builtin/builtin.lua


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--
-- This file contains built-in stuff in Minetest implemented in Lua.
--
-- It is always loaded and executed after registration of the C API,
-- before loading and running any mods.
--

-- Initialize some very basic things
print = minetest.debug
math.randomseed(os.time())
os.setlocale("C", "numeric")

-- Load other files
dofile(minetest.get_modpath("__builtin").."/serialize.lua")
dofile(minetest.get_modpath("__builtin").."/misc_helpers.lua")
dofile(minetest.get_modpath("__builtin").."/item.lua")
dofile(minetest.get_modpath("__builtin").."/misc_register.lua")
dofile(minetest.get_modpath("__builtin").."/item_entity.lua")
dofile(minetest.get_modpath("__builtin").."/deprecated.lua")
dofile(minetest.get_modpath("__builtin").."/misc.lua")
dofile(minetest.get_modpath("__builtin").."/privileges.lua")
dofile(minetest.get_modpath("__builtin").."/auth.lua")
dofile(minetest.get_modpath("__builtin").."/chatcommands.lua")
dofile(minetest.get_modpath("__builtin").."/static_spawn.lua")
dofile(minetest.get_modpath("__builtin").."/detached_inventory.lua")
dofile(minetest.get_modpath("__builtin").."/falling.lua")
/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2010-2013 blue42u, Jonathon Anderson <anderjon@umail.iu.edu>
Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>

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 "hud.h"
#include "settings.h"
#include "util/numeric.h"
#include "util/string.h"
#include "log.h"
#include "gamedef.h"
#include "itemdef.h"
#include "inventory.h"
#include "client/tile.h"
#include "localplayer.h"
#include "camera.h"
#include "porting.h"
#include "fontengine.h"
#include "guiscalingfilter.h"
#include "mesh.h"
#include <IGUIStaticText.h>

#ifdef HAVE_TOUCHSCREENGUI
#include "touchscreengui.h"
#endif

Hud::Hud(video::IVideoDriver *driver, scene::ISceneManager* smgr,
		gui::IGUIEnvironment* guienv, IGameDef *gamedef, LocalPlayer *player,
		Inventory *inventory)
{
	this->driver      = driver;
	this->smgr        = smgr;
	this->guienv      = guienv;
	this->gamedef     = gamedef;
	this->player      = player;
	this->inventory   = inventory;

	m_hud_scaling      = g_settings->getFloat("hud_scaling");
	m_screensize       = v2u32(0, 0);
	m_displaycenter    = v2s32(0, 0);
	m_hotbar_imagesize = floor(HOTBAR_IMAGE_SIZE * porting::getDisplayDensity() + 0.5);
	m_hotbar_imagesize *= m_hud_scaling;
	m_padding = m_hotbar_imagesize / 12;

	for (unsigned int i = 0; i < 4; i++)
		hbar_colors[i] = video::SColor(255, 255, 255, 255);

	tsrc = gamedef->getTextureSource();

	v3f crosshair_color = g_settings->getV3F("crosshair_color");
	u32 cross_r = rangelim(myround(crosshair_color.X), 0, 255);
	u32 cross_g = rangelim(myround(crosshair_color.Y), 0, 255);
	u32 cross_b = rangelim(myround(crosshair_color.Z), 0, 255);
	u32 cross_a = rangelim(g_settings->getS32("crosshair_alpha"), 0, 255);
	crosshair_argb = video::SColor(cross_a, cross_r, cross_g, cross_b);

	v3f selectionbox_color = g_settings->getV3F("selectionbox_color");
	u32 sbox_r = rangelim(myround(selectionbox_color.X), 0, 255);
	u32 sbox_g = rangelim(myround(selectionbox_color.Y), 0, 255);
	u32 sbox_b = rangelim(myround(selectionbox_color.Z), 0, 255);
	selectionbox_argb = video::SColor(255, sbox_r, sbox_g, sbox_b);

	use_crosshair_image = tsrc->isKnownSourceImage("crosshair.png");

	hotbar_image = "";
	use_hotbar_image = false;
	hotbar_selected_image = "";
	use_hotbar_selected_image = false;

	m_selection_mesh = NULL;
	m_selection_boxes.clear();
	m_halo_boxes.clear();

	m_selection_pos = v3f(0.0, 0.0, 0.0);
	std::string mode = g_settings->get("node_highlighting");
	m_selection_material.Lighting = false;

	if (g_settings->getBool("enable_shaders")) {
		IShaderSource *shdrsrc = gamedef->getShaderSource();
		u16 shader_id = shdrsrc->getShader(
			mode == "halo" ? "selection_shader" : "default_shader", 1, 1);
		m_selection_material.MaterialType = shdrsrc->getShaderInfo(shader_id).material;
	} else {
		m_selection_material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
	}

	if (mode == "box") {
		m_use_selection_mesh = false;
		m_selection_material.Thickness =
			rangelim(g_settings->getS16("selectionbox_width"), 1, 5);
	} else if (mode == "halo") {
		m_use_selection_mesh = true;
		m_selection_material.setTexture(0, tsrc->getTextureForMesh("halo.png"));
		m_selection_material.setFlag(video::EMF_BACK_FACE_CULLING, true);
	} else {
		m_selection_material.MaterialType = video::EMT_SOLID;
	}
}

