root/content/common/cc_messages.cc

DEFINITIONS

1. Write
2. Read
3. Log
4. Write
5. Read
6. Log
7. Write
8. Read
9. Log
10. Write
11. Read
12. Log
13. Write
14. ReserveSizeForRenderPassWrite
15. ReadDrawQuad
16. Read
17. Log
18. Write
19. Read
20. Log
21. Write
22. Read
23. Log
24. Write
25. Read
26. Log
27. Write
28. Read
29. Log

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/common/cc_messages.h"

#include "base/command_line.h"
#include "cc/output/compositor_frame.h"
#include "cc/output/filter_operations.h"
#include "content/public/common/common_param_traits.h"
#include "content/public/common/content_switches.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkFlattenableSerialization.h"
#include "ui/gfx/transform.h"

namespace IPC {

void ParamTraits<cc::FilterOperation>::Write(
    Message* m, const param_type& p) {
  WriteParam(m, p.type());
  switch (p.type()) {
    case cc::FilterOperation::GRAYSCALE:
    case cc::FilterOperation::SEPIA:
    case cc::FilterOperation::SATURATE:
    case cc::FilterOperation::HUE_ROTATE:
    case cc::FilterOperation::INVERT:
    case cc::FilterOperation::BRIGHTNESS:
    case cc::FilterOperation::SATURATING_BRIGHTNESS:
    case cc::FilterOperation::CONTRAST:
    case cc::FilterOperation::OPACITY:
    case cc::FilterOperation::BLUR:
      WriteParam(m, p.amount());
      break;
    case cc::FilterOperation::DROP_SHADOW:
      WriteParam(m, p.drop_shadow_offset());
      WriteParam(m, p.amount());
      WriteParam(m, p.drop_shadow_color());
      break;
    case cc::FilterOperation::COLOR_MATRIX:
      for (int i = 0; i < 20; ++i)
        WriteParam(m, p.matrix()[i]);
      break;
    case cc::FilterOperation::ZOOM:
      WriteParam(m, p.amount());
      WriteParam(m, p.zoom_inset());
      break;
    case cc::FilterOperation::REFERENCE:
      WriteParam(m, p.image_filter());
      break;
  }
}

bool ParamTraits<cc::FilterOperation>::Read(
    const Message* m, PickleIterator* iter, param_type* r) {
  cc::FilterOperation::FilterType type;
  float amount;
  gfx::Point drop_shadow_offset;
  SkColor drop_shadow_color;
  SkScalar matrix[20];
  int zoom_inset;

  if (!ReadParam(m, iter, &type))
    return false;
  r->set_type(type);

  bool success = false;
  switch (type) {
    case cc::FilterOperation::GRAYSCALE:
    case cc::FilterOperation::SEPIA:
    case cc::FilterOperation::SATURATE:
    case cc::FilterOperation::HUE_ROTATE:
    case cc::FilterOperation::INVERT:
    case cc::FilterOperation::BRIGHTNESS:
    case cc::FilterOperation::SATURATING_BRIGHTNESS:
    case cc::FilterOperation::CONTRAST:
    case cc::FilterOperation::OPACITY:
    case cc::FilterOperation::BLUR:
      if (ReadParam(m, iter, &amount)) {
        r->set_amount(amount);
        success = true;
      }
      break;
    case cc::FilterOperation::DROP_SHADOW:
      if (ReadParam(m, iter, &drop_shadow_offset) &&
          ReadParam(m, iter, &amount) &&
          ReadParam(m, iter, &drop_shadow_color)) {
        r->set_drop_shadow_offset(drop_shadow_offset);
        r->set_amount(amount);
        r->set_drop_shadow_color(drop_shadow_color);
        success = true;
      }
      break;
    case cc::FilterOperation::COLOR_MATRIX: {
      int i;
      for (i = 0; i < 20; ++i) {
        if (!ReadParam(m, iter, &matrix[i]))
          break;
      }
      if (i == 20) {
        r->set_matrix(matrix);
        success = true;
      }
      break;
    }
    case cc::FilterOperation::ZOOM:
      if (ReadParam(m, iter, &amount) &&
          ReadParam(m, iter, &zoom_inset) &&
          amount >= 0.f &&
          zoom_inset >= 0) {
        r->set_amount(amount);
        r->set_zoom_inset(zoom_inset);
        success = true;
      }
      break;
    case cc::FilterOperation::REFERENCE: {
      skia::RefPtr<SkImageFilter> filter;
      if (!ReadParam(m, iter, &filter)) {
        success = false;
        break;
      }
      r->set_image_filter(filter);
      success = true;
      break;
    }
  }
  return success;
}

