| /* |
| 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" |
| |
| /* DGA 2.0 based SDL video driver implementation. |
| */ |
| |
| #include <stdio.h> |
| |
| #include <X11/Xlib.h> |
| #include "../Xext/extensions/xf86dga.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_dgavideo.h" |
| #include "SDL_dgamouse_c.h" |
| #include "SDL_dgaevents_c.h" |
| |
| /* get function pointers... */ |
| #include "../x11/SDL_x11dyn.h" |
| |
| /*#define DGA_DEBUG*/ |
| |
| /* Initialization/Query functions */ |
| static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
| static SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
| static SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| static int DGA_SetColors(_THIS, int firstcolor, int ncolors, |
| SDL_Color *colors); |
| static int DGA_SetGammaRamp(_THIS, Uint16 *ramp); |
| static void DGA_VideoQuit(_THIS); |
| |
| /* Hardware surface functions */ |
| static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size); |
| static void DGA_FreeHWSurfaces(_THIS); |
| static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface); |
| static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color); |
| static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst); |
| static int DGA_LockHWSurface(_THIS, SDL_Surface *surface); |
| static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
| static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface); |
| static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface); |
| |
| /* DGA driver bootstrap functions */ |
| |
| static int DGA_Available(void) |
| { |
| const char *display = NULL; |
| Display *dpy = NULL; |
| int available = 0; |
| |
| /* The driver is available is available if the display is local |
| and the DGA 2.0+ extension is available, and we can map mem. |
| */ |
| if ( SDL_X11_LoadSymbols() ) { |
| if ( (SDL_strncmp(XDisplayName(display), ":", 1) == 0) || |
| (SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) { |
| dpy = XOpenDisplay(display); |
| if ( dpy ) { |
| int events, errors, major, minor; |
| |
| if ( SDL_NAME(XDGAQueryExtension)(dpy, &events, &errors) && |
| SDL_NAME(XDGAQueryVersion)(dpy, &major, &minor) ) { |
| int screen; |
| |
| screen = DefaultScreen(dpy); |
| if ( (major >= 2) && |
| SDL_NAME(XDGAOpenFramebuffer)(dpy, screen) ) { |
| available = 1; |
| SDL_NAME(XDGACloseFramebuffer)(dpy, screen); |
| } |
| } |
| XCloseDisplay(dpy); |
| } |
| } |
| SDL_X11_UnloadSymbols(); |
| } |
| return(available); |
| } |
| |
| static void DGA_DeleteDevice(SDL_VideoDevice *device) |
| { |
| if (device != NULL) { |
| SDL_free(device->hidden); |
| SDL_free(device); |
| SDL_X11_UnloadSymbols(); |
| } |
| } |
| |
| static SDL_VideoDevice *DGA_CreateDevice(int devindex) |
| { |
| SDL_VideoDevice *device = NULL; |
| |
| /* Initialize all variables that we clean on shutdown */ |
| if (SDL_X11_LoadSymbols()) { |
| 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); |
| } |
| SDL_X11_UnloadSymbols(); |
| return(0); |
| } |
| SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| |
| /* Set the function pointers */ |
| device->VideoInit = DGA_VideoInit; |
| device->ListModes = DGA_ListModes; |
| device->SetVideoMode = DGA_SetVideoMode; |
| device->SetColors = DGA_SetColors; |
| device->UpdateRects = NULL; |
| device->VideoQuit = DGA_VideoQuit; |
| device->AllocHWSurface = DGA_AllocHWSurface; |
| device->CheckHWBlit = DGA_CheckHWBlit; |
| device->FillHWRect = DGA_FillHWRect; |
| device->SetHWColorKey = NULL; |
| device->SetHWAlpha = NULL; |
| device->LockHWSurface = DGA_LockHWSurface; |
| device->UnlockHWSurface = DGA_UnlockHWSurface; |
| device->FlipHWSurface = DGA_FlipHWSurface; |
| device->FreeHWSurface = DGA_FreeHWSurface; |
| device->SetGammaRamp = DGA_SetGammaRamp; |
| device->GetGammaRamp = NULL; |
| device->SetCaption = NULL; |
| device->SetIcon = NULL; |
