From e7cc0c9cc08957e36f6f910ed4048903c30534a0 Mon Sep 17 00:00:00 2001
From: Povilas Kanapickas <povilas@radix.lt>
Date: Thu, 13 Feb 2014 02:10:07 +0200
Subject: [PATCH 3/7] Wrap cairo script device and script surface APIs

---
 cairomm/context.cc        |   6 ++
 cairomm/filelist.am       |   4 ++
 cairomm/script.cc         | 103 ++++++++++++++++++++++++++++++++++
 cairomm/script.h          | 137 ++++++++++++++++++++++++++++++++++++++++++++++
 cairomm/script_surface.cc |  58 ++++++++++++++++++++
 cairomm/script_surface.h  |  87 +++++++++++++++++++++++++++++
 cairomm/surface.cc        |  13 ++++-
 7 files changed, 407 insertions(+), 1 deletion(-)
 create mode 100644 cairomm/script.cc
 create mode 100644 cairomm/script.h
 create mode 100644 cairomm/script_surface.cc
 create mode 100644 cairomm/script_surface.h

diff --git a/cairomm/context.cc b/cairomm/context.cc
index 95d33e2..bf70ef4 100644
--- a/cairomm/context.cc
+++ b/cairomm/context.cc
@@ -26,6 +26,7 @@
 #include <cairomm/context_private.h>
 #include <cairomm/private.h>
 #include <cairomm/surface.h>
+#include <cairomm/script_surface.h>
 #include <cairomm/scaledfont.h>
 
