SDL_x11opengl.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_X11
#include "SDL_x11video.h"
#include "SDL_assert.h"
#include "SDL_hints.h"
/* GLX implementation of SDL OpenGL support */
#if SDL_VIDEO_OPENGL_GLX
#include "SDL_loadso.h"
#include "SDL_x11opengles.h"
#if defined(__IRIX__)
/* IRIX doesn't have a GL library versioning system */
#define DEFAULT_OPENGL "libGL.so"
#elif defined(__MACOSX__)
#define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib"
#elif defined(__QNXNTO__)
#define DEFAULT_OPENGL "libGL.so.3"
#else
#define DEFAULT_OPENGL "libGL.so.1"
#endif
#ifndef GLX_NONE_EXT
#define GLX_NONE_EXT 0x8000
#endif
#ifndef GLX_ARB_multisample
#define GLX_ARB_multisample
#define GLX_SAMPLE_BUFFERS_ARB 100000
#define GLX_SAMPLES_ARB 100001
#endif
#ifndef GLX_EXT_visual_rating
#define GLX_EXT_visual_rating
#define GLX_VISUAL_CAVEAT_EXT 0x20
#define GLX_NONE_EXT 0x8000
#define GLX_SLOW_VISUAL_EXT 0x8001
#define GLX_NON_CONFORMANT_VISUAL_EXT 0x800D
#endif
#ifndef GLX_EXT_visual_info
#define GLX_EXT_visual_info
#define GLX_X_VISUAL_TYPE_EXT 0x22
#define GLX_DIRECT_COLOR_EXT 0x8003
#endif
#ifndef GLX_ARB_create_context
#define GLX_ARB_create_context
#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
#define GLX_CONTEXT_FLAGS_ARB 0x2094
#define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
/* Typedef for the GL 3.0 context creation function */
typedef GLXContext(*PFNGLXCREATECONTEXTATTRIBSARBPROC) (Display * dpy,
GLXFBConfig config,
GLXContext
share_context,
Bool direct,
const int
*attrib_list);
#endif
#ifndef GLX_ARB_create_context_profile
#define GLX_ARB_create_context_profile
#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
#endif
#ifndef GLX_ARB_create_context_robustness
#define GLX_ARB_create_context_robustness
#define GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB 0x00000004
#define GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
#define GLX_NO_RESET_NOTIFICATION_ARB 0x8261
#define GLX_LOSE_CONTEXT_ON_RESET_ARB 0x8252
#endif
#ifndef GLX_EXT_create_context_es2_profile
#define GLX_EXT_create_context_es2_profile
#ifndef GLX_CONTEXT_ES2_PROFILE_BIT_EXT
#define GLX_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000002
#endif
#endif
#ifndef GLX_ARB_framebuffer_sRGB
#define GLX_ARB_framebuffer_sRGB
#ifndef GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB
#define GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20B2
#endif
#endif
#ifndef GLX_ARB_create_context_no_error
#define GLX_ARB_create_context_no_error
#ifndef GLX_CONTEXT_OPENGL_NO_ERROR_ARB
#define GLX_CONTEXT_OPENGL_NO_ERROR_ARB 0x31B3
#endif
#endif
#ifndef GLX_EXT_swap_control
#define GLX_SWAP_INTERVAL_EXT 0x20F1
#define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
#endif
#ifndef GLX_EXT_swap_control_tear
#define GLX_LATE_SWAPS_TEAR_EXT 0x20F3
#endif
#ifndef GLX_ARB_context_flush_control
#define GLX_ARB_context_flush_control
#define GLX_CONTEXT_RELEASE_BEHAVIOR_ARB 0x2097
#define GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB 0x0000
#define GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB 0x2098
#endif
#define OPENGL_REQUIRES_DLOPEN
#if defined(OPENGL_REQUIRES_DLOPEN) && defined(SDL_LOADSO_DLOPEN)
#include <dlfcn.h>
#define GL_LoadObject(X) dlopen(X, (RTLD_NOW|RTLD_GLOBAL))
#define GL_LoadFunction dlsym