| device->IconifyWindow = NULL; |
| device->GrabInput = NULL; |
| device->GetWMInfo = NULL; |
| device->InitOSKeymap = DGA_InitOSKeymap; |
| device->PumpEvents = DGA_PumpEvents; |
| |
| device->free = DGA_DeleteDevice; |
| } |
| |
| return device; |
| } |
| |
| VideoBootStrap DGA_bootstrap = { |
| "dga", "XFree86 DGA 2.0", |
| DGA_Available, DGA_CreateDevice |
| }; |
| |
| static int DGA_AddMode(_THIS, int bpp, int w, int h) |
| { |
| SDL_Rect *mode; |
| int index; |
| int next_mode; |
| |
| /* Check to see if we already have this mode */ |
| if ( bpp < 8 ) { /* Not supported */ |
| return(0); |
| } |
| index = ((bpp+7)/8)-1; |
| if ( SDL_nummodes[index] > 0 ) { |
| mode = SDL_modelist[index][SDL_nummodes[index]-1]; |
| if ( (mode->w == w) && (mode->h == h) ) { |
| return(0); |
| } |
| } |
| |
| /* Set up the new video mode rectangle */ |
| mode = (SDL_Rect *)SDL_malloc(sizeof *mode); |
| if ( mode == NULL ) { |
| SDL_OutOfMemory(); |
| return(-1); |
| } |
| mode->x = 0; |
| mode->y = 0; |
| mode->w = w; |
| mode->h = h; |
| |
| /* Allocate the new list of modes, and fill in the new mode */ |
| next_mode = SDL_nummodes[index]; |
| SDL_modelist[index] = (SDL_Rect **) |
| SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *)); |
| if ( SDL_modelist[index] == NULL ) { |
| SDL_OutOfMemory(); |
| SDL_nummodes[index] = 0; |
| SDL_free(mode); |
| return(-1); |
| } |
| SDL_modelist[index][next_mode] = mode; |
| SDL_modelist[index][next_mode+1] = NULL; |
| SDL_nummodes[index]++; |
| |
| return(0); |
| } |
| |
| /* This whole function is a hack. :) */ |
| static Uint32 get_video_size(_THIS) |
| { |
| /* This is a non-exported function from libXxf86dga.a */ |
| extern unsigned char *SDL_NAME(XDGAGetMappedMemory)(int screen); |
| FILE *proc; |
| unsigned long mem; |
| unsigned start, stop; |
| char line[BUFSIZ]; |
| Uint32 size; |
| |
| mem = (unsigned long)SDL_NAME(XDGAGetMappedMemory)(DGA_Screen); |
| size = 0; |
| proc = fopen("/proc/self/maps", "r"); |
| if ( proc ) { |
| while ( fgets(line, sizeof(line)-1, proc) ) { |
| SDL_sscanf(line, "%x-%x", &start, &stop); |
| if ( start == mem ) { |
| size = (Uint32)((stop-start)/1024); |
| break; |
| } |
| } |
| fclose(proc); |
| } |
| return(size); |
| } |
| |
| #ifdef DGA_DEBUG |
| static void PrintMode(SDL_NAME(XDGAMode) *mode) |
| { |
| printf("Mode: %s (%dx%d) at %d bpp (%f refresh, %d pitch) num: %d\n", |
| mode->name, |
| mode->viewportWidth, mode->viewportHeight, |
| mode->depth == 24 ? mode->bitsPerPixel : mode->depth, |
| mode->verticalRefresh, mode->bytesPerScanline, mode->num); |
| printf("\tRGB: 0x%8.8x 0x%8.8x 0x%8.8x (%d - %s)\n", |
| mode->redMask, mode->greenMask, mode->blueMask, |
| mode->visualClass, |
| mode->visualClass == TrueColor ? "truecolor" : |
| mode->visualClass == DirectColor ? "directcolor" : |
| mode->visualClass == PseudoColor ? "pseudocolor" : "unknown"); |
| printf("\tFlags: "); |
| if ( mode->flags & XDGAConcurrentAccess ) |
| printf(" XDGAConcurrentAccess"); |
| if ( mode->flags & XDGASolidFillRect ) |
| printf(" XDGASolidFillRect"); |
| if ( mode->flags & XDGABlitRect ) |
| printf(" XDGABlitRect"); |
| if ( mode->flags & XDGABlitTransRect ) |
| printf(" XDGABlitTransRect"); |
| if ( mode->flags & XDGAPixmap ) |
| printf(" XDGAPixmap"); |
| if ( mode->flags & XDGAInterlaced ) |
| printf(" XDGAInterlaced"); |
| if ( mode->flags & XDGADoublescan ) |
| printf(" XDGADoublescan"); |
| if ( mode->viewportFlags & XDGAFlipRetrace ) |
| printf(" XDGAFlipRetrace"); |
| if ( mode->viewportFlags & XDGAFlipImmediate ) |
| printf(" XDGAFlipImmediate"); |
| printf("\n"); |
| } |
| #endif /* DGA_DEBUG */ |
| |
| static int cmpmodes(const void *va, const void *vb) |
| { |
| const SDL_NAME(XDGAMode) *a = (const SDL_NAME(XDGAMode) *)va; |
| const SDL_NAME(XDGAMode) *b = (const SDL_NAME(XDGAMode) *)vb; |
| |
| if ( (a->viewportWidth == b->viewportWidth) && |
