107 lines
2.6 KiB
Text
107 lines
2.6 KiB
Text
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file pnmPainter.I
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* @author drose
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* @date 2007-02-02
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*/
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/**
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*
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*/
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INLINE PNMPainter::
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~PNMPainter() {
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}
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/**
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* Specifies a PNMBrush that will be used for drawing lines and edges. If the
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* brush is a bitmap brush, its image will be smeared pixelwise along the
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* line.
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*
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* Unlike the PNMImage passed to the constructor, the PNMPainter will take
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* ownership of the pen. It is not necessary to keep a separate pointer to
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* it.
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*/
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INLINE void PNMPainter::
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set_pen(PNMBrush *pen) {
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_pen = pen;
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}
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/**
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* Returns the current pen. See set_pen().
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*/
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INLINE PNMBrush *PNMPainter::
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get_pen() const {
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return _pen;
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}
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/**
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* Specifies a PNMBrush that will be used for filling in the interiors of
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* objects. If the brush is a bitmap brush, its image will be tiled
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* throughout the space.
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*
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* Unlike the PNMImage passed to the constructor, the PNMPainter will take
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* ownership of the fill brush. It is not necessary to keep a separate
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* pointer to it.
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*/
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INLINE void PNMPainter::
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set_fill(PNMBrush *fill) {
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_fill = fill;
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}
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/**
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* Returns the current fill brush. See set_fill().
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*/
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INLINE PNMBrush *PNMPainter::
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get_fill() const {
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return _fill;
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}
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/**
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* Draws an antialiased point on the PNMImage, using the current pen.
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*/
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INLINE void PNMPainter::
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draw_point(float x, float y) {
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draw_line(x, y, x, y);
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}
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/**
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* Called within draw_line() to draw a single point of a mostly-horizontal
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* line.
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*/
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INLINE void PNMPainter::
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draw_hline_point(int x, float xa, float ya, float xd, float yd,
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float pixel_scale) {
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float y = (yd * (x - xa) / xd) + ya;
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int ymax = (int)cceil(y);
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int ymin = (int)cfloor(y);
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if (ymax == ymin) {
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_pen->draw(_image, x, ymin, pixel_scale);
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} else {
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_pen->draw(_image, x, ymax, (y - ymin) * pixel_scale);
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_pen->draw(_image, x, ymin, (ymax - y) * pixel_scale);
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}
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}
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/**
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* Called within draw_line() to draw a single point of a mostly-vertical line.
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*/
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INLINE void PNMPainter::
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draw_vline_point(int y, float xa, float ya, float xd, float yd,
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float pixel_scale) {
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float x = (xd * (y - ya) / yd) + xa;
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int xmax = (int)cceil(x);
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int xmin = (int)cfloor(x);
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if (xmax == xmin) {
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_pen->draw(_image, xmin, y, pixel_scale);
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} else {
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_pen->draw(_image, xmax, y, (x - xmin) * pixel_scale);
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_pen->draw(_image, xmin, y, (xmax - x) * pixel_scale);
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}
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}
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