quakeforge/libs/video/targets/vid_x11.c

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/*
vid_x11.c
General X11 video driver
Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 1999-2000 contributors of the QuakeForge project
Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
Copyright (C) 1999,2000 contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#define _BSD
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <ctype.h>
#include <dlfcn.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <sys/types.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <X11/extensions/XShm.h>
#ifdef HAVE_VIDMODE
# include <X11/extensions/xf86vmode.h>
#endif
#include "QF/cmd.h"
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/qargs.h"
#include "QF/qendian.h"
#include "QF/screen.h"
#include "QF/sys.h"
#include "QF/va.h"
#include "compat.h"
#include "context_x11.h"
#include "d_iface.h"
#include "dga_check.h"
#include "vid_internal.h"
int XShmGetEventBase (Display *x); // for broken X11 headers
static GC x_gc;
static qboolean doShm;
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static XShmSegmentInfo x_shminfo[2];
static int current_framebuffer;
static XImage *x_framebuffer[2] = { 0, 0 };
int VID_options_items = 1;
static byte current_palette[768];
typedef unsigned char PIXEL8;
typedef unsigned short PIXEL16;
typedef unsigned int PIXEL24;
static PIXEL16 st2d_8to16table[256];
static PIXEL24 st2d_8to24table[256];
static int shiftmask_fl = 0;
static long r_shift, g_shift, b_shift;
static unsigned long r_mask, g_mask, b_mask;
#define GLX_RGBA 4 // true if RGBA mode
#define GLX_DOUBLEBUFFER 5 // double buffering supported
#define GLX_RED_SIZE 8 // number of red component bits
#define GLX_GREEN_SIZE 9 // number of green component bits
#define GLX_BLUE_SIZE 10 // number of blue component bits
#define GLX_DEPTH_SIZE 12 // number of depth bits
// GLXContext is a pointer to opaque data
typedef struct __GLXcontextRec *GLXContext;
typedef XID GLXDrawable;
// Define GLAPIENTRY to a useful value
#ifndef GLAPIENTRY
# ifdef _WIN32
# include <windows.h>
# define GLAPIENTRY WINAPI
# undef LoadImage
# else
# ifdef APIENTRY
# define GLAPIENTRY APIENTRY
# else
# define GLAPIENTRY
# endif
# endif
#endif
static GLXContext ctx = NULL;
static void *libgl_handle;
static void (*qfglXSwapBuffers) (Display *dpy, GLXDrawable drawable);
static XVisualInfo* (*qfglXChooseVisual) (Display *dpy, int screen,
int *attribList);
static GLXContext (*qfglXCreateContext) (Display *dpy, XVisualInfo *vis,
GLXContext shareList, Bool direct);
static Bool (*qfglXMakeCurrent) (Display *dpy, GLXDrawable drawable,
GLXContext ctx);
static void (GLAPIENTRY *qfglFinish) (void);
static void *(*glGetProcAddress) (const char *symbol) = NULL;
static int use_gl_procaddress = 0;
static cvar_t *gl_driver;
static void (*choose_visual) (void);
static void (*create_context) (void);
static void *
QFGL_GetProcAddress (void *handle, const char *name)
{
void *glfunc = NULL;
if (use_gl_procaddress && glGetProcAddress)
glfunc = glGetProcAddress (name);
if (!glfunc)
glfunc = dlsym (handle, name);
return glfunc;
}
static void *
QFGL_ProcAddress (const char *name, qboolean crit)
{
void *glfunc = NULL;
Sys_MaskPrintf (SYS_VID, "DEBUG: Finding symbol %s ... ", name);
glfunc = QFGL_GetProcAddress (libgl_handle, name);
if (glfunc) {
Sys_MaskPrintf (SYS_VID, "found [%p]\n", glfunc);
return glfunc;
}
Sys_MaskPrintf (SYS_VID, "not found\n");
if (crit) {
if (strncmp ("fxMesa", name, 6) == 0) {
Sys_Printf ("This target requires a special version of Mesa with "
