Narrow stroke execution planning helpers

src/legacy_node_stroke_preview_execution_services.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include "paint_renderer/compositor.h"
+#include "renderer_api/renderer_api.h"
+
+#include <algorithm>
+#include <cstdint>
+
+namespace pp::panopainter {
+
+[[nodiscard]] inline pp::paint_renderer::CanvasStrokeFeedbackPlan plan_legacy_node_stroke_preview_feedback(
+    pp::renderer::RenderDeviceFeatures features,
+    int width,
+    int height) noexcept
+{
+    const auto plan = pp::paint_renderer::plan_canvas_stroke_feedback(
+        features,
+        pp::renderer::Extent2D {
+            .width = static_cast<std::uint32_t>(std::max(width, 0)),
+            .height = static_cast<std::uint32_t>(std::max(height, 0)),
+        });
+    if (plan) {
+        return plan.value();
+    }
+
+    pp::paint_renderer::CanvasStrokeFeedbackPlan fallback;
+    fallback.compatibility_fallback = true;
+    fallback.path = pp::paint_renderer::StrokeCompositePath::ping_pong_textures;
+    fallback.requires_auxiliary_texture = true;
+    return fallback;
+}
+
+[[nodiscard]] inline pp::paint_renderer::StrokePreviewCompositePlan plan_legacy_node_stroke_preview_composite(
+    bool uses_mixer,
+    bool uses_dual,
+    bool uses_pattern) noexcept
+{
+    return pp::paint_renderer::plan_stroke_preview_composite(
+        pp::paint_renderer::StrokePreviewCompositeRequest {
+            .uses_mixer = uses_mixer,
+            .uses_dual = uses_dual,
+            .uses_pattern = uses_pattern,
+        });
+}
+
+} // namespace pp::panopainter