inkscape/src/sp-image.cpp

	sp-image.cpp revision 78023b76d7395f1b2dc1c64e1e7ad538be13c62c
#define __SP_IMAGE_C__

/*
 * SVG <image> implementation
 *
 * Authors:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *   Edward Flick (EAF)
 *
 * Copyright (C) 1999-2005 Authors
 * Copyright (C) 2000-2001 Ximian, Inc.
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <libnr/nr-matrix-fns.h>

//#define GDK_PIXBUF_ENABLE_BACKEND 1
//#include <gdk-pixbuf/gdk-pixbuf-io.h>
#include "display/nr-arena-image.h"

//Added for preserveAspectRatio support -- EAF
#include "enums.h"
#include "attributes.h"

#include "print.h"
#include "brokenimage.xpm"
#include "document.h"
#include "sp-image.h"
#include <glibmm/i18n.h>
#include "xml/quote.h"
#include <xml/repr.h>

#include "io/sys.h"
#include <png.h>
#if ENABLE_LCMS
#include "color-profile-fns.h"
#include "color-profile.h"
//#define DEBUG_LCMS
#ifdef DEBUG_LCMS
#include "prefs-utils.h"
#include <gtk/gtkmessagedialog.h>
#endif // DEBUG_LCMS
#endif // ENABLE_LCMS
/*
 * SPImage
 */


static void sp_image_class_init (SPImageClass * klass);
static void sp_image_init (SPImage * image);

static void sp_image_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
static void sp_image_release (SPObject * object);
static void sp_image_set (SPObject *object, unsigned int key, const gchar *value);
static void sp_image_update (SPObject *object, SPCtx *ctx, unsigned int flags);
static Inkscape::XML::Node *sp_image_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);

static void sp_image_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
static void sp_image_print (SPItem * item, SPPrintContext *ctx);
static gchar * sp_image_description (SPItem * item);
static void sp_image_snappoints(SPItem const *item, SnapPointsIter p);
static NRArenaItem *sp_image_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
static NR::Matrix sp_image_set_transform (SPItem *item, NR::Matrix const &xform);

GdkPixbuf * sp_image_repr_read_image (Inkscape::XML::Node * repr);
static GdkPixbuf *sp_image_pixbuf_force_rgba (GdkPixbuf * pixbuf);
static void sp_image_update_canvas_image (SPImage *image);
static GdkPixbuf * sp_image_repr_read_dataURI (const gchar * uri_data);
static GdkPixbuf * sp_image_repr_read_b64 (const gchar * uri_data);

static SPItemClass *parent_class;


extern "C"
{
    void user_read_data( png_structp png_ptr, png_bytep data, png_size_t length );
    void user_write_data( png_structp png_ptr, png_bytep data, png_size_t length );
    void user_flush_data( png_structp png_ptr );

}


#ifdef DEBUG_LCMS
extern guint update_in_progress;
#define DEBUG_MESSAGE(key, ...) \
{\
    gint dump = prefs_get_int_attribute_limited("options.scislac", #key, 0, 0, 1);\
    gint dumpD = prefs_get_int_attribute_limited("options.scislac", #key"D", 0, 0, 1);\
    gint dumpD2 = prefs_get_int_attribute_limited("options.scislac", #key"D2", 0, 0, 1);\
    dumpD &= ( (update_in_progress == 0) || dumpD2 );\
    if ( dump )\
    {\
        g_message( __VA_ARGS__ );\
\
    }\
    if ( dumpD )\
    {\
        GtkWidget *dialog = gtk_message_dialog_new(NULL,\
                                                   GTK_DIALOG_DESTROY_WITH_PARENT, \
                                                   GTK_MESSAGE_INFO,    \
                                                   GTK_BUTTONS_OK,      \
                                                   __VA_ARGS__          \
                                                   );\
        g_signal_connect_swapped(dialog, "response",\
                                 G_CALLBACK(gtk_widget_destroy),        \
                                 dialog);                               \
        gtk_widget_show_all( dialog );\
    }\
}
#endif // DEBUG_LCMS

namespace Inkscape {
namespace IO {

class PushPull
{
public:
    gboolean    first;
    FILE*       fp;
    guchar*     scratch;
    gsize       size;
    gsize       used;
    gsize       offset;
    GdkPixbufLoader *loader;

    PushPull() : first(TRUE),
                 fp(0),
                 scratch(0),
                 size(0),
                 used(0),
                 offset(0),
                 loader(0) {};

    gboolean readMore()
    {
        gboolean good = FALSE;
        if ( offset )
        {
            g_memmove( scratch, scratch + offset, used - offset );
            used -= offset;
            offset = 0;
        }
        if ( used < size )
        {
            gsize space = size - used;
            gsize got = fread( scratch + used, 1, space, fp );
            if ( got )
            {
                if ( loader )
                {
                    GError *err = NULL;
                    //g_message( " __read %d bytes", (int)got );
                    if ( !gdk_pixbuf_loader_write( loader, scratch + used, got, &err ) )
                    {
                        //g_message("_error writing pixbuf data");
                    }
                }

                used += got;
                good = TRUE;
            }
            else
            {
                good = FALSE;
            }
        }
        return good;
    }

    gsize available() const
    {
        return (used - offset);
    }

    gsize readOut( gpointer data, gsize length )
    {
        gsize giving = available();
        if ( length < giving )
        {
            giving = length;
        }
        g_memmove( data, scratch + offset, giving );
        offset += giving;
        if ( offset >= used )
        {
            offset = 0;
            used = 0;
        }
        return giving;
    }

    void clear()
    {
        offset = 0;
        used = 0;
    }

private:
    PushPull& operator = (const PushPull& other);
    PushPull(const PushPull& other);
};

void user_read_data( png_structp png_ptr, png_bytep data, png_size_t length )
{
//    g_message( "user_read_data(%d)", length );

