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//
// "$Id$"
//
// Rectangle drawing routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2017 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
/**
\file Fl_OpenGL_Graphics_Driver_rect.cxx
\brief OpenGL specific line and polygon drawing with integer coordinates.
*/
#include <config.h>
#include "../../config_lib.h"
#include "Fl_OpenGL_Graphics_Driver.H"
#include <FL/gl.h>
#include <FL/Fl_Gl_Window.H>
#include <FL/Fl_RGB_Image.H>
#include <FL/Fl.H>
// --- line and polygon drawing with integer coordinates
void Fl_OpenGL_Graphics_Driver::point(int x, int y) {
glBegin(GL_POINTS);
glVertex2i(x, y);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::rect(int x, int y, int w, int h) {
glBegin(GL_LINE_LOOP);
glVertex2i(x, y);
glVertex2i(x+w, y);
glVertex2i(x+w, y+h);
glVertex2i(x, y+h);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::rectf(int x, int y, int w, int h) {
if (w<=0 || h<=0) return;
// OpenGL has the natural origin at the bottom left. Drawing in FLTK
// coordinates requires that we shift the rectangle one pixel up.
glBegin(GL_POLYGON);
glVertex2i(x, y-1);
glVertex2i(x+w, y-1);
glVertex2i(x+w, y+h-1);
glVertex2i(x, y+h-1);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::line(int x, int y, int x1, int y1) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x1, y1);
glEnd();
point(x1, y1);
}
void Fl_OpenGL_Graphics_Driver::line(int x, int y, int x1, int y1, int x2, int y2) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glEnd();
point(x2, y2);
}
void Fl_OpenGL_Graphics_Driver::xyline(int x, int y, int x1) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x1, y);
glEnd();
point(x1, y);
}
void Fl_OpenGL_Graphics_Driver::xyline(int x, int y, int x1, int y2) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x1, y);
glVertex2i(x1, y2);
glEnd();
point(x1, y2);
}
void Fl_OpenGL_Graphics_Driver::xyline(int x, int y, int x1, int y2, int x3) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x1, y);
glVertex2i(x1, y2);
glVertex2i(x3, y2);
glEnd();
point(x3, y2);
}
void Fl_OpenGL_Graphics_Driver::yxline(int x, int y, int y1) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x, y1);
glEnd();
point(x, y1);
}
void Fl_OpenGL_Graphics_Driver::yxline(int x, int y, int y1, int x2) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x, y1);
glVertex2i(x2, y1);
glEnd();
point(x2, y1);
}
void Fl_OpenGL_Graphics_Driver::yxline(int x, int y, int y1, int x2, int y3) {
glBegin(GL_LINE_STRIP);
glVertex2i(x, y);
glVertex2i(x, y1);
glVertex2i(x2, y1);
glVertex2i(x2, y3);
glEnd();
point(x2, y3);
}
void Fl_OpenGL_Graphics_Driver::loop(int x0, int y0, int x1, int y1, int x2, int y2) {
glBegin(GL_LINE_LOOP);
glVertex2i(x0, y0);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::loop(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3) {
glBegin(GL_LINE_LOOP);
glVertex2i(x0, y0);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glVertex2i(x3, y3);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::polygon(int x0, int y0, int x1, int y1, int x2, int y2) {
glBegin(GL_POLYGON);
glVertex2i(x0, y0);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::polygon(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3) {
glBegin(GL_POLYGON);
glVertex2i(x0, y0);
glVertex2i(x1, y1);
glVertex2i(x2, y2);
glVertex2i(x3, y3);
glEnd();
}
void Fl_OpenGL_Graphics_Driver::push_clip(int x, int y, int w, int h) {
// TODO: implement OpenGL clipping
if (rstackptr < region_stack_max) rstack[++rstackptr] = 0L;
else Fl::warning("Fl_OpenGL_Graphics_Driver::push_clip: clip stack overflow!\n");
}
int Fl_OpenGL_Graphics_Driver::clip_box(int x, int y, int w, int h, int &X, int &Y, int &W, int &H) {
// TODO: implement OpenGL clipping
X = x; Y = y; W = w, H = h;
return 0;
}
int Fl_OpenGL_Graphics_Driver::not_clipped(int x, int y, int w, int h) {
// TODO: implement OpenGL clipping
return 1;
}
void Fl_OpenGL_Graphics_Driver::restore_clip() {
// TODO: implement OpenGL clipping
fl_clip_state_number++;
}
//
// End of "$Id$".
//
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