factor native PNG export out of file.cpp in preparation for new export dialog

(bzr r1430)

1 files changed, 108 insertions, 174 deletions

diff --git a/src/file.cpp b/src/file.cpp
index 3c8adf87b..a9c9184f6 100644
--- a/src/file.cpp
+++ b/src/file.cpp
@@ -887,209 +887,143 @@ sp_file_import(GtkWidget *widget)
 ## E X P O R T
 ######################*/
 
+//#define NEW_EXPORT_DIALOG
+
+
+
+#ifdef NEW_EXPORT_DIALOG
+
+static Inkscape::UI::Dialog::FileExportDialog *exportDialogInstance = NULL;
+
 /**
- *
+ *  Display an Export dialog, export as the selected type if OK pressed
  */
-void
+bool
 sp_file_export_dialog(void *widget)
 {
-    sp_export_dialog();
-}
+    //# temp hack for 'doc' until we can switch to this dialog
+    SPDocument *doc = SP_ACTIVE_DOCUMENT;
 
-#include <display/nr-arena-item.h>
-#include <display/nr-arena.h>
+    Glib::ustring export_path; 
+    Glib::ustring export_loc; 
 
-struct SPEBP {
-    int width, height, sheight;
-    guchar r, g, b, a;
-    NRArenaItem *root; // the root arena item to show; it is assumed that all unneeded items are hidden
-    guchar *px;
-    unsigned (*status)(float, void *);
-    void *data;
-};
+    Inkscape::XML::Node *repr = sp_document_repr_root(doc);
 
+    Inkscape::Extension::Output *extension;
 
-/**
- *
- */
-static int
-sp_export_get_rows(guchar const **rows, int row, int num_rows, void *data)
-{
-    struct SPEBP *ebp = (struct SPEBP *) data;
+    //# Get the default extension name
+    Glib::ustring default_extension;
+    char *attr = (char *)repr->attribute("inkscape:output_extension");
+    if (!attr)
+        attr = (char *)prefs_get_string_attribute("dialogs.save_as", "default");
+    if (attr)
+        default_extension = attr;
+    //g_message("%s: extension name: '%s'", __FUNCTION__, default_extension);
 
-    if (ebp->status) {
-        if (!ebp->status((float) row / ebp->height, ebp->data)) return 0;
-    }
+    if (doc->uri == NULL)
+        {
+        char formatBuf[256];
+
+        Glib::ustring filename_extension = ".svg";
+        extension = dynamic_cast<Inkscape::Extension::Output *>
+              (Inkscape::Extension::db.get(default_extension.c_str()));
+        //g_warning("%s: extension ptr: 0x%x", __FUNCTION__, (unsigned int)extension);
+        if (extension)
+            filename_extension = extension->get_extension();
+
+        attr = (char *)prefs_get_string_attribute("dialogs.save_as", "path");
+        if (attr)
+            export_path = attr;
+
+        if (!Inkscape::IO::file_test(export_path.c_str(),
+              (GFileTest)(G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR)))
+            export_path = "";
+
+        if (export_path.size()<1)
+            export_path = g_get_home_dir();
+
+        export_loc = export_path;
+        export_loc.append(G_DIR_SEPARATOR_S);
+        snprintf(formatBuf, 255, _("drawing%s"), filename_extension.c_str());
+        export_loc.append(formatBuf);
 
