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585 lines
18 KiB
C++
585 lines
18 KiB
C++
/*************************************************************************/
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/* bitmap_font_adv.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "bitmap_font_adv.h"
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/*************************************************************************/
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/* hb_bmp_font_t HarfBuzz Bitmap font interface */
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/*************************************************************************/
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struct hb_bmp_font_t {
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BitmapFontDataAdvanced *face = nullptr;
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float font_size = 0.0;
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bool unref = false; /* Whether to destroy bm_face when done. */
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};
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static hb_bmp_font_t *_hb_bmp_font_create(BitmapFontDataAdvanced *p_face, float p_font_size, bool p_unref) {
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hb_bmp_font_t *bm_font = reinterpret_cast<hb_bmp_font_t *>(calloc(1, sizeof(hb_bmp_font_t)));
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if (!bm_font) {
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return nullptr;
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}
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bm_font->face = p_face;
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bm_font->font_size = p_font_size;
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bm_font->unref = p_unref;
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return bm_font;
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}
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static void _hb_bmp_font_destroy(void *data) {
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hb_bmp_font_t *bm_font = reinterpret_cast<hb_bmp_font_t *>(data);
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free(bm_font);
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}
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static hb_bool_t hb_bmp_get_nominal_glyph(hb_font_t *font, void *font_data, hb_codepoint_t unicode, hb_codepoint_t *glyph, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return false;
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}
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if (!bm_font->face->has_char(unicode)) {
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if (bm_font->face->has_char(0xF000u + unicode)) {
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*glyph = 0xF000u + unicode;
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return true;
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} else {
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return false;
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}
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}
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*glyph = unicode;
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return true;
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}
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static hb_position_t hb_bmp_get_glyph_h_advance(hb_font_t *font, void *font_data, hb_codepoint_t glyph, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return 0;
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}
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if (!bm_font->face->has_char(glyph)) {
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return 0;
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}
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return bm_font->face->get_advance(glyph, bm_font->font_size).x * 64;
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}
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static hb_position_t hb_bmp_get_glyph_v_advance(hb_font_t *font, void *font_data, hb_codepoint_t glyph, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return 0;
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}
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if (!bm_font->face->has_char(glyph)) {
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return 0;
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}
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return -bm_font->face->get_advance(glyph, bm_font->font_size).y * 64;
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}
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static hb_position_t hb_bmp_get_glyph_h_kerning(hb_font_t *font, void *font_data, hb_codepoint_t left_glyph, hb_codepoint_t right_glyph, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return 0;
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}
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if (!bm_font->face->has_char(left_glyph)) {
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return 0;
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}
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if (!bm_font->face->has_char(right_glyph)) {
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return 0;
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}
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return bm_font->face->get_kerning(left_glyph, right_glyph, bm_font->font_size).x * 64;
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}
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static hb_bool_t hb_bmp_get_glyph_v_origin(hb_font_t *font, void *font_data, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return false;
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}
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if (!bm_font->face->has_char(glyph)) {
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return false;
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}
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*x = bm_font->face->get_advance(glyph, bm_font->font_size).x * 32;
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*y = bm_font->face->get_ascent(bm_font->font_size) * 64;
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return true;
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}
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static hb_bool_t hb_bmp_get_glyph_extents(hb_font_t *font, void *font_data, hb_codepoint_t glyph, hb_glyph_extents_t *extents, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return false;
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}
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if (!bm_font->face->has_char(glyph)) {
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return false;
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}
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extents->x_bearing = 0;
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extents->y_bearing = 0;
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extents->width = bm_font->face->get_size(glyph, bm_font->font_size).x * 64;
