Move chromeos specific utility functions for display to chromeos/display

ui/base/x/x11_util.cc

 // 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.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "ui/base/x/x11_util.h"
 
@@ skipping 299 matching lines @@
   }
 
   ~XButtonMap() {}
 
   unsigned char map_[256];
   int count_;
 
   DISALLOW_COPY_AND_ASSIGN(XButtonMap);
 };
 
-bool IsRandRAvailable() {
-  int randr_version_major = 0;
-  int randr_version_minor = 0;
-  static bool is_randr_available = XRRQueryVersion(
-      GetXDisplay(), &randr_version_major, &randr_version_minor);
-  return is_randr_available;
-}
-
 bool IsShapeAvailable() {
   int dummy;
   static bool is_shape_available =
     XShapeQueryExtension(ui::GetXDisplay(), &dummy, &dummy);
   return is_shape_available;
 
 }
 
-// Get the EDID data from the |output| and stores to |prop|. |nitem| will store
-// the number of characters |prop| will have. It doesn't take the ownership of
-// |prop|, so caller must release it by XFree().
-// Returns true if EDID property is successfully obtained. Otherwise returns
-// false and does not touch |prop| and |nitems|.
-bool GetEDIDProperty(XID output, unsigned long* nitems, unsigned char** prop) {
-  if (!IsRandRAvailable())
-    return false;
-
-  static Atom edid_property = GetAtom(RR_PROPERTY_RANDR_EDID);
-
-  Display* display = GetXDisplay();
-
-  bool has_edid_property = false;
-  int num_properties = 0;
-  Atom* properties = XRRListOutputProperties(display, output, &num_properties);
-  for (int i = 0; i < num_properties; ++i) {
-    if (properties[i] == edid_property) {
-      has_edid_property = true;
-      break;
-    }
-  }
-  XFree(properties);
-  if (!has_edid_property)
-    return false;
-
-  Atom actual_type;
-  int actual_format;
-  unsigned long bytes_after;
-  XRRGetOutputProperty(display,
-                       output,
-                       edid_property,
-                       0,                // offset
-                       128,              // length
-                       false,            // _delete
-                       false,            // pending
-                       AnyPropertyType,  // req_type
-                       &actual_type,
-                       &actual_format,
-                       nitems,
-                       &bytes_after,
-                       prop);
-  DCHECK_EQ(XA_INTEGER, actual_type);
-  DCHECK_EQ(8, actual_format);
-  return true;
-}
-
 }  // namespace
 
 bool XDisplayExists() {
   return (GetXDisplay() != NULL);
 }
 
 Display* GetXDisplay() {
   return base::MessagePumpForUI::GetDefaultXDisplay();
 }
 
@@ skipping 897 matching lines @@
 }
 
 void FreePicture(Display* display, XID picture) {
   XRenderFreePicture(display, picture);
 }
 
 void FreePixmap(Display* display, XID pixmap) {
   XFreePixmap(display, pixmap);
 }
 
