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lilium-voyager/code/sdl/sdl_glimp.c

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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Quake III Arena source code 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#ifdef USE_LOCAL_HEADERS
# include "SDL.h"
#else
# include <SDL.h>
#endif
#if !SDL_VERSION_ATLEAST(1, 2, 10)
#define SDL_GL_ACCELERATED_VISUAL 15
#define SDL_GL_SWAP_CONTROL 16
#elif MINSDL_PATCH >= 10
#error Code block no longer necessary, please remove
#endif
#ifdef SMP
# ifdef USE_LOCAL_HEADERS
# include "SDL_thread.h"
# else
# include <SDL_thread.h>
# endif
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "../renderer/tr_local.h"
#include "../client/client.h"
#include "../sys/sys_local.h"
#include "sdl_icon.h"
/* Just hack it for now. */
#ifdef MACOS_X
#include <OpenGL/OpenGL.h>
typedef CGLContextObj QGLContext;
#define GLimp_GetCurrentContext() CGLGetCurrentContext()
#define GLimp_SetCurrentContext(ctx) CGLSetCurrentContext(ctx)
#else
typedef void *QGLContext;
#define GLimp_GetCurrentContext() (NULL)
#define GLimp_SetCurrentContext(ctx)
#endif
static QGLContext opengl_context;
typedef enum
{
RSERR_OK,
RSERR_INVALID_FULLSCREEN,
RSERR_INVALID_MODE,
RSERR_UNKNOWN
} rserr_t;
static SDL_Surface *screen = NULL;
cvar_t *r_allowSoftwareGL; // Don't abort out if a hardware visual can't be obtained
void (APIENTRYP qglActiveTextureARB) (GLenum texture);
void (APIENTRYP qglClientActiveTextureARB) (GLenum texture);
void (APIENTRYP qglMultiTexCoord2fARB) (GLenum target, GLfloat s, GLfloat t);
void (APIENTRYP qglLockArraysEXT) (GLint first, GLsizei count);
void (APIENTRYP qglUnlockArraysEXT) (void);
/*
===============
GLimp_Shutdown
===============
*/
void GLimp_Shutdown( void )
{
IN_Shutdown();
SDL_QuitSubSystem( SDL_INIT_VIDEO );
screen = NULL;
Com_Memset( &glConfig, 0, sizeof( glConfig ) );
Com_Memset( &glState, 0, sizeof( glState ) );
}
/*
===============
GLimp_LogComment
===============
*/
void GLimp_LogComment( char *comment )
{
}
/*
===============
GLimp_CompareModes
===============
*/
static int GLimp_CompareModes( const void *a, const void *b )
{
const float ASPECT_EPSILON = 0.001f;
SDL_Rect *modeA = *(SDL_Rect **)a;
SDL_Rect *modeB = *(SDL_Rect **)b;
float aspectDiffA = fabs( ( (float)modeA->w / (float)modeA->h ) - displayAspect );
float aspectDiffB = fabs( ( (float)modeB->w / (float)modeB->h ) - displayAspect );
float aspectDiffsDiff = aspectDiffA - aspectDiffB;
if( aspectDiffsDiff > ASPECT_EPSILON )
return 1;
else if( aspectDiffsDiff < -ASPECT_EPSILON )
return -1;
else
{
if( modeA->w == modeB->w )
return modeA->h - modeB->h;
else
return modeA->w - modeB->w;
}
}
/*
===============
GLimp_DetectAvailableModes
===============
*/
static void GLimp_DetectAvailableModes(void)
{
char buf[ MAX_STRING_CHARS ] = { 0 };
SDL_Rect **modes;
int numModes;
int i;
modes = SDL_ListModes( NULL, SDL_OPENGL | SDL_FULLSCREEN );