    PushPull* youme = (PushPull*)png_get_io_ptr(png_ptr);

    gsize filled = 0;
    gboolean canRead = TRUE;

    while ( filled < length && canRead )
    {
        gsize some = youme->readOut( data + filled, length - filled );
        filled += some;
        if ( filled < length )
        {
            canRead &= youme->readMore();
        }
    }
//    g_message("things out");
}

void user_write_data( png_structp png_ptr, png_bytep data, png_size_t length )
{
    //g_message( "user_write_data(%d)", length );
}

void user_flush_data( png_structp png_ptr )
{
    //g_message( "user_flush_data" );
}

GdkPixbuf*  pixbuf_new_from_file( const char *filename, GError **error )
{
    GdkPixbuf* buf = NULL;
    PushPull youme;
    gint dpiX = 0;
    gint dpiY = 0;

    //buf = gdk_pixbuf_new_from_file( filename, error );
    dump_fopen_call( filename, "pixbuf_new_from_file" );
    FILE* fp = fopen_utf8name( filename, "r" );
    if ( fp )
    {
        GdkPixbufLoader *loader = gdk_pixbuf_loader_new();
        if ( loader )
        {
            GError *err = NULL;

            // short buffer
            guchar scratch[1024];
            gboolean latter = FALSE;
            gboolean isPng = FALSE;
            png_structp pngPtr = NULL;
            png_infop infoPtr = NULL;
            //png_infop endPtr = NULL;

            youme.fp = fp;
            youme.scratch = scratch;
            youme.size = sizeof(scratch);
            youme.used = 0;
            youme.offset = 0;
            youme.loader = loader;

            while ( !feof(fp) )
            {
                if ( youme.readMore() )
                {
                    if ( youme.first )
                    {
                        //g_message( "First data chunk" );
                        youme.first = FALSE;
                        isPng = !png_sig_cmp( scratch + youme.offset, 0, youme.available() );
                        //g_message( "  png? %s", (isPng ? "Yes":"No") );
                        if ( isPng )
                        {
                            pngPtr = png_create_read_struct( PNG_LIBPNG_VER_STRING,
                                                             NULL,//(png_voidp)user_error_ptr,
                                                             NULL,//user_error_fn,
                                                             NULL//user_warning_fn
                                );
                            if ( pngPtr )
                            {
                                infoPtr = png_create_info_struct( pngPtr );
                                //endPtr = png_create_info_struct( pngPtr );

                                png_set_read_fn( pngPtr, &youme, user_read_data );
                                //g_message( "In" );

                                //png_read_info( pngPtr, infoPtr );
                                png_read_png( pngPtr, infoPtr, PNG_TRANSFORM_IDENTITY, NULL );

                                //g_message("out");

                                //png_read_end(pngPtr, endPtr);

                                /*
                                if ( png_get_valid( pngPtr, infoPtr, PNG_INFO_pHYs ) )
                                {
                                    g_message("pHYs chunk now valid" );
                                }
                                if ( png_get_valid( pngPtr, infoPtr, PNG_INFO_sCAL ) )
                                {
                                    g_message("sCAL chunk now valid" );
                                }
                                */

                                png_uint_32 res_x = 0;
                                png_uint_32 res_y = 0;
                                int unit_type = 0;
                                if ( png_get_pHYs( pngPtr, infoPtr, &res_x, &res_y, &unit_type) )
                                {
//                                     g_message( "pHYs yes (%d, %d) %d (%s)", (int)res_x, (int)res_y, unit_type,
//                                                (unit_type == 1? "per meter" : "unknown")
//                                         );

//                                     g_message( "    dpi: (%d, %d)",
//                                                (int)(0.5 + ((double)res_x)/39.37),
//                                                (int)(0.5 + ((double)res_y)/39.37) );
                                    if ( unit_type == PNG_RESOLUTION_METER )
                                    {
                                        // TODO come up with a more accurate DPI setting
                                        dpiX = (int)(0.5 + ((double)res_x)/39.37);
                                        dpiY = (int)(0.5 + ((double)res_y)/39.37);
                                    }
                                }
                                else
                                {
//                                     g_message( "pHYs no" );
                                }

/*
                                double width = 0;
                                double height = 0;
                                int unit = 0;
                                if ( png_get_sCAL(pngPtr, infoPtr, &unit, &width, &height) )
                                {
                                    gchar* vals[] = {
                                        "unknown", // PNG_SCALE_UNKNOWN
                                        "meter", // PNG_SCALE_METER
                                        "radian", // PNG_SCALE_RADIAN
                                        "last", //
                                        NULL
                                    };

                                    g_message( "sCAL: (%f, %f) %d (%s)",
                                               width, height, unit,
                                               ((unit >= 0 && unit < 3) ? vals[unit]:"???")
                                        );
                                }
*/