| (b->viewportHeight == a->viewportHeight) ) { |
| /* Prefer 32 bpp over 24 bpp, 16 bpp over 15 bpp */ |
| int a_bpp = a->depth == 24 ? a->bitsPerPixel : a->depth; |
| int b_bpp = b->depth == 24 ? b->bitsPerPixel : b->depth; |
| if ( a_bpp != b_bpp ) { |
| return b_bpp - a_bpp; |
| } |
| /* Prefer DirectColor visuals, for gamma support */ |
| if ( a->visualClass == DirectColor && b->visualClass != DirectColor ) |
| return -1; |
| if ( b->visualClass == DirectColor && a->visualClass != DirectColor ) |
| return 1; |
| /* Maintain server refresh rate sorting */ |
| return a->num - b->num; |
| } else if ( a->viewportWidth == b->viewportWidth ) { |
| return b->viewportHeight - a->viewportHeight; |
| } else { |
| return b->viewportWidth - a->viewportWidth; |
| } |
| } |
| static void UpdateHWInfo(_THIS, SDL_NAME(XDGAMode) *mode) |
| { |
| this->info.wm_available = 0; |
| this->info.hw_available = 1; |
| if ( mode->flags & XDGABlitRect ) { |
| this->info.blit_hw = 1; |
| } else { |
| this->info.blit_hw = 0; |
| } |
| if ( mode->flags & XDGABlitTransRect ) { |
| this->info.blit_hw_CC = 1; |
| } else { |
| this->info.blit_hw_CC = 0; |
| } |
| if ( mode->flags & XDGASolidFillRect ) { |
| this->info.blit_fill = 1; |
| } else { |
| this->info.blit_fill = 0; |
| } |
| this->info.video_mem = get_video_size(this); |
| } |
| |
| static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
| { |
| const char *env; |
| const char *display; |
| int event_base, error_base; |
| int major_version, minor_version; |
| Visual *visual; |
| SDL_NAME(XDGAMode) *modes; |
| int i, num_modes; |
| |
| /* Open the X11 display */ |
| display = NULL; /* Get it from DISPLAY environment variable */ |
| |
| DGA_Display = XOpenDisplay(display); |
| if ( DGA_Display == NULL ) { |
| SDL_SetError("Couldn't open X11 display"); |
| return(-1); |
| } |
| |
| /* Check for the DGA extension */ |
| if ( ! SDL_NAME(XDGAQueryExtension)(DGA_Display, &event_base, &error_base) || |
| ! SDL_NAME(XDGAQueryVersion)(DGA_Display, &major_version, &minor_version) ) { |
| SDL_SetError("DGA extension not available"); |
| XCloseDisplay(DGA_Display); |
| return(-1); |
| } |
| if ( major_version < 2 ) { |
| SDL_SetError("DGA driver requires DGA 2.0 or newer"); |
| XCloseDisplay(DGA_Display); |
| return(-1); |
| } |
| DGA_event_base = event_base; |
| |
| /* Determine the current screen size */ |
| this->info.current_w = DisplayWidth(DGA_Display, DGA_Screen); |
| this->info.current_h = DisplayHeight(DGA_Display, DGA_Screen); |
| |
| /* Determine the current screen depth */ |
| visual = DefaultVisual(DGA_Display, DGA_Screen); |
| { |
| XPixmapFormatValues *pix_format; |
| int i, num_formats; |
| |
| vformat->BitsPerPixel = DefaultDepth(DGA_Display, DGA_Screen); |
| pix_format = XListPixmapFormats(DGA_Display, &num_formats); |
| if ( pix_format == NULL ) { |
| SDL_SetError("Couldn't determine screen formats"); |
| XCloseDisplay(DGA_Display); |
| return(-1); |
| } |
| for ( i=0; i<num_formats; ++i ) { |
| if ( vformat->BitsPerPixel == pix_format[i].depth ) |
| break; |
| } |
| if ( i != num_formats ) |
| vformat->BitsPerPixel = pix_format[i].bits_per_pixel; |
| XFree((char *)pix_format); |
| } |
| if ( vformat->BitsPerPixel > 8 ) { |
| vformat->Rmask = visual->red_mask; |
| vformat->Gmask = visual->green_mask; |
| vformat->Bmask = visual->blue_mask; |
| } |
| |
| /* Open access to the framebuffer */ |
| if ( ! SDL_NAME(XDGAOpenFramebuffer)(DGA_Display, DGA_Screen) ) { |
| SDL_SetError("Unable to map the video memory"); |
| XCloseDisplay(DGA_Display); |
| return(-1); |
| } |
| |
| /* Allow environment override of screensaver disable. */ |
| env = SDL_getenv("SDL_VIDEO_ALLOW_SCREENSAVER"); |
| if ( env ) { |
| allow_screensaver = SDL_atoi(env); |
| } else { |
| #ifdef SDL_VIDEO_DISABLE_SCREENSAVER |
| allow_screensaver = 0; |
| #else |
| allow_screensaver = 1; |
| #endif |
| } |
| |
