如何dump SKP，SKP抓取

429  void SkiaPipeline::renderFrame(const LayerUpdateQueue& layers, const SkRect& clip,

430                                 const std::vector<sp<RenderNode>>& nodes, bool opaque,

431                                 const Rect& contentDrawBounds, sk_sp<SkSurface> surface,

432                                 const SkMatrix& preTransform) {

433      bool previousSkpEnabled = Properties::skpCaptureEnabled;

434      if (mPictureCapturedCallback) {

435          Properties::skpCaptureEnabled = true;

436      }

437 

438      // Initialize the canvas for the current frame, that might be a recording canvas if SKP

439      // capture is enabled.

440      SkCanvas* canvas = tryCapture(surface.get(), nodes[0].get(), layers);

441 

442      // draw all layers up front

443      renderLayersImpl(layers, opaque);

444 

445      renderFrameImpl(clip, nodes, opaque, contentDrawBounds, canvas, preTransform);

446 

447      endCapture(surface.get());

448 

449      if (CC_UNLIKELY(Properties::debugOverdraw)) {

450          renderOverdraw(clip, nodes, contentDrawBounds, surface, preTransform);

451      }

452 

453      ATRACE_NAME("flush commands");

454      surface->getCanvas()->flush();

455 

456      Properties::skpCaptureEnabled = previousSkpEnabled;

457  }

140  /**

141   * Allows to collect a recording of Skia drawing commands.

142   */

143  #define PROPERTY_CAPTURE_SKP_ENABLED "debug.hwui.capture_skp_enabled"

...

150  /**

151   * Defines how many frames in a sequence to capture.

152   */

153  #define PROPERTY_CAPTURE_SKP_FRAMES "debug.hwui.capture_skp_frames"

154 

155  /**

156   * File name and location, where a SKP recording will be saved.

157   */

158  #define PROPERTY_CAPTURE_SKP_FILENAME "debug.hwui.skp_filename"