4f4a8fc3c7
(to clarify static exception LGPL by changing license references) git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8864 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
418 lines
12 KiB
C++
418 lines
12 KiB
C++
//
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// "$Id$"
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//
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// OpenGL visual selection code for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2010 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include <config.h>
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#if HAVE_GL
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# include <FL/Fl.H>
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# include <FL/x.H>
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# include <stdlib.h>
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# include "Fl_Gl_Choice.H"
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# include <FL/gl_draw.H>
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# include "flstring.h"
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# include <FL/fl_utf8.h>
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# ifdef __APPLE__
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# include <ApplicationServices/ApplicationServices.h>
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# include <FL/Fl_Window.H>
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# endif
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# ifdef WIN32
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void fl_save_dc(HWND, HDC);
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# endif
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static Fl_Gl_Choice *first;
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// this assumes one of the two arguments is zero:
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// We keep the list system in Win32 to stay compatible and interpret
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// the list later...
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Fl_Gl_Choice *Fl_Gl_Choice::find(int m, const int *alistp) {
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Fl_Gl_Choice *g;
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for (g = first; g; g = g->next)
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if (g->mode == m && g->alist == alistp)
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return g;
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#if defined(USE_X11)
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const int *blist;
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int list[32];
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if (alistp)
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blist = alistp;
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else {
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int n = 0;
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if (m & FL_INDEX) {
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list[n++] = GLX_BUFFER_SIZE;
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list[n++] = 8; // glut tries many sizes, but this should work...
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} else {
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list[n++] = GLX_RGBA;
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list[n++] = GLX_GREEN_SIZE;
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list[n++] = (m & FL_RGB8) ? 8 : 1;
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if (m & FL_ALPHA) {
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list[n++] = GLX_ALPHA_SIZE;
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list[n++] = (m & FL_RGB8) ? 8 : 1;
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}
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if (m & FL_ACCUM) {
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list[n++] = GLX_ACCUM_GREEN_SIZE;
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list[n++] = 1;
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if (m & FL_ALPHA) {
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list[n++] = GLX_ACCUM_ALPHA_SIZE;
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list[n++] = 1;
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}
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}
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}
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if (m & FL_DOUBLE) {
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list[n++] = GLX_DOUBLEBUFFER;
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}
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if (m & FL_DEPTH) {
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list[n++] = GLX_DEPTH_SIZE; list[n++] = 1;
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}
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if (m & FL_STENCIL) {
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list[n++] = GLX_STENCIL_SIZE; list[n++] = 1;
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}
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if (m & FL_STEREO) {
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list[n++] = GLX_STEREO;
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}
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# if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample)
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if (m & FL_MULTISAMPLE) {
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list[n++] = GLX_SAMPLES_SGIS;
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list[n++] = 4; // value Glut uses
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}
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# endif
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list[n] = 0;
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blist = list;
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}
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fl_open_display();
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XVisualInfo *visp = glXChooseVisual(fl_display, fl_screen, (int *)blist);
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if (!visp) {
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# if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample)
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if (m&FL_MULTISAMPLE) return find(m&~FL_MULTISAMPLE,0);
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# endif
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return 0;
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}
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#elif defined(__APPLE_QUARTZ__)
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// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
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const int *blist;
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int list[32];
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if (alistp)
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blist = alistp;
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else {
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int n = 0;
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if (m & FL_INDEX) {
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list[n++] = AGL_BUFFER_SIZE;
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list[n++] = 8; // glut tries many sizes, but this should work...
