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godot/editor/import/resource_importer_imagefont.cpp

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/**************************************************************************/
/* resource_importer_imagefont.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "resource_importer_imagefont.h"
#include "core/io/image_loader.h"
#include "core/io/resource_saver.h"
String ResourceImporterImageFont::get_importer_name() const {
return "font_data_image";
}
String ResourceImporterImageFont::get_visible_name() const {
return "Font Data (Image Font)";
}
void ResourceImporterImageFont::get_recognized_extensions(List<String> *p_extensions) const {
if (p_extensions) {
ImageLoader::get_recognized_extensions(p_extensions);
}
}
String ResourceImporterImageFont::get_save_extension() const {
return "fontdata";
}
String ResourceImporterImageFont::get_resource_type() const {
return "FontFile";
}
bool ResourceImporterImageFont::get_option_visibility(const String &p_path, const String &p_option, const HashMap<StringName, Variant> &p_options) const {
return true;
}
void ResourceImporterImageFont::get_import_options(const String &p_path, List<ImportOption> *r_options, int p_preset) const {
r_options->push_back(ImportOption(PropertyInfo(Variant::PACKED_STRING_ARRAY, "character_ranges"), Vector<String>()));
r_options->push_back(ImportOption(PropertyInfo(Variant::PACKED_STRING_ARRAY, "kerning_pairs"), Vector<String>()));
r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "columns", PROPERTY_HINT_RANGE, "1,1024,1,or_greater"), 1));
r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "rows", PROPERTY_HINT_RANGE, "1,1024,1,or_greater"), 1));
r_options->push_back(ImportOption(PropertyInfo(Variant::RECT2I, "image_margin"), Rect2i()));
r_options->push_back(ImportOption(PropertyInfo(Variant::RECT2I, "character_margin"), Rect2i()));
r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "ascent"), 0));
r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "descent"), 0));
r_options->push_back(ImportOption(PropertyInfo(Variant::ARRAY, "fallbacks", PROPERTY_HINT_ARRAY_TYPE, MAKE_RESOURCE_TYPE_HINT("Font")), Array()));
r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL, "compress"), true));
r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "scaling_mode", PROPERTY_HINT_ENUM, "Disabled,Enabled (Integer),Enabled (Fractional)"), TextServer::FIXED_SIZE_SCALE_ENABLED));
}
Error ResourceImporterImageFont::import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files, Variant *r_metadata) {
print_verbose("Importing image font from: " + p_source_file);
int columns = p_options["columns"];
int rows = p_options["rows"];
int ascent = p_options["ascent"];
int descent = p_options["descent"];
Vector<String> ranges = p_options["character_ranges"];
Vector<String> kern = p_options["kerning_pairs"];
Array fallbacks = p_options["fallbacks"];
Rect2i img_margin = p_options["image_margin"];
Rect2i char_margin = p_options["character_margin"];
TextServer::FixedSizeScaleMode smode = (TextServer::FixedSizeScaleMode)p_options["scaling_mode"].operator int();
Ref<Image> img;
img.instantiate();
Error err = ImageLoader::load_image(p_source_file, img);
ERR_FAIL_COND_V_MSG(err != OK, ERR_FILE_CANT_READ, vformat("Can't load font texture: \"%s\".", p_source_file));
ERR_FAIL_COND_V_MSG(columns <= 0, ERR_FILE_CANT_READ, vformat("Columns (%d) must be positive.", columns));
ERR_FAIL_COND_V_MSG(rows <= 0, ERR_FILE_CANT_READ, vformat("Rows (%d) must be positive.", rows));
int count = columns * rows;
int chr_cell_width = (img->get_width() - img_margin.position.x - img_margin.size.x) / columns;
