Lines Matching full:shape

17  *  genpng width height { shape }
18  *    shape ::= color width shape x1 y1 x2 y2
28  * 'shape' is:
34  * Each shape is followed by four numbers, these are two points in the output
36  * line.  The shape is filled if it is preceded by 'filled' (not valid for
38  * precede the shape.
42  *    shape ::= color width shape x1 y1 x2 y2
48  *    shape ::= circle|square|line
58  * precision image: Each shape from the last to the first is checked to see if
60  * color of the shape and the alpha is 1, if not the previous shape is checked.
63  * inside or outside each shape and 'close' points do not contribute to the
160    /* A function to determine if (x,y) is inside the shape.
166     *       -1: the point is outside the shape by more than the filter width (2)
167     *        0: the point may be inside the shape
168     *       +1: the point is inside the shape by more than the filter width
184  * We want the contribution of each shape to the sample corresponding to each
186  * dimensions, finding each point within the shape and assigning that a value
187  * '1' while leaving every point outside the shape with value '0' then
192  * 1) If the pixel coordinate is within the shape assume the sample has the
193  *    shape color and is opaque, else assume there is no contribution from
194  *    the shape.
200  * 2) If the shape is within a square of size 1x1 centered on the pixel assume
201  *    that the shape obscures an amount of the pixel equal to its area within
216  *    shape, unfortunately this means evaluating Si(x), the integral of sinc(x),
221  * 0 or 1, depending on whether the sub-pixel is within or outside the shape.
297     * which tells us whether a point is inside or outside the shape.  First  in alpha_calc()
303          return 0; /* all samples outside the shape */  in alpha_calc()
306          return 1; /* all samples inside the shape */  in alpha_calc()
341 /* These are the shape functions. */
669    fprintf(stderr, "genpng: %s: not a valid shape name\n", arg);  in shape_of()
676    /* shape ::= color width shape x1 y1 x2 y2 */  in parse_arg()
704    /* Fill in the pixel by checking each shape (args[nargs]) for effects on  in pixel()
825       fprintf(stderr, "genpng: usage: genpng [--8bit] width height {shape}\n"  in main()
827          " containing the given shape or shapes.  Shapes are defined:\n"  in main()
829          "  shape ::= color width shape x1 y1 x2 y2\n"  in main()
833          "  shape ::= circle|square|line\n"  in main()
840          " to draw the shape or 'filled' to indicate that the shape should\n"  in main()