GFL Drawing

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.