 /* M_PI is defined in math.h in the case of Microsoft Visual C++ */
@@ -836,6 +837,11 @@ RefPtr<Surface> get_surface_wrapper (cairo_surface_t* surface)
       return wrap_surface_quartz(surface);
       break;
 #endif
+#if CAIRO_HAS_SCRIPT_SURFACE
+    case CAIRO_SURFACE_TYPE_SCRIPT:
+      return RefPtr<ScriptSurface>(new ScriptSurface(surface, false));
+      break;
+#endif
 #if CAIRO_HAS_WIN32_SURFACE
     case CAIRO_SURFACE_TYPE_WIN32:
       return wrap_surface_win32(surface);
diff --git a/cairomm/filelist.am b/cairomm/filelist.am
index 9f0b832..ab26483 100644
--- a/cairomm/filelist.am
+++ b/cairomm/filelist.am
@@ -17,6 +17,8 @@ cairomm_cc =				\
 	quartz_surface.cc		\
 	region.cc \
 	scaledfont.cc			\
+    script.cc       \
+	script_surface.cc		\
 	surface.cc			\
 	win32_font.cc			\
 	win32_surface.cc		\
@@ -37,6 +39,8 @@ cairomm_public_h =			\
 	refptr.h			\
 	region.h \
 	scaledfont.h			\
+    script.h    \
+	script_surface.h    \
 	surface.h			\
 	types.h				\
 	win32_font.h			\
diff --git a/cairomm/script.cc b/cairomm/script.cc
new file mode 100644
index 0000000..ac8b22e
--- /dev/null
+++ b/cairomm/script.cc
@@ -0,0 +1,103 @@
+/* Copyright (C) 2014 The cairomm Development Team
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <cairomm/script_surface.h>
+#include <cairomm/private.h>
+
+namespace Cairo {
+
+#ifdef CAIRO_HAS_SCRIPT_SURFACE
+
+Script::Script(cairo_device_t* cobject, bool has_reference) :
+  Device(cobject, has_reference)
+{}
+
+Script::~Script()
+{
+  // script device is destroyed in base class
+}
+
+void Script::add_from_recording_surface(const RefPtr<ScriptSurface>& recording_surface)
+{
+  ErrorStatus status = cairo_script_from_recording_surface(m_cobject,
+                                                           recording_surface->cobj());
+  check_status_and_throw_exception(status);
+}
+
+ScriptMode Script::get_mode() const
+{
+  return static_cast<ScriptMode>(cairo_script_get_mode(m_cobject));
+}
+
+void Script::set_mode(ScriptMode new_mode)
+{
+  cairo_script_set_mode(m_cobject, static_cast<cairo_script_mode_t>(new_mode));
+}
+
+void Script::write_comment(const std::string& comment)
+{
+  cairo_script_write_comment(m_cobject, comment.data(), comment.length());
+}
+
+RefPtr<Script> Script::create(const std::string& filename)
+{
+  cairo_device_t* cobject = cairo_script_create(filename.c_str());
+  check_status_and_throw_exception(cairo_device_status(cobject));
+  return RefPtr<Script>(new Script(cobject, true /* has reference */));
+}
+
+static cairo_user_data_key_t USER_DATA_KEY_DEVICE_WRITE_FUNC = {0};
+
+static void device_free_slot(void* data)
+{
+  // FIXME: duplicates free_slot in surface.cc
+  Surface::SlotWriteFunc* slot = static_cast<Surface::SlotWriteFunc*>(data);
+  delete slot;
+}
+
+cairo_status_t device_write_func_wrapper(void* closure, const unsigned char* data,
+                                         unsigned int length)
+{
+  // FIXME: duplicates free_slot in surface.cc
+  if (!closure)
+    return CAIRO_STATUS_WRITE_ERROR;
+  Surface::SlotWriteFunc* write_func = static_cast<Surface::SlotWriteFunc*>(closure);
+  return static_cast<cairo_status_t>((*write_func)(data, length));
+}
+
+static void set_write_slot(cairo_device_t* surface,
+                           Surface::SlotWriteFunc* slot) {
+  // the slot will automatically be freed by device_free_slot() when the
+  // underlying C instance is destroyed
+  cairo_device_set_user_data(surface, &USER_DATA_KEY_DEVICE_WRITE_FUNC, slot,
+                             &device_free_slot);
+}
+
+RefPtr<Script> Script::create_for_stream(const Surface::SlotWriteFunc& write_func)
+{
+  Surface::SlotWriteFunc* slot_copy = new Surface::SlotWriteFunc(write_func);
+  cairo_device_t* cobject = cairo_script_create_for_stream(device_write_func_wrapper,
+                                                           slot_copy);
+  check_status_and_throw_exception(cairo_device_status(cobject));
+  set_write_slot(cobject, slot_copy);
+  return RefPtr<Script>(new Script(cobject, true /* has reference */));
+}
+
+#endif // CAIRO_HAS_SCRIPT_SURFACE
+
+} //namespace Cairo
diff --git a/cairomm/script.h b/cairomm/script.h
new file mode 100644
index 0000000..3bd4778
--- /dev/null
+++ b/cairomm/script.h
@@ -0,0 +1,137 @@
+/* Copyright (C) 2014 The cairomm Development Team
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef __CAIROMM_SCRIPT_H
+#define __CAIROMM_SCRIPT_H
+
+#include <string>
+#include <cairomm/device.h>
+#include <cairomm/surface.h> // SlotWriteFunc
+#include <cairomm/enums.h>
+
+#ifdef CAIRO_HAS_SCRIPT_SURFACE
+#include <cairo-script.h>
+#endif
+
+namespace Cairo {
+
+#ifdef CAIRO_HAS_SCRIPT_SURFACE
+
+class ScriptSurface;
+
+/**
+ * A set of script output variants for the script surface.
+ *
+ * @since 1.12
+ */
+enum ScriptMode {
+
+    /// The output will be in readable text (default).
+    SCRIPT_MODE_ASCII = CAIRO_SCRIPT_MODE_ASCII,
+
+    /// The output will use byte codes.
+    SCRIPT_MODE_BINARY = CAIRO_SCRIPT_MODE_BINARY
+};
+
+/**
+ * The script surface provides the ability to render to a native script that
+ * matches the cairo drawing model. The scripts can be replayed using tools under
+ * the util/cairo-script directoriy, or with cairo-perf-trace.
+ *
+ * @since 1.12
+ */
+class Script : public Device {
+public:
+
+  /**
+   * Create a C++ wrapper for the C instance. This C++ instance should then be
+   * given to a RefPtr.
+   *
+   * @param cobject The C instance.
+   * @param has_reference whether we already have a reference. Otherwise, the
+   * constructor will take an extra reference.
+   *
+   * @since 1.12
+   */
+  explicit Script(cairo_device_t* cobject, bool has_reference = false);
+  virtual ~Script();
+
+  /**
+   * Converts the record operations in recording_surface into a script.
+   *
+   * @param recording_surface The recording surface to replay
+   *
+   * Throws an exception on error.
+   *
+   * @since 1.12
+   */
