d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
394 lines
13 KiB
C++
394 lines
13 KiB
C++
/**************************************************************************/
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/* resource_importer_texture_atlas.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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 "resource_importer_texture_atlas.h"
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#include "atlas_import_failed.xpm"
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#include "core/io/file_access.h"
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#include "core/io/image_loader.h"
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#include "core/io/resource_saver.h"
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#include "core/math/geometry_2d.h"
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#include "editor/editor_atlas_packer.h"
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#include "scene/resources/mesh.h"
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#include "scene/resources/texture.h"
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String ResourceImporterTextureAtlas::get_importer_name() const {
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return "texture_atlas";
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}
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String ResourceImporterTextureAtlas::get_visible_name() const {
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return "TextureAtlas";
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}
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void ResourceImporterTextureAtlas::get_recognized_extensions(List<String> *p_extensions) const {
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ImageLoader::get_recognized_extensions(p_extensions);
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}
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String ResourceImporterTextureAtlas::get_save_extension() const {
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return "res";
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}
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String ResourceImporterTextureAtlas::get_resource_type() const {
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return "Texture2D";
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}
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bool ResourceImporterTextureAtlas::get_option_visibility(const String &p_path, const String &p_option, const HashMap<StringName, Variant> &p_options) const {
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return true;
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}
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int ResourceImporterTextureAtlas::get_preset_count() const {
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return 0;
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}
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String ResourceImporterTextureAtlas::get_preset_name(int p_idx) const {
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return String();
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}
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void ResourceImporterTextureAtlas::get_import_options(const String &p_path, List<ImportOption> *r_options, int p_preset) const {
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r_options->push_back(ImportOption(PropertyInfo(Variant::STRING, "atlas_file", PROPERTY_HINT_SAVE_FILE, "*.png"), ""));
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r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "import_mode", PROPERTY_HINT_ENUM, "Region,Mesh2D"), 0));
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r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL, "crop_to_region"), false));
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r_options->push_back(ImportOption(PropertyInfo(Variant::BOOL, "trim_alpha_border_from_region"), true));
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}
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String ResourceImporterTextureAtlas::get_option_group_file() const {
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return "atlas_file";
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}
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Error ResourceImporterTextureAtlas::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) {
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/* If this happens, it's because the atlas_file field was not filled, so just import a broken texture */
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//use an xpm because it's size independent, the editor images are vector and size dependent
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//it's a simple hack
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Ref<Image> broken = memnew(Image((const char **)atlas_import_failed_xpm));
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ResourceSaver::save(ImageTexture::create_from_image(broken), p_save_path + ".tex");
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return OK;
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}
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static void _plot_triangle(Vector2i *vertices, const Vector2i &p_offset, bool p_transposed, Ref<Image> p_image, const Ref<Image> &p_src_image) {
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int width = p_image->get_width();
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int height = p_image->get_height();
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int src_width = p_src_image->get_width();
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int src_height = p_src_image->get_height();
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int x[3];
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int y[3];
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for (int j = 0; j < 3; j++) {
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x[j] = vertices[j].x;
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y[j] = vertices[j].y;
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}
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// sort the points vertically
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if (y[1] > y[2]) {
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SWAP(x[1], x[2]);
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SWAP(y[1], y[2]);
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}
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if (y[0] > y[1]) {
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SWAP(x[0], x[1]);
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SWAP(y[0], y[1]);
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}
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if (y[1] > y[2]) {
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SWAP(x[1], x[2]);
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SWAP(y[1], y[2]);
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}
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double dx_far = double(x[2] - x[0]) / (y[2] - y[0] + 1);
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double dx_upper = double(x[1] - x[0]) / (y[1] - y[0] + 1);
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double dx_low = double(x[2] - x[1]) / (y[2] - y[1] + 1);
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double xf = x[0];
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double xt = x[0] + dx_upper; // if y[0] == y[1], special case
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int max_y = MIN(y[2], height - p_offset.y - 1);
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for (int yi = y[0]; yi < max_y; yi++) {
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if (yi >= 0) {
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for (int xi = (xf > 0 ? int(xf) : 0); xi < (xt <= src_width ? xt : src_width); xi++) {
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int px = xi, py = yi;
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int sx = px, sy = py;
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sx = CLAMP(sx, 0, src_width - 1);
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sy = CLAMP(sy, 0, src_height - 1);
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Color color = p_src_image->get_pixel(sx, sy);
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if (p_transposed) {
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SWAP(px, py);
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}
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px += p_offset.x;
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py += p_offset.y;
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//may have been cropped, so don't blit what is not visible?
