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SDL_dgavideo.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001 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@devolution.com
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/* DGA 2.0 based SDL video driver implementation.
*/
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/extensions/xf86dga.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#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_dgavideo.h"
#include "SDL_dgamouse_c.h"
#include "SDL_dgaevents_c.h"
/* 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 */
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static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size);
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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;
Display *dpy;
int available;
/* The driver is available is available if the display is local
and the DGA 2.0+ extension is available, and we can map mem.
*/
available = 0;
display = NULL;
if ( (strncmp(XDisplayName(display), ":", 1) == 0) ||
(strncmp(XDisplayName(display), "unix:", 5) == 0) ) {
dpy = XOpenDisplay(display);
if ( dpy ) {
int events, errors, major, minor;
if ( XDGAQueryExtension(dpy, &events, &errors) &&
XDGAQueryVersion(dpy, &major, &minor) ) {
int screen;
screen = DefaultScreen(dpy);
if ( (major >= 2) &&
XDGAOpenFramebuffer(dpy, screen) ) {
available = 1;
XDGACloseFramebuffer(dpy, screen);
}
}
XCloseDisplay(dpy);
}
}
return(available);
}
static void DGA_DeleteDevice(SDL_VideoDevice *device)
{
free(device->hidden);
free(device);
}
static SDL_VideoDevice *DGA_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 = 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 i, 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;
for ( i=0; i<SDL_nummodes[index]; ++i ) {
mode = SDL_modelist[index][i];
if ( (mode->w == w) && (mode->h == h) ) {
return(0);
}
}
/* Set up the new video mode rectangle */
mode = (SDL_Rect *)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 **)
realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
if ( SDL_modelist[index] == NULL ) {
SDL_OutOfMemory();
SDL_nummodes[index] = 0;
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 *XDGAGetMappedMemory(int screen);
FILE *proc;
unsigned long mem;
unsigned start, stop;
char line[BUFSIZ];
Uint32 size;
mem = (unsigned long)XDGAGetMappedMemory(DGA_Screen);
size = 0;
proc = fopen("/proc/self/maps", "r");
if ( proc ) {
while ( fgets(line, sizeof(line)-1, proc) ) {
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(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)
{
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const XDGAMode *a = (const XDGAMode *)va;
const XDGAMode *b = (const XDGAMode *)vb;
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/* Prefer DirectColor visuals for otherwise equal modes */
if ( (a->viewportWidth == b->viewportWidth) &&
(b->viewportHeight == a->viewportHeight) ) {
if ( a->visualClass == DirectColor )
return -1;
if ( b->visualClass == DirectColor )
return 1;
return 0;
} else {
if(a->viewportWidth > b->viewportWidth)
return -1;
return b->viewportHeight - a->viewportHeight;
}
}
static void UpdateHWInfo(_THIS, 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 *display;
int event_base, error_base;
int major_version, minor_version;
Visual *visual;
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 ( ! XDGAQueryExtension(DGA_Display, &event_base, &error_base) ||
! 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 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 ( ! XDGAOpenFramebuffer(DGA_Display, DGA_Screen) ) {
SDL_SetError("Unable to map the video memory");
XCloseDisplay(DGA_Display);
return(-1);
}
/* Query for the list of available video modes */
modes = XDGAQueryModes(DGA_Display, DGA_Screen, &num_modes);
qsort(modes, num_modes, sizeof *modes, cmpmodes);
for ( i=0; i<num_modes; ++i ) {
#ifdef DGA_DEBUG
PrintMode(&modes[i]);
#endif
if ( (modes[i].visualClass == PseudoColor) ||
(modes[i].visualClass == DirectColor) ||
(modes[i].visualClass == TrueColor) ) {
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);
}
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#ifdef LOCK_DGA_DISPLAY
/* Create the event lock so we're thread-safe.. :-/ */
event_lock = SDL_CreateMutex();
#endif /* LOCK_DGA_DISPLAY */
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/* 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)
{
XDGAMode *modes;
int i, num_modes;
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 = XDGAQueryModes(DGA_Display, DGA_Screen, &num_modes);
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)) ) {
break;
}
}
if ( i == num_modes ) {
SDL_SetError("No matching video mode found");
return(NULL);
}
/* Set the video mode */
mode = 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 = modes[i].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 = 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 = XDGACreateColormap(DGA_Display, DGA_Screen,
mode, AllocNone);
}
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 */
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;
DGA_FlipHWSurface(this, current);
}
}
/* Allocate memory tracking for hardware surfaces */
DGA_FreeHWSurfaces(this);
if ( surfaces_len < 0 ) {
surfaces_len = 0;
}
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DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len);
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/* 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;
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
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static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size)
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{
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vidmem_bucket *bucket;
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surfaces_memtotal = size;
surfaces_memleft = size;
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if ( surfaces_memleft > 0 ) {
bucket = (vidmem_bucket *)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;
619
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633
return(0);
}
static void DGA_FreeHWSurfaces(_THIS)
{
vidmem_bucket *bucket, *freeable;
bucket = surfaces.next;
while ( bucket ) {
freeable = bucket;
bucket = bucket->next;
free(freeable);
}
surfaces.next = NULL;
}
634
static __inline__ void DGA_AddBusySurface(SDL_Surface *surface)
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{
((vidmem_bucket *)surface->hwdata)->dirty = 1;
}
639
static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface)
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{
return ((vidmem_bucket *)surface->hwdata)->dirty;
}
644
static __inline__ void DGA_WaitBusySurfaces(_THIS)
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{
vidmem_bucket *bucket;
/* Wait for graphic operations to complete */
XDGASync(DGA_Display, DGA_Screen);
/* Clear all surface dirty bits */
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
bucket->dirty = 0;
}
}
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static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface)
