From c66249b79aa9bfa0924494adcd5345b5b1244b0c Mon Sep 17 00:00:00 2001 From: tpearson Date: Wed, 10 Feb 2010 01:02:50 +0000 Subject: Added old abandoned KDE3 version of gwenview git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/gwenview@1088034 283d02a7-25f6-0310-bc7c-ecb5cbfe19da --- src/gvcore/qxcfi.h | 332 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 332 insertions(+) create mode 100644 src/gvcore/qxcfi.h (limited to 'src/gvcore/qxcfi.h') diff --git a/src/gvcore/qxcfi.h b/src/gvcore/qxcfi.h new file mode 100644 index 0000000..ac82173 --- /dev/null +++ b/src/gvcore/qxcfi.h @@ -0,0 +1,332 @@ +#ifndef QXCFI_H +#define QXCFI_H + +#include +#include +#include +#include + +#include "gimp.h" +namespace Gwenview { + +// Safe readBlock helper functions +class SafeDataStream { +public: + SafeDataStream(QIODevice* device) + : mDevice(device), mFailed(false) {} + + bool failed() const { return mFailed; } + QIODevice* device() const { return mDevice; } + + SafeDataStream& readRawBytes(char* data, uint length) { + if (mFailed) return *this; + int read_length=mDevice->readBlock(data, length); + if (read_length==-1) mFailed=true; + if ((uint)read_length!=length) mFailed=true; + return *this; + } + + SafeDataStream& operator>>(Q_INT8& value) { + return readRawBytes((char*)&value, 1); + } + + SafeDataStream& operator>>(Q_UINT32& value) { + if (mFailed) return *this; + uchar *p = (uchar *)(&value); + char b[4]; + if (mDevice->readBlock( b, 4 )==4) { + *p++ = b[3]; + *p++ = b[2]; + *p++ = b[1]; + *p = b[0]; + } else { + mFailed=true; + } + return *this; + } + + SafeDataStream& operator>>(Q_INT32& value) { + return *this >>((Q_UINT32&)value); + } + + SafeDataStream& operator>>(float& value) { + return *this >>((Q_UINT32&)value); + } + + SafeDataStream& operator>>(char*& value) { + if (mFailed) return *this; + + Q_UINT32 len; + *this >> len; + if (mFailed) return *this; + if ( len == 0 ) { + value = 0; + return *this; + } + if (mDevice->atEnd() ) { + value = 0; + mFailed=true; + return *this; + } + value = new char[len]; + Q_CHECK_PTR( value ); + if ( !value ) { + mFailed=true; + return *this; + } + return readRawBytes(value, len); + } + + SafeDataStream& readBytes(char*& data, uint& len) { + if (mFailed) return *this; + + *this >> len; + if (mFailed) return *this; + data=new char[len]; + Q_CHECK_PTR( data ); + if ( !data ) { + mFailed=true; + return *this; + } + return readRawBytes(data, len); + } + + // This method is usefull to debug with gdb. Do not inline it! + int at() const; + +private: + QIODevice* mDevice; + bool mFailed; +}; + +//! Plug-in for loading a GIMP XCF image file directly. +/*! + * This class uses the Qt 3.0 Image format plug-in loader to provide + * the ability to read The GIMP XCF image files. This plug-in will + * be dynamically loaded as needed. + */ +class XCFImageFormat : public QImageFormatPlugin { + + /*! + * Each layer in an XCF file is stored as a matrix of + * 64-pixel by 64-pixel images. The GIMP has a sophisticated + * method of handling very large images as well as implementing + * parallel processing on a tile-by-tile basis. Here, though, + * we just read them in en-masse and store them in a matrix. + */ + typedef QValueVector< QValueVector< QImage > > Tiles; + + /*! + * Each GIMP image is composed of one or more layers. A layer can + * be one of any three basic types: RGB, grayscale or indexed. With an + * optional alpha channel, there are six possible types altogether. + * + * Note: there is only ever one instance of this structure. The + * layer info is discarded after it is merged into the final QImage. + */ + struct Layer { + Q_UINT32 width; //!< Width of the layer + Q_UINT32 height; //!< Height of the layer + Q_INT32 type; //!< Type of the layer (GimpImageType) + char* name; //!< Name of the layer + Q_UINT32 hierarchy_offset; //!< File position of Tile hierarchy + Q_UINT32 mask_offset; //!< File position of mask image + + uint nrows; //!< Number of rows of tiles (y direction) + uint ncols; //!< Number of columns of tiles (x direction) + + Tiles image_tiles; //!< The basic image + //! For Grayscale and Indexed images, the alpha channel is stored + //! separately (in this data structure, anyway). + Tiles alpha_tiles; + Tiles mask_tiles; //!< The layer mask (optional) + + //! Additional information about a layer mask. + struct { + Q_UINT32 opacity; + Q_UINT32 visible; + Q_UINT32 show_masked; + uchar red, green, blue; + Q_UINT32 tattoo; + } mask_channel; + + bool active; //!< Is this layer the active layer? + Q_UINT32 opacity; //!< The opacity of the layer + Q_UINT32 visible; //!< Is the layer visible? + Q_UINT32 linked; //!< Is this layer linked (geometrically) + Q_UINT32 preserve_transparency; //!< Preserve alpha when drawing on layer? + Q_UINT32 apply_mask; //!< Apply the layer mask? + Q_UINT32 edit_mask; //!< Is the layer mask the being edited? + Q_UINT32 show_mask; //!< Show the layer mask rather than the image? + Q_INT32 x_offset; //!< x offset of the layer relative to the image + Q_INT32 y_offset; //!< y offset of the layer relative to the image + Q_UINT32 mode; //!< Combining mode of layer (LayerModeEffects) + Q_UINT32 tattoo; //!< (unique identifier?) + + //! As each tile is read from the file, it is buffered here. + uchar tile[TILE_WIDTH * TILE_HEIGHT * sizeof(QRgb)]; + + //! The data from tile buffer is copied to the Tile by this + //! method. Depending on the type of the tile (RGB, Grayscale, + //! Indexed) and use (image or mask), the bytes in the buffer are + //! copied in different ways. + void (*assignBytes)( Layer& layer, uint i, uint j ); + + //! Construct a layer. + Layer ( void ) : name( 0 ) {} + //! Destruct the layer. + ~Layer ( void ) { if ( name != 0 ) delete[] name; } + }; + + /*! + * The in-memory representation of the XCF Image. It contains a few + * metadata items, but is mostly a container for the layer information. + */ + struct XCFImage { + Q_UINT32 width; //!