src/client/render/interlaced.cpp


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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2017 numzero, Lobachevskiy Vitaliy <numzer0@yandex.ru>

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 "interlaced.h"
#include "client/client.h"
#include "client/shader.h"
#include "client/tile.h"

RenderingCoreInterlaced::RenderingCoreInterlaced(
	IrrlichtDevice *_device, Client *_client, Hud *_hud)
	: RenderingCoreStereo(_device, _client, _hud)
{
	initMaterial();
}

void RenderingCoreInterlaced::initMaterial()
{
	IShaderSource *s = client->getShaderSource();
	mat.UseMipMaps = false;
	mat.ZBuffer = false;
	mat.ZWriteEnable = false;
	u32 shader = s->getShader("3d_interlaced_merge", TILE_MATERIAL_BASIC, 0);
	mat.MaterialType = s->getShaderInfo(shader).material;
	for (int k = 0; k < 3; ++k) {
		mat.TextureLayer[k].AnisotropicFilter = false;
		mat.TextureLayer[k].BilinearFilter = false;
		mat.TextureLayer[k].TrilinearFilter = false;
		mat.TextureLayer[k].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
		mat.TextureLayer[k].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
	}
}

void RenderingCoreInterlaced::initTextures()
{
	v2u32 image_size{screensize.X, screensize.Y / 2};
	left = driver->addRenderTargetTexture(
			image_size, "3d_render_left", video::ECF_A8R8G8B8);
	right = driver->addRenderTargetTexture(
			image_size, "3d_render_right", video::ECF_A8R8G8B8);
	mask = driver->addTexture(screensize, "3d_render_mask", video::ECF_A8R8G8B8);
	initMask();
	mat.TextureLayer[0].Texture = left;
	mat.TextureLayer[1].Texture = right;
	mat.TextureLayer[2].Texture = mask;
}

void RenderingCoreInterlaced::clearTextures()
{
	driver->removeTexture(left);
	driver->removeTexture(right);
	driver->removeTexture(mask);
}

void RenderingCoreInterlaced::initMask()
{
	u8 *data = reinterpret_cast<u8 *>(mask->lock());
	for (u32 j = 0; j < screensize.Y; j++) {
		u8 val = j % 2 ? 0xff : 0x00;
		memset(data, val, 4 * screensize.X);
		data += 4 * screensize.X;
	}
	mask->unlock();
}

void RenderingCoreInterlaced::drawAll()
{
	renderBothImages();
	merge();
	drawHUD();
}

void RenderingCoreInterlaced::merge()
{
	static const video::S3DVertex vertices[4] = {
			video::S3DVertex(1.0, -1.0, 0.0, 0.0, 0.0, -1.0,
					video::SColor(255, 0, 255, 255), 1.0, 0.0),
			video::S3DVertex(-1.0, -1.0, 0.0, 0.0, 0.0, -1.0,
					video::SColor(255, 255, 0, 255), 0.0, 0.0),
			video::S3DVertex(-1.0, 1.0, 0.0, 0.0, 0.0, -1.0,
					video::SColor(255, 255, 255, 0), 0.0, 1.0),
			video::S3DVertex(1.0, 1.0, 0.0, 0.0, 0.0, -1.0,
					video::SColor(255, 255, 255, 255), 1.0, 1.0),
	};
	static const u16 indices[6] = {0, 1, 2, 2, 3, 0};
	driver->setMaterial(mat);
	driver->drawVertexPrimitiveList(&vertices, 4, &indices, 2);
}

void RenderingCoreInterlaced::useEye(bool _right)
{
	driver->setRenderTarget(_right ? right : left, true, true, skycolor);
	RenderingCoreStereo::useEye(_right);
}

void RenderingCoreInterlaced::resetEye()
{
	driver->setRenderTarget(nullptr, false, false, skycolor);
	RenderingCoreStereo::resetEye();
}
--Minetest
--Copyright (C) 2015 PilzAdam
--
--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.

local FILENAME = "settingtypes.txt"

local CHAR_CLASSES = {
	SPACE = "[%s]",
	VARIABLE = "[%w_%-%.]",
	INTEGER = "[+-]?[%d]",
	FLOAT = "[+-]?[%d%.]",
	FLAGS = "[%w_%-%.,]",
}

local function flags_to_table(flags)
	return flags:gsub("%s+", ""):split(",", true) -- Remove all spaces and split
end

-- returns error message, or nil
local function parse_setting_line(settings, line, read_all, base_level, allow_secure)

	-- strip carriage returns (CR, /r)
	line = line:gsub("\r", "")