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} else {
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list[n++] = AGL_RGBA;
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list[n++] = AGL_GREEN_SIZE;
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list[n++] = (m & FL_RGB8) ? 8 : 1;
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if (m & FL_ALPHA) {
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list[n++] = AGL_ALPHA_SIZE;
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list[n++] = (m & FL_RGB8) ? 8 : 1;
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}
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if (m & FL_ACCUM) {
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list[n++] = AGL_ACCUM_GREEN_SIZE;
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list[n++] = 1;
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if (m & FL_ALPHA) {
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list[n++] = AGL_ACCUM_ALPHA_SIZE;
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list[n++] = 1;
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}
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}
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}
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if (m & FL_DOUBLE) {
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list[n++] = AGL_DOUBLEBUFFER;
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}
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if (m & FL_DEPTH) {
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list[n++] = AGL_DEPTH_SIZE; list[n++] = 24;
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}
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if (m & FL_STENCIL) {
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list[n++] = AGL_STENCIL_SIZE; list[n++] = 1;
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}
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# ifdef AGL_STEREO
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if (m & FL_STEREO) {
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list[n++] = AGL_STEREO;
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}
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# endif
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list[n] = AGL_NONE;
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blist = list;
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}
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fl_open_display();
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AGLPixelFormat fmt = aglChoosePixelFormat(NULL, 0, (GLint*)blist);
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if (!fmt) return 0;
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#elif defined(WIN32)
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// Replacement for ChoosePixelFormat() that finds one with an overlay
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// if possible:
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if (!fl_gc) fl_GetDC(0);
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int pixelformat = 0;
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PIXELFORMATDESCRIPTOR chosen_pfd;
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for (int i = 1; ; i++) {
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PIXELFORMATDESCRIPTOR pfd;
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if (!DescribePixelFormat(fl_gc, i, sizeof(pfd), &pfd)) break;
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// continue if it does not satisfy our requirements:
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if (~pfd.dwFlags & (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL)) continue;
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if (pfd.iPixelType != ((m&FL_INDEX)?PFD_TYPE_COLORINDEX:PFD_TYPE_RGBA)) continue;
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if ((m & FL_ALPHA) && !pfd.cAlphaBits) continue;
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if ((m & FL_ACCUM) && !pfd.cAccumBits) continue;
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if ((!(m & FL_DOUBLE)) != (!(pfd.dwFlags & PFD_DOUBLEBUFFER))) continue;
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if ((!(m & FL_STEREO)) != (!(pfd.dwFlags & PFD_STEREO))) continue;
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if ((m & FL_DEPTH) && !pfd.cDepthBits) continue;
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if ((m & FL_STENCIL) && !pfd.cStencilBits) continue;
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// see if better than the one we have already:
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if (pixelformat) {
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// offering non-generic rendering is better (read: hardware accelleration)
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if (!(chosen_pfd.dwFlags & PFD_GENERIC_FORMAT) &&
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(pfd.dwFlags & PFD_GENERIC_FORMAT)) continue;
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// offering overlay is better:
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else if (!(chosen_pfd.bReserved & 15) && (pfd.bReserved & 15)) {}
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// otherwise more bit planes is better:
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else if (chosen_pfd.cColorBits > pfd.cColorBits) continue;
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else if (chosen_pfd.cDepthBits > pfd.cDepthBits) continue;
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}
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pixelformat = i;
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chosen_pfd = pfd;
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}
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//printf("Chosen pixel format is %d\n", pixelformat);
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if (!pixelformat) return 0;
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#else
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# error platform unsupported
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#endif
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g = new Fl_Gl_Choice;
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g->mode = m;
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g->alist = alistp;
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g->next = first;
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first = g;
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#if defined(USE_X11)
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g->vis = visp;
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if (/*MaxCmapsOfScreen(ScreenOfDisplay(fl_display,fl_screen))==1 && */
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visp->visualid == fl_visual->visualid &&
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!fl_getenv("MESA_PRIVATE_CMAP"))
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g->colormap = fl_colormap;
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else
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g->colormap = XCreateColormap(fl_display, RootWindow(fl_display,fl_screen),
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visp->visual, AllocNone);
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# elif defined(WIN32)
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g->pixelformat = pixelformat;
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g->pfd = chosen_pfd;
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# elif defined(__APPLE_QUARTZ__)
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// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
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g->pixelformat = fmt;
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# else
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# error unsupported platform
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# endif
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return g;
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}
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static GLContext *context_list = 0;
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static int nContext = 0, NContext = 0;
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static void add_context(GLContext ctx) {
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if (!ctx) return;
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if (nContext==NContext) {
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if (!NContext) NContext = 8;
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NContext *= 2;
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context_list = (GLContext*)realloc(
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context_list, NContext*sizeof(GLContext));
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}
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context_list[nContext++] = ctx;
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}
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static void del_context(GLContext ctx) {
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int i;
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for (i=0; i<nContext; i++) {
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if (context_list[i]==ctx) {
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memmove(context_list+i, context_list+i+1,
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(nContext-i-1) * sizeof(GLContext));
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context_list[--nContext] = 0;
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break;
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}
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}
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if (!nContext) gl_remove_displaylist_fonts();
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}
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#if defined(USE_X11)
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GLContext fl_create_gl_context(XVisualInfo* vis) {
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GLContext shared_ctx = 0;
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if (context_list && nContext) shared_ctx = context_list[0];
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GLContext context = glXCreateContext(fl_display, vis, shared_ctx, 1);
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if (context)
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add_context(context);
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return context;
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}
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#elif defined(WIN32)
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GLContext fl_create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g, int layer) {
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Fl_X* i = Fl_X::i(window);
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HDC hdc = i->private_dc;
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if (!hdc) {