| /* Query for the list of available video modes */ |
| modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes); |
| SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes); |
| for ( i=0; i<num_modes; ++i ) { |
| if ( ((modes[i].visualClass == PseudoColor) || |
| (modes[i].visualClass == DirectColor) || |
| (modes[i].visualClass == TrueColor)) && |
| !(modes[i].flags & (XDGAInterlaced|XDGADoublescan)) ) { |
| #ifdef DGA_DEBUG |
| PrintMode(&modes[i]); |
| #endif |
| DGA_AddMode(this, modes[i].bitsPerPixel, |
| modes[i].viewportWidth, |
| modes[i].viewportHeight); |
| } |
| } |
| UpdateHWInfo(this, modes); |
| XFree(modes); |
| |
| /* Create the hardware surface lock mutex */ |
| hw_lock = SDL_CreateMutex(); |
| if ( hw_lock == NULL ) { |
| SDL_SetError("Unable to create lock mutex"); |
| DGA_VideoQuit(this); |
| return(-1); |
| } |
| |
| #ifdef LOCK_DGA_DISPLAY |
| /* Create the event lock so we're thread-safe.. :-/ */ |
| event_lock = SDL_CreateMutex(); |
| #endif /* LOCK_DGA_DISPLAY */ |
| |
| /* We're done! */ |
| return(0); |
| } |
| |
| SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
| { |
| return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
| } |
| |
| /* Various screen update functions available */ |
| static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
| |
| SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, |
| int width, int height, int bpp, Uint32 flags) |
| { |
| SDL_NAME(XDGAMode) *modes; |
| int i, num_modes; |
| SDL_NAME(XDGADevice) *mode; |
| int screen_len; |
| Uint8 *surfaces_mem; |
| int surfaces_len; |
| |
| /* Free any previous colormap */ |
| if ( DGA_colormap ) { |
| XFreeColormap(DGA_Display, DGA_colormap); |
| DGA_colormap = 0; |
| } |
| |
| /* Search for a matching video mode */ |
| modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes); |
| SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes); |
| for ( i=0; i<num_modes; ++i ) { |
| int depth; |
| |
| depth = modes[i].depth; |
| if ( depth == 24 ) { /* Distinguish between 24 and 32 bpp */ |
| depth = modes[i].bitsPerPixel; |
| } |
| if ( (depth == bpp) && |
| (modes[i].viewportWidth == width) && |
| (modes[i].viewportHeight == height) && |
| ((modes[i].visualClass == PseudoColor) || |
| (modes[i].visualClass == DirectColor) || |
| (modes[i].visualClass == TrueColor)) && |
| !(modes[i].flags & (XDGAInterlaced|XDGADoublescan)) ) { |
| break; |
| } |
| } |
| if ( i == num_modes ) { |
| SDL_SetError("No matching video mode found"); |
| return(NULL); |
| } |
| #ifdef DGA_DEBUG |
| PrintMode(&modes[i]); |
| #endif |
| |
| /* Set the video mode */ |
| mode = SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, modes[i].num); |
| XFree(modes); |
| if ( mode == NULL ) { |
| SDL_SetError("Unable to switch to requested mode"); |
| return(NULL); |
| } |
| DGA_visualClass = mode->mode.visualClass; |
| memory_base = (Uint8 *)mode->data; |
| memory_pitch = mode->mode.bytesPerScanline; |
| |
| /* Set up the new mode framebuffer */ |
| current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); |
| current->w = mode->mode.viewportWidth; |
| current->h = mode->mode.viewportHeight; |
| current->pitch = memory_pitch; |
| current->pixels = memory_base; |
| if ( ! SDL_ReallocFormat(current, mode->mode.bitsPerPixel, |
| mode->mode.redMask, |
| mode->mode.greenMask, |
| mode->mode.blueMask, 0) ) { |
| return(NULL); |
| } |
| screen_len = current->h*current->pitch; |
| |
| /* Create a colormap if necessary */ |
| if ( (DGA_visualClass == PseudoColor) || |
| (DGA_visualClass == DirectColor) ) { |
| DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen, |
| mode, AllocAll); |
| if ( DGA_visualClass == PseudoColor ) { |
| current->flags |= SDL_HWPALETTE; |
| } else { |
| /* Initialize the colormap to the identity mapping */ |
| SDL_GetGammaRamp(0, 0, 0); |
| this->screen = current; |
| DGA_SetGammaRamp(this, this->gamma); |