#define GL_UnloadObject dlclose
#else
#define GL_LoadObject SDL_LoadObject
#define GL_LoadFunction SDL_LoadFunction
#define GL_UnloadObject SDL_UnloadObject
#endif
static void X11_GL_InitExtensions(_THIS);
int
X11_GL_LoadLibrary(_THIS, const char *path)
{
Display *display;
void *handle;
if (_this->gl_data) {
return SDL_SetError("OpenGL context already created");
}
/* Load the OpenGL library */
if (path == NULL) {
path = SDL_getenv("SDL_OPENGL_LIBRARY");
}
if (path == NULL) {
path = DEFAULT_OPENGL;
}
_this->gl_config.dll_handle = GL_LoadObject(path);
if (!_this->gl_config.dll_handle) {
#if defined(OPENGL_REQUIRES_DLOPEN) && defined(SDL_LOADSO_DLOPEN)
SDL_SetError("Failed loading %s: %s", path, dlerror());
#endif
return -1;
}
SDL_strlcpy(_this->gl_config.driver_path, path,
SDL_arraysize(_this->gl_config.driver_path));
/* Allocate OpenGL memory */
_this->gl_data =
(struct SDL_GLDriverData *) SDL_calloc(1,
sizeof(struct
SDL_GLDriverData));
if (!_this->gl_data) {
return SDL_OutOfMemory();
}
/* Load function pointers */
handle = _this->gl_config.dll_handle;
_this->gl_data->glXQueryExtension =
(Bool (*)(Display *, int *, int *))
GL_LoadFunction(handle, "glXQueryExtension");
_this->gl_data->glXGetProcAddress =
(void *(*)(const GLubyte *))
GL_LoadFunction(handle, "glXGetProcAddressARB");
_this->gl_data->glXChooseVisual =
(XVisualInfo * (*)(Display *, int, int *))
X11_GL_GetProcAddress(_this, "glXChooseVisual");
_this->gl_data->glXCreateContext =
(GLXContext(*)(Display *, XVisualInfo *, GLXContext, int))
X11_GL_GetProcAddress(_this, "glXCreateContext");
_this->gl_data->glXDestroyContext =
(void (*)(Display *, GLXContext))
X11_GL_GetProcAddress(_this, "glXDestroyContext");
_this->gl_data->glXMakeCurrent =
(int (*)(Display *, GLXDrawable, GLXContext))
X11_GL_GetProcAddress(_this, "glXMakeCurrent");
_this->gl_data->glXSwapBuffers =
(void (*)(Display *, GLXDrawable))
X11_GL_GetProcAddress(_this, "glXSwapBuffers");
_this->gl_data->glXQueryDrawable =
(void (*)(Display*,GLXDrawable,int,unsigned int*))
X11_GL_GetProcAddress(_this, "glXQueryDrawable");
if (!_this->gl_data->glXQueryExtension ||
!_this->gl_data->glXChooseVisual ||
!_this->gl_data->glXCreateContext ||
!_this->gl_data->glXDestroyContext ||
!_this->gl_data->glXMakeCurrent ||
!_this->gl_data->glXSwapBuffers) {
return SDL_SetError("Could not retrieve OpenGL functions");
}
display = ((SDL_VideoData *) _this->driverdata)->display;
if (!_this->gl_data->glXQueryExtension(display, &_this->gl_data->errorBase, &_this->gl_data->eventBase)) {
return SDL_SetError("GLX is not supported");
}
/* Initialize extensions */
/* See lengthy comment about the inc/dec in
../windows/SDL_windowsopengl.c. */
++_this->gl_config.driver_loaded;
X11_GL_InitExtensions(_this);
--_this->gl_config.driver_loaded;
/* If we need a GL ES context and there's no
* GLX_EXT_create_context_es2_profile extension, switch over to X11_GLES functions
*/
if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES &&
X11_GL_UseEGL(_this) ) {
#if SDL_VIDEO_OPENGL_EGL
X11_GL_UnloadLibrary(_this);
/* Better avoid conflicts! */
if (_this->gl_config.dll_handle != NULL ) {
GL_UnloadObject(_this->gl_config.dll_handle);
_this->gl_config.dll_handle = NULL;
}
_this->GL_LoadLibrary = X11_GLES_LoadLibrary;
_this->GL_GetProcAddress = X11_GLES_GetProcAddress;