                                // now clean it up.
                                png_destroy_read_struct( &pngPtr, &infoPtr, NULL );//&endPtr );
                            }
                            else
                            {
                                g_message("Error when creating PNG read struct");
                            }
                        }
                    }
                    else if ( !latter )
                    {
                        latter = TRUE;
                        //g_message("  READing latter");
                    }
                    // Now clear out the buffer so we can read more.
                    // (dumping out unused)
                    youme.clear();
                }
            }

            gboolean ok = gdk_pixbuf_loader_close(loader, &err);
            if ( ok )
            {
                buf = gdk_pixbuf_loader_get_pixbuf( loader );
                if ( buf )
                {
                    g_object_ref(buf);

                    if ( dpiX )
                    {
                        gchar *tmp = g_strdup_printf( "%d", dpiX );
                        if ( tmp )
                        {
                            //gdk_pixbuf_set_option( buf, "Inkscape::DpiX", tmp );
                            g_free( tmp );
                        }
                    }
                    if ( dpiY )
                    {
                        gchar *tmp = g_strdup_printf( "%d", dpiY );
                        if ( tmp )
                        {
                            //gdk_pixbuf_set_option( buf, "Inkscape::DpiY", tmp );
                            g_free( tmp );
                        }
                    }
                }
            }
            else
            {
                // do something
                g_message("error loading pixbuf at close");
            }

            g_object_unref(loader);
        }
        else
        {
            g_message("error when creating pixbuf loader");
        }
        fclose( fp );
        fp = NULL;
    }
    else
    {
        g_warning ("Unable to open linked file: %s", filename);
    }

/*
    if ( buf )
    {
        const gchar* bloop = gdk_pixbuf_get_option( buf, "Inkscape::DpiX" );
        if ( bloop )
        {
            g_message("DPI X is [%s]", bloop);
        }
        bloop = gdk_pixbuf_get_option( buf, "Inkscape::DpiY" );
        if ( bloop )
        {
            g_message("DPI Y is [%s]", bloop);
        }
    }
*/

    return buf;
}

}
}

GType
sp_image_get_type (void)
{
    static GType image_type = 0;
    if (!image_type) {
        GTypeInfo image_info = {
            sizeof (SPImageClass),
            NULL,   /* base_init */
            NULL,   /* base_finalize */
            (GClassInitFunc) sp_image_class_init,
            NULL,   /* class_finalize */
            NULL,   /* class_data */
            sizeof (SPImage),
            16, /* n_preallocs */
            (GInstanceInitFunc) sp_image_init,
            NULL,   /* value_table */
        };
        image_type = g_type_register_static (sp_item_get_type (), "SPImage", &image_info, (GTypeFlags)0);
    }
    return image_type;
}

static void
sp_image_class_init (SPImageClass * klass)
{
    GObjectClass * gobject_class;
    SPObjectClass * sp_object_class;
    SPItemClass * item_class;

    gobject_class = (GObjectClass *) klass;
    sp_object_class = (SPObjectClass *) klass;
    item_class = (SPItemClass *) klass;

    parent_class = (SPItemClass*)g_type_class_ref (sp_item_get_type ());

    sp_object_class->build = sp_image_build;
    sp_object_class->release = sp_image_release;
    sp_object_class->set = sp_image_set;
    sp_object_class->update = sp_image_update;
    sp_object_class->write = sp_image_write;

    item_class->bbox = sp_image_bbox;
    item_class->print = sp_image_print;
    item_class->description = sp_image_description;
    item_class->show = sp_image_show;
    item_class->snappoints = sp_image_snappoints;
    item_class->set_transform = sp_image_set_transform;
}

static void
sp_image_init (SPImage *image)
{
    image->x.unset();
    image->y.unset();
    image->width.unset();
    image->height.unset();
    image->aspect_align = SP_ASPECT_NONE;
}

static void
sp_image_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
{
    if (((SPObjectClass *) parent_class)->build)
        ((SPObjectClass *) parent_class)->build (object, document, repr);

    sp_object_read_attr (object, "xlink:href");
    sp_object_read_attr (object, "x");
    sp_object_read_attr (object, "y");
    sp_object_read_attr (object, "width");
    sp_object_read_attr (object, "height");
    sp_object_read_attr (object, "preserveAspectRatio");
    sp_object_read_attr (object, "color-profile");

    /* Register */
    sp_document_add_resource (document, "image", object);
}

static void
sp_image_release (SPObject *object)
{
    SPImage *image;

    image = SP_IMAGE (object);

    if (SP_OBJECT_DOCUMENT (object)) {
        /* Unregister ourselves */
        sp_document_remove_resource (SP_OBJECT_DOCUMENT (object), "image", SP_OBJECT (object));
    }

    if (image->href) {
        g_free (image->href);
        image->href = NULL;
    }

    if (image->pixbuf) {
        gdk_pixbuf_unref (image->pixbuf);
        image->pixbuf = NULL;
    }

#if ENABLE_LCMS
    if (image->color_profile) {
        g_free (image->color_profile);
        image->color_profile = NULL;
    }
#endif // ENABLE_LCMS

    if (((SPObjectClass *) parent_class)->release)
        ((SPObjectClass *) parent_class)->release (object);
}

static void
sp_image_set (SPObject *object, unsigned int key, const gchar *value)
{
    SPImage *image;

    image = SP_IMAGE (object);

