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SFML - Simple and Fast Multimedia Library

SFML v1.6

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Sprite.cpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila ([email protected])
//
// 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/Sprite.hpp>
#include <SFML/Graphics/Image.hpp>
#include <SFML/Graphics/GraphicsContext.hpp>


namespace sf
{
Sprite::Sprite() :
mySubRect   (0, 0, 1, 1),
myIsFlippedX(false),
myIsFlippedY(false)
{

}


Sprite::Sprite(const Image& Img, const Vector2f& Position, const Vector2f& Scale, float Rotation, const Color& Col) :
Drawable    (Position, Scale, Rotation, Col),
mySubRect   (0, 0, 1, 1),
myIsFlippedX(false),
myIsFlippedY(false)
{
    SetImage(Img);
}


void Sprite::SetImage(const Image& Img)
{
    // If there was no source image before and the new image is valid, adjust the source rectangle
    if (!myImage && (Img.GetWidth() > 0) && (Img.GetHeight() > 0))
    {
        SetSubRect(IntRect(0, 0, Img.GetWidth(), Img.GetHeight()));
    }

    // Assign the new image
    myImage = &Img;
}


void Sprite::SetSubRect(const IntRect& SubRect)
{
    mySubRect = SubRect;
}


void Sprite::Resize(float Width, float Height)
{
    int LocalWidth  = mySubRect.GetWidth();
    int LocalHeight = mySubRect.GetHeight();

    if ((LocalWidth > 0) && (LocalHeight > 0))
        SetScale(Width / LocalWidth, Height / LocalHeight);
}


void Sprite::Resize(const Vector2f& Size)
{
    Resize(Size.x, Size.y);
}


void Sprite::FlipX(bool Flipped)
{
    myIsFlippedX = Flipped;
}


void Sprite::FlipY(bool Flipped)
{
    myIsFlippedY = Flipped;
}


const Image* Sprite::GetImage() const
{
    return myImage;
}


const IntRect& Sprite::GetSubRect() const
{
    return mySubRect;
}


Vector2f Sprite::GetSize() const
{
    return Vector2f(mySubRect.GetWidth() * GetScale().x, mySubRect.GetHeight() * GetScale().y);
}


Color Sprite::GetPixel(unsigned int X, unsigned int Y) const
{
    if (myImage)
    {
        unsigned int ImageX = mySubRect.Left + X;
        unsigned int ImageY = mySubRect.Top  + Y;

        if (myIsFlippedX) ImageX = mySubRect.GetWidth()  - ImageX - 1;
        if (myIsFlippedY) ImageY = mySubRect.GetHeight() - ImageY - 1;

        return myImage->GetPixel(ImageX, ImageY) * GetColor();
    }
    else
    {
        return GetColor();
    }
}


void Sprite::Render(RenderTarget&) const
{
    // Get the sprite size
    float Width  = static_cast<float>(mySubRect.GetWidth());
    float Height = static_cast<float>(mySubRect.GetHeight());

    // Check if the image is valid
    if (myImage && (myImage->GetWidth() > 0) && (myImage->GetHeight() > 0))
    {
        // Use the "offset trick" to get pixel-perfect rendering
        // see http://www.opengl.org/resources/faq/technical/transformations.htm#tran0030
        GLCheck(glTranslatef(0.375f, 0.375f, 0.f));

        // Bind the texture
        myImage->Bind();

        // Calculate the texture coordinates
        FloatRect TexCoords = myImage->GetTexCoords(mySubRect);
        FloatRect Rect(myIsFlippedX ? TexCoords.Right  : TexCoords.Left,
                       myIsFlippedY ? TexCoords.Bottom : TexCoords.Top,
                       myIsFlippedX ? TexCoords.Left   : TexCoords.Right,
                       myIsFlippedY ? TexCoords.Top    : TexCoords.Bottom);

        // Draw the sprite's triangles
        glBegin(GL_QUADS);
            glTexCoord2f(Rect.Left,  Rect.Top);    glVertex2f(0,     0);
            glTexCoord2f(Rect.Left,  Rect.Bottom); glVertex2f(0,     Height);
            glTexCoord2f(Rect.Right, Rect.Bottom); glVertex2f(Width, Height);
            glTexCoord2f(Rect.Right, Rect.Top);    glVertex2f(Width, 0) ;
        glEnd();
    }
    else
    {
        // Disable texturing
        GLCheck(glDisable(GL_TEXTURE_2D));

        // Draw the sprite's triangles
        glBegin(GL_QUADS);
            glVertex2f(0,     0);
            glVertex2f(0,     Height);
            glVertex2f(Width, Height);
            glVertex2f(Width, 0);
        glEnd();
    }
}