_this->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
_this->GL_CreateContext = X11_GLES_CreateContext;
_this->GL_MakeCurrent = X11_GLES_MakeCurrent;
_this->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
_this->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
_this->GL_SwapWindow = X11_GLES_SwapWindow;
_this->GL_DeleteContext = X11_GLES_DeleteContext;
return X11_GLES_LoadLibrary(_this, NULL);
#else
return SDL_SetError("SDL not configured with EGL support");
#endif
}
return 0;
}
void *
X11_GL_GetProcAddress(_THIS, const char *proc)
{
if (_this->gl_data->glXGetProcAddress) {
return _this->gl_data->glXGetProcAddress((const GLubyte *) proc);
}
return GL_LoadFunction(_this->gl_config.dll_handle, proc);
}
void
X11_GL_UnloadLibrary(_THIS)
{
/* Don't actually unload the library, since it may have registered
* X11 shutdown hooks, per the notes at:
* http://dri.sourceforge.net/doc/DRIuserguide.html
*/
#if 0
GL_UnloadObject(_this->gl_config.dll_handle);
_this->gl_config.dll_handle = NULL;
#endif
/* Free OpenGL memory */
SDL_free(_this->gl_data);
_this->gl_data = NULL;
}
static SDL_bool
HasExtension(const char *extension, const char *extensions)
{
const char *start;
const char *where, *terminator;
if (!extensions)
return SDL_FALSE;
/* Extension names should not have spaces. */
where = SDL_strchr(extension, ' ');
if (where || *extension == '\0')
return SDL_FALSE;
/* It takes a bit of care to be fool-proof about parsing the
* OpenGL extensions string. Don't be fooled by sub-strings,
* etc. */
start = extensions;
for (;;) {
where = SDL_strstr(start, extension);
if (!where)
break;
terminator = where + SDL_strlen(extension);
if (where == start || *(where - 1) == ' ')
if (*terminator == ' ' || *terminator == '\0')
return SDL_TRUE;
start = terminator;
}
return SDL_FALSE;
}
static void
X11_GL_InitExtensions(_THIS)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
const int screen = DefaultScreen(display);
XVisualInfo *vinfo = NULL;
Window w = 0;
GLXContext prev_ctx = 0;
GLXDrawable prev_drawable = 0;
GLXContext context = 0;
const char *(*glXQueryExtensionsStringFunc) (Display *, int);
const char *extensions;
vinfo = X11_GL_GetVisual(_this, display, screen);
if (vinfo) {
GLXContext (*glXGetCurrentContextFunc) (void) =
(GLXContext(*)(void))
X11_GL_GetProcAddress(_this, "glXGetCurrentContext");
GLXDrawable (*glXGetCurrentDrawableFunc) (void) =
(GLXDrawable(*)(void))
X11_GL_GetProcAddress(_this, "glXGetCurrentDrawable");
if (glXGetCurrentContextFunc && glXGetCurrentDrawableFunc) {
XSetWindowAttributes xattr;
prev_ctx = glXGetCurrentContextFunc();
prev_drawable = glXGetCurrentDrawableFunc();
xattr.background_pixel = 0;
xattr.border_pixel = 0;
xattr.colormap =
X11_XCreateColormap(display, RootWindow(display, screen),
vinfo->visual, AllocNone);
w = X11_XCreateWindow(display, RootWindow(display, screen), 0, 0,
32, 32, 0, vinfo->depth, InputOutput, vinfo->visual,
(CWBackPixel | CWBorderPixel | CWColormap), &xattr);
context = _this->gl_data->glXCreateContext(display, vinfo,
NULL, True);
if (context) {
_this->gl_data->glXMakeCurrent(display, w, context);
}
}
X11_XFree(vinfo);
}
glXQueryExtensionsStringFunc =
(const char *(*)(Display *, int)) X11_GL_GetProcAddress(_this,
"glXQueryExtensionsString");
if (glXQueryExtensionsStringFunc) {
extensions = glXQueryExtensionsStringFunc(display, screen);
