/**************************************************************************/ /* thorvg_svg_in_ot.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. */ /**************************************************************************/ #ifdef GDEXTENSION // Headers for building as GDExtension plug-in. #include <godot_cpp/classes/xml_parser.hpp> #include <godot_cpp/core/mutex_lock.hpp> #include <godot_cpp/godot.hpp> #include <godot_cpp/templates/vector.hpp> using namespace godot; #else // Headers for building as built-in module. #include "core/error/error_macros.h" #include "core/io/xml_parser.h" #include "core/os/memory.h" #include "core/os/os.h" #include "core/string/ustring.h" #include "core/typedefs.h" #include "core/variant/variant.h" #include "modules/modules_enabled.gen.h" // For svg. #endif #ifdef MODULE_SVG_ENABLED #include "thorvg_bounds_iterator.h" #include "thorvg_svg_in_ot.h" #include <freetype/otsvg.h> #include <ft2build.h> #include <math.h> #include <stdlib.h> FT_Error tvg_svg_in_ot_init(FT_Pointer *p_state) { *p_state = memnew(TVG_State); return FT_Err_Ok; } void tvg_svg_in_ot_free(FT_Pointer *p_state) { TVG_State *state = *reinterpret_cast<TVG_State **>(p_state); memdelete(state); } FT_Error tvg_svg_in_ot_preset_slot(FT_GlyphSlot p_slot, FT_Bool p_cache, FT_Pointer *p_state) { TVG_State *state = *reinterpret_cast<TVG_State **>(p_state); if (!state) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "SVG in OT state not initialized."); } MutexLock lock(state->mutex); FT_SVG_Document document = (FT_SVG_Document)p_slot->other; FT_Size_Metrics metrics = document->metrics; GL_State &gl_state = state->glyph_map[p_slot->glyph_index]; if (!gl_state.ready) { Ref<XMLParser> parser; parser.instantiate(); parser->_open_buffer((const uint8_t *)document->svg_document, document->svg_document_length); float aspect = 1.0f; String xml_body; while (parser->read() == OK) { if (parser->has_attribute("id")) { const String &gl_name = parser->get_named_attribute_value("id"); if (gl_name.begins_with("glyph")) { int dot_pos = gl_name.find("."); int64_t gl_idx = gl_name.substr(5, (dot_pos > 0) ? dot_pos - 5 : -1).to_int(); if (p_slot->glyph_index != gl_idx) { parser->skip_section(); continue; } } } if (parser->get_node_type() == XMLParser::NODE_ELEMENT && parser->get_node_name() == "svg") { if (parser->has_attribute("viewBox")) { PackedStringArray vb = parser->get_named_attribute_value("viewBox").split(" "); if (vb.size() == 4) { aspect = vb[2].to_float() / vb[3].to_float(); } } continue; } if (parser->get_node_type() == XMLParser::NODE_ELEMENT) { xml_body += vformat("<%s", parser->get_node_name()); for (int i = 0; i < parser->get_attribute_count(); i++) { xml_body += vformat(" %s=\"%s\"", parser->get_attribute_name(i), parser->get_attribute_value(i)); } xml_body += ">"; } else if (parser->get_node_type() == XMLParser::NODE_TEXT) { xml_body += parser->get_node_data(); } else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END) { xml_body += vformat("</%s>", parser->get_node_name()); } } String temp_xml = "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 0 0\">" + xml_body; std::unique_ptr<tvg::Picture> picture = tvg::Picture::gen(); tvg::Result result = picture->load(temp_xml.utf8().get_data(), temp_xml.utf8().length(), "svg+xml", false); if (result != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "Failed to load SVG document (bounds detection)."); } float min_x = INFINITY, min_y = INFINITY, max_x = -INFINITY, max_y = -INFINITY; tvg_get_bounds(picture.get(), min_x, min_y, max_x, max_y); float new_h = (max_y - min_y); float new_w = (max_x - min_x); if (new_h * aspect >= new_w) { new_w = (new_h * aspect); } else { new_h = (new_w / aspect); } gl_state.xml_code = "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"" + rtos(min_x) + " " + rtos(min_y) + " " + rtos(new_w) + " " + rtos(new_h) + "\">" + xml_body; picture = tvg::Picture::gen(); result = picture->load(gl_state.xml_code.utf8().get_data(), gl_state.xml_code.utf8().length(), "svg+xml", false); if (result != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "Failed to load SVG document (glyph metrics)."); } float x_svg_to_out, y_svg_to_out; x_svg_to_out = (float)metrics.x_ppem / new_w; y_svg_to_out = (float)metrics.y_ppem / new_h; gl_state.m.e11 = (double)document->transform.xx / (1 << 16) * x_svg_to_out; gl_state.m.e12 = -(double)document->transform.xy / (1 << 16) * x_svg_to_out; gl_state.m.e21 = -(double)document->transform.yx / (1 << 16) * y_svg_to_out; gl_state.m.e22 = (double)document->transform.yy / (1 << 16) * y_svg_to_out; gl_state.m.e13 = (double)document->delta.x / 64 * new_w / metrics.x_ppem; gl_state.m.e23 = -(double)document->delta.y / 64 * new_h / metrics.y_ppem; gl_state.m.e31 = 0; gl_state.m.e32 = 0; gl_state.m.e33 = 1; result = picture->transform(gl_state.m); if (result != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "Failed to apply transform to SVG document."); } result = picture->bounds(&gl_state.x, &gl_state.y, &gl_state.w, &gl_state.h, true); if (result != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "Failed to get SVG bounds."); } gl_state.bmp_y = -min_y * gl_state.h / new_h; gl_state.bmp_x = min_x * gl_state.w / new_w; gl_state.ready = true; } p_slot->bitmap_left = (FT_Int)gl_state.bmp_x; p_slot->bitmap_top = (FT_Int)gl_state.bmp_y; float tmp = ceil(gl_state.h); p_slot->bitmap.rows = (unsigned int)tmp; tmp = ceil(gl_state.w); p_slot->bitmap.width = (unsigned int)tmp; p_slot->bitmap.pitch = (int)p_slot->bitmap.width * 4; p_slot->bitmap.pixel_mode = FT_PIXEL_MODE_BGRA; float metrics_width, metrics_height; float horiBearingX, horiBearingY; float vertBearingX, vertBearingY; metrics_width = (float)gl_state.w; metrics_height = (float)gl_state.h; horiBearingX = (float)gl_state.x; horiBearingY = (float)-gl_state.y; vertBearingX = p_slot->metrics.horiBearingX / 64.0f - p_slot->metrics.horiAdvance / 64.0f / 2; vertBearingY = (p_slot->metrics.vertAdvance / 64.0f - p_slot->metrics.height / 64.0f) / 2; tmp = roundf(metrics_width * 64); p_slot->metrics.width = (FT_Pos)tmp; tmp = roundf(metrics_height * 64); p_slot->metrics.height = (FT_Pos)tmp; p_slot->metrics.horiBearingX = (FT_Pos)(horiBearingX * 64); p_slot->metrics.horiBearingY = (FT_Pos)(horiBearingY * 64); p_slot->metrics.vertBearingX = (FT_Pos)(vertBearingX * 64); p_slot->metrics.vertBearingY = (FT_Pos)(vertBearingY * 64); if (p_slot->metrics.vertAdvance == 0) { p_slot->metrics.vertAdvance = (FT_Pos)(metrics_height * 1.2f * 64); } return FT_Err_Ok; } FT_Error tvg_svg_in_ot_render(FT_GlyphSlot p_slot, FT_Pointer *p_state) { TVG_State *state = *reinterpret_cast<TVG_State **>(p_state); if (!state) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "SVG in OT state not initialized."); } MutexLock lock(state->mutex); if (!state->glyph_map.has(p_slot->glyph_index)) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "SVG glyph not loaded."); } GL_State &gl_state = state->glyph_map[p_slot->glyph_index]; ERR_FAIL_COND_V_MSG(!gl_state.ready, FT_Err_Invalid_SVG_Document, "SVG glyph not ready."); std::unique_ptr<tvg::Picture> picture = tvg::Picture::gen(); tvg::Result res = picture->load(gl_state.xml_code.utf8().get_data(), gl_state.xml_code.utf8().length(), "svg+xml", false); if (res != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "Failed to load SVG document (glyph rendering)."); } res = picture->transform(gl_state.m); if (res != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_SVG_Document, "Failed to apply transform to SVG document."); } std::unique_ptr<tvg::SwCanvas> sw_canvas = tvg::SwCanvas::gen(); res = sw_canvas->target((uint32_t *)p_slot->bitmap.buffer, (int)p_slot->bitmap.width, (int)p_slot->bitmap.width, (int)p_slot->bitmap.rows, tvg::SwCanvas::ARGB8888_STRAIGHT); if (res != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_Outline, "Failed to create SVG canvas."); } res = sw_canvas->push(std::move(picture)); if (res != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_Outline, "Failed to set SVG canvas source."); } res = sw_canvas->draw(); if (res != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_Outline, "Failed to draw to SVG canvas."); } res = sw_canvas->sync(); if (res != tvg::Result::Success) { ERR_FAIL_V_MSG(FT_Err_Invalid_Outline, "Failed to sync SVG canvas."); } state->glyph_map.erase(p_slot->glyph_index); p_slot->bitmap.pixel_mode = FT_PIXEL_MODE_BGRA; p_slot->bitmap.num_grays = 256; p_slot->format = FT_GLYPH_FORMAT_BITMAP; return FT_Err_Ok; } SVG_RendererHooks tvg_svg_in_ot_hooks = { (SVG_Lib_Init_Func)tvg_svg_in_ot_init, (SVG_Lib_Free_Func)tvg_svg_in_ot_free, (SVG_Lib_Render_Func)tvg_svg_in_ot_render, (SVG_Lib_Preset_Slot_Func)tvg_svg_in_ot_preset_slot, }; SVG_RendererHooks *get_tvg_svg_in_ot_hooks() { return &tvg_svg_in_ot_hooks; } #endif // MODULE_SVG_ENABLED