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/*************************************************************************/
/* resource_importer_texture_atlas.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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_texture_atlas.h"
#include "atlas_import_failed.xpm"
#include "core/io/image_loader.h"
#include "core/io/resource_saver.h"
#include "core/os/file_access.h"
#include "editor/editor_atlas_packer.h"
#include "scene/resources/mesh.h"
#include "scene/resources/texture.h"
String ResourceImporterTextureAtlas::get_importer_name() const {
return "texture_atlas";
}
String ResourceImporterTextureAtlas::get_visible_name() const {
return "TextureAtlas";
}
void ResourceImporterTextureAtlas::get_recognized_extensions(List<String> *p_extensions) const {
ImageLoader::get_recognized_extensions(p_extensions);
}
String ResourceImporterTextureAtlas::get_save_extension() const {
return "res";
}
String ResourceImporterTextureAtlas::get_resource_type() const {
return "Texture2D";
}
bool ResourceImporterTextureAtlas::get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const {
return true;
}
int ResourceImporterTextureAtlas::get_preset_count() const {
return 0;
}
String ResourceImporterTextureAtlas::get_preset_name(int p_idx) const {
return String();
}
void ResourceImporterTextureAtlas::get_import_options(List<ImportOption> *r_options, int p_preset) const {
r_options->push_back(ImportOption(PropertyInfo(Variant::STRING, "atlas_file", PROPERTY_HINT_SAVE_FILE, "*.png"), ""));
r_options->push_back(ImportOption(PropertyInfo(Variant::INT, "import_mode", PROPERTY_HINT_ENUM, "Region,Mesh2D"), 0));
}
String ResourceImporterTextureAtlas::get_option_group_file() const {
return "atlas_file";
}
Error ResourceImporterTextureAtlas::import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files, Variant *r_metadata) {
/* If this happens, it's because the atlas_file field was not filled, so just import a broken texture */
//use an xpm because it's size independent, the editor images are vector and size dependent
//it's a simple hack
Ref<Image> broken = memnew(Image((const char **)atlas_import_failed_xpm));
Ref<ImageTexture> broken_texture;
broken_texture.instance();
broken_texture->create_from_image(broken);
String target_file = p_save_path + ".tex";
ResourceSaver::save(target_file, broken_texture);
return OK;
}
static void _plot_triangle(Vector2 *vertices, const Vector2 &p_offset, bool p_transposed, Ref<Image> p_image, const Ref<Image> &p_src_image) {
int width = p_image->get_width();
int height = p_image->get_height();
int src_width = p_src_image->get_width();
int src_height = p_src_image->get_height();
int x[3];
int y[3];
for (int j = 0; j < 3; j++) {
x[j] = vertices[j].x;
y[j] = vertices[j].y;
}
// sort the points vertically
if (y[1] > y[2]) {
SWAP(x[1], x[2]);
SWAP(y[1], y[2]);
}
if (y[0] > y[1]) {
SWAP(x[0], x[1]);
SWAP(y[0], y[1]);
}
if (y[1] > y[2]) {
SWAP(x[1], x[2]);
SWAP(y[1], y[2]);
}
double dx_far = double(x[2] - x[0]) / (y[2] - y[0] + 1);
double dx_upper = double(x[1] - x[0]) / (y[1] - y[0] + 1);
double dx_low = double(x[2] - x[1]) / (y[2] - y[1] + 1);
double xf = x[0];
double xt = x[0] + dx_upper; // if y[0] == y[1], special case
for (int yi = y[0]; yi <= (y[2] > height - 1 ? height - 1 : y[2]); yi++) {
if (yi >= 0) {
for (int xi = (xf > 0 ? int(xf) : 0); xi <= (xt < width ? xt : width - 1); xi++) {
int px = xi, py = yi;
int sx = px, sy = py;
sx = CLAMP(sx, 0, src_width - 1);
sy = CLAMP(sy, 0, src_height - 1);
Color color = p_src_image->get_pixel(sx, sy);
if (p_transposed) {
SWAP(px, py);
}
px += p_offset.x;
py += p_offset.y;
//may have been cropped, so don't blit what is not visible?
