/
mapraster.c
1171 lines (1011 loc) · 41.5 KB
/
mapraster.c
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/******************************************************************************
* $id: mapraster.c 10772 2010-11-29 18:27:02Z aboudreault $
*
* Project: MapServer
* Purpose: msDrawRasterLayer(): generic raster layer drawing.
* Author: Frank Warmerdam, warmerdam@pobox.com
* Pete Olson (LMIC)
* Steve Lime
*
******************************************************************************
* Copyright (c) 1996-2010 Regents of the University of Minnesota.
*
* 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 of this Software or works derived from this 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 <assert.h>
#include "mapserver.h"
#include "mapfile.h"
#include "mapresample.h"
#include "mapthread.h"
extern int msyylex_destroy(void);
extern int yyparse(parseObj *);
extern parseResultObj yypresult; /* result of parsing, true/false */
#include "gdal.h"
#include "cpl_string.h"
#include "mapraster.h"
#define MAXCOLORS 256
#define BUFLEN 1024
#define HDRLEN 8
#define CVT(x) ((x) >> 8) /* converts to 8-bit color value */
#define NUMGRAYS 16
/************************************************************************/
/* msGetClass_String() */
/************************************************************************/
static int msGetClass_String(layerObj *layer, colorObj *color,
const char *pixel_value, int firstClassToTry)
{
int i;
const char *tmpstr1 = NULL;
int numitems;
char *item_names[4] = {"pixel", "red", "green", "blue"};
char *item_values[4];
char red_value[8], green_value[8], blue_value[8];
/* -------------------------------------------------------------------- */
/* No need to do a lookup in the case of one default class. */
/* -------------------------------------------------------------------- */
if ((layer->numclasses == 1) &&
!(layer->class[0] -> expression.string)) /* no need to do lookup */
return (0);
/* -------------------------------------------------------------------- */
/* Setup values list for expressions. */
/* -------------------------------------------------------------------- */
numitems = 4;
if (color->red == -1 && color->green == -1 && color->blue == -1) {
strcpy(red_value, "-1");
strcpy(green_value, "-1");
strcpy(blue_value, "-1");
} else {
sprintf(red_value, "%d", color->red);
sprintf(green_value, "%d", color->green);
sprintf(blue_value, "%d", color->blue);
}
item_values[0] = (char *)pixel_value;
item_values[1] = red_value;
item_values[2] = green_value;
item_values[3] = blue_value;
/* -------------------------------------------------------------------- */
/* Loop over classes till we find a match. */
/* -------------------------------------------------------------------- */
if (firstClassToTry >= layer->numclasses)
firstClassToTry = -1;
for (i = 0; i < layer->numclasses; i++) {
const int idx = firstClassToTry < 0 ? i
: i == 0 ? firstClassToTry
: i <= firstClassToTry ? i - 1
: i;
/* check for correct classgroup, if set */
if (layer->class[idx] -> group && layer -> classgroup &&strcasecmp(
layer->class[idx] -> group,
layer -> classgroup) != 0)
continue;
/* Empty expression - always matches */
if (layer->class[idx] -> expression.string == NULL)
return (i);
switch (layer->class[idx] -> expression.type) {
/* -------------------------------------------------------------------- */
/* Simple string match */
/* -------------------------------------------------------------------- */
case (MS_STRING):
/* trim junk white space */
tmpstr1 = pixel_value;
while (*tmpstr1 == ' ')
tmpstr1++;
if (strcmp(layer->class[idx] -> expression.string, tmpstr1) == 0)
return (idx); /* matched */
break;
/* -------------------------------------------------------------------- */