    switch (key) {
    case SP_ATTR_XLINK_HREF:
        g_free (image->href);
        image->href = (value) ? g_strdup (value) : NULL;
        object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
        break;
    case SP_ATTR_X:
        if (!image->x.readAbsolute(value)) {
            /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
            image->x.unset();
        }
        object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
        break;
    case SP_ATTR_Y:
        if (!image->y.readAbsolute(value)) {
            /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
            image->y.unset();
        }
        object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
        break;
    case SP_ATTR_WIDTH:
        if (!image->width.readAbsolute(value)) {
            /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
            image->width.unset();
        }
        object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
        break;
    case SP_ATTR_HEIGHT:
        if (!image->height.readAbsolute(value)) {
            /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
            image->height.unset();
        }
        object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
        break;
    case SP_ATTR_PRESERVEASPECTRATIO:
        /* Do setup before, so we can use break to escape */
        image->aspect_align = SP_ASPECT_NONE;
        image->aspect_clip = SP_ASPECT_MEET;
        object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
        if (value) {
            int len;
            gchar c[256];
            const gchar *p, *e;
            unsigned int align, clip;
            p = value;
            while (*p && *p == 32) p += 1;
            if (!*p) break;
            e = p;
            while (*e && *e != 32) e += 1;
            len = e - p;
            if (len > 8) break;
            memcpy (c, value, len);
            c[len] = 0;
            /* Now the actual part */
            if (!strcmp (c, "none")) {
                align = SP_ASPECT_NONE;
            } else if (!strcmp (c, "xMinYMin")) {
                align = SP_ASPECT_XMIN_YMIN;
            } else if (!strcmp (c, "xMidYMin")) {
                align = SP_ASPECT_XMID_YMIN;
            } else if (!strcmp (c, "xMaxYMin")) {
                align = SP_ASPECT_XMAX_YMIN;
            } else if (!strcmp (c, "xMinYMid")) {
                align = SP_ASPECT_XMIN_YMID;
            } else if (!strcmp (c, "xMidYMid")) {
                align = SP_ASPECT_XMID_YMID;
            } else if (!strcmp (c, "xMaxYMid")) {
                align = SP_ASPECT_XMAX_YMID;
            } else if (!strcmp (c, "xMinYMax")) {
                align = SP_ASPECT_XMIN_YMAX;
            } else if (!strcmp (c, "xMidYMax")) {
                align = SP_ASPECT_XMID_YMAX;
            } else if (!strcmp (c, "xMaxYMax")) {
                align = SP_ASPECT_XMAX_YMAX;
            } else {
                break;
            }
            clip = SP_ASPECT_MEET;
            while (*e && *e == 32) e += 1;
            if (e) {
                if (!strcmp (e, "meet")) {
                    clip = SP_ASPECT_MEET;
                } else if (!strcmp (e, "slice")) {
                    clip = SP_ASPECT_SLICE;
                } else {
                    break;
                }
            }
            image->aspect_align = align;
            image->aspect_clip = clip;
        }
        break;
#if ENABLE_LCMS
        case SP_PROP_COLOR_PROFILE:
                if ( image->color_profile ) {
                    g_free (image->color_profile);
                }
                image->color_profile = (value) ? g_strdup (value) : NULL;
#ifdef DEBUG_LCMS
                if ( value ) {
                    DEBUG_MESSAGE( lcmsFour, "<image> color-profile set to '%s'", value );
                } else {
                    DEBUG_MESSAGE( lcmsFour, "<image> color-profile cleared" );
                }
#endif // DEBUG_LCMS
                // TODO check on this HREF_MODIFIED flag
                object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_IMAGE_HREF_MODIFIED_FLAG);
                break;
#endif // ENABLE_LCMS
    default:
        if (((SPObjectClass *) (parent_class))->set)
            ((SPObjectClass *) (parent_class))->set (object, key, value);
        break;
    }
}

static void
sp_image_update (SPObject *object, SPCtx *ctx, unsigned int flags)
{
    SPImage *image;

    image = (SPImage *) object;

    if (((SPObjectClass *) (parent_class))->update)
        ((SPObjectClass *) (parent_class))->update (object, ctx, flags);

    if (flags & SP_IMAGE_HREF_MODIFIED_FLAG) {
        if (image->pixbuf) {
            gdk_pixbuf_unref (image->pixbuf);
            image->pixbuf = NULL;
        }
        if (image->href) {
            GdkPixbuf *pixbuf;
            pixbuf = sp_image_repr_read_image (object->repr);
            if (pixbuf) {
                pixbuf = sp_image_pixbuf_force_rgba (pixbuf);
// BLIP
#if ENABLE_LCMS
                                if ( image->color_profile )
                                {
                                    int imagewidth = gdk_pixbuf_get_width( pixbuf );
                                    int imageheight = gdk_pixbuf_get_height( pixbuf );
                                    int rowstride = gdk_pixbuf_get_rowstride( pixbuf );
                                    guchar* px = gdk_pixbuf_get_pixels( pixbuf );