void ParamTraits<cc::FilterOperation>::Log(
    const param_type& p, std::string* l) {
  l->append("(");
  LogParam(static_cast<unsigned>(p.type()), l);
  l->append(", ");

  switch (p.type()) {
    case cc::FilterOperation::GRAYSCALE:
    case cc::FilterOperation::SEPIA:
    case cc::FilterOperation::SATURATE:
    case cc::FilterOperation::HUE_ROTATE:
    case cc::FilterOperation::INVERT:
    case cc::FilterOperation::BRIGHTNESS:
    case cc::FilterOperation::SATURATING_BRIGHTNESS:
    case cc::FilterOperation::CONTRAST:
    case cc::FilterOperation::OPACITY:
    case cc::FilterOperation::BLUR:
      LogParam(p.amount(), l);
      break;
    case cc::FilterOperation::DROP_SHADOW:
      LogParam(p.drop_shadow_offset(), l);
      l->append(", ");
      LogParam(p.amount(), l);
      l->append(", ");
      LogParam(p.drop_shadow_color(), l);
      break;
    case cc::FilterOperation::COLOR_MATRIX:
      for (int i = 0; i < 20; ++i) {
        if (i)
          l->append(", ");
        LogParam(p.matrix()[i], l);
      }
      break;
    case cc::FilterOperation::ZOOM:
      LogParam(p.amount(), l);
      l->append(", ");
      LogParam(p.zoom_inset(), l);
      break;
    case cc::FilterOperation::REFERENCE:
      LogParam(p.image_filter(), l);
      break;
  }
  l->append(")");
}

void ParamTraits<cc::FilterOperations>::Write(
    Message* m, const param_type& p) {
  WriteParam(m, p.size());
  for (std::size_t i = 0; i < p.size(); ++i) {
    WriteParam(m, p.at(i));
  }
}

bool ParamTraits<cc::FilterOperations>::Read(
    const Message* m, PickleIterator* iter, param_type* r) {
  size_t count;
  if (!ReadParam(m, iter, &count))
    return false;

  for (std::size_t i = 0; i < count; ++i) {
    cc::FilterOperation op = cc::FilterOperation::CreateEmptyFilter();
    if (!ReadParam(m, iter, &op))
      return false;
    r->Append(op);
  }
  return true;
}

void ParamTraits<cc::FilterOperations>::Log(
    const param_type& p, std::string* l) {
  l->append("(");
  for (std::size_t i = 0; i < p.size(); ++i) {
    if (i)
      l->append(", ");
    LogParam(p.at(i), l);
  }
  l->append(")");
}

void ParamTraits<skia::RefPtr<SkImageFilter> >::Write(
    Message* m, const param_type& p) {
  SkImageFilter* filter = p.get();
  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  if (filter && !command_line.HasSwitch(switches::kDisableFiltersOverIPC)) {
    skia::RefPtr<SkData> data =
        skia::AdoptRef(SkValidatingSerializeFlattenable(filter));
    m->WriteData(static_cast<const char*>(data->data()), data->size());
  } else {
    m->WriteData(0, 0);
  }
}

