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CG16BitImage.cpp
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// CG16bitImage.cpp
//
// Implementation of raw 16-bit image object
#include <windows.h>
#include "Alchemy.h"
#include "JPEGUtil.h"
#include "DirectXUtil.h"
//#define DEBUG_TIME
const int IMAGE_SAVE_VERSION = 1;
const int RGB_COMPRESSION_NONE = 0;
const int ALPHA_COMPRESSION_NONE = 0;
int g_iTemp;
#define IntMult(wColor, wScale) (g_iTemp = (DWORD)(wColor) * (DWORD)(wScale) + 0x80, (DWORD)(((g_iTemp >> 8) + g_iTemp) >> 8))
bool InitBlendPixelTables (void);
AlphaArray5 g_Alpha5 [256];
AlphaArray6 g_Alpha6 [256];
bool g_bInit = InitBlendPixelTables();
CG16bitImage::CG16bitImage (void) :
m_pRGB(NULL),
m_pAlpha(NULL),
m_wBackColor(0),
m_bHasMask(false),
m_pRedAlphaTable(NULL),
m_pGreenAlphaTable(NULL),
m_pBlueAlphaTable(NULL),
m_pSurface(NULL),
m_pSprite(NULL),
m_pBMI(NULL)
// CG16bitImage constructor
{
}
CG16bitImage::CG16bitImage (const CG16bitImage &Src)
// CG16bitImage copy constructor
{
CopyData(Src);
}
CG16bitImage::~CG16bitImage (void)
// CG16bitImage destructor
{
DeleteData();
}
CG16bitImage &CG16bitImage::operator= (const CG16bitImage &Src)
// CG16bitImage operator =
{
DeleteData();
CopyData(Src);
return *this;
}
int CG16bitImage::AdjustTextX (const CG16bitFont &Font, const CString &sText, AlignmentStyles iAlign, int x)
// AdjustTextX
//
// Adjusts the x coordinate to paint the text at, accounting for:
//
// 1. alignment, offsetting if necessary
// 2. clipping, offsetting to fit in clip region.
{
int cxText = Font.MeasureText(sText);
if (iAlign & alignCenter)
x -= (cxText / 2);
else if (iAlign & alignRight)
x -= cxText;
return Min(Max((int)m_rcClip.left, x), (int)m_rcClip.right - cxText);
}
void CG16bitImage::AssociateSurface (LPDIRECTDRAW7 pDD)
// AssociateSurface
//
// Creates a surface for this image
{
if (m_pSurface == NULL)
{
DDSURFACEDESC2 ddsd2;
::ZeroMemory(&ddsd2, sizeof(DDSURFACEDESC2));
::ZeroMemory(&ddsd2.ddpfPixelFormat, sizeof(DDPIXELFORMAT));
ddsd2.dwSize = sizeof(ddsd2);
ddsd2.dwFlags = DDSD_WIDTH | DDSD_HEIGHT | DDSD_LPSURFACE |
DDSD_PITCH | DDSD_PIXELFORMAT | DDSD_CAPS;
ddsd2.dwWidth = m_cxWidth;
ddsd2.dwHeight= m_cyHeight;
ddsd2.lPitch = AlignUp(m_cxWidth * 2, sizeof(DWORD));
ddsd2.lpSurface = m_pRGB;
// Set up the pixel format for 16-bit RGB (5-6-5).