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hdc = i->private_dc = GetDCEx(i->xid, 0, DCX_CACHE);
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fl_save_dc(i->xid, hdc);
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SetPixelFormat(hdc, g->pixelformat, (PIXELFORMATDESCRIPTOR*)(&g->pfd));
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# if USE_COLORMAP
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if (fl_palette) SelectPalette(hdc, fl_palette, FALSE);
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# endif
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}
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GLContext context =
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layer ? wglCreateLayerContext(hdc, layer) : wglCreateContext(hdc);
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if (context) {
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if (context_list && nContext)
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wglShareLists(context_list[0], context);
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add_context(context);
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}
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return context;
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}
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# elif defined(__APPLE_QUARTZ__)
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#if !(MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5 && __LP64__)
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static CGrafPtr fl_GetWindowPort(WindowRef window)
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{
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typedef CGrafPtr (*wf)(WindowRef);
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static wf f = NULL;
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if ( ! f) f = (wf)Fl_X::get_carbon_function("GetWindowPort");
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return (*f)(window);
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}
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#endif
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// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
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GLContext fl_create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g, int layer) {
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GLContext context, shared_ctx = 0;
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if (context_list && nContext) shared_ctx = context_list[0];
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context = aglCreateContext( g->pixelformat, shared_ctx);
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if (!context) return 0;
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add_context((GLContext)context);
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if ( window->parent() ) {
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int H = window->window()->h();
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GLint rect[] = { window->x(), H-window->h()-window->y(), window->w(), window->h() };
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aglSetInteger( (GLContext)context, AGL_BUFFER_RECT, rect );
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aglEnable( (GLContext)context, AGL_BUFFER_RECT );
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}
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
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#if __LP64__
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// 64 bit version
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aglSetWindowRef(context, Fl_X::i(window)->window_ref() );
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#else
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// 32 bit version >= 10.5
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if (aglSetWindowRef != NULL)
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aglSetWindowRef(context, Fl_X::i(window)->window_ref() );
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else
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aglSetDrawable( context, fl_GetWindowPort( Fl_X::i(window)->window_ref() ) );
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#endif
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#else
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// 32 bit version < 10.5
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aglSetDrawable( context, fl_GetWindowPort( Fl_X::i(window)->window_ref() ) );
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#endif
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return (context);
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}
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# else
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# error unsupported platform
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# endif
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static GLContext cached_context;
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static Fl_Window* cached_window;
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void fl_set_gl_context(Fl_Window* w, GLContext context) {
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if (context != cached_context || w != cached_window) {
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cached_context = context;
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cached_window = w;
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# if defined(USE_X11)
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glXMakeCurrent(fl_display, fl_xid(w), context);
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# elif defined(WIN32)
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wglMakeCurrent(Fl_X::i(w)->private_dc, context);
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# elif defined(__APPLE_QUARTZ__)
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// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
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if ( w->parent() ) { //: resize our GL buffer rectangle
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int H = w->window()->h();
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GLint rect[] = { w->x(), H-w->h()-w->y(), w->w(), w->h() };
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aglSetInteger( context, AGL_BUFFER_RECT, rect );
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aglEnable( context, AGL_BUFFER_RECT );
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}
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
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#if __LP64__
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// 64 bit version
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aglSetWindowRef(context, Fl_X::i(w)->window_ref() );
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#else
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// 32 bit version >= 10.5
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if (aglSetWindowRef != NULL)
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aglSetWindowRef(context, Fl_X::i(w)->window_ref() );
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else
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aglSetDrawable( context, fl_GetWindowPort( Fl_X::i(w)->window_ref() ) );
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#endif
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#else
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// 32 bit version < 10.5
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aglSetDrawable( context, fl_GetWindowPort( Fl_X::i(w)->window_ref() ) );
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#endif
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aglSetCurrentContext(context);
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# else
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# error unsupported platform
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# endif
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}
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}
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void fl_no_gl_context() {
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cached_context = 0;
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cached_window = 0;
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# if defined(USE_X11)
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glXMakeCurrent(fl_display, 0, 0);
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# elif defined(WIN32)
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wglMakeCurrent(0, 0);
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# elif defined(__APPLE_QUARTZ__)
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// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
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AGLContext ctx = aglGetCurrentContext();
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
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if (aglSetWindowRef != NULL)
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{ if(ctx) aglSetWindowRef(ctx, NULL ); }
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else
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#endif
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if(ctx) aglSetDrawable( ctx, NULL );
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aglSetCurrentContext(0);
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# else
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# error unsupported platform
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# endif
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}
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void fl_delete_gl_context(GLContext context) {
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if (cached_context == context) fl_no_gl_context();
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# if defined(USE_X11)
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glXDestroyContext(fl_display, context);
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# elif defined(WIN32)
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wglDeleteContext(context);
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# elif defined(__APPLE_QUARTZ__)
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// warning: the Quartz version should probably use Core GL (CGL) instead of AGL
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aglDestroyContext( context );
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# else
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# error unsupported platform
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# endif
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del_context(context);
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}
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#endif // HAVE_GL
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//
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// End of "$Id$".
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//
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