if( !modes )
{
ri.Printf( PRINT_WARNING, "Can't get list of available modes\n" );
return;
}
if( modes == (SDL_Rect **)-1 )
{
ri.Printf( PRINT_ALL, "Display supports any resolution\n" );
return; // can set any resolution
}
for( numModes = 0; modes[ numModes ]; numModes++ );
if(numModes > 1)
qsort( modes+1, numModes-1, sizeof( SDL_Rect* ), GLimp_CompareModes );
for( i = 0; i < numModes; i++ )
{
const char *newModeString = va( "%ux%u ", modes[ i ]->w, modes[ i ]->h );
if( strlen( newModeString ) < (int)sizeof( buf ) - strlen( buf ) )
Q_strcat( buf, sizeof( buf ), newModeString );
else
ri.Printf( PRINT_WARNING, "Skipping mode %ux%x, buffer too small\n", modes[i]->w, modes[i]->h );
}
if( *buf )
{
buf[ strlen( buf ) - 1 ] = 0;
ri.Printf( PRINT_ALL, "Available modes: '%s'\n", buf );
ri.Cvar_Set( "r_availableModes", buf );
}
}
/*
===============
GLimp_SetMode
===============
*/
static int GLimp_SetMode( int mode, qboolean fullscreen )
{
const char* glstring;
int sdlcolorbits;
int colorbits, depthbits, stencilbits;
int tcolorbits, tdepthbits, tstencilbits;
int i = 0;
SDL_Surface *vidscreen = NULL;
Uint32 flags = SDL_OPENGL;
const SDL_VideoInfo *videoInfo;
ri.Printf( PRINT_ALL, "Initializing OpenGL display\n");
if( displayAspect == 0.0f )
{
#if !SDL_VERSION_ATLEAST(1, 2, 10)
// 1.2.10 is needed to get the desktop resolution
displayAspect = 4.0f / 3.0f;
#elif MINSDL_PATCH >= 10
# error Ifdeffery no longer necessary, please remove
#else
// Guess the display aspect ratio through the desktop resolution
// by assuming (relatively safely) that it is set at or close to
// the display's native aspect ratio
videoInfo = SDL_GetVideoInfo( );
displayAspect = (float)videoInfo->current_w / (float)videoInfo->current_h;
#endif
ri.Printf( PRINT_ALL, "Estimated display aspect: %.3f\n", displayAspect );
}
ri.Printf (PRINT_ALL, "...setting mode %d:", mode );
if ( !R_GetModeInfo( &glConfig.vidWidth, &glConfig.vidHeight, &glConfig.windowAspect, mode ) )
{
ri.Printf( PRINT_ALL, " invalid mode\n" );
return RSERR_INVALID_MODE;
}
ri.Printf( PRINT_ALL, " %d %d\n", glConfig.vidWidth, glConfig.vidHeight);
if (fullscreen)
{
flags |= SDL_FULLSCREEN;
glConfig.isFullscreen = qtrue;
}
else
glConfig.isFullscreen = qfalse;
if (!r_colorbits->value)
colorbits = 24;
else
colorbits = r_colorbits->value;
if (!r_depthbits->value)
depthbits = 24;
else
depthbits = r_depthbits->value;
stencilbits = r_stencilbits->value;
for (i = 0; i < 16; i++)
{
// 0 - default
// 1 - minus colorbits
// 2 - minus depthbits
// 3 - minus stencil
if ((i % 4) == 0 && i)
{
// one pass, reduce
switch (i / 4)
{
case 2 :
if (colorbits == 24)
colorbits = 16;
break;
case 1 :
if (depthbits == 24)
depthbits = 16;
else if (depthbits == 16)
depthbits = 8;
case 3 :
if (stencilbits == 24)
stencilbits = 16;
else if (stencilbits == 16)
stencilbits = 8;
}
}
tcolorbits = colorbits;
tdepthbits = depthbits;
tstencilbits = stencilbits;
if ((i % 4) == 3)
{ // reduce colorbits
