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CG16bitRegion.cpp
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// CG16bitRegion.cpp
//
// CG16bitRegion class
// Copyright (c) 2013 by Kronosaur Productions, LLC. All Rights Reserved.
#include <windows.h>
#include "Alchemy.h"
#include "DirectXUtil.h"
const DWORD ALLOC_GRANULARITY = 4096;
CG16bitRegion::CG16bitRegion (void) :
m_cxWidth(0),
m_cyHeight(0),
m_dwAlloc(0),
m_pCode(NULL)
// CG16bitRegion constructor
{
}
void CG16bitRegion::AllocCode (DWORD dwNewAlloc)
// AllocCode
//
// Allocate code.
{
if (dwNewAlloc > m_dwAlloc)
{
WORD *pNewCode = new WORD [dwNewAlloc];
// Copy old code
if (m_pCode)
{
WORD *pSrc = m_pCode;
WORD *pSrcEnd = m_pCode + m_dwAlloc;
WORD *pDest = pNewCode;
while (pSrc < pSrcEnd)
*pDest++ = *pSrc++;
}
// Swap
if (m_pCode)
delete [] m_pCode;
m_pCode = pNewCode;
m_dwAlloc = dwNewAlloc;
}
}
void CG16bitRegion::Blt (CG32bitImage &Dest, int xDest, int yDest, CG32bitImage &Src, int xSrc, int ySrc, int cxWidth, int cyHeight)
// Blt
//
// Blt an image through this region.
{
int xSrcOriginal = xSrc;
int ySrcOriginal = ySrc;
// Make sure we're in bounds
if (!Dest.AdjustCoords(&xSrc, &ySrc, Src.GetWidth(), Src.GetHeight(),
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
int xMask = (xSrc - xSrcOriginal);
int yMask = (ySrc - ySrcOriginal);
// Blt each line
CG32bitPixel *pDstRow = Dest.GetPixelPos(xDest, yDest);
CG32bitPixel *pSrcRow = Src.GetPixelPos(xSrc, ySrc);
int iLine;
int iLineEnd = yMask + cyHeight;
for (iLine = yMask; iLine < iLineEnd; iLine++)
{
WORD *pCode = m_pCode + m_LineIndex[iLine];
int cxOffset = xMask;
int cxBlt = cxWidth;
while (cxBlt > 0)
{
switch ((*pCode) & codeMask)
{
case code00:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Skip any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
cxBlt -= cxConsume;
}
break;
}
case codeRun:
{
int cxCount = ((*pCode) & countMask);
int cxOriginalCount = cxCount;
pCode++;
BYTE *pRun = (BYTE *)pCode;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
pRun += cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
CG32bitPixel *pSrc = pSrcRow + (cxWidth - cxBlt);
CG32bitPixel *pSrcEnd = pSrc + cxConsume;
CG32bitPixel *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
BYTE bySrcAlpha = pSrc->GetAlpha();
if (bySrcAlpha == 0x00)
;
else if (bySrcAlpha == 0xff)
*pDest = CG32bitPixel::Blend(*pDest, *pSrc, *pRun);
else
{
CG32bitPixel rgbSrcPM = CG32bitPixel::Blend(0, *pSrc, *pRun);
BYTE byFinalAlpha = CG32bitPixel::BlendAlpha(bySrcAlpha, *pRun);
if (byFinalAlpha > 0)
{
BYTE *pAlphaInv = CG32bitPixel::AlphaTable(byFinalAlpha ^ 0xff); // Equivalent to 255 - byAlpha
BYTE byRedResult = (BYTE)Min((WORD)0xff, (WORD)(pAlphaInv[pDest->GetRed()] + (WORD)rgbSrcPM.GetRed()));
BYTE byGreenResult = (BYTE)Min((WORD)0xff, (WORD)(pAlphaInv[pDest->GetGreen()] + (WORD)rgbSrcPM.GetGreen()));
