bool gl_initialize(int screen_wid,int screen_high,int fsaa_mode,char *err_str)
{
int sdl_flags;
GLint ntxtsize;
#if defined(D3_OS_LINUX) || defined(D3_OS_WINDOWS)
GLenum glew_error;
#endif
#ifdef D3_OS_IPHONE
const GLenum discards[]={GL_DEPTH_ATTACHMENT,GL_STENCIL_ATTACHMENT};
#endif
// reset sizes to the desktop
// if they are at default
if ((screen_wid==-1) || (screen_high==-1)) {
screen_wid=render_info.desktop.wid;
screen_high=render_info.desktop.high;
}
// setup rendering sizes
#ifndef D3_ROTATE_VIEW
view.screen.x_sz=screen_wid;
view.screen.y_sz=screen_high;
#else
view.screen.x_sz=screen_high;
view.screen.y_sz=screen_wid;
#endif
view.screen.wide=gl_is_size_widescreen(view.screen.x_sz,view.screen.y_sz);
// normal attributes
SDL_GL_SetAttribute(SDL_GL_RED_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
#ifdef D3_OPENGL_ES
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION,2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION,0);
#endif
#ifdef D3_OS_IPHONE
SDL_GL_SetAttribute(SDL_GL_RETAINED_BACKING,1);
#endif
// full screen anti-aliasing attributes
switch (fsaa_mode) {
case fsaa_mode_2x:
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS,1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,2);
break;
case fsaa_mode_4x:
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS,1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,4);
break;
case fsaa_mode_8x:
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS,1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,8);
break;
}
// start window or full screen
sdl_flags=SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN;
if (!gl_in_window_mode()) sdl_flags|=(SDL_WINDOW_FULLSCREEN|SDL_WINDOW_BORDERLESS);
sdl_wind=SDL_CreateWindow("dim3",SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,screen_wid,screen_high,sdl_flags);
if (sdl_wind==NULL) {
sprintf(err_str,"SDL: Could not create window (Error: %s)",SDL_GetError());
return(FALSE);
}
sdl_gl_ctx=SDL_GL_CreateContext(sdl_wind);
// use glew on linux and windows
#if defined(D3_OS_LINUX) || defined(D3_OS_WINDOWS)
glew_error=glewInit();
if (glew_error!=GL_NO_ERROR) {
strcpy(err_str,glewGetErrorString(glew_error));
return(FALSE);
}
#endif
// grab openGL attributes
strncpy(render_info.name,(char*)glGetString(GL_RENDERER),64);
render_info.name[63]=0x0;
strncpy(render_info.ext_string,(char*)glGetString(GL_EXTENSIONS),8192);
render_info.ext_string[8191]=0x0;
glGetIntegerv(GL_MAX_TEXTURE_SIZE,&ntxtsize);
render_info.texture_max_size=(int)ntxtsize;
if (!gl_check_initialize(err_str)) return(FALSE);
// stick refresh rate to 60
render_info.monitor_refresh_rate=60;
#ifndef D3_ROTATE_VIEW
gl_set_viewport(0,0,view.screen.x_sz,view.screen.y_sz);
#else
gl_set_viewport(0,0,view.screen.y_sz,view.screen.x_sz);
#endif
gl_setup_context();
#ifndef D3_OPENGL_ES
if (fsaa_mode!=fsaa_mode_none) glEnable(GL_MULTISAMPLE);
#endif
// clear the entire window so it doesn't flash
glClearColor(0.0f,0.0f,0.0f,0.0f);
glClear(GL_COLOR_BUFFER_BIT);
#ifdef D3_OS_IPHONE
glDiscardFramebufferEXT(GL_FRAMEBUFFER,2,discards);
#endif
SDL_GL_SwapWindow(sdl_wind);
// texture utility initialize
gl_texture_initialize();
return(TRUE);
}
bool gl_initialize(int screen_wid,int screen_high,bool lock_fps_refresh,int fsaa_mode,bool reset,char *err_str)
{
GLint ntxtunit,ntxtsize;
#ifdef D3_OS_MAC
long swapint,rect[4];
CGLContextObj current_ctx;
CFDictionaryRef mode_info;
CFNumberRef cf_rate;
#else
GLenum glew_error;
#endif
// setup rendering sizes
setup.screen.x_sz=screen_wid;
setup.screen.y_sz=screen_high;
// normal attributes
SDL_GL_SetAttribute(SDL_GL_RED_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,16);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,8);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
