ref: ecc9922f86b8393d1d5b753293074790213b14dc
dir: /src/i_video.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
// DOOM graphics stuff for X11, UNIX.
//
//-----------------------------------------------------------------------------
#include "SDL.h"
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
#include "chocolate_doom_icon.c"
#include "config.h"
#include "deh_main.h"
#include "doomdef.h"
#include "doomstat.h"
#include "d_main.h"
#include "i_scale.h"
#include "i_system.h"
#include "i_swap.h"
#include "i_timer.h"
#include "m_argv.h"
#include "s_sound.h"
#include "sounds.h"
#include "v_video.h"
#include "w_wad.h"
#include "z_zone.h"
// Alternate screenheight for letterbox mode
#define SCREENHEIGHT_4_3 240
enum
{
FULLSCREEN_OFF,
FULLSCREEN_ON,
};
enum
{
RATIO_CORRECT_NONE,
RATIO_CORRECT_LETTERBOX,
RATIO_CORRECT_STRETCH,
};
extern void M_QuitDOOM();
// SDL video driver name
char *video_driver = "";
static SDL_Surface *screen;
// palette
static SDL_Color palette[256];
static boolean palette_to_set;
static int windowwidth, windowheight;
// display has been set up?
static boolean initialised = false;
// disable mouse?
static boolean nomouse = false;
extern int usemouse;
// if true, screens[0] is screen->pixel
static boolean native_surface;
// Automatically adjust video settings if the selected mode is
// not a valid video mode.
int autoadjust_video_settings = 1;
// Run in full screen mode? (int type for config code)
int fullscreen = FULLSCREEN_ON;
// Aspect ratio correction mode
int aspect_ratio_correct = RATIO_CORRECT_NONE;
// Time to wait for the screen to settle on startup before starting the
// game (ms)
int startup_delay = 0;
// Grab the mouse? (int type for config code)
int grabmouse = true;
// Flag indicating whether the screen is currently visible:
// when the screen isnt visible, don't render the screen
boolean screenvisible;
// Blocky mode,
// replace each 320x200 pixel with screenmultiply*screenmultiply pixels.
// According to Dave Taylor, it still is a bonehead thing
// to use ....
int screenmultiply = 1;
// disk image data and background overwritten by the disk to be
// restored by EndRead
static byte *disk_image = NULL;
static int disk_image_w, disk_image_h;
static byte *saved_background;
static boolean window_focused;
// Empty mouse cursor
static SDL_Cursor *cursors[2];
// If true, keyboard mapping is ignored, like in Vanilla Doom.
// The sensible thing to do is to disable this if you have a non-US
// keyboard.
int vanilla_keyboard_mapping = true;
// Mouse acceleration
//
// This emulates some of the behavior of DOS mouse drivers by increasing
// the speed when the mouse is moved fast.
//
// The mouse input values are input directly to the game, but when
// the values exceed the value of mouse_threshold, they are multiplied
// by mouse_acceleration to increase the speed.
float mouse_acceleration = 2.0;
int mouse_threshold = 10;
static boolean MouseShouldBeGrabbed()
{
// never grab the mouse when in screensaver mode
if (screensaver_mode)
return false;
// if the window doesnt have focus, never grab it
if (!window_focused)
return false;
// always grab the mouse when full screen (dont want to
// see the mouse pointer)
if (fullscreen != FULLSCREEN_OFF)
return true;
// if we specify not to grab the mouse, never grab
if (!grabmouse)
return false;
// when menu is active or game is paused, release the mouse
if (menuactive || paused)
return false;
// only grab mouse when playing levels (but not demos)
return (gamestate == GS_LEVEL) && !demoplayback;
}
// Update the value of window_focused when we get a focus event
//
// We try to make ourselves be well-behaved: the grab on the mouse
// is removed if we lose focus (such as a popup window appearing),
// and we dont move the mouse around if we aren't focused either.
