void Shader::setParameter(const std::string& name, const Texture& texture)
{
if (m_shaderProgram)
{
ensureGlContext();
// Find the location of the variable in the shader
int location = glGetUniformLocationARB(m_shaderProgram, name.c_str());
if (location == -1)
{
err() << "Texture \"" << name << "\" not found in shader" << std::endl;
return;
}
// Store the location -> texture mapping
TextureTable::iterator it = m_textures.find(location);
if (it == m_textures.end())
{
// New entry, make sure there are enough texture units
static const GLint maxUnits = getMaxTextureUnits();
if (m_textures.size() + 1 >= static_cast<std::size_t>(maxUnits))
{
err() << "Impossible to use texture \"" << name << "\" for shader: all available texture units are used" << std::endl;
return;
}
m_textures[location] = &texture;
}
else
{
// Location already used, just replace the texture
it->second = &texture;
}
}
}
void Shader::setParameter(const std::string &name, const Texture &texture) {
if (mShaderProgram) {
ensureGLContext();
GLint location = getParamLocation(name);
if (location != -1) {
TextureTable::iterator it = mTextures.find(location);
if (it == mTextures.end()) {
GLint maxUnits = getMaxTextureUnits();
if (mTextures.size() + 1 >= staticCast_t(maxUnits)) {
std::cerr << "Imposible to use texture \"" << name << "\" for shader, all available texture units are used.\n";
return;
}
mTextures[location] = &texture;
} else {
it->second = &texture;
}
}
}
}
