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ioef/code/sdl/sdl_glimp.c
Zack Middleton 1d016e6ff5 Clear window buffer when it's created 
When starting the game in windowed mode, the window buffer used whatever
was on the screen before running the game. Kind of like you could see
through the window, but it doesn't update what happens behind it.

It makes it look like something is broken or non-responsive.

So clear the window opengl buffer to black.

Credit to theinvsblman for the code.
2014-11-07 21:50:00 -06:00

848 lines
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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
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "../renderercommon/tr_common.h"
#include "../sys/sys_local.h"
#include "sdl_icon.h"
typedef enum
{
RSERR_OK,
RSERR_INVALID_FULLSCREEN,
RSERR_INVALID_MODE,
RSERR_UNKNOWN
} rserr_t;
SDL_Window *SDL_window = NULL;
static SDL_GLContext SDL_glContext = NULL;
cvar_t *r_allowSoftwareGL; // Don't abort out if a hardware visual can't be obtained
cvar_t *r_allowResize; // make window resizable
cvar_t *r_centerWindow;
cvar_t *r_sdlDriver;
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 )
{
ri.IN_Shutdown();
SDL_QuitSubSystem( SDL_INIT_VIDEO );
}
/*
===============
GLimp_Minimize
Minimize the game so that user is back at the desktop
===============
*/
void GLimp_Minimize( void )
{
SDL_MinimizeWindow( SDL_window );
}
/*
===============
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 aspectA = (float)modeA->w / (float)modeA->h;
float aspectB = (float)modeB->w / (float)modeB->h;
int areaA = modeA->w * modeA->h;
int areaB = modeB->w * modeB->h;
float aspectDiffA = fabs( aspectA - displayAspect );
float aspectDiffB = fabs( aspectB - displayAspect );
float aspectDiffsDiff = aspectDiffA - aspectDiffB;
if( aspectDiffsDiff > ASPECT_EPSILON )
return 1;
else if( aspectDiffsDiff < -ASPECT_EPSILON )
return -1;
else
return areaA - areaB;
}
/*
===============
GLimp_DetectAvailableModes
===============
*/
static void GLimp_DetectAvailableModes(void)
{
int i, j;
char buf[ MAX_STRING_CHARS ] = { 0 };
SDL_Rect modes[ 128 ];
int numModes = 0;
int display = SDL_GetWindowDisplayIndex( SDL_window );
SDL_DisplayMode windowMode;
if( SDL_GetWindowDisplayMode( SDL_window, &windowMode ) < 0 )
{
ri.Printf( PRINT_WARNING, "Couldn't get window display mode, no resolutions detected\n" );
return;
}
for( i = 0; i < SDL_GetNumDisplayModes( display ); i++ )
{
SDL_DisplayMode mode;
if( SDL_GetDisplayMode( display, i, &mode ) < 0 )
continue;
if( !mode.w || !mode.h )
{
ri.Printf( PRINT_ALL, "Display supports any resolution\n" );
return;
}
if( windowMode.format != mode.format )
continue;
// SDL can give the same resolution with different refresh rates.
// Only list resolution once.