/* Regular expression. Rarely used for raster. */
/* -------------------------------------------------------------------- */
case (MS_REGEX):
if (!layer->class[idx] -> expression.compiled) {
if (ms_regcomp(&(layer->class[idx] -> expression.regex),
layer->class[idx] -> expression.string,
MS_REG_EXTENDED | MS_REG_NOSUB) !=
0) { /* compile the expression */
msSetError(MS_REGEXERR, "Invalid regular expression.",
"msGetClass()");
return (-1);
}
layer->class[idx]->expression.compiled = MS_TRUE;
}
if (ms_regexec(&(layer->class[idx] -> expression.regex), pixel_value, 0,
NULL, 0) == 0)
return (idx); /* got a match */
break;
/* -------------------------------------------------------------------- */
/* Parsed expression. */
/* -------------------------------------------------------------------- */
case (MS_EXPRESSION): {
int status;
parseObj p;
shapeObj dummy_shape;
expressionObj *expression = &(layer->class[idx] -> expression);
dummy_shape.numvalues = numitems;
dummy_shape.values = item_values;
if (expression->tokens == NULL)
msTokenizeExpression(expression, item_names, &numitems);
p.shape = &dummy_shape;
p.expr = expression;
p.expr->curtoken = p.expr->tokens; /* reset */
p.type = MS_PARSE_TYPE_BOOLEAN;
status = yyparse(&p);
if (status != 0) {
msSetError(MS_PARSEERR, "Failed to parse expression: %s",
"msGetClass_FloatRGB", expression->string);
return -1;
}
if (p.result.intval)
return idx;
break;
}
}
}
return (-1); /* not found */
}
/************************************************************************/
/* msGetClass() */
/************************************************************************/
int msGetClass(layerObj *layer, colorObj *color, int colormap_index) {
char pixel_value[12];
snprintf(pixel_value, sizeof(pixel_value), "%d", colormap_index);
return msGetClass_String(layer, color, pixel_value, -1);
}
/************************************************************************/
/* msGetClass_FloatRGB() */
/* */
/* Returns the class based on classification of a floating */
/* pixel value. */
/************************************************************************/
int msGetClass_FloatRGB(layerObj *layer, float fValue, int red, int green,
int blue) {
return msGetClass_FloatRGB_WithFirstClassToTry(layer, fValue, red, green,
blue, -1);
}
int msGetClass_FloatRGB_WithFirstClassToTry(layerObj *layer, float fValue,
int red, int green, int blue,
int firstClassToTry) {
char pixel_value[100];
colorObj color;
color.red = red;
color.green = green;
color.blue = blue;
snprintf(pixel_value, sizeof(pixel_value), "%18g", fValue);
return msGetClass_String(layer, &color, pixel_value, firstClassToTry);
}
/************************************************************************/
/* msRasterSetupTileLayer() */
/* */
/* Setup the tile layer. */
/************************************************************************/
int msDrawRasterSetupTileLayer(mapObj *map, layerObj *layer,
rectObj *psearchrect, int is_query,
int *ptilelayerindex, /* output */
int *ptileitemindex, /* output */
int *ptilesrsindex, /* output */
layerObj **ptlp /* output */) {
int i;
char *requested_fields;
int status;
layerObj *tlp = NULL;
*ptilelayerindex = msGetLayerIndex(layer->map, layer->tileindex);
if (*ptilelayerindex ==
-1) { /* the tileindex references a file, not a layer */
/* so we create a temporary layer */
tlp = (layerObj *)malloc(sizeof(layerObj));
MS_CHECK_ALLOC(tlp, sizeof(layerObj), MS_FAILURE);
initLayer(tlp, map);
*ptlp = tlp;
/* set a few parameters for a very basic shapefile-based layer */
tlp->name = msStrdup("TILE");
tlp->type = MS_LAYER_TILEINDEX;
tlp->data = msStrdup(layer->tileindex);
if (is_query) {
tlp->map = map; /*needed when scaletokens are applied, to extract current
map scale */
for (i = 0; i < layer->numscaletokens; i++) {
