diff options
Diffstat (limited to 'src/video/dga/SDL_dgavideo.c')
| -rw-r--r-- | src/video/dga/SDL_dgavideo.c | 1101 |
1 files changed, 1101 insertions, 0 deletions
diff --git a/src/video/dga/SDL_dgavideo.c b/src/video/dga/SDL_dgavideo.c new file mode 100644 index 0000000..fbffc28 --- /dev/null +++ b/src/video/dga/SDL_dgavideo.c @@ -0,0 +1,1101 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2009 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 *)&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); + } +} |