NDPluginOverlay.h

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#ifndef NDPluginOverlay_H
#define NDPluginOverlay_H

#include <vector>
#include <algorithm>
#include "NDPluginDriver.h"

typedef enum {
    NDOverlayCross,
    NDOverlayRectangle,
    NDOverlayText,
    NDOverlayEllipse,
} NDOverlayShape_t;

typedef enum {
    NDOverlaySet,
    NDOverlayXOR
} NDOverlayDrawMode_t;

typedef struct {
    std::vector<int> addressOffset;
    bool changed;
    bool freezePositionX;
    bool freezePositionY;
} NDOverlayPvt_t;

typedef struct NDOverlay {
    int use;
    int PositionX;
    int PositionY;
    int SizeX;
    int SizeY;
    int WidthX;
    int WidthY;
    NDOverlayShape_t shape;
    NDOverlayDrawMode_t drawMode;
    int red;
    int green;
    int blue;
    char TimeStampFormat[64];
    int Font;
    char DisplayText[256];
    NDOverlayPvt_t pvt;
} NDOverlay_t;


#define NDPluginOverlayMaxSizeXString           "MAX_SIZE_X"            /* (asynInt32,   r/o) Maximum size of overlay in X dimension */
#define NDPluginOverlayMaxSizeYString           "MAX_SIZE_Y"            /* (asynInt32,   r/o) Maximum size of overlay in Y dimension */
#define NDPluginOverlayNameString               "NAME"                  /* (asynOctet,   r/w) Name of this overlay */
#define NDPluginOverlayUseString                "USE"                   /* (asynInt32,   r/w) Use this overlay? */
#define NDPluginOverlayPositionXString          "OVERLAY_POSITION_X"    /* (asynInt32,   r/w) X position (upper left) of overlay */
#define NDPluginOverlayPositionYString          "OVERLAY_POSITION_Y"    /* (asynInt32,   r/w) Y position (upper left) of overlay */
#define NDPluginOverlayCenterXString            "OVERLAY_CENTER_X"      /* (asynInt32,   r/w) X center of overlay */
#define NDPluginOverlayCenterYString            "OVERLAY_CENTER_Y"      /* (asynInt32,   r/w) Y center of overlay */
#define NDPluginOverlaySizeXString              "OVERLAY_SIZE_X"        /* (asynInt32,   r/o) X size of overlay */
#define NDPluginOverlaySizeYString              "OVERLAY_SIZE_Y"        /* (asynInt32,   r/w) Y size of overlay */
#define NDPluginOverlayWidthXString             "OVERLAY_WIDTH_X"       /* (asynInt32,   r/o) X width of overlay */
#define NDPluginOverlayWidthYString             "OVERLAY_WIDTH_Y"       /* (asynInt32,   r/w) Y width of overlay */
#define NDPluginOverlayShapeString              "OVERLAY_SHAPE"         /* (asynInt32,   r/w) Shape of overlay */
#define NDPluginOverlayDrawModeString           "OVERLAY_DRAW_MODE"     /* (asynInt32,   r/w) Drawing mode for overlay */
#define NDPluginOverlayRedString                "OVERLAY_RED"           /* (asynInt32,   r/w) Red value for overlay */
#define NDPluginOverlayGreenString              "OVERLAY_GREEN"         /* (asynInt32,   r/w) Green value for overlay */
#define NDPluginOverlayBlueString               "OVERLAY_BLUE"          /* (asynInt32,   r/w) Blue value for overlay */
#define NDPluginOverlayTimeStampFormatString    "OVERLAY_TIMESTAMP_FORMAT" /* (asynOctet,r/w) Time stamp format */
#define NDPluginOverlayFontString               "OVERLAY_FONT"          /* (asynInt32,   r/w) Type of Time Stamp to show (if any) */
#define NDPluginOverlayDisplayTextString        "OVERLAY_DISPLAY_TEXT"  /* (asynOctet,   r/w) The text to display */

class epicsShareClass NDPluginOverlay : public NDPluginDriver {
public:
    NDPluginOverlay(const char *portName, int queueSize, int blockingCallbacks, 
                 const char *NDArrayPort, int NDArrayAddr, int maxOverlays, 
                 int maxBuffers, size_t maxMemory,
                 int priority, int stackSize, int maxThreads);
    /* These methods override the virtual methods in the base class */
    void processCallbacks(NDArray *pArray);
    asynStatus writeInt32(asynUser *pasynUser, epicsInt32 value);

protected:
    int NDPluginOverlayMaxSizeX;
    #define FIRST_NDPLUGIN_OVERLAY_PARAM NDPluginOverlayMaxSizeX
    int NDPluginOverlayMaxSizeY;
    int NDPluginOverlayName;
    int NDPluginOverlayUse;
    int NDPluginOverlayPositionX;
    int NDPluginOverlayPositionY;
    int NDPluginOverlayCenterX;
    int NDPluginOverlayCenterY;
    int NDPluginOverlaySizeX;
    int NDPluginOverlaySizeY;
    int NDPluginOverlayWidthX;
    int NDPluginOverlayWidthY;
    int NDPluginOverlayShape;
    int NDPluginOverlayDrawMode;
    int NDPluginOverlayRed;
    int NDPluginOverlayGreen;
    int NDPluginOverlayBlue;
    int NDPluginOverlayTimeStampFormat;
    int NDPluginOverlayFont;
    int NDPluginOverlayDisplayText;
                                
private:
    int maxOverlays_;
    NDArrayInfo prevArrayInfo_;
    std::vector<NDOverlay_t> prevOverlays_;    /* Vector of NDOverlay structures */
    inline void addPixel(NDOverlay_t *pOverlay, int ix, int iy, NDArrayInfo_t *pArrayInfo);
    template <typename epicsType> void doOverlayT(NDArray *pArray, NDOverlay_t *pOverlay, NDArrayInfo_t *pArrayInfo);
    int doOverlay(NDArray *pArray, NDOverlay_t *pOverlay, NDArrayInfo_t *pArrayInfo);
    template <typename epicsType> void setPixel(epicsType *pValue, NDOverlay_t *pOverlay, NDArrayInfo_t *pArrayInfo);
};
    
#endif