} else {
extensions = NULL;
}
/* Check for GLX_EXT_swap_control(_tear) */
_this->gl_data->HAS_GLX_EXT_swap_control_tear = SDL_FALSE;
if (HasExtension("GLX_EXT_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalEXT =
(void (*)(Display*,GLXDrawable,int))
X11_GL_GetProcAddress(_this, "glXSwapIntervalEXT");
if (HasExtension("GLX_EXT_swap_control_tear", extensions)) {
_this->gl_data->HAS_GLX_EXT_swap_control_tear = SDL_TRUE;
}
}
/* Check for GLX_MESA_swap_control */
if (HasExtension("GLX_MESA_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalMESA =
(int(*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalMESA");
_this->gl_data->glXGetSwapIntervalMESA =
(int(*)(void)) X11_GL_GetProcAddress(_this,
"glXGetSwapIntervalMESA");
}
/* Check for GLX_SGI_swap_control */
if (HasExtension("GLX_SGI_swap_control", extensions)) {
_this->gl_data->glXSwapIntervalSGI =
(int (*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalSGI");
}
/* Check for GLX_ARB_create_context */
if (HasExtension("GLX_ARB_create_context", extensions)) {
_this->gl_data->glXCreateContextAttribsARB =
(GLXContext (*)(Display*,GLXFBConfig,GLXContext,Bool,const int *))
X11_GL_GetProcAddress(_this, "glXCreateContextAttribsARB");
_this->gl_data->glXChooseFBConfig =
(GLXFBConfig *(*)(Display *, int, const int *, int *))
X11_GL_GetProcAddress(_this, "glXChooseFBConfig");
}
/* Check for GLX_EXT_visual_rating */
if (HasExtension("GLX_EXT_visual_rating", extensions)) {
_this->gl_data->HAS_GLX_EXT_visual_rating = SDL_TRUE;
}
/* Check for GLX_EXT_visual_info */
if (HasExtension("GLX_EXT_visual_info", extensions)) {
_this->gl_data->HAS_GLX_EXT_visual_info = SDL_TRUE;
}
/* Check for GLX_EXT_create_context_es2_profile */
if (HasExtension("GLX_EXT_create_context_es2_profile", extensions)) {
/* this wants to call glGetString(), so it needs a context. */
/* !!! FIXME: it would be nice not to make a context here though! */
if (context) {
SDL_GL_DeduceMaxSupportedESProfile(
&_this->gl_data->es_profile_max_supported_version.major,
&_this->gl_data->es_profile_max_supported_version.minor
);
}
}
/* Check for GLX_ARB_context_flush_control */
if (HasExtension("GLX_ARB_context_flush_control", extensions)) {
_this->gl_data->HAS_GLX_ARB_context_flush_control = SDL_TRUE;
}
/* Check for GLX_ARB_create_context_robustness */
if (HasExtension("GLX_ARB_create_context_robustness", extensions)) {
_this->gl_data->HAS_GLX_ARB_create_context_robustness = SDL_TRUE;
}
/* Check for GLX_ARB_create_context_no_error */
if (HasExtension("GLX_ARB_create_context_no_error", extensions)) {
_this->gl_data->HAS_GLX_ARB_create_context_no_error = SDL_TRUE;
}
if (context) {
_this->gl_data->glXMakeCurrent(display, None, NULL);
_this->gl_data->glXDestroyContext(display, context);
if (prev_ctx && prev_drawable) {
_this->gl_data->glXMakeCurrent(display, prev_drawable, prev_ctx);
}
}
if (w) {
X11_XDestroyWindow(display, w);
}
X11_PumpEvents(_this);
}
/* glXChooseVisual and glXChooseFBConfig have some small differences in
* the attribute encoding, it can be chosen with the for_FBConfig parameter.
* Some targets fail if you use GLX_X_VISUAL_TYPE_EXT/GLX_DIRECT_COLOR_EXT,
* so it gets specified last if used and is pointed to by *_pvistypeattr.
* In case of failure, if that pointer is not NULL, set that pointer to None
* and try again.
