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28e7069ee0
EditorResourcePreviewGenerator::_generate says that "Returning an empty texture is an OK way to fail and let another generator take care." This patch enables that behavior.
552 lines
20 KiB
C++
552 lines
20 KiB
C++
/**************************************************************************/
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/* editor_resource_preview.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 "editor_resource_preview.h"
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#include "core/config/project_settings.h"
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#include "core/io/file_access.h"
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#include "core/io/resource_loader.h"
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#include "core/io/resource_saver.h"
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#include "core/variant/variant_utility.h"
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#include "editor/editor_node.h"
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#include "editor/editor_paths.h"
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#include "editor/editor_settings.h"
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#include "editor/editor_string_names.h"
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#include "editor/themes/editor_scale.h"
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#include "scene/main/window.h"
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#include "scene/resources/image_texture.h"
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#include "servers/rendering/rendering_server_default.h"
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bool EditorResourcePreviewGenerator::handles(const String &p_type) const {
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bool success = false;
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if (GDVIRTUAL_CALL(_handles, p_type, success)) {
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return success;
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}
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ERR_FAIL_V_MSG(false, "EditorResourcePreviewGenerator::_handles needs to be overridden.");
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}
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Ref<Texture2D> EditorResourcePreviewGenerator::generate(const Ref<Resource> &p_from, const Size2 &p_size, Dictionary &p_metadata) const {
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Ref<Texture2D> preview;
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if (GDVIRTUAL_CALL(_generate, p_from, p_size, p_metadata, preview)) {
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return preview;
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}
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ERR_FAIL_V_MSG(Ref<Texture2D>(), "EditorResourcePreviewGenerator::_generate needs to be overridden.");
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}
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Ref<Texture2D> EditorResourcePreviewGenerator::generate_from_path(const String &p_path, const Size2 &p_size, Dictionary &p_metadata) const {
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Ref<Texture2D> preview;
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if (GDVIRTUAL_CALL(_generate_from_path, p_path, p_size, p_metadata, preview)) {
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return preview;
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}
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Ref<Resource> res = ResourceLoader::load(p_path);
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if (!res.is_valid()) {
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return res;
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}
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return generate(res, p_size, p_metadata);
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}
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bool EditorResourcePreviewGenerator::generate_small_preview_automatically() const {
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bool success = false;
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GDVIRTUAL_CALL(_generate_small_preview_automatically, success);
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return success;
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}
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bool EditorResourcePreviewGenerator::can_generate_small_preview() const {
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bool success = false;
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GDVIRTUAL_CALL(_can_generate_small_preview, success);
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return success;
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}
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void EditorResourcePreviewGenerator::_bind_methods() {
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GDVIRTUAL_BIND(_handles, "type");
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GDVIRTUAL_BIND(_generate, "resource", "size", "metadata");
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GDVIRTUAL_BIND(_generate_from_path, "path", "size", "metadata");
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GDVIRTUAL_BIND(_generate_small_preview_automatically);
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GDVIRTUAL_BIND(_can_generate_small_preview);
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}
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EditorResourcePreviewGenerator::EditorResourcePreviewGenerator() {
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}
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void EditorResourcePreviewGenerator::DrawRequester::request_and_wait(RID p_viewport) const {
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Callable request_vp_update_once = callable_mp(RS::get_singleton(), &RS::viewport_set_update_mode).bind(p_viewport, RS::VIEWPORT_UPDATE_ONCE);
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if (EditorResourcePreview::get_singleton()->is_threaded()) {
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RS::get_singleton()->connect(SNAME("frame_pre_draw"), request_vp_update_once, Object::CONNECT_ONE_SHOT);
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RS::get_singleton()->request_frame_drawn_callback(callable_mp(const_cast<EditorResourcePreviewGenerator::DrawRequester *>(this), &EditorResourcePreviewGenerator::DrawRequester::_post_semaphore));
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semaphore.wait();
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} else {
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// Avoid the main viewport and children being redrawn.
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SceneTree *st = Object::cast_to<SceneTree>(OS::get_singleton()->get_main_loop());
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ERR_FAIL_NULL_MSG(st, "Editor's MainLoop is not a SceneTree. This is a bug.");
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RID root_vp = st->get_root()->get_viewport_rid();
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RenderingServer::get_singleton()->viewport_set_active(root_vp, false);
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request_vp_update_once.call();
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RS::get_singleton()->draw(false);
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// Let main viewport and children be drawn again.