| this->screen = NULL; |
| } |
| } else { |
| DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen, |
| mode, AllocNone); |
| } |
| SDL_NAME(XDGAInstallColormap)(DGA_Display, DGA_Screen, DGA_colormap); |
| |
| /* Update the hardware capabilities */ |
| UpdateHWInfo(this, &mode->mode); |
| |
| /* Set up the information for hardware surfaces */ |
| surfaces_mem = (Uint8 *)current->pixels + screen_len; |
| surfaces_len = (mode->mode.imageHeight*current->pitch - screen_len); |
| |
| /* Update for double-buffering, if we can */ |
| SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, 0, 0, XDGAFlipRetrace); |
| if ( flags & SDL_DOUBLEBUF ) { |
| if ( mode->mode.imageHeight >= (current->h*2) ) { |
| current->flags |= SDL_DOUBLEBUF; |
| flip_page = 0; |
| flip_yoffset[0] = 0; |
| flip_yoffset[1] = current->h; |
| flip_address[0] = memory_base; |
| flip_address[1] = memory_base+screen_len; |
| surfaces_mem += screen_len; |
| surfaces_len -= screen_len; |
| } |
| } |
| |
| /* Allocate memory tracking for hardware surfaces */ |
| DGA_FreeHWSurfaces(this); |
| if ( surfaces_len < 0 ) { |
| surfaces_len = 0; |
| } |
| DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len); |
| |
| /* Expose the back buffer as surface memory */ |
| if ( current->flags & SDL_DOUBLEBUF ) { |
| this->screen = current; |
| DGA_FlipHWSurface(this, current); |
| this->screen = NULL; |
| } |
| |
| /* Set the update rectangle function */ |
| this->UpdateRects = DGA_DirectUpdate; |
| |
| /* Enable mouse and keyboard support */ |
| { long input_mask; |
| input_mask = (KeyPressMask | KeyReleaseMask); |
| input_mask |= (ButtonPressMask | ButtonReleaseMask); |
| input_mask |= PointerMotionMask; |
| SDL_NAME(XDGASelectInput)(DGA_Display, DGA_Screen, input_mask); |
| } |
| |
| /* We're done */ |
| return(current); |
| } |
| |
| #ifdef DGA_DEBUG |
| static void DGA_DumpHWSurfaces(_THIS) |
| { |
| vidmem_bucket *bucket; |
| |
| printf("Memory left: %d (%d total)\n", surfaces_memleft, surfaces_memtotal); |
| printf("\n"); |
| printf(" Base Size\n"); |
| for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| printf("Bucket: %p, %d (%s)\n", bucket->base, bucket->size, bucket->used ? "used" : "free"); |
| if ( bucket->prev ) { |
| if ( bucket->base != bucket->prev->base+bucket->prev->size ) { |
| printf("Warning, corrupt bucket list! (prev)\n"); |
| } |
| } else { |
| if ( bucket != &surfaces ) { |
| printf("Warning, corrupt bucket list! (!prev)\n"); |
| } |
| } |
| if ( bucket->next ) { |
| if ( bucket->next->base != bucket->base+bucket->size ) { |
| printf("Warning, corrupt bucket list! (next)\n"); |
| } |
| } |
| } |
| printf("\n"); |
| } |
| #endif |
| |
| static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size) |
| { |
| vidmem_bucket *bucket; |
| |
| surfaces_memtotal = size; |
| surfaces_memleft = size; |
| |
| if ( surfaces_memleft > 0 ) { |
| bucket = (vidmem_bucket *)SDL_malloc(sizeof(*bucket)); |
| if ( bucket == NULL ) { |
| SDL_OutOfMemory(); |
| return(-1); |
| } |
| bucket->prev = &surfaces; |
| bucket->used = 0; |
| bucket->dirty = 0; |
| bucket->base = base; |
| bucket->size = size; |
| bucket->next = NULL; |
| } else { |
| bucket = NULL; |
| } |
| |
| surfaces.prev = NULL; |
| surfaces.used = 1; |
| surfaces.dirty = 0; |
| surfaces.base = screen->pixels; |
| surfaces.size = (unsigned int)((long)base - (long)surfaces.base); |
| surfaces.next = bucket; |
| screen->hwdata = (struct private_hwdata *)((char*)&surfaces); |
| return(0); |
| } |
| static void DGA_FreeHWSurfaces(_THIS) |
| { |
| vidmem_bucket *bucket, *freeable; |
| |
| bucket = surfaces.next; |
| while ( bucket ) { |
| freeable = bucket; |
| bucket = bucket->next; |
| SDL_free(freeable); |
| } |
| surfaces.next = NULL; |
| } |
| |
| static __inline__ void DGA_AddBusySurface(SDL_Surface *surface) |
| { |
| ((vidmem_bucket *)surface->hwdata)->dirty = 1; |
