/**
* @brief
* Constructor
*
* @param[in] cOldImageBuffer
* Old image buffer (MUST have valid data)
* @param[out] cImageBuffer
* Image buffer (MUST have valid data)
* @param[in] nNewWidth
* New width
* @param[in] nNewHeight
* New height
* @param[in] nOldWidth
* Old height
* @param[in] nOldHeight
* Old height
* @param[in] mFilter
* Filter matrix
*/
ScaleDownData(const ImageBuffer &cOldImageBuffer, ImageBuffer &cImageBuffer, uint32 nNewWidth, uint32 nNewHeight, uint32 nOldWidth, uint32 nOldHeight, const Matrix3x3 &mFilter)
{
// [TODO] Resize images in linear space instead of gamma space! Maybe we should add image space information to a image so we now in which space the image data is stored? (linear, gamma...)
// Scale factors
const float fToOriginalWidthFactor = static_cast<float>(nOldWidth) /nNewWidth;
const float fToOriginalHeightFactor = static_cast<float>(nOldHeight)/nNewHeight;
// Get the number of components
const uint32 nNumOfComponents = cOldImageBuffer.GetComponentsPerPixel();
// Loop through all components
DataType *pNewData = reinterpret_cast<DataType*>(cImageBuffer.GetData());
const DataType *pOldData = reinterpret_cast<const DataType*>(cOldImageBuffer.GetData());
for (uint32 nComponent=0; nComponent<nNumOfComponents; nComponent++) {
// Loop through x
for (uint32 nX=0; nX<nNewWidth; nX++) {
// Loop through y
for (uint32 nY=0; nY<nNewHeight; nY++) {
// Get the original byte
const uint32 nOriginalX = static_cast<uint32>(nX*fToOriginalWidthFactor);
const uint32 nOriginalY = static_cast<uint32>(nY*fToOriginalHeightFactor);
// Sum up
double fSum = 0.0f;
double fTotalSum = 0.0f;
for (uint32 nFilterX=0; nFilterX<3; nFilterX++) {
for (uint32 nFilterY=0; nFilterY<3; nFilterY++) {
// Get the current position on the original image
const int nCurrentX = (nOriginalX-1) + nFilterX;
const int nCurrentY = (nOriginalY-1) + nFilterY;
// Is this current position inside the original image?
if (nCurrentX >= 0 && nCurrentY >= 0 &&
nCurrentX < static_cast<int>(nOldWidth) && nCurrentY < static_cast<int>(nOldHeight)) {
// Jap, get the factor to use this component with
const float fFactor = mFilter.fM33[nFilterX][nFilterY];
// Now we've got one more component within our sum
fTotalSum += fFactor;
// Get the component value of the original image
const DataType nOriginalByte = pOldData[(nCurrentY*nOldWidth + nCurrentX)*nNumOfComponents + nComponent];
// Add component value of the original image with the given factor
fSum += nOriginalByte*fFactor;
}
}
}
// Set new byte
pNewData[(nY*nNewWidth + nX)*nNumOfComponents + nComponent] = DataType(fSum/fTotalSum);
}
}
}
}
//[-------------------------------------------------------]
//[ Global functions ]
//[-------------------------------------------------------]
// [TODO] This is just an experimental half image scale function without any filter - better as nothing for now!