if (msGrowLayerScaletokens(tlp) == NULL) {
return MS_FAILURE;
}
initScaleToken(&tlp->scaletokens[i]);
msCopyScaleToken(&layer->scaletokens[i], &tlp->scaletokens[i]);
tlp->numscaletokens++;
}
}
if (layer->projection.numargs > 0 &&
EQUAL(layer->projection.args[0], "auto")) {
tlp->projection.numargs = 1;
tlp->projection.args[0] = msStrdup("auto");
}
if (layer->filteritem)
tlp->filteritem = msStrdup(layer->filteritem);
if (layer->filter.string) {
if (layer->filter.type == MS_EXPRESSION) {
char *pszTmp = (char *)msSmallMalloc(
sizeof(char) * (strlen(layer->filter.string) + 3));
sprintf(pszTmp, "(%s)", layer->filter.string);
msLoadExpressionString(&tlp->filter, pszTmp);
free(pszTmp);
} else if (layer->filter.type == MS_REGEX ||
layer->filter.type == MS_IREGEX) {
char *pszTmp = (char *)msSmallMalloc(
sizeof(char) * (strlen(layer->filter.string) + 3));
sprintf(pszTmp, "/%s/", layer->filter.string);
msLoadExpressionString(&tlp->filter, pszTmp);
free(pszTmp);
} else
msLoadExpressionString(&tlp->filter, layer->filter.string);
tlp->filter.type = layer->filter.type;
}
} else {
if (msCheckParentPointer(layer->map, "map") == MS_FAILURE)
return MS_FAILURE;
tlp = (GET_LAYER(layer->map, *ptilelayerindex));
*ptlp = tlp;
}
status = msLayerOpen(tlp);
if (status != MS_SUCCESS) {
return status;
}
/* fetch tileitem and tilesrs fields */
requested_fields = (char *)msSmallMalloc(
sizeof(char) * (strlen(layer->tileitem) + 1 +
(layer->tilesrs ? strlen(layer->tilesrs) : 0) + 1));
if (layer->tilesrs != NULL)
sprintf(requested_fields, "%s,%s", layer->tileitem, layer->tilesrs);
else
strcpy(requested_fields, layer->tileitem);
status = msLayerWhichItems(tlp, MS_FALSE, requested_fields);
msFree(requested_fields);
if (status != MS_SUCCESS) {
return status;
}
/* get the tileitem and tilesrs index */
for (i = 0; i < tlp->numitems; i++) {
if (strcasecmp(tlp->items[i], layer->tileitem) == 0) {
*ptileitemindex = i;
}
if (layer->tilesrs != NULL &&
strcasecmp(tlp->items[i], layer->tilesrs) == 0) {
*ptilesrsindex = i;
}
}
if (*ptileitemindex < 0) { /* didn't find it */
msSetError(MS_MEMERR, "Could not find attribute %s in tileindex.",
"msDrawRasterLayerLow()", layer->tileitem);
return MS_FAILURE;
}
if (layer->tilesrs != NULL && *ptilesrsindex < 0) { /* didn't find it */
msSetError(MS_MEMERR, "Could not find attribute %s in tileindex.",
"msDrawRasterLayerLow()", layer->tilesrs);
return MS_FAILURE;
}
/* if necessary, project the searchrect to source coords */
if ((map->projection.numargs > 0) && (layer->projection.numargs > 0) &&
!EQUAL(layer->projection.args[0], "auto")) {
if (msProjectRect(&map->projection, &layer->projection, psearchrect) !=
MS_SUCCESS) {
msDebug("msDrawRasterLayerLow(%s): unable to reproject map request "
"rectangle into layer projection, canceling.\n",
layer->name);
return MS_FAILURE;
}
} else if ((map->projection.numargs > 0) && (tlp->projection.numargs > 0) &&
!EQUAL(tlp->projection.args[0], "auto")) {
if (msProjectRect(&map->projection, &tlp->projection, psearchrect) !=
MS_SUCCESS) {
msDebug("msDrawRasterLayerLow(%s): unable to reproject map request "
"rectangle into layer projection, canceling.\n",
layer->name);
return MS_FAILURE;
}
}
return msLayerWhichShapes(tlp, *psearchrect, MS_FALSE);
}
/************************************************************************/
/* msDrawRasterCleanupTileLayer() */
/* */
/* Cleanup the tile layer. */
/************************************************************************/
void msDrawRasterCleanupTileLayer(layerObj *tlp, int tilelayerindex) {
msLayerClose(tlp);
if (tilelayerindex == -1) {
freeLayer(tlp);
free(tlp);
}
}
/************************************************************************/
/* msDrawRasterIterateTileIndex() */
/* */
/* Iterate over the tile layer. */