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RenderingServer::get_singleton()->viewport_set_active(root_vp, true);
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}
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}
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void EditorResourcePreviewGenerator::DrawRequester::abort() const {
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if (EditorResourcePreview::get_singleton()->is_threaded()) {
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semaphore.post();
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}
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}
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Variant EditorResourcePreviewGenerator::DrawRequester::_post_semaphore() const {
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semaphore.post();
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return Variant(); // Needed because of how the callback is used.
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}
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bool EditorResourcePreview::is_threaded() const {
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return RSG::texture_storage->can_create_resources_async();
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}
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void EditorResourcePreview::_thread_func(void *ud) {
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EditorResourcePreview *erp = (EditorResourcePreview *)ud;
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erp->_thread();
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}
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void EditorResourcePreview::_preview_ready(const String &p_path, int p_hash, const Ref<Texture2D> &p_texture, const Ref<Texture2D> &p_small_texture, ObjectID id, const StringName &p_func, const Variant &p_ud, const Dictionary &p_metadata) {
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{
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MutexLock lock(preview_mutex);
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uint64_t modified_time = 0;
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if (!p_path.begins_with("ID:")) {
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modified_time = FileAccess::get_modified_time(p_path);
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}
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Item item;
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item.preview = p_texture;
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item.small_preview = p_small_texture;
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item.last_hash = p_hash;
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item.modified_time = modified_time;
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item.preview_metadata = p_metadata;
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cache[p_path] = item;
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}
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Callable(id, p_func).call_deferred(p_path, p_texture, p_small_texture, p_ud);
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}
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void EditorResourcePreview::_generate_preview(Ref<ImageTexture> &r_texture, Ref<ImageTexture> &r_small_texture, const QueueItem &p_item, const String &cache_base, Dictionary &p_metadata) {
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String type;
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uint64_t started_at = OS::get_singleton()->get_ticks_usec();
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if (p_item.resource.is_valid()) {
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type = p_item.resource->get_class();
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} else {
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type = ResourceLoader::get_resource_type(p_item.path);
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}
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if (type.is_empty()) {
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r_texture = Ref<ImageTexture>();
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r_small_texture = Ref<ImageTexture>();
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if (is_print_verbose_enabled()) {
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print_line(vformat("Generated '%s' preview in %d usec", p_item.path, OS::get_singleton()->get_ticks_usec() - started_at));
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}
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return; //could not guess type
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}
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int thumbnail_size = EDITOR_GET("filesystem/file_dialog/thumbnail_size");
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thumbnail_size *= EDSCALE;
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r_texture = Ref<ImageTexture>();
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r_small_texture = Ref<ImageTexture>();
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for (int i = 0; i < preview_generators.size(); i++) {
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if (!preview_generators[i]->handles(type)) {
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continue;
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}
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Ref<Texture2D> generated;
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if (p_item.resource.is_valid()) {
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generated = preview_generators.write[i]->generate(p_item.resource, Vector2(thumbnail_size, thumbnail_size), p_metadata);
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} else {
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generated = preview_generators.write[i]->generate_from_path(p_item.path, Vector2(thumbnail_size, thumbnail_size), p_metadata);
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}
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r_texture = generated;
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if (preview_generators[i]->can_generate_small_preview()) {
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Ref<Texture2D> generated_small;
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Dictionary d;
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if (p_item.resource.is_valid()) {
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generated_small = preview_generators.write[i]->generate(p_item.resource, Vector2(small_thumbnail_size, small_thumbnail_size), d);
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} else {
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generated_small = preview_generators.write[i]->generate_from_path(p_item.path, Vector2(small_thumbnail_size, small_thumbnail_size), d);
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}
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r_small_texture = generated_small;
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}
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if (!r_small_texture.is_valid() && r_texture.is_valid() && preview_generators[i]->generate_small_preview_automatically()) {
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Ref<Image> small_image = r_texture->get_image();
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small_image = small_image->duplicate();
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small_image->resize(small_thumbnail_size, small_thumbnail_size, Image::INTERPOLATE_CUBIC);
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r_small_texture.instantiate();
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r_small_texture->set_image(small_image);
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}
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if (generated.is_valid()) {
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break;
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}
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}
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if (!p_item.resource.is_valid()) {
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// Cache the preview in case it's a resource on disk.