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"support for Glide and SVGAlib.\n");
Sys_Printf ("If you are in X, try using a GLX or SGL target.\n");
}
Sys_Error ("Couldn't load critical OpenGL function %s, exiting...",
name);
}
return NULL;
}
static void
glx_choose_visual (void)
{
int attrib[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
GLX_DEPTH_SIZE, 1,
None
};
x_visinfo = qfglXChooseVisual (x_disp, x_screen, attrib);
if (!x_visinfo) {
Sys_Error ("Error couldn't get an RGB, Double-buffered, Depth visual");
}
x_vis = x_visinfo->visual;
}
static void
glx_create_context (void)
{
XSync (x_disp, 0);
ctx = qfglXCreateContext (x_disp, x_visinfo, NULL, True);
qfglXMakeCurrent (x_disp, x_win, ctx);
viddef.init_gl ();
}
static void
glx_end_rendering (void)
{
qfglFinish ();
qfglXSwapBuffers (x_disp, x_win);
}
static void
glx_load_gl (void)
{
int flags = RTLD_NOW;
choose_visual = glx_choose_visual;
create_context = glx_create_context;
viddef.get_proc_address = QFGL_ProcAddress;
viddef.end_rendering = glx_end_rendering;
#ifdef RTLD_GLOBAL
flags |= RTLD_GLOBAL;
#endif
if (!(libgl_handle = dlopen (gl_driver->string, flags))) {
Sys_Error ("Couldn't load OpenGL library %s: %s", gl_driver->string,
dlerror ());
}
glGetProcAddress = dlsym (libgl_handle, "glXGetProcAddress");
if (!glGetProcAddress)
glGetProcAddress = dlsym (libgl_handle, "glXGetProcAddressARB");
qfglXSwapBuffers = QFGL_ProcAddress ("glXSwapBuffers", true);
qfglXChooseVisual = QFGL_ProcAddress ("glXChooseVisual", true);
qfglXCreateContext = QFGL_ProcAddress ("glXCreateContext", true);
qfglXMakeCurrent = QFGL_ProcAddress ("glXMakeCurrent", true);
use_gl_procaddress = 1;
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qfglFinish = QFGL_ProcAddress ("glFinish", true);
}
static void
shiftmask_init (void)
{
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unsigned long long x;
r_mask = x_vis->red_mask;
g_mask = x_vis->green_mask;
b_mask = x_vis->blue_mask;
for (r_shift = -8, x = 1; x < r_mask; x <<= 1)
r_shift++;
for (g_shift = -8, x = 1; x < g_mask; x <<= 1)
g_shift++;
for (b_shift = -8, x = 1; x < b_mask; x <<= 1)
b_shift++;
shiftmask_fl = 1;
}
static PIXEL16
xlib_rgb16 (int r, int g, int b)
{
PIXEL16 p = 0;
if (!shiftmask_fl)
shiftmask_init ();
if (r_shift > 0) {
p = (r << (r_shift)) & r_mask;
} else {
if (r_shift < 0) {
p = (r >> (-r_shift)) & r_mask;
} else {
p |= (r & r_mask);
}
}
if (g_shift > 0) {
p |= (g << (g_shift)) & g_mask;
} else {
if (g_shift < 0) {
p |= (g >> (-g_shift)) & g_mask;
} else {
p |= (g & g_mask);
}
}
if (b_shift > 0) {
p |= (b << (b_shift)) & b_mask;
} else {
if (b_shift < 0) {
p |= (b >> (-b_shift)) & b_mask;
} else {
p |= (b & b_mask);
}
}
return p;
}
static PIXEL24
xlib_rgb24 (int r, int g, int b)
{
PIXEL24 p = 0;
if (!shiftmask_fl)
shiftmask_init ();
if (r_shift > 0) {
p = (r << (r_shift)) & r_mask;
} else {
if (r_shift < 0) {
p = (r >> (-r_shift)) & r_mask;
} else {
p |= (r & r_mask);
}
}
if (g_shift > 0) {
p |= (g << (g_shift)) & g_mask;
} else {
if (g_shift < 0) {
p |= (g >> (-g_shift)) & g_mask;
} else {
p |= (g & g_mask);
}
}
if (b_shift > 0) {
p |= (b << (b_shift)) & b_mask;
} else {
if (b_shift < 0) {
p |= (b >> (-b_shift)) & b_mask;
} else {
p |= (b & b_mask);
}
}
return p;
}
static void
st2_fixup (XImage *framebuf, int x, int y, int width, int height)
{
int xi, yi;
unsigned char *src;
PIXEL16 *dest;
if (x < 0 || y < 0)
return;
for (yi = y; yi < (y + height); yi++) {
src = &((byte *)viddef.buffer)[yi * viddef.width];
dest = (PIXEL16 *) &framebuf->data[yi * framebuf->bytes_per_line];