| } |
| |
| static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface) |
| { |
| return ((vidmem_bucket *)surface->hwdata)->dirty; |
| } |
| |
| static __inline__ void DGA_WaitBusySurfaces(_THIS) |
| { |
| vidmem_bucket *bucket; |
| |
| /* Wait for graphic operations to complete */ |
| SDL_NAME(XDGASync)(DGA_Display, DGA_Screen); |
| |
| /* Clear all surface dirty bits */ |
| for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| bucket->dirty = 0; |
| } |
| } |
| |
| static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface) |
| { |
| vidmem_bucket *bucket; |
| int size; |
| int extra; |
| int retval = 0; |
| |
| /* Temporarily, we only allow surfaces the same width as display. |
| Some blitters require the pitch between two hardware surfaces |
| to be the same. Others have interesting alignment restrictions. |
| */ |
| if ( surface->pitch > SDL_VideoSurface->pitch ) { |
| SDL_SetError("Surface requested wider than screen"); |
| return(-1); |
| } |
| surface->pitch = SDL_VideoSurface->pitch; |
| size = surface->h * surface->pitch; |
| #ifdef DGA_DEBUG |
| fprintf(stderr, "Allocating bucket of %d bytes\n", size); |
| #endif |
| LOCK_DISPLAY(); |
| |
| /* Quick check for available mem */ |
| if ( size > surfaces_memleft ) { |
| SDL_SetError("Not enough video memory"); |
| retval = -1; |
| goto done; |
| } |
| |
| /* Search for an empty bucket big enough */ |
| for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| if ( ! bucket->used && (size <= bucket->size) ) { |
| break; |
| } |
| } |
| if ( bucket == NULL ) { |
| SDL_SetError("Video memory too fragmented"); |
| retval = -1; |
| goto done; |
| } |
| |
| /* Create a new bucket for left-over memory */ |
| extra = (bucket->size - size); |
| if ( extra ) { |
| vidmem_bucket *newbucket; |
| |
| #ifdef DGA_DEBUG |
| fprintf(stderr, "Adding new free bucket of %d bytes\n", extra); |
| #endif |
| newbucket = (vidmem_bucket *)SDL_malloc(sizeof(*newbucket)); |
| if ( newbucket == NULL ) { |
| SDL_OutOfMemory(); |
| retval = -1; |
| goto done; |
| } |
| newbucket->prev = bucket; |
| newbucket->used = 0; |
| newbucket->base = bucket->base+size; |
| newbucket->size = extra; |
| newbucket->next = bucket->next; |
| if ( bucket->next ) { |
| bucket->next->prev = newbucket; |
| } |
| bucket->next = newbucket; |
| } |
| |
| /* Set the current bucket values and return it! */ |
| bucket->used = 1; |
| bucket->size = size; |
| bucket->dirty = 0; |
| #ifdef DGA_DEBUG |
| fprintf(stderr, "Allocated %d bytes at %p\n", bucket->size, bucket->base); |
| #endif |
| surfaces_memleft -= size; |
| surface->flags |= SDL_HWSURFACE; |
| surface->pixels = bucket->base; |
| surface->hwdata = (struct private_hwdata *)bucket; |
| done: |
| UNLOCK_DISPLAY(); |
| return(retval); |
| } |
| static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface) |
| { |
| vidmem_bucket *bucket, *freeable; |
| |
| /* Wait for any pending operations involving this surface */ |
| if ( DGA_IsSurfaceBusy(surface) ) { |
| LOCK_DISPLAY(); |
| DGA_WaitBusySurfaces(this); |
| UNLOCK_DISPLAY(); |
| } |
| |
| /* Look for the bucket in the current list */ |
| for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
| if ( bucket == (vidmem_bucket *)surface->hwdata ) { |
| break; |
| } |
| } |
| if ( bucket && bucket->used ) { |
| /* Add the memory back to the total */ |
| #ifdef DGA_DEBUG |
| printf("Freeing bucket of %d bytes\n", bucket->size); |
| #endif |
| surfaces_memleft += bucket->size; |
| |
| /* Can we merge the space with surrounding buckets? */ |
| bucket->used = 0; |
| if ( bucket->next && ! bucket->next->used ) { |
| #ifdef DGA_DEBUG |
| printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size); |
| #endif |
| freeable = bucket->next; |
| bucket->size += bucket->next->size; |
| bucket->next = bucket->next->next; |
| if ( bucket->next ) { |
| bucket->next->prev = bucket; |