/************************************************************************/
int msDrawRasterIterateTileIndex(layerObj *layer, layerObj *tlp,
shapeObj *ptshp, /* input-output */
int tileitemindex, int tilesrsindex,
char *tilename, /* output */
size_t sizeof_tilename,
char *tilesrsname, /* output */
size_t sizeof_tilesrsname) {
int status;
status = msLayerNextShape(tlp, ptshp);
if (status == MS_FAILURE || status == MS_DONE) {
return status;
}
if (layer->data == NULL ||
strlen(layer->data) ==
0) { /* assume whole filename is in attribute field */
strlcpy(tilename, ptshp->values[tileitemindex], sizeof_tilename);
} else
snprintf(tilename, sizeof_tilename, "%s/%s", ptshp->values[tileitemindex],
layer->data);
tilesrsname[0] = '\0';
if (tilesrsindex >= 0) {
if (ptshp->values[tilesrsindex] != NULL)
strlcpy(tilesrsname, ptshp->values[tilesrsindex], sizeof_tilesrsname);
}
msFreeShape(ptshp); /* done with the shape */
return status;
}
/************************************************************************/
/* msDrawRasterBuildRasterPath() */
/* */
/* Build the path of the raster to open. */
/************************************************************************/
int msDrawRasterBuildRasterPath(mapObj *map, layerObj *layer,
const char *filename,
char szPath[MS_MAXPATHLEN] /* output */) {
/*
** If using a tileindex then build the path relative to that file if SHAPEPATH
*is not set.
*/
if (layer->tileindex && !map->shapepath) {
char tiAbsFilePath[MS_MAXPATHLEN];
char *tiAbsDirPath = NULL;
msTryBuildPath(tiAbsFilePath, map->mappath,
layer->tileindex); /* absolute path to tileindex file */
tiAbsDirPath = msGetPath(tiAbsFilePath); /* tileindex file's directory */
msBuildPath(szPath, tiAbsDirPath, filename);
free(tiAbsDirPath);
} else {
msTryBuildPath3(szPath, map->mappath, map->shapepath, filename);
}
return MS_SUCCESS;
}
/************************************************************************/
/* msDrawRasterGetCPLErrorMsg() */
/* */
/* Return the CPL error message, and filter out sensitive info. */
/************************************************************************/
const char *msDrawRasterGetCPLErrorMsg(const char *decrypted_path,
const char *szPath) {
const char *cpl_error_msg = CPLGetLastErrorMsg();
/* we wish to avoid reporting decrypted paths */
if (cpl_error_msg != NULL && strstr(cpl_error_msg, decrypted_path) != NULL &&
strcmp(decrypted_path, szPath) != 0)
cpl_error_msg = NULL;
/* we wish to avoid reporting the stock GDALOpen error messages */
if (cpl_error_msg != NULL &&
(strstr(cpl_error_msg, "not recognised as a supported") != NULL ||
strstr(cpl_error_msg, "does not exist") != NULL))
cpl_error_msg = NULL;
if (cpl_error_msg == NULL)
cpl_error_msg = "";
return cpl_error_msg;
}
/************************************************************************/
/* msDrawRasterLoadProjection() */
/* */
/* Handle TILESRS or PROJECTION AUTO for each tile. */
/************************************************************************/
int msDrawRasterLoadProjection(layerObj *layer, GDALDatasetH hDS,
const char *filename, int tilesrsindex,
const char *tilesrsname) {
/*
** Generate the projection information if using TILESRS.
*/
if (tilesrsindex >= 0) {
const char *pszWKT;
if (tilesrsname[0] != '\0')
pszWKT = tilesrsname;
else
pszWKT = GDALGetProjectionRef(hDS);
if (pszWKT != NULL && strlen(pszWKT) > 0) {
if (msOGCWKT2ProjectionObj(pszWKT, &(layer->projection), layer->debug) !=
MS_SUCCESS) {
char szLongMsg[MESSAGELENGTH * 2];
errorObj *ms_error = msGetErrorObj();
snprintf(szLongMsg, sizeof(szLongMsg),
"%s\n"
"PROJECTION '%s' cannot be used for this "
"GDAL raster (`%s').",
ms_error->message, pszWKT, filename);
szLongMsg[MESSAGELENGTH - 1] = '\0';
msSetError(MS_OGRERR, "%s", "msDrawRasterLayer()", szLongMsg);
return MS_FAILURE;