for (xi = x; xi < x + width; xi++) {
dest[xi] = st2d_8to16table[src[xi]];
}
}
}
static void
st3_fixup (XImage * framebuf, int x, int y, int width, int height)
{
int yi;
unsigned char *src;
PIXEL24 *dest;
register int count, n;
if (x < 0 || y < 0)
return;
for (yi = y; yi < (y + height); yi++) {
src = &((byte *)viddef.buffer)[yi * viddef.width + x];
dest = (PIXEL24 *) &framebuf->data[yi * framebuf->bytes_per_line + x];
// Duff's Device
count = width;
n = (count + 7) / 8;
switch (count % 8) {
case 0:
do {
*dest++ = st2d_8to24table[*src++];
case 7:
*dest++ = st2d_8to24table[*src++];
case 6:
*dest++ = st2d_8to24table[*src++];
case 5:
*dest++ = st2d_8to24table[*src++];
case 4:
*dest++ = st2d_8to24table[*src++];
case 3:
*dest++ = st2d_8to24table[*src++];
case 2:
*dest++ = st2d_8to24table[*src++];
case 1:
*dest++ = st2d_8to24table[*src++];
} while (--n > 0);
}
}
}
void
D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
// direct drawing of the "accessing disk" icon isn't supported
}
void
D_EndDirectRect (int x, int y, int width, int height)
{
// direct drawing of the "accessing disk" icon isn't supported
}
static void
ResetFrameBuffer (void)
{
int mem, pwidth;
char *buf;
if (x_framebuffer[0]) {
XDestroyImage (x_framebuffer[0]);
}
pwidth = x_visinfo->depth / 8;
if (pwidth == 3)
pwidth = 4;
mem = ((viddef.width * pwidth + 7) & ~7) * viddef.height;
buf = malloc (mem);
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SYS_CHECKMEM (buf);
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// allocate new screen buffer
x_framebuffer[0] = XCreateImage (x_disp, x_vis, x_visinfo->depth,
ZPixmap, 0, buf, viddef.width,
viddef.height, 32, 0);
if (!x_framebuffer[0]) {
Sys_Error ("VID: XCreateImage failed");
}
}
static void
ResetSharedFrameBuffers (void)
{
int size;
int key;
int minsize = getpagesize ();
int frm;
for (frm = 0; frm < 2; frm++) {
// free up old frame buffer memory
if (x_framebuffer[frm]) {
XShmDetach (x_disp, &x_shminfo[frm]);
free (x_framebuffer[frm]);
shmdt (x_shminfo[frm].shmaddr);
}
// create the image
x_framebuffer[frm] = XShmCreateImage (x_disp, x_vis, x_visinfo->depth,
ZPixmap, 0, &x_shminfo[frm],
viddef.width, viddef.height);
// grab shared memory
size = x_framebuffer[frm]->bytes_per_line * x_framebuffer[frm]->height;
if (size < minsize)
Sys_Error ("VID: Window must use at least %d bytes", minsize);
key = random ();
x_shminfo[frm].shmid = shmget ((key_t) key, size, IPC_CREAT | 0777);
if (x_shminfo[frm].shmid == -1)
Sys_Error ("VID: Could not get any shared memory (%s)",
strerror (errno));
// attach to the shared memory segment
x_shminfo[frm].shmaddr = (void *) shmat (x_shminfo[frm].shmid, 0, 0);
Sys_MaskPrintf (SYS_VID, "VID: shared memory id=%d, addr=0x%lx\n",
x_shminfo[frm].shmid, (long) x_shminfo[frm].shmaddr);
x_framebuffer[frm]->data = x_shminfo[frm].shmaddr;
// get the X server to attach to it
if (!XShmAttach (x_disp, &x_shminfo[frm]))
Sys_Error ("VID: XShmAttach() failed");
XSync (x_disp, 0);
shmctl (x_shminfo[frm].shmid, IPC_RMID, 0);
}
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}
static void
x11_init_buffers (void)
{
if (doShm)
ResetSharedFrameBuffers ();
else
ResetFrameBuffer ();
current_framebuffer = 0;
viddef.direct = 0;
viddef.rowbytes = viddef.width;
if (x_visinfo->depth != 8) {
if (viddef.buffer)
free (viddef.buffer);
viddef.buffer = calloc (viddef.width, viddef.height);
if (!viddef.buffer)
Sys_Error ("Not enough memory for video mode");
} else {
viddef.buffer = x_framebuffer[current_framebuffer]->data;
}
viddef.conbuffer = viddef.buffer;
viddef.conrowbytes = viddef.rowbytes;