bool ParamTraits<skia::RefPtr<SkImageFilter> >::Read(
    const Message* m, PickleIterator* iter, param_type* r) {
  const char* data = 0;
  int length = 0;
  if (!m->ReadData(iter, &data, &length))
    return false;
  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  if ((length > 0) &&
      !command_line.HasSwitch(switches::kDisableFiltersOverIPC)) {
    SkFlattenable* flattenable = SkValidatingDeserializeFlattenable(
        data, length, SkImageFilter::GetFlattenableType());
    *r = skia::AdoptRef(static_cast<SkImageFilter*>(flattenable));
  } else {
    r->clear();
  }
  return true;
}

void ParamTraits<skia::RefPtr<SkImageFilter> >::Log(
    const param_type& p, std::string* l) {
  l->append("(");
  LogParam(p.get() ? p->countInputs() : 0, l);
  l->append(")");
}

void ParamTraits<gfx::Transform>::Write(
    Message* m, const param_type& p) {
#ifdef SK_MSCALAR_IS_FLOAT
  float column_major_data[16];
  p.matrix().asColMajorf(column_major_data);
#else
  double column_major_data[16];
  p.matrix().asColMajord(column_major_data);
#endif
  m->WriteBytes(&column_major_data, sizeof(SkMScalar) * 16);
}

bool ParamTraits<gfx::Transform>::Read(
    const Message* m, PickleIterator* iter, param_type* r) {
  const char* column_major_data;
  if (!m->ReadBytes(iter, &column_major_data, sizeof(SkMScalar) * 16))
    return false;
  r->matrix().setColMajor(
      reinterpret_cast<const SkMScalar*>(column_major_data));
  return true;
}

void ParamTraits<gfx::Transform>::Log(
    const param_type& p, std::string* l) {
#ifdef SK_MSCALAR_IS_FLOAT
  float row_major_data[16];
  p.matrix().asRowMajorf(row_major_data);
#else
  double row_major_data[16];
  p.matrix().asRowMajord(row_major_data);
#endif
  l->append("(");
  for (int i = 0; i < 16; ++i) {
    if (i > 0)
      l->append(", ");
    LogParam(row_major_data[i], l);
  }
  l->append(") ");
}

void ParamTraits<cc::RenderPass>::Write(
    Message* m, const param_type& p) {
  WriteParam(m, p.id);
  WriteParam(m, p.output_rect);
  WriteParam(m, p.damage_rect);
  WriteParam(m, p.transform_to_root_target);
  WriteParam(m, p.has_transparent_background);
  WriteParam(m, p.shared_quad_state_list.size());
  WriteParam(m, p.quad_list.size());

  size_t shared_quad_state_index = 0;
  size_t last_shared_quad_state_index = kuint32max;
  for (size_t i = 0; i < p.quad_list.size(); ++i) {
    const cc::DrawQuad* quad = p.quad_list[i];
    DCHECK(quad->rect.Contains(quad->visible_rect))
        << quad->material << " rect: " << quad->rect.ToString()
        << " visible_rect: " << quad->visible_rect.ToString();
    DCHECK(quad->opaque_rect.IsEmpty() ||
           quad->rect.Contains(quad->opaque_rect))
        << quad->material << " rect: " << quad->rect.ToString()
        << " opaque_rect: " << quad->opaque_rect.ToString();

    switch (quad->material) {
      case cc::DrawQuad::CHECKERBOARD:
        WriteParam(m, *cc::CheckerboardDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::DEBUG_BORDER:
        WriteParam(m, *cc::DebugBorderDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::IO_SURFACE_CONTENT:
        WriteParam(m, *cc::IOSurfaceDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::PICTURE_CONTENT:
        NOTREACHED();
        break;
      case cc::DrawQuad::TEXTURE_CONTENT:
        WriteParam(m, *cc::TextureDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::RENDER_PASS:
        WriteParam(m, *cc::RenderPassDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::SOLID_COLOR:
        WriteParam(m, *cc::SolidColorDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::SURFACE_CONTENT:
        WriteParam(m, *cc::SurfaceDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::TILED_CONTENT:
        WriteParam(m, *cc::TileDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::STREAM_VIDEO_CONTENT:
        WriteParam(m, *cc::StreamVideoDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::YUV_VIDEO_CONTENT:
        WriteParam(m, *cc::YUVVideoDrawQuad::MaterialCast(quad));
        break;
      case cc::DrawQuad::INVALID:
        break;
    }

    const cc::ScopedPtrVector<cc::SharedQuadState>& sqs_list =
        p.shared_quad_state_list;