}
}
}
/*
** Generate the projection information if using AUTO.
*/
else if (layer->projection.numargs > 0 &&
EQUAL(layer->projection.args[0], "auto")) {
const char *pszWKT;
pszWKT = GDALGetProjectionRef(hDS);
if (pszWKT != NULL && strlen(pszWKT) > 0) {
if (msOGCWKT2ProjectionObj(pszWKT, &(layer->projection), layer->debug) !=
MS_SUCCESS) {
char szLongMsg[MESSAGELENGTH * 2];
errorObj *ms_error = msGetErrorObj();
snprintf(szLongMsg, sizeof(szLongMsg),
"%s\n"
"PROJECTION AUTO cannot be used for this "
"GDAL raster (`%s').",
ms_error->message, filename);
szLongMsg[MESSAGELENGTH - 1] = '\0';
msSetError(MS_OGRERR, "%s", "msDrawRasterLayer()", szLongMsg);
return MS_FAILURE;
}
}
}
return MS_SUCCESS;
}
typedef enum {
CDRT_OK,
CDRT_RETURN_MS_FAILURE,
CDRT_CONTINUE_NEXT_TILE
} CheckDatasetReturnType;
/************************************************************************/
/* msDrawRasterLayerLowCheckDataset() */
/************************************************************************/
static CheckDatasetReturnType
msDrawRasterLayerLowCheckDataset(mapObj *map, layerObj *layer, GDALDatasetH hDS,
const char *decrypted_path,
const char *szPath) {
/*
** If GDAL doesn't recognise it, and it wasn't successfully opened
** Generate an error.
*/
if (hDS == NULL) {
int ignore_missing = msMapIgnoreMissingData(map);
const char *cpl_error_msg =
msDrawRasterGetCPLErrorMsg(decrypted_path, szPath);
if (ignore_missing == MS_MISSING_DATA_FAIL) {
msSetError(MS_IOERR,
"Corrupt, empty or missing file '%s' for layer '%s'. %s",
"msDrawRasterLayerLow()", szPath, layer->name, cpl_error_msg);
return (CDRT_RETURN_MS_FAILURE);
} else if (ignore_missing == MS_MISSING_DATA_LOG) {
if (layer->debug || layer->map->debug) {
msDebug("Corrupt, empty or missing file '%s' for layer '%s' ... "
"ignoring this missing data. %s\n",
szPath, layer->name, cpl_error_msg);
}
return (CDRT_CONTINUE_NEXT_TILE);
} else if (ignore_missing == MS_MISSING_DATA_IGNORE) {
return (CDRT_CONTINUE_NEXT_TILE);
} else {
/* never get here */
msSetError(MS_IOERR, "msIgnoreMissingData returned unexpected value.",
"msDrawRasterLayerLow()");
return (CDRT_RETURN_MS_FAILURE);
}
}
return CDRT_OK;
}
/************************************************************************/
/* msDrawRasterLayerLowOpenDataset() */
/************************************************************************/
void *msDrawRasterLayerLowOpenDataset(mapObj *map, layerObj *layer,
const char *filename,
char szPath[MS_MAXPATHLEN],
char **p_decrypted_path) {
const char *pszPath;
msGDALInitialize();
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): Filename is: %s\n", layer->name,
filename);
if (strncmp(filename, "<VRTDataset", strlen("<VRTDataset")) == 0) {
pszPath = filename;
} else {
msDrawRasterBuildRasterPath(map, layer, filename, szPath);
pszPath = szPath;
}
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): Path is: %s\n", layer->name, pszPath);