| } |
| SDL_free(freeable); |
| } |
| if ( bucket->prev && ! bucket->prev->used ) { |
| #ifdef DGA_DEBUG |
| printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size); |
| #endif |
| freeable = bucket; |
| bucket->prev->size += bucket->size; |
| bucket->prev->next = bucket->next; |
| if ( bucket->next ) { |
| bucket->next->prev = bucket->prev; |
| } |
| SDL_free(freeable); |
| } |
| } |
| surface->pixels = NULL; |
| surface->hwdata = NULL; |
| } |
| |
| static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y) |
| { |
| *x = (long)((Uint8 *)dst->pixels - memory_base)%memory_pitch; |
| *y = (long)((Uint8 *)dst->pixels - memory_base)/memory_pitch; |
| } |
| |
| static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) |
| { |
| int x, y; |
| unsigned int w, h; |
| |
| /* Don't fill the visible part of the screen, wait until flipped */ |
| LOCK_DISPLAY(); |
| if ( was_flipped && (dst == this->screen) ) { |
| while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
| /* Keep waiting for the hardware ... */ ; |
| was_flipped = 0; |
| } |
| DGA_dst_to_xy(this, dst, &x, &y); |
| x += rect->x; |
| y += rect->y; |
| w = rect->w; |
| h = rect->h; |
| #if 0 |
| printf("Hardware accelerated rectangle fill: %dx%d at %d,%d\n", w, h, x, y); |
| #endif |
| SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color); |
| if ( !(this->screen->flags & SDL_DOUBLEBUF) ) { |
| XFlush(DGA_Display); |
| } |
| DGA_AddBusySurface(dst); |
| UNLOCK_DISPLAY(); |
| return(0); |
| } |
| |
| static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, |
| SDL_Surface *dst, SDL_Rect *dstrect) |
| { |
| SDL_VideoDevice *this; |
| int srcx, srcy; |
| int dstx, dsty; |
| unsigned int w, h; |
| |
| this = current_video; |
| /* Don't blit to the visible part of the screen, wait until flipped */ |
| LOCK_DISPLAY(); |
| if ( was_flipped && (dst == this->screen) ) { |
| while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
| /* Keep waiting for the hardware ... */ ; |
| was_flipped = 0; |
| } |
| DGA_dst_to_xy(this, src, &srcx, &srcy); |
| srcx += srcrect->x; |
| srcy += srcrect->y; |
| DGA_dst_to_xy(this, dst, &dstx, &dsty); |
| dstx += dstrect->x; |
| dsty += dstrect->y; |
| w = srcrect->w; |
| h = srcrect->h; |
| #if 0 |
| printf("Blitting %dx%d from %d,%d to %d,%d\n", w, h, srcx, srcy, dstx, dsty); |
| #endif |
| if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
| SDL_NAME(XDGACopyTransparentArea)(DGA_Display, DGA_Screen, |
| srcx, srcy, w, h, dstx, dsty, src->format->colorkey); |
| } else { |
| SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen, |
| srcx, srcy, w, h, dstx, dsty); |
| } |
| if ( !(this->screen->flags & SDL_DOUBLEBUF) ) { |
| XFlush(DGA_Display); |
| } |
| DGA_AddBusySurface(src); |
| DGA_AddBusySurface(dst); |
| UNLOCK_DISPLAY(); |
| return(0); |
| } |
| |
| static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) |
| { |
| int accelerated; |
| |
| /* Set initial acceleration on */ |
| src->flags |= SDL_HWACCEL; |
| |
| /* Set the surface attributes */ |
| if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
| if ( ! this->info.blit_hw_A ) { |
| src->flags &= ~SDL_HWACCEL; |
| } |
| } |
| if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
| if ( ! this->info.blit_hw_CC ) { |
| src->flags &= ~SDL_HWACCEL; |
| } |
| } |
| |
| /* Check to see if final surface blit is accelerated */ |
| accelerated = !!(src->flags & SDL_HWACCEL); |
| if ( accelerated ) { |
| src->map->hw_blit = HWAccelBlit; |
| } |
| return(accelerated); |
| } |
| |
| static __inline__ void DGA_WaitFlip(_THIS) |
| { |
| if ( was_flipped ) { |
| while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
| /* Keep waiting for the hardware ... */ ; |
| was_flipped = 0; |
| } |
| } |
| |
| static int DGA_LockHWSurface(_THIS, SDL_Surface *surface) |
| { |
| if ( surface == this->screen ) { |
| SDL_mutexP(hw_lock); |
