RmlUi/Samples/invaders/src/DecoratorDefender.cpp

/*
 * This source file is part of RmlUi, the HTML/CSS Interface Middleware
 *
 * For the latest information, see http://github.com/mikke89/RmlUi
 *
 * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
 * Copyright (c) 2019 The RmlUi Team, and contributors
 *
 * 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 "DecoratorDefender.h"
#include <RmlUi/Core/Element.h>
#include <RmlUi/Core/Texture.h>
#include <RmlUi/Core/Math.h>
#include <ShellOpenGL.h>

DecoratorDefender::~DecoratorDefender()
{
}

bool DecoratorDefender::Initialise(const Rml::Core::String& image_source, const Rml::Core::String& image_path)
{
	image_index = LoadTexture(image_source, image_path);
	if (image_index == -1)
	{
		return false;
	}

	return true;
}

/// Called on a decorator to generate any required per-element data for a newly decorated element.
Rml::Core::DecoratorDataHandle DecoratorDefender::GenerateElementData(Rml::Core::Element* RMLUI_UNUSED_PARAMETER(element)) const
{
	RMLUI_UNUSED(element);

	return Rml::Core::Decorator::INVALID_DECORATORDATAHANDLE;
}

// Called to release element data generated by this decorator.
void DecoratorDefender::ReleaseElementData(Rml::Core::DecoratorDataHandle RMLUI_UNUSED_PARAMETER(element_data)) const
{
	RMLUI_UNUSED(element_data);
}

// Called to render the decorator on an element.
void DecoratorDefender::RenderElement(Rml::Core::Element* element, Rml::Core::DecoratorDataHandle RMLUI_UNUSED_PARAMETER(element_data)) const
{
	RMLUI_UNUSED(element_data);

	Rml::Core::Vector2f position = element->GetAbsoluteOffset(Rml::Core::Box::PADDING).Round();
	Rml::Core::Vector2f size = element->GetBox().GetSize(Rml::Core::Box::PADDING).Round();

	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D, (GLuint) GetTexture(image_index)->GetHandle(element->GetRenderInterface()));
	Rml::Core::Colourb colour = element->GetProperty< Rml::Core::Colourb >("color");
	glColor4ubv(colour);
	glBegin(GL_QUADS);

		glVertex2f(position.x, position.y);
		glTexCoord2f(0, 1);

		glVertex2f(position.x, position.y + size.y);
		glTexCoord2f(1, 1);

		glVertex2f(position.x + size.x, position.y + size.y);
		glTexCoord2f(1, 0);

		glVertex2f(position.x + size.x, position.y);
		glTexCoord2f(0, 0);

	glEnd();
	glColor4ub(255, 255, 255, 255);
}