ddsd2.ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);
ddsd2.ddpfPixelFormat.dwFlags= DDPF_RGB;
ddsd2.ddpfPixelFormat.dwRGBBitCount = 16;
ddsd2.ddpfPixelFormat.dwRBitMask = 0xf800;
ddsd2.ddpfPixelFormat.dwGBitMask = 0x07e0;
ddsd2.ddpfPixelFormat.dwBBitMask = 0x001f;
ddsd2.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY;
// Create the surface
HRESULT hr = pDD->CreateSurface(&ddsd2, &m_pSurface, NULL);
if (FAILED(hr))
kernelDebugLogPattern("Unable to associate surface: %x", hr);
}
}
WORD CG16bitImage::BlendPixel (WORD pxDest, WORD pxSource, DWORD byOpacity)
// BlendPixel
//
// Blends the dest and the source according to byTrans
{
#ifndef OLD_BLEND
DWORD dTemp = pxDest;
DWORD sTemp = pxSource;
BYTE *pAlpha5 = g_Alpha5[byOpacity];
BYTE *pAlpha6 = g_Alpha6[byOpacity];
BYTE *pAlpha5Inv = g_Alpha5[255 - byOpacity];
BYTE *pAlpha6Inv = g_Alpha6[255 - byOpacity];
DWORD dwRedResult = pAlpha5Inv[(dTemp & 0xf800) >> 11] + pAlpha5[(sTemp & 0xf800) >> 11];
DWORD dwGreenResult = pAlpha6Inv[(dTemp & 0x7e0) >> 5] + pAlpha6[(sTemp & 0x7e0) >> 5];
DWORD dwBlueResult = pAlpha5Inv[(dTemp & 0x1f)] + pAlpha5[(sTemp & 0x1f)];
return (WORD)((dwRedResult << 11) | (dwGreenResult << 5) | (dwBlueResult));
#else
DWORD sTemp = pxSource;
DWORD dTemp = pxDest;
DWORD sb = sTemp & 0x1f;
DWORD db = dTemp & 0x1f;
DWORD sg = (sTemp >> 5) & 0x3f;
DWORD dg = (dTemp >> 5) & 0x3f;
DWORD sr = (sTemp >> 11) & 0x1f;
DWORD dr = (dTemp >> 11) & 0x1f;
return (WORD)((byOpacity * (sb - db) >> 8) + db |
((byOpacity * (sg - dg) >> 8) + dg) << 5 |
((byOpacity * (sr - dr) >> 8) + dr) << 11);
#endif
}
WORD CG16bitImage::BlendPixelGray (WORD pxDest, WORD pxSource, DWORD byOpacity)
// BlendPixelGray
//
// Blends the dest and the source according to byOpacity. Uses only 5-bits of data for the
// green channel to preserve the relative weight of all channels. [Without this, sometimes
// gray colors turn green or purple, because of uneven round-off.]
{
DWORD dTemp = pxDest;
DWORD sTemp = pxSource;
BYTE *pAlpha5 = g_Alpha5[byOpacity];
BYTE *pAlpha5Inv = g_Alpha5[255 - byOpacity];
DWORD dwRedResult = pAlpha5Inv[(dTemp & 0xf800) >> 11] + pAlpha5[(sTemp & 0xf800) >> 11];
DWORD dwGreenResult = pAlpha5Inv[(dTemp & 0x7e0) >> 6] + pAlpha5[(sTemp & 0x7e0) >> 6];
DWORD dwBlueResult = pAlpha5Inv[(dTemp & 0x1f)] + pAlpha5[(sTemp & 0x1f)];
return (WORD)((dwRedResult << 11) | (dwGreenResult << 6) | (dwBlueResult));
}
WORD CG16bitImage::BlendPixelPM (DWORD pxDest, DWORD pxSource, DWORD byOpacity)
// BlendPixelPM
//
// Blends the dest and the source according to byTrans assuming that the
// source and destination use pre-multiplied values
{
DWORD dwInvTrans = (byOpacity ^ 0xff);
DWORD dwRedGreenS = ((pxSource << 8) & 0x00f80000) | (pxSource & 0x000007e0);
DWORD dwRedGreen = (((((pxDest << 8) & 0x00f80000) | (pxDest & 0x000007e0)) * dwInvTrans) >> 8) + dwRedGreenS;