	-- comment
	local comment = line:match("^#" .. CHAR_CLASSES.SPACE .. "*(.*)$")
	if comment then
		if settings.current_comment == "" then
			settings.current_comment = comment
		else
			settings.current_comment = settings.current_comment .. "\n" .. comment
		end
		return
	end

	-- clear current_comment so only comments directly above a setting are bound to it
	-- but keep a local reference to it for variables in the current line
	local current_comment = settings.current_comment
	settings.current_comment = ""

	-- empty lines
	if line:match("^" .. CHAR_CLASSES.SPACE .. "*$") then
		return
	end

	-- category
	local stars, category = line:match("^%[([%*]*)([^%]]+)%]$")
	if category then
		table.insert(settings, {
			name = category,
			level = stars:len() + base_level,
			type = "category",
		})
		return
	end

	-- settings
	local first_part, name, readable_name, setting_type = line:match("^"
			-- this first capture group matches the whole first part,
			--  so we can later strip it from the rest of the line
			.. "("
				.. "([" .. CHAR_CLASSES.VARIABLE .. "+)" -- variable name
				.. CHAR_CLASSES.SPACE .. "*"
				.. "%(([^%)]*)%)"  -- readable name
				.. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.VARIABLE .. "+)" -- type
				.. CHAR_CLASSES.SPACE .. "*"
			.. ")")

	if not first_part then
		return "Invalid line"
	end

	if name:match("secure%.[.]*") and not allow_secure then
		return "Tried to add \"secure.\" setting"
	end

	if readable_name == "" then
		readable_name = nil
	end
	local remaining_line = line:sub(first_part:len() + 1)

	if setting_type == "int" then
		local default, min, max = remaining_line:match("^"
				-- first int is required, the last 2 are optional
				.. "(" .. CHAR_CLASSES.INTEGER .. "+)" .. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.INTEGER .. "*)" .. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.INTEGER .. "*)"
				.. "$")

		if not default or not tonumber(default) then
			return "Invalid integer setting"
		end

		min = tonumber(min)
		max = tonumber(max)
		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = "int",
			default = default,
			min = min,
			max = max,
			comment = current_comment,
		})
		return
	end

	if setting_type == "string"
			or setting_type == "key" or setting_type == "v3f" then
		local default = remaining_line:match("^(.*)$")

		if not default then
			return "Invalid string setting"
		end
		if setting_type == "key" and not read_all then
			-- ignore key type if read_all is false
			return
		end

		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = setting_type,
			default = default,
			comment = current_comment,
		})
		return
	end

	if setting_type == "noise_params_2d"
			or setting_type == "noise_params_3d" then
		local default = remaining_line:match("^(.*)$")

		if not default then
			return "Invalid string setting"
		end

		local values = {}
		local ti = 1
		local index = 1
		for match in default:gmatch("[+-]?[%d.-e]+") do -- All numeric characters
			index = default:find("[+-]?[%d.-e]+", index) + match:len()
			table.insert(values, match)
			ti = ti + 1
			if ti > 9 then
				break
			end
		end
		index = default:find("[^, ]", index)
		local flags = ""
		if index then
			flags = default:sub(index)
			default = default:sub(1, index - 3) -- Make sure no flags in single-line format
		end
		table.insert(values, flags)

		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = setting_type,
			default = default,
			default_table = {
				offset = values[1],
				scale = values[2],
				spread = {
					x = values[3],
					y = values[4],
					z = values[5]
				},
				seed = values[6],
				octaves = values[7],
				persistence = values[8],
				lacunarity = values[9],
				flags = values[10]
			},
			values = values,
			comment = current_comment,
			noise_params = true,
			flags = flags_to_table("defaults,eased,absvalue")
		})
		return
	end

	if setting_type == "bool" then
		if remaining_line ~= "false" and remaining_line ~= "true" then
			return "Invalid boolean setting"
		end

		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = "bool",
			default = remaining_line,
			comment = current_comment,
		})
		return
	end

	if setting_type == "float" then
		local default, min, max = remaining_line:match("^"
				-- first float is required, the last 2 are optional
				.. "(" .. CHAR_CLASSES.FLOAT .. "+)" .. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.FLOAT .. "*)" .. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.FLOAT .. "*)"
				.."$")

		if not default or not tonumber(default) then
			return "Invalid float setting"
		end

		min = tonumber(min)
		max = tonumber(max)
		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = "float",
			default = default,
			min = min,
			max = max,
			comment = current_comment,
		})
		return
	end

	if setting_type == "enum" then
		local default, values = remaining_line:match("^"
				-- first value (default) may be empty (i.e. is optional)
				.. "(" .. CHAR_CLASSES.VARIABLE .. "*)" .. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.FLAGS .. "+)"
				.. "$")

		if not default or values == "" then
			return "Invalid enum setting"
		end

		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = "enum",
			default = default,
			values = values:split(",", true),
			comment = current_comment,
		})
		return
	end

	if setting_type == "path" or setting_type == "filepath" then
		local default = remaining_line:match("^(.*)$")

		if not default then
			return "Invalid path setting"
		end

		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = setting_type,
			default = default,
			comment = current_comment,
		})
		return
	end

	if setting_type == "flags" then
		local default, possible = remaining_line:match("^"
				-- first value (default) may be empty (i.e. is optional)
				-- this is implemented by making the last value optional, and
				-- swapping them around if it turns out empty.
				.. "(" .. CHAR_CLASSES.FLAGS .. "+)" .. CHAR_CLASSES.SPACE .. "*"
				.. "(" .. CHAR_CLASSES.FLAGS .. "*)"
				.. "$")

		if not default or not possible then
			return "Invalid flags setting"
		end

		if possible == "" then
			possible = default
			default = ""
		end

		table.insert(settings, {
			name = name,
			readable_name = readable_name,
			type = "flags",
			default = default,
			possible = flags_to_table(possible),
			comment = current_comment,
		})
		return
	end

	return "Invalid setting type \"" .. setting_type .. "\""
end

local function parse_single_file(file, filepath, read_all, result, base_level, allow_secure)
	-- store this helper variable in the table so it's easier to pass to parse_setting_line()
	result.current_comment = ""

	local line = file:read("*line")
	while line do
		local error_msg = parse_setting_line(result, line, read_all, base_level, allow_secure)
		if error_msg then
			core.log("error", error_msg .. " in " .. filepath .. " \"" .. line .. "\"")
		end
		line = file:read("*line")
	end

	result.current_comment = nil
end

-- read_all: whether to ignore certain setting types for GUI or not
-- parse_mods: whether to parse settingtypes.txt in mods and games
local function parse_config_file(read_all, parse_mods)
	local settings = {}

	do
		local builtin_path = core.get_builtin_path() .. FILENAME
		local file = io.open(builtin_path, "r")
		if not file then
			core.log("error", "Can't load " .. FILENAME)
			return settings
		end

		parse_single_file(file, builtin_path, read_all, settings, 0, true)

		file:close()
	end

	if parse_mods then
		-- Parse games
		local games_category_initialized = false
		local index = 1
		local game = pkgmgr.get_game(index)
		while game do
			local path = game.path .. DIR_DELIM .. FILENAME
			local file = io.open(path, "r")
			if file then
				if not games_category_initialized then
					fgettext_ne("Games") -- not used, but needed for xgettext
					table.insert(settings, {
						name = "Games",
						level = 0,
						type = "category",
					})
					games_category_initialized = true
				end

				table.insert(settings, {
					name = game.name,
					level = 1,
					type = "category",
				})

				parse_single_file(file, path, read_all, settings, 2, false)

				file:close()
			end

			index = index + 1
			game = pkgmgr.get_game(index)
		end

		-- Parse mods
		local mods_category_initialized = false
		local mods = {}
		get_mods(core.get_modpath(), "mods", mods)
		for _, mod in ipairs(mods) do
			local path = mod.path .. DIR_DELIM .. FILENAME
			local file = io.open(path, "r")
			if file then
				if not mods_category_initialized then
					fgettext_ne("Mods") -- not used, but needed for xgettext
					table.insert(settings, {
						name = "Mods",
						level = 0,
						type = "category",
					})
					mods_category_initialized = true
				end

				table.insert(settings, {
					name = mod.name,
					level = 1,
					type = "category",
				})

				parse_single_file(file, path, read_all, settings, 2, false)

				file:close()
			end
		end
	end

	return settings
end

local function filter_settings(settings, searchstring)
	if not searchstring or searchstring == "" then
		return settings, -1
	end

	-- Setup the keyword list
	local keywords = {}
	for word in searchstring:lower():gmatch("%S+") do
		table.insert(keywords, word)
	end

	local result = {}
	local category_stack = {}
	local current_level = 0
	local best_setting = nil
	for _, entry in pairs(settings) do
		if entry.type == "category" then
			-- Remove all settingless categories
			while #category_stack > 0 and entry.level <= current_level do
				table.remove(category_stack, #category_stack)
				if #category_stack > 0 then
					current_level = category_stack[#category_stack].level
				else
					current_level = 0
				end
			end

			-- Push category onto stack
			category_stack[#category_stack + 1] = entry
			current_level = entry.level
		else
			-- See if setting matches keywords
			local setting_score = 0
			for k = 1, #keywords do
				local keyword = keywords[k]

				if string.find(entry.name:lower(), keyword, 1, true) then
					setting_score = setting_score + 1
				end

				if entry.readable_name and
						string.find(fgettext(entry.readable_name):lower(), keyword, 1, true) then
					setting_score = setting_score + 1
				end

				if entry.comment and
						string.find(fgettext_ne(entry.comment):lower(), keyword, 1, true) then
					setting_score = setting_score + 1
				end
			end

			-- Add setting to results if match
			if setting_score > 0 then
				-- Add parent categories
				for _, category in pairs(category_stack) do
					result[#result + 1] = category
				end
				category_stack = {}

				-- Add setting
				result[#result + 1] = entry
				entry.score = setting_score

				if not best_setting or
						setting_score > result[best_setting].score then
					best_setting = #result
				end
			end
		end
	end
	return result, best_setting or -1
end

local full_settings = parse_config_file(false, true)
local search_string = ""
local settings = full_settings
local selected_setting = 1

local function get_current_value(setting)
	local value = core.settings:get(setting.name)
	if value == nil then
		value = setting.default
	end
	return value
end

local function get_current_np_group(setting)
	local value = core.settings:get_np_group(setting.name)
	if value == nil then
		return setting.values
	end
	local p = "%g"
	return {
		p:format(value.offset),
		p:format(value.scale),
		p:format(value.spread.x),
		p:format(value.spread.y),
		p:format(value.spread.z),
		p:format(value.seed),
		p:format(value.octaves),
		p:format(value.persistence),
		p:format(value.lacunarity),
		value.flags
	}
end

local function get_current_np_group_as_string(setting)
	local value = core.settings:get_np_group(setting.name)
	if value == nil then
		return setting.default
	end
	return ("%g, %g, (%g, %g, %g), %g, %g, %g, %g"):format(
		value.offset,
		value.scale,
		value.spread.x,
		value.spread.y,
		value.spread.z,
		value.seed,
		value.octaves,
		value.persistence,
		value.lacunarity
	) .. (value.flags ~= "" and (", " .. value.flags) or "")
end

local checkboxes = {} -- handle checkboxes events

local function create_change_setting_formspec(dialogdata)
	local setting = settings[selected_setting]
	-- Final formspec will be created at the end of this function
	-- Default values below, may be changed depending on setting type
	local width = 10
	local height = 3.5
	local description_height = 3
	local formspec = ""

	-- Setting-specific formspec elements
	if setting.type == "bool" then
		local selected_index = 1
		if core.is_yes(get_current_value(setting)) then
			selected_index = 2
		end
		formspec = "dropdown[3," .. height .. ";4,1;dd_setting_value;"
				.. fgettext("Disabled") .. "," .. fgettext("Enabled") .. ";"
				.. selected_index .. "]"
		height = height + 1.25

	elseif setting.type == "enum" then
		local selected_index = 0
		formspec = "dropdown[3," .. height .. ";4,1;dd_setting_value;"
		for index, value in ipairs(setting.values) do
			-- translating value is not possible, since it's the value
			--  that we set the setting to
			formspec = formspec ..  core.formspec_escape(value) .. ","
			if get_current_value(setting) == value then
				selected_index = index
			end
		end
		if #setting.values > 0 then
			formspec = formspec:sub(1, -2) -- remove trailing comma
		end
		formspec = formspec .. ";" .. selected_index .. "]"
		height = height + 1.25

	elseif setting.type == "path" or setting.type == "filepath" then
		local current_value = dialogdata.selected_path
		if not current_value then
			current_value = get_current_value(setting)
		end
		formspec = "field[0.28," .. height + 0.15 .. ";8,1;te_setting_value;;"
				.. core.formspec_escape(current_value) .. "]"
				.. "button[8," .. height - 0.15 .. ";2,1;btn_browser_"
				.. setting.type .. ";" .. fgettext("Browse") .. "]"
		height = height + 1.15

	elseif setting.type == "noise_params_2d" or setting.type == "noise_params_3d" then
		local t = get_current_np_group(setting)
		local dimension = 3
		if setting.type == "noise_params_2d" then
			dimension = 2
		end

		-- More space for 3x3 fields
		description_height = description_height - 1.5
		height = height - 1.5

		local fields = {}
		local function add_field(x, name, label, value)
			fields[#fields + 1] = ("field[%f,%f;3.3,1;%s;%s;%s]"):format(
				x, height, name, label, core.formspec_escape(value or "")
			)
		end
		-- First row
		height = height + 0.3