QSGTexture* GuiTexture::removedFromAtlas() const {
if (this->isAtlasTexture()) {
if (!this->standalone) {
auto tex = this->texture_handle.texture;
auto sub = tex->get_subtexture(this->texture_handle.subid);
GLuint sub_texture_id = create_compatible_texture(tex->get_texture_id(), sub->w, sub->h);
std::array<GLuint, 2> fbo;
glGenFramebuffers(fbo.size(), &fbo.front());
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo[0]);
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, this->textureId(), 0);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo[1]);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, sub_texture_id, 0);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
glBlitFramebuffer(sub->x, sub->y, sub->x + sub->w, sub->y + sub->h, 0, 0, sub->w, sub->h, GL_COLOR_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteFramebuffers(fbo.size(), &fbo.front());
this->standalone = make_standalone_subtexture(sub_texture_id, QSize(sub->w, sub->h));
}
return this->standalone.get();
}
return nullptr;
}
bool get_subtexture(const dictionary_t& parameters, name_t name, GG::SubTexture& subtexture)
{
any_regular_t value;
if (!get_value(parameters, name, value))
return false;
return get_subtexture(value, subtexture);
}
QRectF GuiTexture::normalizedTextureSubRect() const {
if (this->isAtlasTexture()) {
auto tex = this->texture_handle.texture;
auto sub = tex->get_subtexture(this->texture_handle.subid);
return QTransform::fromScale(tex->w, tex->h).inverted().mapRect(QRectF(sub->x, sub->y, sub->w, sub->h));
} else {
return QSGTexture::normalizedTextureSubRect();
}
}