for( j = 0; j < numModes; j++ )
{
if( mode.w == modes[ j ].w && mode.h == modes[ j ].h )
break;
}
if( j != numModes )
continue;
modes[ numModes ].w = mode.w;
modes[ numModes ].h = mode.h;
numModes++;
}
if( numModes > 1 )
qsort( modes, numModes, 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%u, 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, qboolean noborder)
{
const char *glstring;
int perChannelColorBits;
int colorBits, depthBits, stencilBits;
int samples;
int i = 0;
SDL_Surface *icon = NULL;
Uint32 flags = SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL;
SDL_DisplayMode desktopMode;
int display = 0;
int x = SDL_WINDOWPOS_UNDEFINED, y = SDL_WINDOWPOS_UNDEFINED;
ri.Printf( PRINT_ALL, "Initializing OpenGL display\n");
if ( r_allowResize->integer )
flags |= SDL_WINDOW_RESIZABLE;
#ifdef USE_ICON
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
);
#endif
// If a window exists, note its display index
if( SDL_window != NULL )
display = SDL_GetWindowDisplayIndex( SDL_window );
if( SDL_GetDesktopDisplayMode( display, &desktopMode ) == 0 )
{
displayAspect = (float)desktopMode.w / (float)desktopMode.h;
ri.Printf( PRINT_ALL, "Display aspect: %.3f\n", displayAspect );
}
else
{
Com_Memset( &desktopMode, 0, sizeof( SDL_DisplayMode ) );
ri.Printf( PRINT_ALL,
"Cannot determine display aspect, assuming 1.333\n" );
}
ri.Printf (PRINT_ALL, "...setting mode %d:", mode );
if (mode == -2)
{
// use desktop video resolution
if( desktopMode.h > 0 )
{
glConfig.vidWidth = desktopMode.w;
glConfig.vidHeight = desktopMode.h;
}
else
{
glConfig.vidWidth = 640;
glConfig.vidHeight = 480;
ri.Printf( PRINT_ALL,
"Cannot determine display resolution, assuming 640x480\n" );
}
glConfig.windowAspect = (float)glConfig.vidWidth / (float)glConfig.vidHeight;
}
else 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);
// Center window
if( r_centerWindow->integer && !fullscreen )
{
x = ( desktopMode.w / 2 ) - ( glConfig.vidWidth / 2 );
y = ( desktopMode.h / 2 ) - ( glConfig.vidHeight / 2 );
}
// Destroy existing state if it exists
if( SDL_glContext != NULL )
{
SDL_GL_DeleteContext( SDL_glContext );
SDL_glContext = NULL;
}
if( SDL_window != NULL )
{
SDL_GetWindowPosition( SDL_window, &x, &y );
ri.Printf( PRINT_DEVELOPER, "Existing window at %dx%d before being destroyed\n", x, y );
SDL_DestroyWindow( SDL_window );
SDL_window = NULL;
}
if( fullscreen )
{
flags |= SDL_WINDOW_FULLSCREEN;
glConfig.isFullscreen = qtrue;
}
else
{
if( noborder )
flags |= SDL_WINDOW_BORDERLESS;
glConfig.isFullscreen = qfalse;
}
colorBits = r_colorbits->value;
if ((!colorBits) || (colorBits >= 32))
colorBits = 24;
if (!r_depthbits->value)
depthBits = 24;
else
depthBits = r_depthbits->value;
stencilBits = r_stencilbits->value;
samples = r_ext_multisample->value;
for (i = 0; i < 16; i++)
{
int testColorBits, testDepthBits, testStencilBits;
// 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;
}
}
testColorBits = colorBits;
testDepthBits = depthBits;
testStencilBits = stencilBits;
if ((i % 4) == 3)
{ // reduce colorBits
if (testColorBits == 24)
testColorBits = 16;
}
if ((i % 4) == 2)
{ // reduce depthBits
if (testDepthBits == 24)
testDepthBits = 16;
else if (testDepthBits == 16)
testDepthBits = 8;
}
if ((i % 4) == 1)
{ // reduce stencilBits
if (testStencilBits == 24)
testStencilBits = 16;
else if (testStencilBits == 16)
testStencilBits = 8;
else
testStencilBits = 0;
}
if (testColorBits == 24)
perChannelColorBits = 8;
else
perChannelColorBits = 4;
#ifdef __sgi /* Fix for SGIs grabbing too many bits of color */
if (perChannelColorBits == 4)
perChannelColorBits = 0; /* Use minimum size for 16-bit color */
/* Need alpha or else SGIs choose 36+ bit RGB mode */
SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 1);
#endif
SDL_GL_SetAttribute( SDL_GL_RED_SIZE, perChannelColorBits );
SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, perChannelColorBits );
SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, perChannelColorBits );
SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, testDepthBits );
SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, testStencilBits );
SDL_GL_SetAttribute( SDL_GL_MULTISAMPLEBUFFERS, samples ? 1 : 0 );
SDL_GL_SetAttribute( SDL_GL_MULTISAMPLESAMPLES, samples );
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 // if multisampling is enabled on X11, this causes create window to fail.
