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GFL Drawing

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gflDrawPointColor

The gflDrawPointColor function allows to draw a point on a picture. 

GFL_ERROR gflDrawPointColor(
  GFL_BITMAP* src,  
  GFL_INT32 x,  
  GFL_INT32 y,  
  GFL_UINT32 line_width,  
  const GFL_COLOR* line_color,  
  GFL_BITMAP** dst,  
);

Parameters

src
Pointer to a GFL_BITMAP structure.
x
X position.
y
Y position.
line_width
Width of the point (1 à 13).
line_color
Pointer to a GFL_COLOR structure. Color of the point.
dst
Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflDrawLineColor

The gflDrawLineColor function allows to draw a line on a picture. 

GFL_ERROR gflDrawLineColor(
  GFL_BITMAP* src,  
  GFL_INT32 x0,  
  GFL_INT32 y0,  
  GFL_INT32 x1,  
  GFL_INT32 y1,  
  GFL_UINT32 line_width,  
  const GFL_COLOR* line_color,  
  GFL_LINE_STYLE line_style,  
  GFL_BITMAP** dst,  
);

Parameters

src
Pointer to a GFL_BITMAP structure.
x0
X start position.
y0
Y start position.
x1
X end position.
y1
Y end position.
line_width
Width of the line (1 to 13).
line_color
Pointer to a GFL_COLOR structure. Color of the line.
line_style
Works only with a line width of 1.
GFL_LINE_STYLE_SOLID Solid
GFL_LINE_STYLE_DASH Dashes
GFL_LINE_STYLE_DOT Dots
GFL_LINE_STYLE_DASHDOT Alternating dashes and dots
GFL_LINE_STYLE_DASHDOTDOT Alternating dashes and double dots
dst
Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflDrawPolylineColor

The gflDrawPolylineColor function allows to draw a polyline on a picture. 

GFL_ERROR gflDrawPolylineColor(
  GFL_BITMAP* src,  
  const GFL_POINT points[],  
  GFL_INT32 num_points,  
  GFL_UINT32 line_width,  
  const GFL_COLOR* line_color,  
  GFL_LINE_STYLE line_style,  
  GFL_BITMAP** dst,  
);

Parameters

src
Pointer to a GFL_BITMAP structure.
points
Address of a array of GFL_POINT structure.
num_points
Number of points.
line_width
Width fo the line (1 to 13).
line_color
Pointer to a GFL_COLOR structure.
line_style
Works only with a line width of 1.
GFL_LINE_STYLE_SOLID Solid
GFL_LINE_STYLE_DASH Dashes
GFL_LINE_STYLE_DOT Dots
GFL_LINE_STYLE_DASHDOT Alternating dashes and dots
GFL_LINE_STYLE_DASHDOTDOT Alternating dashes and double dots
dst
Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflDrawRectangleColor

The gflDrawRectangleColor function allows to draw a rectangle on a picture. 

GFL_ERROR gflDrawRectangleColor(
  GFL_BITMAP* src,  
  GFL_INT32 x,  
  GFL_INT32 y,  
  GFL_INT32 width,  
  GFL_INT32 height,  
  const GFL_COLOR* fill_color,  
  GFL_UINT32 line_width,  
  const GFL_COLOR* line_color,  
  GFL_LINE_STYLE line_style,  
  GFL_BITMAP** dst,  
);

Parameters

src
Pointer to a GFL_BITMAP structure.
x
X start.
y
Y start.
width
Width of the rectangle.
height
Height of the rectangle.
fill_color
Pointer of a GFL_COLOR structure.
If NULL, no fill.
line_width
Width of the line (1 to 13).
line_color
Pointer of a GFL_COLOR structure.
If NULL, no outline.
line_style
Works only with a line width of 1.
GFL_LINE_STYLE_SOLID Solid
GFL_LINE_STYLE_DASH Dashes
GFL_LINE_STYLE_DOT Dots
GFL_LINE_STYLE_DASHDOT Alternating dashes and dots
GFL_LINE_STYLE_DASHDOTDOT Alternating dashes and double dots
dst
Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflDrawPolygonColor

The gflDrawPolygonColor function allows to draw a poylgone on the picture. 

GFL_ERROR gflDrawPolygonColor(
  GFL_BITMAP* src,  
  const GFL_POINT points[],  
  GFL_INT32 num_points,  
  const GFL_COLOR* fill_color,  
  GFL_UINT32 line_width,  
  const GFL_COLOR* line_color,  
  GFL_LINE_STYLE line_style,  
  GFL_BITMAP** dst,  
);

Parameters

src
Pointer to a GFL_BITMAP structure.
points
Address to an array of GFL_POINT structure.
Closing the polygone is not necessary.
num_points
Number of points.
fill_color
Pointer to a GFL_COLOR structure.
If NULL, no fill.
line_width
Width of the line (1 to 13).
line_color
Pointer to a GFL_COLOR structure.
If NULL, no outline.
line_style
Works only with a line width of 1.
GFL_LINE_STYLE_SOLID Solid
GFL_LINE_STYLE_DASH Dashes
GFL_LINE_STYLE_DOT Dots
GFL_LINE_STYLE_DASHDOT Alternating dashes and dots
GFL_LINE_STYLE_DASHDOTDOT Alternating dashes and double dots
dst
Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.


gflDrawCircleColor

The gflDrawCircleColor function allows to draw a circle on a picture. 

GFL_ERROR gflDrawCircleColor(
  GFL_BITMAP* src,  
  GFL_INT32 x,  
  GFL_INT32 y,  
  GFL_INT32 radius,  
  const GFL_COLOR* fill_color,  
  GFL_UINT32 line_width,  
  const GFL_COLOR* line_color,  
  GFL_LINE_STYLE line_style,  
  GFL_BITMAP** dst,  
);

Parameters

src
Pointer to a GFL_BITMAP structure.
x
X center.
y
Y center.
radius
Radius of the circle.
fill_color
Pointer to a GFL_COLOR structure.
If NULL, no fill.
line_width
Width of the line (1 to 13).
line_color
Pointer to a GFL_COLOR structure.
If NULL, no outline.
line_style
Works only with a line width of 1.
GFL_LINE_STYLE_SOLID Solid
GFL_LINE_STYLE_DASH Dashes
GFL_LINE_STYLE_DOT Dots
GFL_LINE_STYLE_DASHDOT Alternating dashes and dots
GFL_LINE_STYLE_DASHDOTDOT Alternating dashes and double dots
dst
Address of a pointer to a GFL_BITMAP structure. NULL if on the same instance.

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.
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