/*
** Note: because we do decryption after the above path expansion
** which depends on actually finding a file, it essentially means that
** fancy path manipulation is essentially disabled when using encrypted
** components. But that is mostly ok, since stuff like sde,postgres and
** oracle georaster do not use real paths.
*/
*p_decrypted_path = msDecryptStringTokens(map, pszPath);
if (*p_decrypted_path == NULL)
return NULL;
msAcquireLock(TLOCK_GDAL);
if (!layer->tileindex) {
char **connectionoptions =
msGetStringListFromHashTable(&(layer->connectionoptions));
char **papszAllowedDrivers = NULL;
// ALLOWED_GDAL_DRIVERS typically set by msDrawWMSLayerLow()
const char *pszAllowedDrivers =
msLayerGetProcessingKey(layer, "ALLOWED_GDAL_DRIVERS");
if (pszAllowedDrivers && !EQUAL(pszAllowedDrivers, "*"))
papszAllowedDrivers = CSLTokenizeString2(pszAllowedDrivers, ",", 0);
GDALDatasetH hDS =
GDALOpenEx(*p_decrypted_path, GDAL_OF_RASTER | GDAL_OF_SHARED,
(const char *const *)papszAllowedDrivers,
(const char *const *)connectionoptions, NULL);
CSLDestroy(papszAllowedDrivers);
CSLDestroy(connectionoptions);
// Give a hint about which GDAL driver should be enabled, but only in
// debug mode.
if (layer->debug && hDS == NULL && pszAllowedDrivers &&
!EQUAL(pszAllowedDrivers, "*")) {
GDALDriverH hDrv = GDALIdentifyDriver(*p_decrypted_path, NULL);
if (hDrv) {
const char *pszDrvName = GDALGetDescription(hDrv);
bool bFound = false;
for (int i = 0; papszAllowedDrivers && papszAllowedDrivers[i]; ++i) {
if (EQUAL(papszAllowedDrivers[i], pszDrvName)) {
bFound = true;
break;
}
}
if (!bFound) {
msSetError(MS_IMGERR,
"Failed to draw layer named '%s'. The image returned "
"is recognized by GDAL driver %s, but it is not allowed "
"currently.",
"msDrawRasterLayerLowOpenDataset()", layer->name,
pszDrvName);
}
}
}
return hDS;
} else {
return GDALOpenShared(*p_decrypted_path, GA_ReadOnly);
}
}
/************************************************************************/
/* msDrawRasterLayerLowCloseDataset() */
/************************************************************************/
void msDrawRasterLayerLowCloseDataset(layerObj *layer, void *hDS) {
if (hDS) {
const char *close_connection;
close_connection = msLayerGetProcessingKey(layer, "CLOSE_CONNECTION");
if (close_connection == NULL && layer->tileindex == NULL)
close_connection = "DEFER";
{
/* Due to how GDAL processes OVERVIEW_LEVEL, datasets returned are */
/* not shared, despite being asked to, so close them for real */
char **connectionoptions =
msGetStringListFromHashTable(&(layer->connectionoptions));
if (CSLFetchNameValue(connectionoptions, "OVERVIEW_LEVEL"))
close_connection = NULL;
CSLDestroy(connectionoptions);
}
if (close_connection != NULL &&
strcasecmp(close_connection, "DEFER") == 0) {
GDALDereferenceDataset((GDALDatasetH)hDS);
} else {
GDALClose((GDALDatasetH)hDS);
}
msReleaseLock(TLOCK_GDAL);
}
}
/************************************************************************/
/* msDrawRasterLayerLowCheckIfMustDraw() */
/* */
/* Return 1 if the layer should be drawn. */
/************************************************************************/
int msDrawRasterLayerLowCheckIfMustDraw(mapObj *map, layerObj *layer) {
if (!layer->data && !layer->tileindex &&
!(layer->connectiontype == MS_KERNELDENSITY ||
layer->connectiontype == MS_IDW)) {
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): layer data and tileindex NULL ... "
"doing nothing.",
layer->name);
return (0);
}
if ((layer->status != MS_ON) && (layer->status != MS_DEFAULT)) {
if (layer->debug)
msDebug(
