1                 : /******************************************************************************
       2                 :  * $Id: minidriver_tms.cpp 22021 2011-03-23 21:51:19Z rouault $
       3                 :  *
       4                 :  * Project:  WMS Client Driver
       5                 :  * Purpose:  Implementation of Dataset and RasterBand classes for WMS
       6                 :  *           and other similar services.
       7                 :  * Author:   Chris Schmidt
       8                 :  *
       9                 :  ******************************************************************************
      10                 :  * Copyright (c) 2007, Chris Schmidt
      11                 :  *
      12                 :  * Permission is hereby granted, free of charge, to any person obtaining a
      13                 :  * copy of this software and associated documentation files (the "Software"),
      14                 :  * to deal in the Software without restriction, including without limitation
      15                 :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      16                 :  * and/or sell copies of the Software, and to permit persons to whom the
      17                 :  * Software is furnished to do so, subject to the following conditions:
      18                 :  *
      19                 :  * The above copyright notice and this permission notice shall be included
      20                 :  * in all copies or substantial portions of the Software.
      21                 :  *
      22                 :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      23                 :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      24                 :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      25                 :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      26                 :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      27                 :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      28                 :  * DEALINGS IN THE SOFTWARE.
      29                 :  ****************************************************************************/
      30                 : 
      31                 : #include "stdinc.h"
      32                 : 
      33            1061 : CPP_GDALWMSMiniDriverFactory(TMS)
      34                 : 
      35               2 : GDALWMSMiniDriver_TMS::GDALWMSMiniDriver_TMS() {
      36               2 : }
      37                 : 
      38               2 : GDALWMSMiniDriver_TMS::~GDALWMSMiniDriver_TMS() {
      39               2 : }
      40                 : 
      41               2 : CPLErr GDALWMSMiniDriver_TMS::Initialize(CPLXMLNode *config) {
      42               2 :     CPLErr ret = CE_None;
      43                 : 
      44               2 :     if (ret == CE_None) {
      45               2 :         const char *base_url = CPLGetXMLValue(config, "ServerURL", "");
      46               2 :         if (base_url[0] != '\0') {
      47               2 :             m_base_url = base_url;
      48               2 :             if (m_base_url.find("${") == std::string::npos) {
      49               0 :                 if (m_base_url[m_base_url.size()-1] != '/') {
      50               0 :                     m_base_url += "/";
      51                 :                 }
      52               0 :                 m_base_url += "${version}/${layer}/${z}/${x}/${y}.${format}";
      53                 :             }
      54                 :         } else {
      55               0 :             CPLError(CE_Failure, CPLE_AppDefined, "GDALWMS, TMS mini-driver: ServerURL missing.");
      56               0 :             ret = CE_Failure;
      57                 :         }
      58                 :     }
      59                 : 
      60               2 :     m_dataset  = CPLGetXMLValue(config, "Layer", "");
      61               4 :     m_version  = CPLGetXMLValue(config, "Version", "1.0.0");
      62               4 :     m_format   = CPLGetXMLValue(config, "Format", "jpg");
      63                 : 
      64               2 :     return ret;
      65                 : }
      66                 : 
      67               2 : void GDALWMSMiniDriver_TMS::GetCapabilities(GDALWMSMiniDriverCapabilities *caps) {
      68               2 :     caps->m_capabilities_version = 1;
      69               2 :     caps->m_has_arb_overviews = 0;
      70               2 :     caps->m_has_image_request = 0;
      71               2 :     caps->m_has_tiled_image_requeset = 1;
      72               2 :     caps->m_max_overview_count = 32;
      73               2 : }
      74                 : 
      75               0 : void GDALWMSMiniDriver_TMS::ImageRequest(CPLString *url, const GDALWMSImageRequestInfo &iri) {
      76               0 : }
      77                 : 
      78               0 : void GDALWMSMiniDriver_TMS::TiledImageRequest(CPLString *url, const GDALWMSImageRequestInfo &iri, const GDALWMSTiledImageRequestInfo &tiri) {
      79               0 :     const GDALWMSDataWindow *data_window = m_parent_dataset->WMSGetDataWindow();
      80                 :     int tms_y;
      81                 : 
      82               0 :     if (data_window->m_y_origin != GDALWMSDataWindow::TOP) {
      83                 :         tms_y = static_cast<int>(floor(((data_window->m_y1 - data_window->m_y0)
      84               0 :                                       / (iri.m_y1 - iri.m_y0)) + 0.5)) - tiri.m_y - 1;
      85                 :     } else {
      86               0 :         tms_y = tiri.m_y;
      87                 :     }
      88                 :     // http://tms25.arc.nasa.gov/tile/tile.aspx?T=geocover2000&L=0&X=86&Y=39
      89               0 :     *url = m_base_url;
      90                 : 
      91               0 :     URLSearchAndReplace(url, "${version}", "%s", m_version.c_str());
      92               0 :     URLSearchAndReplace(url, "${layer}", "%s", m_dataset.c_str());
      93               0 :     URLSearchAndReplace(url, "${format}", "%s", m_format.c_str());
      94               0 :     URLSearchAndReplace(url, "${x}", "%d", tiri.m_x);
      95               0 :     URLSearchAndReplace(url, "${y}", "%d", tms_y);
      96               0 :     URLSearchAndReplace(url, "${z}", "%d", tiri.m_level);
      97                 : 
      98                 :     /* Hack for some TMS like servers that require tile numbers split into 3 groups of */
      99                 :     /* 3 digits, like http://tile8.geo.admin.ch/geoadmin/ch.swisstopo.pixelkarte-farbe */
     100               0 :     URLSearchAndReplace(url, "${xxx}", "%03d/%03d/%03d", tiri.m_x / 1000000, (tiri.m_x / 1000) % 1000, tiri.m_x % 1000);
     101               0 :     URLSearchAndReplace(url, "${yyy}", "%03d/%03d/%03d", tms_y / 1000000, (tms_y / 1000) % 1000, tms_y % 1000);
     102                 : 
     103               0 : }