本文整理汇总了C++中GDALColorTable::CreateColorRamp方法的典型用法代码示例。如果您正苦于以下问题：C++ GDALColorTable::CreateColorRamp方法的具体用法？C++ GDALColorTable::CreateColorRamp怎么用？C++ GDALColorTable::CreateColorRamp使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GDALColorTable的用法示例。
在下文中一共展示了GDALColorTable::CreateColorRamp方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Init_ILImage
//.........这里部分代码省略.........
//
if ((image.pagesize.c==1)&&(node=CPLGetXMLNode(defimage,"Palette"))) {
int entries=static_cast<int>(getXMLNum(node,"Size",255));
GDALPaletteInterp eInterp=GPI_RGB;
// A flag to convert from HLS to HSV
bool is_hsv=false;
CPLString pModel=CPLGetXMLValue(node,"Model","RGB");
if (!pModel.empty()) {
if (pModel.find("HSV")!=string::npos) {
eInterp=GPI_HLS;
is_hsv=true;
} else if (pModel.find("HLS")!=string::npos)
eInterp=GPI_HLS;
else if (pModel.find("CMYK")!=string::npos) eInterp=GPI_CMYK;
// Can it do LuminanceAlpha?
else if (pModel.find("L")!=string::npos) eInterp=GPI_Gray;
// RGBA and RGB are the same
else if (pModel.find("RGB")!=string::npos) eInterp=GPI_RGB;
else {
CPLError(CE_Failure, CPLE_AppDefined,
"GDAL MRF: Palette Model %s is unknown, use RGB,RGBA,HSV,HLS,CMYK or L",
pModel.c_str());
return CE_Failure;
}
}
if ((entries>0)&&(entries<257)) {
int start_idx, end_idx;
GDALColorEntry ce_start={0,0,0,255},ce_end={0,0,0,255};
// Create it and initialize it to nothing
GDALColorTable *poColorTable = new GDALColorTable(eInterp);
poColorTable->CreateColorRamp(0,&ce_start,entries-1,&ce_end);
// Read the values
CPLXMLNode *p=CPLGetXMLNode(node,"Entry");
if (p) {
// Initialize the first entry, just in case
ce_start=GetXMLColorEntry(p);
if (is_hsv) ce_start=HSVSwap(ce_start);
start_idx=static_cast<int>(getXMLNum(p,"idx",0));
if (start_idx<0) {
CPLError(CE_Failure, CPLE_AppDefined,
"GDAL MRF: Palette index %d not allowed",start_idx);
delete poColorTable;
return CE_Failure;
}
poColorTable->SetColorEntry(start_idx,&ce_start);
while (NULL!=(p=SearchXMLSiblings(p,"Entry"))) {
// For every entry, create a ramp
ce_end=GetXMLColorEntry(p);
if (is_hsv) ce_end=HSVSwap(ce_end);
end_idx=static_cast<int>(getXMLNum(p,"idx",start_idx+1));
if ((end_idx<=start_idx)||(start_idx>=entries)) {
CPLError(CE_Failure, CPLE_AppDefined,
"GDAL MRF: Index Error at index %d",end_idx);
delete poColorTable;
return CE_Failure;
}
poColorTable->CreateColorRamp(start_idx,&ce_start,
end_idx,&ce_end);
ce_start=ce_end;
start_idx=end_idx;
}
}