int chr_cell_height = (img->get_height() - img_margin.position.y - img_margin.size.y) / rows;
ERR_FAIL_COND_V_MSG(chr_cell_width <= 0 || chr_cell_height <= 0, ERR_FILE_CANT_READ, "Image margin too big.");
int chr_width = chr_cell_width - char_margin.position.x - char_margin.size.x;
int chr_height = chr_cell_height - char_margin.position.y - char_margin.size.y;
ERR_FAIL_COND_V_MSG(chr_width <= 0 || chr_height <= 0, ERR_FILE_CANT_READ, "Character margin too big.");
Ref<FontFile> font;
font.instantiate();
font->set_antialiasing(TextServer::FONT_ANTIALIASING_NONE);
font->set_generate_mipmaps(false);
font->set_multichannel_signed_distance_field(false);
font->set_fixed_size(chr_height);
font->set_subpixel_positioning(TextServer::SUBPIXEL_POSITIONING_DISABLED);
font->set_force_autohinter(false);
font->set_allow_system_fallback(false);
font->set_hinting(TextServer::HINTING_NONE);
font->set_oversampling(1.0f);
font->set_fallbacks(fallbacks);
font->set_texture_image(0, Vector2i(chr_height, 0), 0, img);
font->set_fixed_size_scale_mode(smode);
int32_t pos = 0;
for (const String &range : ranges) {
int32_t start = -1;
int32_t end = -1;
int chr_adv = 0;
Vector2i chr_off;
{
enum RangeParseStep {
STEP_START_BEGIN,
STEP_START_READ_HEX,
STEP_START_READ_DEC,
STEP_END_BEGIN,
STEP_END_READ_HEX,
STEP_END_READ_DEC,
STEP_ADVANCE_BEGIN,
STEP_OFF_X_BEGIN,
STEP_OFF_Y_BEGIN,
STEP_FINISHED,
};
RangeParseStep step = STEP_START_BEGIN;
String token;
for (int c = 0; c < range.length(); c++) {
switch (step) {
case STEP_START_BEGIN:
case STEP_END_BEGIN: {
// Read range start/end first symbol.
if (range[c] == 'U' || range[c] == 'u') {
if ((c <= range.length() - 2) && range[c + 1] == '+') {
token = String();
if (step == STEP_START_BEGIN) {
step = STEP_START_READ_HEX;
} else {
step = STEP_END_READ_HEX;
}
c++; // Skip "+".
continue;
}
} else if (range[c] == '0' && (c <= range.length() - 2) && range[c + 1] == 'x') {
// Read hexadecimal value, start.
token = String();
if (step == STEP_START_BEGIN) {
step = STEP_START_READ_HEX;
} else {
step = STEP_END_READ_HEX;
}
c++; // Skip "x".
continue;
} else if (range[c] == '\'' || range[c] == '\"') {
if ((c <= range.length() - 3) && (range[c + 2] == '\'' || range[c + 2] == '\"')) {
token = String();
if (step == STEP_START_BEGIN) {
start = range.unicode_at(c + 1);
step = STEP_END_BEGIN;
} else {
end = range.unicode_at(c + 1);
step = STEP_ADVANCE_BEGIN;
}
c = c + 2; // Skip the rest or token.
continue;
}
} else if (is_digit(range[c])) {
// Read decimal value, start.
token = String();
token += range[c];
if (step == STEP_START_BEGIN) {
step = STEP_START_READ_DEC;
} else {
step = STEP_END_READ_DEC;
}
continue;
}
[[fallthrough]];
}
case STEP_ADVANCE_BEGIN:
case STEP_OFF_X_BEGIN:
case STEP_OFF_Y_BEGIN: {
// Read advance and offset.
if (range[c] == ' ') {
int next = range.find(" ", c + 1);
if (next < c) {
next = range.length();
}
if (step == STEP_OFF_X_BEGIN) {
chr_off.x = range.substr(c + 1, next - (c + 1)).to_int();
step = STEP_OFF_Y_BEGIN;
} else if (step == STEP_OFF_Y_BEGIN) {
chr_off.y = range.substr(c + 1, next - (c + 1)).to_int();
step = STEP_FINISHED;
} else {
chr_adv = range.substr(c + 1, next - (c + 1)).to_int();
step = STEP_OFF_X_BEGIN;
}
c = next - 1;
continue;
}
} break;
case STEP_START_READ_HEX:
case STEP_END_READ_HEX: {
// Read hexadecimal value.
if (is_hex_digit(range[c])) {
token += range[c];
} else {
if (step == STEP_START_READ_HEX) {
start = token.hex_to_int();
step = STEP_END_BEGIN;
} else {
end = token.hex_to_int();
step = STEP_ADVANCE_BEGIN;
c--;
}
}
} break;
case STEP_START_READ_DEC:
case STEP_END_READ_DEC: {
// Read decimal value.