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extents->height = bm_font->face->get_size(glyph, bm_font->font_size).y * 64;
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return true;
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}
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static hb_bool_t hb_bmp_get_font_h_extents(hb_font_t *font, void *font_data, hb_font_extents_t *metrics, void *user_data) {
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const hb_bmp_font_t *bm_font = reinterpret_cast<const hb_bmp_font_t *>(font_data);
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if (!bm_font->face) {
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return false;
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}
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metrics->ascender = bm_font->face->get_ascent(bm_font->font_size);
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metrics->descender = bm_font->face->get_descent(bm_font->font_size);
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metrics->line_gap = 0;
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return true;
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}
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static hb_font_funcs_t *funcs = nullptr;
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void hb_bmp_create_font_funcs() {
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funcs = hb_font_funcs_create();
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hb_font_funcs_set_font_h_extents_func(funcs, hb_bmp_get_font_h_extents, nullptr, nullptr);
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//hb_font_funcs_set_font_v_extents_func (funcs, hb_bmp_get_font_v_extents, nullptr, nullptr);
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hb_font_funcs_set_nominal_glyph_func(funcs, hb_bmp_get_nominal_glyph, nullptr, nullptr);
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//hb_font_funcs_set_variation_glyph_func (funcs, hb_bmp_get_variation_glyph, nullptr, nullptr);
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hb_font_funcs_set_glyph_h_advance_func(funcs, hb_bmp_get_glyph_h_advance, nullptr, nullptr);
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hb_font_funcs_set_glyph_v_advance_func(funcs, hb_bmp_get_glyph_v_advance, nullptr, nullptr);
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//hb_font_funcs_set_glyph_h_origin_func(funcs, hb_bmp_get_glyph_h_origin, nullptr, nullptr);
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hb_font_funcs_set_glyph_v_origin_func(funcs, hb_bmp_get_glyph_v_origin, nullptr, nullptr);
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hb_font_funcs_set_glyph_h_kerning_func(funcs, hb_bmp_get_glyph_h_kerning, nullptr, nullptr);
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//hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_bmp_get_glyph_v_kerning, nullptr, nullptr);
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hb_font_funcs_set_glyph_extents_func(funcs, hb_bmp_get_glyph_extents, nullptr, nullptr);
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//hb_font_funcs_set_glyph_contour_point_func (funcs, hb_bmp_get_glyph_contour_point, nullptr, nullptr);
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//hb_font_funcs_set_glyph_name_func (funcs, hb_bmp_get_glyph_name, nullptr, nullptr);
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//hb_font_funcs_set_glyph_from_name_func (funcs, hb_bmp_get_glyph_from_name, nullptr, nullptr);
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hb_font_funcs_make_immutable(funcs);
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}
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void hb_bmp_free_font_funcs() {
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if (funcs != nullptr) {
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hb_font_funcs_destroy(funcs);
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funcs = nullptr;
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}
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}
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static void _hb_bmp_font_set_funcs(hb_font_t *p_font, BitmapFontDataAdvanced *p_face, int p_size, bool p_unref) {
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hb_font_set_funcs(p_font, funcs, _hb_bmp_font_create(p_face, p_size, p_unref), _hb_bmp_font_destroy);
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}
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hb_font_t *hb_bmp_font_create(BitmapFontDataAdvanced *p_face, int p_size, hb_destroy_func_t p_destroy) {
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hb_font_t *font;
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hb_face_t *face = hb_face_create(nullptr, 0);
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font = hb_font_create(face);
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hb_face_destroy(face);
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_hb_bmp_font_set_funcs(font, p_face, p_size, false);
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return font;
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}
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/*************************************************************************/
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/* BitmapFontDataAdvanced */
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/*************************************************************************/
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Error BitmapFontDataAdvanced::load_from_file(const String &p_filename, int p_base_size) {
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_THREAD_SAFE_METHOD_
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//fnt format used by angelcode bmfont
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//http://www.angelcode.com/products/bmfont/
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FileAccess *f = FileAccess::open(p_filename, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(!f, ERR_FILE_NOT_FOUND, "Can't open font: " + p_filename + ".");
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while (true) {
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String line = f->get_line();
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int delimiter = line.find(" ");
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String type = line.substr(0, delimiter);
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int pos = delimiter + 1;
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Map<String, String> keys;
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while (pos < line.size() && line[pos] == ' ') {
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pos++;
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}
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while (pos < line.size()) {
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int eq = line.find("=", pos);
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if (eq == -1) {
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break;
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}
