本文整理汇总了C++中imf::InputFile::header方法的典型用法代码示例。如果您正苦于以下问题:C++ InputFile::header方法的具体用法?C++ InputFile::header怎么用?C++ InputFile::header使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类imf::InputFile
的用法示例。
在下文中一共展示了InputFile::header方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: create
bool EXRCreator::create(const TQString &path, int, int, TQImage &img)
{
Imf::InputFile in ( path.ascii() );
const Imf::Header &h = in.header();
if ( h.hasPreviewImage() ) {
kdDebug() << "EXRcreator - using preview" << endl;
const Imf::PreviewImage &preview = in.header().previewImage();
TQImage qpreview(preview.width(), preview.height(), 32, 0, TQImage::BigEndian);
for ( unsigned int y=0; y < preview.height(); y++ ) {
for ( unsigned int x=0; x < preview.width(); x++ ) {
const Imf::PreviewRgba &q = preview.pixels()[x+(y*preview.width())];
qpreview.setPixel( x, y, tqRgba(q.r, q.g, q.b, q.a) );
}
}
img = qpreview;
return true;
} else {
// do it the hard way
// We ignore maximum size when just extracting the thumnail
// from the header, but it is very expensive to render large
// EXR images just to turn it into an icon, so we go back
// to honouring it in here.
kdDebug() << "EXRcreator - using original image" << endl;
TDEConfig * config = TDEGlobal::config();
TDEConfigGroupSaver cgs( config, "PreviewSettings" );
unsigned long long maxSize = config->readNumEntry( "MaximumSize", 1024*1024 /* 1MB */ );
unsigned long long fileSize = TQFile( path ).size();
if ( (fileSize > 0) && (fileSize < maxSize) ) {
if (!img.load( path )) {
return false;
}
if (img.depth() != 32)
img = img.convertDepth( 32 );
return true;
} else {
return false;
}
}
}
示例2:
void OpenEXRImpl :: load_channels(Imf::InputFile &file, Matrix& mat, int numChannels, const char *channelNames) {
Imath::Box2i dw = file.header().dataWindow();
int width = dw.max.x - dw.min.x + 1;
int height = dw.max.y - dw.min.y + 1;
mat.create(numChannels, Matrix::FLOAT32, width, height);
Imf::FrameBuffer frameBuffer;
for(int i=0; i < numChannels; i++) {
char c[2];
c[0] = channelNames[i];
c[1] = '\0';
frameBuffer.insert(c,
Imf::Slice(Imf::FLOAT,
(char *)(mat.data.fl + i),
sizeof(float)*numChannels,
sizeof(float)*numChannels*width));
}
file.setFrameBuffer(frameBuffer);
file.readPixels(dw.min.y, dw.max.y);
}
示例3: catch
bool
OpenEXRInput::seek_subimage (int subimage, int miplevel, ImageSpec &newspec)
{
if (subimage < 0 || subimage >= m_nsubimages) // out of range
return false;
if (subimage == m_subimage && miplevel == m_miplevel) { // no change
newspec = m_spec;
return true;
}
PartInfo &part (m_parts[subimage]);
if (! part.initialized) {
const Imf::Header *header = NULL;
#ifdef USE_OPENEXR_VERSION2
if (m_input_multipart)
header = &(m_input_multipart->header(subimage));
#else
if (m_input_tiled)
header = &(m_input_tiled->header());
if (m_input_scanline)
header = &(m_input_scanline->header());
#endif
part.parse_header (header);
part.initialized = true;
}
#ifdef USE_OPENEXR_VERSION2
if (subimage != m_subimage) {
delete m_scanline_input_part; m_scanline_input_part = NULL;
delete m_tiled_input_part; m_tiled_input_part = NULL;
delete m_deep_scanline_input_part; m_deep_scanline_input_part = NULL;
delete m_deep_tiled_input_part; m_deep_tiled_input_part = NULL;
try {
if (part.spec.deep) {
if (part.spec.tile_width)
m_deep_tiled_input_part = new Imf::DeepTiledInputPart (*m_input_multipart, subimage);
else
m_deep_scanline_input_part = new Imf::DeepScanLineInputPart (*m_input_multipart, subimage);
} else {
if (part.spec.tile_width)
m_tiled_input_part = new Imf::TiledInputPart (*m_input_multipart, subimage);
else
m_scanline_input_part = new Imf::InputPart (*m_input_multipart, subimage);
}
}
catch (const std::exception &e) {
error ("OpenEXR exception: %s", e.what());
m_scanline_input_part = NULL;
m_tiled_input_part = NULL;
m_deep_scanline_input_part = NULL;
m_deep_tiled_input_part = NULL;
ASSERT(0);
return false;
}
}
#endif
m_subimage = subimage;
if (miplevel < 0 || miplevel >= part.nmiplevels) // out of range
return false;
m_miplevel = miplevel;
m_spec = part.spec;
if (miplevel == 0 && part.levelmode == Imf::ONE_LEVEL) {
newspec = m_spec;
return true;
}
// Compute the resolution of the requested mip level.
int w = part.topwidth, h = part.topheight;
if (part.levelmode == Imf::MIPMAP_LEVELS) {
while (miplevel--) {
if (part.roundingmode == Imf::ROUND_DOWN) {
w = w / 2;
h = h / 2;
} else {
w = (w + 1) / 2;
h = (h + 1) / 2;
}
w = std::max (1, w);
h = std::max (1, h);
}
} else if (part.levelmode == Imf::RIPMAP_LEVELS) {
// FIXME
} else {
ASSERT(0);
}
m_spec.width = w;
m_spec.height = h;
// N.B. OpenEXR doesn't support data and display windows per MIPmap
// level. So always take from the top level.
