571 lines
14 KiB
C
571 lines
14 KiB
C
/******************************************************************************\
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*
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* $Workfile: stripio.c $
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*
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* Do what you can with no line support.
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*
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* I implemented the horizontal and vertical strip functions using
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* solid fills, and removed the usage of diagonal strips. With a little
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* effort you could implement diagonal strips by doing solid fills while
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* playing with lDelta. This is probably not worth the trouble.
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*
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* Copyright (c) 1992-1995 Microsoft Corporation
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* Copyright (c) 1996 Cirrus Logic, Inc.
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*
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* $Log: S:/projects/drivers/ntsrc/display/stripio.c_v $
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*
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* Rev 1.1 Oct 10 1996 15:39:12 unknown
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*
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*
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* Rev 1.1 12 Aug 1996 16:55:04 frido
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* Removed unaccessed local variables.
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*
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\******************************************************************************/
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#include "precomp.h"
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#define IO_DRAW_HORZ_STRIP(xy, cx, lDelta, cBpp)\
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{\
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ULONG ulDstAddr;\
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\
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ulDstAddr = xy;\
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\
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CP_IO_WAIT_FOR_BLT_COMPLETE(ppdev, pjPorts);\
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CP_IO_XCNT(ppdev, pjPorts, (PELS_TO_BYTES(cx) - 1));\
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CP_IO_YCNT(ppdev, pjPorts, 0);\
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CP_IO_DST_ADDR(ppdev, pjPorts, ulDstAddr);\
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CP_IO_START_BLT(ppdev, pjPorts);\
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}
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#define IO_DRAW_VERT_STRIP(xy, cy, lDelta, cBpp)\
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{\
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ULONG ulDstAddr;\
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\
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ulDstAddr = xy;\
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\
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CP_IO_WAIT_FOR_BLT_COMPLETE(ppdev, pjPorts);\
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CP_IO_XCNT(ppdev, pjPorts, (cBpp - 1));\
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CP_IO_YCNT(ppdev, pjPorts, (cy - 1));\
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CP_IO_DST_ADDR(ppdev, pjPorts, ulDstAddr);\
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CP_IO_START_BLT(ppdev, pjPorts);\
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}
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#define IO_DRAW_VERT_STRIP_FLIPPED(xy, cy, lDelta, cBpp)\
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{\
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ULONG ulDstAddr;\
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\
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ulDstAddr = xy - ((cy - 1) * lDelta);\
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\
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CP_IO_WAIT_FOR_BLT_COMPLETE(ppdev, pjPorts);\
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CP_IO_XCNT(ppdev, pjPorts, (cBpp - 1));\
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CP_IO_YCNT(ppdev, pjPorts, (cy - 1));\
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CP_IO_DST_ADDR(ppdev, pjPorts, ulDstAddr);\
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CP_IO_START_BLT(ppdev, pjPorts);\
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}
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/******************************Public*Routine******************************\
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* VOID vIoSolidHorizontal
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*
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* Draws left-to-right x-major near-horizontal lines using solid fills.
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*
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* Assumes fgRop, BgRop, and Color are already set correctly.
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*
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\**************************************************************************/
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VOID vIoSolidHorizontal(
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PDEV* ppdev,
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STRIP* pStrip,
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LINESTATE* pLineState)
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{
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BYTE* pjPorts = ppdev->pjPorts;
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LONG cBpp = ppdev->cBpp;
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LONG lDelta = ppdev->lDelta;
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LONG cStrips = pStrip->cStrips;
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PLONG pStrips = pStrip->alStrips;
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LONG x = pStrip->ptlStart.x;
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LONG y = pStrip->ptlStart.y;
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LONG xy = PELS_TO_BYTES(x) + (lDelta * y);
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LONG yInc = 1;
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LONG i;
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DISPDBG((2,"vIoSolidHorizontal"));
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if (!(pStrip->flFlips & FL_FLIP_V))
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{
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//
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// Horizontal strips ->
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// ->
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//
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for (i = 0; i < cStrips; i++)
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{
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IO_DRAW_HORZ_STRIP(xy, *pStrips, lDelta, cBpp);
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x += *pStrips;
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xy += PELS_TO_BYTES(*pStrips); // x+
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xy += lDelta; // y+
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pStrips++;
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}
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y += cStrips;
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}
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else
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{
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//
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// ->
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// Horizontal strips ->
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//
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for (i = 0; i < cStrips; i++)
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{
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IO_DRAW_HORZ_STRIP(xy, *pStrips, lDelta, cBpp);
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x += *pStrips;
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xy += PELS_TO_BYTES(*pStrips); // x+
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xy -= lDelta; // y+
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pStrips++;
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}
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y -= cStrips;
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}
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pStrip->ptlStart.x = x;
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pStrip->ptlStart.y = y;
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}
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/******************************Public*Routine******************************\
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* VOID vIoSolidVertical
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*
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* Draws left-to-right y-major near-vertical lines using solid fills.