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if (r_texture.is_valid()) {
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// Wow it generated a preview... save cache.
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bool has_small_texture = r_small_texture.is_valid();
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ResourceSaver::save(r_texture, cache_base + ".png");
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if (has_small_texture) {
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ResourceSaver::save(r_small_texture, cache_base + "_small.png");
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}
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Ref<FileAccess> f = FileAccess::open(cache_base + ".txt", FileAccess::WRITE);
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ERR_FAIL_COND_MSG(f.is_null(), "Cannot create file '" + cache_base + ".txt'. Check user write permissions.");
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_write_preview_cache(f, thumbnail_size, has_small_texture, FileAccess::get_modified_time(p_item.path), FileAccess::get_md5(p_item.path), p_metadata);
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}
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}
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if (is_print_verbose_enabled()) {
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print_line(vformat("Generated '%s' preview in %d usec", p_item.path, OS::get_singleton()->get_ticks_usec() - started_at));
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}
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}
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const Dictionary EditorResourcePreview::get_preview_metadata(const String &p_path) const {
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ERR_FAIL_COND_V(!cache.has(p_path), Dictionary());
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return cache[p_path].preview_metadata;
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}
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void EditorResourcePreview::_iterate() {
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preview_mutex.lock();
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if (queue.size() == 0) {
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preview_mutex.unlock();
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return;
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}
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QueueItem item = queue.front()->get();
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queue.pop_front();
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if (cache.has(item.path)) {
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Item cached_item = cache[item.path];
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// Already has it because someone loaded it, just let it know it's ready.
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_preview_ready(item.path, cached_item.last_hash, cached_item.preview, cached_item.small_preview, item.id, item.function, item.userdata, cached_item.preview_metadata);
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preview_mutex.unlock();
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return;
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}
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preview_mutex.unlock();
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Ref<ImageTexture> texture;
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Ref<ImageTexture> small_texture;
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int thumbnail_size = EDITOR_GET("filesystem/file_dialog/thumbnail_size");
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thumbnail_size *= EDSCALE;
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if (item.resource.is_valid()) {
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Dictionary preview_metadata;
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_generate_preview(texture, small_texture, item, String(), preview_metadata);
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_preview_ready(item.path, item.resource->hash_edited_version_for_preview(), texture, small_texture, item.id, item.function, item.userdata, preview_metadata);
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return;
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}
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Dictionary preview_metadata;
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String temp_path = EditorPaths::get_singleton()->get_cache_dir();
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String cache_base = ProjectSettings::get_singleton()->globalize_path(item.path).md5_text();
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cache_base = temp_path.path_join("resthumb-" + cache_base);
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// Does not have it, try to load a cached thumbnail.
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String file = cache_base + ".txt";
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Ref<FileAccess> f = FileAccess::open(file, FileAccess::READ);
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if (f.is_null()) {
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// No cache found, generate.
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_generate_preview(texture, small_texture, item, cache_base, preview_metadata);
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} else {
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uint64_t modtime = FileAccess::get_modified_time(item.path);
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int tsize;
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bool has_small_texture;
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uint64_t last_modtime;
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String hash;
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bool outdated;
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_read_preview_cache(f, &tsize, &has_small_texture, &last_modtime, &hash, &preview_metadata, &outdated);
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bool cache_valid = true;
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if (tsize != thumbnail_size) {
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cache_valid = false;
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f.unref();
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} else if (outdated) {
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cache_valid = false;
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f.unref();
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} else if (last_modtime != modtime) {
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String last_md5 = f->get_line();
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String md5 = FileAccess::get_md5(item.path);
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f.unref();
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if (last_md5 != md5) {
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cache_valid = false;
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} else {
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// Update modified time.
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Ref<FileAccess> f2 = FileAccess::open(file, FileAccess::WRITE);
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if (f2.is_null()) {
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// Not returning as this would leave the thread hanging and would require
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// some proper cleanup/disabling of resource preview generation.
