class mrpt::img::CEnhancedMetaFile¶

This class represents a Windows Enhanced Meta File (EMF) for generating and saving graphics.

If used under Linux, a “.png”, non-vectorial, file will be generated instead.

#include <mrpt/img/CEnhancedMetaFile.h>

class CEnhancedMetaFile: public mrpt::img::CCanvas
{
public:
    // construction

    CEnhancedMetaFile(const std::string& targetFileName, int scaleFactor = 1);

    //
methods

    static void LINUX_IMG_WIDTH(int value);
    static int LINUX_IMG_WIDTH();
    static void LINUX_IMG_HEIGHT(int value);
    static int LINUX_IMG_HEIGHT();
    virtual void setPixel(int x, int y, size_t color);
    virtual size_t getWidth() const;
    virtual size_t getHeight() const;
    virtual void drawImage(int x, int y, const mrpt::img::CImage& img);

    virtual void line(
        int x0,
        int y0,
        int x1,
        int y1,
        const mrpt::img::TColor color,
        unsigned int width = 1,
        TPenStyle penStyle = psSolid
        );

    virtual void textOut(int x0, int y0, const std::string& str, const mrpt::img::TColor color);

    virtual void selectVectorTextFont(
        const std::string& fontName,
        int fontSize,
        bool bold = false,
        bool italic = false
        );

    virtual void drawImage(int x, int y, const mrpt::img::CImage& img, float rotation, float scale);

    virtual void rectangle(
        int x0,
        int y0,
        int x1,
        int y1,
        const mrpt::img::TColor color,
        unsigned int width = 1
        );

    template <class T>
    void ellipseGaussian(
        mrpt::math::CMatrixDynamic<T>* cov2D,
        T mean_x,
        T mean_y,
        float confIntervalStds = 2,
        const mrpt::img::TColor& color = mrpt::img::TColor(255, 255, 255),
        unsigned int width = 1,
        int nEllipsePoints = 20
        );
};

Inherited Members¶

public:
    // enums

    enum TPenStyle;

    //
methods

    virtual void setPixel(int x, int y, size_t color) = 0;
    virtual size_t getWidth() const = 0;
    virtual size_t getHeight() const = 0;

    virtual void line(
        int x0,
        int y0,
        int x1,
        int y1,
        const mrpt::img::TColor color,
        unsigned int width = 1,
        TPenStyle penStyle = psSolid
        );

    void rectangle(int x0, int y0, int x1, int y1, const mrpt::img::TColor color, unsigned int width = 1);

    void triangle(
        int x0,
        int y0,
        int size,
        const mrpt::img::TColor color,
        bool inferior = true,
        unsigned int width = 1
        );

    virtual void filledRectangle(int x0, int y0, int x1, int y1, const mrpt::img::TColor color);
    virtual void textOut(int x0, int y0, const std::string& str, const mrpt::img::TColor color);
    virtual void selectTextFont(const std::string& fontName);
    virtual void drawImage(int x, int y, const mrpt::img::CImage& img);

    void drawMark(
        int x0,
        int y0,
        const mrpt::img::TColor color,
        char type,
        int size = 5,
        unsigned int width = 1
        );

    virtual void drawImage(int x, int y, const mrpt::img::CImage& img, float rotation, float scale);

    virtual void drawCircle(
        int x,
        int y,
        int radius,
        const mrpt::img::TColor& color = mrpt::img::TColor(255, 255, 255),
        unsigned int width = 1
        );

    void ellipseGaussian(
        const mrpt::math::CMatrixFixed<double, 2, 2>& cov2D,
        const double mean_x,
        const double mean_y,
        double confIntervalStds = 2,
        const mrpt::img::TColor& color = mrpt::img::TColor(255, 255, 255),
        unsigned int width = 1,
        int nEllipsePoints = 20
        );

    template <class FEATURELIST>
    void drawFeaturesSimple(
        const FEATURELIST& list,
        const TColor& color = TColor::red(),
        const int cross_size = 5
        );

    template <class FEATURELIST>
    void drawFeatures(
        const FEATURELIST& list,
        const TColor& color = TColor::red(),
        const bool showIDs = false,
        const bool showResponse = false,
        const bool showScale = false,
        const char marker = '+'
        );

Construction¶

CEnhancedMetaFile(const std::string& targetFileName, int scaleFactor = 1)

Constructor.

Parameters:

targetFileName	This file will be created and the EMF saved there.
scaleFactor	All coordinates in draw commands will be internally multiplied by this scale, to provide a way of obtaining “subpixel” drawing.

Methods¶

static void LINUX_IMG_WIDTH(int value)

In Linux, the size of the bitmap image that emulates the EMF (Default:800)

static void LINUX_IMG_HEIGHT(int value)

In Linux, the size of the bitmap image that emulates the EMF (Default:600)

virtual void setPixel(int x, int y, size_t color)

Changes the value of the pixel (x,y).

Pixel coordinates starts at the left-top corner of the image, and start in (0,0). The meaning of the parameter “color” depends on the implementation: it will usually be a 24bit RGB value (0x00RRGGBB), but it can also be just a 8bit gray level. This method must support (x,y) values OUT of the actual image size without neither raising exceptions, nor leading to memory access errors.

virtual size_t getWidth() const

Returns the width of the image in pixels (this currently has no applicability for a EMF file…)

virtual size_t getHeight() const

Returns the height of the image in pixels (this currently has no applicability for a EMF file…)

virtual void drawImage(int x, int y, const mrpt::img::CImage& img)

Draws an image as a bitmap at a given position.

Parameters:

x0	The top-left corner x coordinates on this canvas where the image is to be drawn
y0	The top-left corner y coordinates on this canvas where the image is to be drawn
img	The image to be drawn in this canvas This method may be redefined in some classes implementing this interface in a more appropiate manner.

virtual void line(
    int x0,
    int y0,
    int x1,
    int y1,
    const mrpt::img::TColor color,
    unsigned int width = 1,
    TPenStyle penStyle = psSolid
    )

Draws a line.

Parameters:

x0	The starting point x coordinate
y0	The starting point y coordinate
x1	The end point x coordinate
y1	The end point y coordinate
color	The color of the line
width	The desired width of the line (this is IGNORED in this virtual class) This method may be redefined in some classes implementing this interface in a more appropiate manner.

virtual void textOut(int x0, int y0, const std::string& str, const mrpt::img::TColor color)

Places a text label.

Parameters:

x0	The x coordinates
y0	The y coordinates
str	The string to put
color	The text color
fontSize	The font size, in “points” This method may be redefined in some classes implementing this interface in a more appropiate manner.