| LOCK_DISPLAY(); |
| if ( DGA_IsSurfaceBusy(surface) ) { |
| DGA_WaitBusySurfaces(this); |
| } |
| DGA_WaitFlip(this); |
| UNLOCK_DISPLAY(); |
| } else { |
| if ( DGA_IsSurfaceBusy(surface) ) { |
| LOCK_DISPLAY(); |
| DGA_WaitBusySurfaces(this); |
| UNLOCK_DISPLAY(); |
| } |
| } |
| return(0); |
| } |
| static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
| { |
| if ( surface == this->screen ) { |
| SDL_mutexV(hw_lock); |
| } |
| } |
| |
| static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface) |
| { |
| /* Wait for vertical retrace and then flip display */ |
| LOCK_DISPLAY(); |
| if ( DGA_IsSurfaceBusy(this->screen) ) { |
| DGA_WaitBusySurfaces(this); |
| } |
| DGA_WaitFlip(this); |
| SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, |
| 0, flip_yoffset[flip_page], XDGAFlipRetrace); |
| XFlush(DGA_Display); |
| UNLOCK_DISPLAY(); |
| was_flipped = 1; |
| flip_page = !flip_page; |
| |
| surface->pixels = flip_address[flip_page]; |
| return(0); |
| } |
| |
| static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
| { |
| /* The application is already updating the visible video memory */ |
| return; |
| } |
| |
| static int DGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
| { |
| int i; |
| XColor *xcmap; |
| |
| /* This happens on initialization */ |
| if ( ! DGA_colormap ) { |
| return(0); |
| } |
| xcmap = SDL_stack_alloc(XColor, ncolors); |
| for ( i=0; i<ncolors; ++i ) { |
| xcmap[i].pixel = firstcolor + i; |
| xcmap[i].red = (colors[i].r<<8)|colors[i].r; |
| xcmap[i].green = (colors[i].g<<8)|colors[i].g; |
| xcmap[i].blue = (colors[i].b<<8)|colors[i].b; |
| xcmap[i].flags = (DoRed|DoGreen|DoBlue); |
| } |
| LOCK_DISPLAY(); |
| XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors); |
| XSync(DGA_Display, False); |
| UNLOCK_DISPLAY(); |
| SDL_stack_free(xcmap); |
| |
| /* That was easy. :) */ |
| return(1); |
| } |
| |
| int DGA_SetGammaRamp(_THIS, Uint16 *ramp) |
| { |
| int i, ncolors; |
| XColor xcmap[256]; |
| |
| /* See if actually setting the gamma is supported */ |
| if ( DGA_visualClass != DirectColor ) { |
| SDL_SetError("Gamma correction not supported on this visual"); |
| return(-1); |
| } |
| |
| /* Calculate the appropriate palette for the given gamma ramp */ |
| if ( this->screen->format->BitsPerPixel <= 16 ) { |
| ncolors = 64; /* Is this right? */ |
| } else { |
| ncolors = 256; |
| } |
| for ( i=0; i<ncolors; ++i ) { |
| Uint8 c = (256 * i / ncolors); |
| xcmap[i].pixel = SDL_MapRGB(this->screen->format, c, c, c); |
| xcmap[i].red = ramp[0*256+c]; |
| xcmap[i].green = ramp[1*256+c]; |
| xcmap[i].blue = ramp[2*256+c]; |
| xcmap[i].flags = (DoRed|DoGreen|DoBlue); |
| } |
| LOCK_DISPLAY(); |
| XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors); |
| XSync(DGA_Display, False); |
| UNLOCK_DISPLAY(); |
| return(0); |
| } |
| |
| void DGA_VideoQuit(_THIS) |
| { |
| int i, j; |
| |
| if ( DGA_Display ) { |
| /* Free colormap, if necessary */ |
| if ( DGA_colormap ) { |
| XFreeColormap(DGA_Display, DGA_colormap); |
| DGA_colormap = 0; |
| } |
| |
| /* Unmap memory and reset video mode */ |
| SDL_NAME(XDGACloseFramebuffer)(DGA_Display, DGA_Screen); |
| if ( this->screen ) { |
| /* Tell SDL not to free the pixels */ |
| DGA_FreeHWSurface(this, this->screen); |
| } |
| SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, 0); |
| |
| /* Clear the lock mutex */ |
| if ( hw_lock != NULL ) { |
| SDL_DestroyMutex(hw_lock); |
| hw_lock = NULL; |
| } |
| #ifdef LOCK_DGA_DISPLAY |
| if ( event_lock != NULL ) { |
| SDL_DestroyMutex(event_lock); |
| event_lock = NULL; |
| } |
| #endif /* LOCK_DGA_DISPLAY */ |
| |
| /* Clean up defined video modes */ |
| 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; |
| } |
| } |
| |
| /* Clean up the memory bucket list */ |
| DGA_FreeHWSurfaces(this); |
| |
| /* Close up the display */ |
| XCloseDisplay(DGA_Display); |
| } |
| } |