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String key = line.substr(pos, eq - pos);
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int end = -1;
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String value;
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if (line[eq + 1] == '"') {
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end = line.find("\"", eq + 2);
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if (end == -1) {
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break;
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}
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value = line.substr(eq + 2, end - 1 - eq - 1);
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pos = end + 1;
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} else {
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end = line.find(" ", eq + 1);
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if (end == -1) {
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end = line.size();
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}
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value = line.substr(eq + 1, end - eq);
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pos = end;
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}
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while (pos < line.size() && line[pos] == ' ') {
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pos++;
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}
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keys[key] = value;
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}
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if (type == "info") {
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if (keys.has("size")) {
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base_size = keys["size"].to_int();
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}
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} else if (type == "common") {
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if (keys.has("lineHeight")) {
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height = keys["lineHeight"].to_int();
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}
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if (keys.has("base")) {
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ascent = keys["base"].to_int();
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}
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} else if (type == "page") {
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if (keys.has("file")) {
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String base_dir = p_filename.get_base_dir();
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String file = base_dir.plus_file(keys["file"]);
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if (RenderingServer::get_singleton() != nullptr) {
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Ref<Texture2D> tex = ResourceLoader::load(file);
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if (tex.is_null()) {
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ERR_PRINT("Can't load font texture!");
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} else {
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ERR_FAIL_COND_V_MSG(tex.is_null(), ERR_FILE_CANT_READ, "It's not a reference to a valid Texture object.");
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textures.push_back(tex);
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}
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}
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}
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} else if (type == "char") {
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Character c;
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char32_t idx = 0;
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if (keys.has("id")) {
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idx = keys["id"].to_int();
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}
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if (keys.has("x")) {
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c.rect.position.x = keys["x"].to_int();
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}
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if (keys.has("y")) {
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c.rect.position.y = keys["y"].to_int();
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}
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if (keys.has("width")) {
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c.rect.size.width = keys["width"].to_int();
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}
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if (keys.has("height")) {
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c.rect.size.height = keys["height"].to_int();
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}
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if (keys.has("xoffset")) {
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c.align.x = keys["xoffset"].to_int();
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}
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if (keys.has("yoffset")) {
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c.align.y = keys["yoffset"].to_int();
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}
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if (keys.has("page")) {
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c.texture_idx = keys["page"].to_int();
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}
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if (keys.has("xadvance")) {
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c.advance.x = keys["xadvance"].to_int();
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}
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if (keys.has("yadvance")) {
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c.advance.x = keys["yadvance"].to_int();
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}
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if (c.advance.x < 0) {
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c.advance.x = c.rect.size.width + 1;
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}
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if (c.advance.y < 0) {
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c.advance.y = c.rect.size.height + 1;
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}
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char_map[idx] = c;
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} else if (type == "kerning") {
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KerningPairKey kpk;
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float k = 0.0;
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if (keys.has("first")) {
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kpk.A = keys["first"].to_int();
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}
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if (keys.has("second")) {
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kpk.B = keys["second"].to_int();
