Game refactor [2/X]: Various moves (profilergraph, nodePlacementPrediction, create_formspec_menu)

* Move profilergraph to dedicated files
* Move nodePlacementPrediction to Game class
* Rename create_formspec_menu to GUIFormSpecMenu::create

5 files changed, 255 insertions, 0 deletions

diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index fa8ab0e6d..b52ea0349 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -10,5 +10,6 @@ set(gui_SRCS
 	${CMAKE_CURRENT_SOURCE_DIR}/guiTable.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/guiVolumeChange.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/intlGUIEditBox.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/profilergraph.cpp
 	PARENT_SCOPE
 )
diff --git a/src/gui/guiFormSpecMenu.cpp b/src/gui/guiFormSpecMenu.cpp
index a59143f77..4acc4b94a 100644
--- a/src/gui/guiFormSpecMenu.cpp
+++ b/src/gui/guiFormSpecMenu.cpp
@@ -57,6 +57,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #if USE_FREETYPE && IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 9
 #include "intlGUIEditBox.h"
+#include "mainmenumanager.h"
+
 #endif
 
 #define MY_CHECKPOS(a,b)													\
@@ -129,6 +131,28 @@ GUIFormSpecMenu::~GUIFormSpecMenu()
 	delete m_text_dst;
 }
 
+void GUIFormSpecMenu::create(GUIFormSpecMenu **cur_formspec, Client *client,
+	JoystickController *joystick, IFormSource *fs_src, TextDest *txt_dest)
+{
+	if (*cur_formspec == 0) {
+		*cur_formspec = new GUIFormSpecMenu(joystick, guiroot, -1, &g_menumgr,
+			client, client->getTextureSource(), fs_src, txt_dest);
+		(*cur_formspec)->doPause = false;
+
+		/*
+			Caution: do not call (*cur_formspec)->drop() here --
+			the reference might outlive the menu, so we will
+			periodically check if *cur_formspec is the only
+			remaining reference (i.e. the menu was removed)
+			and delete it in that case.
+		*/
+
+	} else {
+		(*cur_formspec)->setFormSource(fs_src);
+		(*cur_formspec)->setTextDest(txt_dest);
+	}
+}
+
 void GUIFormSpecMenu::removeChildren()
 {
 	const core::list<gui::IGUIElement*> &children = getChildren();
diff --git a/src/gui/guiFormSpecMenu.h b/src/gui/guiFormSpecMenu.h
index 071efb37f..9cd98f806 100644
--- a/src/gui/guiFormSpecMenu.h
+++ b/src/gui/guiFormSpecMenu.h
@@ -291,6 +291,9 @@ public:
 
 	~GUIFormSpecMenu();
 