static void UpdateFocus(void)
{
Uint8 state;
state = SDL_GetAppState();
// We should have input (keyboard) focus and be visible
// (not minimised)
window_focused = (state & SDL_APPINPUTFOCUS) && (state & SDL_APPACTIVE);
// Should the screen be grabbed?
screenvisible = (state & SDL_APPACTIVE) != 0;
}
static void LoadDiskImage(void)
{
patch_t *disk;
int y;
char buf[20];
SDL_VideoDriverName(buf, 15);
if (!strcmp(buf, "Quartz"))
{
// MacOS Quartz gives us pageflipped graphics that screw up the
// display when we use the loading disk. Disable it.
// This is a gross hack.
return;
}
if (M_CheckParm("-cdrom") > 0)
disk = (patch_t *) W_CacheLumpName(DEH_String("STCDROM"), PU_STATIC);
else
disk = (patch_t *) W_CacheLumpName(DEH_String("STDISK"), PU_STATIC);
V_DrawPatch(0, 0, 0, disk);
disk_image_w = SHORT(disk->width);
disk_image_h = SHORT(disk->height);
disk_image = Z_Malloc(disk_image_w * disk_image_h, PU_STATIC, NULL);
saved_background = Z_Malloc(disk_image_w * disk_image_h, PU_STATIC, NULL);
for (y=0; y<disk_image_h; ++y)
{
memcpy(disk_image + disk_image_w * y,
screens[0] + SCREENWIDTH * y,
disk_image_w);
memset(screens[0] + SCREENWIDTH * y, 0, disk_image_w);
}
Z_Free(disk);
}
//
// Translates the SDL key
//
static int TranslateKey(SDL_keysym *sym)
{
switch(sym->sym)
{
case SDLK_LEFT: return KEY_LEFTARROW;
case SDLK_RIGHT: return KEY_RIGHTARROW;
case SDLK_DOWN: return KEY_DOWNARROW;
case SDLK_UP: return KEY_UPARROW;
case SDLK_ESCAPE: return KEY_ESCAPE;
case SDLK_RETURN: return KEY_ENTER;
case SDLK_TAB: return KEY_TAB;
case SDLK_F1: return KEY_F1;
case SDLK_F2: return KEY_F2;
case SDLK_F3: return KEY_F3;
case SDLK_F4: return KEY_F4;
case SDLK_F5: return KEY_F5;
case SDLK_F6: return KEY_F6;
case SDLK_F7: return KEY_F7;
case SDLK_F8: return KEY_F8;
case SDLK_F9: return KEY_F9;
case SDLK_F10: return KEY_F10;
case SDLK_F11: return KEY_F11;
case SDLK_F12: return KEY_F12;
case SDLK_BACKSPACE: return KEY_BACKSPACE;
case SDLK_DELETE: return KEY_DEL;
case SDLK_PAUSE: return KEY_PAUSE;
case SDLK_EQUALS:
case SDLK_KP_EQUALS: return KEY_EQUALS;
case SDLK_MINUS: return KEY_MINUS;
case SDLK_LSHIFT:
case SDLK_RSHIFT:
return KEY_RSHIFT;
case SDLK_LCTRL:
case SDLK_RCTRL:
return KEY_RCTRL;
case SDLK_LALT:
case SDLK_LMETA:
case SDLK_RALT:
case SDLK_RMETA:
return KEY_RALT;
case SDLK_CAPSLOCK: return KEY_CAPSLOCK;
case SDLK_SCROLLOCK: return KEY_SCRLCK;
case SDLK_KP0: return KEYP_0;
case SDLK_KP1: return KEYP_1;
case SDLK_KP2: return KEYP_2;
case SDLK_KP3: return KEYP_3;
case SDLK_KP4: return KEYP_4;
case SDLK_KP5: return KEYP_5;
case SDLK_KP6: return KEYP_6;
case SDLK_KP7: return KEYP_7;
case SDLK_KP8: return KEYP_8;
case SDLK_KP9: return KEYP_9;
case SDLK_HOME: return KEY_HOME;
case SDLK_INSERT: return KEY_INS;
case SDLK_END: return KEY_END;
case SDLK_PAGEUP: return KEY_PGUP;
case SDLK_PAGEDOWN: return KEY_PGDN;
case SDLK_KP_MULTIPLY: return KEYP_MULTIPLY;
case SDLK_KP_PLUS: return KEYP_PLUS;
case SDLK_KP_MINUS: return KEYP_MINUS;
case SDLK_KP_DIVIDE: return KEYP_DIVIDE;
default:
return tolower(sym->sym);
}
}
void I_ShutdownGraphics(void)
{
if (initialised)
{
SDL_ShowCursor(1);
SDL_WM_GrabInput(SDL_GRAB_OFF);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
initialised = false;
}
}
//
// I_StartFrame
//
void I_StartFrame (void)
{
// er?
