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SDL_dgavideo.c
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/*
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SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
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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.
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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.
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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
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Sam Lantinga
slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* DGA 2.0 based SDL video driver implementation.
*/
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include "../Xext/extensions/xf86dga.h"
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#include "SDL_video.h"
#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_dgavideo.h"
#include "SDL_dgamouse_c.h"
#include "SDL_dgaevents_c.h"
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/* get function pointers... */
#include "../x11/SDL_x11dyn.h"
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/* 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)
{
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const char *display = NULL;
Display *dpy = NULL;
int available = 0;
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/* The driver is available is available if the display is local
and the DGA 2.0+ extension is available, and we can map mem.
*/
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if ( SDL_X11_LoadSymbols() ) {
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if ( (SDL_strncmp(pXDisplayName(display), ":", 1) == 0) ||
(SDL_strncmp(pXDisplayName(display), "unix:", 5) == 0) ) {
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dpy = pXOpenDisplay(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);
}
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}
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pXCloseDisplay(dpy);
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}
}
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SDL_X11_UnloadSymbols();
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}
return(available);
}
static void DGA_DeleteDevice(SDL_VideoDevice *device)
{
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if (device != NULL) {
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SDL_free(device->hidden);
SDL_free(device);
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SDL_X11_UnloadSymbols();
}
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}
static SDL_VideoDevice *DGA_CreateDevice(int devindex)
{
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SDL_VideoDevice *device = NULL;
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/* Initialize all variables that we clean on shutdown */
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if (SDL_X11_LoadSymbols()) {
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device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
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if ( device ) {
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SDL_memset(device, 0, (sizeof *device));
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device->hidden = (struct SDL_PrivateVideoData *)
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SDL_malloc((sizeof *device->hidden));
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}
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if ( (device == NULL) || (device->hidden == NULL) ) {
SDL_OutOfMemory();
if ( device ) {
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SDL_free(device);
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}
SDL_X11_UnloadSymbols();
return(0);
}
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SDL_memset(device->hidden, 0, (sizeof *device->hidden));
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/* 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;
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}
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 */
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mode = (SDL_Rect *)SDL_malloc(sizeof *mode);
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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 **)
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SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
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if ( SDL_modelist[index] == NULL ) {
SDL_OutOfMemory();
SDL_nummodes[index] = 0;
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SDL_free(mode);
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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 */
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extern unsigned char *SDL_NAME(XDGAGetMappedMemory)(int screen);
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FILE *proc;
unsigned long mem;
unsigned start, stop;
char line[BUFSIZ];
Uint32 size;
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mem = (unsigned long)SDL_NAME(XDGAGetMappedMemory)(DGA_Screen);
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size = 0;
proc = fopen("/proc/self/maps", "r");
if ( proc ) {
while ( fgets(line, sizeof(line)-1, proc) ) {
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SDL_sscanf(line, "%x-%x", &start, &stop);
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if ( start == mem ) {
size = (Uint32)((stop-start)/1024);
break;
}
}
fclose(proc);
}
return(size);
}
#ifdef DGA_DEBUG
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static void PrintMode(SDL_NAME(XDGAMode) *mode)
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{
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 SDL_NAME(XDGAMode) *a = (const SDL_NAME(XDGAMode) *)va;
const SDL_NAME(XDGAMode) *b = (const SDL_NAME(XDGAMode) *)vb;
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/* Prefer DirectColor visuals for otherwise equal modes */
if ( (a->viewportWidth == b->viewportWidth) &&
(b->viewportHeight == a->viewportHeight) ) {
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if ( a->visualClass == DirectColor )
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return -1;
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if ( b->visualClass == DirectColor )
return 1;
return 0;
} else if ( a->viewportWidth == b->viewportWidth ) {
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return b->viewportHeight - a->viewportHeight;
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} else {
return b->viewportWidth - a->viewportWidth;
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}
}
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static void UpdateHWInfo(_THIS, SDL_NAME(XDGAMode) *mode)
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{
