void State::initializeZeroTextures(const TextureMap &zeroTextures)
{
for (TextureMap::const_iterator i = zeroTextures.begin(); i != zeroTextures.end(); i++)
{
TextureBindingVector &samplerTextureArray = mSamplerTextures[i->first];
for (size_t textureUnit = 0; textureUnit < samplerTextureArray.size(); ++textureUnit)
{
samplerTextureArray[textureUnit].set(i->second.get());
}
}
}
void State::detachTexture(const TextureMap &zeroTextures, GLuint texture)
{
// Textures have a detach method on State rather than a simple
// removeBinding, because the zero/null texture objects are managed
// separately, and don't have to go through the Context's maps or
// the ResourceManager.
// [OpenGL ES 2.0.24] section 3.8 page 84:
// If a texture object is deleted, it is as if all texture units which are bound to that texture object are
// rebound to texture object zero
for (TextureBindingMap::iterator bindingVec = mSamplerTextures.begin(); bindingVec != mSamplerTextures.end(); bindingVec++)
{
GLenum textureType = bindingVec->first;
TextureBindingVector &textureVector = bindingVec->second;
for (size_t textureIdx = 0; textureIdx < textureVector.size(); textureIdx++)
{
BindingPointer<Texture> &binding = textureVector[textureIdx];
if (binding.id() == texture)
{
auto it = zeroTextures.find(textureType);
ASSERT(it != zeroTextures.end());
// Zero textures are the "default" textures instead of NULL
binding.set(it->second.get());
}
}
}
// [OpenGL ES 2.0.24] section 4.4 page 112:
// If a texture object is deleted while its image is attached to the currently bound framebuffer, then it is
// as if Texture2DAttachment had been called, with a texture of 0, for each attachment point to which this
// image was attached in the currently bound framebuffer.
if (mReadFramebuffer)
{
mReadFramebuffer->detachTexture(texture);
}
if (mDrawFramebuffer)
{
mDrawFramebuffer->detachTexture(texture);
}
}