Left, SY);
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PtrDst = ConioCoordToPointer(ScreenBuffer, DstOrigin->X, DY);
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#endif
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for (j = 0; j < Width; j++)
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// TODO: Correctly support copying full-width characters.
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// By construction the source region is supposed to contain valid
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// (possibly fullwidth) characters, so for these after the copy
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// we need to check the characters at the borders and adjust the
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// attributes accordingly.
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#if 0
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for (j = 0; j < Width; ++j, SX += XDelta, DX += XDelta)
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{
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Cell = SRow[SX];
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if (SX >= ClipRegion->Left && SX <= ClipRegion->Right &&
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SY >= ClipRegion->Top && SY <= ClipRegion->Bottom)
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{
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SRow[SX] = FillChar;
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}
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if (DX >= ClipRegion->Left && DX <= ClipRegion->Right &&
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DY >= ClipRegion->Top && DY <= ClipRegion->Bottom)
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{
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DRow[DX] = Cell;
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}
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SX += XDelta;
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DX += XDelta;
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*PtrDst = *PtrSrc;
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PtrSrc += XDelta;
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PtrDst += XDelta;
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}
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SY += YDelta;
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DY += YDelta;
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#else
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/* RtlMoveMemory() takes into account for the direction of the copy */
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RtlMoveMemory(PtrDst, PtrSrc, Width * sizeof(CHAR_INFO));
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#endif
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}
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}
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static VOID
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ConioFillRegion(
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IN PTEXTMODE_SCREEN_BUFFER ScreenBuffer,
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IN PSMALL_RECT Region,
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IN PSMALL_RECT ExcludeRegion OPTIONAL,
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IN CHAR_INFO FillChar)
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{
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SHORT X, Y;
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PCHAR_INFO Ptr;
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// BOOLEAN bFullwidth;
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/* Bail out if the region to fill is empty */
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if (ConioIsRectEmpty(Region))
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return;
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/* Sanitize the exclusion region: if it's empty, ignore the region */
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if (ExcludeRegion && ConioIsRectEmpty(ExcludeRegion))
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ExcludeRegion = NULL;
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#if 0
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ASSERT(Region->Left >= 0 && Region->Left < ScreenBuffer->ScreenBufferSize.X);
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ASSERT(Region->Right >= 0 && Region->Right < ScreenBuffer->ScreenBufferSize.X);
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ASSERT(Region->Top >= 0 && Region->Top < ScreenBuffer->ScreenBufferSize.Y);
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ASSERT(Region->Bottom >= 0 && Region->Bottom < ScreenBuffer->ScreenBufferSize.Y);
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if (ExcludeRegion)
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{
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ASSERT(ExcludeRegion->Left >= 0 && ExcludeRegion->Left < ScreenBuffer->ScreenBufferSize.X);
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ASSERT(ExcludeRegion->Right >= 0 && ExcludeRegion->Right < ScreenBuffer->ScreenBufferSize.X);
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ASSERT(ExcludeRegion->Top >= 0 && ExcludeRegion->Top < ScreenBuffer->ScreenBufferSize.Y);
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ASSERT(ExcludeRegion->Bottom >= 0 && ExcludeRegion->Bottom < ScreenBuffer->ScreenBufferSize.Y);
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}
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#endif
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// bFullwidth = (ScreenBuffer->Header.Console->IsCJK && IS_FULL_WIDTH(FillChar.Char.UnicodeChar));
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/* Loop through the destination region */
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for (Y = Region->Top; Y <= Region->Bottom; ++Y)
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{
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Ptr = ConioCoordToPointer(ScreenBuffer, Region->Left, Y);
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for (X = Region->Left; X <= Region->Right; ++X)
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{
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// TODO: Correctly support filling with full-width characters.
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if (!ExcludeRegion ||
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!(X >= ExcludeRegion->Left && X <= ExcludeRegion->Right &&
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Y >= ExcludeRegion->Top && Y <= ExcludeRegion->Bottom))
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{
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/* We are outside the excluded region, fill the destination */
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*Ptr = FillChar;
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// Ptr->Attributes &= ~COMMON_LVB_SBCSDBCS;
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}
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++Ptr;
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}
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}
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}
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// FIXME!
