| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| 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" |
| |
| /* SVGAlib based SDL video driver implementation. |
| */ |
| |
| #include <unistd.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <fcntl.h> |
| |
| #if defined(__LINUX__) |
| #include <linux/vt.h> |
| #elif defined(__FREEBSD__) |
| #include <sys/consio.h> |
| #else |
| #error You must choose your operating system here |
| #endif |
| #include <vga.h> |
| #include <vgamouse.h> |
| #include <vgakeyboard.h> |
| |
| #include "SDL_video.h" |
| #include "SDL_mouse.h" |
| #include "../SDL_sysvideo.h" |
| #include "../SDL_pixels_c.h" |
| #include "../../events/SDL_events_c.h" |
| #include "SDL_svgavideo.h" |
| #include "SDL_svgaevents_c.h" |
| #include "SDL_svgamouse_c.h" |
| |
| /* Initialization/Query functions */ |
| static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
| static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
| static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| static int SVGA_SetColors(_THIS, int firstcolor, int ncolors, |
| SDL_Color *colors); |
| static void SVGA_VideoQuit(_THIS); |
| |
| /* Hardware surface functions */ |
| static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface); |
| static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface); |
| static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface); |
| static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
| static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface); |
| |
| /* SVGAlib driver bootstrap functions */ |
| |
| static int SVGA_Available(void) |
| { |
| /* Check to see if we are root and stdin is a virtual console */ |
| int console; |
| |
| /* SVGALib 1.9.x+ doesn't require root (via /dev/svga) */ |
| int svgalib2 = -1; |
| |
| /* See if we are connected to a virtual terminal */ |
| console = STDIN_FILENO; |
| #if 0 /* This is no longer needed, SVGAlib can switch consoles for us */ |
| if ( console >= 0 ) { |
| struct stat sb; |
| struct vt_mode dummy; |
| |
| if ( (fstat(console, &sb) < 0) || |
| (ioctl(console, VT_GETMODE, &dummy) < 0) ) { |
| console = -1; |
| } |
| } |
| #endif /* 0 */ |
| |
| /* See if SVGAlib 2.0 is available */ |
| svgalib2 = open("/dev/svga", O_RDONLY); |
| if (svgalib2 != -1) { |
| close(svgalib2); |
| } |
| |
| return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
| } |
| |
| static void SVGA_DeleteDevice(SDL_VideoDevice *device) |
| { |
| SDL_free(device->hidden); |
| SDL_free(device); |
| } |
| |
| static SDL_VideoDevice *SVGA_CreateDevice(int devindex) |
| { |
| SDL_VideoDevice *device; |
| |
| /* Initialize all variables that we clean on shutdown */ |
| device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| if ( device ) { |
| SDL_memset(device, 0, (sizeof *device)); |
| device->hidden = (struct SDL_PrivateVideoData *) |
| SDL_malloc((sizeof *device->hidden)); |
| } |
| if ( (device == NULL) || (device->hidden == NULL) ) { |
| SDL_OutOfMemory(); |
| if ( device ) { |
| SDL_free(device); |
| } |
| return(0); |
| } |
| SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| |
| /* Set the function pointers */ |
| device->VideoInit = SVGA_VideoInit; |
| device->ListModes = SVGA_ListModes; |
| device->SetVideoMode = SVGA_SetVideoMode; |
| device->SetColors = SVGA_SetColors; |
| device->UpdateRects = NULL; |
| device->VideoQuit = SVGA_VideoQuit; |
| device->AllocHWSurface = SVGA_AllocHWSurface; |
| device->CheckHWBlit = NULL; |
| device->FillHWRect = NULL; |
| device->SetHWColorKey = NULL; |
| device->SetHWAlpha = NULL; |
| device->LockHWSurface = SVGA_LockHWSurface; |
| device->UnlockHWSurface = SVGA_UnlockHWSurface; |
| device->FlipHWSurface = SVGA_FlipHWSurface; |
| device->FreeHWSurface = SVGA_FreeHWSurface; |
| device->SetCaption = NULL; |