Hud::~Hud()
{
	if (m_selection_mesh)
		m_selection_mesh->drop();
}

void Hud::drawItem(const ItemStack &item, const core::rect<s32>& rect,
		bool selected)
{
	if (selected) {
			/* draw hihlighting around selected item */
			if (use_hotbar_selected_image) {
				core::rect<s32> imgrect2 = rect;
				imgrect2.UpperLeftCorner.X  -= (m_padding*2);
				imgrect2.UpperLeftCorner.Y  -= (m_padding*2);
				imgrect2.LowerRightCorner.X += (m_padding*2);
				imgrect2.LowerRightCorner.Y += (m_padding*2);
					video::ITexture *texture = tsrc->getTexture(hotbar_selected_image);
					core::dimension2di imgsize(texture->getOriginalSize());
				draw2DImageFilterScaled(driver, texture, imgrect2,
						core::rect<s32>(core::position2d<s32>(0,0), imgsize),
						NULL, hbar_colors, true);
			} else {
				video::SColor c_outside(255,255,0,0);
				//video::SColor c_outside(255,0,0,0);
				//video::SColor c_inside(255,192,192,192);
				s32 x1 = rect.UpperLeftCorner.X;
				s32 y1 = rect.UpperLeftCorner.Y;
				s32 x2 = rect.LowerRightCorner.X;
				s32 y2 = rect.LowerRightCorner.Y;
				// Black base borders
				driver->draw2DRectangle(c_outside,
					core::rect<s32>(
					v2s32(x1 - m_padding, y1 - m_padding),
					v2s32(x2 + m_padding, y1)
					), NULL);
				driver->draw2DRectangle(c_outside,
					core::rect<s32>(
					v2s32(x1 - m_padding, y2),
					v2s32(x2 + m_padding, y2 + m_padding)
					), NULL);
				driver->draw2DRectangle(c_outside,
					core::rect<s32>(
					v2s32(x1 - m_padding, y1),
						v2s32(x1, y2)
					), NULL);
				driver->draw2DRectangle(c_outside,
					core::rect<s32>(
						v2s32(x2, y1),
					v2s32(x2 + m_padding, y2)
					), NULL);
				/*// Light inside borders
				driver->draw2DRectangle(c_inside,
					core::rect<s32>(
						v2s32(x1 - padding/2, y1 - padding/2),
						v2s32(x2 + padding/2, y1)
					), NULL);
				driver->draw2DRectangle(c_inside,
					core::rect<s32>(
						v2s32(x1 - padding/2, y2),
						v2s32(x2 + padding/2, y2 + padding/2)
					), NULL);
				driver->draw2DRectangle(c_inside,
					core::rect<s32>(
						v2s32(x1 - padding/2, y1),
						v2s32(x1, y2)
					), NULL);
				driver->draw2DRectangle(c_inside,
					core::rect<s32>(
						v2s32(x2, y1),
						v2s32(x2 + padding/2, y2)
					), NULL);
				*/
			}
		}

		video::SColor bgcolor2(128, 0, 0, 0);
		if (!use_hotbar_image)
			driver->draw2DRectangle(bgcolor2, rect, NULL);
		drawItemStack(driver, g_fontengine->getFont(), item, rect, NULL,
			gamedef, selected ? IT_ROT_SELECTED : IT_ROT_NONE);
	}

//NOTE: selectitem = 0 -> no selected; selectitem 1-based
void Hud::drawItems(v2s32 upperleftpos, v2s32 screen_offset, s32 itemcount,
		s32 inv_offset, InventoryList *mainlist, u16 selectitem, u16 direction)
{
#ifdef HAVE_TOUCHSCREENGUI
	if (g_touchscreengui && inv_offset == 0)
		g_touchscreengui->resetHud();
#endif

	s32 height  = m_hotbar_imagesize + m_padding * 2;
	s32 width   = (itemcount - inv_offset) * (m_hotbar_imagesize + m_padding * 2);

	if (direction == HUD_DIR_TOP_BOTTOM || direction == HUD_DIR_BOTTOM_TOP) {
		s32 tmp = height;
		height = width;
		width = tmp;
	}

