mirror of
https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
synced 2024-11-15 20:23:47 +00:00
Changed: Allow to resample Luminance (grayscale) bitmaps
This commit is contained in:
kervala
parent
b141d80267
commit
0911b1a105
2 changed files with 273 additions and 7 deletions
|
|
@ -236,6 +236,34 @@ private :
|
|||
sint32 nDestWidth, sint32 nDestHeight);
|
||||
|
||||
|
||||
/**
|
||||
* The grayscale resample function
|
||||
* \param pSrc grayscale 8-bits array
|
||||
* \param pDest grayscale 8-bits array for storing resampled texture
|
||||
* \param nSrcWidth original width
|
||||
* \param nSrcHeight original height
|
||||
* \param nDestWidth width after resample
|
||||
* \param nDestHeight height after resample
|
||||
*/
|
||||
void resamplePicture8 (const uint8 *pSrc, uint8 *pDest,
|
||||
sint32 nSrcWidth, sint32 nSrcHeight,
|
||||
sint32 nDestWidth, sint32 nDestHeight);
|
||||
|
||||
/**
|
||||
* The FAST resample function : works only when reducing the size by two
|
||||
* and when the image is square
|
||||
* \param pSrc grayscale 8-bits array
|
||||
* \param pDest grayscale 8-bits array for storing resampled texture
|
||||
* \param nSrcWidth original width
|
||||
* \param nSrcHeight original height
|
||||
* \param nDestWidth width after resample
|
||||
* \param nDestHeight height after resample
|
||||
*/
|
||||
void resamplePicture8Fast (const uint8 *pSrc, uint8 *pDest,
|
||||
sint32 nSrcWidth, sint32 nSrcHeight,
|
||||
sint32 nDestWidth, sint32 nDestHeight);
|
||||
|
||||
|
||||
/**
|
||||
* Quadratic interpolator
|
||||
* \return the interpolation in (x,y) of the values (xy**)
|
||||
|
|
|
|||
|
|
@ -1785,7 +1785,7 @@ void CBitmap::releaseMipMaps()
|
|||
\*-------------------------------------------------------------------*/
|
||||
void CBitmap::resample(sint32 nNewWidth, sint32 nNewHeight)
|
||||
{
|
||||
nlassert(PixelFormat == RGBA);
|
||||
nlassert(PixelFormat == RGBA || PixelFormat == Luminance);
|
||||
bool needRebuild = false;
|
||||
|
||||
// Deleting mipmaps
|
||||
|
|
@ -1804,13 +1804,27 @@ void CBitmap::resample(sint32 nNewWidth, sint32 nNewHeight)
|
|||
|
||||
//logResample("Resample: 30");
|
||||
CObjectVector<uint8> pDestui;
|
||||
pDestui.resize(nNewWidth*nNewHeight*4);
|
||||
//logResample("Resample: 40");
|
||||
NLMISC::CRGBA *pDestRgba = (NLMISC::CRGBA*)&pDestui[0];
|
||||
//logResample("Resample: 50");
|
||||
|
||||
resamplePicture32 ((NLMISC::CRGBA*)&_Data[0][0], pDestRgba, _Width, _Height, nNewWidth, nNewHeight);
|
||||
//logResample("Resample: 60");
|
||||
if (PixelFormat == RGBA)
|
||||
{
|
||||
pDestui.resize(nNewWidth*nNewHeight*4);
|
||||
//logResample("Resample: 40");
|
||||
NLMISC::CRGBA *pDestRgba = (NLMISC::CRGBA*)&pDestui[0];
|
||||
//logResample("Resample: 50");
|
||||
|
||||
resamplePicture32 ((NLMISC::CRGBA*)&_Data[0][0], pDestRgba, _Width, _Height, nNewWidth, nNewHeight);
|
||||
//logResample("Resample: 60");
|
||||
}
|
||||
else if (PixelFormat == Luminance)
|
||||
{
|
||||
pDestui.resize(nNewWidth*nNewHeight);
|
||||
//logResample("Resample: 40");
|
||||
uint8 *pDestGray = &pDestui[0];
|
||||
//logResample("Resample: 50");
|
||||
|
||||
resamplePicture8 (&_Data[0][0], pDestGray, _Width, _Height, nNewWidth, nNewHeight);
|
||||
//logResample("Resample: 60");
|
||||
}
|
||||
|
||||
NLMISC::contReset(_Data[0]); // free memory
|
||||
//logResample("Resample: 70");
|
||||
|
|