< width of the XCF image + Q_UINT32 height; //!< height of the XCF image + Q_INT32 type; //!< type of the XCF image (GimpImageBaseType) + + Q_UINT8 compression; //!< tile compression method (CompressionType) + float x_resolution; //!< x resolution in dots per inch + float y_resolution; //!< y resolution in dots per inch + Q_INT32 tattoo; //!< (unique identifier?) + Q_UINT32 unit; //!< Units of The GIMP (inch, mm, pica, etc...) + Q_INT32 num_colors; //!< number of colors in an indexed image + QValueVector< QRgb > palette; //!< indexed image color palette + + int num_layers; //!< number of layers + Layer layer; //!< most recently read layer + + bool initialized; //!< Is the QImage initialized? + QImage image; //!< final QImage + + //! Simple constructor. + XCFImage ( void ) : initialized( false ) {} + }; + + //! The bottom-most layer is copied into the final QImage by this + //! routine. + typedef void (*PixelCopyOperation) ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + + //! Higher layers are merged into the the final QImage by this routine. + typedef void (*PixelMergeOperation) ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + + //! In layer DISSOLVE mode, a random number is chosen to compare to a + //! pixel's alpha. If the alpha is greater than the random number, the + //! pixel is drawn. This table merely contains the random number seeds + //! for each ROW of an image. Therefore, the random numbers chosen + //! are consistent from run to run. + + static int random_table[RANDOM_TABLE_SIZE]; + + //! This table provides the add_pixel saturation values (i.e. 250 + 250 = 255). + + static int add_lut[256][256]; + + //! Layer mode static data. + typedef struct { + bool affect_alpha; //!< Does this mode affect the source alpha? + } LayerModes; + + //! Array of layer mode structures for the modes described by + //! LayerModeEffects. + static LayerModes layer_modes[]; + +public: + /*! + * The constructor for the XCF image loader. This initializes the + * tables used in the layer merging routines. + */ + XCFImageFormat (); + + + /*! + * The image loader makes no (direct) use of dynamic memory + * and the Qt infrastructure takes care of constructing and destructing + * the loader so there is not much to do here. + */ + ~XCFImageFormat () {} + + /*! + * You can query Qt about the types of image file formats it knows about + * via QImage::inputFormats or QImage::inputFormatList(). + * This method returns "xcf". + */ + QStringList keys () const { + return QStringList() << "XCF"; + } + + /*! + * This method installs the XCF reader on demand. + */ + bool installIOHandler ( const QString& ); + + static void registerFormat(); + +private: + static void readXCF ( QImageIO* image_io ); +#ifdef TMP_WRITE + static void writeXCF ( QImageIO* ) {} +#endif + static void initializeImage ( XCFImage& xcf_image ); + static void composeTiles ( XCFImage& xcf_image ); + static bool loadImageProperties ( SafeDataStream& xcf_io, XCFImage& image ); + static bool loadLayer ( SafeDataStream& xcf_io, XCFImage& xcf_image ); + static bool loadLayerProperties ( SafeDataStream& xcf_io, Layer& layer ); + static bool loadChannelProperties ( SafeDataStream& xcf_io, Layer& layer ); + static bool loadHierarchy ( SafeDataStream& xcf_io, Layer& layer ); + static bool loadMask ( SafeDataStream& xcf_io, Layer& layer ); + static bool loadLevel ( SafeDataStream& xcf_io, Layer& layer, Q_INT32 bpp ); + static bool loadTileRLE ( SafeDataStream& xcf_io, uchar* tile, int size, + int data_length, Q_INT32 bpp ); + static bool loadProperty ( SafeDataStream& xcf_io, PropType& type, + QByteArray& bytes ); + static void setGrayPalette ( QImage& image ); + static void setPalette ( XCFImage& xcf_image, QImage& image ); + static void assignImageBytes ( Layer& layer, uint i, uint j ); + static void assignMaskBytes ( Layer& layer, uint i, uint j ); + + static void copyLayerToImage ( XCFImage& xcf_image ); + static void copyRGBToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void copyGrayToGray ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void copyGrayToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void copyGrayAToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void copyIndexedToIndexed ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void copyIndexedAToIndexed ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void copyIndexedAToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + + static void mergeLayerIntoImage ( XCFImage& xcf_image ); + static void mergeRGBToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeGrayToGray ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeGrayAToGray ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeGrayToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeGrayAToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeIndexedToIndexed ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeIndexedAToIndexed ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + static void mergeIndexedAToRGB ( Layer& layer, uint i, uint j, int k, int l, + QImage& image, int m, int n ); + + static void dissolveRGBPixels ( QImage& image, int x, int y ); + static void dissolveAlphaPixels ( QImage& image, int x, int y ); +}; + +} // namespace +#endif + -- cgit v1.2.1