if (tcolorbits == 24)
tcolorbits = 16;
}
if ((i % 4) == 2)
{ // reduce depthbits
if (tdepthbits == 24)
tdepthbits = 16;
else if (tdepthbits == 16)
tdepthbits = 8;
}
if ((i % 4) == 1)
{ // reduce stencilbits
if (tstencilbits == 24)
tstencilbits = 16;
else if (tstencilbits == 16)
tstencilbits = 8;
else
tstencilbits = 0;
}
sdlcolorbits = 4;
if (tcolorbits == 24)
sdlcolorbits = 8;
SDL_GL_SetAttribute( SDL_GL_RED_SIZE, sdlcolorbits );
SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, sdlcolorbits );
SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, sdlcolorbits );
SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, tdepthbits );
SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, tstencilbits );
if(r_stereoEnabled->integer)
{
glConfig.stereoEnabled = qtrue;
SDL_GL_SetAttribute(SDL_GL_STEREO, 1);
}
else
{
glConfig.stereoEnabled = qfalse;
SDL_GL_SetAttribute(SDL_GL_STEREO, 0);
}
SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
#if 0 // See http://bugzilla.icculus.org/show_bug.cgi?id=3526
// If not allowing software GL, demand accelerated
if( !r_allowSoftwareGL->integer )
{
if( SDL_GL_SetAttribute( SDL_GL_ACCELERATED_VISUAL, 1 ) < 0 )
{
ri.Printf( PRINT_ALL, "Unable to guarantee accelerated "
"visual with libSDL < 1.2.10\n" );
}
}
#endif
if( SDL_GL_SetAttribute( SDL_GL_SWAP_CONTROL, r_swapInterval->integer ) < 0 )
ri.Printf( PRINT_ALL, "r_swapInterval requires libSDL >= 1.2.10\n" );
#ifdef USE_ICON
{
SDL_Surface *icon = SDL_CreateRGBSurfaceFrom(
(void *)CLIENT_WINDOW_ICON.pixel_data,
CLIENT_WINDOW_ICON.width,
CLIENT_WINDOW_ICON.height,
CLIENT_WINDOW_ICON.bytes_per_pixel * 8,
CLIENT_WINDOW_ICON.bytes_per_pixel * CLIENT_WINDOW_ICON.width,
#ifdef Q3_LITTLE_ENDIAN
0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000
#else
0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF
#endif
);
SDL_WM_SetIcon( icon, NULL );
SDL_FreeSurface( icon );
}
#endif
SDL_WM_SetCaption(CLIENT_WINDOW_TITLE, CLIENT_WINDOW_MIN_TITLE);
SDL_ShowCursor(0);
if (!(vidscreen = SDL_SetVideoMode(glConfig.vidWidth, glConfig.vidHeight, colorbits, flags)))
{
ri.Printf( PRINT_DEVELOPER, "SDL_SetVideoMode failed: %s\n", SDL_GetError( ) );
continue;
}
opengl_context = GLimp_GetCurrentContext();
ri.Printf( PRINT_ALL, "Using %d/%d/%d Color bits, %d depth, %d stencil display.\n",
sdlcolorbits, sdlcolorbits, sdlcolorbits, tdepthbits, tstencilbits);
glConfig.colorBits = tcolorbits;
glConfig.depthBits = tdepthbits;
glConfig.stencilBits = tstencilbits;
break;
}
GLimp_DetectAvailableModes();
if (!vidscreen)
{
ri.Printf( PRINT_ALL, "Couldn't get a visual\n" );
return RSERR_INVALID_MODE;
}
screen = vidscreen;
glstring = (char *) qglGetString (GL_RENDERER);
ri.Printf( PRINT_ALL, "GL_RENDERER: %s\n", glstring );
return RSERR_OK;
}
/*
===============
GLimp_StartDriverAndSetMode
===============
*/
static qboolean GLimp_StartDriverAndSetMode( int mode, qboolean fullscreen )
{
rserr_t err;
if (!SDL_WasInit(SDL_INIT_VIDEO))