DWORD dwBlue = (((pxDest & 0x1f) * dwInvTrans) >> 8) + (pxSource & 0x1f);
return (WORD)(((dwRedGreen & 0x00f80000) >> 8) | (dwRedGreen & 0x000007e0) | dwBlue);
}
void CG16bitImage::Blt (int xSrc, int ySrc, int cxWidth, int cyHeight, const CG16bitImage &Source, int xDest, int yDest)
// Blt
//
// Blt the image to the destination
{
// Make sure we're in bounds
if (!AdjustCoords(&xSrc, &ySrc, Source.m_cxWidth, Source.m_cyHeight,
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
// Do the blt
WORD *pSrcRow = Source.GetPixel(Source.GetRowStart(ySrc), xSrc);
WORD *pSrcRowEnd = Source.GetPixel(Source.GetRowStart(ySrc + cyHeight), xSrc);
WORD *pDestRow = GetPixel(GetRowStart(yDest), xDest);
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
*pDestPos++ = *pSrcPos++;
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
}
}
void CG16bitImage::BltGray (int xSrc, int ySrc, int cxWidth, int cyHeight, int iAlpha, const CG16bitImage &Source, int xDest, int yDest)
// Blt
//
// Blt the image to the destination
{
// Deal with sprite sources
if (Source.m_pSprite)
{
Source.m_pSprite->ColorTransBlt(*this,
xDest,
yDest,
xSrc,
ySrc,
cxWidth,
cyHeight);
return;
}
// Make sure we're in bounds
if (!AdjustCoords(&xSrc, &ySrc, Source.m_cxWidth, Source.m_cyHeight,
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
WORD *pSrcRow = Source.GetPixel(Source.GetRowStart(ySrc), xSrc);
WORD *pSrcRowEnd = Source.GetPixel(Source.GetRowStart(ySrc + cyHeight), xSrc);
WORD *pDestRow = GetPixel(GetRowStart(yDest), xDest);
// If we've got an alpha mask then blt using the transparency
// information.
if (Source.m_pAlpha)
{
#ifdef LATER
BYTE *pAlphaSrcRow = Source.GetAlphaValue(xSrc, ySrc);
while (pSrcRow < pSrcRowEnd)
{
BYTE *pAlphaPos = pAlphaSrcRow;
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pAlphaPos == 0)
{
pDestPos++;
pSrcPos++;
pAlphaPos++;
}
else if (*pAlphaPos == 255 || *pDestPos == 0)
{
*pDestPos++ = *pSrcPos++;
pAlphaPos++;
}
else
{
DWORD pxSource = *pSrcPos;
DWORD pxDest = *pDestPos;
DWORD dwInvTrans = (((DWORD)(*pAlphaPos)) ^ 0xff);
DWORD dwRedGreenS = ((pxSource << 8) & 0x00f80000) | (pxSource & 0x000007e0);
DWORD dwRedGreen = (((((pxDest << 8) & 0x00f80000) | (pxDest & 0x000007e0)) * dwInvTrans) >> 8) + dwRedGreenS;
DWORD dwBlue = (((pxDest & 0x1f) * dwInvTrans) >> 8) + (pxSource & 0x1f);
*pDestPos++ = (WORD)(((dwRedGreen & 0x00f80000) >> 8) | (dwRedGreen & 0x000007e0) | dwBlue);
pSrcPos++;
pAlphaPos++;
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
pAlphaSrcRow = Source.NextAlphaRow(pAlphaSrcRow);
}
#endif
}
// If we've got constant transparency then use the alpha tables
else if (Source.IsTransparent())
{
#ifdef LATER
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pSrcPos == m_wBackColor)
{
pDestPos++;
pSrcPos++;
}
else
{
// Blend the pixel using the appropriate tables
WORD rgbRed = Source.m_pRedAlphaTable[((*pSrcPos & 0xf800) >> 6) | ((*pDestPos & 0xf800) >> 11)];