| device->SetIcon = NULL; |
| device->IconifyWindow = NULL; |
| device->GrabInput = NULL; |
| device->GetWMInfo = NULL; |
| device->InitOSKeymap = SVGA_InitOSKeymap; |
| device->PumpEvents = SVGA_PumpEvents; |
| |
| device->free = SVGA_DeleteDevice; |
| |
| return device; |
| } |
| |
| VideoBootStrap SVGALIB_bootstrap = { |
| "svgalib", "SVGAlib", |
| SVGA_Available, SVGA_CreateDevice |
| }; |
| |
| static int SVGA_AddMode(_THIS, int mode, int actually_add) |
| { |
| int i, j; |
| vga_modeinfo *modeinfo; |
| |
| modeinfo = vga_getmodeinfo(mode); |
| |
| i = modeinfo->bytesperpixel-1; |
| if ( i < 0 ) { |
| return 0; |
| } |
| if ( actually_add ) { |
| SDL_Rect saved_rect[2]; |
| int saved_mode[2]; |
| int b; |
| |
| /* Add the mode, sorted largest to smallest */ |
| b = 0; |
| j = 0; |
| while ( (SDL_modelist[i][j]->w > modeinfo->width) || |
| (SDL_modelist[i][j]->h > modeinfo->height) ) { |
| ++j; |
| } |
| /* Skip modes that are already in our list */ |
| if ( (SDL_modelist[i][j]->w == modeinfo->width) && |
| (SDL_modelist[i][j]->h == modeinfo->height) ) { |
| return(0); |
| } |
| /* Insert the new mode */ |
| saved_rect[b] = *SDL_modelist[i][j]; |
| saved_mode[b] = SDL_vgamode[i][j]; |
| SDL_modelist[i][j]->w = modeinfo->width; |
| SDL_modelist[i][j]->h = modeinfo->height; |
| SDL_vgamode[i][j] = mode; |
| /* Everybody scoot down! */ |
| if ( saved_rect[b].w && saved_rect[b].h ) { |
| for ( ++j; SDL_modelist[i][j]->w; ++j ) { |
| saved_rect[!b] = *SDL_modelist[i][j]; |
| saved_mode[!b] = SDL_vgamode[i][j]; |
| *SDL_modelist[i][j] = saved_rect[b]; |
| SDL_vgamode[i][j] = saved_mode[b]; |
| b = !b; |
| } |
| *SDL_modelist[i][j] = saved_rect[b]; |
| SDL_vgamode[i][j] = saved_mode[b]; |
| } |
| } else { |
| ++SDL_nummodes[i]; |
| } |
| return(1); |
| } |
| |
| static void SVGA_UpdateVideoInfo(_THIS) |
| { |
| vga_modeinfo *modeinfo; |
| |
| this->info.wm_available = 0; |
| this->info.hw_available = (banked ? 0 : 1); |
| modeinfo = vga_getmodeinfo(vga_getcurrentmode()); |
| this->info.video_mem = modeinfo->memory; |
| /* FIXME: Add hardware accelerated blit information */ |
| #ifdef SVGALIB_DEBUG |
| printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); |
| #endif |
| } |
| |
| int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
| { |
| int keyboard; |
| int i, j; |
| int mode, total_modes; |
| |
| /* Initialize all variables that we clean on shutdown */ |
| for ( i=0; i<NUM_MODELISTS; ++i ) { |
| SDL_nummodes[i] = 0; |
| SDL_modelist[i] = NULL; |
| SDL_vgamode[i] = NULL; |
| } |
| |
| /* Initialize the library */ |
| vga_disabledriverreport(); |
| if ( vga_init() < 0 ) { |
| SDL_SetError("Unable to initialize SVGAlib"); |
| return(-1); |
| } |
| vga_setmode(TEXT); |
| |
| /* Enable mouse and keyboard support */ |
| vga_setmousesupport(1); |
| keyboard = keyboard_init_return_fd(); |
| if ( keyboard < 0 ) { |
| SDL_SetError("Unable to initialize keyboard"); |
| return(-1); |
| } |
| if ( SVGA_initkeymaps(keyboard) < 0 ) { |
| return(-1); |
| } |
| keyboard_seteventhandler(SVGA_keyboardcallback); |
| |
| /* Determine the current screen size */ |
| this->info.current_w = 0; |
| this->info.current_h = 0; |
| |
| /* Determine the screen depth (use default 8-bit depth) */ |
| vformat->BitsPerPixel = 8; |
| |
| /* Enumerate the available fullscreen modes */ |
| total_modes = 0; |
| for ( mode=vga_lastmodenumber(); mode; --mode ) { |
| if ( vga_hasmode(mode) ) { |
| if ( SVGA_AddMode(this, mode, 0) ) { |
| ++total_modes; |
| } |
| } |
| } |
| if ( SVGA_AddMode(this, G320x200x256, 0) ) ++total_modes; |
| if ( total_modes == 0 ) { |
| SDL_SetError("No linear video modes available"); |
| return(-1); |
| } |
| for ( i=0; i<NUM_MODELISTS; ++i ) { |
| SDL_vgamode[i] = (int *)SDL_malloc(SDL_nummodes[i]*sizeof(int)); |
| if ( SDL_vgamode[i] == NULL ) { |