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*
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\**************************************************************************/
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VOID vIoSolidVertical(
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PDEV* ppdev,
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STRIP* pStrip,
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LINESTATE* pLineState)
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{
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BYTE* pjPorts = ppdev->pjPorts;
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LONG cBpp = ppdev->cBpp;
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LONG lDelta = ppdev->lDelta;
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LONG cStrips = pStrip->cStrips;
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PLONG pStrips = pStrip->alStrips;
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LONG x = pStrip->ptlStart.x;
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LONG y = pStrip->ptlStart.y;
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LONG xy = PELS_TO_BYTES(x) + (lDelta * y);
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LONG i;
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DISPDBG((2,"vIoSolidVertical"));
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if (!(pStrip->flFlips & FL_FLIP_V))
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{
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//
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// |
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// Vertical strips v
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// |
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// v
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//
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for (i = 0; i < cStrips; i++)
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{
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IO_DRAW_VERT_STRIP(xy, *pStrips, lDelta, cBpp);
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y += *pStrips;
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xy += cBpp; // x+
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xy += (*pStrips * lDelta); // y+
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pStrips++;
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}
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}
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else
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{
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//
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// ^
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// Vertical strips |
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// ^
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// |
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//
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for (i = 0; i < cStrips; i++)
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{
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IO_DRAW_VERT_STRIP_FLIPPED(xy, *pStrips, lDelta, cBpp);
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y -= *pStrips;
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xy += cBpp; // x+
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xy -= (*pStrips * lDelta); // y-
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pStrips++;
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}
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}
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x += cStrips;
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pStrip->ptlStart.x = x;
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pStrip->ptlStart.y = y;
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}
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/******************************Public*Routine******************************\
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* VOID vIoStyledHorizontal
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*
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* Takes the list of strips that define the pixels that would be lit for
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* a solid line, and breaks them into styling chunks according to the
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* styling information that is passed in.
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*
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* This particular routine handles x-major lines that run left-to-right,
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* and are comprised of horizontal strips. It draws the dashes using
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* short-stroke vectors.
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*
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* The performance of this routine could be improved significantly if
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* anyone cared enough about styled lines improve it.
