bool Texture::create(unsigned int width, unsigned int height)
{
// Check if texture parameters are valid before creating it
if ((width == 0) || (height == 0))
{
err() << "Failed to create texture, invalid size (" << width << "x" << height << ")" << std::endl;
return false;
}
// Compute the internal texture dimensions depending on NPOT textures support
Vector2u actualSize(getValidSize(width), getValidSize(height));
// Check the maximum texture size
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.x = width;
m_size.y = height;
m_actualSize = actualSize;
m_pixelsFlipped = false;
// Create the OpenGL texture if it doesn't exist yet
if (!m_texture)
{
GLuint texture;
glCheck(glGenTextures(1, &texture));
m_texture = static_cast<unsigned int>(texture);
}
// Make sure that the current texture binding will be preserved
priv::TextureSaver save;
// Initialize the texture
glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));
glCheck(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_actualSize.x, m_actualSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, m_isRepeated ? GL_REPEAT : GL_CLAMP));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, m_isRepeated ? GL_REPEAT :GL_CLAMP));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));
m_cacheId = getUniqueId();
return true;
}
bool Texture::create(unsigned int width, unsigned int height)
{
// Check if texture parameters are valid before creating it
if ((width == 0) || (height == 0))
{
err() << "Failed to create texture, invalid size (" << width << "x" << height << ")" << std::endl;
return false;
}
// Compute the internal texture dimensions depending on NPOT textures support
Vector2u actualSize(getValidSize(width), getValidSize(height));
// Check the maximum texture size
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.x = width;
m_size.y = height;
m_actualSize = actualSize;
m_pixelsFlipped = false;
m_fboAttachment = false;
TransientContextLock lock;
// Create the OpenGL texture if it doesn't exist yet
if (!m_texture)
{
GLuint texture;
glCheck(glGenTextures(1, &texture));
m_texture = static_cast<unsigned int>(texture);
}
// Make sure that extensions are initialized
priv::ensureExtensionsInit();
// Make sure that the current texture binding will be preserved
priv::TextureSaver save;
static bool textureEdgeClamp = GLEXT_texture_edge_clamp || GLEXT_EXT_texture_edge_clamp;
if (!m_isRepeated && !textureEdgeClamp)
{
static bool warned = false;
if (!warned)
{
err() << "OpenGL extension SGIS_texture_edge_clamp unavailable" << std::endl;
err() << "Artifacts may occur along texture edges" << std::endl;
err() << "Ensure that hardware acceleration is enabled if available" << std::endl;
warned = true;
}
}
static bool textureSrgb = GLEXT_texture_sRGB;
if (m_sRgb && !textureSrgb)
{
static bool warned = false;
if (!warned)
{
#ifndef SFML_OPENGL_ES
err() << "OpenGL extension EXT_texture_sRGB unavailable" << std::endl;
#else
err() << "OpenGL ES extension EXT_sRGB unavailable" << std::endl;
#endif
err() << "Automatic sRGB to linear conversion disabled" << std::endl;
warned = true;
}
m_sRgb = false;
}
// Initialize the texture
glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));
glCheck(glTexImage2D(GL_TEXTURE_2D, 0, (m_sRgb ? GLEXT_GL_SRGB8_ALPHA8 : GL_RGBA), m_actualSize.x, m_actualSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, m_isRepeated ? GL_REPEAT : (textureEdgeClamp ? GLEXT_GL_CLAMP_TO_EDGE : GLEXT_GL_CLAMP)));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, m_isRepeated ? GL_REPEAT : (textureEdgeClamp ? GLEXT_GL_CLAMP_TO_EDGE : GLEXT_GL_CLAMP)));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));
glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));
m_cacheId = getUniqueId();
m_hasMipmap = false;
return true;
}