WORD rgbGreen = Source.m_pGreenAlphaTable[((*pSrcPos & 0x7e0) << 1) | ((*pDestPos & 0x7e0) >> 5)];
WORD rgbBlue = Source.m_pBlueAlphaTable[(*pSrcPos & 0x1f) << 5 | (*pDestPos & 0x1f)];
*pDestPos++ = rgbRed | rgbGreen | rgbBlue;
pSrcPos++;
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
}
#endif
}
// Otherwise just blt
else
{
WORD wSrcBackColor = Source.GetBackColor();
if (iAlpha == 255)
{
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pSrcPos == wSrcBackColor)
{
pDestPos++;
pSrcPos++;
}
else
{
DWORD dwRed = (*pSrcPos & 0xf800) >> 10;
DWORD dwGreen = (*pSrcPos & 0x07e0) >> 5;
DWORD dwBlue = (*pSrcPos & 0x001f) << 1;
pSrcPos++;
DWORD dwGray = (dwRed + dwGreen + dwBlue) / 3;
*pDestPos++ = (WORD)(((dwGray << 10) & 0xf800) | (dwGray << 5) | (dwGray >> 1));
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
}
}
else if (iAlpha > 0)
{
DWORD dwInvTrans = (((DWORD)(iAlpha)) ^ 0xff);
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pSrcPos == wSrcBackColor)
{
pDestPos++;
pSrcPos++;
}
else
{
DWORD dwRed = (*pSrcPos & 0xf800) >> 10;
DWORD dwGreen = (*pSrcPos & 0x07e0) >> 5;
DWORD dwBlue = (*pSrcPos & 0x001f) << 1;
pSrcPos++;
DWORD dwGray = (iAlpha * (dwRed + dwGreen + dwBlue) / 3) >> 8;
DWORD pxSource = (WORD)(((dwGray << 10) & 0xf800) | (dwGray << 5) | (dwGray >> 1));
DWORD dwRedGreenS = ((pxSource << 8) & 0x00f80000) | (pxSource & 0x000007e0);
DWORD pxDest = *pDestPos;
DWORD dwRedGreen = (((((pxDest << 8) & 0x00f80000) | (pxDest & 0x000007e0)) * dwInvTrans) >> 8) + dwRedGreenS;
dwBlue = (((pxDest & 0x1f) * dwInvTrans) >> 8) + (pxSource & 0x1f);
*pDestPos++ = (WORD)(((dwRedGreen & 0x00f80000) >> 8) | (dwRedGreen & 0x000007e0) | dwBlue);
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
}
}
}
}
void CG16bitImage::BltLighten (int xSrc, int ySrc, int cxWidth, int cyHeight, int iAlpha, const CG16bitImage &Source, int xDest, int yDest)
// BltLighten
//
// Blt the image to the destination
{
// Make sure we're in bounds
if (!AdjustCoords(&xSrc, &ySrc, Source.m_cxWidth, Source.m_cyHeight,
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
WORD *pSrcRow = Source.GetPixel(Source.GetRowStart(ySrc), xSrc);
WORD *pSrcRowEnd = Source.GetPixel(Source.GetRowStart(ySrc + cyHeight), xSrc);
WORD *pDestRow = GetPixel(GetRowStart(yDest), xDest);
// If we've got an alpha mask then blt using the transparency
// information.
if (Source.m_pAlpha)
{
BYTE *pAlphaSrcRow = Source.GetAlphaValue(xSrc, ySrc);
while (pSrcRow < pSrcRowEnd)
{
BYTE *pAlphaPos = pAlphaSrcRow;
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pAlphaPos == 0)
{
pDestPos++;
pSrcPos++;
pAlphaPos++;
}
else
{
WORD wColor;
if (*pAlphaPos == 255)
wColor = *pSrcPos;
else
wColor = BlendPixelPM(*pDestPos, *pSrcPos, *pAlphaPos);
int iTotalDest = GetRedValue(*pDestPos) + GetGreenValue(*pDestPos) + GetBlueValue(*pDestPos);