*/
static int
X11_GL_GetAttributes(_THIS, Display * display, int screen, int * attribs, int size, Bool for_FBConfig, int **_pvistypeattr)
{
int i = 0;
const int MAX_ATTRIBUTES = 64;
int *pvistypeattr = NULL;
/* assert buffer is large enough to hold all SDL attributes. */
SDL_assert(size >= MAX_ATTRIBUTES);
/* Setup our GLX attributes according to the gl_config. */
if( for_FBConfig ) {
attribs[i++] = GLX_RENDER_TYPE;
attribs[i++] = GLX_RGBA_BIT;
} else {
attribs[i++] = GLX_RGBA;
}
attribs[i++] = GLX_RED_SIZE;
attribs[i++] = _this->gl_config.red_size;
attribs[i++] = GLX_GREEN_SIZE;
attribs[i++] = _this->gl_config.green_size;
attribs[i++] = GLX_BLUE_SIZE;
attribs[i++] = _this->gl_config.blue_size;
if (_this->gl_config.alpha_size) {
attribs[i++] = GLX_ALPHA_SIZE;
attribs[i++] = _this->gl_config.alpha_size;
}
if (_this->gl_config.double_buffer) {
attribs[i++] = GLX_DOUBLEBUFFER;
if( for_FBConfig ) {
attribs[i++] = True;
}
}
attribs[i++] = GLX_DEPTH_SIZE;
attribs[i++] = _this->gl_config.depth_size;
if (_this->gl_config.stencil_size) {
attribs[i++] = GLX_STENCIL_SIZE;
attribs[i++] = _this->gl_config.stencil_size;
}
if (_this->gl_config.accum_red_size) {
attribs[i++] = GLX_ACCUM_RED_SIZE;
attribs[i++] = _this->gl_config.accum_red_size;
}
if (_this->gl_config.accum_green_size) {
attribs[i++] = GLX_ACCUM_GREEN_SIZE;
attribs[i++] = _this->gl_config.accum_green_size;
}
if (_this->gl_config.accum_blue_size) {
attribs[i++] = GLX_ACCUM_BLUE_SIZE;
attribs[i++] = _this->gl_config.accum_blue_size;
}
if (_this->gl_config.accum_alpha_size) {
attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
attribs[i++] = _this->gl_config.accum_alpha_size;
}
if (_this->gl_config.stereo) {
attribs[i++] = GLX_STEREO;
if( for_FBConfig ) {
attribs[i++] = True;
}
}
if (_this->gl_config.multisamplebuffers) {
attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
attribs[i++] = _this->gl_config.multisamplebuffers;
}
if (_this->gl_config.multisamplesamples) {
attribs[i++] = GLX_SAMPLES_ARB;
attribs[i++] = _this->gl_config.multisamplesamples;
}
if (_this->gl_config.framebuffer_srgb_capable) {
attribs[i++] = GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB;
attribs[i++] = True; /* always needed, for_FBConfig or not! */
}
if (_this->gl_config.accelerated >= 0 &&
_this->gl_data->HAS_GLX_EXT_visual_rating) {
attribs[i++] = GLX_VISUAL_CAVEAT_EXT;
attribs[i++] = _this->gl_config.accelerated ? GLX_NONE_EXT :
GLX_SLOW_VISUAL_EXT;
}
/* If we're supposed to use DirectColor visuals, and we've got the
EXT_visual_info extension, then add GLX_X_VISUAL_TYPE_EXT. */
if (X11_UseDirectColorVisuals() &&
_this->gl_data->HAS_GLX_EXT_visual_info) {
pvistypeattr = &attribs[i];
attribs[i++] = GLX_X_VISUAL_TYPE_EXT;
attribs[i++] = GLX_DIRECT_COLOR_EXT;
}
attribs[i++] = None;
SDL_assert(i <= MAX_ATTRIBUTES);
if (_pvistypeattr) {
*_pvistypeattr = pvistypeattr;
}
return i;
}
XVisualInfo *
X11_GL_GetVisual(_THIS, Display * display, int screen)
{
/* 64 seems nice. */
int attribs[64];
XVisualInfo *vinfo;
int *pvistypeattr = NULL;
if (!_this->gl_data) {
/* The OpenGL library wasn't loaded, SDL_GetError() should have info */
return NULL;
}
X11_GL_GetAttributes(_this, display, screen, attribs, 64, SDL_FALSE, &pvistypeattr);
vinfo = _this->gl_data->glXChooseVisual(display, screen, attribs);
if (!vinfo && (pvistypeattr != NULL)) {
*pvistypeattr = None;
vinfo = _this->gl_data->glXChooseVisual(display, screen, attribs);
}
if (!vinfo) {
SDL_SetError("Couldn't find matching GLX visual");
}
return vinfo;
}
static int (*handler) (Display *, XErrorEvent *) = NULL;
static const char *errorHandlerOperation = NULL;
static int errorBase = 0;
static int errorCode = 0;
