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/******************************************************************************
*
* Project: WMS Client Driver
* Purpose: Implementation of Dataset and RasterBand classes for WMS
* and other similar services.
* Author: Even Rouault
*
******************************************************************************
* Copyright (c) 2011, Even Rouault <even dot rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "wmsdriver.h"
#include "minidriver_virtualearth.h"
#include <algorithm>
// These should be global, they are used all over the place
const double SPHERICAL_RADIUS = 6378137.0;
const double MAX_GM = SPHERICAL_RADIUS * M_PI; // 20037508.342789244
WMSMiniDriver_VirtualEarth::WMSMiniDriver_VirtualEarth()
{
}
WMSMiniDriver_VirtualEarth::~WMSMiniDriver_VirtualEarth()
{
}
CPLErr
WMSMiniDriver_VirtualEarth::Initialize(CPLXMLNode *config,
CPL_UNUSED char **papszOpenOptions)
{
m_base_url = CPLGetXMLValue(config, "ServerURL", "");
if (m_base_url.empty())
{
CPLError(CE_Failure, CPLE_AppDefined,
"GDALWMS, VirtualEarth mini-driver: ServerURL missing.");
return CE_Failure;
}
if (m_base_url.find("${quadkey}") == std::string::npos)
{
CPLError(CE_Failure, CPLE_AppDefined,
"GDALWMS, VirtualEarth mini-driver: ${quadkey} missing in "
"ServerURL.");
return CE_Failure;
}
m_parent_dataset->WMSSetDefaultBlockSize(256, 256);
m_parent_dataset->WMSSetDefaultDataWindowCoordinates(-MAX_GM, MAX_GM,
MAX_GM, -MAX_GM);
m_parent_dataset->WMSSetDefaultTileLevel(21);
m_parent_dataset->WMSSetDefaultOverviewCount(20);
m_parent_dataset->WMSSetNeedsDataWindow(FALSE);
m_oSRS.importFromEPSG(3857);
return CE_None;
}
CPLErr WMSMiniDriver_VirtualEarth::TiledImageRequest(
WMSHTTPRequest &request, CPL_UNUSED const GDALWMSImageRequestInfo &iri,
const GDALWMSTiledImageRequestInfo &tiri)
{
CPLString &url = request.URL;
url = m_base_url;
char szTileNumber[64];
int x = tiri.m_x;
int y = tiri.m_y;
int z = std::min(32, tiri.m_level);
for (int i = 0; i < z; i++)
{
int row = (y & 1);
int col = (x & 1);
szTileNumber[z - 1 - i] = (char)('0' + (col | (row << 1)));
x = x >> 1;
y = y >> 1;
}
szTileNumber[z] = 0;
URLSearchAndReplace(&url, "${quadkey}", "%s", szTileNumber);
// Sounds like this should be random
URLSearchAndReplace(&url, "${server_num}", "%d",
(tiri.m_x + tiri.m_y + z) % 4);
return CE_None;
}
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