int iTotalSrc = GetRedValue(wColor) + GetGreenValue(wColor) + GetBlueValue(wColor);
if (iTotalSrc > iTotalDest)
*pDestPos = wColor;
pSrcPos++;
pDestPos++;
pAlphaPos++;
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
pAlphaSrcRow = Source.NextAlphaRow(pAlphaSrcRow);
}
}
// If we've got constant transparency then use the alpha tables
else if (Source.IsTransparent())
{
WORD wSrcBackColor = Source.GetBackColor();
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pSrcPos == wSrcBackColor)
{
pDestPos++;
pSrcPos++;
}
else
{
// Blend the pixel using the appropriate tables
WORD rgbRed = Source.m_pRedAlphaTable[((*pSrcPos & 0xf800) >> 6) | ((*pDestPos & 0xf800) >> 11)];
WORD rgbGreen = Source.m_pGreenAlphaTable[((*pSrcPos & 0x7e0) << 1) | ((*pDestPos & 0x7e0) >> 5)];
WORD rgbBlue = Source.m_pBlueAlphaTable[(*pSrcPos & 0x1f) << 5 | (*pDestPos & 0x1f)];
int iTotalDest = GetRedValue(*pDestPos) + GetGreenValue(*pDestPos) + GetBlueValue(*pDestPos);
int iTotalSrc = rgbRed + rgbGreen + rgbBlue;
if (iTotalSrc > iTotalDest)
*pDestPos = rgbRed | rgbGreen | rgbBlue;
pDestPos++;
pSrcPos++;
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
}
}
// Otherwise just blt
else
{
WORD wSrcBackColor = Source.GetBackColor();
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pSrcPos == wSrcBackColor)
{
pDestPos++;
pSrcPos++;
}
else
{
int iTotalDest = GetRedValue(*pDestPos) + GetGreenValue(*pDestPos) + GetBlueValue(*pDestPos);
int iTotalSrc = GetRedValue(*pSrcPos) + GetGreenValue(*pSrcPos) + GetBlueValue(*pSrcPos);
if (iTotalSrc > iTotalDest)
*pDestPos = *pSrcPos;
pDestPos++;
pSrcPos++;
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
}
}
}
void CG16bitImage::BltToDC (HDC hDC, int x, int y)
// BltToDC
//
// Blt the surface to a DC
{
// Initialize a bitmap info structure
if (m_pBMI == NULL)
InitBMI(&m_pBMI);
// Blt
::SetDIBitsToDevice(hDC,
x,
y,
m_cxWidth,
m_cyHeight,
0,
0,
0,
m_cyHeight,
m_pRGB,
m_pBMI,
DIB_RGB_COLORS);
}
void CG16bitImage::BltToSurface (LPDIRECTDRAWSURFACE7 pSurface, SurfaceTypes iType)
// BltToSurface
//
// Blt the entire image to the given DirectDraw surface. We assume
// that the surface is 16-bit (5-5-5 or 5-6-5) surface.
{
if (m_pRGB)
{
// If we've already got a surface, blt using that
if (m_pSurface)
{
HRESULT hr = pSurface->Blt(NULL, m_pSurface, NULL, DDBLT_WAIT, NULL);
if (FAILED(hr))
{
::kernelDebugLogPattern("Unable to blt surface: %x", hr);
m_pSurface->Release();
m_pSurface = NULL;
}
else
return;
}
// Otherwise, do it the hard way
DDSURFACEDESC2 desc;
// Lock the surface
if (!SurfaceLock(pSurface, &desc))
return;
// Calculate some metrics
int iLinesToBlt = min(m_cyHeight, (int)desc.dwHeight);
int iPixelSize = ((iType == r8g8b8) ? sizeof(DWORD) : sizeof(WORD));
int iDWORDsPerLine = AlignUp(min(m_cxWidth, (int)desc.dwWidth) * iPixelSize / sizeof(DWORD), sizeof(DWORD));
int iSourcePitch = m_iRGBRowSize;
