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ioq3/code/sdl/sdl_glimp.c
Thomas Köppe d1b7ab6b22 [sdl] Turn tentative definition into actual definition. 
There is no need for a tentative definition in this case. By providing
an explicit initializer, the resulting definition has the same effect
as before, but is no longer tentative. This avoids easy errors
resulting from multiple tentative definitions in different translation
units. (Previous compilers permitted those common errors, but GCC 10
rejects them by default.)
2020-11-17 18:08:13 +00:00

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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;
int qglMajorVersion, qglMinorVersion;
int qglesMajorVersion, qglesMinorVersion;
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);
#define GLE(ret, name, ...) name##proc * qgl##name = NULL;
QGL_1_1_PROCS;
QGL_1_1_FIXED_FUNCTION_PROCS;
QGL_DESKTOP_1_1_PROCS;
QGL_DESKTOP_1_1_FIXED_FUNCTION_PROCS;
QGL_ES_1_1_PROCS;
QGL_ES_1_1_FIXED_FUNCTION_PROCS;
QGL_1_3_PROCS;
QGL_1_5_PROCS;
QGL_2_0_PROCS;
QGL_3_0_PROCS;
QGL_ARB_occlusion_query_PROCS;
QGL_ARB_framebuffer_object_PROCS;
QGL_ARB_vertex_array_object_PROCS;
QGL_EXT_direct_state_access_PROCS;
#undef GLE
/*
===============
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 };
int numSDLModes;
SDL_Rect *modes;
int numModes = 0;
SDL_DisplayMode windowMode;
int display = SDL_GetWindowDisplayIndex( SDL_window );
if( display < 0 )
{
ri.Printf( PRINT_WARNING, "Couldn't get window display index, no resolutions detected: %s\n", SDL_GetError() );
return;
}
numSDLModes = SDL_GetNumDisplayModes( display );
if( SDL_GetWindowDisplayMode( SDL_window, &windowMode ) < 0 || numSDLModes <= 0 )
{
ri.Printf( PRINT_WARNING, "Couldn't get window display mode, no resolutions detected: %s\n", SDL_GetError() );
return;
}
modes = SDL_calloc( (size_t)numSDLModes, sizeof( SDL_Rect ) );
if ( !modes )
{
ri.Error( ERR_FATAL, "Out of memory" );
}
for( i = 0; i < numSDLModes; 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" );
SDL_free( modes );
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 );
}
SDL_free( modes );
}
/*
===============
GLimp_GetProcAddresses
Get addresses for OpenGL functions.
===============
*/
static qboolean GLimp_GetProcAddresses( qboolean fixedFunction ) {
qboolean success = qtrue;
const char *version;
#ifdef __SDL_NOGETPROCADDR__
#define GLE( ret, name, ... ) qgl##name = gl#name;
#else
#define GLE( ret, name, ... ) qgl##name = (name##proc *) SDL_GL_GetProcAddress("gl" #name); \
if ( qgl##name == NULL ) { \
ri.Printf( PRINT_ALL, "ERROR: Missing OpenGL function %s\n", "gl" #name ); \
success = qfalse; \
}
#endif
// OpenGL 1.0 and OpenGL ES 1.0
GLE(const GLubyte *, GetString, GLenum name)
if ( !qglGetString ) {
Com_Error( ERR_FATAL, "glGetString is NULL" );
}
version = (const char *)qglGetString( GL_VERSION );
if ( !version ) {
Com_Error( ERR_FATAL, "GL_VERSION is NULL" );
}
if ( Q_stricmpn( "OpenGL ES", version, 9 ) == 0 ) {
char profile[6]; // ES, ES-CM, or ES-CL
sscanf( version, "OpenGL %5s %d.%d", profile, &qglesMajorVersion, &qglesMinorVersion );
// common lite profile (no floating point) is not supported
if ( Q_stricmp( profile, "ES-CL" ) == 0 ) {
qglesMajorVersion = 0;
qglesMinorVersion = 0;
}
} else {
sscanf( version, "%d.%d", &qglMajorVersion, &qglMinorVersion );
}
if ( fixedFunction ) {
if ( QGL_VERSION_ATLEAST( 1, 1 ) ) {
QGL_1_1_PROCS;
QGL_1_1_FIXED_FUNCTION_PROCS;
QGL_DESKTOP_1_1_PROCS;
QGL_DESKTOP_1_1_FIXED_FUNCTION_PROCS;
} else if ( qglesMajorVersion == 1 && qglesMinorVersion >= 1 ) {
// OpenGL ES 1.1 (2.0 is not backward compatible)
QGL_1_1_PROCS;
QGL_1_1_FIXED_FUNCTION_PROCS;
QGL_ES_1_1_PROCS;
QGL_ES_1_1_FIXED_FUNCTION_PROCS;
// error so this doesn't segfault due to NULL desktop GL functions being used
Com_Error( ERR_FATAL, "Unsupported OpenGL Version: %s", version );