void ScaleDownHalfData(const ImageBuffer &cOldImageBuffer, ImageBuffer &cImageBuffer, uint32 nNewWidth, uint32 nNewHeight, uint32 nOldWidth, uint32 nOldHeight, const Matrix3x3 &mFilter)
{
// Scale factors
const float fToOriginalWidthFactor = static_cast<float>(nOldWidth) /nNewWidth;
const float fToOriginalHeightFactor = static_cast<float>(nOldHeight)/nNewHeight;
// Get the number of components
const uint32 nNumOfComponents = cOldImageBuffer.GetComponentsPerPixel();
// Loop through all components
short *pNewData = reinterpret_cast<short*>(cImageBuffer.GetData());
const short *pOldData = reinterpret_cast<const short*>(cOldImageBuffer.GetData());
for (uint32 nComponent=0; nComponent<nNumOfComponents; nComponent++) {
// Loop through x
for (uint32 nX=0; nX<nNewWidth; nX++) {
// Loop through y
for (uint32 nY=0; nY<nNewHeight; nY++) {
// Get the original byte
const uint32 nOriginalX = static_cast<uint32>(nX*fToOriginalWidthFactor);
const uint32 nOriginalY = static_cast<uint32>(nY*fToOriginalHeightFactor);
// Get data
short nOriginalByte = 0;
{
// Get the current position on the original image
const int nCurrentX = (nOriginalX-1) + 1;
const int nCurrentY = (nOriginalY-1) + 1;
// Is this current position inside the original image?
if (nCurrentX >= 0 && nCurrentY >= 0 &&
nCurrentX < static_cast<int>(nOldWidth) && nCurrentY < static_cast<int>(nOldHeight)) {
// Get the component value of the original image
nOriginalByte = pOldData[(nCurrentY*nOldWidth + nCurrentX)*nNumOfComponents + nComponent];
}
}
// Set new byte
pNewData[(nY*nNewWidth + nX)*nNumOfComponents + nComponent] = nOriginalByte;
}
}
}
}
//[-------------------------------------------------------]
//[ Private virtual PLScene::SceneNode functions ]
//[-------------------------------------------------------]
void PGImage::InitFunction()
{
// Call base implementation
SNParticleGroup::InitFunction();
// Load image
Image cImage;
if (cImage.LoadByFilename(ImageFilename.Get())) {
// Get the image buffer
ImageBuffer *pImageBuffer = cImage.GetBuffer();
if (pImageBuffer) {
const uint32 nWidth = pImageBuffer->GetSize().x;
const uint32 nHeight = pImageBuffer->GetSize().y;
const uint32 nPixels = nWidth*nHeight;
const uint8 *pData = pImageBuffer->GetData();
const uint32 nColorComponents = pImageBuffer->GetComponentsPerPixel();
if (nColorComponents == 3 || nColorComponents == 4) {
// Get total number of required particles
uint32 nParticles = 0;
for (uint32 i=0; i<nPixels; i++) {
// Place particle at this image position?
uint8 nDifR = static_cast<uint8>(Math::Abs(pData[0]-RedColorKey));
uint8 nDifG = static_cast<uint8>(Math::Abs(pData[1]-GreenColorKey));
uint8 nDifB = static_cast<uint8>(Math::Abs(pData[2]-BlueColorKey));
if (!(nDifR <= ColorKeyTolerance && nDifG <= ColorKeyTolerance && nDifB <= ColorKeyTolerance))
nParticles++; // A particle here, please
pData += nColorComponents;
}
pData = pImageBuffer->GetData();
// Create the particles
InitParticles(nParticles);
// Setup the particles
for (int nY=nHeight-1; nY>=0; nY--) {
for (uint32 nX=0; nX<nWidth; nX++) {
// Place particle at this image position?
uint8 nDifR = static_cast<uint8>(Math::Abs(pData[0]-RedColorKey));
uint8 nDifG = static_cast<uint8>(Math::Abs(pData[1]-GreenColorKey));
uint8 nDifB = static_cast<uint8>(Math::Abs(pData[2]-BlueColorKey));
if (nDifR <= ColorKeyTolerance && nDifG <= ColorKeyTolerance && nDifB <= ColorKeyTolerance) {
// No particle here, please
pData += nColorComponents;
} else {
// Setup particle
Particle *pParticle = AddParticle();
if (pParticle) {
pParticle->vColor.r = pData[0]/255.0f;
pParticle->vColor.g = pData[1]/255.0f;
pParticle->vColor.b = pData[2]/255.0f;
pParticle->vColor.a = nColorComponents == 4 ? pData[3]/255.0f : 1.0f;
pData += nColorComponents;
pParticle->fEnergy = 1.0f;
pParticle->fCustom2 = 0.5f+Math::GetRandFloat()*2.0f;
if (Math::GetRandFloat() > 0.5f)
pParticle->fCustom2 = -pParticle->fCustom2;
pParticle->fSize = (1.0f+(static_cast<float>(Math::GetRand() % 1000)/500))*ImageScale;
pParticle->vPos.x = pParticle->vFixPos.x = pParticle->vDistortion.x = static_cast<float>(nX*ImageScale);
pParticle->vPos.y = pParticle->vFixPos.y = pParticle->vDistortion.y = static_cast<float>(nY*ImageScale);
pParticle->vPos.z = pParticle->vFixPos.z = pParticle->vDistortion.z = 0.0f;
pParticle->fCustom1 = pParticle->fSize;
pParticle->fCustom2 *= 2;
} else {
// Error!