}
static int MouseButtonState(void)
{
Uint8 state = SDL_GetMouseState(NULL, NULL);
int result = 0;
// Note: button "0" is left, button "1" is right,
// button "2" is middle for Doom. This is different
// to how SDL sees things.
if (state & SDL_BUTTON(1))
result |= 1;
if (state & SDL_BUTTON(3))
result |= 2;
if (state & SDL_BUTTON(2))
result |= 4;
return result;
}
static int AccelerateMouse(int val)
{
if (val < 0)
return -AccelerateMouse(-val);
if (val > mouse_threshold)
{
return (val - mouse_threshold) * mouse_acceleration + mouse_threshold;
}
else
{
return val;
}
}
void I_GetEvent(void)
{
SDL_Event sdlevent;
event_t event;
// possibly not needed
SDL_PumpEvents();
// put event-grabbing stuff in here
while (SDL_PollEvent(&sdlevent))
{
// ignore mouse events when the window is not focused
if (!window_focused
&& (sdlevent.type == SDL_MOUSEMOTION
|| sdlevent.type == SDL_MOUSEBUTTONDOWN
|| sdlevent.type == SDL_MOUSEBUTTONUP))
{
continue;
}
if (screensaver_mode && sdlevent.type == SDL_QUIT)
{
I_Quit();
}
// process event
switch (sdlevent.type)
{
case SDL_KEYDOWN:
event.type = ev_keydown;
event.data1 = TranslateKey(&sdlevent.key.keysym);
// If Vanilla keyboard mapping enabled, the keyboard
// scan code is used to give the character typed.
// This does not change depending on keyboard layout.
// If you have a German keyboard, pressing 'z' will
// give 'y', for example. It is desirable to be able
// to fix this so that people with non-standard
// keyboard mappings can type properly. If vanilla
// mode is disabled, use the properly translated
// version.
if (vanilla_keyboard_mapping)
{
event.data2 = event.data1;
}
else
{
event.data2 = sdlevent.key.keysym.unicode;
}
D_PostEvent(&event);
break;
case SDL_KEYUP:
event.type = ev_keyup;
event.data1 = TranslateKey(&sdlevent.key.keysym);
D_PostEvent(&event);
break;
/*
case SDL_MOUSEMOTION:
event.type = ev_mouse;
event.data1 = MouseButtonState();
event.data2 = AccelerateMouse(sdlevent.motion.xrel);
event.data3 = -AccelerateMouse(sdlevent.motion.yrel);
D_PostEvent(&event);
break;
*/
case SDL_MOUSEBUTTONDOWN:
if (usemouse && !nomouse)
{
event.type = ev_mouse;
event.data1 = MouseButtonState();
event.data2 = event.data3 = 0;
D_PostEvent(&event);
}
break;
case SDL_MOUSEBUTTONUP:
if (usemouse && !nomouse)
{
event.type = ev_mouse;
event.data1 = MouseButtonState();
event.data2 = event.data3 = 0;
D_PostEvent(&event);
}
break;
case SDL_QUIT:
// bring up the "quit doom?" prompt
S_StartSound(NULL,sfx_swtchn);
M_QuitDOOM(0);
break;
case SDL_ACTIVEEVENT:
// need to update our focus state
UpdateFocus();
break;
default:
break;
}
}
}
// Warp the mouse back to the middle of the screen
static void CenterMouse(void)
{
// Warp the the screen center
SDL_WarpMouse(screen->w / 2, screen->h / 2);
// Clear any relative movement caused by warping
SDL_PumpEvents();
SDL_GetRelativeMouseState(NULL, NULL);
}
//
// Read the change in mouse state to generate mouse motion events
//
// This is to combine all mouse movement for a tic into one mouse
// motion event.