BYTE byBlueResult = (BYTE)Min((WORD)0xff, (WORD)(pAlphaInv[pDest->GetBlue()] + (WORD)rgbSrcPM.GetBlue()));
*pDest = CG32bitPixel(byRedResult, byGreenResult, byBlueResult);
}
}
pDest++;
pSrc++;
pRun++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
pCode += AlignUp(cxOriginalCount, sizeof(WORD)) / 2;
break;
}
case codeFF:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
CG32bitPixel *pSrc = pSrcRow + (cxWidth - cxBlt);
CG32bitPixel *pSrcEnd = pSrc + cxConsume;
CG32bitPixel *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
BYTE bySrcAlpha = pSrc->GetAlpha();
if (bySrcAlpha == 0x00)
;
else if (bySrcAlpha == 0xff)
*pDest = *pSrc;
else
{
BYTE *pAlphaInv = CG32bitPixel::AlphaTable(bySrcAlpha ^ 0xff); // Equivalent to 255 - byAlpha
BYTE byRedResult = (BYTE)Min((WORD)0xff, (WORD)(pAlphaInv[pDest->GetRed()] + (WORD)pSrc->GetRed()));
BYTE byGreenResult = (BYTE)Min((WORD)0xff, (WORD)(pAlphaInv[pDest->GetGreen()] + (WORD)pSrc->GetGreen()));
BYTE byBlueResult = (BYTE)Min((WORD)0xff, (WORD)(pAlphaInv[pDest->GetBlue()] + (WORD)pSrc->GetBlue()));
*pDest = CG32bitPixel(byRedResult, byGreenResult, byBlueResult);
}
pDest++;
pSrc++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
break;
}
case codeEndOfLine:
{
cxBlt = 0;
break;
}
default:
ASSERT(false);
}
}
// Next row
pSrcRow = Src.NextRow(pSrcRow);
pDstRow = Dest.NextRow(pDstRow);
}
}
void CG16bitRegion::CleanUp (void)
// CleanUp
//
// Clean up the region
{
if (m_pCode)
{
delete [] m_pCode;
m_pCode = NULL;
m_dwAlloc = 0;
}
m_LineIndex.DeleteAll();
m_cxWidth = 0;
m_cyHeight = 0;
}
void CG16bitRegion::ColorTransBlt (CG16bitImage &Dest, int xDest, int yDest, CG16bitImage &Src, int xSrc, int ySrc, int cxWidth, int cyHeight)
// ColorTransBlt
//
// Paints
{
int xSrcOriginal = xSrc;
int ySrcOriginal = ySrc;
// Make sure we're in bounds
if (!Dest.AdjustCoords(&xSrc, &ySrc, Src.GetWidth(), Src.GetHeight(),
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
int xMask = (xSrc - xSrcOriginal);
int yMask = (ySrc - ySrcOriginal);
// Blt based on source image
if (Src.HasAlpha())
ColorTransBltAlpha(Dest, xDest, yDest, Src, xSrc, ySrc, cxWidth, cyHeight, xMask, yMask);
else if (Src.IsTransparent())
ColorTransBltBackColor(Dest, xDest, yDest, Src, xSrc, ySrc, cxWidth, cyHeight, xMask, yMask);
else
ColorTransBltPlain(Dest, xDest, yDest, Src, xSrc, ySrc, cxWidth, cyHeight, xMask, yMask);
}
void CG16bitRegion::ColorTransBltAlpha (CG16bitImage &Dest, int xDest, int yDest, CG16bitImage &Src, int xSrc, int ySrc, int cxWidth, int cyHeight, int xMask, int yMask)
// ColorTransBltAlpha
//
// Paints
{
// Blt each line
WORD *pDstRow = Dest.GetPixel(Dest.GetRowStart(yDest), xDest);
WORD *pSrcRow = Src.GetPixel(Src.GetRowStart(ySrc), xSrc);
BYTE *pSrcAlphaRow = Src.GetAlphaRow(ySrc) + xSrc;
int iLine;
int iLineEnd = yMask + cyHeight;
for (iLine = yMask; iLine < iLineEnd; iLine++)
{
WORD *pCode = m_pCode + m_LineIndex[iLine];