Imath::Box2i datawindow = part.top_datawindow;
Imath::Box2i displaywindow = part.top_displaywindow;
m_spec.x = datawindow.min.x;
m_spec.y = datawindow.min.y;
if (m_miplevel == 0) {
//.........这里部分代码省略.........
示例4: if
bool
OpenEXRInput::open (const std::string &name, ImageSpec &newspec)
{
// Quick check to reject non-exr files
bool tiled;
if (! Imf::isOpenExrFile (name.c_str(), tiled))
return false;
m_spec = ImageSpec(); // Clear everything with default constructor
// Unless otherwise specified, exr files are assumed to be linear.
m_spec.attribute ("oiio:ColorSpace", "Linear");
try {
if (tiled) {
m_input_tiled = new Imf::TiledInputFile (name.c_str());
m_header = &(m_input_tiled->header());
} else {
m_input_scanline = new Imf::InputFile (name.c_str());
m_header = &(m_input_scanline->header());
}
}
catch (const std::exception &e) {
error ("OpenEXR exception: %s", e.what());
return false;
}
if (! m_input_scanline && ! m_input_tiled) {
error ("Unknown error opening EXR file");
return false;
}
Imath::Box2i datawindow = m_header->dataWindow();
m_spec.x = datawindow.min.x;
m_spec.y = datawindow.min.y;
m_spec.z = 0;
m_spec.width = datawindow.max.x - datawindow.min.x + 1;
m_spec.height = datawindow.max.y - datawindow.min.y + 1;
m_spec.depth = 1;
m_topwidth = m_spec.width; // Save top-level mipmap dimensions
m_topheight = m_spec.height;
Imath::Box2i displaywindow = m_header->displayWindow();
m_spec.full_x = displaywindow.min.x;
m_spec.full_y = displaywindow.min.y;
m_spec.full_z = 0;
m_spec.full_width = displaywindow.max.x - displaywindow.min.x + 1;
m_spec.full_height = displaywindow.max.y - displaywindow.min.y + 1;
m_spec.full_depth = 1;
if (tiled) {
m_spec.tile_width = m_input_tiled->tileXSize();
m_spec.tile_height = m_input_tiled->tileYSize();
} else {
m_spec.tile_width = 0;
m_spec.tile_height = 0;
}
m_spec.tile_depth = 1;
query_channels (); // also sets format
m_nsubimages = 1;
if (tiled) {
// FIXME: levelmode
m_levelmode = m_input_tiled->levelMode();
m_roundingmode = m_input_tiled->levelRoundingMode();
if (m_levelmode == Imf::MIPMAP_LEVELS) {
m_nmiplevels = m_input_tiled->numLevels();
m_spec.attribute ("openexr:roundingmode", m_roundingmode);
} else if (m_levelmode == Imf::RIPMAP_LEVELS) {
m_nmiplevels = std::max (m_input_tiled->numXLevels(),
m_input_tiled->numYLevels());
m_spec.attribute ("openexr:roundingmode", m_roundingmode);
} else {
m_nmiplevels = 1;
}
} else {
m_levelmode = Imf::ONE_LEVEL;
m_nmiplevels = 1;
}
const Imf::EnvmapAttribute *envmap;
envmap = m_header->findTypedAttribute<Imf::EnvmapAttribute>("envmap");
if (envmap) {
m_cubeface = (envmap->value() == Imf::ENVMAP_CUBE);
m_spec.attribute ("textureformat", m_cubeface ? "CubeFace Environment" : "LatLong Environment");
// OpenEXR conventions for env maps
if (! m_cubeface)
m_spec.attribute ("oiio:updirection", "y");
m_spec.attribute ("oiio:sampleborder", 1);
// FIXME - detect CubeFace Shadow?
} else {
m_cubeface = false;
if (tiled && m_levelmode == Imf::MIPMAP_LEVELS)
m_spec.attribute ("textureformat", "Plain Texture");
// FIXME - detect Shadow
}
const Imf::CompressionAttribute *compressattr;
compressattr = m_header->findTypedAttribute<Imf::CompressionAttribute>("compression");
if (compressattr) {
const char *comp = NULL;
switch (compressattr->value()) {
case Imf::NO_COMPRESSION : comp = "none"; break;
//.........这里部分代码省略.........