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;
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SDL_NAME(XDGAMode) *modes;
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int i, num_modes;
/* Open the X11 display */
display = NULL; /* Get it from DISPLAY environment variable */
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DGA_Display = pXOpenDisplay(display);
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if ( DGA_Display == NULL ) {
SDL_SetError("Couldn't open X11 display");
return(-1);
}
/* Check for the DGA extension */
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if ( ! SDL_NAME(XDGAQueryExtension)(DGA_Display, &event_base, &error_base) ||
! SDL_NAME(XDGAQueryVersion)(DGA_Display, &major_version, &minor_version) ) {
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SDL_SetError("DGA extension not available");
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pXCloseDisplay(DGA_Display);
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return(-1);
}
if ( major_version < 2 ) {
SDL_SetError("DGA driver requires DGA 2.0 or newer");
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pXCloseDisplay(DGA_Display);
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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);
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pix_format = pXListPixmapFormats(DGA_Display, &num_formats);
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if ( pix_format == NULL ) {
SDL_SetError("Couldn't determine screen formats");
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pXCloseDisplay(DGA_Display);
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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;
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pXFree((char *)pix_format);
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}
if ( vformat->BitsPerPixel > 8 ) {
vformat->Rmask = visual->red_mask;
vformat->Gmask = visual->green_mask;
vformat->Bmask = visual->blue_mask;
}
/* Open access to the framebuffer */
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if ( ! SDL_NAME(XDGAOpenFramebuffer)(DGA_Display, DGA_Screen) ) {
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SDL_SetError("Unable to map the video memory");
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pXCloseDisplay(DGA_Display);
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return(-1);
}
/* Query for the list of available video modes */
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modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes);
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SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes);
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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);
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pXFree(modes);
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/* 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)
{
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SDL_NAME(XDGAMode) *modes;
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int i, num_modes;
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SDL_NAME(XDGADevice) *mode;
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int screen_len;
Uint8 *surfaces_mem;
int surfaces_len;
/* Free any previous colormap */
if ( DGA_colormap ) {
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pXFreeColormap(DGA_Display, DGA_colormap);
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DGA_colormap = 0;
}
/* Search for a matching video mode */
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modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes);
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SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes);
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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 */
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mode = SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, modes[i].num);
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pXFree(modes);
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if ( mode == NULL ) {
SDL_SetError("Unable to switch to requested mode");
return(NULL);
}
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DGA_visualClass = mode->mode.visualClass;
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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) ) {
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DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen,
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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 {
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DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen,
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mode, AllocNone);
}
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SDL_NAME(XDGAInstallColormap)(DGA_Display, DGA_Screen, DGA_colormap);
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/* 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 */
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SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, 0, 0, XDGAFlipRetrace);
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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;
}
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DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len);
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/* Expose the back buffer as surface memory */
if ( current->flags & SDL_DOUBLEBUF ) {
this->screen = current;
DGA_FlipHWSurface(this, current);
this->screen = NULL;
}
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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;
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SDL_NAME(XDGASelectInput)(DGA_Display, DGA_Screen, input_mask);
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}
/* 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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600
surfaces_memtotal = size;
surfaces_memleft = size;
601
602
if ( surfaces_memleft > 0 ) {
603
bucket = (vidmem_bucket *)SDL_malloc(sizeof(*bucket));
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
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;
625
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627
628
629
630
631
632
633
634
return(0);
}
static void DGA_FreeHWSurfaces(_THIS)
{
vidmem_bucket *bucket, *freeable;
bucket = surfaces.next;
while ( bucket ) {
freeable = bucket;
bucket = bucket->next;
635
SDL_free(freeable);
636
637
638
639
}
surfaces.next = NULL;
}
640
static __inline__ void DGA_AddBusySurface(SDL_Surface *surface)
641
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643
644
{