int iDestPitch = desc.lPitch / sizeof(DWORD);
// Blt the bitmap
DWORD *pDestLine = (DWORD *)desc.lpSurface;
DWORD *pSourceLine = (DWORD *)m_pRGB;
// Handle both 16-bit bit patterns
if (iType == r5g5b5)
{
for (int i = 0; i < iLinesToBlt; i++)
{
DWORD *pSource = pSourceLine;
DWORD *pDest = pDestLine;
DWORD *pDestEnd = pDestLine + iDWORDsPerLine;
DWORD dwData;
while (pDest < pDestEnd)
{
dwData = *pSource++;
*pDest++ = (dwData & ~0xFFE0FFE0) | ((dwData & 0xFFC0FFC0) >> 1);
}
pSourceLine += iSourcePitch;
pDestLine += iDestPitch;
}
}
else if (iType == r5g6b5)
{
for (int i = 0; i < iLinesToBlt; i++)
{
DWORD *pSource = pSourceLine;
DWORD *pDest = pDestLine;
DWORD *pDestEnd = pDestLine + iDWORDsPerLine;
while (pDest < pDestEnd)
*pDest++ = *pSource++;
pSourceLine += iSourcePitch;
pDestLine += iDestPitch;
}
}
else if (iType == r8g8b8)
{
int iUnrolled = iDWORDsPerLine / 8;
int iRemaining = iDWORDsPerLine % 8;
for (int i = 0; i < iLinesToBlt; i++)
{
WORD *pSource = (WORD *)pSourceLine;
DWORD *pDest = pDestLine;
// First do the unrolled part
// Note we add 0x70307 to add back the clipped bits (so that
// ffff = ffffff; note that this means that 0000 = 070307)
DWORD *pDestEnd = pDest + (iUnrolled * 8);
DWORD *pSourceDW = (DWORD *)pSource;
while (pDest < pDestEnd)
{
DWORD dwData = *pSourceDW++;
*pDest++ = ((dwData & 0x0000f800) << 8) | ((dwData & 0x000007e0) << 05) | ((dwData & 0x0000001f) << 03) | 0x70307;
*pDest++ = ((dwData & 0xf8000000) >> 8) | ((dwData & 0x07e00000) >> 11) | ((dwData & 0x001f0000) >> 13) | 0x70307;
dwData = *pSourceDW++;
*pDest++ = ((dwData & 0x0000f800) << 8) | ((dwData & 0x000007e0) << 05) | ((dwData & 0x0000001f) << 03) | 0x70307;
*pDest++ = ((dwData & 0xf8000000) >> 8) | ((dwData & 0x07e00000) >> 11) | ((dwData & 0x001f0000) >> 13) | 0x70307;
dwData = *pSourceDW++;
*pDest++ = ((dwData & 0x0000f800) << 8) | ((dwData & 0x000007e0) << 05) | ((dwData & 0x0000001f) << 03) | 0x70307;
*pDest++ = ((dwData & 0xf8000000) >> 8) | ((dwData & 0x07e00000) >> 11) | ((dwData & 0x001f0000) >> 13) | 0x70307;
dwData = *pSourceDW++;
*pDest++ = ((dwData & 0x0000f800) << 8) | ((dwData & 0x000007e0) << 05) | ((dwData & 0x0000001f) << 03) | 0x70307;
*pDest++ = ((dwData & 0xf8000000) >> 8) | ((dwData & 0x07e00000) >> 11) | ((dwData & 0x001f0000) >> 13) | 0x70307;
}
// Do any extra
pDestEnd = pDest + iRemaining;
pSource = (WORD *)pSourceDW;
while (pDest < pDestEnd)
{
DWORD dwData = *pSource++;
*pDest++ = ((dwData & 0xf800) << 8) | ((dwData & 0x07e0) << 5) | ((dwData & 0x001f) << 3) | 0x70307;
}
pSourceLine += iSourcePitch;
pDestLine += iDestPitch;
}
}
// Done
SurfaceUnlock(pSurface);
}
}
void CG16bitImage::BltToSurface (LPDIRECTDRAWSURFACE7 pSurface, SurfaceTypes iType, const RECT &rcDest)
// BltToSurface
//
// Blt the entire image to the given DirectDraw surface. We assume
// that the surface is 16-bit (5-5-5 or 5-6-5) surface.