                                    if ( px ) {
#ifdef DEBUG_LCMS
                                        DEBUG_MESSAGE( lcmsFive, "in <image>'s sp_image_update. About to call colorprofile_get_handle()" );
#endif // DEBUG_LCMS
                                        guint profIntent = Inkscape::RENDERING_INTENT_UNKNOWN;
                                        cmsHPROFILE prof = Inkscape::colorprofile_get_handle( SP_OBJECT_DOCUMENT( object ),
                                                                                              &profIntent,
                                                                                              image->color_profile );
                                        if ( prof ) {
                                            icProfileClassSignature profileClass = cmsGetDeviceClass( prof );
                                            if ( profileClass != icSigNamedColorClass ) {
                                                int intent = INTENT_PERCEPTUAL;
                                                switch ( profIntent ) {
                                                    case Inkscape::RENDERING_INTENT_RELATIVE_COLORIMETRIC:
                                                        intent = INTENT_RELATIVE_COLORIMETRIC;
                                                        break;
                                                    case Inkscape::RENDERING_INTENT_SATURATION:
                                                        intent = INTENT_SATURATION;
                                                        break;
                                                    case Inkscape::RENDERING_INTENT_ABSOLUTE_COLORIMETRIC:
                                                        intent = INTENT_ABSOLUTE_COLORIMETRIC;
                                                        break;
                                                    case Inkscape::RENDERING_INTENT_PERCEPTUAL:
                                                    case Inkscape::RENDERING_INTENT_UNKNOWN:
                                                    case Inkscape::RENDERING_INTENT_AUTO:
                                                    default:
                                                        intent = INTENT_PERCEPTUAL;
                                                }
                                                cmsHPROFILE destProf = cmsCreate_sRGBProfile();
                                                cmsHTRANSFORM transf = cmsCreateTransform( prof,
                                                                                           TYPE_RGBA_8,
                                                                                           destProf,
                                                                                           TYPE_RGBA_8,
                                                                                           intent, 0 );
                                                if ( transf ) {
                                                    guchar* currLine = px;
                                                    for ( int y = 0; y < imageheight; y++ ) {
                                                        // Since the types are the same size, we can do the transformation in-place
                                                        cmsDoTransform( transf, currLine, currLine, imagewidth );
                                                        currLine += rowstride;
                                                    }

                                                    cmsDeleteTransform( transf );
                                                }
#ifdef DEBUG_LCMS
                                                else
                                                {
                                                    DEBUG_MESSAGE( lcmsSix, "in <image>'s sp_image_update. Unable to create LCMS transform." );
                                                }
#endif // DEBUG_LCMS
                                                cmsCloseProfile( destProf );
                                            }
#ifdef DEBUG_LCMS
                                            else
                                            {
                                                DEBUG_MESSAGE( lcmsSeven, "in <image>'s sp_image_update. Profile type is named color. Can't transform." );
                                            }
#endif // DEBUG_LCMS
                                        }
#ifdef DEBUG_LCMS
                                        else
                                        {
                                            DEBUG_MESSAGE( lcmsEight, "in <image>'s sp_image_update. No profile found." );
                                        }
#endif // DEBUG_LCMS
                                    }
                                }
#endif // ENABLE_LCMS
                image->pixbuf = pixbuf;
            }
        }
    }
    // preserveAspectRatio calculate bounds / clipping rectangle -- EAF
    if (image->pixbuf && (image->aspect_align != SP_ASPECT_NONE)) {
                int imagewidth, imageheight;
            double x,y;

                imagewidth = gdk_pixbuf_get_width (image->pixbuf);
                imageheight = gdk_pixbuf_get_height (image->pixbuf);

            switch (image->aspect_align) {
            case SP_ASPECT_XMIN_YMIN:
                x = 0.0;
                y = 0.0;
                break;
            case SP_ASPECT_XMID_YMIN:
                x = 0.5;
                y = 0.0;
                break;
            case SP_ASPECT_XMAX_YMIN:
                x = 1.0;
                y = 0.0;
                break;
            case SP_ASPECT_XMIN_YMID:
                x = 0.0;
                y = 0.5;
                break;
            case SP_ASPECT_XMID_YMID:
                x = 0.5;
                y = 0.5;
                break;
            case SP_ASPECT_XMAX_YMID:
                x = 1.0;
                y = 0.5;
                break;
            case SP_ASPECT_XMIN_YMAX:
                x = 0.0;
                y = 1.0;
                break;
            case SP_ASPECT_XMID_YMAX:
                x = 0.5;
                y = 1.0;
                break;
            case SP_ASPECT_XMAX_YMAX:
                x = 1.0;
                y = 1.0;
                break;
            default:
                x = 0.0;
                y = 0.0;
                break;
            }

            if (image->aspect_clip == SP_ASPECT_SLICE) {
                image->viewx = image->x.computed;
                image->viewy = image->y.computed;
                image->viewwidth = image->width.computed;
                image->viewheight = image->height.computed;
                if ((imagewidth*image->height.computed)>(image->width.computed*imageheight)) {
                    // Pixels aspect is wider than bounding box
                    image->trimheight = imageheight;
                    image->trimwidth = static_cast<int>(static_cast<double>(imageheight) * image->width.computed / image->height.computed);
                    image->trimy = 0;
                    image->trimx = static_cast<int>(static_cast<double>(imagewidth - image->trimwidth) * x);
                } else {
                    // Pixels aspect is taller than bounding box
                    image->trimwidth = imagewidth;
                    image->trimheight = static_cast<int>(static_cast<double>(imagewidth) * image->height.computed / image->width.computed);
                    image->trimx = 0;
                    image->trimy = static_cast<int>(static_cast<double>(imageheight - image->trimheight) * y);
                }
            } else {
                // Otherwise, assume SP_ASPECT_MEET
                image->trimx = 0;
                image->trimy = 0;
                image->trimwidth = imagewidth;
                image->trimheight = imageheight;
                if ((imagewidth*image->height.computed)>(image->width.computed*imageheight)) {
                    // Pixels aspect is wider than bounding boz
                    image->viewwidth = image->width.computed;
                    image->viewheight = image->viewwidth * imageheight / imagewidth;
                    image->viewx=image->x.computed;
                    image->viewy=(image->height.computed - image->viewheight) * y + image->y.computed;
                } else {
                    // Pixels aspect is taller than bounding box
                    image->viewheight = image->height.computed;
                    image->viewwidth = image->viewheight * imagewidth / imageheight;
                    image->viewy=image->y.computed;
                    image->viewx=(image->width.computed - image->viewwidth) * x + image->x.computed;
                }
            }
    }