@ -2126,6 +2140,230 @@ void CBitmap::resamplePicture32Fast (const NLMISC::CRGBA *pSrc, NLMISC::CRGBA *p
|
|||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------*\
|
||||
resamplePicture32
|
||||
\*-------------------------------------------------------------------*/
|
||||
void CBitmap::resamplePicture8 (const uint8 *pSrc, uint8 *pDest,
|
||||
sint32 nSrcWidth, sint32 nSrcHeight,
|
||||
sint32 nDestWidth, sint32 nDestHeight)
|
||||
{
|
||||
//logResample("RP8: 0 pSrc=%p pDest=%p, Src=%d x %d Dest=%d x %d", pSrc, pDest, nSrcWidth, nSrcHeight, nDestWidth, nDestHeight);
|
||||
if ((nSrcWidth<=0)||(nSrcHeight<=0)||(nDestHeight<=0)||(nDestHeight<=0))
|
||||
return;
|
||||
|
||||
// If we're reducing it by 2, call the fast resample
|
||||
if (((nSrcHeight / 2) == nDestHeight) && ((nSrcHeight % 2) == 0) &&
|
||||
((nSrcWidth / 2) == nDestWidth) && ((nSrcWidth % 2) == 0))
|
||||
{
|
||||
resamplePicture8Fast(pSrc, pDest, nSrcWidth, nSrcHeight, nDestWidth, nDestHeight);
|
||||
return;
|
||||
}
|
||||
|
||||
bool bXMag=(nDestWidth>=nSrcWidth);
|
||||
bool bYMag=(nDestHeight>=nSrcHeight);
|
||||
bool bXEq=(nDestWidth==nSrcWidth);
|
||||
bool bYEq=(nDestHeight==nSrcHeight);
|
||||
std::vector<float> pIterm (nDestWidth*nSrcHeight);
|
||||
|
||||
if (bXMag)
|
||||
{
|
||||
float fXdelta=(float)(nSrcWidth)/(float)(nDestWidth);
|
||||
float *pItermPtr=&*pIterm.begin();
|
||||
sint32 nY;
|
||||
for (nY=0; nY<nSrcHeight; nY++)
|
||||
{
|
||||
const uint8 *pSrcLine=pSrc;
|
||||
float fX=0.f;
|
||||
sint32 nX;
|
||||
for (nX=0; nX<nDestWidth; nX++)
|
||||
{
|
||||
float fVirgule=fX-(float)floor(fX);
|
||||
nlassert (fVirgule>=0.f);
|
||||
float vColor;
|
||||
if (fVirgule>=0.5f)
|
||||
{
|
||||
if (fX<(float)(nSrcWidth-1))
|
||||
{
|
||||
float vColor1 (pSrcLine[(sint32)floor(fX)]);
|
||||
float vColor2 (pSrcLine[(sint32)floor(fX)+1]);
|
||||
vColor=vColor1*(1.5f-fVirgule)+vColor2*(fVirgule-0.5f);
|
||||
}
|
||||
else
|
||||
vColor = float(pSrcLine[(sint32)floor(fX)]);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (fX>=1.f)
|
||||
{
|
||||
float vColor1 (pSrcLine[(sint32)floor(fX)]);
|
||||
float vColor2 (pSrcLine[(sint32)floor(fX)-1]);
|
||||
vColor = vColor1*(0.5f+fVirgule)+vColor2*(0.5f-fVirgule);
|
||||
}
|
||||
else
|
||||
vColor = float (pSrcLine[(sint32)floor(fX)]);
|
||||
}
|
||||
*(pItermPtr++)=vColor;
|
||||
fX+=fXdelta;
|
||||
}
|
||||
pSrc+=nSrcWidth;
|
||||
}
|
||||
}
|
||||
else if (bXEq)
|
||||
{
|
||||
float *pItermPtr=&*pIterm.begin();
|
||||
for (sint32 nY=0; nY<nSrcHeight; nY++)
|
||||
{
|
||||
const uint8 *pSrcLine=pSrc;
|
||||
sint32 nX;
|
||||
for (nX=0; nX<nDestWidth; nX++)
|
||||
*(pItermPtr++) = float (pSrcLine[nX]);
|
||||
pSrc+=nSrcWidth;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
double fXdelta=(double)(nSrcWidth)/(double)(nDestWidth);
|
||||
nlassert (fXdelta>1.f);
|
||||
float *pItermPtr=&*pIterm.begin();
|
||||
sint32 nY;
|
||||
for (nY=0; nY<nSrcHeight; nY++)
|
||||
{
|
||||
const uint8 *pSrcLine=pSrc;
|
||||
double fX=0.f;
|
||||
sint32 nX;
|
||||
for (nX=0; nX<nDestWidth; nX++)
|
||||
{
|
||||
float vColor = 0.f;
|
||||
double fFinal=fX+fXdelta;
|
||||
while ((fX<fFinal)&&((sint32)fX!=nSrcWidth))
|
||||
{
|
||||
double fNext=(double)floor (fX)+1.f;
|
||||
if (fNext>fFinal)
|
||||
fNext=fFinal;
|
||||
vColor+=((float)(fNext-fX))* float (pSrcLine[(sint32)floor(fX)]);
|
||||
fX=fNext;
|
||||
}
|
||||
fX = fFinal; // ensure fX == fFinal
|
||||
