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SDL_x11modes.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_x11video.h"
static int
get_visualinfo(Display * display, int screen, XVisualInfo * vinfo)
{
const char *visual_id = SDL_getenv("SDL_VIDEO_X11_VISUALID");
int use_directcolor = 1;
int depth;
/* Look for an exact visual, if requested */
if (visual_id) {
XVisualInfo *vi, template;
int nvis;
SDL_zero(template);
template.visualid = SDL_strtol(visual_id, NULL, 0);
vi = XGetVisualInfo(display, VisualIDMask, &template, &nvis);
if (vi) {
*vinfo = *vi;
XFree(vi);
return 0;
}
}
depth = DefaultDepth(display, screen);
if ((use_directcolor &&
XMatchVisualInfo(display, screen, depth, DirectColor, vinfo)) ||
XMatchVisualInfo(display, screen, depth, TrueColor, vinfo) ||
XMatchVisualInfo(display, screen, depth, PseudoColor, vinfo) ||
XMatchVisualInfo(display, screen, depth, StaticColor, vinfo)) {
return 0;
}
return -1;
}
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static Uint32
X11_GetPixelFormatFromVisualInfo(Display *display, XVisualInfo *vinfo)
{
if (vinfo->class == DirectColor || vinfo->class == TrueColor) {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
Rmask = vinfo->visual->red_mask;
Gmask = vinfo->visual->green_mask;
Bmask = vinfo->visual->blue_mask;
if (vinfo->depth == 32) {
Amask = (0xFFFFFFFF & ~(Rmask | Gmask | Bmask));
} else {
Amask = 0;
}
bpp = vinfo->depth;
if (bpp == 24) {
int i, n;
XPixmapFormatValues *p = XListPixmapFormats(display, &n);
if (p) {
for (i = 0; i < n; ++i) {
if (p[i].depth == 24) {
bpp = p[i].bits_per_pixel;
break;
}
}
XFree(p);
}
}
return SDL_MasksToPixelFormatEnum(bpp, Rmask, Gmask, Bmask, Amask);
}
if (vinfo->class == PseudoColor || vinfo->class == StaticColor) {
switch (vinfo->depth) {
case 8:
return SDL_PIXELTYPE_INDEX8;
case 4:
if (BitmapBitOrder(display) == LSBFirst) {
return SDL_PIXELFORMAT_INDEX4LSB;
} else {
return SDL_PIXELFORMAT_INDEX4MSB;
}
break;
case 1:
if (BitmapBitOrder(display) == LSBFirst) {
return SDL_PIXELFORMAT_INDEX1LSB;
} else {
return SDL_PIXELFORMAT_INDEX1MSB;
}
break;
}
}
return SDL_PIXELFORMAT_UNKNOWN;
}
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void
X11_InitModes(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
int screen;
for (screen = 0; screen < ScreenCount(data->display); ++screen) {
XVisualInfo vinfo;
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
if (get_visualinfo(data->display, screen, &vinfo) < 0) {
continue;
}
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mode.format = X11_GetPixelFormatFromVisualInfo(data->display, &vinfo);
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mode.w = DisplayWidth(data->display, screen);
mode.h = DisplayHeight(data->display, screen);
mode.refresh_rate = 0;
mode.driverdata = NULL;
displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
if (!displaydata) {
continue;
}
displaydata->screen = screen;
displaydata->visual = vinfo.visual;
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displaydata->depth = vinfo.depth;
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SDL_zero(display);
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = displaydata;
SDL_AddVideoDisplay(&display);
}
}
void
X11_GetDisplayModes(_THIS)
{
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Display *display = ((SDL_VideoData *) _this->driverdata)->display;
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SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
SDL_DisplayMode mode;
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}
int
X11_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
{
//SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
return -1;
}
void
X11_QuitModes(_THIS)
{
}
/* vi: set ts=4 sw=4 expandtab: */