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ERR_PRINT("Cannot create file '" + file + "'. Check user write permissions.");
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} else {
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_write_preview_cache(f2, thumbnail_size, has_small_texture, modtime, md5, preview_metadata);
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}
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}
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} else {
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f.unref();
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}
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if (cache_valid) {
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Ref<Image> img;
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img.instantiate();
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Ref<Image> small_img;
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small_img.instantiate();
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if (img->load(cache_base + ".png") != OK) {
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cache_valid = false;
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} else {
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texture.instantiate();
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texture->set_image(img);
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if (has_small_texture) {
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if (small_img->load(cache_base + "_small.png") != OK) {
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cache_valid = false;
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} else {
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small_texture.instantiate();
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small_texture->set_image(small_img);
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}
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}
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}
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}
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if (!cache_valid) {
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_generate_preview(texture, small_texture, item, cache_base, preview_metadata);
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}
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}
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_preview_ready(item.path, 0, texture, small_texture, item.id, item.function, item.userdata, preview_metadata);
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}
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void EditorResourcePreview::_write_preview_cache(Ref<FileAccess> p_file, int p_thumbnail_size, bool p_has_small_texture, uint64_t p_modified_time, const String &p_hash, const Dictionary &p_metadata) {
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p_file->store_line(itos(p_thumbnail_size));
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p_file->store_line(itos(p_has_small_texture));
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p_file->store_line(itos(p_modified_time));
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p_file->store_line(p_hash);
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p_file->store_line(VariantUtilityFunctions::var_to_str(p_metadata).replace("\n", " "));
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p_file->store_line(itos(CURRENT_METADATA_VERSION));
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}
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void EditorResourcePreview::_read_preview_cache(Ref<FileAccess> p_file, int *r_thumbnail_size, bool *r_has_small_texture, uint64_t *r_modified_time, String *r_hash, Dictionary *r_metadata, bool *r_outdated) {
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*r_thumbnail_size = p_file->get_line().to_int();
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*r_has_small_texture = p_file->get_line().to_int();
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*r_modified_time = p_file->get_line().to_int();
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*r_hash = p_file->get_line();
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*r_metadata = VariantUtilityFunctions::str_to_var(p_file->get_line());
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*r_outdated = p_file->get_line().to_int() < CURRENT_METADATA_VERSION;
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}
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void EditorResourcePreview::_thread() {
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exited.clear();
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while (!exiting.is_set()) {
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preview_sem.wait();
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_iterate();
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}
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exited.set();
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}
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void EditorResourcePreview::_idle_callback() {
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if (!singleton) {
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// Just in case the shutdown of the editor involves the deletion of the singleton
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// happening while additional idle callbacks can happen.
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return;
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}
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// Process preview tasks, trying to leave a little bit of responsiveness worst case.
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uint64_t start = OS::get_singleton()->get_ticks_msec();
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while (!singleton->queue.is_empty() && OS::get_singleton()->get_ticks_msec() - start < 100) {
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singleton->_iterate();
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}
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}
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void EditorResourcePreview::_update_thumbnail_sizes() {
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if (small_thumbnail_size == -1) {
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// Kind of a workaround to retrieve the default icon size.
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small_thumbnail_size = EditorNode::get_singleton()->get_editor_theme()->get_icon(SNAME("Object"), EditorStringName(EditorIcons))->get_width();
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}
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}
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void EditorResourcePreview::queue_edited_resource_preview(const Ref<Resource> &p_res, Object *p_receiver, const StringName &p_receiver_func, const Variant &p_userdata) {
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ERR_FAIL_NULL(p_receiver);
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ERR_FAIL_COND(!p_res.is_valid());
