blob: 267d5cc335475c5da190a3101874905883ed4b09 [file] [log] [blame]
/*
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);
}
}