From 915f222e72a35382120e42ff1d204a99b16644b6 Mon Sep 17 00:00:00 2001
From: miklosh <miklosh@users.sourceforge.net>
Date: Sun, 1 Oct 2006 14:12:04 +0000
Subject: [PATCH] PNG output for Cairo renderer

---
 src/extension/internal/cairo-png-out.cpp | 128 +++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 src/extension/internal/cairo-png-out.cpp

diff --git a/src/extension/internal/cairo-png-out.cpp b/src/extension/internal/cairo-png-out.cpp
new file mode 100644
index 000000000..34c4258df
--- /dev/null
+++ b/src/extension/internal/cairo-png-out.cpp
@@ -0,0 +1,128 @@
+/*
+ * A quick hack to use the Cairo renderer to write out a file.  This
+ * then makes 'save as...' PNG.
+ *
+ * Authors:
+ *   Ted Gould <ted@gould.cx>
+ *   Ulf Erikson <ulferikson@users.sf.net>
+ *
+ * Copyright (C) 2004-2006 Authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include "cairo-png-out.h"
+#include "cairo-render-context.h"
+#include "cairo-renderer.h"
+#include <print.h>
+#include "extension/system.h"
+#include "extension/print.h"
+#include "extension/db.h"
+#include "extension/output.h"
+#include "display/nr-arena.h"
+#include "display/nr-arena-item.h"
+
+#include <libnr/n-art-bpath.h>
+
+#include "display/curve.h"
+#include "display/canvas-bpath.h"
+#include "sp-item.h"
+#include "style.h"
+#include "sp-root.h"
+#include "sp-shape.h"
+
+#include "io/sys.h"
+
+namespace Inkscape {
+namespace Extension {
+namespace Internal {
+
+bool
+CairoRendererOutput::check (Inkscape::Extension::Extension * module)
+{
+	return TRUE;
+}
+
+static bool
+png_render_document_to_file(SPDocument *doc, gchar const *filename)
+{
+    CairoRenderer *renderer;
+    CairoRenderContext *ctx;
+
+    sp_document_ensure_up_to_date(doc);
+
+/* Start */
+    /* Create new arena */
+    SPItem *base = SP_ITEM(sp_document_root(doc));
+    NRArena *arena = NRArena::create();
+    unsigned dkey = sp_item_display_key_new(1);
+    NRArenaItem *root = sp_item_invoke_show(base, arena, dkey, SP_ITEM_SHOW_DISPLAY);
+    
+    /* Create renderer and context */
+    renderer = new CairoRenderer();
+    ctx = renderer->createContext();
+
+    /* Render document */
+    bool ret = renderer->setupDocument(ctx, doc);
+    if (ret) {
+        renderer->renderItem(ctx, base);
+        ctx->saveAsPng(filename);
+        ret = ctx->finish();
+    }
+    renderer->destroyContext(ctx);
+
+    /* Release arena */
+    sp_item_invoke_hide(base, dkey);
+    nr_arena_item_unref(root);
+    nr_object_unref((NRObject *) arena);
+/* end */
+    delete renderer;
+
+    return ret;
+}
+
+
+/**
+    \brief  This function calls the output module with the filename
+	\param  mod   unused
+	\param  doc   Document to be saved
+    \param  uri   Filename to save to (probably will end in .png)
+*/
+void
+CairoRendererOutput::save (Inkscape::Extension::Output *mod, SPDocument *doc, const gchar *uri)
+{
+    if (!png_render_document_to_file(doc, uri))
+        throw Inkscape::Extension::Output::save_failed();
+
+	return;
+}
+
+/**
+	\brief   A function allocate a copy of this function.
+
+	This is the definition of Cairo PNG out.  This function just
+	calls the extension system with the memory allocated XML that
+	describes the data.
+*/
+void
+CairoRendererOutput::init (void)
+{
+	Inkscape::Extension::build_from_mem(
+		"<inkscape-extension>\n"
+			"<name>Cairo PNG Output</name>\n"
+			"<id>org.inkscape.output.png.cairo</id>\n"
+			"<output>\n"
+				"<extension>.png</extension>\n"
+                "<mimetype>image/png</mimetype>\n"
+				"<filetypename>Cairo PNG (*.png)</filetypename>\n"
+				"<filetypetooltip>PNG File</filetypetooltip>\n"
+			"</output>\n"
+		"</inkscape-extension>", new CairoRendererOutput());
+
+	return;
+}
+
+} } }  /* namespace Inkscape, Extension, Implementation */
-- 
2.39.5