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*
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\**************************************************************************/
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VOID vIoStyledHorizontal(
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PDEV* ppdev,
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STRIP* pstrip,
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LINESTATE* pls)
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{
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BYTE* pjPorts = ppdev->pjPorts;
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LONG cBpp = ppdev->cBpp;
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LONG lDelta = ppdev->lDelta;
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LONG x = pstrip->ptlStart.x; // x position of start of first strip
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LONG y = pstrip->ptlStart.y; // y position of start of first strip
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LONG xy = PELS_TO_BYTES(x) + (lDelta * y);
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LONG* plStrip = pstrip->alStrips; // Points to current strip
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LONG cStrips = pstrip->cStrips; // Total number of strips we'll do
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LONG dy;
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LONG dylDelta;
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LONG cStyle;
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LONG cStrip;
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LONG cThis;
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ULONG bIsGap;
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if (pstrip->flFlips & FL_FLIP_V)
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{
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// The minor direction of the line is 90 degrees, and the major
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// direction is 0 (it's a left-to-right x-major line going up):
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dy = -1;
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dylDelta = -lDelta;
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}
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else
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{
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// The minor direction of the line is 270 degrees, and the major
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// direction is 0 (it's a left-to-right x-major line going down):
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dy = 1;
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dylDelta = lDelta;
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}
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cStrip = *plStrip; // Number of pels in first strip
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cStyle = pls->spRemaining; // Number of pels in first 'gap' or 'dash'
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bIsGap = pls->ulStyleMask; // Tells whether in a 'gap' or a 'dash'
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// ulStyleMask is non-zero if we're in the middle of a 'gap',
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// and zero if we're in the middle of a 'dash':
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if (bIsGap)
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goto SkipAGap;
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else
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goto OutputADash;
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PrepareToSkipAGap:
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// Advance in the style-state array, so that we can find the next
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// 'dot' that we'll have to display:
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bIsGap = ~bIsGap;
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pls->psp++;
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if (pls->psp > pls->pspEnd)
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pls->psp = pls->pspStart;
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cStyle = *pls->psp;
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// If 'cStrip' is zero, we also need a new strip:
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if (cStrip != 0)
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goto SkipAGap;
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// Here, we're in the middle of a 'gap' where we don't have to
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// display anything. We simply cycle through all the strips
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// we can, keeping track of the current position, until we run
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// out of 'gap':
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while (TRUE)
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{
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// Each time we loop, we move to a new scan and need a new strip:
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y += dy;
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xy += dylDelta;
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plStrip++;
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cStrips--;
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if (cStrips == 0)
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goto AllDone;
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cStrip = *plStrip;
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SkipAGap:
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cThis = min(cStrip, cStyle);
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cStyle -= cThis;
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cStrip -= cThis;
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x += cThis;
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xy += PELS_TO_BYTES(cThis);
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if (cStyle == 0)
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goto PrepareToOutputADash;
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}
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PrepareToOutputADash:
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// Advance in the style-state array, so that we can find the next
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// 'dot' that we'll have to display:
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bIsGap = ~bIsGap;
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pls->psp++;
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if (pls->psp > pls->pspEnd)
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pls->psp = pls->pspStart;
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cStyle = *pls->psp;
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// If 'cStrip' is zero, we also need a new strip.
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if (cStrip != 0)
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{
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// There's more to be done in the current strip:
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goto OutputADash;
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}
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// We've finished with the current strip:
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while (TRUE)
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{
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// Each time we loop, we move to a new scan and need a new strip:
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y += dy;
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xy += dylDelta;
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plStrip++;
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cStrips--;
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if (cStrips == 0)
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goto AllDone;
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cStrip = *plStrip;
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OutputADash:
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cThis = min(cStrip, cStyle);
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cStyle -= cThis;
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cStrip -= cThis;
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IO_DRAW_HORZ_STRIP(xy, cThis, lDelta, cBpp);
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x += cThis;
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xy += PELS_TO_BYTES(cThis); // x+
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if (cStyle == 0)
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goto PrepareToSkipAGap;
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}
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AllDone:
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// Update our state variables so that the next line can continue
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// where we left off:
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pls->spRemaining = cStyle;
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pls->ulStyleMask = bIsGap;
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pstrip->ptlStart.x = x;
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pstrip->ptlStart.y = y;
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}
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/******************************Public*Routine******************************\
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* VOID vIoStyledVertical
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*
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* Takes the list of strips that define the pixels that would be lit for
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* a solid line, and breaks them into styling chunks according to the
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* styling information that is passed in.
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*
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* This particular routine handles y-major lines that run left-to-right,
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* and are comprised of vertical strips. It draws the dashes using
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* short-stroke vectors.
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*
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* The performance of this routine could be improved significantly if
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* anyone cared enough about styled lines improve it.