    // This is an invalid index.
    size_t bad_index = sqs_list.size();

    // Null shared quad states should not occur.
    DCHECK(quad->shared_quad_state);
    if (!quad->shared_quad_state) {
      WriteParam(m, bad_index);
      continue;
    }

    // SharedQuadStates should appear in the order they are used by DrawQuads.
    // Find the SharedQuadState for this DrawQuad.
    while (shared_quad_state_index < sqs_list.size() &&
           quad->shared_quad_state != sqs_list[shared_quad_state_index])
      ++shared_quad_state_index;

    DCHECK_LT(shared_quad_state_index, sqs_list.size());
    if (shared_quad_state_index >= sqs_list.size()) {
      WriteParam(m, bad_index);
      continue;
    }

    WriteParam(m, shared_quad_state_index);
    if (shared_quad_state_index != last_shared_quad_state_index) {
      WriteParam(m, *sqs_list[shared_quad_state_index]);
      last_shared_quad_state_index = shared_quad_state_index;
    }
  }
}

static size_t ReserveSizeForRenderPassWrite(const cc::RenderPass& p) {
  size_t to_reserve = sizeof(cc::RenderPass);

  to_reserve += p.shared_quad_state_list.size() * sizeof(cc::SharedQuadState);

  // The shared_quad_state_index for each quad.
  to_reserve += p.quad_list.size() * sizeof(size_t);

  // The largest quad type, verified by a unit test.
  to_reserve += p.quad_list.size() * sizeof(cc::RenderPassDrawQuad);
  return to_reserve;
}

template<typename QuadType>
static scoped_ptr<cc::DrawQuad> ReadDrawQuad(const Message* m,
                                             PickleIterator* iter) {
  scoped_ptr<QuadType> quad = QuadType::Create();
  if (!ReadParam(m, iter, quad.get()))
    return scoped_ptr<QuadType>().template PassAs<cc::DrawQuad>();
  return quad.template PassAs<cc::DrawQuad>();
}

bool ParamTraits<cc::RenderPass>::Read(
    const Message* m, PickleIterator* iter, param_type* p) {
  cc::RenderPass::Id id(-1, -1);
  gfx::Rect output_rect;
  gfx::RectF damage_rect;
  gfx::Transform transform_to_root_target;
  bool has_transparent_background;
  size_t shared_quad_state_list_size;
  size_t quad_list_size;

  if (!ReadParam(m, iter, &id) ||
      !ReadParam(m, iter, &output_rect) ||
      !ReadParam(m, iter, &damage_rect) ||
      !ReadParam(m, iter, &transform_to_root_target) ||
      !ReadParam(m, iter, &has_transparent_background) ||
      !ReadParam(m, iter, &shared_quad_state_list_size) ||
      !ReadParam(m, iter, &quad_list_size))
    return false;

  p->SetAll(id,
            output_rect,
            damage_rect,
            transform_to_root_target,
            has_transparent_background);

  size_t last_shared_quad_state_index = kuint32max;
  for (size_t i = 0; i < quad_list_size; ++i) {
    cc::DrawQuad::Material material;
    PickleIterator temp_iter = *iter;
    if (!ReadParam(m, &temp_iter, &material))
      return false;