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if (px < 0 || px >= width) {
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continue;
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}
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if (py < 0 || py >= height) {
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continue;
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}
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p_image->set_pixel(px, py, color);
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}
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for (int xi = (xf < src_width ? int(xf) : src_width - 1); xi >= (xt > 0 ? xt : 0); xi--) {
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int px = xi, py = yi;
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int sx = px, sy = py;
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sx = CLAMP(sx, 0, src_width - 1);
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sy = CLAMP(sy, 0, src_height - 1);
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Color color = p_src_image->get_pixel(sx, sy);
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if (p_transposed) {
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SWAP(px, py);
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}
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px += p_offset.x;
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py += p_offset.y;
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//may have been cropped, so don't blit what is not visible?
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if (px < 0 || px >= width) {
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continue;
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}
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if (py < 0 || py >= height) {
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continue;
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}
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p_image->set_pixel(px, py, color);
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}
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}
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xf += dx_far;
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if (yi < y[1]) {
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xt += dx_upper;
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} else {
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xt += dx_low;
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}
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}
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}
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Error ResourceImporterTextureAtlas::import_group_file(const String &p_group_file, const HashMap<String, HashMap<StringName, Variant>> &p_source_file_options, const HashMap<String, String> &p_base_paths) {
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ERR_FAIL_COND_V(p_source_file_options.size() == 0, ERR_BUG); //should never happen
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Vector<EditorAtlasPacker::Chart> charts;
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Vector<PackData> pack_data_files;
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pack_data_files.resize(p_source_file_options.size());
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int idx = 0;
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for (const KeyValue<String, HashMap<StringName, Variant>> &E : p_source_file_options) {
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PackData &pack_data = pack_data_files.write[idx];
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const String &source = E.key;
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const HashMap<StringName, Variant> &options = E.value;
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Ref<Image> image;
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image.instantiate();
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Error err = ImageLoader::load_image(source, image);
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ERR_CONTINUE(err != OK);
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pack_data.image = image;
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pack_data.is_cropped = options["crop_to_region"];
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int mode = options["import_mode"];
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bool trim_alpha_border_from_region = options["trim_alpha_border_from_region"];
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if (mode == IMPORT_MODE_REGION) {
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pack_data.is_mesh = false;
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EditorAtlasPacker::Chart chart;
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Rect2i used_rect = Rect2i(Vector2i(), image->get_size());
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if (trim_alpha_border_from_region) {
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// Clip a region from the image.
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used_rect = image->get_used_rect();
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}
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pack_data.region = used_rect;
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chart.vertices.push_back(used_rect.position);
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chart.vertices.push_back(used_rect.position + Vector2i(used_rect.size.x, 0));
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chart.vertices.push_back(used_rect.position + Vector2i(used_rect.size.x, used_rect.size.y));
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chart.vertices.push_back(used_rect.position + Vector2i(0, used_rect.size.y));
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EditorAtlasPacker::Chart::Face f;
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f.vertex[0] = 0;
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f.vertex[1] = 1;
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f.vertex[2] = 2;
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chart.faces.push_back(f);
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f.vertex[0] = 0;
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f.vertex[1] = 2;
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f.vertex[2] = 3;
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chart.faces.push_back(f);
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chart.can_transpose = false;
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pack_data.chart_vertices.push_back(chart.vertices);
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pack_data.chart_pieces.push_back(charts.size());
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charts.push_back(chart);
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} else {
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pack_data.is_mesh = true;
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Ref<BitMap> bit_map;
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bit_map.instantiate();
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bit_map->create_from_image_alpha(image);
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Vector<Vector<Vector2>> polygons = bit_map->clip_opaque_to_polygons(Rect2(0, 0, image->get_width(), image->get_height()));
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for (int j = 0; j < polygons.size(); j++) {
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EditorAtlasPacker::Chart chart;
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chart.vertices = polygons[j];
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chart.can_transpose = true;
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Vector<int> poly = Geometry2D::triangulate_polygon(polygons[j]);
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for (int i = 0; i < poly.size(); i += 3) {
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EditorAtlasPacker::Chart::Face f;
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f.vertex[0] = poly[i + 0];
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f.vertex[1] = poly[i + 1];
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f.vertex[2] = poly[i + 2];
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chart.faces.push_back(f);
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}
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pack_data.chart_pieces.push_back(charts.size());
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charts.push_back(chart);
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pack_data.chart_vertices.push_back(polygons[j]);
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}