"msDrawRasterLayerLow(%s): not status ON or DEFAULT, doing nothing.",
layer->name);
return (0);
}
if (map->scaledenom > 0) {
if ((layer->maxscaledenom > 0) &&
(map->scaledenom > layer->maxscaledenom)) {
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): skipping, map scale %.2g > "
"MAXSCALEDENOM=%g\n",
layer->name, map->scaledenom, layer->maxscaledenom);
return (0);
}
if ((layer->minscaledenom > 0) &&
(map->scaledenom <= layer->minscaledenom)) {
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): skipping, map scale %.2g < "
"MINSCALEDENOM=%g\n",
layer->name, map->scaledenom, layer->minscaledenom);
return (0);
}
}
if (layer->maxscaledenom <= 0 && layer->minscaledenom <= 0) {
if ((layer->maxgeowidth > 0) &&
((map->extent.maxx - map->extent.minx) > layer->maxgeowidth)) {
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): skipping, map width %.2g > "
"MAXSCALEDENOM=%g\n",
layer->name, (map->extent.maxx - map->extent.minx),
layer->maxgeowidth);
return (0);
}
if ((layer->mingeowidth > 0) &&
((map->extent.maxx - map->extent.minx) < layer->mingeowidth)) {
if (layer->debug)
msDebug("msDrawRasterLayerLow(%s): skipping, map width %.2g < "
"MINSCALEDENOM=%g\n",
layer->name, (map->extent.maxx - map->extent.minx),
layer->mingeowidth);
return (0);
}
}
return 1;
}
/************************************************************************/
/* msDrawRasterLayerLow() */
/* */
/* Check for various file types and act appropriately. Handle */
/* tile indexing. */
/************************************************************************/
int msDrawRasterLayerLow(mapObj *map, layerObj *layer, imageObj *image,
rasterBufferObj *rb) {
return msDrawRasterLayerLowWithDataset(map, layer, image, rb, NULL);
}
int msDrawRasterLayerLowWithDataset(mapObj *map, layerObj *layer,
imageObj *image, rasterBufferObj *rb,
void *hDatasetIn) {
/* -------------------------------------------------------------------- */
/* As of MapServer 6.0 GDAL is required for rendering raster */
/* imagery. */
/* -------------------------------------------------------------------- */
int status, done;
char *filename = NULL, tilename[MS_MAXPATHLEN], tilesrsname[1024];
layerObj *tlp = NULL; /* pointer to the tile layer either real or temporary */
int tileitemindex = -1, tilelayerindex = -1, tilesrsindex = -1;
shapeObj tshp;
char szPath[MS_MAXPATHLEN] = {0};
char *decrypted_path = NULL;
int final_status = MS_SUCCESS;
rectObj searchrect;
GDALDatasetH hDS;
double adfGeoTransform[6];
void *kernel_density_cleanup_ptr = NULL;
if (layer->debug > 0 || map->debug > 1)
msDebug("msDrawRasterLayerLow(%s): entering.\n", layer->name);
if (hDatasetIn == NULL && !msDrawRasterLayerLowCheckIfMustDraw(map, layer)) {
return MS_SUCCESS;
}
msGDALInitialize();
if (layer->tileindex) { /* we have an index file */
msInitShape(&tshp);
searchrect = map->extent;
status = msDrawRasterSetupTileLayer(map, layer, &searchrect, MS_FALSE,
&tilelayerindex, &tileitemindex,
&tilesrsindex, &tlp);
if (status != MS_SUCCESS) {
if (status != MS_DONE)
final_status = status;
goto cleanup;
}
}
done = MS_FALSE;
while (done != MS_TRUE) {
if (layer->tileindex) {
status = msDrawRasterIterateTileIndex(
layer, tlp, &tshp, tileitemindex, tilesrsindex, tilename,
sizeof(tilename), tilesrsname, sizeof(tilesrsname));
if (status == MS_FAILURE) {
final_status = MS_FAILURE;
break;
}
if (status == MS_DONE)
break; /* no more tiles/images */
filename = tilename;
} else {
filename = layer->data;
done = MS_TRUE; /* only one image so we're done after this */
}
if (layer->connectiontype == MS_KERNELDENSITY ||
layer->connectiontype == MS_IDW) {