} else {
Com_Error( ERR_FATAL, "Unsupported OpenGL Version (%s), OpenGL 1.1 is required", version );
}
} else {
if ( QGL_VERSION_ATLEAST( 2, 0 ) ) {
QGL_1_1_PROCS;
QGL_DESKTOP_1_1_PROCS;
QGL_1_3_PROCS;
QGL_1_5_PROCS;
QGL_2_0_PROCS;
} else if ( QGLES_VERSION_ATLEAST( 2, 0 ) ) {
QGL_1_1_PROCS;
QGL_ES_1_1_PROCS;
QGL_1_3_PROCS;
QGL_1_5_PROCS;
QGL_2_0_PROCS;
// error so this doesn't segfault due to NULL desktop GL functions being used
Com_Error( ERR_FATAL, "Unsupported OpenGL Version: %s", version );
} else {
Com_Error( ERR_FATAL, "Unsupported OpenGL Version (%s), OpenGL 2.0 is required", version );
}
}
if ( QGL_VERSION_ATLEAST( 3, 0 ) || QGLES_VERSION_ATLEAST( 3, 0 ) ) {
QGL_3_0_PROCS;
}
#undef GLE
return success;
}
/*
===============
GLimp_ClearProcAddresses
Clear addresses for OpenGL functions.
===============
*/
static void GLimp_ClearProcAddresses( void ) {
#define GLE( ret, name, ... ) qgl##name = NULL;
qglMajorVersion = 0;
qglMinorVersion = 0;
qglesMajorVersion = 0;
qglesMinorVersion = 0;
QGL_1_1_PROCS;
QGL_1_1_FIXED_FUNCTION_PROCS;
QGL_DESKTOP_1_1_PROCS;
QGL_DESKTOP_1_1_FIXED_FUNCTION_PROCS;
QGL_ES_1_1_PROCS;
QGL_ES_1_1_FIXED_FUNCTION_PROCS;
QGL_1_3_PROCS;
QGL_1_5_PROCS;
QGL_2_0_PROCS;
QGL_3_0_PROCS;
QGL_ARB_occlusion_query_PROCS;
QGL_ARB_framebuffer_object_PROCS;
QGL_ARB_vertex_array_object_PROCS;
QGL_EXT_direct_state_access_PROCS;
qglActiveTextureARB = NULL;
qglClientActiveTextureARB = NULL;
qglMultiTexCoord2fARB = NULL;
qglLockArraysEXT = NULL;
qglUnlockArraysEXT = NULL;
#undef GLE
}
/*
===============
GLimp_SetMode
===============
*/
static int GLimp_SetMode(int mode, qboolean fullscreen, qboolean noborder, qboolean fixedFunction)
{
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( display < 0 )
{
ri.Printf( PRINT_DEVELOPER, "SDL_GetWindowDisplayIndex() failed: %s\n", SDL_GetError() );
}
}
if( display >= 0 && 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 )
{
GLimp_ClearProcAddresses();
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;
int realColorBits[3];
// 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 ) ) == NULL )
{
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 (!fixedFunction)
{
int profileMask, majorVersion, minorVersion;
SDL_GL_GetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, &profileMask);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &majorVersion);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, &minorVersion);
ri.Printf(PRINT_ALL, "Trying to get an OpenGL 3.2 core context\n");
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
if ((SDL_glContext = SDL_GL_CreateContext(SDL_window)) == NULL)
{
ri.Printf(PRINT_ALL, "SDL_GL_CreateContext failed: %s\n", SDL_GetError());
ri.Printf(PRINT_ALL, "Reverting to default context\n");
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, profileMask);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, majorVersion);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, minorVersion);
}
else
{
const char *renderer;
ri.Printf(PRINT_ALL, "SDL_GL_CreateContext succeeded.\n");
if ( GLimp_GetProcAddresses( fixedFunction ) )
{
renderer = (const char *)qglGetString(GL_RENDERER);
}
else
{
ri.Printf( PRINT_ALL, "GLimp_GetProcAddresses() failed for OpenGL 3.2 core context\n" );
renderer = NULL;
}
if (!renderer || (strstr(renderer, "Software Renderer") || strstr(renderer, "Software Rasterizer")))
{
if ( renderer )
ri.Printf(PRINT_ALL, "GL_RENDERER is %s, rejecting context\n", renderer);
GLimp_ClearProcAddresses();
SDL_GL_DeleteContext(SDL_glContext);
SDL_glContext = NULL;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, profileMask);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, majorVersion);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, minorVersion);
}
}
}
else
{
SDL_glContext = NULL;
}
if ( !SDL_glContext )
{