| SDL_OutOfMemory(); |
| return(-1); |
| } |
| SDL_modelist[i] = (SDL_Rect **) |
| SDL_malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); |
| if ( SDL_modelist[i] == NULL ) { |
| SDL_OutOfMemory(); |
| return(-1); |
| } |
| for ( j=0; j<SDL_nummodes[i]; ++j ) { |
| SDL_modelist[i][j]=(SDL_Rect *)SDL_malloc(sizeof(SDL_Rect)); |
| if ( SDL_modelist[i][j] == NULL ) { |
| SDL_OutOfMemory(); |
| return(-1); |
| } |
| SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); |
| } |
| SDL_modelist[i][j] = NULL; |
| } |
| for ( mode=vga_lastmodenumber(); mode; --mode ) { |
| if ( vga_hasmode(mode) ) { |
| SVGA_AddMode(this, mode, 1); |
| } |
| } |
| SVGA_AddMode(this, G320x200x256, 1); |
| |
| /* Free extra (duplicated) modes */ |
| for ( i=0; i<NUM_MODELISTS; ++i ) { |
| j = 0; |
| while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { |
| j++; |
| } |
| while ( SDL_modelist[i][j] ) { |
| SDL_free(SDL_modelist[i][j]); |
| SDL_modelist[i][j] = NULL; |
| j++; |
| } |
| } |
| |
| /* Fill in our hardware acceleration capabilities */ |
| SVGA_UpdateVideoInfo(this); |
| |
| /* We're done! */ |
| return(0); |
| } |
| |
| SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
| { |
| return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
| } |
| |
| /* Various screen update functions available */ |
| static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
| static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); |
| |
| SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, |
| int width, int height, int bpp, Uint32 flags) |
| { |
| int mode; |
| int vgamode; |
| vga_modeinfo *modeinfo; |
| int screenpage_len; |
| |
| /* Free old pixels if we were in banked mode */ |
| if ( banked && current->pixels ) { |
| free(current->pixels); |
| current->pixels = NULL; |
| } |
| |
| /* Try to set the requested linear video mode */ |
| bpp = (bpp+7)/8-1; |
| for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) { |
| if ( (SDL_modelist[bpp][mode]->w == width) && |
| (SDL_modelist[bpp][mode]->h == height) ) { |
| break; |
| } |
| } |
| if ( SDL_modelist[bpp][mode] == NULL ) { |
| SDL_SetError("Couldn't find requested mode in list"); |
| return(NULL); |
| } |
| vgamode = SDL_vgamode[bpp][mode]; |
| vga_setmode(vgamode); |
| vga_setpage(0); |
| |
| if ( (vga_setlinearaddressing() < 0) && (vgamode != G320x200x256) ) { |
| banked = 1; |
| } else { |
| banked = 0; |
| } |
| |
| modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]); |
| |
| /* Update hardware acceleration info */ |
| SVGA_UpdateVideoInfo(this); |
| |
| /* Allocate the new pixel format for the screen */ |
| bpp = (bpp+1)*8; |
| if ( (bpp == 16) && (modeinfo->colors == 32768) ) { |
| bpp = 15; |
| } |
| if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) { |
| return(NULL); |
| } |
| |
| /* Set up the new mode framebuffer */ |
| current->flags = SDL_FULLSCREEN; |
| if ( !banked ) { |
| current->flags |= SDL_HWSURFACE; |
| } |
| if ( bpp == 8 ) { |
| /* FIXME: What about DirectColor? */ |
| current->flags |= SDL_HWPALETTE; |
| } |
| current->w = width; |
| current->h = height; |
| current->pitch = modeinfo->linewidth; |
| if ( banked ) { |
| current->pixels = SDL_malloc(current->h * current->pitch); |
| if ( !current->pixels ) { |
| SDL_OutOfMemory(); |
| return(NULL); |
| } |
| } else { |
| current->pixels = vga_getgraphmem(); |
| } |
| |
| /* set double-buffering */ |
| if ( (flags & SDL_DOUBLEBUF) && !banked ) |
| { |
| /* length of one screen page in bytes */ |
| screenpage_len=current->h*modeinfo->linewidth; |
| |
| /* if start address should be aligned */ |
| if ( modeinfo->linewidth_unit ) |
| { |
| if ( screenpage_len % modeinfo->linewidth_unit ) |
| { |
| screenpage_len += modeinfo->linewidth_unit - ( screenpage_len % modeinfo->linewidth_unit ); |
| } |
| } |