if (px < 0 || px >= width) {
continue;
}
if (py < 0 || py >= height) {
continue;
}
p_image->set_pixel(px, py, color);
}
for (int xi = (xf < width ? int(xf) : width - 1); xi >= (xt > 0 ? xt : 0); xi--) {
int px = xi, py = yi;
int sx = px, sy = py;
sx = CLAMP(sx, 0, src_width - 1);
sy = CLAMP(sy, 0, src_height - 1);
Color color = p_src_image->get_pixel(sx, sy);
if (p_transposed) {
SWAP(px, py);
}
px += p_offset.x;
py += p_offset.y;
//may have been cropped, so don't blit what is not visible?
if (px < 0 || px >= width) {
continue;
}
if (py < 0 || py >= height) {
continue;
}
p_image->set_pixel(px, py, color);
}
}
xf += dx_far;
if (yi < y[1])
xt += dx_upper;
else
xt += dx_low;
}
}
Error ResourceImporterTextureAtlas::import_group_file(const String &p_group_file, const Map<String, Map<StringName, Variant>> &p_source_file_options, const Map<String, String> &p_base_paths) {
ERR_FAIL_COND_V(p_source_file_options.size() == 0, ERR_BUG); //should never happen
Vector<EditorAtlasPacker::Chart> charts;
Vector<PackData> pack_data_files;
pack_data_files.resize(p_source_file_options.size());
int idx = 0;
for (const Map<String, Map<StringName, Variant>>::Element *E = p_source_file_options.front(); E; E = E->next(), idx++) {
PackData &pack_data = pack_data_files.write[idx];
const String &source = E->key();
const Map<StringName, Variant> &options = E->get();
Ref<Image> image;
image.instance();
Error err = ImageLoader::load_image(source, image);
ERR_CONTINUE(err != OK);
pack_data.image = image;
int mode = options["import_mode"];
if (mode == IMPORT_MODE_REGION) {
pack_data.is_mesh = false;
EditorAtlasPacker::Chart chart;
//clip a region from the image
Rect2 used_rect = image->get_used_rect();
pack_data.region = used_rect;
chart.vertices.push_back(used_rect.position);
chart.vertices.push_back(used_rect.position + Vector2(used_rect.size.x, 0));
chart.vertices.push_back(used_rect.position + Vector2(used_rect.size.x, used_rect.size.y));
chart.vertices.push_back(used_rect.position + Vector2(0, used_rect.size.y));
EditorAtlasPacker::Chart::Face f;
f.vertex[0] = 0;
f.vertex[1] = 1;
f.vertex[2] = 2;
chart.faces.push_back(f);
f.vertex[0] = 0;
f.vertex[1] = 2;
f.vertex[2] = 3;
chart.faces.push_back(f);
chart.can_transpose = false;
pack_data.chart_vertices.push_back(chart.vertices);
pack_data.chart_pieces.push_back(charts.size());
charts.push_back(chart);
} else {
pack_data.is_mesh = true;
Ref<BitMap> bit_map;
bit_map.instance();
bit_map->create_from_image_alpha(image);
Vector<Vector<Vector2>> polygons = bit_map->clip_opaque_to_polygons(Rect2(0, 0, image->get_width(), image->get_height()));
for (int j = 0; j < polygons.size(); j++) {
EditorAtlasPacker::Chart chart;
chart.vertices = polygons[j];
chart.can_transpose = true;
Vector<int> poly = Geometry::triangulate_polygon(polygons[j]);
for (int i = 0; i < poly.size(); i += 3) {
EditorAtlasPacker::Chart::Face f;
f.vertex[0] = poly[i + 0];
f.vertex[1] = poly[i + 1];
f.vertex[2] = poly[i + 2];
chart.faces.push_back(f);
}
pack_data.chart_pieces.push_back(charts.size());
charts.push_back(chart);
pack_data.chart_vertices.push_back(polygons[j]);
}
}
}
//pack the charts
int atlas_width, atlas_height;
EditorAtlasPacker::chart_pack(charts, atlas_width, atlas_height);
//blit the atlas