static void I_ReadMouse(void)
{
int x, y;
event_t ev;
SDL_GetRelativeMouseState(&x, &y);
if (x != 0 || y != 0)
{
ev.type = ev_mouse;
ev.data1 = MouseButtonState();
ev.data2 = AccelerateMouse(x);
ev.data3 = -AccelerateMouse(y);
D_PostEvent(&ev);
}
if (MouseShouldBeGrabbed())
{
CenterMouse();
}
}
//
// I_StartTic
//
void I_StartTic (void)
{
I_GetEvent();
if (usemouse && !nomouse)
{
I_ReadMouse();
}
}
//
// I_UpdateNoBlit
//
void I_UpdateNoBlit (void)
{
// what is this?
}
static void UpdateGrab(void)
{
static boolean currently_grabbed = false;
boolean grab;
grab = MouseShouldBeGrabbed();
if (screensaver_mode)
{
// Hide the cursor in screensaver mode
SDL_SetCursor(cursors[0]);
}
else if (grab && !currently_grabbed)
{
SDL_SetCursor(cursors[0]);
SDL_WM_GrabInput(SDL_GRAB_ON);
}
else if (!grab && currently_grabbed)
{
SDL_SetCursor(cursors[1]);
SDL_WM_GrabInput(SDL_GRAB_OFF);
}
currently_grabbed = grab;
}
// Update a small portion of the screen
//
// Does stretching and buffer blitting if neccessary
static void BlitArea(int x1, int y1, int x2, int y2)
{
void (*scale_function)(int x1, int y1, int x2, int y2);
int x_offset, y_offset;
if (native_surface)
{
return;
}
if (aspect_ratio_correct == RATIO_CORRECT_LETTERBOX)
{
x_offset = (screen->w - SCREENWIDTH * screenmultiply) / 2;
y_offset = (screen->h - SCREENHEIGHT * screenmultiply) / 2;
}
else
{
x_offset = 0;
y_offset = 0;
}
if (aspect_ratio_correct == RATIO_CORRECT_STRETCH)
{
if (screenmultiply == 1)
{
scale_function = I_Stretch1x;
}
else if (screenmultiply == 2)
{
scale_function = I_Stretch2x;
}
else if (screenmultiply == 3)
{
scale_function = I_Stretch3x;
}
else if (screenmultiply == 4)
{
scale_function = I_Stretch4x;
}
else
{
I_Error("No aspect ratio stretching function for screenmultiply=%i",
screenmultiply);
return;
}
} else {
if (screenmultiply == 1)
{
scale_function = I_Scale1x;
}
else if (screenmultiply == 2)
{
scale_function = I_Scale2x;
}
else if (screenmultiply == 3)
{
scale_function = I_Scale3x;
}
else if (screenmultiply == 4)
{
scale_function = I_Scale4x;
}
else
{
I_Error("No scale function found!");
return;
}
}
if (SDL_LockSurface(screen) >= 0)
{
I_InitScale(screens[0],
(byte *) screen->pixels + (y_offset * screen->pitch)
+ x_offset,
screen->pitch);
scale_function(x1, y1, x2, y2);
SDL_UnlockSurface(screen);
}
}
static void UpdateRect(int x1, int y1, int x2, int y2)
{
// Do stretching and blitting
BlitArea(x1, y1, x2, y2);
// Update the area
SDL_UpdateRect(screen,
x1 * screenmultiply,
y1 * screenmultiply,
(x2-x1) * screenmultiply,
(y2-y1) * screenmultiply);
}
void I_BeginRead(void)
{
int y;
if (!initialised || disk_image == NULL)
return;
// save background and copy the disk image in
for (y=0; y<disk_image_h; ++y)
{
byte *screenloc =
screens[0]
+ (SCREENHEIGHT - 1 - disk_image_h + y) * SCREENWIDTH
+ (SCREENWIDTH - 1 - disk_image_w);
memcpy(saved_background + y * disk_image_w,
screenloc,
disk_image_w);
memcpy(screenloc, disk_image + y * disk_image_w, disk_image_w);