vColor/=(float)fXdelta;
|
||||
*(pItermPtr++)=vColor;
|
||||
}
|
||||
pSrc+=nSrcWidth;
|
||||
}
|
||||
}
|
||||
|
||||
if (bYMag)
|
||||
{
|
||||
double fYdelta=(double)(nSrcHeight)/(double)(nDestHeight);
|
||||
sint32 nX;
|
||||
for (nX=0; nX<nDestWidth; nX++)
|
||||
{
|
||||
double fY=0.f;
|
||||
sint32 nY;
|
||||
for (nY=0; nY<nDestHeight; nY++)
|
||||
{
|
||||
double fVirgule=fY-(double)floor(fY);
|
||||
nlassert (fVirgule>=0.f);
|
||||
float vColor;
|
||||
if (fVirgule>=0.5f)
|
||||
{
|
||||
if (fY<(double)(nSrcHeight-1))
|
||||
{
|
||||
float vColor1=pIterm[((sint32)floor(fY))*nDestWidth+nX];
|
||||
float vColor2=pIterm[(((sint32)floor(fY))+1)*nDestWidth+nX];
|
||||
vColor=vColor1*(1.5f-(float)fVirgule)+vColor2*((float)fVirgule-0.5f);
|
||||
}
|
||||
else
|
||||
vColor=pIterm[((sint32)floor(fY))*nDestWidth+nX];
|
||||
}
|
||||
else
|
||||
{
|
||||
if (fY>=1.f)
|
||||
{
|
||||
float vColor1=pIterm[((sint32)floor(fY))*nDestWidth+nX];
|
||||
float vColor2=pIterm[(((sint32)floor(fY))-1)*nDestWidth+nX];
|
||||
vColor=vColor1*(0.5f+(float)fVirgule)+vColor2*(0.5f-(float)fVirgule);
|
||||
}
|
||||
else
|
||||
vColor=pIterm[((sint32)floor(fY))*nDestWidth+nX];
|
||||
}
|
||||
pDest[nX+nY*nDestWidth]=vColor;
|
||||
fY+=fYdelta;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (bYEq)
|
||||
{
|
||||
for (sint32 nX=0; nX<nDestWidth; nX++)
|
||||
{
|
||||
sint32 nY;
|
||||
for (nY=0; nY<nDestHeight; nY++)
|
||||
{
|
||||
pDest[nX+nY*nDestWidth]=pIterm[nY*nDestWidth+nX];
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
double fYdelta=(double)(nSrcHeight)/(double)(nDestHeight);
|
||||
nlassert (fYdelta>1.f);
|
||||
sint32 nX;
|
||||
for (nX=0; nX<nDestWidth; nX++)
|
||||
{
|
||||
double fY=0.f;
|
||||
sint32 nY;
|
||||
for (nY=0; nY<nDestHeight; nY++)
|
||||
{
|
||||
float vColor = 0.f;
|
||||
double fFinal=fY+fYdelta;
|
||||
while ((fY<fFinal)&&((sint32)fY!=nSrcHeight))
|
||||
{
|
||||
double fNext=(double)floor (fY)+1.f;
|
||||
if (fNext>fFinal)
|
||||
fNext=fFinal;
|
||||
vColor+=((float)(fNext-fY))*pIterm[((sint32)floor(fY))*nDestWidth+nX];
|
||||
fY=fNext;
|
||||
}
|
||||
vColor/=(float)fYdelta;
|
||||
pDest[nX+nY*nDestWidth]=vColor;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------*\
|
||||
resamplePicture8Fast
|
||||
\*-------------------------------------------------------------------*/
|
||||
void CBitmap::resamplePicture8Fast (const uint8 *pSrc, uint8 *pDest,
|
||||
sint32 nSrcWidth, sint32 nSrcHeight,
|
||||
sint32 nDestWidth, sint32 nDestHeight)
|
||||
{
|
||||
// the image is divided by two : 1 pixel in dest = 4 pixels in src
|
||||
// the resulting pixel in dest is an average of the four pixels in src
|
||||
|
||||
nlassert(nSrcWidth % 2 == 0);
|
||||
nlassert(nSrcHeight % 2 == 0);
|
||||
nlassert(nSrcWidth / 2 == nDestWidth);
|
||||
nlassert(nSrcHeight / 2 == nDestHeight);
|
||||
|
||||
sint32 x, y, twoX, twoSrcWidthByY;
|
||||
|
||||
for (y=0 ; y<nDestHeight ; y++)
|
||||
{
|
||||
twoSrcWidthByY = 2*nSrcWidth*y;
|
||||
for (x=0 ; x<nDestWidth ; x++)
|
||||
{
|
||||
twoX = 2*x;
|
||||
pDest[x+y*nDestWidth] = (
|
||||
(uint)pSrc[twoX + twoSrcWidthByY ]+
|
||||
(uint)pSrc[twoX + twoSrcWidthByY + nSrcWidth ]+
|
||||
(uint)pSrc[twoX+1 + twoSrcWidthByY ]+
|
||||
(uint)pSrc[twoX+1 + twoSrcWidthByY + nSrcWidth ]+1)>>2;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------*\
|
||||
readTGA
|
||||
|
|
|
|||
Loading…
Reference in a new issue