{
ri.Printf( PRINT_ALL, "SDL_Init( SDL_INIT_VIDEO )... ");
if (SDL_Init(SDL_INIT_VIDEO) == -1)
{
ri.Printf( PRINT_ALL, "FAILED (%s)\n", SDL_GetError());
return qfalse;
}
ri.Printf( PRINT_ALL, "OK\n");
}
if (fullscreen && Cvar_VariableIntegerValue( "in_nograb" ) )
{
ri.Printf( PRINT_ALL, "Fullscreen not allowed with in_nograb 1\n");
ri.Cvar_Set( "r_fullscreen", "0" );
r_fullscreen->modified = qfalse;
fullscreen = qfalse;
}
err = GLimp_SetMode( mode, fullscreen );
switch ( err )
{
case RSERR_INVALID_FULLSCREEN:
ri.Printf( PRINT_ALL, "...WARNING: fullscreen unavailable in this mode\n" );
return qfalse;
case RSERR_INVALID_MODE:
ri.Printf( PRINT_ALL, "...WARNING: could not set the given mode (%d)\n", mode );
return qfalse;
default:
break;
}
return qtrue;
}
/*
===============
GLimp_InitExtensions
===============
*/
static void GLimp_InitExtensions( void )
{
if ( !r_allowExtensions->integer )
{
ri.Printf( PRINT_ALL, "* IGNORING OPENGL EXTENSIONS *\n" );
return;
}
ri.Printf( PRINT_ALL, "Initializing OpenGL extensions\n" );
// GL_S3_s3tc
if ( Q_stristr( glConfig.extensions_string, "GL_S3_s3tc" ) )
{
if ( r_ext_compressed_textures->value )
{
glConfig.textureCompression = TC_S3TC;
ri.Printf( PRINT_ALL, "...using GL_S3_s3tc\n" );
}
else
{
glConfig.textureCompression = TC_NONE;
ri.Printf( PRINT_ALL, "...ignoring GL_S3_s3tc\n" );
}
}
else
{
glConfig.textureCompression = TC_NONE;
ri.Printf( PRINT_ALL, "...GL_S3_s3tc not found\n" );
}
// GL_EXT_texture_env_add
glConfig.textureEnvAddAvailable = qfalse;
if ( Q_stristr( glConfig.extensions_string, "EXT_texture_env_add" ) )
{
if ( r_ext_texture_env_add->integer )
{
glConfig.textureEnvAddAvailable = qtrue;
ri.Printf( PRINT_ALL, "...using GL_EXT_texture_env_add\n" );
}
else
{
glConfig.textureEnvAddAvailable = qfalse;
ri.Printf( PRINT_ALL, "...ignoring GL_EXT_texture_env_add\n" );
}
}
else
{
ri.Printf( PRINT_ALL, "...GL_EXT_texture_env_add not found\n" );
}
// GL_ARB_multitexture
qglMultiTexCoord2fARB = NULL;
qglActiveTextureARB = NULL;
qglClientActiveTextureARB = NULL;
if ( Q_stristr( glConfig.extensions_string, "GL_ARB_multitexture" ) )
{
if ( r_ext_multitexture->value )
{
qglMultiTexCoord2fARB = SDL_GL_GetProcAddress( "glMultiTexCoord2fARB" );
qglActiveTextureARB = SDL_GL_GetProcAddress( "glActiveTextureARB" );
qglClientActiveTextureARB = SDL_GL_GetProcAddress( "glClientActiveTextureARB" );
if ( qglActiveTextureARB )
{
GLint glint = 0;
qglGetIntegerv( GL_MAX_TEXTURE_UNITS_ARB, &glint );
glConfig.numTextureUnits = (int) glint;
if ( glConfig.numTextureUnits > 1 )
{
ri.Printf( PRINT_ALL, "...using GL_ARB_multitexture\n" );
}
else
{
qglMultiTexCoord2fARB = NULL;
qglActiveTextureARB = NULL;
qglClientActiveTextureARB = NULL;
ri.Printf( PRINT_ALL, "...not using GL_ARB_multitexture, < 2 texture units\n" );
}
}
}
else
{
ri.Printf( PRINT_ALL, "...ignoring GL_ARB_multitexture\n" );
}
}
else
{
ri.Printf( PRINT_ALL, "...GL_ARB_multitexture not found\n" );
}
