src/platform_win/win_painter.cpp


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#include "cru/platform/win/win_painter.hpp"

#include "cru/platform/win/exception.hpp"
#include "cru/platform/win/graph_manager.hpp"
#include "cru/platform/win/win_brush.hpp"
#include "cru/platform/win/win_geometry.hpp"
#include "cru/platform/win/win_native_window.hpp"
#include "cru/platform/win/window_render_target.hpp"

#include <cassert>

namespace cru::platform::win {
WinPainter::WinPainter(WinNativeWindow* window) {
  assert(window);
  window_ = window;
  const auto window_render_target = window_->GetWindowRenderTarget();
  render_target_ =
      window_render_target->GetGraphManager()->GetD2D1DeviceContext();
  window_render_target->SetAsTarget();
  render_target_->BeginDraw();
}

WinPainter::~WinPainter() {
  if (!IsDisposed()) {
    ThrowIfFailed(render_target_->EndDraw());
  }
}

void WinPainter::StrokeGeometry(Geometry* geometry, Brush* brush, float width) {
  assert(!IsDisposed());
  const auto g = dynamic_cast<WinGeometry*>(geometry);
  assert(g);
  const auto b = dynamic_cast<WinBrush*>(brush);
  assert(b);

  render_target_->DrawGeometry(g->GetNative(), b->GetD2DBrush(), width);
}

void WinPainter::FillGeometry(Geometry* geometry, Brush* brush) {
  assert(!IsDisposed());
  const auto g = dynamic_cast<WinGeometry*>(geometry);
  assert(g);
  const auto b = dynamic_cast<WinBrush*>(brush);
  assert(b);

  render_target_->FillGeometry(g->GetNative(), b->GetD2DBrush());
}

void WinPainter::EndDraw() {
  if (!IsDisposed()) {
    ThrowIfFailed(render_target_->EndDraw());
    render_target_ = nullptr;
    is_disposed = true;
  }
}
}  // namespace cru::platform::win