-    num_rows = MIN(num_rows, ebp->sheight);
-    num_rows = MIN(num_rows, ebp->height - row);
-
-    /* Set area of interest */
-    NRRectL bbox;
-    bbox.x0 = 0;
-    bbox.y0 = row;
-    bbox.x1 = ebp->width;
-    bbox.y1 = row + num_rows;
-    /* Update to renderable state */
-    NRGC gc(NULL);
-    nr_matrix_set_identity(&gc.transform);
-
-    nr_arena_item_invoke_update(ebp->root, &bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
-
-    NRPixBlock pb;
-    nr_pixblock_setup_extern(&pb, NR_PIXBLOCK_MODE_R8G8B8A8N,
-                             bbox.x0, bbox.y0, bbox.x1, bbox.y1,
-                             ebp->px, 4 * ebp->width, FALSE, FALSE);
-
-    for (int r = 0; r < num_rows; r++) {
-        guchar *p = NR_PIXBLOCK_PX(&pb) + r * pb.rs;
-        for (int c = 0; c < ebp->width; c++) {
-            *p++ = ebp->r;
-            *p++ = ebp->g;
-            *p++ = ebp->b;
-            *p++ = ebp->a;
         }
-    }
+    else
+        {
+        export_path = Glib::path_get_dirname(doc->uri);
+        }
 
-    /* Render */
-    nr_arena_item_invoke_render(ebp->root, &bbox, &pb, 0);
+    // convert save_loc from utf-8 to locale
+    // is this needed any more, now that everything is handled in
+    // Inkscape::IO?
+    Glib::ustring export_path_local = Glib::filename_from_utf8(export_path);
+    if ( export_path_local.size() > 0) 
+        export_path = export_path_local;
 
-    for (int r = 0; r < num_rows; r++) {
-        rows[r] = NR_PIXBLOCK_PX(&pb) + r * pb.rs;
-    }
+    //# Show the SaveAs dialog
+    if (!exportDialogInstance)
+        exportDialogInstance =
+             Inkscape::UI::Dialog::FileExportDialog::create(
+                 export_path,
+                 Inkscape::UI::Dialog::EXPORT_TYPES,
+                 (char const *) _("Select file to export to"),
+                 default_extension
+            );
 
-    nr_pixblock_release(&pb);
+    bool success = exportDialogInstance->show();
+    if (!success)
+        return success;
 
-    return num_rows;
-}
+    Glib::ustring fileName = exportDialogInstance->getFilename();
 
-/**
-Hide all items which are not listed in list, recursively, skipping groups and defs
-*/
-void
-hide_other_items_recursively(SPObject *o, GSList *list, unsigned dkey)
-{
-    if (SP_IS_ITEM(o)
-        && !SP_IS_DEFS(o)
-        && !SP_IS_ROOT(o)
-        && !SP_IS_GROUP(o)
-        && !g_slist_find(list, o))
-    {
-        sp_item_invoke_hide(SP_ITEM(o), dkey);
-    }
+    Inkscape::Extension::Extension *selectionType =
+        exportDialogInstance->getSelectionType();
 
-     // recurse
-    if (!g_slist_find(list, o)) {
-        for (SPObject *child = sp_object_first_child(o) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
-            hide_other_items_recursively(child, list, dkey);
-        }
+
+    if (fileName.size() > 0) {
+        Glib::ustring newFileName = Glib::filename_to_utf8(fileName);
+
+        if ( newFileName.size()>0 )
+            fileName = newFileName;
+        else
+            g_warning( "Error converting save filename to UTF-8." );
+
+        success = file_save(doc, fileName, selectionType, TRUE);
+
+        if (success)
+            prefs_set_recent_file(SP_DOCUMENT_URI(doc), SP_DOCUMENT_NAME(doc));
+
+        export_path = fileName;
+        prefs_set_string_attribute("dialogs.save_as", "path", export_path.c_str());
+
+        return success;
     }
+
+
+    return false;
 }
 
 
-/**
- *  Render the SVG drawing onto a PNG raster image, then save to
- *  a file.  Returns TRUE if succeeded in writing the file,
- *  FALSE otherwise.
- */
-int
-sp_export_png_file(SPDocument *doc, gchar const *filename,
-                   double x0, double y0, double x1, double y1,
-                   unsigned width, unsigned height, double xdpi, double ydpi,
-                   unsigned long bgcolor,
-                   unsigned (*status)(float, void *),
-                   void *data, bool force_overwrite,
-                   GSList *items_only)
-{
-    int write_status = TRUE;
-    g_return_val_if_fail(doc != NULL, FALSE);
-    g_return_val_if_fail(filename != NULL, FALSE);
-    g_return_val_if_fail(width >= 1, FALSE);
-    g_return_val_if_fail(height >= 1, FALSE);
 