    sp_image_update_canvas_image ((SPImage *) object);
}

static Inkscape::XML::Node *
sp_image_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
{
    SPImage *image;

    image = SP_IMAGE (object);

    if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
        repr = sp_repr_new ("svg:image");
    }

    repr->setAttribute("xlink:href", image->href);
    /* fixme: Reset attribute if needed (Lauris) */
    if (image->x._set) sp_repr_set_svg_double(repr, "x", image->x.computed);
    if (image->y._set) sp_repr_set_svg_double(repr, "y", image->y.computed);
    if (image->width._set) sp_repr_set_svg_double(repr, "width", image->width.computed);
    if (image->height._set) sp_repr_set_svg_double(repr, "height", image->height.computed);
    repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
#if ENABLE_LCMS
        if (image->color_profile) repr->setAttribute("color-profile", image->color_profile);
#endif // ENABLE_LCMS

    if (((SPObjectClass *) (parent_class))->write)
        ((SPObjectClass *) (parent_class))->write (object, repr, flags);

    return repr;
}

static void
sp_image_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags)
{
    SPImage const &image = *SP_IMAGE(item);

    if ((image.width.computed > 0.0) && (image.height.computed > 0.0)) {
        double const x0 = image.x.computed;
        double const y0 = image.y.computed;
        double const x1 = x0 + image.width.computed;
        double const y1 = y0 + image.height.computed;

        nr_rect_union_pt(bbox, NR::Point(x0, y0) * transform);
        nr_rect_union_pt(bbox, NR::Point(x1, y0) * transform);
        nr_rect_union_pt(bbox, NR::Point(x1, y1) * transform);
        nr_rect_union_pt(bbox, NR::Point(x0, y1) * transform);
    }
}

static void
sp_image_print (SPItem *item, SPPrintContext *ctx)
{
    SPImage *image;
    NRMatrix tp, ti, s, t;
    guchar *px;
    int w, h, rs, pixskip;

    image = SP_IMAGE (item);

    if (!image->pixbuf) return;
    if ((image->width.computed <= 0.0) || (image->height.computed <= 0.0)) return;

    px = gdk_pixbuf_get_pixels (image->pixbuf);
    w = gdk_pixbuf_get_width (image->pixbuf);
    h = gdk_pixbuf_get_height (image->pixbuf);
    rs = gdk_pixbuf_get_rowstride (image->pixbuf);
    pixskip = gdk_pixbuf_get_n_channels (image->pixbuf) * gdk_pixbuf_get_bits_per_sample (image->pixbuf) / 8;

    if (image->aspect_align == SP_ASPECT_NONE) {
        /* fixme: (Lauris) */
        nr_matrix_set_translate (&tp, image->x.computed, image->y.computed);
        nr_matrix_set_scale (&s, image->width.computed, -image->height.computed);
        nr_matrix_set_translate (&ti, 0.0, -1.0);
    } else { // preserveAspectRatio
        nr_matrix_set_translate (&tp, image->viewx, image->viewy);
        nr_matrix_set_scale (&s, image->viewwidth, -image->viewheight);
        nr_matrix_set_translate (&ti, 0.0, -1.0);
    }

    nr_matrix_multiply (&t, &s, &tp);
    nr_matrix_multiply (&t, &ti, &t);

    if (image->aspect_align == SP_ASPECT_NONE)
        sp_print_image_R8G8B8A8_N (ctx, px, w, h, rs, &t, SP_OBJECT_STYLE (item));
    else // preserveAspectRatio
        sp_print_image_R8G8B8A8_N (ctx, px + image->trimx*pixskip + image->trimy*rs, image->trimwidth, image->trimheight, rs, &t, SP_OBJECT_STYLE (item));
}

static gchar *
sp_image_description(SPItem *item)
{
    SPImage *image = SP_IMAGE(item);
    char *href_desc;
        if (image->href) {
            href_desc = (strncmp(image->href, "data:", 5) == 0)
                ? g_strdup(_("embedded"))
                : xml_quote_strdup(image->href);
        } else {
            g_warning("Attempting to call strncmp() with a null pointer.");
            href_desc = g_strdup("(null_pointer)"); // we call g_free() on href_desc
        }

    char *ret = ( image->pixbuf == NULL
              ? g_strdup_printf(_("<b>Image with bad reference</b>: %s"), href_desc)
              : g_strdup_printf(_("<b>Image</b> %d &#215; %d: %s"),
                    gdk_pixbuf_get_width(image->pixbuf),
                    gdk_pixbuf_get_height(image->pixbuf),
                    href_desc) );
    g_free(href_desc);
    return ret;
}

static NRArenaItem *
sp_image_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags)
{
    int pixskip, rs;
    SPImage * image;
    NRArenaItem *ai;

    image = (SPImage *) item;

    ai = NRArenaImage::create(arena);