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NTSTATUS NTAPI
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ConDrvWriteConsoleInput(IN PCONSOLE Console,
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@ -1366,24 +1456,25 @@ ConDrvSetConsoleScreenBufferSize(IN PCONSOLE Console,
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}
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NTSTATUS NTAPI
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ConDrvScrollConsoleScreenBuffer(IN PCONSOLE Console,
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IN PTEXTMODE_SCREEN_BUFFER Buffer,
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IN BOOLEAN Unicode,
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IN PSMALL_RECT ScrollRectangle,
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IN BOOLEAN UseClipRectangle,
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IN PSMALL_RECT ClipRectangle OPTIONAL,
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IN PCOORD DestinationOrigin,
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IN CHAR_INFO FillChar)
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ConDrvScrollConsoleScreenBuffer(
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IN PCONSOLE Console,
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IN PTEXTMODE_SCREEN_BUFFER Buffer,
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IN BOOLEAN Unicode,
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IN PSMALL_RECT ScrollRectangle,
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IN BOOLEAN UseClipRectangle,
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IN PSMALL_RECT ClipRectangle OPTIONAL,
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IN PCOORD DestinationOrigin,
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IN CHAR_INFO FillChar)
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{
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COORD CapturedDestinationOrigin;
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SMALL_RECT ScreenBuffer;
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SMALL_RECT CapturedClipRectangle;
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SMALL_RECT SrcRegion;
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SMALL_RECT DstRegion;
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SMALL_RECT UpdateRegion;
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SMALL_RECT CapturedClipRectangle;
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if (Console == NULL || Buffer == NULL || ScrollRectangle == NULL ||
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(UseClipRectangle ? ClipRectangle == NULL : FALSE) || DestinationOrigin == NULL)
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(UseClipRectangle && (ClipRectangle == NULL)) || DestinationOrigin == NULL)
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{
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return STATUS_INVALID_PARAMETER;
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}
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@ -1404,14 +1495,14 @@ ConDrvScrollConsoleScreenBuffer(IN PCONSOLE Console,
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/* If the source was clipped on the left or top, adjust the destination accordingly */
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if (ScrollRectangle->Left < 0)
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{
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CapturedDestinationOrigin.X -= ScrollRectangle->Left;
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}
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if (ScrollRectangle->Top < 0)
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{
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CapturedDestinationOrigin.Y -= ScrollRectangle->Top;
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}
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/*
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* If a clip rectangle is provided, clip it to the screen buffer,
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* otherwise use the latter one as the clip rectangle.
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*/
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if (UseClipRectangle)
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{
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CapturedClipRectangle = *ClipRectangle;
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@ -1425,14 +1516,44 @@ ConDrvScrollConsoleScreenBuffer(IN PCONSOLE Console,
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CapturedClipRectangle = ScreenBuffer;
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}
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/*
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* Windows compatibility: Do nothing if the intersection of the source region
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* with the clip rectangle is empty, even if the intersection of destination
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* region with the clip rectangle is NOT empty and therefore it would have
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* been possible to copy contents to it...
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*/
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if (!ConioGetIntersection(&UpdateRegion, &SrcRegion, &CapturedClipRectangle))
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{
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return STATUS_SUCCESS;
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}
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/* Initialize the destination rectangle, of same size as the source rectangle */
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ConioInitRect(&DstRegion,
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CapturedDestinationOrigin.Y,
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CapturedDestinationOrigin.X,
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CapturedDestinationOrigin.Y + ConioRectHeight(&SrcRegion) - 1,
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CapturedDestinationOrigin.X + ConioRectWidth(&SrcRegion ) - 1);
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if (ConioGetIntersection(&DstRegion, &DstRegion, &CapturedClipRectangle))
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{
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/*
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* Build the region image, within the source region,
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* of the destination region we should copy into.
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*/
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SrcRegion.Left += DstRegion.Left - CapturedDestinationOrigin.X;
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SrcRegion.Top += DstRegion.Top - CapturedDestinationOrigin.Y;
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SrcRegion.Right = SrcRegion.Left + (DstRegion.Right - DstRegion.Left);
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SrcRegion.Bottom = SrcRegion.Top + (DstRegion.Bottom - DstRegion.Top);
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/* Do the copy */
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CapturedDestinationOrigin.X = DstRegion.Left;
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CapturedDestinationOrigin.Y = DstRegion.Top;
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ConioCopyRegion(Buffer, &SrcRegion, &CapturedDestinationOrigin);
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}
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if (!Unicode)
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{
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/* Conversion from the ASCII char to the UNICODE char */
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WCHAR tmp;
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ConsoleOutputAnsiToUnicodeChar(Console, &tmp, &FillChar.Char.AsciiChar);
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FillChar.Char.UnicodeChar = tmp;
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@ -1440,11 +1561,15 @@ ConDrvScrollConsoleScreenBuffer(IN PCONSOLE Console,
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/* Sanitize the attribute */
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FillChar.Attributes &= ~COMMON_LVB_SBCSDBCS;
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ConioMoveRegion(Buffer, &SrcRegion, &DstRegion, &CapturedClipRectangle, FillChar);
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/*
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* Fill the intersection (== UpdateRegion) of the source region with the
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* clip rectangle, excluding the destination region.
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*/
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ConioFillRegion(Buffer, &UpdateRegion, &DstRegion, FillChar);
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if ((PCONSOLE_SCREEN_BUFFER)Buffer == Console->ActiveBuffer)
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{
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ConioGetUnion(&UpdateRegion, &SrcRegion, &DstRegion);
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ConioGetUnion(&UpdateRegion, &UpdateRegion, &DstRegion);
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if (ConioGetIntersection(&UpdateRegion, &UpdateRegion, &CapturedClipRectangle))
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{
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/* Draw update region */
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