{
vidmem_bucket *bucket;
int size;
int extra;
662
int retval = 0;
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/* 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
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LOCK_DISPLAY();
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/* Quick check for available mem */
if ( size > surfaces_memleft ) {
SDL_SetError("Not enough video memory");
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retval = -1;
goto done;
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}
/* 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");
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retval = -1;
goto done;
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}
/* 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 *)malloc(sizeof(*newbucket));
if ( newbucket == NULL ) {
SDL_OutOfMemory();
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retval = -1;
goto done;
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}
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;
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bucket->dirty = 0;
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#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;
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surface->hwdata = (struct private_hwdata *)bucket;
done:
UNLOCK_DISPLAY();
return(retval);
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}
static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface)
{
vidmem_bucket *bucket, *freeable;
/* Look for the bucket in the current list */
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for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
if ( bucket == (vidmem_bucket *)surface->hwdata ) {
break;
}
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}
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if ( bucket && bucket->used ) {
/* Add the memory back to the total */
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#ifdef DGA_DEBUG
printf("Freeing bucket of %d bytes\n", bucket->size);
#endif
753
surfaces_memleft += bucket->size;
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/* Can we merge the space with surrounding buckets? */
bucket->used = 0;
if ( bucket->next && ! bucket->next->used ) {
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#ifdef DGA_DEBUG
printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size);
#endif
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freeable = bucket->next;
bucket->size += bucket->next->size;
bucket->next = bucket->next->next;
if ( bucket->next ) {
bucket->next->prev = bucket;
}
free(freeable);
768
}
769
if ( bucket->prev && ! bucket->prev->used ) {
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#ifdef DGA_DEBUG
printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size);
#endif
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freeable = bucket;
bucket->prev->size += bucket->size;
bucket->prev->next = bucket->next;
if ( bucket->next ) {
bucket->next->prev = bucket->prev;
}
free(freeable);
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782
}
}
surface->pixels = NULL;
783
surface->hwdata = NULL;
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}
786
static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
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{
*x = (long)((Uint8 *)dst->pixels - memory_base)%memory_pitch;
*y = (long)((Uint8 *)dst->pixels - memory_base)/memory_pitch;
if ( dst == this->screen ) {
*x += this->offset_x;
*y += this->offset_y;
}
}
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 */
802
LOCK_DISPLAY();
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807
if ( was_flipped && (dst == this->screen) ) {
while ( XDGAGetViewportStatus(DGA_Display, DGA_Screen) )
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
808
DGA_dst_to_xy(this, dst, &x, &y);
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817
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
XDGAFillRectangle(DGA_Display, DGA_Screen, x, y, w, h, color);
XFlush(DGA_Display);
818
DGA_AddBusySurface(dst);
819
UNLOCK_DISPLAY();
820
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827
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831
832
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 */
833
LOCK_DISPLAY();
834
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836
837
838
if ( was_flipped && (dst == this->screen) ) {
while ( XDGAGetViewportStatus(DGA_Display, DGA_Screen) )
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
839
DGA_dst_to_xy(this, src, &srcx, &srcy);
840
841
srcx += srcrect->x;
srcy += srcrect->y;
842
DGA_dst_to_xy(this, dst, &dstx, &dsty);
843
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851
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853
854
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856
857
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 ) {
XDGACopyTransparentArea(DGA_Display, DGA_Screen,
srcx, srcy, w, h, dstx, dsty, src->format->colorkey);
} else {
XDGACopyArea(DGA_Display, DGA_Screen,
srcx, srcy, w, h, dstx, dsty);
}
XFlush(DGA_Display);
858
859
DGA_AddBusySurface(src);
DGA_AddBusySurface(dst);
860
UNLOCK_DISPLAY();
861
862
863
864
865
866
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868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
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885
886
887
888
889
890
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);
}
891
static __inline__ void DGA_WaitFlip(_THIS)
892
893
894
895
896
897
898
899
900
901
{
if ( was_flipped ) {
while ( XDGAGetViewportStatus(DGA_Display, DGA_Screen) )
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
}
static int DGA_LockHWSurface(_THIS, SDL_Surface *surface)
{
902
if ( surface == this->screen ) {
903
SDL_mutexP(hw_lock);
904
LOCK_DISPLAY();
905
906
if ( DGA_IsSurfaceBusy(surface) ) {
DGA_WaitBusySurfaces(this);
907
908
909
910
}
DGA_WaitFlip(this);
UNLOCK_DISPLAY();
} else {
911
if ( DGA_IsSurfaceBusy(surface) ) {
912
LOCK_DISPLAY();
913
DGA_WaitBusySurfaces(this);
914
915
UNLOCK_DISPLAY();
}
916
917
918
919
920
}
return(0);
}
static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
921
if ( surface == this->screen ) {
922
923
924
925
926
927
928
SDL_mutexV(hw_lock);
}
}
static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface)
{
/* Wait for vertical retrace and then flip display */
929
LOCK_DISPLAY();
930
931
if ( DGA_IsSurfaceBusy(this->screen) ) {
DGA_WaitBusySurfaces(this);
932
933
}
DGA_WaitFlip(this);
934
935
936
XDGASetViewport(DGA_Display, DGA_Screen,
0, flip_yoffset[flip_page], XDGAFlipRetrace);
XFlush(DGA_Display);
937
UNLOCK_DISPLAY();
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
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 = (XColor *)alloca(ncolors*sizeof(*xcmap));
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);
}
968
LOCK_DISPLAY();
969
970
XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors);
XSync(DGA_Display, False);
971
UNLOCK_DISPLAY();
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* 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);