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}
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if (keys.has("amount")) {
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k = keys["amount"].to_int();
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}
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kerning_map[kpk] = k;
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}
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if (f->eof_reached()) {
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break;
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}
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}
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if (base_size == 0) {
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base_size = height;
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}
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if (hb_handle) {
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hb_font_destroy(hb_handle);
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}
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hb_handle = hb_bmp_font_create(this, base_size, nullptr);
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valid = true;
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memdelete(f);
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return OK;
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}
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Error BitmapFontDataAdvanced::bitmap_new(float p_height, float p_ascent, int p_base_size) {
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height = p_height;
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ascent = p_ascent;
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base_size = p_base_size;
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if (base_size == 0) {
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base_size = height;
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}
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char_map.clear();
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textures.clear();
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kerning_map.clear();
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if (hb_handle) {
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hb_font_destroy(hb_handle);
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}
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hb_handle = hb_bmp_font_create(this, base_size, nullptr);
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valid = true;
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return OK;
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}
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void BitmapFontDataAdvanced::bitmap_add_texture(const Ref<Texture> &p_texture) {
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ERR_FAIL_COND(!valid);
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ERR_FAIL_COND_MSG(p_texture.is_null(), "It's not a reference to a valid Texture object.");
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textures.push_back(p_texture);
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}
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void BitmapFontDataAdvanced::bitmap_add_char(char32_t p_char, int p_texture_idx, const Rect2 &p_rect, const Size2 &p_align, float p_advance) {
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ERR_FAIL_COND(!valid);
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Character chr;
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chr.rect = p_rect;
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chr.texture_idx = p_texture_idx;
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if (p_advance < 0) {
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chr.advance.x = chr.rect.size.x;
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} else {
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chr.advance.x = p_advance;
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}
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chr.align = p_align;
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char_map[p_char] = chr;
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}
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void BitmapFontDataAdvanced::bitmap_add_kerning_pair(char32_t p_A, char32_t p_B, int p_kerning) {
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ERR_FAIL_COND(!valid);
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KerningPairKey kpk;
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kpk.A = p_A;
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kpk.B = p_B;
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if (p_kerning == 0 && kerning_map.has(kpk)) {
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kerning_map.erase(kpk);
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} else {
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kerning_map[kpk] = p_kerning;
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}
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}
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float BitmapFontDataAdvanced::get_height(int p_size) const {
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ERR_FAIL_COND_V(!valid, 0.f);
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return height * (float(p_size) / float(base_size));
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}
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float BitmapFontDataAdvanced::get_ascent(int p_size) const {
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ERR_FAIL_COND_V(!valid, 0.f);
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return ascent * (float(p_size) / float(base_size));
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}
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float BitmapFontDataAdvanced::get_descent(int p_size) const {
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ERR_FAIL_COND_V(!valid, 0.f);
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return (height - ascent) * (float(p_size) / float(base_size));
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}
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float BitmapFontDataAdvanced::get_underline_position(int p_size) const {
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ERR_FAIL_COND_V(!valid, 0.f);
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return 2 * (float(p_size) / float(base_size));
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}
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float BitmapFontDataAdvanced::get_underline_thickness(int p_size) const {
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ERR_FAIL_COND_V(!valid, 0.f);
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return 1 * (float(p_size) / float(base_size));
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}
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void BitmapFontDataAdvanced::set_distance_field_hint(bool p_distance_field) {
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distance_field_hint = p_distance_field;
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}