-bool GetOutputDeviceData(XID output,
-                         uint16* manufacturer_id,
-                         uint16* product_code,
-                         std::string* human_readable_name) {
-  unsigned long nitems = 0;
-  unsigned char *prop = NULL;
-  if (!GetEDIDProperty(output, &nitems, &prop))
-    return false;
-
-  bool result = ParseOutputDeviceData(
-      prop, nitems, manufacturer_id, product_code, human_readable_name);
-  XFree(prop);
-  return result;
-}
-
-bool ParseOutputDeviceData(const unsigned char* prop,
-                           unsigned long nitems,
-                           uint16* manufacturer_id,
-                           uint16* product_code,
-                           std::string* human_readable_name) {
-  // See http://en.wikipedia.org/wiki/Extended_display_identification_data
-  // for the details of EDID data format.  We use the following data:
-  //   bytes 8-9: manufacturer EISA ID, in big-endian
-  //   bytes 10-11: represents product code, in little-endian
-  //   bytes 54-125: four descriptors (18-bytes each) which may contain
-  //     the display name.
-  const unsigned int kManufacturerOffset = 8;
-  const unsigned int kManufacturerLength = 2;
-  const unsigned int kProductCodeOffset = 10;
-  const unsigned int kProductCodeLength = 2;
-  const unsigned int kDescriptorOffset = 54;
-  const unsigned int kNumDescriptors = 4;
-  const unsigned int kDescriptorLength = 18;
-  // The specifier types.
-  const unsigned char kMonitorNameDescriptor = 0xfc;
-
-  if (manufacturer_id) {
-    if (nitems < kManufacturerOffset + kManufacturerLength)
-      return false;
-
-    *manufacturer_id =
-        *reinterpret_cast<const uint16*>(prop + kManufacturerOffset);
-#if defined(ARCH_CPU_LITTLE_ENDIAN)
-    *manufacturer_id = base::ByteSwap(*manufacturer_id);
-#endif
-  }
-
-  if (product_code) {
-    if (nitems < kProductCodeOffset + kProductCodeLength)
-      return false;
-
-    *product_code = base::ByteSwapToLE16(
-        *reinterpret_cast<const uint16*>(prop + kProductCodeOffset));
-  }
-
-  if (!human_readable_name)
-    return true;
-
-  human_readable_name->clear();
-  for (unsigned int i = 0; i < kNumDescriptors; ++i) {
-    if (nitems < kDescriptorOffset + (i + 1) * kDescriptorLength)
-      break;
-
-    const unsigned char* desc_buf =
-        prop + kDescriptorOffset + i * kDescriptorLength;
-    // If the descriptor contains the display name, it has the following
-    // structure:
-    //   bytes 0-2, 4: \0
-    //   byte 3: descriptor type, defined above.
-    //   bytes 5-17: text data, ending with \r, padding with spaces
-    // we should check bytes 0-2 and 4, since it may have other values in
-    // case that the descriptor contains other type of data.
-    if (desc_buf[0] == 0 && desc_buf[1] == 0 && desc_buf[2] == 0 &&
-        desc_buf[4] == 0) {
-      if (desc_buf[3] == kMonitorNameDescriptor) {
-        std::string found_name(
-            reinterpret_cast<const char*>(desc_buf + 5), kDescriptorLength - 5);
-        TrimWhitespaceASCII(found_name, TRIM_TRAILING, human_readable_name);
-        break;
-      }
-    }
-  }
-
-  if (human_readable_name->empty())
-    return false;
-
-  // Verify if the |human_readable_name| consists of printable characters only.
-  for (size_t i = 0; i < human_readable_name->size(); ++i) {
-    char c = (*human_readable_name)[i];
-    if (!isascii(c) || !isprint(c)) {
-      human_readable_name->clear();
-      return false;
-    }
-  }
-
-  return true;
-}
-
-bool GetOutputOverscanFlag(XID output, bool* flag) {
-  unsigned long nitems = 0;
-  unsigned char *prop = NULL;
-  if (!GetEDIDProperty(output, &nitems, &prop))
-    return false;
-
-  bool found = ParseOutputOverscanFlag(prop, nitems, flag);
-  XFree(prop);
-  return found;
-}
-
-bool ParseOutputOverscanFlag(const unsigned char* prop,
-                             unsigned long nitems,
-                             bool *flag) {
-  // See http://en.wikipedia.org/wiki/Extended_display_identification_data
-  // for the extension format of EDID.  Also see EIA/CEA-861 spec for
-  // the format of the extensions and how video capability is encoded.
-  //  - byte 0: tag.  should be 02h.
-  //  - byte 1: revision.  only cares revision 3 (03h).
-  //  - byte 4-: data block.
-  const unsigned int kExtensionBase = 128;
-  const unsigned int kExtensionSize = 128;
-  const unsigned int kNumExtensionsOffset = 126;
-  const unsigned int kDataBlockOffset = 4;
-  const unsigned char kCEAExtensionTag = '\x02';
-  const unsigned char kExpectedExtensionRevision = '\x03';
-  const unsigned char kExtendedTag = 7;
-  const unsigned char kExtendedVideoCapabilityTag = 0;
-  const unsigned int kPTOverscan = 4;
-  const unsigned int kITOverscan = 2;
-  const unsigned int kCEOverscan = 0;
-
-  if (nitems <= kNumExtensionsOffset)
-    return false;
-
-  unsigned char num_extensions = prop[kNumExtensionsOffset];
-
-  for (size_t i = 0; i < num_extensions; ++i) {
-    // Skip parsing the whole extension if size is not enough.
-    if (nitems < kExtensionBase + (i + 1) * kExtensionSize)
-      break;
-
-    const unsigned char* extension = prop + kExtensionBase + i * kExtensionSize;
-    unsigned char tag = extension[0];
-    unsigned char revision = extension[1];
-    if (tag != kCEAExtensionTag || revision != kExpectedExtensionRevision)
-      continue;
-
-    unsigned char timing_descriptors_start =
-        std::min(extension[2], static_cast<unsigned char>(kExtensionSize));
-    const unsigned char* data_block = extension + kDataBlockOffset;
-    while (data_block < extension + timing_descriptors_start) {
-      // A data block is encoded as:
-      // - byte 1 high 3 bits: tag. '07' for extended tags.
-      // - byte 1 remaining bits: the length of data block.
-      // - byte 2: the extended tag.  '0' for video capability.
-      // - byte 3: the capability.
-      unsigned char tag = data_block[0] >> 5;
-      unsigned char payload_length = data_block[0] & 0x1f;
-      if (static_cast<unsigned long>(data_block + payload_length - prop) >
-          nitems)
-        break;
-
-      if (tag != kExtendedTag || payload_length < 2) {
-        data_block += payload_length + 1;
-        continue;
-      }
-
-      unsigned char extended_tag_code = data_block[1];
-      if (extended_tag_code != kExtendedVideoCapabilityTag) {
-        data_block += payload_length + 1;
-        continue;
-      }
-
-      // The difference between preferred, IT, and CE video formats
-      // doesn't matter. Sets |flag| to true if any of these flags are true.
-      if ((data_block[2] & (1 << kPTOverscan)) ||
-          (data_block[2] & (1 << kITOverscan)) ||
-          (data_block[2] & (1 << kCEOverscan))) {
-        *flag = true;
-      } else {
-        *flag = false;
-      }
-      return true;
-    }
-  }
-
-  return false;
-}
-
 bool GetWindowManagerName(std::string* wm_name) {
   DCHECK(wm_name);
   int wm_window = 0;
   if (!GetIntProperty(GetX11RootWindow(),
                       "_NET_SUPPORTING_WM_CHECK",
                       &wm_window)) {
     return false;
   }
 
   // It's possible that a window manager started earlier in this X session left
@@ skipping 313 matching lines @@
       << "request_code " << static_cast<int>(error_event.request_code) << ", "
       << "minor_code " << static_cast<int>(error_event.minor_code)
       << " (" << request_str << ")";
 }
 
 // ----------------------------------------------------------------------------
 // End of x11_util_internal.h
 
 
 }  // namespace ui