}
UpdateRect(SCREENWIDTH - disk_image_w, SCREENHEIGHT - disk_image_h,
SCREENWIDTH, SCREENHEIGHT);
}
void I_EndRead(void)
{
int y;
if (!initialised || disk_image == NULL)
return;
// save background and copy the disk image in
for (y=0; y<disk_image_h; ++y)
{
byte *screenloc =
screens[0]
+ (SCREENHEIGHT - 1 - disk_image_h + y) * SCREENWIDTH
+ (SCREENWIDTH - 1 - disk_image_w);
memcpy(screenloc, saved_background + y * disk_image_w, disk_image_w);
}
UpdateRect(SCREENWIDTH - disk_image_w, SCREENHEIGHT - disk_image_h,
SCREENWIDTH, SCREENHEIGHT);
}
//
// I_FinishUpdate
//
void I_FinishUpdate (void)
{
static int lasttic;
int tics;
int i;
// UNUSED static unsigned char *bigscreen=0;
if (!initialised)
return;
if (noblit)
return;
UpdateGrab();
// Don't update the screen if the window isn't visible.
// Not doing this breaks under Windows when we alt-tab away
// while fullscreen.
if (!(SDL_GetAppState() & SDL_APPACTIVE))
return;
// draws little dots on the bottom of the screen
if (devparm)
{
i = I_GetTime();
tics = i - lasttic;
lasttic = i;
if (tics > 20) tics = 20;
for (i=0 ; i<tics*2 ; i+=4)
screens[0][ (SCREENHEIGHT-1)*SCREENWIDTH + i] = 0xff;
for ( ; i<20*4 ; i+=4)
screens[0][ (SCREENHEIGHT-1)*SCREENWIDTH + i] = 0x0;
}
// draw to screen
BlitArea(0, 0, SCREENWIDTH, SCREENHEIGHT);
// If we have a palette to set, the act of setting the palette
// updates the screen
if (palette_to_set)
{
SDL_SetColors(screen, palette, 0, 256);
palette_to_set = 0;
}
else
{
SDL_Flip(screen);
}
}
//
// I_ReadScreen
//
void I_ReadScreen (byte* scr)
{
memcpy (scr, screens[0], SCREENWIDTH*SCREENHEIGHT);
}
//
// I_SetPalette
//
void I_SetPalette (byte *doompalette)
{
int i;
for (i=0; i<256; ++i)
{
palette[i].r = gammatable[usegamma][*doompalette++];
palette[i].g = gammatable[usegamma][*doompalette++];
palette[i].b = gammatable[usegamma][*doompalette++];
}
palette_to_set = 1;
}
//
// Set the window caption
//
void I_SetWindowCaption(void)
{
char *buf;
buf = Z_Malloc(strlen(gamedescription) + strlen(PACKAGE_STRING) + 10,
PU_STATIC, NULL);
sprintf(buf, "%s - %s", gamedescription, PACKAGE_STRING);
SDL_WM_SetCaption(buf, NULL);
Z_Free(buf);
}
// Set the application icon
void I_SetWindowIcon(void)
{
SDL_Surface *surface;
surface = SDL_CreateRGBSurfaceFrom(chocolate_doom_data,
chocolate_doom_w,
chocolate_doom_h,
24,
chocolate_doom_w * 3,
0xff << 0,
0xff << 8,
0xff << 16,
0);
SDL_WM_SetIcon(surface, NULL);
SDL_FreeSurface(surface);
}
// Get window dimensions for the current settings
static void GetWindowDimensions(int *windowwidth, int *windowheight)
{
*windowwidth = SCREENWIDTH * screenmultiply;
if (aspect_ratio_correct == RATIO_CORRECT_NONE)
*windowheight = SCREENHEIGHT * screenmultiply;
else
*windowheight = SCREENHEIGHT_4_3 * screenmultiply;
}
// Check if the screen mode for the current settings is in the list available
// Not all machines support running in 320x200/640x400 (only support 4:3)
// Some don't even support modes below 640x480.
