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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(XDisplayName(display), ":", 1) == 0) ||
(SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) {
dpy = XOpenDisplay(display);
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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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XCloseDisplay(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 = XOpenDisplay(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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XCloseDisplay(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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XCloseDisplay(DGA_Display);
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return(-1);
}
DGA_event_base = event_base;
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/* Determine the current screen size */
this->info.current_w = DisplayWidth(DGA_Display, DGA_Screen);
this->info.current_h = DisplayHeight(DGA_Display, DGA_Screen);
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/* 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 = XListPixmapFormats(DGA_Display, &num_formats);
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if ( pix_format == NULL ) {
SDL_SetError("Couldn't determine screen formats");
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XCloseDisplay(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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XFree((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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XCloseDisplay(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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XFree(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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XFreeColormap(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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XFree(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)
600
{
601
602
vidmem_bucket *bucket;
603
604
surfaces_memtotal = size;
surfaces_memleft = size;
605
606
if ( surfaces_memleft > 0 ) {
607
bucket = (vidmem_bucket *)SDL_malloc(sizeof(*bucket));
608
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628
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;
629
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631
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637
638
return(0);
}
static void DGA_FreeHWSurfaces(_THIS)
{
vidmem_bucket *bucket, *freeable;
bucket = surfaces.next;
while ( bucket ) {
freeable = bucket;
bucket = bucket->next;
639
SDL_free(freeable);
640
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643
}
surfaces.next = NULL;
}
644
static __inline__ void DGA_AddBusySurface(SDL_Surface *surface)
645
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{
((vidmem_bucket *)surface->hwdata)->dirty = 1;
}
649
static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface)
650
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{
return ((vidmem_bucket *)surface->hwdata)->dirty;
}
654
static __inline__ void DGA_WaitBusySurfaces(_THIS)
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658
{
vidmem_bucket *bucket;
/* Wait for graphic operations to complete */
659
SDL_NAME(XDGASync)(DGA_Display, DGA_Screen);
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/* 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;
672
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
716
newbucket = (vidmem_bucket *)SDL_malloc(sizeof(*newbucket));
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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;
736
bucket->dirty = 0;
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742
#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);
747
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752
}
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;
}
757
}
758
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if ( bucket && bucket->used ) {
/* Add the memory back to the total */
760
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762
#ifdef DGA_DEBUG
printf("Freeing bucket of %d bytes\n", bucket->size);
#endif
763
surfaces_memleft += bucket->size;
764
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766
767
/* Can we merge the space with surrounding buckets? */
bucket->used = 0;
if ( bucket->next && ! bucket->next->used ) {
768
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#ifdef DGA_DEBUG
printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size);
#endif
771
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776
freeable = bucket->next;
bucket->size += bucket->next->size;
bucket->next = bucket->next->next;
if ( bucket->next ) {
bucket->next->prev = bucket;
}
777
SDL_free(freeable);
778
}
779
if ( bucket->prev && ! bucket->prev->used ) {
780
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782
#ifdef DGA_DEBUG
printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size);
#endif
783
784
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787
788
freeable = bucket;
bucket->prev->size += bucket->size;
bucket->prev->next = bucket->next;
if ( bucket->next ) {
bucket->next->prev = bucket->prev;
}
789
SDL_free(freeable);
790
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792
}
}
surface->pixels = NULL;
793
surface->hwdata = NULL;
794
795
}
796
static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
797
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{
*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 */
808
LOCK_DISPLAY();
809
if ( was_flipped && (dst == this->screen) ) {
810
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
811
812
813
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
814
DGA_dst_to_xy(this, dst, &x, &y);
815
816
817
818
819
820
821
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
822
SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color);
823
if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
824
XFlush(DGA_Display);
825
}
826
DGA_AddBusySurface(dst);
827
UNLOCK_DISPLAY();
828
829
830
831
832
833
834
835
836
837
838
839
840
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 */
841
LOCK_DISPLAY();
842
if ( was_flipped && (dst == this->screen) ) {
843
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
844
845
846
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
847
DGA_dst_to_xy(this, src, &srcx, &srcy);
848
849
srcx += srcrect->x;
srcy += srcrect->y;
850
DGA_dst_to_xy(this, dst, &dstx, &dsty);
851
852
853
854
855
856
857
858
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 ) {
859
SDL_NAME(XDGACopyTransparentArea)(DGA_Display, DGA_Screen,
860
861
srcx, srcy, w, h, dstx, dsty, src->format->colorkey);
} else {
862
SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen,
863
864
srcx, srcy, w, h, dstx, dsty);
}
865
if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
866
XFlush(DGA_Display);
867
}
868
869
DGA_AddBusySurface(src);
DGA_AddBusySurface(dst);
870
UNLOCK_DISPLAY();
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
897
898
899
900
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);
}
901
static __inline__ void DGA_WaitFlip(_THIS)
902
903
{
if ( was_flipped ) {
904
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
905
906
907
908
909
910
911
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
}
static int DGA_LockHWSurface(_THIS, SDL_Surface *surface)
{
912
if ( surface == this->screen ) {
913
SDL_mutexP(hw_lock);
914
LOCK_DISPLAY();
915
916
if ( DGA_IsSurfaceBusy(surface) ) {
DGA_WaitBusySurfaces(this);
917
918
919
920
}
DGA_WaitFlip(this);
UNLOCK_DISPLAY();
} else {
921
if ( DGA_IsSurfaceBusy(surface) ) {
922
LOCK_DISPLAY();
923
DGA_WaitBusySurfaces(this);
924
925
UNLOCK_DISPLAY();
}
926
927
928
929
930
}
return(0);
}
static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
931
if ( surface == this->screen ) {
932
933
934
935
936
937
938
SDL_mutexV(hw_lock);
}
}
static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface)
{
/* Wait for vertical retrace and then flip display */
939
LOCK_DISPLAY();
940
941
if ( DGA_IsSurfaceBusy(this->screen) ) {
DGA_WaitBusySurfaces(this);
942
943
}
DGA_WaitFlip(this);
944
SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen,
945
0, flip_yoffset[flip_page], XDGAFlipRetrace);
946
XFlush(DGA_Display);
947
UNLOCK_DISPLAY();
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
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);
}
970
xcmap = SDL_stack_alloc(XColor, ncolors);
971
972
973
974
975
976
977
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);
}
978
LOCK_DISPLAY();
979
980
XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors);
XSync(DGA_Display, False);
981
UNLOCK_DISPLAY();
982
SDL_stack_free(xcmap);
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 ) {