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}
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idx++;
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}
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//pack the charts
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int atlas_width, atlas_height;
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EditorAtlasPacker::chart_pack(charts, atlas_width, atlas_height);
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//blit the atlas
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Ref<Image> new_atlas = Image::create_empty(atlas_width, atlas_height, false, Image::FORMAT_RGBA8);
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for (int i = 0; i < pack_data_files.size(); i++) {
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PackData &pack_data = pack_data_files.write[i];
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for (int j = 0; j < pack_data.chart_pieces.size(); j++) {
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const EditorAtlasPacker::Chart &chart = charts[pack_data.chart_pieces[j]];
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for (int k = 0; k < chart.faces.size(); k++) {
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Vector2i positions[3];
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for (int l = 0; l < 3; l++) {
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int vertex_idx = chart.faces[k].vertex[l];
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positions[l] = Vector2i(chart.vertices[vertex_idx]);
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}
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_plot_triangle(positions, Vector2i(chart.final_offset), chart.transposed, new_atlas, pack_data.image);
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}
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}
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}
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//save the atlas
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new_atlas->save_png(p_group_file);
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//update cache if existing, else create
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Ref<Texture2D> cache;
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cache = ResourceCache::get_ref(p_group_file);
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if (!cache.is_valid()) {
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Ref<ImageTexture> res_cache = ImageTexture::create_from_image(new_atlas);
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res_cache->set_path(p_group_file);
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cache = res_cache;
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}
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//save the images
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idx = 0;
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for (const KeyValue<String, HashMap<StringName, Variant>> &E : p_source_file_options) {
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PackData &pack_data = pack_data_files.write[idx];
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Ref<Texture2D> texture;
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if (!pack_data.is_mesh) {
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Vector2 offset = charts[pack_data.chart_pieces[0]].vertices[0] + charts[pack_data.chart_pieces[0]].final_offset;
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//region
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Ref<AtlasTexture> atlas_texture;
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atlas_texture.instantiate();
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atlas_texture->set_atlas(cache);
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atlas_texture->set_region(Rect2(offset, pack_data.region.size));
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if (!pack_data.is_cropped) {
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atlas_texture->set_margin(Rect2(pack_data.region.position, pack_data.image->get_size() - pack_data.region.size));
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}
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texture = atlas_texture;
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} else {
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Ref<ArrayMesh> mesh;
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mesh.instantiate();
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for (int i = 0; i < pack_data.chart_pieces.size(); i++) {
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const EditorAtlasPacker::Chart &chart = charts[pack_data.chart_pieces[i]];
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Vector<Vector2> vertices;
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Vector<int> indices;
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Vector<Vector2> uvs;
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int vc = chart.vertices.size();
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int fc = chart.faces.size();
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vertices.resize(vc);
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uvs.resize(vc);
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indices.resize(fc * 3);
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{
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Vector2 *vw = vertices.ptrw();
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int *iw = indices.ptrw();
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Vector2 *uvw = uvs.ptrw();
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for (int j = 0; j < vc; j++) {
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vw[j] = chart.vertices[j];
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Vector2 uv = chart.vertices[j];
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if (chart.transposed) {
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SWAP(uv.x, uv.y);
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}
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uv += chart.final_offset;
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uv /= new_atlas->get_size(); //normalize uv to 0-1 range
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uvw[j] = uv;
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}
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for (int j = 0; j < fc; j++) {
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iw[j * 3 + 0] = chart.faces[j].vertex[0];
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iw[j * 3 + 1] = chart.faces[j].vertex[1];
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iw[j * 3 + 2] = chart.faces[j].vertex[2];
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}
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}
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Array arrays;
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arrays.resize(Mesh::ARRAY_MAX);
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arrays[Mesh::ARRAY_VERTEX] = vertices;
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arrays[Mesh::ARRAY_TEX_UV] = uvs;
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arrays[Mesh::ARRAY_INDEX] = indices;
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mesh->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES, arrays);
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}
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Ref<MeshTexture> mesh_texture;
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mesh_texture.instantiate();
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mesh_texture->set_base_texture(cache);
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mesh_texture->set_image_size(pack_data.image->get_size());
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mesh_texture->set_mesh(mesh);
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texture = mesh_texture;
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}
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String save_path = p_base_paths[E.key] + ".res";
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ResourceSaver::save(texture, save_path);
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idx++;
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}
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return OK;
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}
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ResourceImporterTextureAtlas::ResourceImporterTextureAtlas() {
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}
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