Texture::Texture(const std::string &raw, unsigned int width, unsigned int height) : width(width), height(height) {
framebuffer.reserve(width * height * sizeof(Pixel));
// Open file stream
std::ifstream image_stream(raw, std::ios::binary);
if (!image_stream.is_open())
std::cerr << "Could not open texture " << raw << std::endl;
// Load the
image_stream.read((char *)framebuffer.data(), framebuffer.capacity()*sizeof(Pixel));
image_stream.close();
initGL();
Update();
}
ReadResult readImageStream(const std::string &filename, const osgDB::ReaderWriter::Options *options) const
{
OSG_INFO << "ReaderWriterDirectShow::readImage " << filename << std::endl;
const std::string path = osgDB::containsServerAddress(filename) ?
filename :
osgDB::findDataFile(filename, options);
osg::ref_ptr<DirectShowImageStream> image_stream(new DirectShowImageStream);
if (path.empty()) // try with capture
{
std::map<std::string, std::string> map;
if (options)
{
map["captureWantedWidth"] = options->getPluginStringData("captureWantedWidth");
map["captureWantedHeight"] = options->getPluginStringData("captureWantedHeight");
map["captureWantedFps"] = options->getPluginStringData("captureWantedFps");
map["captureVideoDevice"] = options->getPluginStringData("captureVideoDevice");
map["captureSoundDevice"] = options->getPluginStringData("captureSoundDevice");
map["captureSoundDeviceNbChannels"] = options->getPluginStringData("captureSoundDeviceNbChannels");
}
if (filename != "capture")
{
if (!options || (options && options->getPluginStringData("captureVideoDevice").empty()))
map["captureVideoDevice"] = filename;
}
image_stream->setOptions(map);
if (!image_stream->openCaptureDevices())
return ReadResult::FILE_NOT_HANDLED;
return image_stream.release();
}
if (!image_stream->openFile(filename))
return ReadResult::FILE_NOT_HANDLED;
return image_stream.release();
}
// Load a new image from a raw RGB file directly into OpenGL memory
GLuint LoadImage(const std::string &image_file, unsigned int width, unsigned int height) {
// Create new texture object
GLuint texture_id;
glGenTextures(1, &texture_id);
glBindTexture(GL_TEXTURE_2D, texture_id);
// Set mipmaps
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Read raw data
std::ifstream image_stream(image_file, std::ios::binary);
// Setup buffer for pixels (r,g,b bytes), since we will not manipulate the image just keep it as char
std::vector<char> buffer(width*height*3);
image_stream.read(buffer.data(), buffer.size());
image_stream.close();
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer.data());
return texture_id;
}