}
static void
x11_choose_visual (void)
{
int pnum, i;
XVisualInfo template;
int num_visuals;
int template_mask;
template_mask = 0;
// specify a visual id
if ((pnum = COM_CheckParm ("-visualid"))) {
if (pnum >= com_argc - 1)
Sys_Error ("VID: -visualid <id#>");
template.visualid = atoi (com_argv[pnum + 1]);
template_mask = VisualIDMask;
} else { // If not specified, use default
// visual
template.visualid =
XVisualIDFromVisual (XDefaultVisual (x_disp, x_screen));
template_mask = VisualIDMask;
}
// pick a visual -- warn if more than one was available
x_visinfo = XGetVisualInfo (x_disp, template_mask, &template,
&num_visuals);
if (x_visinfo->depth == 8 && x_visinfo->class == PseudoColor)
x_cmap = XCreateColormap (x_disp, x_win, x_vis, AllocAll);
x_vis = x_visinfo->visual;
if (num_visuals > 1) {
Sys_MaskPrintf (SYS_VID,
"Found more than one visual id at depth %d:\n",
template.depth);
for (i = 0; i < num_visuals; i++)
Sys_MaskPrintf (SYS_VID, " -visualid %d\n",
(int) x_visinfo[i].visualid);
} else {
if (num_visuals == 0) {
if (template_mask == VisualIDMask) {
Sys_Error ("VID: Bad visual ID %ld", template.visualid);
} else {
Sys_Error ("VID: No visuals at depth %d", template.depth);
}
}
}
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Sys_MaskPrintf (SYS_VID, "Using visualid %d:\n",
(int) x_visinfo->visualid);
Sys_MaskPrintf (SYS_VID, " class %d\n", x_visinfo->class);
Sys_MaskPrintf (SYS_VID, " screen %d\n", x_visinfo->screen);
Sys_MaskPrintf (SYS_VID, " depth %d\n", x_visinfo->depth);
Sys_MaskPrintf (SYS_VID, " red_mask 0x%x\n",
(int) x_visinfo->red_mask);
Sys_MaskPrintf (SYS_VID, " green_mask 0x%x\n",
(int) x_visinfo->green_mask);
Sys_MaskPrintf (SYS_VID, " blue_mask 0x%x\n",
(int) x_visinfo->blue_mask);
Sys_MaskPrintf (SYS_VID, " colormap_size %d\n",
x_visinfo->colormap_size);
Sys_MaskPrintf (SYS_VID, " bits_per_rgb %d\n",
x_visinfo->bits_per_rgb);
}
static void
x11_create_context (void)
{
// create the GC
{
XGCValues xgcvalues;
int valuemask = GCGraphicsExposures;
xgcvalues.graphics_exposures = False;
x_gc = XCreateGC (x_disp, x_win, valuemask, &xgcvalues);
}
// even if MITSHM is available, make sure it's a local connection
if (XShmQueryExtension (x_disp)) {
char *displayname;
char *d;
doShm = true;
if ((displayname = XDisplayName (NULL))) {
if ((d = strchr (displayname, ':')))
*d = '\0';
if (!(!strcasecmp (displayname, "unix") || !*displayname))
doShm = false;
}
}
if (doShm) {
x_shmeventtype = XShmGetEventBase (x_disp) + ShmCompletion;
}
viddef.do_screen_buffer = x11_init_buffers;
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VID_InitBuffers ();
// XSynchronize (x_disp, False);
// X11_AddEvent (x_shmeventtype, event_shm);
}
static void
VID_SetPalette (const byte *palette)
{
int i;
XColor colors[256];
for (i = 0; i < 256; i++) {
st2d_8to16table[i] = xlib_rgb16 (palette[i * 3], palette[i * 3 + 1],
palette[i * 3 + 2]);
st2d_8to24table[i] = xlib_rgb24 (palette[i * 3], palette[i * 3 + 1],
palette[i * 3 + 2]);
}
if (x_visinfo->class == PseudoColor && x_visinfo->depth == 8) {
if (palette != current_palette) {
memcpy (current_palette, palette, 768);
}
for (i = 0; i < 256; i++) {
colors[i].pixel = i;
colors[i].flags = DoRed | DoGreen | DoBlue;
colors[i].red = palette[(i * 3)] << 8;
colors[i].green = palette[(i * 3) + 1] << 8;
colors[i].blue = palette[(i * 3) + 2] << 8;
}
XStoreColors (x_disp, x_cmap, colors, 256);
}
}
/*
Set up color translation tables and the window. Takes a 256-color 8-bit
palette. Palette data will go away after the call, so copy it if you'll
need it later.
