SFML/src/SFML/Graphics/Sprite.cpp at master · githubhy/SFML · GitHub

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////////////////////////////////////////////////////////////

// SFML - Simple and Fast Multimedia Library

// This software is provided 'as-is', without any express or implied warranty.

// In no event will the authors be held liable for any damages arising from the use of this software.

// Permission is granted to anyone to use this software for any purpose,

// including commercial applications, and to alter it and redistribute it freely,

// subject to the following restrictions:

// 1. The origin of this software must not be misrepresented;

// you must not claim that you wrote the original software.

// If you use this software in a product, an acknowledgment

// in the product documentation would be appreciated but is not required.

// 2. Altered source versions must be plainly marked as such,

// and must not be misrepresented as being the original software.

// 3. This notice may not be removed or altered from any source distribution.

////////////////////////////////////////////////////////////

// Headers

////////////////////////////////////////////////////////////

#include <SFML/Graphics/RenderTarget.hpp>

#include <SFML/Graphics/Sprite.hpp>

#include <SFML/Graphics/Texture.hpp>

#include <cmath>

namespace sf

{

////////////////////////////////////////////////////////////

Sprite::Sprite(const Texture& texture) : Sprite(texture, IntRect({0, 0}, Vector2i(texture.getSize())))

{

}

////////////////////////////////////////////////////////////

Sprite::Sprite(const Texture& texture, const IntRect& rectangle) : m_texture(&texture), m_textureRect(rectangle)

{

updateVertices();

}

////////////////////////////////////////////////////////////

void Sprite::setTexture(const Texture& texture, bool resetRect)

{

// Recompute the texture area if requested

if (resetRect)

setTextureRect(IntRect({0, 0}, Vector2i(texture.getSize())));

// Assign the new texture

m_texture = &texture;

}

////////////////////////////////////////////////////////////

void Sprite::setTextureRect(const IntRect& rectangle)

{

if (rectangle != m_textureRect)

{

m_textureRect = rectangle;

updateVertices();

}

////////////////////////////////////////////////////////////

void Sprite::setColor(const Color& color)

{

for (Vertex& vertex : m_vertices)

vertex.color = color;

}

////////////////////////////////////////////////////////////

const Texture& Sprite::getTexture() const

{

return *m_texture;

}

////////////////////////////////////////////////////////////

const IntRect& Sprite::getTextureRect() const

{

return m_textureRect;

}

////////////////////////////////////////////////////////////

const Color& Sprite::getColor() const

{

return m_vertices[0].color;

}

////////////////////////////////////////////////////////////

FloatRect Sprite::getLocalBounds() const

{

// Last vertex posiion is equal to texture rect size absolute value

return {{0.f, 0.f}, m_vertices[3].position};

}

////////////////////////////////////////////////////////////

FloatRect Sprite::getGlobalBounds() const

{

return getTransform().transformRect(getLocalBounds());

}

////////////////////////////////////////////////////////////

void Sprite::draw(RenderTarget& target, RenderStates states) const

{

states.transform *= getTransform();

states.texture = m_texture;

states.coordinateType = CoordinateType::Pixels;

target.draw(m_vertices.data(), m_vertices.size(), PrimitiveType::TriangleStrip, states);

}

////////////////////////////////////////////////////////////

void Sprite::updateVertices()

{

const auto [position, size] = FloatRect(m_textureRect);

// Absolute value is used to support negative texture rect sizes

const Vector2f absSize(std::abs(size.x), std::abs(size.y));

// Update positions

m_vertices[0].position = {0.f, 0.f};

m_vertices[1].position = {0.f, absSize.y};

m_vertices[2].position = {absSize.x, 0.f};

m_vertices[3].position = absSize;

// Update texture coordinates

m_vertices[0].texCoords = position;

m_vertices[1].texCoords = position + Vector2f(0.f, size.y);

m_vertices[2].texCoords = position + Vector2f(size.x, 0.f);

m_vertices[3].texCoords = position + size;

}

} // namespace sf

SFML/src/SFML/Graphics/Sprite.cpp at master · githubhy/SFML · GitHub

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