// full screen anti-aliasing attributes
switch (fsaa_mode) {
case fsaa_mode_low:
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS,1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,2);
break;
case fsaa_mode_medium:
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS,1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,4);
break;
case fsaa_mode_high:
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS,1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,6);
break;
}
// start window or full screen
if (gl_in_window_mode()) {
surface=SDL_SetVideoMode(setup.screen.x_sz,setup.screen.y_sz,32,SDL_OPENGL|SDL_HWSURFACE);
SDL_WM_SetCaption("dim3",NULL);
}
else {
surface=SDL_SetVideoMode(setup.screen.x_sz,setup.screen.y_sz,32,SDL_OPENGL|SDL_FULLSCREEN);
}
if (surface==NULL) {
sprintf(err_str,"SDL: Could not set video mode (Error: %s)",SDL_GetError());
return(FALSE);
}
// work around the dock losing minimize buttons because
// of SDL luncancy
#ifdef D3_OS_MAC
if (!gl_in_window_mode()) SetSystemUIMode(kUIModeContentSuppressed,0);
#endif
// use glew on linux and windows
#ifndef D3_OS_MAC
glew_error=glewInit();
if (glew_error!=GL_NO_ERROR) {
strcpy(err_str,glewGetErrorString(glew_error));
return(FALSE);
}
#endif
// grab openGL attributes
strncpy(render_info.name,(char*)glGetString(GL_RENDERER),64);
render_info.name[63]=0x0;
strncpy(render_info.ext_string,(char*)glGetString(GL_EXTENSIONS),8192);
render_info.ext_string[8191]=0x0;
glGetIntegerv(GL_MAX_TEXTURE_UNITS,&ntxtunit);
render_info.texture_unit_count=(int)ntxtunit;
glGetIntegerv(GL_MAX_TEXTURE_SIZE,&ntxtsize);
render_info.texture_max_size=(int)ntxtsize;
// in case screen is bigger than desired drawing surface
render_info.monitor_x_sz=surface->w;
render_info.monitor_y_sz=surface->h;
render_info.view_x=(render_info.monitor_x_sz-setup.screen.x_sz)>>1;
render_info.view_y=(render_info.monitor_y_sz-setup.screen.y_sz)>>1;
// determine the referesh rate
render_info.monitor_refresh_rate=60; // windows XP has a stuck refresh rate of 60
#ifdef D3_OS_MAC
mode_info=CGDisplayCurrentMode(CGMainDisplayID());
if (mode_info!=NULL) {
cf_rate=(CFNumberRef)CFDictionaryGetValue(mode_info,kCGDisplayRefreshRate);
if (cf_rate) {
CFNumberGetValue(cf_rate,kCFNumberIntType,&render_info.monitor_refresh_rate);
if (render_info.monitor_refresh_rate==0) render_info.monitor_refresh_rate=60;
}
}
#endif
// clear the entire window so it doesn't flash
glClearColor(0,0,0,0);
glClear(GL_COLOR_BUFFER_BIT);
SDL_GL_SwapBuffers();
// setup renderer
#ifdef D3_OS_MAC
current_ctx=CGLGetCurrentContext();
rect[0]=render_info.view_x;
rect[1]=render_info.view_y;
rect[2]=setup.screen.x_sz;
rect[3]=setup.screen.y_sz;
CGLSetParameter(current_ctx,kCGLCPSwapRectangle,rect);
CGLEnable(current_ctx,kCGLCESwapRectangle);
if (lock_fps_refresh) {
swapint=1;
CGLSetParameter(current_ctx,kCGLCPSwapInterval,&swapint);
}
#endif
glViewport(render_info.view_x,render_info.view_y,setup.screen.x_sz,setup.screen.y_sz);
// perspective correction
glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);
// smoothing and anti-aliasing
glDisable(GL_DITHER);
glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT,GL_NICEST);
if (fsaa_mode!=fsaa_mode_none) glEnable(GL_MULTISAMPLE);
// texture compression
glHint(GL_TEXTURE_COMPRESSION_HINT,GL_NICEST);
glHint(GL_GENERATE_MIPMAP_HINT,GL_NICEST);
// all alphas by 8 bit component
glDisable(GL_ALPHA_TEST);
// texture utility initialize
gl_texture_initialize();
// do an initial draw
if (!reset) {
glClearColor(0,0,0,0);
glClear(GL_COLOR_BUFFER_BIT);
SDL_GL_SwapBuffers();
}
return(TRUE);
}