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*
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\**************************************************************************/
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VOID vIoStyledVertical(
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PDEV* ppdev,
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STRIP* pstrip,
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LINESTATE* pls)
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{
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BYTE* pjPorts = ppdev->pjPorts;
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LONG cBpp = ppdev->cBpp;
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LONG lDelta = ppdev->lDelta;
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LONG x = pstrip->ptlStart.x; // x position of start of first strip
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LONG y = pstrip->ptlStart.y; // y position of start of first strip
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LONG xy = PELS_TO_BYTES(x) + (lDelta * y);
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LONG* plStrip = pstrip->alStrips; // Points to current strip
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LONG cStrips = pstrip->cStrips; // Total number of strips we'll do
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LONG dy;
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LONG dylDelta;
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LONG cStyle;
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LONG cStrip;
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LONG cThis;
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ULONG bIsGap;
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if (pstrip->flFlips & FL_FLIP_V)
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{
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// The minor direction of the line is 0 degrees, and the major
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// direction is 90 (it's a left-to-right y-major line going up):
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dy = -1;
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dylDelta = -lDelta;
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}
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else
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{
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// The minor direction of the line is 0 degrees, and the major
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// direction is 270 (it's a left-to-right y-major line going down):
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dy = 1;
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dylDelta = lDelta;
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}
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cStrip = *plStrip; // Number of pels in first strip
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cStyle = pls->spRemaining; // Number of pels in first 'gap' or 'dash'
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bIsGap = pls->ulStyleMask; // Tells whether in a 'gap' or a 'dash'
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// ulStyleMask is non-zero if we're in the middle of a 'gap',
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// and zero if we're in the middle of a 'dash':
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if (bIsGap)
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goto SkipAGap;
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else
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goto OutputADash;
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PrepareToSkipAGap:
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// Advance in the style-state array, so that we can find the next
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// 'dot' that we'll have to display:
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bIsGap = ~bIsGap;
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pls->psp++;
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if (pls->psp > pls->pspEnd)
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pls->psp = pls->pspStart;
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cStyle = *pls->psp;
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// If 'cStrip' is zero, we also need a new strip:
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if (cStrip != 0)
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goto SkipAGap;
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// Here, we're in the middle of a 'gap' where we don't have to
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// display anything. We simply cycle through all the strips
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// we can, keeping track of the current position, until we run
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// out of 'gap':
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while (TRUE)
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{
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// Each time we loop, we move to a new column and need a new strip:
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xy += cBpp;
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x++;
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plStrip++;
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cStrips--;
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if (cStrips == 0)
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goto AllDone;
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cStrip = *plStrip;
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SkipAGap:
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cThis = min(cStrip, cStyle);
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cStyle -= cThis;
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cStrip -= cThis;
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if (dy > 0)
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{
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y += cThis;
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xy += (cThis * lDelta);
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}
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else
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{
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y -= cThis;
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xy -= (cThis * lDelta);
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}
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if (cStyle == 0)
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goto PrepareToOutputADash;
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}
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PrepareToOutputADash:
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// Advance in the style-state array, so that we can find the next
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// 'dot' that we'll have to display:
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bIsGap = ~bIsGap;
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pls->psp++;
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if (pls->psp > pls->pspEnd)
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pls->psp = pls->pspStart;
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cStyle = *pls->psp;
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// If 'cStrip' is zero, we also need a new strip.
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if (cStrip != 0)
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{
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// There's more to be done in the current strip:
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goto OutputADash;
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}
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// We've finished with the current strip:
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while (TRUE)
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{
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// Each time we loop, we move to a new column and need a new strip:
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xy += cBpp;
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x++;
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plStrip++;
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cStrips--;
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if (cStrips == 0)
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goto AllDone;
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cStrip = *plStrip;
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OutputADash:
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cThis = min(cStrip, cStyle);
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cStyle -= cThis;
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cStrip -= cThis;
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if (dy <= 0)
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{
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IO_DRAW_VERT_STRIP_FLIPPED(xy, cThis, lDelta, cBpp);
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y -= cThis; // y-
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xy -= (cThis * lDelta); // y-
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}
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else
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{
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IO_DRAW_VERT_STRIP(xy, cThis, lDelta, cBpp);
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y += cThis; // y+
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xy += (cThis * lDelta); // y+
|
|
}
|
|
|
|
|
|
if (cStyle == 0)
|
|
goto PrepareToSkipAGap;
|
|
}
|
|
|
|
AllDone:
|
|
|
|
// Update our state variables so that the next line can continue
|
|
// where we left off:
|
|
|
|
pls->spRemaining = cStyle;
|
|
pls->ulStyleMask = bIsGap;
|
|
pstrip->ptlStart.x = x;
|
|
pstrip->ptlStart.y = y;
|
|
}
|
|
|