Martin,
This code below seems to work well:
...
checking if the band is a paletted one
...
else if (bandPalette)
{
// Paletted map
int pixelSpace=1*numBytesPerPixel;
int lineSpace=destWidth * pixelSpace;
unsigned char *rawImageData;
rawImageData = new unsigned char[destWidth * destHeight * pixelSpace];
imageData = new unsigned char[destWidth * destHeight * 3/*RGBA*/];
pixelFormat = GL_RGBA;
internalFormat = GL_RGBA;
bandPalette->RasterIO(GF_Read,windowX,windowY,windowWidth,windowHeight,(void*)
(rawImageData),destWidth,destHeight,targetGDALType,pixelSpace,lineSpace);
for (int i = 0; i < destWidth * destHeight; i++)
{
const GDALColorEntry *colorEntry =
bandPalette->GetColorTable()->GetColorEntry(rawImageData[i]);
GDALPaletteInterp interp =
bandPalette->GetColorTable()->GetPaletteInterpretation();
if (!colorEntry)
{
...
}
else
{
if (interp == GPI_RGB)
{
imageData[3*i+0] = colorEntry->c3;
imageData[3*i+1] = colorEntry->c2;
imageData[3*i+2] = colorEntry->c1;
// imageData[3*i+3] = colorEntry->c4;
}
}
}
delete [] rawImageData;
}
else
{
}
void * ptr_dest = NULL;
void * ptr_src = NULL;
if (imageData)
{
BITMAPINFOHEADER bih;
int size = sizeof(BITMAPINFOHEADER) ;
memset(&bih, 0, size);
bih.biSize = size;
bih.biWidth = ((((int) destWidth * 8) + 31) & ~31) >> 3;
bih.biHeight = destHeight * -1;
bih.biPlanes = 1;
bih.biBitCount = 24;
bih.biCompression = BI_RGB;
pdc = new CDC ;
pdc->CreateCompatibleDC(NULL);
hbmp = CreateDIBSection( pdc->GetSafeHdc(),(BITMAPINFO*)&bih,
DIB_PAL_COLORS,//DIB_RGB_COLORS,
&ptr_dest ,
NULL,
0);
unsigned int dibwidth = m_bih.biWidth;
GByte* src = (GByte*) imageData;
for (int row = 0; row < destHeight; row++)
{
ptr_dest = dest + row * dibwidth* 3;
ptr_src = src + row * destWidth *3;
memcpy(ptr_dest, ptr_src, destWidth* 3);
}
}
Your code is similar, though i haven't checked the GetColorEntryAsRGB
function yet
Best Regards
--
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