SDL_svgavideo.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:14k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_svgavideo.c,v 1.4 2002/04/22 21:38:05 wmay Exp $";
- #endif
- /* SVGAlib based SDL video driver implementation.
- */
- #include <stdlib.h>
- #include <stdio.h>
- #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.h"
- #include "SDL_error.h"
- #include "SDL_video.h"
- #include "SDL_mouse.h"
- #include "SDL_sysvideo.h"
- #include "SDL_pixels_c.h"
- #include "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)
- {
- free(device->hidden);
- free(device);
- }
- static SDL_VideoDevice *SVGA_CreateDevice(int devindex)
- {
- SDL_VideoDevice *device;
- /* Initialize all variables that we clean on shutdown */
- device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
- if ( device ) {
- memset(device, 0, (sizeof *device));
- device->hidden = (struct SDL_PrivateVideoData *)
- malloc((sizeof *device->hidden));
- }
- if ( (device == NULL) || (device->hidden == NULL) ) {
- SDL_OutOfMemory();
- if ( device ) {
- free(device);
- }
- return(0);
- }
- 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 force)
- {
- vga_modeinfo *modeinfo;
- modeinfo = vga_getmodeinfo(mode);
- if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) {
- int i, j;
- i = modeinfo->bytesperpixel-1;
- 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( force || ( modeinfo->flags & CAPABLE_LINEAR ) );
- }
- static void SVGA_UpdateVideoInfo(_THIS)
- {
- vga_modeinfo *modeinfo;
- this->info.wm_available = 0;
- this->info.hw_available = 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: %savailablen", 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 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, 0) ) {
- ++total_modes;
- }
- }
- }
- if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++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 *)malloc(SDL_nummodes[i]*sizeof(int));
- if ( SDL_vgamode[i] == NULL ) {
- SDL_OutOfMemory();
- return(-1);
- }
- SDL_modelist[i] = (SDL_Rect **)
- 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 *)malloc(sizeof(SDL_Rect));
- if ( SDL_modelist[i][j] == NULL ) {
- SDL_OutOfMemory();
- return(-1);
- }
- 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, 0);
- }
- }
- SVGA_AddMode(this, G320x200x256, 1, 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] ) {
- 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;
- /* 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);
- }
- vga_setmode(SDL_vgamode[bpp][mode]);
- vga_setpage(0);
- vgamode=SDL_vgamode[bpp][mode];
- if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) {
- SDL_SetError("Unable to set linear addressing");
- return(NULL);
- }
- 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|SDL_HWSURFACE);
- if ( bpp == 8 ) {
- /* FIXME: What about DirectColor? */
- current->flags |= SDL_HWPALETTE;
- }
- current->w = width;
- current->h = height;
- current->pitch = modeinfo->linewidth;
- current->pixels = vga_getgraphmem();
- /* set double-buffering */
- if ( flags & SDL_DOUBLEBUF )
- {
- /* 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 */
- 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)
- {
- 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;
- }
- /* FIXME: Can this be used under SVGAlib? */
- static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects)
- {
- return;
- }
- 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 )
- free(SDL_modelist[i][j]);
- free(SDL_modelist[i]);
- SDL_modelist[i] = NULL;
- }
- if ( SDL_vgamode[i] != NULL ) {
- free(SDL_vgamode[i]);
- SDL_vgamode[i] = NULL;
- }
- }
- if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) {
- /* Direct screen access, no memory buffer */
- this->screen->pixels = NULL;
- }
- }