// If not allowing software GL, demand accelerated
if( !r_allowSoftwareGL->integer )
SDL_GL_SetAttribute( SDL_GL_ACCELERATED_VISUAL, 1 );
#endif
if( ( SDL_window = SDL_CreateWindow( CLIENT_WINDOW_TITLE, x, y,
glConfig.vidWidth, glConfig.vidHeight, flags ) ) == 0 )
{
ri.Printf( PRINT_DEVELOPER, "SDL_CreateWindow failed: %s\n", SDL_GetError( ) );
continue;
}
if( fullscreen )
{
SDL_DisplayMode mode;
switch( testColorBits )
{
case 16: mode.format = SDL_PIXELFORMAT_RGB565; break;
case 24: mode.format = SDL_PIXELFORMAT_RGB24; break;
default: ri.Printf( PRINT_DEVELOPER, "testColorBits is %d, can't fullscreen\n", testColorBits ); continue;
}
mode.w = glConfig.vidWidth;
mode.h = glConfig.vidHeight;
mode.refresh_rate = glConfig.displayFrequency = ri.Cvar_VariableIntegerValue( "r_displayRefresh" );
mode.driverdata = NULL;
if( SDL_SetWindowDisplayMode( SDL_window, &mode ) < 0 )
{
ri.Printf( PRINT_DEVELOPER, "SDL_SetWindowDisplayMode failed: %s\n", SDL_GetError( ) );
continue;
}
}
SDL_SetWindowIcon( SDL_window, icon );
if( ( SDL_glContext = SDL_GL_CreateContext( SDL_window ) ) == NULL )
{
ri.Printf( PRINT_DEVELOPER, "SDL_GL_CreateContext failed: %s\n", SDL_GetError( ) );
continue;
}
qglClearColor( 0, 0, 0, 1 );
qglClear( GL_COLOR_BUFFER_BIT );
SDL_GL_SwapWindow( SDL_window );
SDL_GL_SetSwapInterval( r_swapInterval->integer );
glConfig.colorBits = testColorBits;
glConfig.depthBits = testDepthBits;
glConfig.stencilBits = testStencilBits;
ri.Printf( PRINT_ALL, "Using %d color bits, %d depth, %d stencil display.\n",
glConfig.colorBits, glConfig.depthBits, glConfig.stencilBits );
break;
}
SDL_FreeSurface( icon );
if( !SDL_window )
{
ri.Printf( PRINT_ALL, "Couldn't get a visual\n" );
return RSERR_INVALID_MODE;
}
GLimp_DetectAvailableModes();
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, qboolean noborder)
{
rserr_t err;
if (!SDL_WasInit(SDL_INIT_VIDEO))
{
const char *driverName;
if (SDL_Init(SDL_INIT_VIDEO) == -1)
{
ri.Printf( PRINT_ALL, "SDL_Init( SDL_INIT_VIDEO ) FAILED (%s)\n", SDL_GetError());
return qfalse;
}
driverName = SDL_GetCurrentVideoDriver( );
ri.Printf( PRINT_ALL, "SDL using driver \"%s\"\n", driverName );
ri.Cvar_Set( "r_sdlDriver", driverName );
}
if (fullscreen && ri.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, noborder);
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;
}
static qboolean GLimp_HaveExtension(const char *ext)
{
const char *ptr = Q_stristr( glConfig.extensions_string, ext );
if (ptr == NULL)
return qfalse;
ptr += strlen(ext);
return ((*ptr == ' ') || (*ptr == '\0')); // verify it's complete string.
