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xo-imgui: ex2: control animation speed + alloc/cycle

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This commit is contained in:
Roland Conybeare 2025-08-24 18:16:09 -04:00
commit ecac429c52
1 changed files with 30 additions and 9 deletions
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39
xo-imgui/example/ex2/imgui_ex2.cpp
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@ -211,8 +211,10 @@ public:
GcStateDescription snapshot_gc_state() const;
void generate_random_mutation();
void generate_random_mutations();
public:
int alloc_per_cycle_ = 1;
up<GC> gc_;
std::size_t next_int_ = 0;
std::size_t next_root_ = 0;
@ -330,6 +332,13 @@ AppState::generate_random_mutation() {
this->next_root_ = 0;
}
void
AppState::generate_random_mutations() {
for (int i = 0; i < this->alloc_per_cycle_; ++i) {
this->generate_random_mutation();
}
}
void
draw_filled_rect_with_label(const char * text,
const char * tooltip,
@ -1242,6 +1251,10 @@ struct DrawState {
draw_state_type state_type_ = draw_state_type::alloc;
/** budgeted time period over which to animate gc copy **/
int animate_copy_budget_ms_ = 2000;
/** start time of current copy animation **/
std::chrono::steady_clock::time_point animate_copy_t0_;
/** when animating copy step, display objects from AppState::copy_detail_v_[i]
* where i < .animate_copy_hi_ / 100 * AppState::copy_detail_v_.size()
**/
@ -1521,15 +1534,17 @@ int main(int, char **)
case draw_state_type::alloc:
{
/** generate random alloc **/
app_state.generate_random_mutation();
app_state.generate_random_mutations();
gcstate = app_state.snapshot_gc_state();
/* GC may run here, in which case control reenters via AnimateGcCopyCb;
* that callback captures copy details (per object!) in AppState
*/
if (app_state.gc_->enable_gc_once())
if (app_state.gc_->enable_gc_once()) {
draw_state.state_type_ = draw_state_type::animate_gc;
draw_state.animate_copy_t0_ = std::chrono::steady_clock::now();
}
break;
}
@ -1598,15 +1613,17 @@ int main(int, char **)
static int counter = 0;
ImGui::Begin("Hello, world!");
ImGui::Text("This is totes useful text...");
//ImGui::Text("This is totes useful text...");
ImGui::Checkbox("demo window", &show_demo_window);
ImGui::Checkbox("second window", &show_another_window);
//ImGui::Checkbox("second window", &show_another_window);
ImGui::SliderFloat("float", &counter_value, 0.0f, 1.0f);
ImGui::ColorEdit3("clear color", (float*)&clear_color);
ImGui::SliderInt("alloc/cycle", &app_state.alloc_per_cycle_, 1, 100);
ImGui::SliderInt("copy animation budget", &draw_state.animate_copy_budget_ms_, 10, 5000);
//ImGui::SliderFloat("alloc/cycle", &alloc_per_cycle, 0.0f, 1.0f);
//ImGui::ColorEdit3("clear color", (float*)&clear_color);
if (ImGui::Button("Button"))
++counter;
//if (ImGui::Button("Button"))
// ++counter;
ImGui::NewLine(); // ImGui::SameLine()
/* N\u2080 = N0, N\u2081 = N1 */
ImGui::Text("alloc [%lu] avail [%lu] ",
@ -1644,7 +1661,11 @@ int main(int, char **)
&draw_state.gcw_tenured_alloc_rect_);
if (draw_state.state_type_ == draw_state_type::animate_gc) {
draw_state.animate_copy_hi_pct_ += 0.25;
auto animate_copy_t1 = std::chrono::steady_clock::now();
auto animate_dt = animate_copy_t1 - draw_state.animate_copy_t0_;
float animate_fraction_spent = std::chrono::duration_cast<std::chrono::milliseconds>(animate_dt).count() / static_cast<float>(draw_state.animate_copy_budget_ms_);
draw_state.animate_copy_hi_pct_ = 100.0 * animate_fraction_spent;
animate_gc_copy(app_state,
draw_state,
draw_list);