-    if (!force_overwrite && !sp_ui_overwrite_file(filename)) {
-        return FALSE;
-    }
 
-    sp_document_ensure_up_to_date(doc);
-
-    /* Go to document coordinates */
-    gdouble t = y0;
-    y0 = sp_document_height(doc) - y1;
-    y1 = sp_document_height(doc) - t;
-
-    /*
-     * 1) a[0] * x0 + a[2] * y1 + a[4] = 0.0
-     * 2) a[1] * x0 + a[3] * y1 + a[5] = 0.0
-     * 3) a[0] * x1 + a[2] * y1 + a[4] = width
-     * 4) a[1] * x0 + a[3] * y0 + a[5] = height
-     * 5) a[1] = 0.0;
-     * 6) a[2] = 0.0;
-     *
-     * (1,3) a[0] * x1 - a[0] * x0 = width
-     * a[0] = width / (x1 - x0)
-     * (2,4) a[3] * y0 - a[3] * y1 = height
-     * a[3] = height / (y0 - y1)
-     * (1) a[4] = -a[0] * x0
-     * (2) a[5] = -a[3] * y1
-     */
-
-    NRMatrix affine;
-    affine.c[0] = width / (x1 - x0);
-    affine.c[1] = 0.0;
-    affine.c[2] = 0.0;
-    affine.c[3] = height / (y1 - y0);
-    affine.c[4] = -affine.c[0] * x0;
-    affine.c[5] = -affine.c[3] * y0;
-
-    //SP_PRINT_MATRIX("SVG2PNG", &affine);
-
-    struct SPEBP ebp;
-    ebp.width  = width;
-    ebp.height = height;
-    ebp.r      = NR_RGBA32_R(bgcolor);
-    ebp.g      = NR_RGBA32_G(bgcolor);
-    ebp.b      = NR_RGBA32_B(bgcolor);
-    ebp.a      = NR_RGBA32_A(bgcolor);
-
-    /* Create new arena */
-    NRArena *arena = NRArena::create();
-    unsigned dkey = sp_item_display_key_new(1);
-
-    /* Create ArenaItems and set transform */
-    ebp.root = sp_item_invoke_show(SP_ITEM(sp_document_root(doc)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
-    nr_arena_item_set_transform(NR_ARENA_ITEM(ebp.root), NR::Matrix(&affine));
-
-    // We show all and then hide all items we don't want, instead of showing only requested items,
-    // because that would not work if the shown item references something in defs
-    if (items_only) {
-        hide_other_items_recursively(sp_document_root(doc), items_only, dkey);
-    }
 
-    ebp.status = status;
-    ebp.data   = data;
 
-    if ((width < 256) || ((width * height) < 32768)) {
-        ebp.px = nr_pixelstore_64K_new(FALSE, 0);
-        ebp.sheight = 65536 / (4 * width);
-        write_status = sp_png_write_rgba_striped(filename, width, height, xdpi, ydpi, sp_export_get_rows, &ebp);
-        nr_pixelstore_64K_free(ebp.px);
-    } else {
-        ebp.px = g_new(guchar, 4 * 64 * width);
-        ebp.sheight = 64;
-        write_status = sp_png_write_rgba_striped(filename, width, height, xdpi, ydpi, sp_export_get_rows, &ebp);
-        g_free(ebp.px);
-    }
 
-    // Hide items
-    sp_item_invoke_hide(SP_ITEM(sp_document_root(doc)), dkey);
+#else
+
+
 
-    /* Free Arena and ArenaItem */
-    nr_arena_item_unref(ebp.root);
-    nr_object_unref((NRObject *) arena);
-    return write_status;
+/**
+ *
+ */
+bool
+sp_file_export_dialog(void *widget)
+{
+    sp_export_dialog();
+    return true;
 }
 
+#endif
 
 /*######################
 ## P R I N T