msAcquireLock(TLOCK_GDAL);
status = msInterpolationDataset(map, image, layer, &hDS,
&kernel_density_cleanup_ptr);
if (status != MS_SUCCESS) {
msReleaseLock(TLOCK_GDAL);
final_status = status;
goto cleanup;
}
done = MS_TRUE;
if (msProjectionsDiffer(&map->projection, &layer->projection)) {
char *mapProjStr = msGetProjectionString(&(map->projection));
/* Set the projection to the map file projection */
if (msLoadProjectionString(&(layer->projection), mapProjStr) != 0) {
GDALClose(hDS);
msReleaseLock(TLOCK_GDAL);
msSetError(MS_CGIERR,
"Unable to set projection on interpolation layer.",
"msDrawRasterLayerLow()");
return (MS_FAILURE);
}
free(mapProjStr);
}
} else {
if (strlen(filename) == 0)
continue;
if (hDatasetIn) {
hDS = (GDALDatasetH)hDatasetIn;
} else {
hDS = (GDALDatasetH)msDrawRasterLayerLowOpenDataset(
map, layer, filename, szPath, &decrypted_path);
}
}
if (hDatasetIn == NULL) {
CheckDatasetReturnType eRet = msDrawRasterLayerLowCheckDataset(
map, layer, hDS, decrypted_path, szPath);
msFree(decrypted_path);
decrypted_path = NULL;
if (eRet == CDRT_CONTINUE_NEXT_TILE) {
msReleaseLock(TLOCK_GDAL);
continue;
}
if (eRet == CDRT_RETURN_MS_FAILURE) {
msReleaseLock(TLOCK_GDAL);
return MS_FAILURE;
}
}
if (msDrawRasterLoadProjection(layer, hDS, filename, tilesrsindex,
tilesrsname) != MS_SUCCESS) {
if (hDatasetIn == NULL) {
GDALClose(hDS);
msReleaseLock(TLOCK_GDAL);
}
final_status = MS_FAILURE;
break;
}
msGetGDALGeoTransform(hDS, map, layer, adfGeoTransform);
/*
** We want to resample if the source image is rotated, if
** the projections differ or if resampling has been explicitly
** requested, or if the image has north-down instead of north-up.
*/
if (((adfGeoTransform[2] != 0.0 || adfGeoTransform[4] != 0.0 ||
adfGeoTransform[5] > 0.0 || adfGeoTransform[1] < 0.0) &&
layer->transform) ||
msProjectionsDiffer(&(map->projection), &(layer->projection)) ||
CSLFetchNameValue(layer->processing, "RESAMPLE") != NULL) {
status = msResampleGDALToMap(map, layer, image, rb, hDS);
} else {
if (adfGeoTransform[2] != 0.0 || adfGeoTransform[4] != 0.0) {
if (layer->debug || map->debug)
msDebug("Layer %s has rotational coefficients but we\n"
"are unable to use them, projections support\n"
"needs to be built in.",
layer->name);
}
status = msDrawRasterLayerGDAL(map, layer, image, rb, hDS);
}
if (status == -1) {
if (hDatasetIn == NULL) {
GDALClose(hDS);
msReleaseLock(TLOCK_GDAL);
}
final_status = MS_FAILURE;
break;
}
/*
** Should we keep this file open for future use?
** default to keeping open for single data files, and
** to closing for tile indexes
*/
if (layer->connectiontype == MS_KERNELDENSITY ||
layer->connectiontype == MS_IDW) {
/*
** Fix issue #5330
** The in-memory kernel density heatmap gdal dataset handle (hDS) gets
*re-used
** but the associated rasterband cache doesn't get flushed, which causes
*old data
** to be rendered instead of the newly generated imagery. To fix, simply
*close the
** the handle and prevent further re-use.
** Note that instead of this workaround, we could explicitely set
** CLOSE_CONNECTION=ALWAYS on the kerneldensity layer.
*/
GDALClose(hDS);
msReleaseLock(TLOCK_GDAL);
} else {
if (hDatasetIn == NULL)
msDrawRasterLayerLowCloseDataset(layer, hDS);
}
} /* next tile */
cleanup:
if (layer->tileindex) { /* tiling clean-up */
msDrawRasterCleanupTileLayer(tlp, tilelayerindex);
}
if (kernel_density_cleanup_ptr) {
msCleanupInterpolationDataset(map, image, layer,
kernel_density_cleanup_ptr);
}
return final_status;
}
/************************************************************************/