}
/*
===============
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" );
glConfig.textureCompression = TC_NONE;
// GL_EXT_texture_compression_s3tc
if ( GLimp_HaveExtension( "GL_ARB_texture_compression" ) &&
GLimp_HaveExtension( "GL_EXT_texture_compression_s3tc" ) )
{
if ( r_ext_compressed_textures->value )
{
glConfig.textureCompression = TC_S3TC_ARB;
ri.Printf( PRINT_ALL, "...using GL_EXT_texture_compression_s3tc\n" );
}
else
{
ri.Printf( PRINT_ALL, "...ignoring GL_EXT_texture_compression_s3tc\n" );
}
}
else
{
ri.Printf( PRINT_ALL, "...GL_EXT_texture_compression_s3tc not found\n" );
}
// GL_S3_s3tc ... legacy extension before GL_EXT_texture_compression_s3tc.
if (glConfig.textureCompression == TC_NONE)
{
if ( GLimp_HaveExtension( "GL_S3_s3tc" ) )
{
if ( r_ext_compressed_textures->value )
{
glConfig.textureCompression = TC_S3TC;
ri.Printf( PRINT_ALL, "...using GL_S3_s3tc\n" );
}
else
{
ri.Printf( PRINT_ALL, "...ignoring GL_S3_s3tc\n" );
}
}
else
{
ri.Printf( PRINT_ALL, "...GL_S3_s3tc not found\n" );
}
}
// GL_EXT_texture_env_add
glConfig.textureEnvAddAvailable = qfalse;
if ( GLimp_HaveExtension( "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 ( GLimp_HaveExtension( "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 ( GLimp_HaveExtension( "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 ( GLimp_HaveExtension( "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 )
{
ri.Printf( PRINT_DEVELOPER, "Glimp_Init( )\n" );
r_allowSoftwareGL = ri.Cvar_Get( "r_allowSoftwareGL", "0", CVAR_LATCH );
r_sdlDriver = ri.Cvar_Get( "r_sdlDriver", "", CVAR_ROM );
r_allowResize = ri.Cvar_Get( "r_allowResize", "0", CVAR_ARCHIVE | CVAR_LATCH );
r_centerWindow = ri.Cvar_Get( "r_centerWindow", "0", CVAR_ARCHIVE | CVAR_LATCH );
if( ri.Cvar_VariableIntegerValue( "com_abnormalExit" ) )
{
ri.Cvar_Set( "r_mode", va( "%d", R_MODE_FALLBACK ) );
ri.Cvar_Set( "r_fullscreen", "0" );
ri.Cvar_Set( "r_centerWindow", "0" );
ri.Cvar_Set( "com_abnormalExit", "0" );
}
ri.Sys_GLimpInit( );
// Create the window and set up the context
if(GLimp_StartDriverAndSetMode(r_mode->integer, r_fullscreen->integer, r_noborder->integer))
goto success;
// Try again, this time in a platform specific "safe mode"
ri.Sys_GLimpSafeInit( );
if(GLimp_StartDriverAndSetMode(r_mode->integer, r_fullscreen->integer, qfalse))
goto success;
// Finally, try the default screen resolution
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, qfalse, qfalse))
goto success;
}
// Nothing worked, give up
ri.Error( ERR_FATAL, "GLimp_Init() - could not load OpenGL subsystem" );
success:
// These values force the UI to disable driver selection
glConfig.driverType = GLDRV_ICD;
glConfig.hardwareType = GLHW_GENERIC;
// Only using SDL_SetWindowBrightness to determine if hardware gamma is supported
glConfig.deviceSupportsGamma = !r_ignorehwgamma->integer &&
SDL_SetWindowBrightness( SDL_window, 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
ri.IN_Init( SDL_window );
}
/*
===============
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_SwapWindow( SDL_window );
}
if( r_fullscreen->modified )
{
int fullscreen;
qboolean needToToggle;
qboolean sdlToggled = qfalse;
// Find out the current state
fullscreen = !!( SDL_GetWindowFlags( SDL_window ) & SDL_WINDOW_FULLSCREEN );
if( r_fullscreen->integer && ri.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?
needToToggle = !!r_fullscreen->integer != fullscreen;
if( needToToggle )
{
sdlToggled = SDL_SetWindowFullscreen( SDL_window, r_fullscreen->integer ) >= 0;
// SDL_WM_ToggleFullScreen didn't work, so do it the slow way
if( !sdlToggled )
ri.Cmd_ExecuteText(EXEC_APPEND, "vid_restart\n");
ri.IN_Restart( );
}
r_fullscreen->modified = qfalse;
}
}
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