// GL_EXT_compiled_vertex_array
if ( Q_stristr( glConfig.extensions_string, "GL_EXT_compiled_vertex_array" ) )
{
if ( r_ext_compiled_vertex_array->value )
{
ri.Printf( PRINT_ALL, "...using GL_EXT_compiled_vertex_array\n" );
qglLockArraysEXT = ( void ( APIENTRY * )( GLint, GLint ) ) SDL_GL_GetProcAddress( "glLockArraysEXT" );
qglUnlockArraysEXT = ( void ( APIENTRY * )( void ) ) SDL_GL_GetProcAddress( "glUnlockArraysEXT" );
if (!qglLockArraysEXT || !qglUnlockArraysEXT)
{
ri.Error (ERR_FATAL, "bad getprocaddress");
}
}
else
{
ri.Printf( PRINT_ALL, "...ignoring GL_EXT_compiled_vertex_array\n" );
}
}
else
{
ri.Printf( PRINT_ALL, "...GL_EXT_compiled_vertex_array not found\n" );
}
textureFilterAnisotropic = qfalse;
if ( strstr( glConfig.extensions_string, "GL_EXT_texture_filter_anisotropic" ) )
{
if ( r_ext_texture_filter_anisotropic->integer ) {
qglGetIntegerv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, (GLint *)&maxAnisotropy );
if ( maxAnisotropy <= 0 ) {
ri.Printf( PRINT_ALL, "...GL_EXT_texture_filter_anisotropic not properly supported!\n" );
maxAnisotropy = 0;
}
else
{
ri.Printf( PRINT_ALL, "...using GL_EXT_texture_filter_anisotropic (max: %i)\n", maxAnisotropy );
textureFilterAnisotropic = qtrue;
}
}
else
{
ri.Printf( PRINT_ALL, "...ignoring GL_EXT_texture_filter_anisotropic\n" );
}
}
else
{
ri.Printf( PRINT_ALL, "...GL_EXT_texture_filter_anisotropic not found\n" );
}
}
#define R_MODE_FALLBACK 3 // 640 * 480
/*
===============
GLimp_Init
This routine is responsible for initializing the OS specific portions
of OpenGL
===============
*/
void GLimp_Init( void )
{
qboolean success = qtrue;
r_allowSoftwareGL = ri.Cvar_Get( "r_allowSoftwareGL", "0", CVAR_LATCH );
// create the window and set up the context
if( !GLimp_StartDriverAndSetMode( r_mode->integer, r_fullscreen->integer ) )
{
if( r_mode->integer != R_MODE_FALLBACK )
{
ri.Printf( PRINT_ALL, "Setting r_mode %d failed, falling back on r_mode %d\n",
r_mode->integer, R_MODE_FALLBACK );
if( !GLimp_StartDriverAndSetMode( R_MODE_FALLBACK, r_fullscreen->integer ) )
success = qfalse;
}
else
success = qfalse;
}
if( !success )
ri.Error( ERR_FATAL, "GLimp_Init() - could not load OpenGL subsystem\n" );
// This values force the UI to disable driver selection
glConfig.driverType = GLDRV_ICD;
glConfig.hardwareType = GLHW_GENERIC;
glConfig.deviceSupportsGamma = !!( SDL_SetGamma( 1.0f, 1.0f, 1.0f ) >= 0 );
// get our config strings
Q_strncpyz( glConfig.vendor_string, (char *) qglGetString (GL_VENDOR), sizeof( glConfig.vendor_string ) );
Q_strncpyz( glConfig.renderer_string, (char *) qglGetString (GL_RENDERER), sizeof( glConfig.renderer_string ) );
if (*glConfig.renderer_string && glConfig.renderer_string[strlen(glConfig.renderer_string) - 1] == '\n')
glConfig.renderer_string[strlen(glConfig.renderer_string) - 1] = 0;
Q_strncpyz( glConfig.version_string, (char *) qglGetString (GL_VERSION), sizeof( glConfig.version_string ) );