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bool BitmapFontDataAdvanced::get_distance_field_hint() const {
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return distance_field_hint;
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}
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float BitmapFontDataAdvanced::get_base_size() const {
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return base_size;
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}
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hb_font_t *BitmapFontDataAdvanced::get_hb_handle(int p_size) {
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_THREAD_SAFE_METHOD_
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ERR_FAIL_COND_V(!valid, nullptr);
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return hb_handle;
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}
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bool BitmapFontDataAdvanced::has_char(char32_t p_char) const {
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_THREAD_SAFE_METHOD_
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ERR_FAIL_COND_V(!valid, false);
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return char_map.has(p_char);
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}
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String BitmapFontDataAdvanced::get_supported_chars() const {
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_THREAD_SAFE_METHOD_
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ERR_FAIL_COND_V(!valid, String());
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String chars;
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const uint32_t *k = nullptr;
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while ((k = char_map.next(k))) {
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chars += char32_t(*k);
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}
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return chars;
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}
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Vector2 BitmapFontDataAdvanced::get_advance(uint32_t p_char, int p_size) const {
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_THREAD_SAFE_METHOD_
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ERR_FAIL_COND_V(!valid, Vector2());
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const Character *c = char_map.getptr(p_char);
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ERR_FAIL_COND_V(c == nullptr, Vector2());
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|
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return c->advance * (float(p_size) / float(base_size));
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}
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|
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Vector2 BitmapFontDataAdvanced::get_align(uint32_t p_char, int p_size) const {
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|
_THREAD_SAFE_METHOD_
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|
ERR_FAIL_COND_V(!valid, Vector2());
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|
const Character *c = char_map.getptr(p_char);
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|
ERR_FAIL_COND_V(c == nullptr, Vector2());
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|
|
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return c->align * (float(p_size) / float(base_size));
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}
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|
|
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Vector2 BitmapFontDataAdvanced::get_size(uint32_t p_char, int p_size) const {
|
|
_THREAD_SAFE_METHOD_
|
|
ERR_FAIL_COND_V(!valid, Vector2());
|
|
const Character *c = char_map.getptr(p_char);
|
|
ERR_FAIL_COND_V(c == nullptr, Vector2());
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|
|
|
return c->rect.size * (float(p_size) / float(base_size));
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}
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|
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float BitmapFontDataAdvanced::get_font_scale(int p_size) const {
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|
return float(p_size) / float(base_size);
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|
}
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|
|
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Vector2 BitmapFontDataAdvanced::get_kerning(uint32_t p_char, uint32_t p_next, int p_size) const {
|
|
_THREAD_SAFE_METHOD_
|
|
ERR_FAIL_COND_V(!valid, Vector2());
|
|
KerningPairKey kpk;
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|
kpk.A = p_char;
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|
kpk.B = p_next;
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|
|
|
const Map<KerningPairKey, int>::Element *E = kerning_map.find(kpk);
|
|
if (E) {
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|
return Vector2(-E->get() * (float(p_size) / float(base_size)), 0.f);
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|
} else {
|
|
return Vector2();
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|
}
|
|
}
|
|
|
|
Vector2 BitmapFontDataAdvanced::draw_glyph(RID p_canvas, int p_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const {
|
|
_THREAD_SAFE_METHOD_
|
|
if (p_index == 0) {
|
|
return Vector2();
|
|
}
|
|
ERR_FAIL_COND_V(!valid, Vector2());
|
|
const Character *c = char_map.getptr(p_index);
|
|
|
|
ERR_FAIL_COND_V(c == nullptr, Vector2());
|
|
ERR_FAIL_COND_V(c->texture_idx < -1 || c->texture_idx >= textures.size(), Vector2());
|
|
if (c->texture_idx != -1) {
|
|
Point2i cpos = p_pos;
|
|
cpos += (c->align + Vector2(0, -ascent)) * (float(p_size) / float(base_size));
|
|
Size2i csize = c->rect.size * (float(p_size) / float(base_size));
|
|
if (RenderingServer::get_singleton() != nullptr) {
|
|
//if (distance_field_hint) { // Not implemented.
|
|
// RenderingServer::get_singleton()->canvas_item_set_distance_field_mode(p_canvas, true);
|
|
//}
|
|
RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas, Rect2(cpos, csize), textures[c->texture_idx]->get_rid(), c->rect, p_color, false, false);
|
|
//if (distance_field_hint) {
|
|
// RenderingServer::get_singleton()->canvas_item_set_distance_field_mode(p_canvas, false);
|
|
//}
|
|
}
|
|
}
|
|
|
|
return c->advance * (float(p_size) / float(base_size));
|
|
}
|
|
|
|
Vector2 BitmapFontDataAdvanced::draw_glyph_outline(RID p_canvas, int p_size, int p_outline_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const {
|
|
_THREAD_SAFE_METHOD_
|
|
if (p_index == 0) {
|
|
return Vector2();
|
|
}
|
|
ERR_FAIL_COND_V(!valid, Vector2());
|
|
const Character *c = char_map.getptr(p_index);
|
|
|
|
ERR_FAIL_COND_V(c == nullptr, Vector2());
|
|
ERR_FAIL_COND_V(c->texture_idx < -1 || c->texture_idx >= textures.size(), Vector2());
|
|
|
|
// Not supported, return advance for compatibility.
|
|
|
|
return c->advance * (float(p_size) / float(base_size));
|
|
}
|
|
|
|
BitmapFontDataAdvanced::~BitmapFontDataAdvanced() {
|
|
if (hb_handle) {
|
|
hb_font_destroy(hb_handle);
|
|
}
|
|
}
|