} // namespace sf

 ::  Copyright © 2007-2008 Laurent Gomila, all rights reserved  ::  Documentation generated by doxygen 1.5.2  :: 

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Table of contents

• Main Page
• Class List
  • sf::AudioResource
  • sf::Clock
  • sf::Color
  • sf::Context
  • sf::Drawable
  • sf::Event
  • sf::Event::Event::JoyButtonEvent
  • sf::Event::Event::JoyMoveEvent
  • sf::Event::Event::KeyEvent
  • sf::Event::Event::MouseButtonEvent
  • sf::Event::Event::MouseMoveEvent
  • sf::Event::Event::MouseWheelEvent
  • sf::Event::Event::SizeEvent
  • sf::Event::Event::TextEvent
  • sf::Font
  • sf::Ftp
  • sf::Ftp::Ftp::DirectoryResponse
  • sf::Ftp::Ftp::ListingResponse
  • sf::Ftp::Ftp::Response
  • sf::Glyph
  • sf::Http
  • sf::Http::Http::Request
  • sf::Http::Http::Response
  • sf::Image
  • sf::Input
  • sf::IPAddress
  • sf::Listener
  • sf::Lock
  • sf::Matrix3
  • sf::Music
  • sf::Mutex
  • sf::NonCopyable
  • sf::Packet
  • sf::PostFX
  • sf::Randomizer
  • sf::Rect< T >
  • sf::RenderTarget
  • sf::RenderWindow
  • sf::Resource< T >
  • sf::ResourcePtr< T >
  • sf::Selector< Type >
  • sf::SelectorBase
  • sf::Shape
  • sf::SocketHelper
  • sf::SocketTCP
  • sf::SocketUDP
  • sf::Sound
  • sf::SoundBuffer
  • sf::SoundBufferRecorder
  • sf::SoundRecorder
  • sf::SoundStream
  • sf::SoundStream::SoundStream::Chunk
  • sf::Sprite
  • sf::String
  • sf::Thread
  • sf::Unicode
  • sf::Unicode::Unicode::Text
  • sf::Vector2< T >
  • sf::Vector3< T >
  • sf::VideoMode
  • sf::View
  • sf::Window
  • sf::WindowListener
  • sf::WindowSettings
• Class Hierarchy
  • sf::AudioResource
    • sf::Sound
      • sf::SoundStream
        • sf::Music
    • sf::SoundBuffer
  • sf::Clock
  • sf::Color
  • sf::Drawable
    • sf::PostFX
    • sf::Shape
    • sf::Sprite
    • sf::String
  • sf::Event
  • sf::Event::Event::JoyButtonEvent
  • sf::Event::Event::JoyMoveEvent
  • sf::Event::Event::KeyEvent
  • sf::Event::Event::MouseButtonEvent
  • sf::Event::Event::MouseMoveEvent
  • sf::Event::Event::MouseWheelEvent
  • sf::Event::Event::SizeEvent
  • sf::Event::Event::TextEvent
  • sf::Ftp::Ftp::Response
    • sf::Ftp::Ftp::DirectoryResponse
    • sf::Ftp::Ftp::ListingResponse
  • sf::Glyph
  • sf::Http::Http::Request
  • sf::Http::Http::Response
  • sf::IPAddress
  • sf::Listener
  • sf::Matrix3
  • sf::NonCopyable
    • sf::Context
    • sf::Ftp
    • sf::Http
    • sf::Input
    • sf::Lock
    • sf::Mutex
    • sf::Thread
      • sf::SoundRecorder
        • sf::SoundBufferRecorder
      • sf::SoundStream
    • sf::Window
      • sf::RenderWindow
  • sf::Packet
  • sf::Randomizer
  • sf::Rect< T >
  • sf::RenderTarget
    • sf::RenderWindow
  • sf::Resource< T >
  • sf::Resource< Font >
    • sf::Font
  • sf::Resource< Image >
    • sf::Image
  • sf::Resource< SoundBuffer >
    • sf::SoundBuffer
  • sf::ResourcePtr< T >
  • sf::SelectorBase
    • sf::Selector< Type >
  • sf::SocketHelper
  • sf::SocketTCP
  • sf::SocketUDP
  • sf::SoundStream::SoundStream::Chunk
  • sf::Unicode
  • sf::Unicode::Unicode::Text
  • sf::Vector2< T >
  • sf::Vector3< T >