if( ( SDL_glContext = SDL_GL_CreateContext( SDL_window ) ) == NULL )
{
ri.Printf( PRINT_DEVELOPER, "SDL_GL_CreateContext failed: %s\n", SDL_GetError( ) );
SDL_DestroyWindow( SDL_window );
SDL_window = NULL;
continue;
}
if ( !GLimp_GetProcAddresses( fixedFunction ) )
{
ri.Printf( PRINT_ALL, "GLimp_GetProcAddresses() failed\n" );
GLimp_ClearProcAddresses();
SDL_GL_DeleteContext( SDL_glContext );
SDL_glContext = NULL;
SDL_DestroyWindow( SDL_window );
SDL_window = NULL;
continue;
}
}
qglClearColor( 0, 0, 0, 1 );
qglClear( GL_COLOR_BUFFER_BIT );
SDL_GL_SwapWindow( SDL_window );
if( SDL_GL_SetSwapInterval( r_swapInterval->integer ) == -1 )
{
ri.Printf( PRINT_DEVELOPER, "SDL_GL_SetSwapInterval failed: %s\n", SDL_GetError( ) );
}
SDL_GL_GetAttribute( SDL_GL_RED_SIZE, &realColorBits[0] );
SDL_GL_GetAttribute( SDL_GL_GREEN_SIZE, &realColorBits[1] );
SDL_GL_GetAttribute( SDL_GL_BLUE_SIZE, &realColorBits[2] );
SDL_GL_GetAttribute( SDL_GL_DEPTH_SIZE, &glConfig.depthBits );
SDL_GL_GetAttribute( SDL_GL_STENCIL_SIZE, &glConfig.stencilBits );
glConfig.colorBits = realColorBits[0] + realColorBits[1] + realColorBits[2];
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, qboolean gl3Core)
{
rserr_t err;
if (!SDL_WasInit(SDL_INIT_VIDEO))
{
const char *driverName;
if (SDL_Init(SDL_INIT_VIDEO) != 0)
{
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, gl3Core);
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( qboolean fixedFunction )
{
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 ( SDL_GL_ExtensionSupported( "GL_ARB_texture_compression" ) &&
SDL_GL_ExtensionSupported( "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 ( SDL_GL_ExtensionSupported( "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" );
}
}
// OpenGL 1 fixed function pipeline
if ( fixedFunction )
{
// GL_EXT_texture_env_add
glConfig.textureEnvAddAvailable = qfalse;
if ( SDL_GL_ExtensionSupported( "GL_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 ( SDL_GL_ExtensionSupported( "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 ( SDL_GL_ExtensionSupported( "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 ( SDL_GL_ExtensionSupported( "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" );
}
haveClampToEdge = qfalse;
if ( QGL_VERSION_ATLEAST( 1, 2 ) || QGLES_VERSION_ATLEAST( 1, 0 ) || SDL_GL_ExtensionSupported( "GL_SGIS_texture_edge_clamp" ) )
{
ri.Printf( PRINT_ALL, "...using GL_SGIS_texture_edge_clamp\n" );
haveClampToEdge = qtrue;
}
else
{
ri.Printf( PRINT_ALL, "...GL_SGIS_texture_edge_clamp 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( qboolean fixedFunction )
{
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, fixedFunction))
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, fixedFunction))
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, fixedFunction))
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 ) );
// manually create extension list if using OpenGL 3
if ( qglGetStringi )
{
int i, numExtensions, extensionLength, listLength;
const char *extension;
qglGetIntegerv( GL_NUM_EXTENSIONS, &numExtensions );
listLength = 0;
for ( i = 0; i < numExtensions; i++ )
{
extension = (char *) qglGetStringi( GL_EXTENSIONS, i );
extensionLength = strlen( extension );
if ( ( listLength + extensionLength + 1 ) >= sizeof( glConfig.extensions_string ) )
break;
if ( i > 0 ) {
Q_strcat( glConfig.extensions_string, sizeof( glConfig.extensions_string ), " " );
listLength++;
}
Q_strcat( glConfig.extensions_string, sizeof( glConfig.extensions_string ), extension );
listLength += extensionLength;
}
}
else
{
Q_strncpyz( glConfig.extensions_string, (char *) qglGetString (GL_EXTENSIONS), sizeof( glConfig.extensions_string ) );
}
// initialize extensions
GLimp_InitExtensions( fixedFunction );
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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