+	static void create(GUIFormSpecMenu **cur_formspec, Client *client,
+		JoystickController *joystick, IFormSource *fs_src, TextDest *txt_dest);
+
 	void setFormSpec(const std::string &formspec_string,
 			const InventoryLocation &current_inventory_location)
 	{
diff --git a/src/gui/profilergraph.cpp b/src/gui/profilergraph.cpp
new file mode 100644
index 000000000..314796106
--- /dev/null
+++ b/src/gui/profilergraph.cpp
@@ -0,0 +1,169 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2018 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "profilergraph.h"
+#include "util/string.h"
+
+void ProfilerGraph::put(const Profiler::GraphValues &values)
+{
+	m_log.emplace_back(values);
+
+	while (m_log.size() > m_log_max_size)
+		m_log.erase(m_log.begin());
+}
+
+void ProfilerGraph::draw(s32 x_left, s32 y_bottom, video::IVideoDriver *driver,
+	gui::IGUIFont *font) const
+{
+	// Do *not* use UNORDERED_MAP here as the order needs
+	// to be the same for each call to prevent flickering
+	std::map<std::string, Meta> m_meta;
+
+	for (const Piece &piece : m_log) {
+		for (const auto &i : piece.values) {
+			const std::string &id = i.first;
+			const float &value = i.second;
+			std::map<std::string, Meta>::iterator j = m_meta.find(id);
+
+			if (j == m_meta.end()) {
+				m_meta[id] = Meta(value);
+				continue;
+			}
+
+			if (value < j->second.min)
+				j->second.min = value;
+
+			if (value > j->second.max)
+				j->second.max = value;
+		}
+	}
+
+	// Assign colors
+	static const video::SColor usable_colors[] = {
+		video::SColor(255, 255, 100, 100),
+		video::SColor(255, 90, 225, 90),
+		video::SColor(255, 100, 100, 255),
+		video::SColor(255, 255, 150, 50),
+		video::SColor(255, 220, 220, 100)
+	};
+	static const u32 usable_colors_count =
+		sizeof(usable_colors) / sizeof(*usable_colors);
+	u32 next_color_i = 0;
+
+	for (auto &i : m_meta) {
+		Meta &meta = i.second;
+		video::SColor color(255, 200, 200, 200);
+
+		if (next_color_i < usable_colors_count)
+			color = usable_colors[next_color_i++];
+
+		meta.color = color;
+	}
+
+	s32 graphh = 50;
+	s32 textx = x_left + m_log_max_size + 15;
+	s32 textx2 = textx + 200 - 15;
+	s32 meta_i = 0;
+
+	for (const auto &p: m_meta) {
+		const std::string &id = p.first;
+		const Meta &meta = p.second;
+		s32 x = x_left;
+		s32 y = y_bottom - meta_i * 50;
+		float show_min = meta.min;
+		float show_max = meta.max;
+
+		if (show_min >= -0.0001 && show_max >= -0.0001) {
+			if (show_min <= show_max * 0.5)
+				show_min = 0;
+		}
+
+		s32 texth = 15;
+		char buf[10];
+		snprintf(buf, 10, "%.3g", show_max);
+		font->draw(utf8_to_wide(buf).c_str(),
+			core::rect<s32>(textx, y - graphh,
+				textx2, y - graphh + texth),
+			meta.color);
+		snprintf(buf, 10, "%.3g", show_min);
+		font->draw(utf8_to_wide(buf).c_str(),
+			core::rect<s32>(textx, y - texth,
+				textx2, y),
+			meta.color);
+		font->draw(utf8_to_wide(id).c_str(),
+			core::rect<s32>(textx, y - graphh / 2 - texth / 2,
+				textx2, y - graphh / 2 + texth / 2),
+			meta.color);
+		s32 graph1y = y;
+		s32 graph1h = graphh;
+		bool relativegraph = (show_min != 0 && show_min != show_max);
+		float lastscaledvalue = 0.0;
+		bool lastscaledvalue_exists = false;
+
+		for (const Piece &piece : m_log) {
+			float value = 0;
+			bool value_exists = false;
+			Profiler::GraphValues::const_iterator k =
+				piece.values.find(id);
+
+			if (k != piece.values.end()) {
+				value = k->second;
+				value_exists = true;
+			}
+
+			if (!value_exists) {
+				x++;
+				lastscaledvalue_exists = false;
+				continue;
+			}
+
+			float scaledvalue = 1.0;
+
+			if (show_max != show_min)
+				scaledvalue = (value - show_min) / (show_max - show_min);
+
+			if (scaledvalue == 1.0 && value == 0) {
+				x++;
+				lastscaledvalue_exists = false;
+				continue;
+			}
+
+			if (relativegraph) {
+				if (lastscaledvalue_exists) {
+					s32 ivalue1 = lastscaledvalue * graph1h;
+					s32 ivalue2 = scaledvalue * graph1h;
+					driver->draw2DLine(v2s32(x - 1, graph1y - ivalue1),
+						v2s32(x, graph1y - ivalue2), meta.color);
+				}
+
+				lastscaledvalue = scaledvalue;
+				lastscaledvalue_exists = true;
+			} else {
+				s32 ivalue = scaledvalue * graph1h;
+				driver->draw2DLine(v2s32(x, graph1y),
+					v2s32(x, graph1y - ivalue), meta.color);
+			}
+
+			x++;
+		}
+
+		meta_i++;
+	}
+}
diff --git a/src/gui/profilergraph.h b/src/gui/profilergraph.h
new file mode 100644
index 000000000..9f2c87853
--- /dev/null
+++ b/src/gui/profilergraph.h
@@ -0,0 +1,58 @@
+/*
+Minetest
+Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include <SColor.h>
+#include <deque>
+#include <utility>
+#include <IGUIFont.h>
+#include <IVideoDriver.h>
+#include "profiler.h"
+
+/* Profiler display */
+class ProfilerGraph
+{
+private:
+	struct Piece {
+		Piece(Profiler::GraphValues v) : values(std::move(v)) {}
+		Profiler::GraphValues values;
+	};
+	struct Meta {
+		float min;
+		float max;
+		video::SColor color;
+		Meta(float initial = 0,
+			video::SColor color = video::SColor(255, 255, 255, 255)):
+			min(initial),
+			max(initial),
+			color(color)
+		{}
+	};
+	std::deque<Piece> m_log;
+public:
+	u32 m_log_max_size = 200;
+
+	ProfilerGraph() = default;
+
+	void put(const Profiler::GraphValues &values);
+
+	void draw(s32 x_left, s32 y_bottom, video::IVideoDriver *driver,
+		gui::IGUIFont *font) const;
+};