{
if (m_pRGB)
{
DDSURFACEDESC2 desc;
// Lock the surface
if (!SurfaceLock(pSurface, &desc))
return;
// Calculate some metrics
int iLinesToBlt = min(m_cyHeight, (int)desc.dwHeight);
int iPixelSize = ((iType == r8g8b8) ? sizeof(DWORD) : sizeof(WORD));
int iDWORDsPerLine = AlignUp(min(m_cxWidth, (int)desc.dwWidth) * iPixelSize / sizeof(DWORD), sizeof(DWORD));
int iSourcePitch = m_iRGBRowSize;
int iDestPitch = desc.lPitch / sizeof(DWORD);
// Blt the bitmap
DWORD *pDestLine = ((DWORD *)desc.lpSurface) + (rcDest.top * iDestPitch) + (rcDest.left * iPixelSize / sizeof(DWORD));
DWORD *pSourceLine = (DWORD *)m_pRGB;
// Handle both 16-bit bit patterns
if (iType == r5g5b5)
{
for (int i = 0; i < iLinesToBlt; i++)
{
DWORD *pSource = pSourceLine;
DWORD *pDest = pDestLine;
DWORD *pDestEnd = pDestLine + iDWORDsPerLine;
DWORD dwData;
while (pDest < pDestEnd)
{
dwData = *pSource++;
*pDest++ = (dwData & ~0xFFE0FFE0) | ((dwData & 0xFFC0FFC0) >> 1);
}
pSourceLine += iSourcePitch;
pDestLine += iDestPitch;
}
}
else if (iType == r5g6b5)
{
for (int i = 0; i < iLinesToBlt; i++)
{
DWORD *pSource = pSourceLine;
DWORD *pDest = pDestLine;
DWORD *pDestEnd = pDestLine + iDWORDsPerLine;
while (pDest < pDestEnd)
*pDest++ = *pSource++;
pSourceLine += iSourcePitch;
pDestLine += iDestPitch;
}
}
else if (iType == r8g8b8)
{
for (int i = 0; i < iLinesToBlt; i++)
{
WORD *pSource = (WORD *)pSourceLine;
DWORD *pDest = pDestLine;
DWORD *pDestEnd = pDestLine + iDWORDsPerLine;
DWORD dwData;
while (pDest < pDestEnd)
{
dwData = *pSource++;
*pDest++ = ((dwData & 0xf800) << 8) | ((dwData & 0x07e0) << 5) | ((dwData & 0x001f) << 3);
}
pSourceLine += iSourcePitch;
pDestLine += iDestPitch;
}
}
// Done
SurfaceUnlock(pSurface);
}
}
void CG16bitImage::BltWithMask (int xSrc, int ySrc, int cxWidth, int cyHeight, const CG16bitImage &Mask, const CG16bitImage &Source, int xDest, int yDest)
// BltWithMask
//
// Blt the image to the destination (the mask matches the destination).
{
if (Mask.m_pAlpha == NULL)
{
Blt(xSrc, ySrc, cxWidth, cyHeight, Source, xDest, yDest);
return;
}
// Make sure we're in bounds
if (!AdjustCoords(&xSrc, &ySrc, Source.m_cxWidth, Source.m_cyHeight,
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
if (!Mask.AdjustCoords(&xSrc, &ySrc, Source.m_cxWidth, Source.m_cyHeight,
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
// Do the blt
WORD *pSrcRow = Source.GetPixel(Source.GetRowStart(ySrc), xSrc);
WORD *pSrcRowEnd = Source.GetPixel(Source.GetRowStart(ySrc + cyHeight), xSrc);
WORD *pDestRow = GetPixel(GetRowStart(yDest), xDest);
BYTE *pAlphaRow = Mask.GetAlphaValue(xDest, yDest);
while (pSrcRow < pSrcRowEnd)
{
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
BYTE *pAlphaPos = pAlphaRow;
while (pSrcPos < pSrcPosEnd)
{
if (*pAlphaPos == 255)
{
*pDestPos++ = *pSrcPos++;
pAlphaPos++;
}
else if (*pAlphaPos == 0)
{
pDestPos++;