    scoped_ptr<cc::DrawQuad> draw_quad;
    switch (material) {
      case cc::DrawQuad::CHECKERBOARD:
        draw_quad = ReadDrawQuad<cc::CheckerboardDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::DEBUG_BORDER:
        draw_quad = ReadDrawQuad<cc::DebugBorderDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::IO_SURFACE_CONTENT:
        draw_quad = ReadDrawQuad<cc::IOSurfaceDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::PICTURE_CONTENT:
        NOTREACHED();
        return false;
      case cc::DrawQuad::SURFACE_CONTENT:
        draw_quad = ReadDrawQuad<cc::SurfaceDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::TEXTURE_CONTENT:
        draw_quad = ReadDrawQuad<cc::TextureDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::RENDER_PASS:
        draw_quad = ReadDrawQuad<cc::RenderPassDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::SOLID_COLOR:
        draw_quad = ReadDrawQuad<cc::SolidColorDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::TILED_CONTENT:
        draw_quad = ReadDrawQuad<cc::TileDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::STREAM_VIDEO_CONTENT:
        draw_quad = ReadDrawQuad<cc::StreamVideoDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::YUV_VIDEO_CONTENT:
        draw_quad = ReadDrawQuad<cc::YUVVideoDrawQuad>(m, iter);
        break;
      case cc::DrawQuad::INVALID:
        break;
    }
    if (!draw_quad)
      return false;
    if (!draw_quad->rect.Contains(draw_quad->visible_rect)) {
      LOG(ERROR) << "Quad with invalid visible rect " << draw_quad->material
                 << " rect: " << draw_quad->rect.ToString()
                 << " visible_rect: " << draw_quad->visible_rect.ToString();
      return false;
    }
    if (!draw_quad->opaque_rect.IsEmpty() &&
        !draw_quad->rect.Contains(draw_quad->opaque_rect)) {
      LOG(ERROR) << "Quad with invalid opaque rect " << draw_quad->material
                 << " rect: " << draw_quad->rect.ToString()
                 << " opaque_rect: " << draw_quad->opaque_rect.ToString();
      return false;
    }

    size_t shared_quad_state_index;
    if (!ReadParam(m, iter, &shared_quad_state_index))
      return false;
    if (shared_quad_state_index >= shared_quad_state_list_size)
      return false;
    // SharedQuadState indexes should be in ascending order.
    if (last_shared_quad_state_index != kuint32max &&
        shared_quad_state_index < last_shared_quad_state_index)
      return false;

    // If the quad has a new shared quad state, read it in.
    if (last_shared_quad_state_index != shared_quad_state_index) {
      scoped_ptr<cc::SharedQuadState> state(cc::SharedQuadState::Create());
      if (!ReadParam(m, iter, state.get()))
        return false;
      p->shared_quad_state_list.push_back(state.Pass());
      last_shared_quad_state_index = shared_quad_state_index;
    }

    draw_quad->shared_quad_state = p->shared_quad_state_list.back();
    p->quad_list.push_back(draw_quad.Pass());
  }

  return true;
}

void ParamTraits<cc::RenderPass>::Log(
    const param_type& p, std::string* l) {
  l->append("RenderPass((");
  LogParam(p.id, l);
  l->append("), ");
  LogParam(p.output_rect, l);
  l->append(", ");
  LogParam(p.damage_rect, l);
  l->append(", ");
  LogParam(p.transform_to_root_target, l);
  l->append(", ");
  LogParam(p.has_transparent_background, l);
  l->append(", ");

  l->append("[");
  for (size_t i = 0; i < p.shared_quad_state_list.size(); ++i) {
    if (i)
      l->append(", ");
    LogParam(*p.shared_quad_state_list[i], l);
  }
  l->append("], [");
  for (size_t i = 0; i < p.quad_list.size(); ++i) {
    if (i)
      l->append(", ");
    const cc::DrawQuad* quad = p.quad_list[i];
    switch (quad->material) {
      case cc::DrawQuad::CHECKERBOARD:
        LogParam(*cc::CheckerboardDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::DEBUG_BORDER:
        LogParam(*cc::DebugBorderDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::IO_SURFACE_CONTENT:
        LogParam(*cc::IOSurfaceDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::PICTURE_CONTENT:
        NOTREACHED();
        break;
      case cc::DrawQuad::TEXTURE_CONTENT:
        LogParam(*cc::TextureDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::RENDER_PASS:
        LogParam(*cc::RenderPassDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::SOLID_COLOR:
        LogParam(*cc::SolidColorDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::SURFACE_CONTENT:
        LogParam(*cc::SurfaceDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::TILED_CONTENT:
        LogParam(*cc::TileDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::STREAM_VIDEO_CONTENT:
        LogParam(*cc::StreamVideoDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::YUV_VIDEO_CONTENT:
        LogParam(*cc::YUVVideoDrawQuad::MaterialCast(quad), l);
        break;
      case cc::DrawQuad::INVALID:
        break;
    }
  }
  l->append("])");
}

