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libcaca primitives drawing(3caca)   libcaca  libcaca primitives drawing(3caca)

NAME
       libcaca primitives drawing -

   Functions
       __extern int caca_draw_line (caca_canvas_t *, int, int, int, int,
	   uint32_t)
	   Draw a line on the canvas using the given character.
       __extern int caca_draw_polyline (caca_canvas_t *, int const x[], int
	   const y[], int, uint32_t)
	   Draw a polyline.
       __extern int caca_draw_thin_line (caca_canvas_t *, int, int, int, int)
	   Draw a thin line on the canvas, using ASCII art.
       __extern int caca_draw_thin_polyline (caca_canvas_t *, int const x[],
	   int const y[], int)
	   Draw an ASCII art thin polyline.
       __extern int caca_draw_circle (caca_canvas_t *, int, int, int,
	   uint32_t)
	   Draw a circle on the canvas using the given character.
       __extern int caca_draw_ellipse (caca_canvas_t *, int, int, int, int,
	   uint32_t)
	   Draw an ellipse on the canvas using the given character.
       __extern int caca_draw_thin_ellipse (caca_canvas_t *, int, int, int,
	   int)
	   Draw a thin ellipse on the canvas.
       __extern int caca_fill_ellipse (caca_canvas_t *, int, int, int, int,
	   uint32_t)
	   Fill an ellipse on the canvas using the given character.
       __extern int caca_draw_box (caca_canvas_t *, int, int, int, int,
	   uint32_t)
	   Draw a box on the canvas using the given character.
       __extern int caca_draw_thin_box (caca_canvas_t *, int, int, int, int)
	   Draw a thin box on the canvas.
       __extern int caca_draw_cp437_box (caca_canvas_t *, int, int, int, int)
	   Draw a box on the canvas using CP437 characters.
       __extern int caca_fill_box (caca_canvas_t *, int, int, int, int,
	   uint32_t)
	   Fill a box on the canvas using the given character.
       __extern int caca_draw_triangle (caca_canvas_t *, int, int, int, int,
	   int, int, uint32_t)
	   Draw a triangle on the canvas using the given character.
       __extern int caca_draw_thin_triangle (caca_canvas_t *, int, int, int,
	   int, int, int)
	   Draw a thin triangle on the canvas.
       __extern int caca_fill_triangle (caca_canvas_t *, int, int, int, int,
	   int, int, uint32_t)
	   Fill a triangle on the canvas using the given character.
       __extern int caca_fill_triangle_textured (caca_canvas_t *cv, int
	   coords[6], caca_canvas_t *tex, float uv[6])
	   Fill a triangle on the canvas using an arbitrary-sized texture.

Detailed Description
       These functions provide routines for primitive drawing, such as lines,
       boxes, triangles and ellipses.

Function Documentation
   __extern int caca_draw_line (caca_canvas_t *cv, intx1, inty1, intx2, inty2,
       uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x1 X coordinate of the first point.
	   y1 Y coordinate of the first point.
	   x2 X coordinate of the second point.
	   y2 Y coordinate of the second point.
	   ch UTF-32 character to be used to draw the line.

       Returns:
	   This function always returns 0.

       Referenced by caca_draw_box(), caca_draw_triangle(), and
       caca_fill_ellipse().

   __extern int caca_draw_polyline (caca_canvas_t *cv, int constx[], int
       consty[], intn, uint32_tch)
       Draw a polyline on the canvas using the given character and coordinate
       arrays. The first and last points are not connected, hence in order to
       draw a polygon you need to specify the starting point at the end of the
       list as well.

       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x Array of X coordinates. Must have n + 1 elements.
	   y Array of Y coordinates. Must have n + 1 elements.
	   n Number of lines to draw.
	   ch UTF-32 character to be used to draw the lines.

       Returns:
	   This function always returns 0.

   __extern int caca_draw_thin_line (caca_canvas_t *cv, intx1, inty1, intx2,
       inty2)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x1 X coordinate of the first point.
	   y1 Y coordinate of the first point.
	   x2 X coordinate of the second point.
	   y2 Y coordinate of the second point.

       Returns:
	   This function always returns 0.

       Referenced by caca_draw_thin_triangle().

   __extern int caca_draw_thin_polyline (caca_canvas_t *cv, int constx[], int
       consty[], intn)
       Draw a thin polyline on the canvas using the given coordinate arrays
       and with ASCII art. The first and last points are not connected, so in
       order to draw a polygon you need to specify the starting point at the
       end of the list as well.

       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x Array of X coordinates. Must have n + 1 elements.
	   y Array of Y coordinates. Must have n + 1 elements.
	   n Number of lines to draw.

       Returns:
	   This function always returns 0.

   __extern int caca_draw_circle (caca_canvas_t *cv, intx, inty, intr,
       uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x Center X coordinate.
	   y Center Y coordinate.
	   r Circle radius.
	   ch UTF-32 character to be used to draw the circle outline.