*/
void
VID_Init (byte *palette, byte *colormap)
{
choose_visual = x11_choose_visual;
create_context = x11_create_context;
viddef.load_gl = glx_load_gl;
viddef.set_palette = VID_SetPalette;
R_LoadModule ();
viddef.numpages = 2;
viddef.colormap8 = colormap;
viddef.fullbright = 256 - viddef.colormap8[256 * VID_GRADES];
srandom (getpid ());
VID_GetWindowSize (320, 200);
X11_OpenDisplay ();
choose_visual ();
X11_SetVidMode (viddef.width, viddef.height);
X11_CreateWindow (viddef.width, viddef.height);
X11_CreateNullCursor (); // hide mouse pointer
create_context ();
VID_InitGamma (palette);
viddef.set_palette (viddef.palette);
Sys_MaskPrintf (SYS_VID, "Video mode %dx%d initialized.\n",
viddef.width, viddef.height);
viddef.initialized = true;
viddef.recalc_refdef = 1; // force a surface cache flush
}
void
VID_Init_Cvars ()
{
X11_Init_Cvars ();
gl_driver = Cvar_Get ("gl_driver", GL_DRIVER, CVAR_ROM, NULL,
"The OpenGL library to use. (path optional)");
}
/*
VID_Shutdown
Restore video mode
*/
void
VID_Shutdown (void)
{
Sys_MaskPrintf (SYS_VID, "VID_Shutdown\n");
X11_CloseDisplay ();
}
static int config_notify = 0;
static int config_notify_width;
static int config_notify_height;
/*
VID_Update
Flush the given rectangles from the view buffer to the screen.
*/
void
VID_Update (vrect_t *rects)
{
/* If the window changes dimension, skip this frame. */
if (config_notify) {
fprintf (stderr, "config notify\n");
config_notify = 0;
viddef.width = config_notify_width & ~7;
viddef.height = config_notify_height;
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VID_InitBuffers ();
viddef.recalc_refdef = 1; /* force a surface cache flush */
Con_CheckResize ();
return;
}
while (rects) {
switch (x_visinfo->depth) {
case 16:
st2_fixup (x_framebuffer[current_framebuffer],
rects->x, rects->y, rects->width, rects->height);
break;
case 24:
st3_fixup (x_framebuffer[current_framebuffer],
rects->x, rects->y, rects->width, rects->height);
break;
}
if (doShm) {
if (!XShmPutImage (x_disp, x_win, x_gc,
x_framebuffer[current_framebuffer],
rects->x, rects->y, rects->x, rects->y,
rects->width, rects->height, True)) {
Sys_Error ("VID_Update: XShmPutImage failed");
}
oktodraw = false;
while (!oktodraw)
X11_ProcessEvent ();
rects = rects->next;
current_framebuffer = !current_framebuffer;
} else {
if (XPutImage (x_disp, x_win, x_gc, x_framebuffer[0],
rects->x, rects->y, rects->x, rects->y,
rects->width, rects->height)) {
Sys_Error ("VID_Update: XPutImage failed");
}
rects = rects->next;
}
}
XSync (x_disp, False);
r_data->scr_fullupdate = 0;
}
void
VID_LockBuffer (void)
{
}
void
VID_UnlockBuffer (void)
{
}
void
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VID_SetCaption (const char *text)
{
if (text && *text) {
char *temp = strdup (text);
X11_SetCaption (va ("%s: %s", PACKAGE_STRING, temp));
free (temp);
} else {
X11_SetCaption (va ("%s", PACKAGE_STRING));
}
}
qboolean
VID_SetGamma (double gamma)
{
return X11_SetGamma (gamma);
}