GLSurface gglCreateSurface(GLDisplay dp,::Window hwin,GLFormat fp)
{
GGLDisplay* display = (GGLDisplay*)dp;
GGLFormat* format = (GGLFormat*)fp;
GGLSurface* surface = 0;
if (!_hasGLXExtension(display,GLX_VERSION_1_3)) {
// Return our own GGL surface rep.
surface = new GGLSurface;
surface->type = GGLSurface::Window;
surface->display = display;
surface->drawable = 0;
surface->window = hwin;
}
else {
// Get config info from format ID
GLXFBConfig config;
if (!_getFBConfig(display,format->pformat,config))
return 0;
// Create GLX window
GLXWindow window = glXCreateWindow(display->display,config,hwin,0);
if (!window) {
GLenum error = glGetError();
static LogCategory log("/Gfx/Device/GL");
log.print(format("Create window error: %d",error));
return 0;
}
// Return our own GGL surface rep.
surface = new GGLSurface;
surface->type = GGLSurface::Window;
surface->display = display;
surface->drawable = window;
surface->window = 0;
}
return surface;
}
GLFormat gglSelectFormat(GLDisplay dp,GLFormatInfo& mode)
{
GGLDisplay* display = (GGLDisplay*)dp;
U32 pformat;
if (!_hasGLXExtension(display,GLX_VERSION_1_3)) {
// Find GL compatible X visual using 1.2 interface.
// 1.2 or earlier does not include pbuffer support.
if (mode.target != GLFormatInfo::Window)
return 0;
int attributes[] = {
GLX_RGBA,
GLX_RED_SIZE, mode.red,
GLX_BLUE_SIZE, mode.blue,
GLX_GREEN_SIZE, mode.green,
GLX_DEPTH_SIZE, mode.z,
GLX_ALPHA_SIZE, mode.alpha,
GLX_STENCIL_SIZE, mode.stencil,
GLX_DOUBLEBUFFER, true,
GLX_DOUBLEBUFFER,
None
};
XVisualInfo* visual = glXChooseVisual(display->display, display->screen, attributes);
if (!visual) {
static LogCategory log("/Gfx/Device/GL");
log.print("GGLContext: Could not get an accelerated visual");
return 0;
}
pformat = visual->visualid;
XFree(visual);
}
else {
// Find GL compatible X visual using 1.3 interface.
int attributes[] = {
GLX_DRAWABLE_TYPE, (mode.target == GLFormatInfo::Buffer)?
GLX_PBUFFER_BIT: GLX_WINDOW_BIT,
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_RED_SIZE, mode.red,
GLX_BLUE_SIZE, mode.blue,
GLX_GREEN_SIZE, mode.green,
GLX_DEPTH_SIZE, mode.z,
GLX_ALPHA_SIZE, mode.alpha,
GLX_STENCIL_SIZE, mode.stencil,
GLX_DOUBLEBUFFER, true,
None
};
int count = 0;
GLXFBConfig* configList = glXChooseFBConfig(display->display,
display->screen,attributes,&count);
if (!count)
return 0;
// Return the config ID
int xid;
glXGetFBConfigAttrib(display->display,configList[0],GLX_FBCONFIG_ID,&xid);
XFree(configList);
pformat = xid;
}
if (pformat) {
GGLFormat* format = new GGLFormat;
format->pformat = pformat;
format->mode = mode;
return format;
}
return 0;
}