  • sf::VideoMode
  • sf::View
  • sf::WindowListener
    • sf::Input
    • sf::Window
  • sf::WindowSettings
• Class Members
• Namespace List
  • sf::Blend
  • sf::Joy
  • sf::Key
  • sf::Mouse
  • sf::Style
• Namespace Members
• File List
  • Arial.hpp
  • Audio.hpp
  • AudioDevice.cpp
  • AudioDevice.hpp
  • AudioResource.cpp
  • AudioResource.hpp
  • Clock.cpp
  • Clock.hpp
  • Color.cpp
  • Color.hpp
  • Config.hpp
  • Context.cpp
  • Context.hpp
  • Doxygen.hpp
  • Drawable.cpp
  • Drawable.hpp
  • Event.hpp
  • Font.cpp
  • Font.hpp
  • FontLoader.cpp
  • FontLoader.hpp
  • Ftp.cpp
  • Ftp.hpp
  • Glyph.hpp
  • Graphics.hpp
  • GraphicsContext.cpp
  • GraphicsContext.hpp
  • Http.cpp
  • Http.hpp
  • Image.cpp
  • Image.hpp
  • ImageLoader.cpp
  • ImageLoader.hpp
  • Input.cpp
  • Input.hpp
  • IPAddress.cpp
  • IPAddress.hpp
  • Cocoa/Joystick.cpp
  • Template for new ports/Joystick.cpp
  • Win32/Joystick.cpp
  • Cocoa/Joystick.hpp
  • Joystick.hpp
  • Template for new ports/Joystick.hpp
  • Win32/Joystick.hpp
  • Listener.cpp
  • Listener.hpp
  • Lock.cpp
  • Lock.hpp
  • Matrix3.cpp
  • Matrix3.hpp
  • Matrix3.inl
  • Music.cpp
  • Music.hpp
  • Mutex.cpp
  • Mutex.hpp
  • Win32/Mutex.hpp
  • Network.hpp
  • NonCopyable.hpp
  • OpenAL.hpp
  • OpenGL.hpp
  • Packet.cpp
  • Packet.hpp
  • Platform.cpp
  • Platform.hpp
  • Win32/Platform.hpp
  • PostFX.cpp
  • PostFX.hpp
  • Randomizer.cpp
  • Randomizer.hpp
  • Rect.hpp
  • Rect.inl
  • RenderTarget.cpp
  • RenderTarget.hpp
  • RenderWindow.cpp
  • RenderWindow.hpp
  • Resource.hpp
  • Resource.inl
  • ResourcePtr.inl
  • Selector.hpp
  • Selector.inl
  • SelectorBase.cpp
  • SelectorBase.hpp
  • SFML_Main.cpp
  • Shape.cpp
  • Shape.hpp
  • Sleep.cpp
  • Sleep.hpp
  • SocketHelper.cpp
  • SocketHelper.hpp
  • Win32/SocketHelper.hpp
  • Sockets.hpp
  • SocketTCP.cpp
  • SocketTCP.hpp
  • SocketUDP.cpp
  • SocketUDP.hpp
  • Sound.cpp
  • Sound.hpp
  • SoundBuffer.cpp
  • SoundBuffer.hpp
  • SoundBufferRecorder.cpp
  • SoundBufferRecorder.hpp
  • SoundFile.cpp
  • SoundFile.hpp
  • SoundFileDefault.cpp
  • SoundFileDefault.hpp
  • SoundFileOgg.cpp
  • SoundFileOgg.hpp
  • SoundRecorder.cpp
  • SoundRecorder.hpp
  • SoundStream.cpp
  • SoundStream.hpp
  • Sprite.cpp
  • Sprite.hpp
  • String.cpp
  • String.hpp
  • System.hpp
  • Thread.cpp
  • Thread.hpp
  • Win32/Thread.hpp
  • Unicode.cpp
  • Unicode.hpp
  • Unicode.inl
  • Vector2.hpp
  • Vector2.inl
  • Vector3.hpp
  • Vector3.inl
  • VideoMode.cpp
  • VideoMode.hpp
  • Cocoa/VideoModeSupport.cpp
  • Template for new ports/VideoModeSupport.cpp
  • Win32/VideoModeSupport.cpp
  • Cocoa/VideoModeSupport.hpp
  • Template for new ports/VideoModeSupport.hpp
  • VideoModeSupport.hpp
  • Win32/VideoModeSupport.hpp
  • View.cpp
  • View.hpp
  • Window.cpp
  • Window/Window.hpp
  • Window.hpp
  • WindowHandle.hpp
  • WindowImpl.cpp
  • WindowImpl.hpp
  • WindowImplCocoa.hpp
  • WindowImplWin32.cpp
  • WindowImplWin32.hpp
  • WindowImplXXX.cpp
  • WindowImplXXX.hpp
  • WindowListener.hpp
  • WindowSettings.hpp
  • WindowStyle.hpp

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