	// Position of upper left corner of bar
	v2s32 pos = screen_offset;
	pos.X *= m_hud_scaling * porting::getDisplayDensity();
	pos.Y *= m_hud_scaling * porting::getDisplayDensity();
	pos += upperleftpos;

	// Store hotbar_image in member variable, used by drawItem()
	if (hotbar_image != player->hotbar_image) {
		hotbar_image = player->hotbar_image;
		if (hotbar_image != "")
			use_hotbar_image = tsrc->isKnownSourceImage(hotbar_image);
		else
			use_hotbar_image = false;
	}

	// Store hotbar_selected_image in member variable, used by drawItem()
	if (hotbar_selected_image != player->hotbar_selected_image) {
		hotbar_selected_image = player->hotbar_selected_image;
		if (hotbar_selected_image != "")
			use_hotbar_selected_image = tsrc->isKnownSourceImage(hotbar_selected_image);
		else
			use_hotbar_selected_image = false;
	}

	// draw customized item background
	if (use_hotbar_image) {
		core::rect<s32> imgrect2(-m_padding/2, -m_padding/2,
			width+m_padding/2, height+m_padding/2);
		core::rect<s32> rect2 = imgrect2 + pos;
		video::ITexture *texture = tsrc->getTexture(hotbar_image);
		core::dimension2di imgsize(texture->getOriginalSize());
		draw2DImageFilterScaled(driver, texture, rect2,
			core::rect<s32>(core::position2d<s32>(0,0), imgsize),
			NULL, hbar_colors, true);
	}

	// Draw items
	core::rect<s32> imgrect(0, 0, m_hotbar_imagesize, m_hotbar_imagesize);
	for (s32 i = inv_offset; i < itemcount && (size_t)i < mainlist->getSize(); i++) {
		s32 fullimglen = m_hotbar_imagesize + m_padding * 2;

		v2s32 steppos;
		switch (direction) {
		case HUD_DIR_RIGHT_LEFT:
			steppos = v2s32(-(m_padding + (i - inv_offset) * fullimglen), m_padding);
			break;
		case HUD_DIR_TOP_BOTTOM:
			steppos = v2s32(m_padding, m_padding + (i - inv_offset) * fullimglen);
			break;
		case HUD_DIR_BOTTOM_TOP:
			steppos = v2s32(m_padding, -(m_padding + (i - inv_offset) * fullimglen));
			break;
		default:
			steppos = v2s32(m_padding + (i - inv_offset) * fullimglen, m_padding);
			break;
		}

		drawItem(mainlist->getItem(i), (imgrect + pos + steppos), (i + 1) == selectitem);

#ifdef HAVE_TOUCHSCREENGUI
		if (g_touchscreengui)
			g_touchscreengui->registerHudItem(i, (imgrect + pos + steppos));
#endif
	}
}


void Hud::drawLuaElements(const v3s16 &camera_offset)
{
	u32 text_height = g_fontengine->getTextHeight();
	irr::gui::IGUIFont* font = g_fontengine->getFont();
	for (size_t i = 0; i != player->maxHudId(); i++) {
		HudElement *e = player->getHud(i);
		if (!e)
			continue;

		v2s32 pos(floor(e->pos.X * (float) m_screensize.X + 0.5),
				floor(e->pos.Y * (float) m_screensize.Y + 0.5));
		switch (e->type) {
			case HUD_ELEM_IMAGE: {
				video::ITexture *texture = tsrc->getTexture(e->text);
				if (!texture)
					continue;

				const video::SColor color(255, 255, 255, 255);
				const video::SColor colors[] = {color, color, color, color};
				core::dimension2di imgsize(texture->getOriginalSize());
				v2s32 dstsize(imgsize.Width * e->scale.X,
				              imgsize.Height * e->scale.Y);
				if (e->scale.X < 0)
					dstsize.X = m_screensize.X * (e->scale.X * -0.01);
				if (e->scale.Y < 0)
					dstsize.Y = m_screensize.Y * (e->scale.Y * -0.01);
				v2s32 offset((e->align.X - 1.0) * dstsize.X / 2,
				             (e->align.Y - 1.0) * dstsize.Y / 2);
				core::rect<s32> rect(0, 0, dstsize.X, dstsize.Y);
				rect += pos + offset + v2s32(e->offset.X, e->offset.Y);
				draw2DImageFilterScaled(driver, texture, rect,
					core::rect<s32>(core::position2d<s32>(0,0), imgsize),
					NULL, colors, true);
				break; }
			case HUD_ELEM_TEXT: {
				video::SColor color(255, (e->number >> 16) & 0xFF,
										 (e->number >> 8)  & 0xFF,
										 (e->number >> 0)  & 0xFF);