r16217@tres: ted | 2007-08-10 10:36:27 -0700

 ImageMagick effects patch from Chris Brown.  Google Summer of Code 
 project.

(bzr r3450)

1 files changed, 175 insertions, 0 deletions

diff --git a/src/extension/internal/bitmap/imagemagick.cpp b/src/extension/internal/bitmap/imagemagick.cpp
new file mode 100644
index 000000000..83650aaa7
--- /dev/null
+++ b/src/extension/internal/bitmap/imagemagick.cpp
@@ -0,0 +1,175 @@
+/*
+ * Authors:
+ *   Christopher Brown <audiere@gmail.com>
+ *   Ted Gould <ted@gould.cx>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include <gtkmm/box.h>
+#include <gtkmm/adjustment.h>
+#include <gtkmm/spinbutton.h>
+
+#include <glib/gstdio.h>
+
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "selection.h"
+#include "sp-object.h"
+#include "util/glib-list-iterators.h"
+
+#include "extension/effect.h"
+#include "extension/system.h"
+
+#include "imagemagick.h"
+
+namespace Inkscape {
+namespace Extension {
+namespace Internal {
+namespace Bitmap {
+
+bool
+ImageMagick::load(Inkscape::Extension::Extension *module)
+{
+	_loaded = FALSE;
+	return TRUE;
+}
+
+void
+ImageMagick::commitDocument(void) {
+	_loaded = FALSE;
+}
+
+void
+ImageMagick::cancelDocument(void) {	
+	for (int i = 0; i < _imageCount; i++) {
+		_nodes[i]->setAttribute("xlink:href", _originals[i], true);
+	}
+	
+	_loaded = FALSE;
+}
+
+void
+ImageMagick::readImage(const char *xlink, Magick::Image *image)
+{
+	// Find if the xlink:href is base64 data, i.e. if the image is embedded
+	char *search = strndup(xlink, 30);
+	if (strstr(search, "base64") != (char*)NULL) {
+		// 7 = strlen("base64") + strlen(",")
+		char* pureBase64 = strstr(xlink, "base64") + 7;		
+		Magick::Blob blob;
+		blob.base64(pureBase64);
+		image->read(blob);
+	}
+	else {
+		image->read(xlink);
+	}
+}
+
+void
+ImageMagick::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *document)
+{
+	refreshParameters(module);
+	
+	if (!_loaded)
+	{		
+		SPDesktop *desktop = (SPDesktop*)document;
+		const GSList *selectedReprList = desktop->selection->reprList();
+		int selectCount = g_slist_length((GSList *)selectedReprList);
+		
+		// Init the data-holders
+		_nodes = new Inkscape::XML::Node*[selectCount];
+		_originals = new const char*[selectCount];
+		_images = new Magick::Image[selectCount];
+		_imageCount = 0;
+		
+		// Loop through selected nodes
+		for (; selectedReprList != NULL; selectedReprList = g_slist_next(selectedReprList))
+		{
+			Inkscape::XML::Node *node = reinterpret_cast<Inkscape::XML::Node *>(selectedReprList->data);
+			if (!strcmp(node->name(), "image") || !strcmp(node->name(), "svg:image"))
+			{
+				_nodes[_imageCount] = node;	
+				char const *xlink = node->attribute("xlink:href");
+				
+				_originals[_imageCount] = xlink;
+				
+				readImage(xlink, &_images[_imageCount]);
+				
+				_imageCount++;
+			}			
+		}
+		
+		_loaded = 1;
+	}
+	
+	for (int i = 0; i < _imageCount; i++)
+	{
+		try
+		{
+			Magick::Image effectedImage = _images[i];
+			applyEffect(&effectedImage);
+
+			Magick::Blob blob;
+			effectedImage.write(&blob);
+				
+				std::string raw_string = blob.base64();
+				const int raw_len = raw_string.length();
+				const char *raw = raw_string.c_str();
+				const char *raw_i = raw;	
+				
+				int formatted_len = (int)(raw_len / 76.0 * 78.0) + 100;
+				char *formatted = new char[formatted_len];
+				char *formatted_i = formatted;
+				// data:image/png;base64,
+				formatted_i = stpcpy(formatted_i, "data:image/");
+				formatted_i = stpcpy(formatted_i, effectedImage.magick().c_str());
+				formatted_i = stpcpy(formatted_i, ";base64, \n");
+				while (strnlen(raw_i, 80) > 76)
+				{
+					formatted_i = stpncpy(formatted_i, raw_i, 76);
+					formatted_i = stpcpy(formatted_i, "\n");					
+					raw_i += 76;		
+				}
+				if (strlen(raw_i) > 0)
+				{
+					formatted_i = stpcpy(formatted_i, raw_i);
+					formatted_i = stpcpy(formatted_i, "\n");
+				}
+				
+				formatted_i = stpcpy(formatted_i, "\0");
+				
+				_nodes[i]->setAttribute("xlink:href", formatted, true);
+		}
+		catch (Magick::Exception &error_) {
+			printf("Caught exception: %s \n", error_.what());
+		}
+	}
+}
+
+/** \brief  A function to get the prefences for the grid
+    \param  moudule  Module which holds the params
+    \param  view     Unused today - may get style information in the future.
+
+    Uses AutoGUI for creating the GUI.
+*/
+Gtk::Widget *
+ImageMagick::prefs_effect(Inkscape::Extension::Effect *module, Inkscape::UI::View::View * view, sigc::signal<void> * changeSignal)
+{
+    SPDocument * current_document = view->doc();
+
+    using Inkscape::Util::GSListConstIterator;
+    GSListConstIterator<SPItem *> selected = sp_desktop_selection((SPDesktop *)view)->itemList();
+    Inkscape::XML::Node * first_select = NULL;
+    if (selected != NULL) 
+        first_select = SP_OBJECT_REPR(*selected);
+
+    return module->autogui(current_document, first_select, changeSignal);
+}
+
+}; /* namespace Bitmap */
+}; /* namespace Internal */
+}; /* namespace Extension */
+}; /* namespace Inkscape */