static boolean CheckValidFSMode(void)
{
SDL_Rect **modes;
int i;
int w, h;
GetWindowDimensions(&w, &h);
modes = SDL_ListModes(NULL, SDL_FULLSCREEN);
for (i=0; modes[i]; ++i)
{
if (w == modes[i]->w && h == modes[i]->h)
return true;
}
// not found
return false;
}
static void CheckCommandLine(void)
{
//!
// @category video
//
// Grab the mouse when running in windowed mode.
//
if (M_CheckParm("-grabmouse"))
{
grabmouse = true;
}
//!
// @category video
//
// Don't grab the mouse when running in windowed mode.
//
if (M_CheckParm("-nograbmouse"))
{
grabmouse = false;
}
// default to fullscreen mode, allow override with command line
// nofullscreen because we love prboom
//!
// @category video
//
// Run in a window.
//
if (M_CheckParm("-window") || M_CheckParm("-nofullscreen"))
{
fullscreen = FULLSCREEN_OFF;
}
//!
// @category video
//
// Run in fullscreen mode.
//
if (M_CheckParm("-fullscreen"))
{
fullscreen = FULLSCREEN_ON;
}
//!
// @category video
//
// Disable the mouse.
//
nomouse = M_CheckParm("-nomouse") > 0;
// 2x, 3x, 4x scale mode
//!
// @category video
//
// Don't scale up the screen.
//
if (M_CheckParm("-1"))
{
screenmultiply = 1;
}
//!
// @category video
//
// Double up the screen to 2x its size.
//
if (M_CheckParm("-2"))
{
screenmultiply = 2;
}
//!
// @category video
//
// Double up the screen to 3x its size.
//
if (M_CheckParm("-3"))
{
screenmultiply = 3;
}
//!
// @category video
//
// Double up the screen to 4x its size.
//
if (M_CheckParm("-4"))
{
screenmultiply = 4;
}
if (screenmultiply < 1)
screenmultiply = 1;
if (screenmultiply > 4)
screenmultiply = 4;
}
static void AutoAdjustSettings(void)
{
int oldw, oldh;
int old_ratio, old_screenmultiply;
GetWindowDimensions(&oldw, &oldh);
old_screenmultiply = screenmultiply;
old_ratio = aspect_ratio_correct;
if (!CheckValidFSMode() && screenmultiply == 1
&& fullscreen == FULLSCREEN_ON
&& aspect_ratio_correct == RATIO_CORRECT_NONE)
{
// 320x200 is not valid.
