From e7d805a88ca71a0e6499fe72830e58fe594ef05b Mon Sep 17 00:00:00 2001 From: Michael R Sweet Date: Tue, 6 Oct 1998 18:46:47 +0000 Subject: Commited Gustavo Hime's NT patches/fixes. git-svn-id: file:///fltk/svn/fltk/trunk@7 ea41ed52-d2ee-0310-a9c1-e6b18d33e121 --- src/gl_start.cxx | 196 +++++++++++++++++++++++++++---------------------------- 1 file changed, 98 insertions(+), 98 deletions(-) (limited to 'src/gl_start.cxx') diff --git a/src/gl_start.cxx b/src/gl_start.cxx index 255a78127..7fa20dbbb 100644 --- a/src/gl_start.cxx +++ b/src/gl_start.cxx @@ -1,98 +1,98 @@ -// Code to switch current fltk drawing context in/out of GL "mode": - -// You MUST use gl_visual() to select the default visual before doing -// show() of any windows. Mesa will crash if you try to use a visual -// not returned by glxChooseVisual. - -// This does not work with Fl_Double_Window's! It will try to draw -// into the front buffer. Depending on the system this will either -// crash or do nothing (when pixmaps are being used as back buffer -// and GL is being done by hardware), work correctly (when GL is done -// with software, such as Mesa), or draw into the front buffer and -// be erased when the buffers are swapped (when double buffer hardware -// is being used) - -#include -#if HAVE_GL - -#include -#include -#include -#include - -#include "Fl_Gl_Choice.H" - -extern GLXContext fl_first_context; // in Fl_Gl_Choice.C -extern int fl_clip_state_number; // in fl_rect.C - -static GLXContext context; -static int clip_state_number; -static int pw, ph; - -#ifdef WIN32 -static int default_mode; -#endif - -Region XRectangleRegion(int x, int y, int w, int h); // in fl_rect.C - -void gl_start() { -#ifdef WIN32 - HDC hdc = fl_private_dc(Fl_Window::current(), default_mode,0); - if (!context) { - context = wglCreateContext(hdc); - if (!fl_first_context) fl_first_context = context; - else wglShareLists(fl_first_context, context); - } - wglMakeCurrent(hdc, context); -#else - if (!context) { - context = glXCreateContext(fl_display, fl_visual, fl_first_context, 1); - if (!context) Fl::fatal("OpenGL does not support this visual"); - if (!fl_first_context) fl_first_context = context; - } - glXMakeCurrent(fl_display, fl_window, context); - glXWaitX(); -#endif - if (pw != Fl_Window::current()->w() || ph != Fl_Window::current()->h()) { - pw = Fl_Window::current()->w(); - ph = Fl_Window::current()->h(); - glLoadIdentity(); - glViewport(0, 0, pw, ph); - glOrtho(0, pw, 0, ph, -1, 1); - glDrawBuffer(GL_FRONT); - } - if (clip_state_number != fl_clip_state_number) { - clip_state_number = fl_clip_state_number; - int x, y, w, h; - if (fl_clip_box(0, 0, Fl_Window::current()->w(), Fl_Window::current()->h(), - x, y, w, h)) { - fl_clip_region(XRectangleRegion(x,y,w,h)); - glScissor(x, Fl_Window::current()->h()-(y+h), w, h); - glEnable(GL_SCISSOR_TEST); - } else { - glDisable(GL_SCISSOR_TEST); - } - } -} - -void gl_finish() { -#ifdef WIN32 - glFlush(); -#else - glXWaitGL(); -#endif -} - -int Fl::gl_visual(int mode, int *alist) { -#ifdef WIN32 - default_mode = mode; -#else - Fl_Gl_Choice *c = Fl_Gl_Choice::find(mode,alist); - if (!c) return 0; - fl_visual = c->vis; - fl_colormap = c->colormap; -#endif - return 1; -} - -#endif +// Code to switch current fltk drawing context in/out of GL "mode": + +// You MUST use gl_visual() to select the default visual before doing +// show() of any windows. Mesa will crash if you try to use a visual +// not returned by glxChooseVisual. + +// This does not work with Fl_Double_Window's! It will try to draw +// into the front buffer. Depending on the system this will either +// crash or do nothing (when pixmaps are being used as back buffer +// and GL is being done by hardware), work correctly (when GL is done +// with software, such as Mesa), or draw into the front buffer and +// be erased when the buffers are swapped (when double buffer hardware +// is being used) + +#include +#if HAVE_GL + +#include +#include +#include +#include + +#include "Fl_Gl_Choice.H" + +extern GLXContext fl_first_context; // in Fl_Gl_Choice.C +extern int fl_clip_state_number; // in fl_rect.C + +static GLXContext context; +static int clip_state_number=-1; +static int pw, ph; + +#ifdef WIN32 +static int default_mode; +#endif + +Region XRectangleRegion(int x, int y, int w, int h); // in fl_rect.C + +void gl_start() { +#ifdef WIN32 + HDC hdc = fl_private_dc(Fl_Window::current(), default_mode,0); + if (!context) { + context = wglCreateContext(hdc); + if (!fl_first_context) fl_first_context = context; + else wglShareLists(fl_first_context, context); + } + wglMakeCurrent(hdc, context); +#else + if (!context) { + context = glXCreateContext(fl_display, fl_visual, fl_first_context, 1); + if (!context) Fl::fatal("OpenGL does not support this visual"); + if (!fl_first_context) fl_first_context = context; + } + glXMakeCurrent(fl_display, fl_window, context); + glXWaitX(); +#endif + if (pw != Fl_Window::current()->w() || ph != Fl_Window::current()->h()) { + pw = Fl_Window::current()->w(); + ph = Fl_Window::current()->h(); + glLoadIdentity(); + glViewport(0, 0, pw, ph); + glOrtho(0, pw, 0, ph, -1, 1); + glDrawBuffer(GL_FRONT); + } + if (clip_state_number != fl_clip_state_number) { + clip_state_number = fl_clip_state_number; + int x, y, w, h; + if (fl_clip_box(0, 0, Fl_Window::current()->w(), Fl_Window::current()->h(), + x, y, w, h)) { + fl_clip_region(XRectangleRegion(x,y,w,h)); + glScissor(x, Fl_Window::current()->h()-(y+h), w, h); + glEnable(GL_SCISSOR_TEST); + } else { + glDisable(GL_SCISSOR_TEST); + } + } +} + +void gl_finish() { +#ifdef WIN32 + glFlush(); +#else + glXWaitGL(); +#endif +} + +int Fl::gl_visual(int mode, int *alist) { +#ifdef WIN32 + default_mode = mode; +#else + Fl_Gl_Choice *c = Fl_Gl_Choice::find(mode,alist); + if (!c) return 0; + fl_visual = c->vis; + fl_colormap = c->colormap; +#endif + return 1; +} + +#endif -- cgit v1.2.3