int cxOffset = xMask;
int cxBlt = cxWidth;
while (cxBlt > 0)
{
switch ((*pCode) & codeMask)
{
case code00:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Skip any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
cxBlt -= cxConsume;
}
break;
}
case codeRun:
{
int cxCount = ((*pCode) & countMask);
int cxOriginalCount = cxCount;
pCode++;
BYTE *pRun = (BYTE *)pCode;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
pRun += cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
WORD *pSrc = pSrcRow + (cxWidth - cxBlt);
WORD *pSrcEnd = pSrc + cxConsume;
BYTE *pSrcAlpha = pSrcAlphaRow + (cxWidth - cxBlt);
WORD *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
if (*pSrcAlpha == 0)
;
else if (*pSrcAlpha == 0xFF)
*pDest = CG16bitImage::BlendPixel(*pDest, *pSrc, *pRun);
else
{
WORD wSrcPM = CG16bitImage::BlendPixel(0, *pSrc, *pRun);
DWORD dwTrans = (DWORD)(*pSrcAlpha) * (DWORD)(*pRun) / 0xFF;
if (dwTrans > 0)
*pDest = CG16bitImage::BlendPixelPM(*pDest, wSrcPM, (BYTE)(dwTrans));
}
pDest++;
pSrc++;
pSrcAlpha++;
pRun++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
pCode += AlignUp(cxOriginalCount, sizeof(WORD)) / 2;
break;
}
case codeFF:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
WORD *pSrc = pSrcRow + (cxWidth - cxBlt);
WORD *pSrcEnd = pSrc + cxConsume;
BYTE *pSrcAlpha = pSrcAlphaRow + (cxWidth - cxBlt);
WORD *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
if (*pSrcAlpha == 0x00)
;
else if (*pSrcAlpha == 0xFF)
*pDest = *pSrc;
else
*pDest = CG16bitImage::BlendPixelPM(*pDest, *pSrc, *pSrcAlpha);
pDest++;
pSrc++;
pSrcAlpha++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
break;
}
case codeEndOfLine:
{
cxBlt = 0;
break;
}
default:
ASSERT(false);
}
}
// Next row
pSrcRow = Src.NextRow(pSrcRow);
pDstRow = Dest.NextRow(pDstRow);
pSrcAlphaRow = Src.NextAlphaRow(pSrcAlphaRow);
}
}
void CG16bitRegion::ColorTransBltBackColor (CG16bitImage &Dest, int xDest, int yDest, CG16bitImage &Src, int xSrc, int ySrc, int cxWidth, int cyHeight, int xMask, int yMask)
// ColorTransBltBackColor
//
// Paints
{
// Blt each line
WORD wBackColor = Src.GetBackColor();
WORD *pDstRow = Dest.GetPixel(Dest.GetRowStart(yDest), xDest);
WORD *pSrcRow = Src.GetPixel(Src.GetRowStart(ySrc), xSrc);
int iLine;
int iLineEnd = yMask + cyHeight;
for (iLine = yMask; iLine < iLineEnd; iLine++)
{
WORD *pCode = m_pCode + m_LineIndex[iLine];
int cxOffset = xMask;
int cxBlt = cxWidth;
while (cxBlt > 0)
{
switch ((*pCode) & codeMask)
{
case code00:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Skip any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
cxBlt -= cxConsume;
}
break;
}
case codeRun:
{
int cxCount = ((*pCode) & countMask);
int cxOriginalCount = cxCount;
pCode++;
BYTE *pRun = (BYTE *)pCode;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
pRun += cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