// Try turning on letterbox mode - avoid doubling up
// the screen if possible
aspect_ratio_correct = RATIO_CORRECT_LETTERBOX;
if (!CheckValidFSMode())
{
// That doesn't work. Change it back.
aspect_ratio_correct = RATIO_CORRECT_NONE;
}
}
if (!CheckValidFSMode() && screenmultiply == 1)
{
// Try doubling up the screen to 640x400
screenmultiply = 2;
}
if (!CheckValidFSMode()
&& fullscreen == FULLSCREEN_ON
&& aspect_ratio_correct == RATIO_CORRECT_NONE)
{
// This is not a valid mode. Try turning on letterbox mode
aspect_ratio_correct = RATIO_CORRECT_LETTERBOX;
}
if (old_ratio != aspect_ratio_correct
|| old_screenmultiply != screenmultiply)
{
printf("I_InitGraphics: %ix%i resolution is not supported "
"on this machine. \n", oldw, oldh);
printf("I_InitGraphics: Video settings adjusted to "
"compensate:\n");
if (old_ratio != aspect_ratio_correct)
printf("\tletterbox mode on (aspect_ratio_correct=%i)\n",
aspect_ratio_correct);
if (screenmultiply != old_screenmultiply)
printf("\tscreenmultiply=%i\n", screenmultiply);
printf("NOTE: Your video settings have been adjusted. "
"To disable this behavior,\n"
"set autoadjust_video_settings to 0 in your "
"configuration file.\n");
}
if (!CheckValidFSMode())
{
printf("I_InitGraphics: WARNING: Unable to find a valid "
"fullscreen video mode to run in.\n");
}
}
// Check if we have been invoked as a screensaver by xscreensaver.
void I_CheckIsScreensaver(void)
{
char *env;
env = getenv("XSCREENSAVER_WINDOW");
if (env != NULL)
{
screensaver_mode = true;
}
}
// In screensaver mode, pick a screenmultiply value that fits
// inside the screen. It is okay to do this because settings
// are not saved in screensaver mode.
static void FindScreensaverMultiply(void)
{
int i;
for (i=1; i<=4; ++i)
{
if (SCREENWIDTH * i <= screen->w
&& SCREENHEIGHT * i <= screen->h)
{
screenmultiply = i;
}
}
}
static void CreateCursors(void)
{
static Uint8 empty_cursor_data = 0;
// Save the default cursor so it can be recalled later
cursors[1] = SDL_GetCursor();
// Create an empty cursor
cursors[0] = SDL_CreateCursor(&empty_cursor_data,
&empty_cursor_data,
1, 1, 0, 0);
}
static void SetSDLVideoDriver(void)
{
// Allow a default value for the SDL video driver to be specified
// in the configuration file.
if (strcmp(video_driver, "") != 0)
{
char *env_string;
env_string = malloc(strlen(video_driver) + 30);
sprintf(env_string, "SDL_VIDEODRIVER=%s", video_driver);
putenv(env_string);
free(env_string);
}
#ifdef _WIN32
// Allow -gdi as a shortcut for using the windib driver.
//!
// @category video
// @platform windows
//
// Use the Windows GDI driver instead of DirectX.
//
if (M_CheckParm("-gdi") > 0)
{
putenv("SDL_VIDEODRIVER=windib");
}
// From the SDL 1.2.10 release notes:
//
// > The "windib" video driver is the default now, to prevent
// > problems with certain laptops, 64-bit Windows, and Windows
// > Vista.
//
// The hell with that.
if (getenv("SDL_VIDEODRIVER") == NULL)
{
putenv("SDL_VIDEODRIVER=directx");
}
#endif
}
void I_InitGraphics(void)
{
SDL_Event dummy;
byte *doompal;
int flags = 0;
char *env;
// Pass through the XSCREENSAVER_WINDOW environment variable to
// SDL_WINDOWID, to embed the SDL window into the Xscreensaver
// window.
env = getenv("XSCREENSAVER_WINDOW");
if (env != NULL)
{
char winenv[30];
int winid;
sscanf(env, "0x%x", &winid);
sprintf(winenv, "SDL_WINDOWID=%i", winid);
putenv(winenv);
}
SetSDLVideoDriver();
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
I_Error("Failed to initialise video: %s", SDL_GetError());
}
// Check for command-line video-related parameters.