    if (image->pixbuf) {
            pixskip = gdk_pixbuf_get_n_channels (image->pixbuf) * gdk_pixbuf_get_bits_per_sample (image->pixbuf) / 8;
        rs = gdk_pixbuf_get_rowstride (image->pixbuf);
                nr_arena_image_set_style(NR_ARENA_IMAGE(ai), SP_OBJECT_STYLE(SP_OBJECT(item)));
            if (image->aspect_align == SP_ASPECT_NONE)
            nr_arena_image_set_pixels (NR_ARENA_IMAGE (ai),
                       gdk_pixbuf_get_pixels (image->pixbuf),
                       gdk_pixbuf_get_width (image->pixbuf),
                       gdk_pixbuf_get_height (image->pixbuf),
                       rs);
        else // preserveAspectRatio
            nr_arena_image_set_pixels (NR_ARENA_IMAGE (ai),
                       gdk_pixbuf_get_pixels (image->pixbuf) + image->trimx*pixskip + image->trimy*rs,
                       image->trimwidth,
                       image->trimheight,
                       rs);
    } else {
        nr_arena_image_set_pixels (NR_ARENA_IMAGE (ai), NULL, 0, 0, 0);
    }
    if (image->aspect_align == SP_ASPECT_NONE)
        nr_arena_image_set_geometry (NR_ARENA_IMAGE (ai), image->x.computed, image->y.computed, image->width.computed, image->height.computed);
    else // preserveAspectRatio
        nr_arena_image_set_geometry (NR_ARENA_IMAGE (ai), image->viewx, image->viewy, image->viewwidth, image->viewheight);

    return ai;
}

/*
 * utility function to try loading image from href
 *
 * docbase/relative_src
 * absolute_src
 *
 */

GdkPixbuf *
sp_image_repr_read_image (Inkscape::XML::Node * repr)
{
    const gchar * filename, * docbase;
    gchar * fullname;
    GdkPixbuf * pixbuf;

    filename = repr->attribute("xlink:href");
    if (filename == NULL) filename = repr->attribute("href"); /* FIXME */
    if (filename != NULL) {
        if (strncmp (filename,"file:",5) == 0) {
            fullname = g_filename_from_uri(filename, NULL, NULL);
            if (fullname) {
                // TODO check this. Was doing a UTF-8 to filename conversion here.
                pixbuf = Inkscape::IO::pixbuf_new_from_file (fullname, NULL);
                if (pixbuf != NULL) return pixbuf;
            }
        } else if (strncmp (filename,"data:",5) == 0) {
            /* data URI - embedded image */
            filename += 5;
            pixbuf = sp_image_repr_read_dataURI (filename);
            if (pixbuf != NULL) return pixbuf;
        } else if (!g_path_is_absolute (filename)) {
            /* try to load from relative pos */
            docbase = sp_repr_document_root (sp_repr_document (repr))->attribute("sodipodi:docbase");
            if (!docbase) docbase = ".";
            fullname = g_build_filename(docbase, filename, NULL);
            pixbuf = Inkscape::IO::pixbuf_new_from_file( fullname, NULL );
            g_free (fullname);
            if (pixbuf != NULL) return pixbuf;
        } else {
            /* try absolute filename */
            pixbuf = Inkscape::IO::pixbuf_new_from_file( filename, NULL );
            if (pixbuf != NULL) return pixbuf;
        }
    }
    /* at last try to load from sp absolute path name */
    filename = repr->attribute("sodipodi:absref");
    if (filename != NULL) {
        pixbuf = Inkscape::IO::pixbuf_new_from_file( filename, NULL );
        if (pixbuf != NULL) return pixbuf;
    }
    /* Nope: We do not find any valid pixmap file :-( */
    pixbuf = gdk_pixbuf_new_from_xpm_data ((const gchar **) brokenimage_xpm);

    /* It should be included xpm, so if it still does not does load, */
    /* our libraries are broken */
    g_assert (pixbuf != NULL);

    return pixbuf;
}

static GdkPixbuf *
sp_image_pixbuf_force_rgba (GdkPixbuf * pixbuf)
{
    GdkPixbuf * newbuf;

    if (gdk_pixbuf_get_has_alpha (pixbuf)) return pixbuf;

    newbuf = gdk_pixbuf_add_alpha (pixbuf, FALSE, 0, 0, 0);
    gdk_pixbuf_unref (pixbuf);

    return newbuf;
}

/* We assert that realpixbuf is either NULL or identical size to pixbuf */

static void
sp_image_update_canvas_image (SPImage *image)
{
    int rs, pixskip;
    SPItem *item;
    SPItemView *v;

    item = SP_ITEM (image);

    if (image->pixbuf) {
        /* fixme: We are slightly violating spec here (Lauris) */
        if (!image->width._set) {
            image->width.computed = gdk_pixbuf_get_width (image->pixbuf);
        }
        if (!image->height._set) {
            image->height.computed = gdk_pixbuf_get_height (image->pixbuf);
        }
    }

    for (v = item->display; v != NULL; v = v->next) {
            pixskip = gdk_pixbuf_get_n_channels (image->pixbuf) * gdk_pixbuf_get_bits_per_sample (image->pixbuf) / 8;
        rs = gdk_pixbuf_get_rowstride (image->pixbuf);
                nr_arena_image_set_style (NR_ARENA_IMAGE(v->arenaitem), SP_OBJECT_STYLE(SP_OBJECT(image)));
        if (image->aspect_align == SP_ASPECT_NONE) {
            nr_arena_image_set_pixels (NR_ARENA_IMAGE (v->arenaitem),
                       gdk_pixbuf_get_pixels (image->pixbuf),
                       gdk_pixbuf_get_width (image->pixbuf),
                       gdk_pixbuf_get_height (image->pixbuf),
                       rs);
            nr_arena_image_set_geometry (NR_ARENA_IMAGE (v->arenaitem),
                         image->x.computed, image->y.computed,
                         image->width.computed, image->height.computed);
        } else { // preserveAspectRatio
            nr_arena_image_set_pixels (NR_ARENA_IMAGE (v->arenaitem),
                       gdk_pixbuf_get_pixels (image->pixbuf) + image->trimx*pixskip + image->trimy*rs,
                       image->trimwidth,
                       image->trimheight,
                       rs);
            nr_arena_image_set_geometry (NR_ARENA_IMAGE (v->arenaitem),
                         image->viewx, image->viewy,
                         image->viewwidth, image->viewheight);
        }
    }
}

static void sp_image_snappoints(SPItem const *item, SnapPointsIter p)
{
     if (((SPItemClass *) parent_class)->snappoints) {
         ((SPItemClass *) parent_class)->snappoints (item, p);
     }
}