WORD *pSrc = pSrcRow + (cxWidth - cxBlt);
WORD *pSrcEnd = pSrc + cxConsume;
WORD *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
if (*pSrc != wBackColor)
*pDest = CG16bitImage::BlendPixel(*pDest, *pSrc, *pRun);
pDest++;
pSrc++;
pRun++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
pCode += AlignUp(cxOriginalCount, sizeof(WORD)) / 2;
break;
}
case codeFF:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
WORD *pSrc = pSrcRow + (cxWidth - cxBlt);
WORD *pSrcEnd = pSrc + cxConsume;
WORD *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
if (*pSrc != wBackColor)
*pDest = *pSrc;
pDest++;
pSrc++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
break;
}
case codeEndOfLine:
{
cxBlt = 0;
break;
}
default:
ASSERT(false);
}
}
// Next row
pSrcRow = Src.NextRow(pSrcRow);
pDstRow = Dest.NextRow(pDstRow);
}
}
void CG16bitRegion::ColorTransBltPlain (CG16bitImage &Dest, int xDest, int yDest, CG16bitImage &Src, int xSrc, int ySrc, int cxWidth, int cyHeight, int xMask, int yMask)
// ColorTransBltPlain
//
// Paints
{
// Blt each line
WORD *pDstRow = Dest.GetPixel(Dest.GetRowStart(yDest), xDest);
WORD *pSrcRow = Src.GetPixel(Src.GetRowStart(ySrc), xSrc);
int iLine;
int iLineEnd = yMask + cyHeight;
for (iLine = yMask; iLine < iLineEnd; iLine++)
{
WORD *pCode = m_pCode + m_LineIndex[iLine];
int cxOffset = xMask;
int cxBlt = cxWidth;
while (cxBlt > 0)
{
switch ((*pCode) & codeMask)
{
case code00:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Skip any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
cxBlt -= cxConsume;
}
break;
}
case codeRun:
{
int cxCount = ((*pCode) & countMask);
int cxOriginalCount = cxCount;
pCode++;
BYTE *pRun = (BYTE *)pCode;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
pRun += cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
WORD *pSrc = pSrcRow + (cxWidth - cxBlt);
WORD *pSrcEnd = pSrc + cxConsume;
WORD *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
{
*pDest = CG16bitImage::BlendPixel(*pDest, *pSrc, *pRun);
pDest++;
pSrc++;
pRun++;
}
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
pCode += AlignUp(cxOriginalCount, sizeof(WORD)) / 2;
break;
}
case codeFF:
{
int cxCount = ((*pCode) & countMask);
pCode++;
// Deal with offset
if (cxOffset)
{
int cxConsume = Min(cxCount, cxOffset);
cxCount -= cxConsume;
cxOffset -= cxConsume;
}
ASSERT(cxCount == 0 || cxOffset == 0);
// Blt any remaining
if (cxCount > 0)
{
int cxConsume = Min(cxCount, cxBlt);
WORD *pSrc = pSrcRow + (cxWidth - cxBlt);
WORD *pSrcEnd = pSrc + cxConsume;
WORD *pDest = pDstRow + (cxWidth - cxBlt);
while (pSrc < pSrcEnd)
*pDest++ = *pSrc++;
cxBlt -= cxConsume;
ASSERT(cxBlt == 0 || cxConsume == cxCount);
}
break;
}
case codeEndOfLine:
{
cxBlt = 0;
break;
}
default:
ASSERT(false);
}
}
// Next row
pSrcRow = Src.NextRow(pSrcRow);
pDstRow = Dest.NextRow(pDstRow);
}
}
bool CG16bitRegion::CreateFromMask (const CG8bitImage &Source, int xSrc, int ySrc, int cxWidth, int cyHeight)