if (is_digit(range[c])) {
token += range[c];
} else {
if (step == STEP_START_READ_DEC) {
start = token.to_int();
step = STEP_END_BEGIN;
} else {
end = token.to_int();
step = STEP_ADVANCE_BEGIN;
c--;
}
}
} break;
default: {
WARN_PRINT(vformat("Invalid character \"%d\" in the range: \"%s\"", c, range));
} break;
}
}
if (step == STEP_START_READ_HEX) {
start = token.hex_to_int();
} else if (step == STEP_START_READ_DEC) {
start = token.to_int();
} else if (step == STEP_END_READ_HEX) {
end = token.hex_to_int();
} else if (step == STEP_END_READ_DEC) {
end = token.to_int();
}
if (end == -1) {
end = start;
}
if (start == -1) {
WARN_PRINT(vformat("Invalid range: \"%s\"", range));
continue;
}
}
for (int32_t idx = MIN(start, end); idx <= MAX(start, end); idx++) {
ERR_FAIL_COND_V_MSG(pos >= count, ERR_CANT_CREATE, "Too many characters in range, should be " + itos(columns * rows));
int x = pos % columns;
int y = pos / columns;
font->set_glyph_advance(0, chr_height, idx, Vector2(chr_width + chr_adv, 0));
font->set_glyph_offset(0, Vector2i(chr_height, 0), idx, Vector2i(0, -0.5 * chr_height) + chr_off);
font->set_glyph_size(0, Vector2i(chr_height, 0), idx, Vector2(chr_width, chr_height));
font->set_glyph_uv_rect(0, Vector2i(chr_height, 0), idx, Rect2(img_margin.position.x + chr_cell_width * x + char_margin.position.x, img_margin.position.y + chr_cell_height * y + char_margin.position.y, chr_width, chr_height));
font->set_glyph_texture_idx(0, Vector2i(chr_height, 0), idx, 0);
pos++;
}
}
for (const String &kp : kern) {
const Vector<String> &kp_tokens = kp.split(" ");
if (kp_tokens.size() != 3) {
WARN_PRINT(vformat("Invalid kerning pairs string: \"%s\"", kp));
continue;
}
String from_tokens;
for (int i = 0; i < kp_tokens[0].length(); i++) {
if (i <= kp_tokens[0].length() - 6 && kp_tokens[0][i] == '\\' && kp_tokens[0][i + 1] == 'u' && is_hex_digit(kp_tokens[0][i + 2]) && is_hex_digit(kp_tokens[0][i + 3]) && is_hex_digit(kp_tokens[0][i + 4]) && is_hex_digit(kp_tokens[0][i + 5])) {
char32_t charcode = kp_tokens[0].substr(i + 2, 4).hex_to_int();
from_tokens += charcode;
i += 5;
} else {
from_tokens += kp_tokens[0][i];
}
}
String to_tokens;
for (int i = 0; i < kp_tokens[1].length(); i++) {
if (i <= kp_tokens[1].length() - 6 && kp_tokens[1][i] == '\\' && kp_tokens[1][i + 1] == 'u' && is_hex_digit(kp_tokens[1][i + 2]) && is_hex_digit(kp_tokens[1][i + 3]) && is_hex_digit(kp_tokens[1][i + 4]) && is_hex_digit(kp_tokens[1][i + 5])) {
char32_t charcode = kp_tokens[1].substr(i + 2, 4).hex_to_int();
to_tokens += charcode;
i += 5;
} else {
to_tokens += kp_tokens[1][i];
}
}
int offset = kp_tokens[2].to_int();
for (int a = 0; a < from_tokens.length(); a++) {
for (int b = 0; b < to_tokens.length(); b++) {
font->set_kerning(0, chr_height, Vector2i(from_tokens.unicode_at(a), to_tokens.unicode_at(b)), Vector2(offset, 0));
}
}
}
if (ascent > 0) {
font->set_cache_ascent(0, chr_height, ascent);
} else {
font->set_cache_ascent(0, chr_height, 0.5 * chr_height);
}
if (descent > 0) {
font->set_cache_descent(0, chr_height, descent);
} else {
font->set_cache_descent(0, chr_height, 0.5 * chr_height);
}
int flg = 0;
if ((bool)p_options["compress"]) {
flg |= ResourceSaver::SaverFlags::FLAG_COMPRESS;
}
print_verbose("Saving to: " + p_save_path + ".fontdata");
err = ResourceSaver::save(font, p_save_path + ".fontdata", flg);
ERR_FAIL_COND_V_MSG(err != OK, err, "Cannot save font to file \"" + p_save_path + ".res\".");
print_verbose("Done saving to: " + p_save_path + ".fontdata");
return OK;
}
ResourceImporterImageFont::ResourceImporterImageFont() {
}
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