+  void add_from_recording_surface(const RefPtr<ScriptSurface>& recording_surface);
+
+  /**
+   * Queries the script for its current output mode.
+   *
+   * @since 1.12
+   */
+  ScriptMode get_mode() const;
+
+  /**
+   * Change the output mode of the script.
+   *
+   * @param mode The new mode.
+   *
+   * @since 1.12
+   */
+  void set_mode(ScriptMode new_mode);
+
+  /**
+   * Emit a string verbatim into the script.
+   *
+   * @param comment The string to emit
+   */
+  void write_comment(const std::string& comment);
+
+  /**
+   * Creates a output device for emitting the script, used when creating the
+   * individual surfaces.
+   *
+   * @param filename The name (path) of the file to write the script to.
+   *
+   * Throws an exception on error.
+   *
+   * @since 1.12
+   */
+  static RefPtr<Script> create(const std::string& filename);
+
+  /**
+   * Creates a output device for emitting the script, used when creating the
+   * individual surfaces.
+   *
+   * @param write_func Callback function passed the bytes written to the script
+   *
+   * @since 1.12
+   */
+  static RefPtr<Script> create_for_stream(const Surface::SlotWriteFunc& write_func);
+
+};
+
+#endif // CAIRO_HAS_SCRIPT_SURFACE
+
+} // namespace Cairo
+
+#endif //__CAIROMM_SCRIPT_SURFACE_H
+
diff --git a/cairomm/script_surface.cc b/cairomm/script_surface.cc
new file mode 100644
index 0000000..645bc62
--- /dev/null
+++ b/cairomm/script_surface.cc
@@ -0,0 +1,58 @@
+/* Copyright (C) 2014 The cairomm Development Team
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <cairomm/script_surface.h>
+#include <cairomm/private.h>
+
+namespace Cairo {
+
+#ifdef CAIRO_HAS_SCRIPT_SURFACE
+
+ScriptSurface::ScriptSurface(cairo_surface_t* cobject, bool has_reference) :
+    Surface(cobject, has_reference)
+{}
+
+ScriptSurface::~ScriptSurface()
+{
+  // surface is destroyed in base class
+}
+
+RefPtr<ScriptSurface> ScriptSurface::create(const RefPtr<Script>& script,
+                                            Content content,
+                                            double width, double height)
+{
+  cairo_surface_t* cobject =
+        cairo_script_surface_create(script->cobj(), static_cast<cairo_content_t>(content),
+                                    width, height);
+  check_status_and_throw_exception(cairo_surface_status(cobject));
+  return RefPtr<ScriptSurface>(new ScriptSurface(cobject, true /* has reference */));
+}
+
+RefPtr<ScriptSurface>
+  ScriptSurface::create_for_target(const RefPtr<Script>& script,
+                                   const RefPtr<Surface>& target)
+{
+  cairo_surface_t* cobject =
+        cairo_script_surface_create_for_target(script->cobj(), target->cobj());
+  check_status_and_throw_exception(cairo_surface_status(cobject));
+  return RefPtr<ScriptSurface>(new ScriptSurface(cobject, true /* has reference */));
+}
+
+#endif // CAIRO_HAS_SCRIPT_SURFACE
+
+} //namespace Cairo
diff --git a/cairomm/script_surface.h b/cairomm/script_surface.h
new file mode 100644
index 0000000..ad73913
--- /dev/null
+++ b/cairomm/script_surface.h
@@ -0,0 +1,87 @@
+/* Copyright (C) 2014 The cairomm Development Team
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef __CAIROMM_SCRIPT_SURFACE_H
+#define __CAIROMM_SCRIPT_SURFACE_H
+
+#include <cairomm/surface.h>
+#include <cairomm/script.h>
+
+namespace Cairo {
+
+#ifdef CAIRO_HAS_SCRIPT_SURFACE
+
+/**
+ * The script surface provides the ability to render to a native script that
+ * matches the cairo drawing model. The scripts can be replayed using tools under
+ * the util/cairo-script directoriy, or with cairo-perf-trace.
+ *
+ * @since 1.12
+ */
+class ScriptSurface : public Surface {
+public:
+
+  /**
+   * Create a C++ wrapper for the C instance. This C++ instance should then be
+   * given to a RefPtr.
+   *
+   * @param cobject The C instance.
+   * @param has_reference whether we already have a reference. Otherwise, the
+   * constructor will take an extra reference.
+   *
+   * @since 1.12
+   */
+  explicit ScriptSurface(cairo_surface_t* cobject, bool has_reference = false);
+  virtual ~ScriptSurface();
+
+  /**
+   *  Create a new surface that will emit its rendering through script.
+   *
+   * Throws an exception on error.
+   *
+   * @param script The script (output device)
+   * @param content The content of the surface
+   * @param width Width in pixels
+   * @param height Height in pixels
+   *
+   * @since 1.12
+   */
+  static RefPtr<ScriptSurface> create(const RefPtr<Script>& script,
+                                      Content content, double width, double height);
+
+  /**
+   * Create a proxy surface that will render to target and record the operations
+   * to device.
+   *
+   * Throws an exception on error.
+   *
+   * @param script The script (output device)
+   * @param target A target surface to wrap
+   *
+   * @since 1.12
+   */
+  static RefPtr<ScriptSurface> create_for_target(const RefPtr<Script>& script,
+                                                 const RefPtr<Surface>& target);
+};
+
+#endif // CAIRO_HAS_SCRIPT_SURFACE
+
+} // namespace Cairo
+
+#endif //__CAIROMM_SCRIPT_SURFACE_H
+
diff --git a/cairomm/surface.cc b/cairomm/surface.cc
index 88e72cf..5697295 100644
--- a/cairomm/surface.cc
+++ b/cairomm/surface.cc
@@ -17,6 +17,7 @@
  */
 
 #include <cairomm/surface.h>
+#include <cairomm/script.h>
 #include <cairomm/private.h>
 
 namespace Cairo
@@ -246,7 +247,17 @@ RefPtr<Device> Surface::get_device()
   if (!d)
     return RefPtr<Device>();
 
-  return RefPtr<Device>(new Device(d, true));
+  cairo_surface_type_t surface_type = cairo_surface_get_type(m_cobject);
+  switch (surface_type)
+  {
+#if CAIRO_HAS_SCRIPT_SURFACE
+    case CAIRO_SURFACE_TYPE_SCRIPT:
+      return RefPtr<Script>(new Script(d, true /* has reference */));
+      break;
+#endif
+    default:
+      return RefPtr<Device>(new Device(d, true /* has reference */));
+  }
 }
 
 void Surface::reference() const
-- 
1.8.5.3