// CreateFromMask
//
// Creates a region from an 8-bit image
{
int i;
enum EStates
{
stateStart,
state00,
stateRun,
stateFF,
};
CleanUp();
// Make sure we're in bounds
if (!Source.AdjustCoords(NULL, NULL, 0, 0,
&xSrc, &ySrc,
&cxWidth, &cyHeight))
return true;
// Null case
if (Source.IsEmpty() || cxWidth == 0 || cyHeight == 0)
return true;
// Get the mask size
m_cxWidth = cxWidth;
m_cyHeight = cyHeight;
// Allocate destination
DWORD dwCodeSize = 0;
AllocCode(ALLOC_GRANULARITY);
WORD *pCode = m_pCode;
m_LineIndex.InsertEmpty(m_cyHeight);
// Loop over all lines
for (i = 0; i < m_cyHeight; i++)
{
EStates iState = stateStart;
DWORD dwCount;
BYTE *pRun;
// Remember the offset into the given line
m_LineIndex[i] = dwCodeSize;
// Loop
BYTE *pSrc = Source.GetPixelPos(xSrc, ySrc + i);
BYTE *pSrcEnd = pSrc + m_cxWidth;
while (pSrc < pSrcEnd)
{
switch (iState)
{
case stateStart:
if (*pSrc == 0x00)
{
dwCount = 1;
iState = state00;
}
else if (*pSrc == 0xFF)
{
dwCount = 1;
iState = stateFF;
}
else
{
pRun = pSrc;
iState = stateRun;
}
break;
case state00:
if (*pSrc == 0x00)
dwCount++;
else if (*pSrc == 0xFF)
{
WriteCode(pCode, dwCodeSize, code00, dwCount);
dwCount = 1;
iState = stateFF;
}
else
{
WriteCode(pCode, dwCodeSize, code00, dwCount);
pRun = pSrc;
iState = stateRun;
}
break;
case stateRun:
if (*pSrc == 0x00)
{
WriteCodeRun(pCode, dwCodeSize, pRun, (DWORD)(pSrc - pRun));
dwCount = 1;
iState = state00;
}
else if (*pSrc == 0xFF)
{
WriteCodeRun(pCode, dwCodeSize, pRun, (DWORD)(pSrc - pRun));
dwCount = 1;
iState = stateFF;
}
break;
case stateFF:
if (*pSrc == 0x00)
{
WriteCode(pCode, dwCodeSize, codeFF, dwCount);
dwCount = 1;
iState = state00;
}
else if (*pSrc == 0xFF)
dwCount++;
else
{
WriteCode(pCode, dwCodeSize, codeFF, dwCount);
pRun = pSrc;
iState = stateRun;
}
break;
}
pSrc++;
}
// Done with line
switch (iState)
{
case state00:
WriteCode(pCode, dwCodeSize, code00, dwCount);
break;
case stateRun:
WriteCodeRun(pCode, dwCodeSize, pRun, (DWORD)(pSrc - pRun));
break;
case stateFF:
WriteCode(pCode, dwCodeSize, codeFF, dwCount);
break;
}
WriteCode(pCode, dwCodeSize, codeEndOfLine, 0);
}
return true;
}
bool CG16bitRegion::CreateFromMask (const CG16bitImage &Source, int xSrc, int ySrc, int cxWidth, int cyHeight)
// CreateFromMask
//
// Creates a region from an alpha mask.
{
int i;
enum EStates
{
stateStart,
state00,
stateRun,
stateFF,
};
CleanUp();
// Make sure we're in bounds
if (!Source.AdjustCoords(NULL, NULL, 0, 0,
&xSrc, &ySrc,
&cxWidth, &cyHeight))
return true;
// Null case
if (!Source.HasAlpha() || cxWidth == 0 || cyHeight == 0)
return true;
// Get the mask size
m_cxWidth = cxWidth;
m_cyHeight = cyHeight;
// Allocate destination
DWORD dwCodeSize = 0;
AllocCode(ALLOC_GRANULARITY);
WORD *pCode = m_pCode;
m_LineIndex.InsertEmpty(m_cyHeight);
// Loop over all lines
for (i = 0; i < m_cyHeight; i++)
{