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514 lines
13 KiB
514 lines
13 KiB
/******************************Module*Header*******************************\
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* Module Name: Strips.c
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*
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* All the line code in this driver amounts to a big bag of dirt. Someday,
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* I'm going to rewrite it all. Not today, though (sigh)...
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*
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* Copyright (c) 1992-1995 Microsoft Corporation
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*
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* $Workfile: STRIPS.C $
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*
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* $Log: X:/log/laguna/nt35/displays/cl546x/STRIPS.C $
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*
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* Rev 1.4 Mar 04 1998 15:35:14 frido
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* Added new shadow macros.
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*
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* Rev 1.3 Nov 03 1997 10:50:06 frido
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* Added REQUIRE macros.
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*
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* Rev 1.2 20 Aug 1996 11:04:28 noelv
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* Bugfix release from Frido 8-19-96
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*
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* Rev 1.0 14 Aug 1996 17:16:32 frido
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* Initial revision.
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*
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* Rev 1.1 28 Mar 1996 08:58:40 noelv
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* Frido bug fix release 22
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*
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* Rev 1.1 27 Mar 1996 13:57:28 frido
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* Fixed line drawing.
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*
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\**************************************************************************/
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#include "precomp.h"
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#define STARTBLT()
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/******************************Public*Routine******************************\
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* VOID vrlSolidHorizontal
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*
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* Draws left-to-right x-major near-horizontal lines using radial lines.
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*
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\**************************************************************************/
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VOID vrlSolidHorizontal(
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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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LONG cStrips;
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LONG i, yDir, x, y;
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PLONG pStrips;
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LONG xPels;
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cStrips = pStrip->cStrips;
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pStrips = pStrip->alStrips;
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// Get the starting coordinates and adjust for device bitmaps.
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x = pStrip->ptlStart.x + ppdev->ptlOffset.x;
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y = pStrip->ptlStart.y + ppdev->ptlOffset.y;
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// Determine y-direction.
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if (pStrip->flFlips & FL_FLIP_V)
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{
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yDir = -1;
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ppdev->uBLTDEF |= BD_YDIR;
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}
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else
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{
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yDir = 1;
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ppdev->uBLTDEF &= ~BD_YDIR;
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}
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// Start the BitBlt.
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STARTBLT();
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// Here is where we will setup DrawDef and BlitDef
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REQUIRE(2);
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LL_DRAWBLTDEF((ppdev->uBLTDEF << 16) | ppdev->uRop, 2);
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// Loop through all the strips.
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for (i = 0; i < cStrips; i++)
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{
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// Get the width of this stripe.
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xPels = *pStrips++;
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// Draw it.
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REQUIRE(5);
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LL_OP0(x, y);
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LL_BLTEXT(xPels, 1);
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// Advance to next strip.
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x += xPels;
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y += yDir;
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}
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// Store the current coordinates back.
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pStrip->ptlStart.x = x - ppdev->ptlOffset.x;
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pStrip->ptlStart.y = y - ppdev->ptlOffset.y;
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}
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/******************************Public*Routine******************************\
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* VOID vrlSolidVertical
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*
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* Draws left-to-right y-major near-vertical lines using radial lines.
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*
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\**************************************************************************/
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VOID vrlSolidVertical(
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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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LONG cStrips;
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LONG i, x, y, yDir;
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PLONG pStrips;
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LONG yPels;
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cStrips = pStrip->cStrips;
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pStrips = pStrip->alStrips;
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// Get the starting coordinates and adjust for device bitmaps.
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x = pStrip->ptlStart.x + ppdev->ptlOffset.x;
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y = pStrip->ptlStart.y + ppdev->ptlOffset.y;
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// Determine y-direction.
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if (pStrip->flFlips & FL_FLIP_V)
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{
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ppdev->uBLTDEF |= BD_YDIR;
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yDir = -1;
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}
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else
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{
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yDir = 1;
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ppdev->uBLTDEF &= ~BD_YDIR;
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}
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// Start the BitBlt.
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STARTBLT();
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// Here is where we will setup DrawDef and BlitDef
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REQUIRE(2);
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LL_DRAWBLTDEF((ppdev->uBLTDEF << 16) | ppdev->uRop, 2);
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// Loop through all the strips.
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for (i = 0; i < cStrips; i++)
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{
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// Get the height of this stripe.
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yPels = *pStrips++;
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// Draw it.
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REQUIRE(5);
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LL_OP0(x, y);
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LL_BLTEXT(1, yPels);
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// Advance to next strip.
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x++;
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y += yDir * yPels;
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}
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// Store the current coordinates back.
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pStrip->ptlStart.x = x - ppdev->ptlOffset.x;
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pStrip->ptlStart.y = y - ppdev->ptlOffset.y;
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}
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/******************************Public*Routine******************************\
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* VOID vStripStyledHorizontal
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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 vStripStyledHorizontal(
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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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LONG x, y, dy;
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PLONG plStrip;
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LONG cStrips;
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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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// Determine y-direction.
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if (pstrip->flFlips & FL_FLIP_V)
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{
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dy = -1;
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ppdev->uBLTDEF |= BD_YDIR;
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}
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else
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{
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ppdev->uBLTDEF &= ~BD_YDIR;
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dy = 1;
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}
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cStrips = pstrip->cStrips; // Total number of strips we'll do
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plStrip = pstrip->alStrips; // Points to current strip
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// Get the starting coordinates and adjust for device bitmaps.
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x = pstrip->ptlStart.x + ppdev->ptlOffset.x;
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y = pstrip->ptlStart.y + ppdev->ptlOffset.y;
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// Start the BitBlt.
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STARTBLT();
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// Here is where we will setup DrawDef and BlitDef.
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REQUIRE(2);
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LL_DRAWBLTDEF((ppdev->uBLTDEF << 16) | ppdev->uRop, 2);
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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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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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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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goto OutputADash;
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}
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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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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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// Draw the stripe.
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REQUIRE(5);
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LL_OP0(x, y);
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LL_BLTEXT(cThis, 1);
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x += cThis;
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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 - ppdev->ptlOffset.x;
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pstrip->ptlStart.y = y - ppdev->ptlOffset.y;
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}
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/******************************Public*Routine******************************\
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* VOID vStripStyledVertical
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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 vStripStyledVertical(
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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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LONG x, y, dy;
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PLONG plStrip;
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LONG cStrips;
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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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// Determine the y-direction.
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if (pstrip->flFlips & FL_FLIP_V)
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{
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dy = -1;
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ppdev->uBLTDEF |= BD_YDIR;
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}
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else
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{
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dy = 1;
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ppdev->uBLTDEF &= ~BD_YDIR;
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}
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cStrips = pstrip->cStrips; // Total number of strips we'll do
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plStrip = pstrip->alStrips; // Points to current strip
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// Get the starting coordinates and adjust for device bitmaps.
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x = pstrip->ptlStart.x + ppdev->ptlOffset.x;
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y = pstrip->ptlStart.y + ppdev->ptlOffset.y;
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// Start the BitBlt.
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STARTBLT();
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// Here is where we will setup DrawDef and BlitDef.
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REQUIRE(2);
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LL_DRAWBLTDEF((ppdev->uBLTDEF << 16) | ppdev->uRop, 2);
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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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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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y += (dy > 0) ? cThis : -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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goto OutputADash;
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}
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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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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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// Draw the stripe.
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REQUIRE(5);
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LL_OP0(x, y);
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LL_BLTEXT(1, cThis);
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y += dy * cThis;
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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 - ppdev->ptlOffset.x;
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pstrip->ptlStart.y = y - ppdev->ptlOffset.y;
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}
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