namespace {
  enum CompositorFrameType {
    NO_FRAME,
    DELEGATED_FRAME,
    GL_FRAME,
    SOFTWARE_FRAME,
  };
}

void ParamTraits<cc::CompositorFrame>::Write(Message* m,
                                             const param_type& p) {
  WriteParam(m, p.metadata);
  if (p.delegated_frame_data) {
    DCHECK(!p.gl_frame_data);
    DCHECK(!p.software_frame_data);
    WriteParam(m, static_cast<int>(DELEGATED_FRAME));
    WriteParam(m, *p.delegated_frame_data);
  } else if (p.gl_frame_data) {
    DCHECK(!p.software_frame_data);
    WriteParam(m, static_cast<int>(GL_FRAME));
    WriteParam(m, *p.gl_frame_data);
  } else if (p.software_frame_data) {
    WriteParam(m, static_cast<int>(SOFTWARE_FRAME));
    WriteParam(m, *p.software_frame_data);
  } else {
    WriteParam(m, static_cast<int>(NO_FRAME));
  }
}

bool ParamTraits<cc::CompositorFrame>::Read(const Message* m,
                                            PickleIterator* iter,
                                            param_type* p) {
  if (!ReadParam(m, iter, &p->metadata))
    return false;

  int compositor_frame_type;
  if (!ReadParam(m, iter, &compositor_frame_type))
    return false;

  switch (compositor_frame_type) {
    case DELEGATED_FRAME:
      p->delegated_frame_data.reset(new cc::DelegatedFrameData());
      if (!ReadParam(m, iter, p->delegated_frame_data.get()))
        return false;
      break;
    case GL_FRAME:
      p->gl_frame_data.reset(new cc::GLFrameData());
      if (!ReadParam(m, iter, p->gl_frame_data.get()))
        return false;
      break;
    case SOFTWARE_FRAME:
      p->software_frame_data.reset(new cc::SoftwareFrameData());
      if (!ReadParam(m, iter, p->software_frame_data.get()))
        return false;
      break;
    case NO_FRAME:
      break;
    default:
      return false;
  }
  return true;
}

void ParamTraits<cc::CompositorFrame>::Log(const param_type& p,
                                           std::string* l) {
  l->append("CompositorFrame(");
  LogParam(p.metadata, l);
  l->append(", ");
  if (p.delegated_frame_data)
    LogParam(*p.delegated_frame_data, l);
  else if (p.gl_frame_data)
    LogParam(*p.gl_frame_data, l);
  else if (p.software_frame_data)
    LogParam(*p.software_frame_data, l);
  l->append(")");
}

void ParamTraits<cc::CompositorFrameAck>::Write(Message* m,
                                                const param_type& p) {
  WriteParam(m, p.resources);
  WriteParam(m, p.last_software_frame_id);
  if (p.gl_frame_data) {
    WriteParam(m, static_cast<int>(GL_FRAME));
    WriteParam(m, *p.gl_frame_data);
  } else {
    WriteParam(m, static_cast<int>(NO_FRAME));
  }
}

bool ParamTraits<cc::CompositorFrameAck>::Read(const Message* m,
                                               PickleIterator* iter,
                                               param_type* p) {
  if (!ReadParam(m, iter, &p->resources))
    return false;

  if (!ReadParam(m, iter, &p->last_software_frame_id))
    return false;

  int compositor_frame_type;
  if (!ReadParam(m, iter, &compositor_frame_type))
    return false;