Ref<Image> new_atlas;
new_atlas.instance();
new_atlas->create(atlas_width, atlas_height, false, Image::FORMAT_RGBA8);
for (int i = 0; i < pack_data_files.size(); i++) {
PackData &pack_data = pack_data_files.write[i];
for (int j = 0; j < pack_data.chart_pieces.size(); j++) {
const EditorAtlasPacker::Chart &chart = charts[pack_data.chart_pieces[j]];
for (int k = 0; k < chart.faces.size(); k++) {
Vector2 positions[3];
for (int l = 0; l < 3; l++) {
int vertex_idx = chart.faces[k].vertex[l];
positions[l] = chart.vertices[vertex_idx];
}
_plot_triangle(positions, chart.final_offset, chart.transposed, new_atlas, pack_data.image);
}
}
}
//save the atlas
new_atlas->save_png(p_group_file);
//update cache if existing, else create
Ref<Texture2D> cache;
if (ResourceCache::has(p_group_file)) {
Resource *resptr = ResourceCache::get(p_group_file);
cache.reference_ptr(resptr);
} else {
Ref<ImageTexture> res_cache;
res_cache.instance();
res_cache->create_from_image(new_atlas);
res_cache->set_path(p_group_file);
cache = res_cache;
}
//save the images
idx = 0;
for (const Map<String, Map<StringName, Variant>>::Element *E = p_source_file_options.front(); E; E = E->next(), idx++) {
PackData &pack_data = pack_data_files.write[idx];
Ref<Texture2D> texture;
if (!pack_data.is_mesh) {
Vector2 offset = charts[pack_data.chart_pieces[0]].vertices[0] + charts[pack_data.chart_pieces[0]].final_offset;
//region
Ref<AtlasTexture> atlas_texture;
atlas_texture.instance();
atlas_texture->set_atlas(cache);
atlas_texture->set_region(Rect2(offset, pack_data.region.size));
atlas_texture->set_margin(Rect2(pack_data.region.position, Size2(pack_data.image->get_width(), pack_data.image->get_height()) - pack_data.region.size));
texture = atlas_texture;
} else {
Ref<ArrayMesh> mesh;
mesh.instance();
for (int i = 0; i < pack_data.chart_pieces.size(); i++) {
const EditorAtlasPacker::Chart &chart = charts[pack_data.chart_pieces[i]];
Vector<Vector2> vertices;
Vector<int> indices;
Vector<Vector2> uvs;
int vc = chart.vertices.size();
int fc = chart.faces.size();
vertices.resize(vc);
uvs.resize(vc);
indices.resize(fc * 3);
{
Vector2 *vw = vertices.ptrw();
int *iw = indices.ptrw();
Vector2 *uvw = uvs.ptrw();
for (int j = 0; j < vc; j++) {
vw[j] = chart.vertices[j];
Vector2 uv = chart.vertices[j];
if (chart.transposed) {
SWAP(uv.x, uv.y);
}
uv += chart.final_offset;
uv /= new_atlas->get_size(); //normalize uv to 0-1 range
uvw[j] = uv;
}
for (int j = 0; j < fc; j++) {
iw[j * 3 + 0] = chart.faces[j].vertex[0];
iw[j * 3 + 1] = chart.faces[j].vertex[1];
iw[j * 3 + 2] = chart.faces[j].vertex[2];
}
}
Array arrays;
arrays.resize(Mesh::ARRAY_MAX);
arrays[Mesh::ARRAY_VERTEX] = vertices;
arrays[Mesh::ARRAY_TEX_UV] = uvs;
arrays[Mesh::ARRAY_INDEX] = indices;
mesh->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES, arrays);
}
Ref<MeshTexture> mesh_texture;
mesh_texture.instance();
mesh_texture->set_base_texture(cache);
mesh_texture->set_image_size(pack_data.image->get_size());
mesh_texture->set_mesh(mesh);
texture = mesh_texture;
//mesh
}
String save_path = p_base_paths[E->key()] + ".res";
ResourceSaver::save(save_path, texture);
}
return OK;
}
ResourceImporterTextureAtlas::ResourceImporterTextureAtlas() {
}
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