nY = nHeight;
nX = nWidth;
}
}
}
}
}
}
}
}
bool ImageLoaderJPG::SaveParams(const Image &cImage, File &cFile, uint32 nQuality)
{
// Get the image buffer
ImageBuffer *pImageBuffer = cImage.GetBuffer();
if (pImageBuffer && pImageBuffer->GetBytesPerRow()) {
// We only support 1 or 3 byte per pixel component
if (pImageBuffer->GetBytesPerPixelComponent() == 1 || pImageBuffer->GetBytesPerPixelComponent() == 3) {
jpeg_compress_struct sInfo;
jpeg_error_mgr sError;
sInfo.err = jpeg_std_error(&sError);
sInfo.err->error_exit = ExitErrorHandle;
jpeg_create_compress(&sInfo);
const int nComponents = pImageBuffer->GetComponentsPerPixel();
sInfo.in_color_space = (nComponents == 1)? JCS_GRAYSCALE : JCS_RGB;
jpeg_set_defaults(&sInfo);
sInfo.input_components = nComponents;
sInfo.num_components = (nComponents == 1) ? 1 : 3;
sInfo.image_width = pImageBuffer->GetSize().x;
sInfo.image_height = pImageBuffer->GetSize().y;
sInfo.data_precision = 8;
sInfo.input_gamma = 1.0;
// Set the user given parameter
jpeg_set_quality(&sInfo, nQuality, FALSE);
jpeg_write_init(&sInfo, &cFile);
jpeg_start_compress(&sInfo, TRUE);
// Is the input image RGBA? If so, we really need to throw away the alpha channel...
if (nComponents == 4) {
// Allocate memory for an converted output row
uint8 *pOutputRow = new uint8[sInfo.image_width*sInfo.num_components];
// Write the data
const uint8 *pCurrentImageData = pImageBuffer->GetData();
for (uint32 y=0; y<sInfo.image_height; y++) {
// Convert the current row
for (uint32 x=0; x<sInfo.image_width; x++) {
const uint8 *pnPixelIn = &pCurrentImageData[x*4];
uint8 *pnPixelOut = &pOutputRow[x*3];
pnPixelOut[0] = pnPixelIn[0];
pnPixelOut[1] = pnPixelIn[1];
pnPixelOut[2] = pnPixelIn[2];
}
// Write out the current row
jpeg_write_scanlines(&sInfo, &pOutputRow, 1);
// Next, please
pCurrentImageData += pImageBuffer->GetBytesPerRow();
}
// Free the allocated output row memory
delete [] pOutputRow;
} else {
// Write the data
uint8 *pCurrentImageData = pImageBuffer->GetData();
for (uint32 y=0; y<sInfo.image_height; y++) {
jpeg_write_scanlines(&sInfo, &pCurrentImageData, 1);
pCurrentImageData += pImageBuffer->GetBytesPerRow();
}
}
// Cleanup
jpeg_finish_compress(&sInfo);
jpeg_destroy_compress(&sInfo);
// Done
return true;
} else {
// Error: Unsupported number of bytes per pixel component
}
} else {
// Error: Failed to get image buffer
}
// Error!
return false;
}