//--------------------------------------------------------------------------
void Texture::_loadImages( const ConstImagePtrList& images )
{
if(images.size() < 1)
OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Cannot load empty vector of images",
"Texture::loadImages");
// Set desired texture size and properties from images[0]
mSrcWidth = mWidth = images[0]->getWidth();
mSrcHeight = mHeight = images[0]->getHeight();
mSrcDepth = mDepth = images[0]->getDepth();
// Get source image format and adjust if required
mSrcFormat = images[0]->getFormat();
if (mTreatLuminanceAsAlpha && mSrcFormat == PF_L8)
{
mSrcFormat = PF_A8;
}
if (mDesiredFormat != PF_UNKNOWN)
{
// If have desired format, use it
mFormat = mDesiredFormat;
}
else
{
// Get the format according with desired bit depth
mFormat = PixelUtil::getFormatForBitDepths(mSrcFormat, mDesiredIntegerBitDepth, mDesiredFloatBitDepth);
}
// The custom mipmaps in the image have priority over everything
size_t imageMips = images[0]->getNumMipmaps();
if(imageMips > 0) {
mNumMipmaps = mNumRequestedMipmaps = images[0]->getNumMipmaps();
// Disable flag for auto mip generation
mUsage &= ~TU_AUTOMIPMAP;
}
// Create the texture
createInternalResources();
// Check if we're loading one image with multiple faces
// or a vector of images representing the faces
size_t faces;
bool multiImage; // Load from multiple images?
if(images.size() > 1)
{
faces = images.size();
multiImage = true;
}
else
{
faces = images[0]->getNumFaces();
multiImage = false;
}
// Check wether number of faces in images exceeds number of faces
// in this texture. If so, clamp it.
if(faces > getNumFaces())
faces = getNumFaces();
if (TextureManager::getSingleton().getVerbose()) {
// Say what we're doing
StringUtil::StrStreamType str;
str << "Texture: " << mName << ": Loading " << faces << " faces"
<< "(" << PixelUtil::getFormatName(images[0]->getFormat()) << "," <<
images[0]->getWidth() << "x" << images[0]->getHeight() << "x" << images[0]->getDepth() <<
") with ";
if (!(mMipmapsHardwareGenerated && mNumMipmaps == 0))
str << mNumMipmaps;
if(mUsage & TU_AUTOMIPMAP)
{
if (mMipmapsHardwareGenerated)
str << " hardware";
str << " generated mipmaps";
}
else
{
str << " custom mipmaps";
}
if(multiImage)
str << " from multiple Images.";
else
str << " from Image.";
// Scoped
{
// Print data about first destination surface
HardwarePixelBufferSharedPtr buf = getBuffer(0, 0);
str << " Internal format is " << PixelUtil::getFormatName(buf->getFormat()) <<
"," << buf->getWidth() << "x" << buf->getHeight() << "x" << buf->getDepth() << ".";
}
LogManager::getSingleton().logMessage(
LML_NORMAL, str.str());
}
// Main loading loop
// imageMips == 0 if the image has no custom mipmaps, otherwise contains the number of custom mips
for(size_t mip = 0; mip<=imageMips; ++mip)
{
for(size_t i = 0; i < faces; ++i)
{
PixelBox src;
if(multiImage)
{
// Load from multiple images
src = images[i]->getPixelBox(0, mip);
}
else
{
// Load from faces of images[0]
src = images[0]->getPixelBox(i, mip);
}
// Sets to treated format in case is difference
src.format = mSrcFormat;
if(mGamma != 1.0f) {
// Apply gamma correction
// Do not overwrite original image but do gamma correction in temporary buffer
MemoryDataStreamPtr buf; // for scoped deletion of conversion buffer
buf.bind(OGRE_NEW MemoryDataStream(
PixelUtil::getMemorySize(
src.getWidth(), src.getHeight(), src.getDepth(), src.format)));
PixelBox corrected = PixelBox(src.getWidth(), src.getHeight(), src.getDepth(), src.format, buf->getPtr());
PixelUtil::bulkPixelConversion(src, corrected);
Image::applyGamma(static_cast<uint8*>(corrected.data), mGamma, corrected.getConsecutiveSize(),
static_cast<uchar>(PixelUtil::getNumElemBits(src.format)));
// Destination: entire texture. blitFromMemory does the scaling to
// a power of two for us when needed
getBuffer(i, mip)->blitFromMemory(corrected);
}
else
{
// Destination: entire texture. blitFromMemory does the scaling to
// a power of two for us when needed
getBuffer(i, mip)->blitFromMemory(src);
}
}
}
// Update size (the final size, not including temp space)
mSize = getNumFaces() * PixelUtil::getMemorySize(mWidth, mHeight, mDepth, mFormat);
}
void GLTexture::createRenderTexture(void)
{
// Create the GL texture
// This already does everything neccessary
createInternalResources();
}