| |
| /* if we heve enough videomemory = ak je dost videopamete */ |
| if ( modeinfo->memory > ( screenpage_len * 2 / 1024 ) ) |
| { |
| current->flags |= SDL_DOUBLEBUF; |
| flip_page = 0; |
| flip_offset[0] = 0; |
| flip_offset[1] = screenpage_len; |
| flip_address[0] = vga_getgraphmem(); |
| flip_address[1] = flip_address[0]+screenpage_len; |
| SVGA_FlipHWSurface(this,current); |
| } |
| } |
| |
| /* Set the blit function */ |
| if ( banked ) { |
| this->UpdateRects = SVGA_BankedUpdate; |
| } else { |
| this->UpdateRects = SVGA_DirectUpdate; |
| } |
| |
| /* Set up the mouse handler again (buggy SVGAlib 1.40) */ |
| mouse_seteventhandler(SVGA_mousecallback); |
| |
| /* We're done */ |
| return(current); |
| } |
| |
| /* We don't actually allow hardware surfaces other than the main one */ |
| static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) |
| { |
| return(-1); |
| } |
| static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) |
| { |
| return; |
| } |
| |
| /* We need to wait for vertical retrace on page flipped displays */ |
| static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) |
| { |
| /* The waiting is done in SVGA_FlipHWSurface() */ |
| return(0); |
| } |
| static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
| { |
| return; |
| } |
| |
| static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) |
| { |
| if ( !banked ) { |
| vga_setdisplaystart(flip_offset[flip_page]); |
| flip_page=!flip_page; |
| surface->pixels=flip_address[flip_page]; |
| vga_waitretrace(); |
| } |
| return(0); |
| } |
| |
| static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
| { |
| return; |
| } |
| |
| static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) |
| { |
| int i, j; |
| SDL_Rect *rect; |
| int page, vp; |
| int x, y, w, h; |
| unsigned char *src; |
| unsigned char *dst; |
| int bpp = this->screen->format->BytesPerPixel; |
| int pitch = this->screen->pitch; |
| |
| dst = vga_getgraphmem(); |
| for ( i=0; i < numrects; ++i ) { |
| rect = &rects[i]; |
| x = rect->x; |
| y = rect->y; |
| w = rect->w * bpp; |
| h = rect->h; |
| |
| vp = y * pitch + x * bpp; |
| src = (unsigned char *)this->screen->pixels + vp; |
| page = vp >> 16; |
| vp &= 0xffff; |
| vga_setpage(page); |
| for (j = 0; j < h; j++) { |
| if (vp + w > 0x10000) { |
| if (vp >= 0x10000) { |
| page++; |
| vga_setpage(page); |
| vp &= 0xffff; |
| } else { |
| SDL_memcpy(dst + vp, src, 0x10000 - vp); |
| page++; |
| vga_setpage(page); |
| SDL_memcpy(dst, src + 0x10000 - vp, |
| (vp + w) & 0xffff); |
| vp = (vp + pitch) & 0xffff; |
| src += pitch; |
| continue; |
| } |
| } |
| SDL_memcpy(dst + vp, src, w); |
| src += pitch; |
| vp += pitch; |
| } |
| } |
| } |
| |
| int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
| { |
| int i; |
| |
| for(i = 0; i < ncolors; i++) { |
| vga_setpalette(firstcolor + i, |
| colors[i].r>>2, |
| colors[i].g>>2, |
| colors[i].b>>2); |
| } |
| return(1); |
| } |
| |
| /* Note: If we are terminated, this could be called in the middle of |
| another SDL video routine -- notably UpdateRects. |
| */ |
| void SVGA_VideoQuit(_THIS) |
| { |
| int i, j; |
| |
| /* Reset the console video mode */ |
| if ( this->screen && (this->screen->w && this->screen->h) ) { |
| vga_setmode(TEXT); |
| } |
| keyboard_close(); |
| |
| /* Free video mode lists */ |
| for ( i=0; i<NUM_MODELISTS; ++i ) { |
| if ( SDL_modelist[i] != NULL ) { |
| for ( j=0; SDL_modelist[i][j]; ++j ) |
| SDL_free(SDL_modelist[i][j]); |
| SDL_free(SDL_modelist[i]); |
| SDL_modelist[i] = NULL; |
| } |
| if ( SDL_vgamode[i] != NULL ) { |
| SDL_free(SDL_vgamode[i]); |
| SDL_vgamode[i] = NULL; |
| } |
| } |
| if ( this->screen ) { |
| if ( banked && this->screen->pixels ) { |
| SDL_free(this->screen->pixels); |
| } |
| this->screen->pixels = NULL; |
| } |
| } |
| |