PNG output for Cairo renderer

diff --git a/src/extension/internal/cairo-png-out.cpp b/src/extension/internal/cairo-png-out.cpp
new file mode 100644 (file)
index 0000000..34c4258
--- /dev/null
+++ b/src/extension/internal/cairo-png-out.cpp
@@ -0,0 +1,128 @@
+/*\r
+ * A quick hack to use the Cairo renderer to write out a file.  This\r
+ * then makes 'save as...' PNG.\r
+ *\r
+ * Authors:\r
+ *   Ted Gould <ted@gould.cx>\r
+ *   Ulf Erikson <ulferikson@users.sf.net>\r
+ *\r
+ * Copyright (C) 2004-2006 Authors\r
+ *\r
+ * Released under GNU GPL, read the file 'COPYING' for more information\r
+ */\r
+\r
+#ifdef HAVE_CONFIG_H\r
+# include <config.h>\r
+#endif\r
+#include "cairo-png-out.h"\r
+#include "cairo-render-context.h"\r
+#include "cairo-renderer.h"\r
+#include <print.h>\r
+#include "extension/system.h"\r
+#include "extension/print.h"\r
+#include "extension/db.h"\r
+#include "extension/output.h"\r
+#include "display/nr-arena.h"\r
+#include "display/nr-arena-item.h"\r
+\r
+#include <libnr/n-art-bpath.h>\r
+\r
+#include "display/curve.h"\r
+#include "display/canvas-bpath.h"\r
+#include "sp-item.h"\r
+#include "style.h"\r
+#include "sp-root.h"\r
+#include "sp-shape.h"\r
+\r
+#include "io/sys.h"\r
+\r
+namespace Inkscape {\r
+namespace Extension {\r
+namespace Internal {\r
+\r
+bool\r
+CairoRendererOutput::check (Inkscape::Extension::Extension * module)\r
+{\r
+       return TRUE;\r
+}\r
+\r
+static bool\r
+png_render_document_to_file(SPDocument *doc, gchar const *filename)\r
+{\r
+    CairoRenderer *renderer;\r
+    CairoRenderContext *ctx;\r
+\r
+    sp_document_ensure_up_to_date(doc);\r
+\r
+/* Start */\r
+    /* Create new arena */\r
+    SPItem *base = SP_ITEM(sp_document_root(doc));\r
+    NRArena *arena = NRArena::create();\r
+    unsigned dkey = sp_item_display_key_new(1);\r
+    NRArenaItem *root = sp_item_invoke_show(base, arena, dkey, SP_ITEM_SHOW_DISPLAY);\r
+    \r
+    /* Create renderer and context */\r
+    renderer = new CairoRenderer();\r
+    ctx = renderer->createContext();\r
+\r
+    /* Render document */\r
+    bool ret = renderer->setupDocument(ctx, doc);\r
+    if (ret) {\r
+        renderer->renderItem(ctx, base);\r
+        ctx->saveAsPng(filename);\r
+        ret = ctx->finish();\r
+    }\r
+    renderer->destroyContext(ctx);\r
+\r
+    /* Release arena */\r
+    sp_item_invoke_hide(base, dkey);\r
+    nr_arena_item_unref(root);\r
+    nr_object_unref((NRObject *) arena);\r
+/* end */\r
+    delete renderer;\r
+\r
+    return ret;\r
+}\r
+\r
+\r
+/**\r
+    \brief  This function calls the output module with the filename\r
+       \param  mod   unused\r
+       \param  doc   Document to be saved\r
+    \param  uri   Filename to save to (probably will end in .png)\r
+*/\r
+void\r
+CairoRendererOutput::save (Inkscape::Extension::Output *mod, SPDocument *doc, const gchar *uri)\r
+{\r
+    if (!png_render_document_to_file(doc, uri))\r
+        throw Inkscape::Extension::Output::save_failed();\r
+\r
+       return;\r
+}\r
+\r
+/**\r
+       \brief   A function allocate a copy of this function.\r
+\r
+       This is the definition of Cairo PNG out.  This function just\r
+       calls the extension system with the memory allocated XML that\r
+       describes the data.\r
+*/\r
+void\r
+CairoRendererOutput::init (void)\r
+{\r
+       Inkscape::Extension::build_from_mem(\r
+               "<inkscape-extension>\n"\r
+                       "<name>Cairo PNG Output</name>\n"\r
+                       "<id>org.inkscape.output.png.cairo</id>\n"\r
+                       "<output>\n"\r
+                               "<extension>.png</extension>\n"\r
+                "<mimetype>image/png</mimetype>\n"\r
+                               "<filetypename>Cairo PNG (*.png)</filetypename>\n"\r
+                               "<filetypetooltip>PNG File</filetypetooltip>\n"\r
+                       "</output>\n"\r
+               "</inkscape-extension>", new CairoRendererOutput());\r
+\r
+       return;\r
+}\r
+\r
+} } }  /* namespace Inkscape, Extension, Implementation */\r