       Returns:
	   This function always returns 0.

   __extern int caca_draw_ellipse (caca_canvas_t *cv, intxo, intyo, inta,
       intb, uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   xo Center X coordinate.
	   yo Center Y coordinate.
	   a Ellipse X radius.
	   b Ellipse Y radius.
	   ch UTF-32 character to be used to draw the ellipse outline.

       Returns:
	   This function always returns 0.

   __extern int caca_draw_thin_ellipse (caca_canvas_t *cv, intxo, intyo, inta,
       intb)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   xo Center X coordinate.
	   yo Center Y coordinate.
	   a Ellipse X radius.
	   b Ellipse Y radius.

       Returns:
	   This function always returns 0.

   __extern int caca_fill_ellipse (caca_canvas_t *cv, intxo, intyo, inta,
       intb, uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   xo Center X coordinate.
	   yo Center Y coordinate.
	   a Ellipse X radius.
	   b Ellipse Y radius.
	   ch UTF-32 character to be used to fill the ellipse.

       Returns:
	   This function always returns 0.

       References caca_draw_line().

   __extern int caca_draw_box (caca_canvas_t *cv, intx, inty, intw, inth,
       uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x X coordinate of the upper-left corner of the box.
	   y Y coordinate of the upper-left corner of the box.
	   w Width of the box.
	   h Height of the box.
	   ch UTF-32 character to be used to draw the box.

       Returns:
	   This function always returns 0.

       References caca_draw_line().

   __extern int caca_draw_thin_box (caca_canvas_t *cv, intx, inty, intw, inth)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x X coordinate of the upper-left corner of the box.
	   y Y coordinate of the upper-left corner of the box.
	   w Width of the box.
	   h Height of the box.

       Returns:
	   This function always returns 0.

   __extern int caca_draw_cp437_box (caca_canvas_t *cv, intx, inty, intw,
       inth)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x X coordinate of the upper-left corner of the box.
	   y Y coordinate of the upper-left corner of the box.
	   w Width of the box.
	   h Height of the box.

       Returns:
	   This function always returns 0.

   __extern int caca_fill_box (caca_canvas_t *cv, intx, inty, intw, inth,
       uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x X coordinate of the upper-left corner of the box.
	   y Y coordinate of the upper-left corner of the box.
	   w Width of the box.
	   h Height of the box.
	   ch UTF-32 character to be used to draw the box.

       Returns:
	   This function always returns 0.

       References caca_add_dirty_rect(), and caca_put_char().

       Referenced by caca_conio_clreol().

   __extern int caca_draw_triangle (caca_canvas_t *cv, intx1, inty1, intx2,
       inty2, intx3, inty3, uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x1 X coordinate of the first point.
	   y1 Y coordinate of the first point.
	   x2 X coordinate of the second point.
	   y2 Y coordinate of the second point.
	   x3 X coordinate of the third point.
	   y3 Y coordinate of the third point.
	   ch UTF-32 character to be used to draw the triangle outline.

       Returns:
	   This function always returns 0.

       References caca_draw_line().

   __extern int caca_draw_thin_triangle (caca_canvas_t *cv, intx1, inty1,
       intx2, inty2, intx3, inty3)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x1 X coordinate of the first point.
	   y1 Y coordinate of the first point.
	   x2 X coordinate of the second point.
	   y2 Y coordinate of the second point.
	   x3 X coordinate of the third point.
	   y3 Y coordinate of the third point.

       Returns:
	   This function always returns 0.

       References caca_draw_thin_line().

   __extern int caca_fill_triangle (caca_canvas_t *cv, intx1, inty1, intx2,
       inty2, intx3, inty3, uint32_tch)
       This function never fails.

       Parameters:
	   cv The handle to the libcaca canvas.
	   x1 X coordinate of the first point.
	   y1 Y coordinate of the first point.
	   x2 X coordinate of the second point.
	   y2 Y coordinate of the second point.
	   x3 X coordinate of the third point.
	   y3 Y coordinate of the third point.
	   ch UTF-32 character to be used to fill the triangle.

       Returns:
	   This function always returns 0.

       References caca_fill_triangle(), and caca_put_char().

       Referenced by caca_fill_triangle().

   __extern int caca_fill_triangle_textured (caca_canvas_t *cv, intcoords[6],
       caca_canvas_t *tex, floatuv[6])
       This function fails if one or both the canvas are missing

       Parameters:
	   cv The handle to the libcaca canvas.
	   coords The coordinates of the triangle (3{x,y})
	   tex The handle of the canvas texture.
	   uv The coordinates of the texture (3{u,v})

       Returns:
	   This function return 0 if ok, -1 if canvas or texture are missing.

Author
       Generated automatically by Doxygen for libcaca from the source code.

Version 0.99.beta18		Tue Jun 19 20libcaca primitives drawing(3caca)
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