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- //
- // "$Id: gl_draw.cxx,v 1.7 1999/01/07 19:17:46 mike Exp $"
- //
- // OpenGL drawing support routines for the Fast Light Tool Kit (FLTK).
- //
- // Copyright 1998-1999 by Bill Spitzak and others.
- //
- // This library is free software; you can redistribute it and/or
- // modify it under the terms of the GNU Library General Public
- // License as published by the Free Software Foundation; either
- // version 2 of the License, or (at your option) any later version.
- //
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- // Library General Public License for more details.
- //
- // You should have received a copy of the GNU Library General Public
- // License along with this library; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- // USA.
- //
- // Please report all bugs and problems to "fltk-bugs@easysw.com".
- //
-
- // Functions from <FL/gl.h>
- // See also Fl_Gl_Window and gl_start.C
-
- #include <config.h>
- #if HAVE_GL
-
- #include <FL/Fl.H>
- #include <FL/gl.h>
- #include <FL/x.H>
- #include <FL/fl_draw.H>
- #include "Fl_Gl_Choice.H"
- #include "Fl_Font.H"
- #include <string.h>
-
- void gl_font(int fontid, int size) {fl_font(fontid, size);}
- int gl_height() {return fl_height();}
- int gl_descent() {return fl_descent();}
- double gl_width(const char* s) {return fl_width(s);}
- double gl_width(const char* s, int n) {return fl_width(s,n);}
- double gl_width(uchar c) {return fl_width(c);}
-
- void gl_draw(const char* str, int n) {
- if (!fl_fontsize->listbase) {
- #ifdef WIN32
- int base = fl_fontsize->metr.tmFirstChar;
- int size = fl_fontsize->metr.tmLastChar-base+1;
- HFONT oldFid = (HFONT)SelectObject(fl_gc, fl_fontsize->fid);
- fl_fontsize->listbase = glGenLists(256);
- wglUseFontBitmaps(fl_gc, base, size, fl_fontsize->listbase+base);
- SelectObject(fl_gc, oldFid);
- #else
- int base = fl_xfont->min_char_or_byte2;
- int size = fl_xfont->max_char_or_byte2-base+1;
- fl_fontsize->listbase = glGenLists(256);
- glXUseXFont(fl_xfont->fid, base, size, fl_fontsize->listbase+base);
- #endif
- }
-
- glPushAttrib(GL_LIST_BIT);
- glListBase(fl_fontsize->listbase);
- glCallLists(n, GL_UNSIGNED_BYTE, str);
- glPopAttrib();
- }
-
- void gl_draw(const char* str, int n, int x, int y) {
- glRasterPos2i(x, y);
- gl_draw(str, n);
- }
-
- void gl_draw(const char* str, int n, float x, float y) {
- glRasterPos2f(x, y);
- gl_draw(str, n);
- }
-
- void gl_draw(const char* str) {
- gl_draw(str, strlen(str));
- }
-
- void gl_draw(const char* str, int x, int y) {
- gl_draw(str, strlen(str), x, y);
- }
-
- void gl_draw(const char* str, float x, float y) {
- gl_draw(str, strlen(str), x, y);
- }
-
- static void gl_draw_invert(const char* str, int n, int x, int y) {
- glRasterPos2i(x, -y);
- gl_draw(str, n);
- }
-
- void gl_draw(
- const char* str, // the (multi-line) string
- int x, int y, int w, int h, // bounding box
- Fl_Align align) {
- fl_draw(str, x, -y-h, w, h, align, gl_draw_invert);
- }
-
- void gl_measure(const char* str, int& x, int& y) {fl_measure(str,x,y);}
-
- void gl_rect(int x, int y, int w, int h) {
- if (w < 0) {w = -w; x = x-w;}
- if (h < 0) {h = -h; y = y-h;}
- glBegin(GL_LINE_STRIP);
- glVertex2i(x+w-1, y+h-1);
- glVertex2i(x+w-1, y);
- glVertex2i(x, y);
- glVertex2i(x, y+h-1);
- glVertex2i(x+w, y+h-1);
- glEnd();
- }
-
- #if HAVE_GL_OVERLAY
- extern uchar fl_overlay;
- #endif
-
- void gl_color(Fl_Color i) {
- #if HAVE_GL_OVERLAY
- #ifdef WIN32
- if (fl_overlay) {glIndexi(i ? i : FL_GRAY_RAMP); return;}
- #else
- if (fl_overlay) {glIndexi(int(fl_xpixel(i))); return;}
- #endif
- #endif
- uchar red, green, blue;
- Fl::get_color(i, red, green, blue);
- glColor3ub(red, green, blue);
- }
-
- void gl_draw_image(const uchar* b, int x, int y, int w, int h, int d, int ld) {
- if (!ld) ld = w*d;
- glPixelStorei(GL_UNPACK_ROW_LENGTH, ld/d);
- glRasterPos2i(x,y);
- glDrawPixels(w,h,d<4?GL_RGB:GL_RGBA,GL_UNSIGNED_BYTE,(const ulong*)b);
- }
-
- #endif
-
- //
- // End of "$Id: gl_draw.cxx,v 1.7 1999/01/07 19:17:46 mike Exp $".
- //
-