diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/video/svga/SDL_svgavideo.c')
| -rw-r--r-- | distrib/sdl-1.2.15/src/video/svga/SDL_svgavideo.c | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/video/svga/SDL_svgavideo.c b/distrib/sdl-1.2.15/src/video/svga/SDL_svgavideo.c new file mode 100644 index 0000000..58ea800 --- /dev/null +++ b/distrib/sdl-1.2.15/src/video/svga/SDL_svgavideo.c @@ -0,0 +1,584 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 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; + } +} + |