Q_strncpyz( glConfig.extensions_string, (char *) qglGetString (GL_EXTENSIONS), sizeof( glConfig.extensions_string ) );
// initialize extensions
GLimp_InitExtensions( );
ri.Cvar_Get( "r_availableModes", "", CVAR_ROM );
// This depends on SDL_INIT_VIDEO, hence having it here
IN_Init( );
return;
}
/*
===============
GLimp_EndFrame
Responsible for doing a swapbuffers
===============
*/
void GLimp_EndFrame( void )
{
// don't flip if drawing to front buffer
if ( Q_stricmp( r_drawBuffer->string, "GL_FRONT" ) != 0 )
{
SDL_GL_SwapBuffers();
}
if( r_fullscreen->modified )
{
qboolean fullscreen;
qboolean sdlToggled = qfalse;
SDL_Surface *s = SDL_GetVideoSurface( );
if( s )
{
// Find out the current state
if( s->flags & SDL_FULLSCREEN )
fullscreen = qtrue;
else
fullscreen = qfalse;
if (r_fullscreen->integer && Cvar_VariableIntegerValue( "in_nograb" ))
{
ri.Printf( PRINT_ALL, "Fullscreen not allowed with in_nograb 1\n");
ri.Cvar_Set( "r_fullscreen", "0" );
r_fullscreen->modified = qfalse;
}
// Is the state we want different from the current state?
if( !!r_fullscreen->integer != fullscreen )
sdlToggled = SDL_WM_ToggleFullScreen( s );
else
sdlToggled = qtrue;
}
// SDL_WM_ToggleFullScreen didn't work, so do it the slow way
if( !sdlToggled )
Cbuf_AddText( "vid_restart" );
r_fullscreen->modified = qfalse;
}
}
#ifdef SMP
/*
===========================================================
SMP acceleration
===========================================================
*/
/*
* I have no idea if this will even work...most platforms don't offer
* thread-safe OpenGL libraries, and it looks like the original Linux
* code counted on each thread claiming the GL context with glXMakeCurrent(),
* which you can't currently do in SDL. We'll just have to hope for the best.
*/
static SDL_mutex *smpMutex = NULL;
static SDL_cond *renderCommandsEvent = NULL;
static SDL_cond *renderCompletedEvent = NULL;
static void (*glimpRenderThread)( void ) = NULL;
static SDL_Thread *renderThread = NULL;
/*
===============
GLimp_ShutdownRenderThread
===============
*/
static void GLimp_ShutdownRenderThread(void)
{
if (smpMutex != NULL)
{
SDL_DestroyMutex(smpMutex);
smpMutex = NULL;
}
if (renderCommandsEvent != NULL)
{
SDL_DestroyCond(renderCommandsEvent);
renderCommandsEvent = NULL;
}
if (renderCompletedEvent != NULL)
{
SDL_DestroyCond(renderCompletedEvent);
renderCompletedEvent = NULL;
}
glimpRenderThread = NULL;
}
/*
===============
GLimp_RenderThreadWrapper
===============
*/
static int GLimp_RenderThreadWrapper( void *arg )
{
Com_Printf( "Render thread starting\n" );
glimpRenderThread();
GLimp_SetCurrentContext(NULL);
Com_Printf( "Render thread terminating\n" );
return 0;
}
/*
===============
GLimp_SpawnRenderThread
===============
*/
qboolean GLimp_SpawnRenderThread( void (*function)( void ) )
{
static qboolean warned = qfalse;
if (!warned)
{
Com_Printf("WARNING: You enable r_smp at your own risk!\n");
warned = qtrue;
}
#ifndef MACOS_X
return qfalse; /* better safe than sorry for now. */
