godot/scene/gui/texture_rect.cpp

/*************************************************************************/
/*  texture_rect.cpp                                                     */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
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#include "texture_rect.h"
#include "servers/visual_server.h"

void TextureRect::_notification(int p_what) {

	if (p_what == NOTIFICATION_DRAW) {

		if (texture.is_null())
			return;

		switch (stretch_mode) {
			case STRETCH_SCALE_ON_EXPAND: {
				Size2 s = expand ? get_size() : texture->get_size();
				draw_texture_rect(texture, Rect2(Point2(), s), false);
			} break;
			case STRETCH_SCALE: {
				draw_texture_rect(texture, Rect2(Point2(), get_size()), false);
			} break;
			case STRETCH_TILE: {
				draw_texture_rect(texture, Rect2(Point2(), get_size()), true);
			} break;
			case STRETCH_KEEP: {
				draw_texture_rect(texture, Rect2(Point2(), texture->get_size()), false);

			} break;
			case STRETCH_KEEP_CENTERED: {

				Vector2 ofs = (get_size() - texture->get_size()) / 2;
				draw_texture_rect(texture, Rect2(ofs, texture->get_size()), false);
			} break;
			case STRETCH_KEEP_ASPECT_CENTERED:
			case STRETCH_KEEP_ASPECT: {

				Size2 size = get_size();
				int tex_width = texture->get_width() * size.height / texture->get_height();
				int tex_height = size.height;

				if (tex_width > size.width) {
					tex_width = size.width;
					tex_height = texture->get_height() * tex_width / texture->get_width();
				}

				int ofs_x = 0;
				int ofs_y = 0;

				if (stretch_mode == STRETCH_KEEP_ASPECT_CENTERED) {
					ofs_x += (size.width - tex_width) / 2;
					ofs_y += (size.height - tex_height) / 2;
				}

				draw_texture_rect(texture, Rect2(ofs_x, ofs_y, tex_width, tex_height));
			} break;
			case STRETCH_KEEP_ASPECT_COVERED: {
				Size2 size = get_size();
				Size2 tex_size = texture->get_size();
				Size2 scaleSize(size.width / tex_size.width, size.height / tex_size.height);
				float scale = scaleSize.width > scaleSize.height ? scaleSize.width : scaleSize.height;
				Size2 scaledTexSize = tex_size * scale;
				Point2 ofs = ((scaledTexSize - size) / scale).abs() / 2.0f;
				draw_texture_rect_region(texture, Rect2(Point2(), size), Rect2(ofs, size / scale));
			} break;
		}
	}
}

Size2 TextureRect::get_minimum_size() const {

	if (!expand && !texture.is_null())
		return texture->get_size();
	else
		return Size2();
}
void TextureRect::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_texture", "texture"), &TextureRect::set_texture);
	ClassDB::bind_method(D_METHOD("get_texture"), &TextureRect::get_texture);
	ClassDB::bind_method(D_METHOD("set_expand", "enable"), &TextureRect::set_expand);
	ClassDB::bind_method(D_METHOD("has_expand"), &TextureRect::has_expand);
	ClassDB::bind_method(D_METHOD("set_stretch_mode", "stretch_mode"), &TextureRect::set_stretch_mode);
	ClassDB::bind_method(D_METHOD("get_stretch_mode"), &TextureRect::get_stretch_mode);

	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_texture", "get_texture");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "expand"), "set_expand", "has_expand");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "stretch_mode", PROPERTY_HINT_ENUM, "Scale On Expand (Compat),Scale,Tile,Keep,Keep Centered,Keep Aspect,Keep Aspect Centered,Keep Aspect Covered"), "set_stretch_mode", "get_stretch_mode");

	BIND_ENUM_CONSTANT(STRETCH_SCALE_ON_EXPAND);
	BIND_ENUM_CONSTANT(STRETCH_SCALE);
	BIND_ENUM_CONSTANT(STRETCH_TILE);
	BIND_ENUM_CONSTANT(STRETCH_KEEP);
	BIND_ENUM_CONSTANT(STRETCH_KEEP_CENTERED);
	BIND_ENUM_CONSTANT(STRETCH_KEEP_ASPECT);
	BIND_ENUM_CONSTANT(STRETCH_KEEP_ASPECT_CENTERED);
	BIND_ENUM_CONSTANT(STRETCH_KEEP_ASPECT_COVERED);
}

void TextureRect::set_texture(const Ref<Texture> &p_tex) {

	texture = p_tex;
	update();
	/*
	if (texture.is_valid())
		texture->set_flags(texture->get_flags()&(~Texture::FLAG_REPEAT)); //remove repeat from texture, it looks bad in sprites
	*/
	minimum_size_changed();
}

Ref<Texture> TextureRect::get_texture() const {

	return texture;
}

void TextureRect::set_expand(bool p_expand) {

	expand = p_expand;
	update();
	minimum_size_changed();
}
bool TextureRect::has_expand() const {

	return expand;
}

void TextureRect::set_stretch_mode(StretchMode p_mode) {

	stretch_mode = p_mode;
	update();
}

TextureRect::StretchMode TextureRect::get_stretch_mode() const {

	return stretch_mode;
}

TextureRect::TextureRect() {

	expand = false;
	set_mouse_filter(MOUSE_FILTER_PASS);
	stretch_mode = STRETCH_SCALE_ON_EXPAND;
}

TextureRect::~TextureRect() {
}