pSrcPos++;
pAlphaPos++;
}
else
{
DWORD dTemp = *pDestPos;
DWORD sTemp = *pSrcPos;
DWORD byOpacity = *pAlphaPos;
BYTE *pAlpha5 = g_Alpha5[byOpacity];
BYTE *pAlpha6 = g_Alpha6[byOpacity];
BYTE *pAlpha5Inv = g_Alpha5[255 - byOpacity];
BYTE *pAlpha6Inv = g_Alpha6[255 - byOpacity];
DWORD dwRedResult = pAlpha5Inv[(dTemp & 0xf800) >> 11] + pAlpha5[(sTemp & 0xf800) >> 11];
DWORD dwGreenResult = pAlpha6Inv[(dTemp & 0x7e0) >> 5] + pAlpha6[(sTemp & 0x7e0) >> 5];
DWORD dwBlueResult = pAlpha5Inv[(dTemp & 0x1f)] + pAlpha5[(sTemp & 0x1f)];
*pDestPos = (WORD)((dwRedResult << 11) | (dwGreenResult << 5) | (dwBlueResult));
pDestPos++;
pSrcPos++;
pAlphaPos++;
}
}
pSrcRow = Source.NextRow(pSrcRow);
pDestRow = NextRow(pDestRow);
pAlphaRow = Mask.NextAlphaRow(pAlphaRow);
}
}
void CG16bitImage::ColorTransBlt (int xSrc, int ySrc, int cxWidth, int cyHeight, DWORD dwOpacity, const CG16bitImage &Source, int xDest, int yDest)
// Blt
//
// Blt the image to the destination
{
// Deal with sprite sources
if (Source.m_pSprite)
{
Source.m_pSprite->ColorTransBlt(*this,
xDest,
yDest,
xSrc,
ySrc,
cxWidth,
cyHeight);
return;
}
// Make sure we're in bounds
if (!AdjustCoords(&xSrc, &ySrc, Source.m_cxWidth, Source.m_cyHeight,
&xDest, &yDest,
&cxWidth, &cyHeight))
return;
WORD *pSrcRow = Source.GetPixel(Source.GetRowStart(ySrc), xSrc);
WORD *pSrcRowEnd = Source.GetPixel(Source.GetRowStart(ySrc + cyHeight), xSrc);
WORD *pDestRow = GetPixel(GetRowStart(yDest), xDest);
// If we've got an alpha mask then blt using the transparency
// information.
if (Source.m_pAlpha)
{
BYTE *pAlphaSrcRow = Source.GetAlphaValue(xSrc, ySrc);
if (dwOpacity == 255)
{
while (pSrcRow < pSrcRowEnd)
{
BYTE *pAlphaPos = pAlphaSrcRow;
WORD *pSrcPos = pSrcRow;
WORD *pSrcPosEnd = pSrcRow + cxWidth;
WORD *pDestPos = pDestRow;
while (pSrcPos < pSrcPosEnd)
if (*pAlphaPos == 0)
{
pDestPos++;
pSrcPos++;
pAlphaPos++;
}
else if (*pAlphaPos == 255 || *pDestPos == 0)
{
*pDestPos++ = *pSrcPos++;
pAlphaPos++;
}
else
{
DWORD pxSource = *pSrcPos;
DWORD pxDest = *pDestPos;
// x ^ 0xff is the same as 255 - x
// | 0x07 so that we round-up
// + 1 because below we divide by 256 instead of 255.
// LATER: Use a table lookup
DWORD dwInvTrans = ((((DWORD)(*pAlphaPos)) ^ 0xff) | 0x07) + 1;
#ifdef BLT_RANGE_CHECK
WORD wRedSrc = (*pSrcPos >> 11) & 0x1f;
WORD wGreenSrc = (*pSrcPos >> 5) & 0x3f;
WORD wBlueSrc = (*pSrcPos) & 0x1f;
WORD wRedDest = ((WORD)dwInvTrans * ((*pDestPos >> 11) & 0x1f)) >> 8;
WORD wGreenDest = ((WORD)dwInvTrans * ((*pDestPos >> 5) & 0x3f)) >> 8;
WORD wBlueDest = ((WORD)dwInvTrans * ((*pDestPos) & 0x1f)) >> 8;
WORD wRedResult = Min((WORD)0x1f, (WORD)(wRedSrc + wRedDest));
WORD wGreenResult = Min((WORD)0x3f, (WORD)(wGreenSrc + wGreenDest));
WORD wBlueResult = Min((WORD)0x1f, (WORD)(wBlueSrc + wBlueDest));
*pDestPos++ = (wRedResult << 11) | (wGreenResult << 5) | wBlueResult;