#endif
if (renderThread != NULL) /* hopefully just a zombie at this point... */
{
Com_Printf("Already a render thread? Trying to clean it up...\n");
SDL_WaitThread(renderThread, NULL);
renderThread = NULL;
GLimp_ShutdownRenderThread();
}
smpMutex = SDL_CreateMutex();
if (smpMutex == NULL)
{
Com_Printf( "smpMutex creation failed: %s\n", SDL_GetError() );
GLimp_ShutdownRenderThread();
return qfalse;
}
renderCommandsEvent = SDL_CreateCond();
if (renderCommandsEvent == NULL)
{
Com_Printf( "renderCommandsEvent creation failed: %s\n", SDL_GetError() );
GLimp_ShutdownRenderThread();
return qfalse;
}
renderCompletedEvent = SDL_CreateCond();
if (renderCompletedEvent == NULL)
{
Com_Printf( "renderCompletedEvent creation failed: %s\n", SDL_GetError() );
GLimp_ShutdownRenderThread();
return qfalse;
}
glimpRenderThread = function;
renderThread = SDL_CreateThread(GLimp_RenderThreadWrapper, NULL);
if ( renderThread == NULL )
{
ri.Printf( PRINT_ALL, "SDL_CreateThread() returned %s", SDL_GetError() );
GLimp_ShutdownRenderThread();
return qfalse;
}
else
{
// tma 01/09/07: don't think this is necessary anyway?
//
// !!! FIXME: No detach API available in SDL!
//ret = pthread_detach( renderThread );
//if ( ret ) {
//ri.Printf( PRINT_ALL, "pthread_detach returned %d: %s", ret, strerror( ret ) );
//}
}
return qtrue;
}
static volatile void *smpData = NULL;
static volatile qboolean smpDataReady;
/*
===============
GLimp_RendererSleep
===============
*/
void *GLimp_RendererSleep( void )
{
void *data = NULL;
GLimp_SetCurrentContext(NULL);
SDL_LockMutex(smpMutex);
{
smpData = NULL;
smpDataReady = qfalse;
// after this, the front end can exit GLimp_FrontEndSleep
SDL_CondSignal(renderCompletedEvent);
while ( !smpDataReady )
SDL_CondWait(renderCommandsEvent, smpMutex);
data = (void *)smpData;
}
SDL_UnlockMutex(smpMutex);
GLimp_SetCurrentContext(opengl_context);
return data;
}
/*
===============
GLimp_FrontEndSleep
===============
*/
void GLimp_FrontEndSleep( void )
{
SDL_LockMutex(smpMutex);
{
while ( smpData )
SDL_CondWait(renderCompletedEvent, smpMutex);
}
SDL_UnlockMutex(smpMutex);
GLimp_SetCurrentContext(opengl_context);
}
/*
===============
GLimp_WakeRenderer
===============
*/
void GLimp_WakeRenderer( void *data )
{
GLimp_SetCurrentContext(NULL);
SDL_LockMutex(smpMutex);
{
assert( smpData == NULL );
smpData = data;
smpDataReady = qtrue;
// after this, the renderer can continue through GLimp_RendererSleep
SDL_CondSignal(renderCommandsEvent);
}
SDL_UnlockMutex(smpMutex);
}
#else
// No SMP - stubs
void GLimp_RenderThreadWrapper( void *arg )
{
}
qboolean GLimp_SpawnRenderThread( void (*function)( void ) )
{
ri.Printf( PRINT_WARNING, "ERROR: SMP support was disabled at compile time\n");
return qfalse;
}
void *GLimp_RendererSleep( void )
{
return NULL;
}
void GLimp_FrontEndSleep( void )
{
}
void GLimp_WakeRenderer( void *data )
{
}
#endif
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