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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
      6 
      7 #include "ui/compositor/debug_utils.h"
      8 
      9 #include <cmath>
     10 #include <iomanip>
     11 #include <iostream>
     12 #include <string>
     13 
     14 #include "base/logging.h"
     15 #include "base/strings/utf_string_conversions.h"
     16 #include "ui/compositor/layer.h"
     17 #include "ui/gfx/interpolated_transform.h"
     18 #include "ui/gfx/point.h"
     19 #include "ui/gfx/point_conversions.h"
     20 #include "ui/gfx/transform.h"
     21 
     22 namespace ui {
     23 
     24 namespace {
     25 
     26 void PrintLayerHierarchyImp(const Layer* layer,
     27                             int indent,
     28                             gfx::Point mouse_location,
     29                             std::wostringstream* out) {
     30   std::string indent_str(indent, ' ');
     31 
     32   layer->transform().TransformPointReverse(&mouse_location);
     33   bool mouse_inside_layer_bounds = layer->bounds().Contains(mouse_location);
     34   mouse_location.Offset(-layer->bounds().x(), -layer->bounds().y());
     35 
     36   *out << UTF8ToWide(indent_str);
     37   if (mouse_inside_layer_bounds)
     38     *out << L'*';
     39   else
     40     *out << L' ';
     41 
     42   *out << UTF8ToWide(layer->name()) << L' ' << layer;
     43 
     44   switch (layer->type()) {
     45     case ui::LAYER_NOT_DRAWN:
     46       *out << L" not_drawn";
     47       break;
     48     case ui::LAYER_TEXTURED:
     49       *out << L" textured";
     50       if (layer->fills_bounds_opaquely())
     51         *out << L" opaque";
     52       break;
     53     case ui::LAYER_SOLID_COLOR:
     54       *out << L" solid";
     55       break;
     56   }
     57 
     58   if (!layer->visible())
     59     *out << L" !visible";
     60 
     61   std::string property_indent_str(indent+3, ' ');
     62   *out << L'\n' << UTF8ToWide(property_indent_str);
     63   *out << L"bounds: " << layer->bounds().x() << L',' << layer->bounds().y();
     64   *out << L' ' << layer->bounds().width() << L'x' << layer->bounds().height();
     65 
     66   if (layer->opacity() != 1.0f) {
     67     *out << L'\n' << UTF8ToWide(property_indent_str);
     68     *out << L"opacity: " << std::setprecision(2) << layer->opacity();
     69   }
     70 
     71   gfx::DecomposedTransform decomp;
     72   if (!layer->transform().IsIdentity() &&
     73       gfx::DecomposeTransform(&decomp, layer->transform())) {
     74     *out << L'\n' << UTF8ToWide(property_indent_str);
     75     *out << L"translation: " << std::fixed << decomp.translate[0];
     76     *out << L", " << decomp.translate[1];
     77 
     78     *out << L'\n' << UTF8ToWide(property_indent_str);
     79     *out << L"rotation: ";
     80     *out << std::acos(decomp.quaternion[3]) * 360.0 / M_PI;
     81 
     82     *out << L'\n' << UTF8ToWide(property_indent_str);
     83     *out << L"scale: " << decomp.scale[0];
     84     *out << L", " << decomp.scale[1];
     85   }
     86 
     87   *out << L'\n';
     88 
     89   for (size_t i = 0, count = layer->children().size(); i < count; ++i) {
     90     PrintLayerHierarchyImp(
     91         layer->children()[i], indent + 3, mouse_location, out);
     92   }
     93 }
     94 
     95 }  // namespace
     96 
     97 void PrintLayerHierarchy(const Layer* layer, gfx::Point mouse_location) {
     98   std::wostringstream out;
     99   out << L"Layer hierarchy:\n";
    100   PrintLayerHierarchyImp(layer, 0, mouse_location, &out);
    101   // Error so logs can be collected from end-users.
    102   LOG(ERROR) << out.str();
    103 }
    104 
    105 } // namespace ui
    106