/*
 * Initially we'll do:
 * Transform x, y, set x, y, clear translation
 */

static NR::Matrix
sp_image_set_transform(SPItem *item, NR::Matrix const &xform)
{
    SPImage *image = SP_IMAGE(item);

    /* Calculate position in parent coords. */
    NR::Point pos( NR::Point(image->x.computed, image->y.computed) * xform );

    /* This function takes care of translation and scaling, we return whatever parts we can't
       handle. */
    NR::Matrix ret(NR::transform(xform));
    NR::Point const scale(hypot(ret[0], ret[1]),
                  hypot(ret[2], ret[3]));
    if ( scale[NR::X] > 1e-9 ) {
        ret[0] /= scale[NR::X];
        ret[1] /= scale[NR::X];
    } else {
        ret[0] = 1.0;
        ret[1] = 0.0;
    }
    if ( scale[NR::Y] > 1e-9 ) {
        ret[2] /= scale[NR::Y];
        ret[3] /= scale[NR::Y];
    } else {
        ret[2] = 0.0;
        ret[3] = 1.0;
    }

    image->width = image->width.computed * scale[NR::X];
    image->height = image->height.computed * scale[NR::Y];

    /* Find position in item coords */
    pos = pos * ret.inverse();
    image->x = pos[NR::X];
    image->y = pos[NR::Y];

    item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

    return ret;
}

static GdkPixbuf *
sp_image_repr_read_dataURI (const gchar * uri_data)
{   GdkPixbuf * pixbuf = NULL;

    gint data_is_image = 0;
    gint data_is_base64 = 0;

    const gchar * data = uri_data;

    while (*data) {
        if (strncmp (data,"base64",6) == 0) {
            /* base64-encoding */
            data_is_base64 = 1;
            data_is_image = 1; // Illustrator produces embedded images without MIME type, so we assume it's image no matter what
            data += 6;
        }
        else if (strncmp (data,"image/png",9) == 0) {
            /* PNG image */
            data_is_image = 1;
            data += 9;
        }
        else if (strncmp (data,"image/jpg",9) == 0) {
            /* JPEG image */
            data_is_image = 1;
            data += 9;
        }
        else if (strncmp (data,"image/jpeg",10) == 0) {
            /* JPEG image */
            data_is_image = 1;
            data += 10;
        }
        else { /* unrecognized option; skip it */
            while (*data) {
                if (((*data) == ';') || ((*data) == ',')) break;
                data++;
            }
        }
        if ((*data) == ';') {
            data++;
            continue;
        }
        if ((*data) == ',') {
            data++;
            break;
        }
    }

    if ((*data) && data_is_image && data_is_base64) {
        pixbuf = sp_image_repr_read_b64 (data);
    }

    return pixbuf;
}

static GdkPixbuf *
sp_image_repr_read_b64 (const gchar * uri_data)
{   GdkPixbuf * pixbuf = NULL;
    GdkPixbufLoader * loader = NULL;

    gint j;
    gint k;
    gint l;
    gint b;
    gint len;
    gint eos = 0;
    gint failed = 0;

    guint32 bits;

    static const gchar B64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    const gchar* btr = uri_data;

    gchar ud[4];

    guchar bd[57];

    loader = gdk_pixbuf_loader_new ();

    if (loader == NULL) return NULL;

    while (eos == 0) {
        l = 0;
        for (j = 0; j < 19; j++) {
            len = 0;
            for (k = 0; k < 4; k++) {
                while (isspace ((int) (*btr))) {
                    if ((*btr) == '\0') break;
                    btr++;
                }
                if (eos) {
                    ud[k] = 0;
                    continue;
                }
                if (((*btr) == '\0') || ((*btr) == '=')) {
                    eos = 1;
                    ud[k] = 0;
                    continue;
                }
                ud[k] = 64;
                for (b = 0; b < 64; b++) { /* There must a faster way to do this... ?? */
                    if (B64[b] == (*btr)) {
                        ud[k] = (gchar) b;
                        break;
                    }
                }
                if (ud[k] == 64) { /* data corruption ?? */
                    eos = 1;
                    ud[k] = 0;
                    continue;
                }
                btr++;
                len++;
            }
            bits = (guint32) ud[0];
            bits = (bits << 6) | (guint32) ud[1];
            bits = (bits << 6) | (guint32) ud[2];
            bits = (bits << 6) | (guint32) ud[3];
            bd[l++] = (guchar) ((bits & 0xff0000) >> 16);
            if (len > 2) {
                bd[l++] = (guchar) ((bits & 0xff00) >>  8);
            }
            if (len > 3) {
                bd[l++] = (guchar)  (bits & 0xff);
            }
        }

        if (!gdk_pixbuf_loader_write (loader, (const guchar *) bd, (size_t) l, NULL)) {
            failed = 1;
            break;
        }
    }

    gdk_pixbuf_loader_close (loader, NULL);

    if (!failed) pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);

    return pixbuf;
}

/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :