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Creation of Font class and code update accordingly
This commit is contained in:
Pierre-Yves Rollo
parent
4bfc237ddc
commit
52973fbd84
133
API.md
133
API.md
@ -4,65 +4,52 @@ This document describes Font Lib API. Font Lib creates textures for font display
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## Settings
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### default_font
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Name of the font to be used when no font is given. The font should be registered.
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If no default\_font given or if default\_font given but not registered, the first registered font will be used as default.
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## Provided methods
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### get\_text\_size
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**font\_lib.get\_text\_size(font\_name, text)**
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Computes size for a given font and text
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### font_api.get_default_font_name()
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Returns de default font name.
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**font\_name**: Font name of registered font to use
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**text**: Text to be rendered
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**Returns**: rendered text width, height
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###font_api.register_font(font_name, font_def)
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Register a new font.
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**font_name**: Name of the font to register. If registering different sizes of the same font, add size in the font name (e.g. times_10, times_12...).
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**font_def**: Font definition table (see **Font definition table** below).
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### make\_line\_texture
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**font\_lib.make\_line\_texture(font\_name, text, width, x, y)**
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###font_api.on_display_update(pos, objref)
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Standard on_display_update entity callback.
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Builds texture part for a text line
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**pos**: Node position
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**font\_name**: Font name of registered font to use
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**text**: Text to be rendered
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**texturew**: Width of the texture (extra text is not rendered)
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**x**: Starting x position in texture
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**y**: Vertical position of the line in texture
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**Returns**: Texture string
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**objref**: Object reference of entity
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### make\_multiline\_texture
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**font\_lib.make\_multiline\_texture(font\_name, text, width, height, maxlines, halign, valign, color)**
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Node should have a corresponding display_entity with size, resolution and maxlines fields and optionally halign, valign and color fields.
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Builds texture for a multiline colored text
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###Font definition table
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Font definition table used by **font_api.register_font** and **font\_api.Font:new** may/can contain following elements:
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**font\_name**: Font name of registered font to use
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**text**: Text to be rendered
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**texturew**: Width of the texture (extra text will be truncated)
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**textureh**: Height of the texture
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**maxlines**: Maximum number of lines
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**halign**: Horizontal text align ("left", "right" or "center") (optional)
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**valign**: Vertical text align ("top", "bottom" or "center") (optional)
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**color**: Color of the text (optional)
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**Returns**: Texture string
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* **height** (required): Font height in pixels (all font textures should have the same height) .
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* **widths** (required): Array of character widths in pixels, indexed by UTF codepoints.
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* **margintop** (optional): Margin (in texture pixels) added on top of each char texture.
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* **marginbottom** (optional): Margin (in texture pixels) added at bottom of each char texture.
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* **linespacing** (optional): Spacing (in texture pixels) between each lines.
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### register\_font
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**font\_lib.register_font(font\_name, height, widths)**
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Registers a new font in font_api.
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**font\_name**: Name of the font to register (this name will be used to address the font later)
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If registering different sizes of the same font, add size in the font name (e.g. times\_10, times\_12...).
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**height**: Font height in pixels (all font textures should have the same height)
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**widths** : Array of character widths in pixels, indexed by UTF codepoints
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**margintop**, **marginbottom** and **linespacing** can be negative numbers (default 0) and are to be used to adjust various font styles to each other.
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Font must have a char 0 which will be used to display any unknown char.
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All textures corresponding to the indexes in **widths** array should be present in textures directory with a name matching the pattern :
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All textures corresponding to the indexes in widths array should be present in textures directory with a name matching the pattern :
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**font\_<font\_name>_<utf\_code>.png**
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> font\_**{font_name}**_**{utf_code}**.png
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**<font\_name>**: Name of the font as given in the first argument
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**<utf\_code>**: UTF code of the char in 4 hexadecimal digits
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**{font\_name}**: Name of the font as given in the first argument
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To ease that declaration, a shell is provided to build a <font\_name>.lua file from the texture files (see provided tools).
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**{utf\_code}**: UTF code of the char in 4 hexadecimal digits
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Example : font_courrier_0041.png is for the "A" char in the "courrier" font.
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To ease that declaration (specially to build the **widths** array), a shell is provided to build a {font\_name}.lua file from the texture files (see provided tools).
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## Provided tools
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@ -78,23 +65,23 @@ This script works much better with pixels font, providing the correct height. Th
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__Syntax__
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**make\_font\_texture.sh <fontfile> <fontname> <fontsize>**
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**make\_font\_texture.sh {fontfile} {fontname} {fontsize}**
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**<fontfile>**: A TTF font file to use to create textures.
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**<fontname>**: The font name to be used in font_api (should be simple, with no spaces).
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**<fontsize>**: Font height to be rendered.
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**{fontfile}**: A TTF font file to use to create textures.
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**{fontname}**: The font name to be used in font_api (should be simple, with no spaces).
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**{fontsize}**: Font height to be rendered.
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### make_font_lua.sh
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This script analyses textures in textures directory and creates a font\_<font\_name>.lua files with a call to register_font with images information. Launch it from your future font mod directory.
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This script analyses textures in textures directory and creates a font\_{font\_name}.lua files with a call to register_font with images information. Launch it from your future font mod directory.
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Once the font\_<font\_name>.lua created, it can be included by a init.lua file or directly renamed to init.lua if you are creating a simple font mod.
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Once the font\_{font\_name}.lua created, it can be included by a init.lua file or directly renamed to init.lua if you are creating a simple font mod.
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__Syntax__
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**make\_font_lua.sh <fontname>**
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**make\_font_lua.sh {fontname}**
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**<fontname>**: The font name to be used in font_api (same as given to make\_font\_texture.sh)
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**{fontname}**: The font name to be used in font_api (same as given to make\_font\_texture.sh)
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### An exemple generating a font mod
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@ -104,7 +91,55 @@ __Syntax__
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/<path_to_font_api>/tools/make_font_lua.sh myfont
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mv font_myfont.lua init.lua
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## Font class
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A font usable with font API. This class is supposed to be for internal use but who knows.
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### font\_api.Font:new(def)
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Create a new font object.
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**def** is a table containing font definition. See **Font definition table** above.
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### font:get_char_width(char)
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Returns the width of char **char** in texture pixels.
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**char**: Unicode codepoint of char.
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### font:get_height(nb_of_lines)
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Returns line(s) height. Takes care of top and bottom margins and line spacing.
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**nb_of_lines**: Number of lines in the text.
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### font:get_width(line)
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Returns the width of a text line. Beware, if line contains any new line char, they are ignored.
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**line**: Line of text which the width will be computed.
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### font:make_line_texture(line, texturew, x, y)
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Create a texture for a text line.
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**line**: Line of text to be rendered in texture.
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**texturew**: Width of the texture (extra text is not rendered).
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**x**: Starting x position in texture.
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**y**: Vertical position of the line in texture.
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### font:make_text_texture(text, texturew, textureh, maxlines, halign, valign, color)
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Builds texture for a multiline colored text.
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**text**: Text to be rendered.
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**texturew**: Width of the texture (extra text will be truncated).
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**textureh**: Height of the texture.
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**maxlines**: Maximum number of lines.
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**halign**: Horizontal text align ("left"/"center"/"right") (optional).
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**valign**: Vertical text align ("top"/"center"/"bottom") (optional).
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**color**: Color of the text (optional).
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270
font.lua
Normal file
270
font.lua
Normal file
@ -0,0 +1,270 @@
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--[[
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font_api mod for Minetest - Library to add font display capability
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to display_api mod.
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(c) Pierre-Yves Rollo
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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--]]
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--[[
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Margins, spacings, can be negative numbers
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]]--
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-- Local functions
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------------------
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-- Table deep copy
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local function deep_copy(input)
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local output = {}
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local key, value
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for key, value in pairs(input) do
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if type(value) == 'table' then
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output[key] = deep_copy(value)
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else
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output[key] = value
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end
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end
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return output
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end
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-- Returns next char, managing ascii and unicode plane 0 (0000-FFFF).
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local function get_next_char(text, pos)
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local msb = text:byte(pos)
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-- 1 byte char, ascii equivalent codepoints
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if msb < 0x80 then
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return msb, pos + 1
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end
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-- 4 bytes char not managed (Only 16 bits codepoints are managed)
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if msb >= 0xF0 then
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return 0, pos + 4
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end
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-- 3 bytes char
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if msb >= 0xE0 then
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return (msb - 0xE0) * 0x1000
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+ text:byte(pos + 1) % 0x40 * 0x40
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+ text:byte(pos + 2) % 0x40,
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pos + 3
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end
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-- 2 bytes char (little endian)
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if msb >= 0xC2 then
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return (msb - 0xC2) * 0x40 + text:byte(pos + 1),
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pos + 2
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end
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-- Not an UTF char
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return 0, pos + 1
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end
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-- Split multiline text into array of lines, with <maxlines> maximum lines.
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local function split_lines(text, maxlines)
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local splits = text:split("\n")
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if maxlines then
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local lines = {}
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for num = 1,maxlines do
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lines[num] = splits[num]
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end
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return lines
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else
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return splits
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end
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end
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--------------------------------------------------------------------------------
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--- Font class
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font_api.Font = {}
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function font_api.Font:new(def)
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if type(def) ~= "table" then
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minetest.log("error", "Font definition must be a table.")
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return nil
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end
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if def.height == nil or def.height <= 0 then
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minetest.log("error", "Font definition must have a positive height.")
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return nil
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end
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if type(def.widths) ~= "table" then
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minetest.log("error", "Font definition must have a widths array.")
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return nil
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end
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if def.widths[0] == nil then
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minetest.log("error",
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"Font must have a char with codepoint 0 (=unknown char).")
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return nil
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end
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local font = deep_copy(def)
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setmetatable(font, self)
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self.__index = self
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return font
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end
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--- Returns the width of a given char
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-- @param char : codepoint of the char
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-- @return Char width
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function font_api.Font:get_char_width(char)
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-- Replace chars with no texture by the NULL(0) char
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if self.widths[char] ~= nil then
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return self.widths[char]
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else
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return self.widths[0]
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end
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end
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--- Text height for multiline text including margins and line spacing
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-- @param nb_of_lines : number of text lines (default 1)
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-- @return Text height
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function font_api.Font:get_height(nb_of_lines)
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if nb_of_lines == nil then nb_of_lines = 1 end
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if nb_of_lines > 0 then
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return
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(
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(self.height or 0) +
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(self.margin_top or 0) +
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(self.margin_bottom or 0)
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) * nb_of_lines +
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(self.line_spacing or 0) * (nb_of_lines -1)
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else
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return nb_of_lines == 0 and 0 or nil
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end
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end
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--- Computes text width for a given text (ignores new lines)
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-- @param line Line of text which the width will be computed.
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-- @return Text width
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function font_api.Font:get_width(line)
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local char
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local width = 0
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local pos = 1
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-- TODO: Use iterator
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while pos <= #line do
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char, pos = get_next_char(line, pos)
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width = width + self:get_char_width(char)
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end
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return width
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end
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--- Builds texture part for a text line
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-- @param line Text line to be rendered
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-- @param texturew Width of the texture (extra text is not rendered)
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-- @param x Starting x position in texture
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-- @param y Vertical position of the line in texture
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-- @return Texture string
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function font_api.Font:make_line_texture(line, texturew, x, y)
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local texture = ""
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local char
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local pos = 1
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-- TODO: Use iterator
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while pos <= #text do
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char, pos = get_next_char(line, pos)
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-- Replace chars with no texture by the NULL(0) char
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if self.widths[char] == nil
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or char == 88 --DEBUG
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then
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print(string.format("["..font_api.name
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.."] Missing char %d (%04x)",char,char))
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char = 0
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end
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-- Add image only if it is visible (at least partly)
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if x + self.widths[char] >= 0 and x <= texturew then
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texture = texture..
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string.format(":%d,%d=font_%s_%04x.png",
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x, y, self.name, char)
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end
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x = x + self.widths[char]
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end
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return texture
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end
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--- Builds texture for a multiline colored text
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-- @param text Text to be rendered
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-- @param texturew Width of the texture (extra text will be truncated)
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-- @param textureh Height of the texture
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-- @param maxlines Maximum number of lines
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-- @param halign Horizontal text align ("left"/"center"/"right") (optional)
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-- @param valign Vertical text align ("top"/"center"/"bottom") (optional)
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-- @param color Color of the text (optional)
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-- @return Texture string
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function font_api.Font:make_text_texture(text, texturew, textureh, maxlines,
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halign, valign, color)
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local texture = ""
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local lines = {}
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local textheight = 0
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local y
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-- Split text into lines (limited to maxlines fist lines)
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for num, line in pairs(split_lines(text, maxlines)) do
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lines[num] = { text = line, width = self:get_width(line) }
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end
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textheight = self:get_height(#lines)
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if #lines then
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if valign == "top" then
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y = 0
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elseif valign == "bottom" then
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y = textureh - textheight
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else
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y = (textureh - textheight) / 2
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end
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end
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for _, line in pairs(lines) do
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if halign == "left" then
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texture = texture..
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self:make_line_texture(line.text, texturew,
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0, y)
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elseif halign == "right" then
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texture = texture..
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self:make_line_texture(line.text, texturew,
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texturew - line.width, y)
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else
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texture = texture..
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self:make_line_texture(line.text, texturew,
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(texturew - line.width) / 2, y)
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end
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y = y + self:get_height() + (self.line_spacing or 0)
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end
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texture = string.format("[combine:%dx%d", texturew, textureh)..texture
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if color then texture = texture.."^[colorize:"..color end
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return texture
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end
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295
init.lua
295
init.lua
@ -23,293 +23,12 @@
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font_api = {}
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font_api.name = minetest.get_current_modname()
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font_api.path = minetest.get_modpath(font_api.name)
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font_api.registered_fonts = {}
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-- Local variables
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------------------
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-- Inclusions
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-------------
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local default_font = false
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-- Local functions
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------------------
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-- Split multiline text into array of lines, with <maxlines> maximum lines.
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local function split_lines(text, maxlines)
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local splits = text:split("\n")
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if maxlines then
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local lines = {}
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for num = 1,maxlines do
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lines[num] = splits[num]
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end
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return lines
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else
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return splits
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end
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end
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-- Gets a default (settings or fist font)
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|
||||
local function get_default_font()
|
||||
-- First call
|
||||
if default_font == false then
|
||||
default_font = nil
|
||||
|
||||
-- First, try with settings
|
||||
local settings_font = minetest.settings:get("default_font")
|
||||
|
||||
if settings_font ~= nil and settings_font ~= "" then
|
||||
default_font = font_api.registered_fonts[settings_font]
|
||||
|
||||
if default_font == nil then
|
||||
minetest.log("warning", "Default font in settings (\""..
|
||||
settings_font.."\") is not registered.")
|
||||
end
|
||||
end
|
||||
|
||||
-- If failed, choose first font
|
||||
if default_font == nil then
|
||||
for _, font in pairs(font_api.registered_fonts) do
|
||||
default_font = font
|
||||
break
|
||||
end
|
||||
end
|
||||
|
||||
-- Error, no font registered
|
||||
if default_font == nil then
|
||||
minetest.log("error",
|
||||
"No font registred, unable to choose a default font.")
|
||||
end
|
||||
end
|
||||
|
||||
return default_font
|
||||
end
|
||||
|
||||
-- Returns font properties to be used according to font_name
|
||||
|
||||
local function get_font(font_name)
|
||||
local font = font_api.registered_fonts[font_name]
|
||||
|
||||
if font == nil then
|
||||
local message
|
||||
|
||||
if font_name == nil then
|
||||
message = "No font given"
|
||||
else
|
||||
message = "Font \""..font_name.."\" unregistered"
|
||||
end
|
||||
|
||||
font = get_default_font()
|
||||
|
||||
if font ~= nil then
|
||||
minetest.log("info", message..", using font \""..font.name.."\".")
|
||||
end
|
||||
end
|
||||
|
||||
return font
|
||||
end
|
||||
|
||||
-- Returns next char, managing ascii and unicode plane 0 (0000-FFFF).
|
||||
|
||||
local function get_next_char(text, pos)
|
||||
|
||||
local msb = text:byte(pos)
|
||||
-- 1 byte char, ascii equivalent codepoints
|
||||
if msb < 0x80 then
|
||||
return msb, pos + 1
|
||||
end
|
||||
|
||||
-- 4 bytes char not managed (Only 16 bits codepoints are managed)
|
||||
if msb >= 0xF0 then
|
||||
return 0, pos + 4
|
||||
end
|
||||
|
||||
-- 3 bytes char
|
||||
if msb >= 0xE0 then
|
||||
return (msb - 0xE0) * 0x1000
|
||||
+ text:byte(pos + 1) % 0x40 * 0x40
|
||||
+ text:byte(pos + 2) % 0x40,
|
||||
pos + 3
|
||||
end
|
||||
|
||||
-- 2 bytes char (little endian)
|
||||
if msb >= 0xC2 then
|
||||
return (msb - 0xC2) * 0x40 + text:byte(pos + 1),
|
||||
pos + 2
|
||||
end
|
||||
|
||||
-- Not an UTF char
|
||||
return 0, pos + 1
|
||||
end
|
||||
|
||||
-- API functions
|
||||
----------------
|
||||
|
||||
-- Computes text size for a given font and text (ignores new lines)
|
||||
-- @param font_name Font to be used
|
||||
-- @param text Text to be rendered
|
||||
-- @return Rendered text (width, height)
|
||||
|
||||
function font_api.get_text_size(font_name, text)
|
||||
local char
|
||||
local width = 0
|
||||
local pos = 1
|
||||
local font = get_font(font_name)
|
||||
|
||||
if font == nil then
|
||||
return 0, 0
|
||||
else
|
||||
while pos <= #text do
|
||||
char, pos = get_next_char(text, pos)
|
||||
-- Replace chars with no texture by the NULL(0) char
|
||||
if font.widths[char] ~= nil then
|
||||
width = width + font.widths[char]
|
||||
else
|
||||
width = width + font.widths[0]
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
return width, font.height
|
||||
end
|
||||
|
||||
--- Builds texture part for a text line
|
||||
-- @param font_name Font to be used
|
||||
-- @param text Text to be rendered
|
||||
-- @param width Width of the texture (extra text is not rendered)
|
||||
-- @param x Starting x position in texture
|
||||
-- @param y Vertical position of the line in texture
|
||||
-- @return Texture string
|
||||
|
||||
function font_api.make_line_texture(font_name, text, width, x, y)
|
||||
local texture = ""
|
||||
local char
|
||||
local pos = 1
|
||||
local font = get_font(font_name)
|
||||
|
||||
if font ~= nil then
|
||||
while pos <= #text do
|
||||
char, pos = get_next_char(text, pos)
|
||||
|
||||
-- Replace chars with no texture by the NULL(0) char
|
||||
if font.widths[char] == nil then
|
||||
print(string.format("["..font_api.name
|
||||
.."] Missing char %d (%04x)",char,char))
|
||||
char = 0
|
||||
end
|
||||
|
||||
-- Add image only if it is visible (at least partly)
|
||||
if x + font.widths[char] >= 0 and x <= width then
|
||||
texture = texture..
|
||||
string.format(":%d,%d=font_%s_%04x.png",
|
||||
x, y, font.name, char)
|
||||
end
|
||||
x = x + font.widths[char]
|
||||
end
|
||||
end
|
||||
|
||||
return texture
|
||||
end
|
||||
|
||||
--- Builds texture for a multiline colored text
|
||||
-- @param font_name Font to be used
|
||||
-- @param text Text to be rendered
|
||||
-- @param texturew Width of the texture (extra text will be truncated)
|
||||
-- @param textureh Height of the texture
|
||||
-- @param maxlines Maximum number of lines
|
||||
-- @param halign Horizontal text align ("left"/"center"/"right") (optional)
|
||||
-- @param valign Vertical text align ("top"/"center"/"bottom") (optional)
|
||||
-- @param color Color of the text (optional)
|
||||
-- @return Texture string
|
||||
|
||||
function font_api.make_multiline_texture(font_name, text, width, height,
|
||||
maxlines, halign, valign, color)
|
||||
local texture = ""
|
||||
local lines = {}
|
||||
local textheight = 0
|
||||
local y, w, h
|
||||
|
||||
for num, line in pairs(split_lines(text, maxlines)) do
|
||||
w, h = font_api.get_text_size(font_name, line)
|
||||
lines[num] = { text = line, width = w, height = h, }
|
||||
textheight = textheight + h
|
||||
end
|
||||
|
||||
if #lines then
|
||||
if valign == "top" then
|
||||
y = 0
|
||||
elseif valign == "bottom" then
|
||||
y = height - textheight
|
||||
else
|
||||
y = (height - textheight) / 2
|
||||
end
|
||||
end
|
||||
|
||||
for _, line in pairs(lines) do
|
||||
if halign == "left" then
|
||||
texture = texture..
|
||||
font_api.make_line_texture(font_name, line.text, width,
|
||||
0, y)
|
||||
elseif halign == "right" then
|
||||
texture = texture..
|
||||
font_api.make_line_texture(font_name, line.text, width,
|
||||
width - line.width, y)
|
||||
else
|
||||
texture = texture..
|
||||
font_api.make_line_texture(font_name, line.text, width,
|
||||
(width - line.width) / 2, y)
|
||||
end
|
||||
y = y + line.height
|
||||
end
|
||||
|
||||
texture = string.format("[combine:%dx%d", width, height)..texture
|
||||
if color then texture = texture.."^[colorize:"..color end
|
||||
return texture
|
||||
end
|
||||
|
||||
--- Register a new font
|
||||
-- Textures corresponding to the font should be named after following patern :
|
||||
-- font_<name>_<code>.png
|
||||
-- <name> : name of the font
|
||||
-- <code> : 4 digit hexadecimal unicode of the char
|
||||
-- @param font_name Name of the font to register
|
||||
-- If registering different sizes of the same font, add size in the font name
|
||||
-- (e.g. times_10, times_12...).
|
||||
-- @param height Font height in pixels
|
||||
-- @param widths Array of character widths in pixels, indexed by UTF codepoints
|
||||
|
||||
function font_api.register_font(font_name, height, widths)
|
||||
|
||||
if font_api.registered_fonts[font_name] ~= nil then
|
||||
minetest.log("error", "Font \""..font_name.."\" already registered.")
|
||||
return
|
||||
end
|
||||
|
||||
if height == nil or height <= 0 then
|
||||
minetest.log("error", "Font \""..font_name..
|
||||
"\" must have a positive height.")
|
||||
return
|
||||
end
|
||||
|
||||
if type(widths) ~= "table" then
|
||||
minetest.log("error", "Font \""..font_name..
|
||||
"\" must have a widths array.")
|
||||
return
|
||||
end
|
||||
|
||||
if widths[0] == nil then
|
||||
minetest.log("error", "Font \""..font_name..
|
||||
"\" must have a char with codepoint 0 (=unknown char).")
|
||||
return
|
||||
end
|
||||
|
||||
font_api.registered_fonts[font_name] =
|
||||
{ name = font_name, height = height, widths = widths }
|
||||
|
||||
-- Force to choose again default font
|
||||
-- (allows use of fonts registered after start)
|
||||
default_font = false
|
||||
end
|
||||
dofile(font_api.path.."/font.lua")
|
||||
dofile(font_api.path.."/registry.lua")
|
||||
|
||||
--- Standard on_display_update entity callback.
|
||||
-- Node should have a corresponding display_entity with size, resolution and
|
||||
@ -325,11 +44,9 @@ function font_api.on_display_update(pos, objref)
|
||||
|
||||
if entity and ndef.display_entities[entity.name] then
|
||||
local def = ndef.display_entities[entity.name]
|
||||
local font = get_font(def.font_name)
|
||||
|
||||
local font = font_api.get_font(meta:get_string("font") or def.font_name)
|
||||
objref:set_properties({
|
||||
textures={font_api.make_multiline_texture(
|
||||
def.font_name, text,
|
||||
textures={font:make_text_texture(text,
|
||||
def.size.x * def.resolution.x * font.height,
|
||||
def.size.y * def.resolution.y * font.height,
|
||||
def.maxlines, def.halign, def.valign, def.color)},
|
||||
|
||||
151
registry.lua
Normal file
151
registry.lua
Normal file
@ -0,0 +1,151 @@
|
||||
--[[
|
||||
font_api mod for Minetest - Library to add font display capability
|
||||
to display_api mod.
|
||||
(c) Pierre-Yves Rollo
|
||||
|
||||
This program 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 3 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 General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
--]]
|
||||
|
||||
-- Global variables
|
||||
-------------------
|
||||
|
||||
font_api.registered_fonts = {}
|
||||
font_api.registered_fonts_number = 0
|
||||
|
||||
-- Local variables
|
||||
------------------
|
||||
|
||||
local default_font = false
|
||||
|
||||
-- Local functions
|
||||
------------------
|
||||
|
||||
-- Gets a default (settings or fist font)
|
||||
local function get_default_font()
|
||||
-- First call
|
||||
if default_font == false then
|
||||
default_font = nil
|
||||
|
||||
-- First, try with settings
|
||||
local settings_font = minetest.settings:get("default_font")
|
||||
|
||||
if settings_font ~= nil and settings_font ~= "" then
|
||||
default_font = font_api.registered_fonts[settings_font]
|
||||
|
||||
if default_font == nil then
|
||||
minetest.log("warning", "Default font in settings (\""..
|
||||
settings_font.."\") is not registered.")
|
||||
end
|
||||
end
|
||||
|
||||
-- If failed, choose first font
|
||||
if default_font == nil then
|
||||
for _, font in pairs(font_api.registered_fonts) do
|
||||
default_font = font
|
||||
break
|
||||
end
|
||||
end
|
||||
|
||||
-- Error, no font registered
|
||||
if default_font == nil then
|
||||
minetest.log("error",
|
||||
"No font registred, unable to choose a default font.")
|
||||
end
|
||||
end
|
||||
|
||||
return default_font
|
||||
end
|
||||
|
||||
--- Returns font object to be used according to font_name
|
||||
-- @param font_name: Name of the font
|
||||
-- @return Font object if font found (or default font)
|
||||
|
||||
function font_api.get_font(font_name)
|
||||
local font = font_api.registered_fonts[font_name]
|
||||
|
||||
if font == nil then
|
||||
local message
|
||||
|
||||
if font_name == nil then
|
||||
message = "No font given"
|
||||
else
|
||||
message = "Font \""..font_name.."\" unregistered"
|
||||
end
|
||||
|
||||
font = get_default_font()
|
||||
|
||||
if font ~= nil then
|
||||
minetest.log("info", message..", using font \""..font.name.."\".")
|
||||
end
|
||||
end
|
||||
|
||||
return font
|
||||
end
|
||||
|
||||
-- API functions
|
||||
----------------
|
||||
|
||||
--- Returns de default font name
|
||||
-- @return Default font name
|
||||
|
||||
function font_api.get_default_font_name()
|
||||
return get_default_font().name
|
||||
end
|
||||
|
||||
--- Register a new font
|
||||
-- Textures corresponding to the font should be named after following patern :
|
||||
-- font_<name>_<code>.png
|
||||
-- <name> : name of the font
|
||||
-- <code> : 4 digit hexadecimal unicode of the char
|
||||
-- @param font_name Name of the font to register
|
||||
-- If registering different sizes of the same font, add size in the font name
|
||||
-- (e.g. times_10, times_12...).
|
||||
-- @param def font definition. A associative array with following keys :
|
||||
-- @key height (mandatory) Height in pixels of all font textures
|
||||
-- @key widths (mandatory) Array of character widths in pixels, indexed by
|
||||
-- UTF codepoints
|
||||
-- @key margintop (optional) Margin (in texture pixels) added on top of each
|
||||
-- char texture.
|
||||
-- @key marginbottom (optional) dded at bottom of each char texture.
|
||||
-- @key linespacing (optional) Spacing (in texture pixels) between each lines.
|
||||
-- margintop, marginbottom and linespacing can be negative numbers (default 0)
|
||||
-- and are to be used to adjust various font styles to each other.
|
||||
|
||||
-- TODO: Add something to remove common accent if not defined in font
|
||||
|
||||
function font_api.register_font(font_name, font_def)
|
||||
|
||||
if font_api.registered_fonts[font_name] ~= nil then
|
||||
minetest.log("error", "Font \""..font_name.."\" already registered.")
|
||||
return
|
||||
end
|
||||
|
||||
local font = font_api.Font:new(font_def)
|
||||
|
||||
if font == nil then
|
||||
minetest.log("error", "Unable to register font \""..font_name.."\".")
|
||||
return
|
||||
end
|
||||
|
||||
font.name = font_name
|
||||
font_api.registered_fonts[font_name] = font
|
||||
font_api.registered_fonts_number = font_api.registered_fonts_number + 1
|
||||
|
||||
-- Force to choose again default font
|
||||
-- (allows use of fonts registered after start)
|
||||
default_font = false
|
||||
|
||||
minetest.log("action", "New font registered in font_api: "..font_name..".")
|
||||
end
|
||||
|
||||
@ -3,6 +3,17 @@
|
||||
scriptname=$(basename $0)
|
||||
identify="identify"
|
||||
|
||||
usage() {
|
||||
echo "Usage: $0 fontname"
|
||||
echo "fontname: The name of the font. Must correspond to existing texture/font_<fontname>_????.png files"
|
||||
}
|
||||
|
||||
if [ $# -ne 1 ]
|
||||
then
|
||||
usage
|
||||
exit 1
|
||||
fi
|
||||
|
||||
font_name=$1
|
||||
|
||||
for f in textures/font_${font_name}_????.png
|
||||
@ -41,8 +52,12 @@ $luafile generated by $scriptname $(LANG=en_US date)
|
||||
|
||||
font_api.register_font(
|
||||
'$font_name',
|
||||
$font_height,
|
||||
{ $font_widths }
|
||||
{
|
||||
height = $font_height,
|
||||
widths = {
|
||||
$font_widths
|
||||
},
|
||||
}
|
||||
);
|
||||
" > font_$font_name.lua
|
||||
|
||||
|
||||
@ -67,7 +67,7 @@ generate() {
|
||||
mkdir textures
|
||||
|
||||
# Reads all available code points in the font.
|
||||
codepoints=$(ttx -o - $fontfile | grep "<map code=" | cut -d \" -f 2)
|
||||
codepoints=$(ttx -o - "$fontfile" | grep "<map code=" | cut -d \" -f 2)
|
||||
|
||||
# Mandatory chars
|
||||
generate 0020 007f
|
||||
|
||||
Loading…
Reference in New Issue
Block a user