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#include "imagemanager.hpp"
#include <cassert>
#include <osgDB/Registry>
#include <components/debug/debuglog.hpp>
#include <components/misc/pathhelpers.hpp>
#include <components/sceneutil/glextensions.hpp>
#include <components/vfs/manager.hpp>
#include <components/vfs/pathutil.hpp>
#include "objectcache.hpp"
#ifdef OSG_LIBRARY_STATIC
// This list of plugins should match with the list in the top-level CMakelists.txt.
USE_OSGPLUGIN(png)
USE_OSGPLUGIN(tga)
USE_OSGPLUGIN(dds)
USE_OSGPLUGIN(jpeg)
USE_OSGPLUGIN(bmp)
USE_OSGPLUGIN(osg)
USE_SERIALIZER_WRAPPER_LIBRARY(osg)
#endif
namespace
{
osg::ref_ptr<osg::Image> createWarningImage()
{
osg::ref_ptr<osg::Image> warningImage = new osg::Image;
int width = 8, height = 8;
warningImage->allocateImage(width, height, 1, GL_RGB, GL_UNSIGNED_BYTE);
assert(warningImage->isDataContiguous());
unsigned char* data = warningImage->data();
for (int i = 0; i < width * height; ++i)
{
data[3 * i] = (255);
data[3 * i + 1] = (0);
data[3 * i + 2] = (255);
}
return warningImage;
}
}
namespace Resource
{
ImageManager::ImageManager(const VFS::Manager* vfs, double expiryDelay)
: ResourceManager(vfs, expiryDelay)
, mWarningImage(createWarningImage())
, mOptions(new osgDB::Options("dds_flip dds_dxt1_detect_rgba ignoreTga2Fields"))
, mOptionsNoFlip(new osgDB::Options("dds_dxt1_detect_rgba ignoreTga2Fields"))
{
}
ImageManager::~ImageManager() {}
bool checkSupported(osg::Image* image)
{
switch (image->getPixelFormat())
{
case (GL_COMPRESSED_RGB_S3TC_DXT1_EXT):
case (GL_COMPRESSED_RGBA_S3TC_DXT1_EXT):
case (GL_COMPRESSED_RGBA_S3TC_DXT3_EXT):
case (GL_COMPRESSED_RGBA_S3TC_DXT5_EXT):
{
if (!SceneUtil::glExtensionsReady())
return true; // hashtag yolo (CS might not have context when loading assets)
osg::GLExtensions& exts = SceneUtil::getGLExtensions();
if (!exts.isTextureCompressionS3TCSupported
// This one works too. Should it be included in isTextureCompressionS3TCSupported()? Submitted as a
// patch to OSG.
&& !osg::isGLExtensionSupported(exts.contextID, "GL_S3_s3tc"))
{
return false;
}
break;
}
// not bothering with checks for other compression formats right now
default:
return true;
}
return true;
}
osg::ref_ptr<osg::Image> ImageManager::getImage(VFS::Path::NormalizedView path, bool disableFlip)
{
osg::ref_ptr<osg::Object> obj = mCache->getRefFromObjectCache(path);
if (obj)
return osg::ref_ptr<osg::Image>(static_cast<osg::Image*>(obj.get()));
else
{
Files::IStreamPtr stream;
try
{
stream = mVFS->get(path);
}
catch (std::exception& e)
{
Log(Debug::Error) << "Failed to open image: " << e.what();
mCache->addEntryToObjectCache(path.value(), mWarningImage);
return mWarningImage;
}
const std::string ext(Misc::getFileExtension(path.value()));
osgDB::ReaderWriter* reader = osgDB::Registry::instance()->getReaderWriterForExtension(ext);
if (!reader)
{
Log(Debug::Error) << "Error loading " << path << ": no readerwriter for '" << ext << "' found";
mCache->addEntryToObjectCache(path.value(), mWarningImage);
return mWarningImage;
}
bool killAlpha = false;
if (reader->supportedExtensions().count("tga"))
{
// Morrowind ignores the alpha channel of 16bpp TGA files even when the header says not to
unsigned char header[18];
stream->read((char*)header, 18);
if (stream->gcount() != 18)
{
Log(Debug::Error) << "Error loading " << path << ": couldn't read TGA header";
mCache->addEntryToObjectCache(path.value(), mWarningImage);
return mWarningImage;
}
int type = header[2];
int depth;
if (type == 1 || type == 9)
depth = header[7];
else
depth = header[16];
int alphaBPP = header[17] & 0x0F;
killAlpha = depth == 16 && alphaBPP == 1;
stream->seekg(0);
}
osgDB::ReaderWriter::ReadResult result
= reader->readImage(*stream, disableFlip ? mOptionsNoFlip : mOptions);
if (!result.success())
{
Log(Debug::Error) << "Error loading " << path << ": " << result.message() << " code "
<< result.status();
mCache->addEntryToObjectCache(path.value(), mWarningImage);
return mWarningImage;
}
osg::ref_ptr<osg::Image> image = result.getImage();
image->setFileName(std::string(path.value()));
if (!checkSupported(image))
{
static bool uncompress = (getenv("OPENMW_DECOMPRESS_TEXTURES") != nullptr);
if (!uncompress)
{
Log(Debug::Error) << "Error loading " << path << ": no S3TC texture compression support installed";
mCache->addEntryToObjectCache(path.value(), mWarningImage);
return mWarningImage;
}
else
{
// decompress texture in software if not supported by GPU
// requires update to getColor() to be released with OSG 3.6
osg::ref_ptr<osg::Image> newImage = new osg::Image;
newImage->setFileName(image->getFileName());
newImage->allocateImage(image->s(), image->t(), image->r(),
image->isImageTranslucent() ? GL_RGBA : GL_RGB, GL_UNSIGNED_BYTE);
for (int s = 0; s < image->s(); ++s)
for (int t = 0; t < image->t(); ++t)
for (int r = 0; r < image->r(); ++r)
newImage->setColor(image->getColor(s, t, r), s, t, r);
image = newImage;
}
}
else if (killAlpha)
{
osg::ref_ptr<osg::Image> newImage = new osg::Image;
newImage->setFileName(image->getFileName());
newImage->allocateImage(image->s(), image->t(), image->r(), GL_RGB, GL_UNSIGNED_BYTE);
// OSG just won't write the alpha as there's nowhere to put it.
for (int s = 0; s < image->s(); ++s)
for (int t = 0; t < image->t(); ++t)
for (int r = 0; r < image->r(); ++r)
newImage->setColor(image->getColor(s, t, r), s, t, r);
image = newImage;
}
mCache->addEntryToObjectCache(path.value(), image);
return image;
}
}
osg::Image* ImageManager::getWarningImage()
{
return mWarningImage;
}
void ImageManager::reportStats(unsigned int frameNumber, osg::Stats* stats) const
{
Resource::reportStats("Image", frameNumber, mCache->getStats(), *stats);
}
}
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