CheckCommandLine();
// Don't allow letterbox mode when windowed
if (!fullscreen && aspect_ratio_correct == RATIO_CORRECT_LETTERBOX)
{
aspect_ratio_correct = RATIO_CORRECT_NONE;
}
if (fullscreen && autoadjust_video_settings)
{
// Check that the fullscreen mode we are trying to use is valid;
// if not, try to automatically select a more appropriate one.
AutoAdjustSettings();
}
// Generate lookup tables before setting the video mode.
doompal = W_CacheLumpName (DEH_String("PLAYPAL"),PU_CACHE);
if (aspect_ratio_correct == RATIO_CORRECT_STRETCH)
{
I_InitStretchTables(doompal);
}
// Set the video mode.
GetWindowDimensions(&windowwidth, &windowheight);
flags |= SDL_SWSURFACE | SDL_HWPALETTE | SDL_DOUBLEBUF;
if (fullscreen != FULLSCREEN_OFF)
{
flags |= SDL_FULLSCREEN;
}
if (screensaver_mode)
{
windowwidth = 0;
windowheight = 0;
}
screen = SDL_SetVideoMode(windowwidth, windowheight, 8, flags);
if (screen == NULL)
{
I_Error("Error setting video mode: %s\n", SDL_GetError());
}
// In screensaver mode, screenmultiply as large as possible
// and set a blank cursor.
if (screensaver_mode)
{
FindScreensaverMultiply();
}
// Start with a clear black screen
// (screen will be flipped after we set the palette)
if (SDL_LockSurface(screen) >= 0)
{
byte *screenpixels;
int y;
screenpixels = (byte *) screen->pixels;
for (y=0; y<screen->h; ++y)
memset(screenpixels + screen->pitch * y, 0, screen->w);
SDL_UnlockSurface(screen);
}
// Set the palette
I_SetPalette(doompal);
SDL_SetColors(screen, palette, 0, 256);
// Setup title and icon
I_SetWindowCaption();
I_SetWindowIcon();
CreateCursors();
UpdateFocus();
UpdateGrab();
// On some systems, it takes a second or so for the screen to settle
// after changing modes. We include the option to add a delay when
// setting the screen mode, so that the game doesn't start immediately
// with the player unable to see anything.
if (fullscreen && !screensaver_mode)
{
SDL_Delay(startup_delay);
}
// Check if we have a native surface we can use
// If we have to lock the screen, draw to a buffer and copy
// Likewise if the screen pitch is not the same as the width
// If we have to multiply, drawing is done to a separate 320x200 buf
native_surface = !SDL_MUSTLOCK(screen)
&& screenmultiply == 1
&& screen->pitch == SCREENWIDTH
&& (aspect_ratio_correct == RATIO_CORRECT_NONE
|| aspect_ratio_correct == RATIO_CORRECT_LETTERBOX);
// If not, allocate a buffer and copy from that buffer to the
// screen when we do an update
if (native_surface)
{
screens[0] = (unsigned char *) (screen->pixels);
if (aspect_ratio_correct == RATIO_CORRECT_LETTERBOX)
{
screens[0] += ((SCREENHEIGHT_4_3 - SCREENHEIGHT) * screen->pitch) / 2;
}
}
else
{
screens[0] = (unsigned char *) Z_Malloc (SCREENWIDTH * SCREENHEIGHT, PU_STATIC, NULL);
}
// "Loading from disk" icon
LoadDiskImage();
// Clear the screen to black.
memset(screens[0], 0, SCREENWIDTH * SCREENHEIGHT);
// We need SDL to give us translated versions of keys as well
SDL_EnableUNICODE(1);
// Repeat key presses - this is what Vanilla Doom does
// Not sure about repeat rate - probably dependent on which DOS
// driver is used. This is good enough though.
SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
// clear out any events waiting at the start and center the mouse
while (SDL_PollEvent(&dummy));
CenterMouse();
initialised = true;
}