From 2bee772bed19a55f666d7106c02735f14c0084e4 Mon Sep 17 00:00:00 2001
From: deva <deva>
Date: Mon, 1 May 2006 11:28:35 +0000
Subject: *** empty log message ***

---
 client/svgloader.cc | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 client/svgloader.cc

(limited to 'client/svgloader.cc')

diff --git a/client/svgloader.cc b/client/svgloader.cc
new file mode 100644
index 0000000..642fda3
--- /dev/null
+++ b/client/svgloader.cc
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            svgloader.cc
+ *
+ *  Mon May  1 11:03:39 CEST 2006
+ *  Copyright  2006 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of MIaV.
+ *
+ *  MIaV is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  MIaV is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with MIaV; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "svgloader.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include <cairo.h>
+#include <svg.h>
+#include <svg-cairo.h>
+
+SVGLoader::SVGLoader()
+{
+}
+
+SVGLoader::~SVGLoader()
+{
+}
+
+/* load: This is what you're probably interested in!
+ * -----------------------------------------------------
+ *  If width and height are greater than 0, the image will
+ *  be scaled to that size. wscale and hscale would be ignored.
+ *
+ *  If width and height are less than 1, wscale and hscale will
+ *  resize the width and the height to the specified scales.
+ *
+ *  If width and height are less than 1, and wscale and hscale
+ *  are either 0 or 1, then the image will be loaded at it's
+ *  natural size.
+ *
+ *  See main() for examples.
+ */
+QImage SVGLoader::load(QString file, unsigned int width, unsigned int height, float wscale, float hscale) {
+  svg_cairo_t *scr;
+  int bpp;
+  int btpp;
+  unsigned int rwidth;
+  unsigned int rheight;
+  
+  // Create the SVG cairo stuff. 
+  svg_cairo_create(&scr);
+  svg_cairo_parse(scr, file.toStdString().c_str());
+  
+  if (wscale <= 0) wscale=1;
+  if (hscale <= 0) hscale=1;
+  
+  // Now get the width and height of the SVG content, so we can calculate 
+  // and adjust our image dimensions
+  svg_cairo_get_size (scr, &rwidth, &rheight);
+  
+  // Calculate final width and height of our surface based on the parameters passed
+  if (width > 0) {
+    if (rwidth>width) {
+      wscale=(float)width/(float)rwidth;
+      printf ("rwidth/width = %f\n", wscale);
+    } else {
+      wscale=(float)rwidth/(float)width;
+      printf ("width/wwidth = %f\n", wscale);
+    }
+  } else {
+    width=(int)(rwidth*wscale);
+    printf ("width = %i\n", width);
+  }
+  if (height > 0) {
+    if (rheight>height) {
+      hscale=(float)height/(float)rheight;
+      printf ("height/rheight = %f\n", hscale);
+    } else {
+      hscale=(float)rheight/(float)height;
+      printf ("rheight/height = %f\n", hscale);
+    }
+  } else {
+    height=(int)(rheight*hscale);
+    printf ("height = %i\n", height);
+  }
+    
+  // We will create a CAIRO_FORMAT_ARGB32 surface. We don't need to match
+  // the screen SDL format, but we are interested in the alpha bit
+  bpp=32; // bits per pixel
+  btpp=4; // bytes per pixel
+  
+  // scanline width
+  int stride=width * btpp;
+  
+  // Allocate an image
+  unsigned char *image=(unsigned char*)calloc(stride*height, 1);
+
+  // Create the cairo surface with the adjusted width and height
+  cairo_surface_t *cairo_surface;
+  cairo_surface = cairo_image_surface_create_for_data(image, CAIRO_FORMAT_ARGB32,
+                                                      width, height, stride);
+
+  cairo_t *cr = cairo_create(cairo_surface);
+  cairo_scale(cr, wscale, hscale);
+
+  // Render SVG to our surface
+  svg_cairo_render(scr, cr);
+
+  // Cleanup cairo
+  cairo_surface_destroy(cairo_surface);
+  cairo_destroy(cr);
+
+  // Destroy the svg_cairo structure
+  svg_cairo_destroy(scr);
+
+  // Create the QImage using the render buffer.
+  QImage qimage(image, width, height, QImage::Format_ARGB32);
+  return qimage;
+}
-- 
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