  switch (compositor_frame_type) {
    case NO_FRAME:
      break;
    case GL_FRAME:
      p->gl_frame_data.reset(new cc::GLFrameData());
      if (!ReadParam(m, iter, p->gl_frame_data.get()))
        return false;
      break;
    default:
      return false;
  }
  return true;
}

void ParamTraits<cc::CompositorFrameAck>::Log(const param_type& p,
                                              std::string* l) {
  l->append("CompositorFrameAck(");
  LogParam(p.resources, l);
  l->append(", ");
  LogParam(p.last_software_frame_id, l);
  l->append(", ");
  if (p.gl_frame_data)
    LogParam(*p.gl_frame_data, l);
  l->append(")");
}

void ParamTraits<cc::DelegatedFrameData>::Write(Message* m,
                                                const param_type& p) {
  DCHECK_NE(0u, p.render_pass_list.size());

  size_t to_reserve = p.resource_list.size() * sizeof(cc::TransferableResource);
  for (size_t i = 0; i < p.render_pass_list.size(); ++i) {
    const cc::RenderPass* pass = p.render_pass_list[i];
    to_reserve += ReserveSizeForRenderPassWrite(*pass);
  }
  m->Reserve(to_reserve);

  WriteParam(m, p.resource_list);
  WriteParam(m, p.render_pass_list.size());
  for (size_t i = 0; i < p.render_pass_list.size(); ++i)
    WriteParam(m, *p.render_pass_list[i]);
}

bool ParamTraits<cc::DelegatedFrameData>::Read(const Message* m,
                                               PickleIterator* iter,
                                               param_type* p) {
  const static size_t kMaxRenderPasses = 10000;

  size_t num_render_passes;
  if (!ReadParam(m, iter, &p->resource_list) ||
      !ReadParam(m, iter, &num_render_passes) ||
      num_render_passes > kMaxRenderPasses || num_render_passes == 0)
    return false;
  for (size_t i = 0; i < num_render_passes; ++i) {
    scoped_ptr<cc::RenderPass> render_pass = cc::RenderPass::Create();
    if (!ReadParam(m, iter, render_pass.get()))
      return false;
    p->render_pass_list.push_back(render_pass.Pass());
  }
  return true;
}

void ParamTraits<cc::DelegatedFrameData>::Log(const param_type& p,
                                              std::string* l) {
  l->append("DelegatedFrameData(");
  LogParam(p.resource_list, l);
  l->append(", [");
  for (size_t i = 0; i < p.render_pass_list.size(); ++i) {
    if (i)
      l->append(", ");
    LogParam(*p.render_pass_list[i], l);
  }
  l->append("])");
}

void ParamTraits<cc::SoftwareFrameData>::Write(Message* m,
                                               const param_type& p) {
  DCHECK(p.CheckedSizeInBytes().IsValid());

  m->Reserve(sizeof(cc::SoftwareFrameData));
  WriteParam(m, p.id);
  WriteParam(m, p.size);
  WriteParam(m, p.damage_rect);
  WriteParam(m, p.handle);
}

bool ParamTraits<cc::SoftwareFrameData>::Read(const Message* m,
                                              PickleIterator* iter,
                                              param_type* p) {
  if (!ReadParam(m, iter, &p->id))
    return false;
  if (!ReadParam(m, iter, &p->size) || !p->CheckedSizeInBytes().IsValid())
    return false;
  if (!ReadParam(m, iter, &p->damage_rect))
    return false;
  if (!ReadParam(m, iter, &p->handle))
    return false;
  return true;
}

void ParamTraits<cc::SoftwareFrameData>::Log(const param_type& p,
                                             std::string* l) {
  l->append("SoftwareFrameData(");
  LogParam(p.id, l);
  l->append(", ");
  LogParam(p.size, l);
  l->append(", ");
  LogParam(p.damage_rect, l);
  l->append(", ");
  LogParam(p.handle, l);
  l->append(")");
}

}  // namespace IPC