Method resize

src/SFML/Graphics/Texture.cpp:240–350

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bool Texture::resize(Vector2u size, bool sRgb)
{
    // Check if texture parameters are valid before creating it
    if ((size.x == 0) || (size.y == 0))
    {
        err() << "Failed to resize texture, invalid size (" << size.x << "x" << size.y << ")" << std::endl;
        return false;
    }

    const TransientContextLock lock;

    // Make sure that extensions are initialized
    priv::ensureExtensionsInit();

    // Compute the internal texture dimensions depending on NPOT textures support
    const Vector2u actualSize(getValidSize(size.x), getValidSize(size.y));

    // Check the maximum texture size
    const unsigned int maxSize = getMaximumSize();
    if ((actualSize.x > maxSize) || (actualSize.y > maxSize))
    {
        err() << "Failed to create texture, its internal size is too high "
              << "(" << actualSize.x << "x" << actualSize.y << ", "
              << "maximum is " << maxSize << "x" << maxSize << ")" << std::endl;
        return false;
    }

    // All the validity checks passed, we can store the new texture settings
    m_size          = size;
    m_actualSize    = actualSize;
    m_pixelsFlipped = false;
    m_fboAttachment = false;

    // Create the OpenGL texture if it doesn't exist yet
    if (!m_texture)
    {
        GLuint texture = 0;
        glCheck(glGenTextures(1, &texture));
        m_texture = texture;
    }

    // Make sure that the current texture binding will be preserved
    const priv::TextureSaver save;

    static const bool textureEdgeClamp = GLEXT_texture_edge_clamp || GLEXT_GL_VERSION_1_2 ||
                                         Context::isExtensionAvailable("GL_EXT_texture_edge_clamp");

    if (!textureEdgeClamp)
    {
        static bool warned = false;

        if (!warned)
        {
            err() << "OpenGL extension SGIS_texture_edge_clamp unavailable" << '\n'
                  << "Artifacts may occur along texture edges" << '\n'
                  << "Ensure that hardware acceleration is enabled if available" << std::endl;

            warned = true;