((vidmem_bucket *)surface->hwdata)->dirty = 1;
}
645
static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface)
646
647
648
649
{
return ((vidmem_bucket *)surface->hwdata)->dirty;
}
650
static __inline__ void DGA_WaitBusySurfaces(_THIS)
651
652
653
654
{
vidmem_bucket *bucket;
/* Wait for graphic operations to complete */
655
SDL_NAME(XDGASync)(DGA_Display, DGA_Screen);
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657
658
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662
/* Clear all surface dirty bits */
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
bucket->dirty = 0;
}
}
663
664
665
666
667
static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface)
{
vidmem_bucket *bucket;
int size;
int extra;
668
int retval = 0;
669
670
671
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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
683
LOCK_DISPLAY();
684
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686
687
/* Quick check for available mem */
if ( size > surfaces_memleft ) {
SDL_SetError("Not enough video memory");
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689
retval = -1;
goto done;
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693
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699
}
/* 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");
700
701
retval = -1;
goto done;
702
703
704
705
706
707
708
709
710
711
}
/* 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
712
newbucket = (vidmem_bucket *)SDL_malloc(sizeof(*newbucket));
713
714
if ( newbucket == NULL ) {
SDL_OutOfMemory();
715
716
retval = -1;
goto done;
717
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719
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724
725
726
727
728
729
730
731
}
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;
732
bucket->dirty = 0;
733
734
735
736
737
738
#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;
739
740
741
742
surface->hwdata = (struct private_hwdata *)bucket;
done:
UNLOCK_DISPLAY();
return(retval);
743
744
745
746
747
748
}
static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface)
{
vidmem_bucket *bucket, *freeable;
/* Look for the bucket in the current list */
749
750
751
752
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
if ( bucket == (vidmem_bucket *)surface->hwdata ) {
break;
}
753
}
754
755
if ( bucket && bucket->used ) {
/* Add the memory back to the total */
756
757
758
#ifdef DGA_DEBUG
printf("Freeing bucket of %d bytes\n", bucket->size);
#endif
759
surfaces_memleft += bucket->size;
760
761
762
763
/* Can we merge the space with surrounding buckets? */
bucket->used = 0;
if ( bucket->next && ! bucket->next->used ) {
764
765
766
#ifdef DGA_DEBUG
printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size);
#endif
767
768
769
770
771
772
freeable = bucket->next;
bucket->size += bucket->next->size;
bucket->next = bucket->next->next;
if ( bucket->next ) {
bucket->next->prev = bucket;
}
773
SDL_free(freeable);
774
}
775
if ( bucket->prev && ! bucket->prev->used ) {
776
777
778
#ifdef DGA_DEBUG
printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size);
#endif
779
780
781
782
783
784
freeable = bucket;
bucket->prev->size += bucket->size;
bucket->prev->next = bucket->next;
if ( bucket->next ) {
bucket->next->prev = bucket->prev;
}
785
SDL_free(freeable);
786
787
788
}
}
surface->pixels = NULL;
789
surface->hwdata = NULL;
790
791
}
792
static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
793
794
795
796
797
798
799
800
801
802
803
{
*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 */
804
LOCK_DISPLAY();
805
if ( was_flipped && (dst == this->screen) ) {
806
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
807
808
809
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
810
DGA_dst_to_xy(this, dst, &x, &y);
811
812
813
814
815
816
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
818
SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color);
819
if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
820
pXFlush(DGA_Display);
821
}
822
DGA_AddBusySurface(dst);
823
UNLOCK_DISPLAY();
824
825
826
827
828
829
830
831
832
833
834
835
836
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 */
837
LOCK_DISPLAY();
838
if ( was_flipped && (dst == this->screen) ) {
839
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
840
841
842
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
843
DGA_dst_to_xy(this, src, &srcx, &srcy);
844
845
srcx += srcrect->x;
srcy += srcrect->y;
846
DGA_dst_to_xy(this, dst, &dstx, &dsty);
847
848
849
850
851
852
853
854
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 ) {
855
SDL_NAME(XDGACopyTransparentArea)(DGA_Display, DGA_Screen,
856
857
srcx, srcy, w, h, dstx, dsty, src->format->colorkey);
} else {
858
SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen,
859
860
srcx, srcy, w, h, dstx, dsty);
}
861
if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
862
pXFlush(DGA_Display);
863
}
864
865
DGA_AddBusySurface(src);
DGA_AddBusySurface(dst);
866
UNLOCK_DISPLAY();
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
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);
}
897
static __inline__ void DGA_WaitFlip(_THIS)
898
899
{
if ( was_flipped ) {
900
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
901
902
903
904
905
906
907
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
}
static int DGA_LockHWSurface(_THIS, SDL_Surface *surface)
{
908
if ( surface == this->screen ) {
909
SDL_mutexP(hw_lock);
910
LOCK_DISPLAY();
911
912
if ( DGA_IsSurfaceBusy(surface) ) {
DGA_WaitBusySurfaces(this);
913
914
915
916
}
DGA_WaitFlip(this);
UNLOCK_DISPLAY();
} else {
917
if ( DGA_IsSurfaceBusy(surface) ) {
918
LOCK_DISPLAY();
919
DGA_WaitBusySurfaces(this);
920
921
UNLOCK_DISPLAY();
}
922
923
924
925
926
}
return(0);
}
static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
927
if ( surface == this->screen ) {
928
929
930
931
932
933
934
SDL_mutexV(hw_lock);
}
}
static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface)
{
/* Wait for vertical retrace and then flip display */
935
LOCK_DISPLAY();
936
937
if ( DGA_IsSurfaceBusy(this->screen) ) {
DGA_WaitBusySurfaces(this);
938
939
}
DGA_WaitFlip(this);
940
SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen,
941
0, flip_yoffset[flip_page], XDGAFlipRetrace);
942
pXFlush(DGA_Display);
943
UNLOCK_DISPLAY();
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
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);
}
966
xcmap = SDL_stack_alloc(XColor, ncolors);
967
968
969
970
971
972
973
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);
}
974
LOCK_DISPLAY();
975
976
pXStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors);
pXSync(DGA_Display, False);
977
UNLOCK_DISPLAY();
978
SDL_stack_free(xcmap);
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;
}