/*************************************************************************/
/*  renderer_canvas_render.cpp                                           */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/* "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 */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
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/*************************************************************************/

#include "renderer_canvas_render.h"
#include "servers/rendering/rendering_server_globals.h"

const Rect2 &RendererCanvasRender::Item::get_rect() const {
	if (custom_rect || (!rect_dirty && !update_when_visible)) {
		return rect;
	}

	//must update rect

	if (commands == nullptr) {
		rect = Rect2();
		rect_dirty = false;
		return rect;
	}

	Transform2D xf;
	bool found_xform = false;
	bool first = true;

	const Item::Command *c = commands;

	while (c) {
		Rect2 r;

		switch (c->type) {
			case Item::Command::TYPE_RECT: {
				const Item::CommandRect *crect = static_cast<const Item::CommandRect *>(c);
				r = crect->rect;

			} break;
			case Item::Command::TYPE_NINEPATCH: {
				const Item::CommandNinePatch *style = static_cast<const Item::CommandNinePatch *>(c);
				r = style->rect;
			} break;

			case Item::Command::TYPE_POLYGON: {
				const Item::CommandPolygon *polygon = static_cast<const Item::CommandPolygon *>(c);
				r = polygon->polygon.rect_cache;
			} break;
			case Item::Command::TYPE_PRIMITIVE: {
				const Item::CommandPrimitive *primitive = static_cast<const Item::CommandPrimitive *>(c);
				for (uint32_t j = 0; j < primitive->point_count; j++) {
					if (j == 0) {
						r.position = primitive->points[0];
					} else {
						r.expand_to(primitive->points[j]);
					}
				}
			} break;
			case Item::Command::TYPE_MESH: {
				const Item::CommandMesh *mesh = static_cast<const Item::CommandMesh *>(c);
				AABB aabb = RSG::mesh_storage->mesh_get_aabb(mesh->mesh, RID());

				r = Rect2(aabb.position.x, aabb.position.y, aabb.size.x, aabb.size.y);

			} break;
			case Item::Command::TYPE_MULTIMESH: {
				const Item::CommandMultiMesh *multimesh = static_cast<const Item::CommandMultiMesh *>(c);
				AABB aabb = RSG::mesh_storage->multimesh_get_aabb(multimesh->multimesh);

				r = Rect2(aabb.position.x, aabb.position.y, aabb.size.x, aabb.size.y);

			} break;
			case Item::Command::TYPE_PARTICLES: {
				const Item::CommandParticles *particles_cmd = static_cast<const Item::CommandParticles *>(c);
				if (particles_cmd->particles.is_valid()) {
					AABB aabb = RendererRD::ParticlesStorage::get_singleton()->particles_get_aabb(particles_cmd->particles);
					r = Rect2(aabb.position.x, aabb.position.y, aabb.size.x, aabb.size.y);
				}

			} break;
			case Item::Command::TYPE_TRANSFORM: {
				const Item::CommandTransform *transform = static_cast<const Item::CommandTransform *>(c);
				xf = transform->xform;
				found_xform = true;
				[[fallthrough]];
			}
			default: {
				c = c->next;
				continue;
			}
		}

		if (found_xform) {
			r = xf.xform(r);
		}

		if (first) {
			rect = r;
			first = false;
		} else {
			rect = rect.merge(r);
		}
		c = c->next;
	}

	rect_dirty = false;
	return rect;
}