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_update_thumbnail_sizes();
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{
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MutexLock lock(preview_mutex);
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String path_id = "ID:" + itos(p_res->get_instance_id());
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if (cache.has(path_id) && cache[path_id].last_hash == p_res->hash_edited_version_for_preview()) {
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p_receiver->call(p_receiver_func, path_id, cache[path_id].preview, cache[path_id].small_preview, p_userdata);
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return;
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}
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cache.erase(path_id); //erase if exists, since it will be regen
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QueueItem item;
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item.function = p_receiver_func;
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item.id = p_receiver->get_instance_id();
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item.resource = p_res;
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item.path = path_id;
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item.userdata = p_userdata;
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queue.push_back(item);
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}
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preview_sem.post();
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}
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void EditorResourcePreview::queue_resource_preview(const String &p_path, Object *p_receiver, const StringName &p_receiver_func, const Variant &p_userdata) {
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ERR_FAIL_NULL(p_receiver);
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_update_thumbnail_sizes();
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{
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MutexLock lock(preview_mutex);
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if (cache.has(p_path)) {
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p_receiver->call(p_receiver_func, p_path, cache[p_path].preview, cache[p_path].small_preview, p_userdata);
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return;
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}
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QueueItem item;
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item.function = p_receiver_func;
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item.id = p_receiver->get_instance_id();
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item.path = p_path;
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item.userdata = p_userdata;
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queue.push_back(item);
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}
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preview_sem.post();
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}
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void EditorResourcePreview::add_preview_generator(const Ref<EditorResourcePreviewGenerator> &p_generator) {
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preview_generators.push_back(p_generator);
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}
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void EditorResourcePreview::remove_preview_generator(const Ref<EditorResourcePreviewGenerator> &p_generator) {
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preview_generators.erase(p_generator);
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}
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EditorResourcePreview *EditorResourcePreview::get_singleton() {
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return singleton;
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}
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void EditorResourcePreview::_bind_methods() {
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ClassDB::bind_method(D_METHOD("queue_resource_preview", "path", "receiver", "receiver_func", "userdata"), &EditorResourcePreview::queue_resource_preview);
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ClassDB::bind_method(D_METHOD("queue_edited_resource_preview", "resource", "receiver", "receiver_func", "userdata"), &EditorResourcePreview::queue_edited_resource_preview);
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ClassDB::bind_method(D_METHOD("add_preview_generator", "generator"), &EditorResourcePreview::add_preview_generator);
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ClassDB::bind_method(D_METHOD("remove_preview_generator", "generator"), &EditorResourcePreview::remove_preview_generator);
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ClassDB::bind_method(D_METHOD("check_for_invalidation", "path"), &EditorResourcePreview::check_for_invalidation);
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|
|
|
ADD_SIGNAL(MethodInfo("preview_invalidated", PropertyInfo(Variant::STRING, "path")));
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}
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|
|
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void EditorResourcePreview::check_for_invalidation(const String &p_path) {
|
|
bool call_invalidated = false;
|
|
{
|
|
MutexLock lock(preview_mutex);
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|
|
|
if (cache.has(p_path)) {
|
|
uint64_t modified_time = FileAccess::get_modified_time(p_path);
|
|
if (modified_time != cache[p_path].modified_time) {
|
|
cache.erase(p_path);
|
|
call_invalidated = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (call_invalidated) { //do outside mutex
|
|
call_deferred(SNAME("emit_signal"), "preview_invalidated", p_path);
|
|
}
|
|
}
|
|
|
|
void EditorResourcePreview::start() {
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|
if (DisplayServer::get_singleton()->get_name() == "headless") {
|
|
return;
|
|
}
|
|
|
|
if (is_threaded()) {
|
|
ERR_FAIL_COND_MSG(thread.is_started(), "Thread already started.");
|
|
thread.start(_thread_func, this);
|
|
} else {
|
|
SceneTree *st = Object::cast_to<SceneTree>(OS::get_singleton()->get_main_loop());
|
|
ERR_FAIL_NULL_MSG(st, "Editor's MainLoop is not a SceneTree. This is a bug.");
|
|
st->add_idle_callback(&_idle_callback);
|
|
}
|
|
}
|
|
|
|
void EditorResourcePreview::stop() {
|
|
if (is_threaded()) {
|
|
if (thread.is_started()) {
|
|
exiting.set();
|
|
preview_sem.post();
|
|
|
|
for (int i = 0; i < preview_generators.size(); i++) {
|
|
preview_generators.write[i]->abort();
|
|
}
|
|
|
|
while (!exited.is_set()) {
|
|
OS::get_singleton()->delay_usec(10000);
|
|
RenderingServer::get_singleton()->sync(); //sync pending stuff, as thread may be blocked on rendering server
|
|
}
|
|
|
|
thread.wait_to_finish();
|
|
}
|
|
}
|
|
}
|
|
|
|
EditorResourcePreview::EditorResourcePreview() {
|
|
singleton = this;
|
|
}
|
|
|
|
EditorResourcePreview::~EditorResourcePreview() {
|
|
stop();
|
|
}
|