static int
X11_GL_ErrorHandler(Display * d, XErrorEvent * e)
{
char *x11_error = NULL;
char x11_error_locale[256];
errorCode = e->error_code;
if (X11_XGetErrorText(d, errorCode, x11_error_locale, sizeof(x11_error_locale)) == Success)
{
x11_error = SDL_iconv_string("UTF-8", "", x11_error_locale, SDL_strlen(x11_error_locale)+1);
}
if (x11_error)
{
SDL_SetError("Could not %s: %s", errorHandlerOperation, x11_error);
SDL_free(x11_error);
}
else
{
SDL_SetError("Could not %s: %i (Base %i)", errorHandlerOperation, errorCode, errorBase);
}
return (0);
}
SDL_bool
X11_GL_UseEGL(_THIS)
{
SDL_assert(_this->gl_data != NULL);
SDL_assert(_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES);
return (SDL_GetHintBoolean(SDL_HINT_OPENGL_ES_DRIVER, SDL_FALSE)
|| _this->gl_config.major_version == 1 /* No GLX extension for OpenGL ES 1.x profiles. */
|| _this->gl_config.major_version > _this->gl_data->es_profile_max_supported_version.major
|| (_this->gl_config.major_version == _this->gl_data->es_profile_max_supported_version.major
&& _this->gl_config.minor_version > _this->gl_data->es_profile_max_supported_version.minor));
}
SDL_GLContext
X11_GL_CreateContext(_THIS, SDL_Window * window)
{
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
Display *display = data->videodata->display;
int screen =
((SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata)->screen;
XWindowAttributes xattr;
XVisualInfo v, *vinfo;
int n;
GLXContext context = NULL, share_context;
if (_this->gl_config.share_with_current_context) {
share_context = (GLXContext)SDL_GL_GetCurrentContext();
} else {
share_context = NULL;
}
/* We do this to create a clean separation between X and GLX errors. */
X11_XSync(display, False);
errorHandlerOperation = "create GL context";
errorBase = _this->gl_data->errorBase;
errorCode = Success;
handler = X11_XSetErrorHandler(X11_GL_ErrorHandler);
X11_XGetWindowAttributes(display, data->xwindow, &xattr);
v.screen = screen;
v.visualid = X11_XVisualIDFromVisual(xattr.visual);
vinfo = X11_XGetVisualInfo(display, VisualScreenMask | VisualIDMask, &v, &n);
if (vinfo) {
if (_this->gl_config.major_version < 3 &&
_this->gl_config.profile_mask == 0 &&
_this->gl_config.flags == 0) {
/* Create legacy context */
context =
_this->gl_data->glXCreateContext(display, vinfo, share_context, True);
} else {
/* max 14 attributes plus terminator */
int attribs[15] = {
GLX_CONTEXT_MAJOR_VERSION_ARB,
_this->gl_config.major_version,
GLX_CONTEXT_MINOR_VERSION_ARB,
_this->gl_config.minor_version,
0
};
int iattr = 4;
/* SDL profile bits match GLX profile bits */
if( _this->gl_config.profile_mask != 0 ) {
attribs[iattr++] = GLX_CONTEXT_PROFILE_MASK_ARB;
attribs[iattr++] = _this->gl_config.profile_mask;
}
/* SDL flags match GLX flags */
if( _this->gl_config.flags != 0 ) {
attribs[iattr++] = GLX_CONTEXT_FLAGS_ARB;
attribs[iattr++] = _this->gl_config.flags;
}
/* only set if glx extension is available */
if( _this->gl_data->HAS_GLX_ARB_context_flush_control ) {
attribs[iattr++] = GLX_CONTEXT_RELEASE_BEHAVIOR_ARB;
attribs[iattr++] =
_this->gl_config.release_behavior ?
GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB :
GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB;
}
/* only set if glx extension is available */
if( _this->gl_data->HAS_GLX_ARB_create_context_robustness ) {
attribs[iattr++] = GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB;
attribs[iattr++] =
_this->gl_config.reset_notification ?
GLX_LOSE_CONTEXT_ON_RESET_ARB :
GLX_NO_RESET_NOTIFICATION_ARB;
}
/* only set if glx extension is available */
if( _this->gl_data->HAS_GLX_ARB_create_context_no_error ) {
attribs[iattr++] = GLX_CONTEXT_OPENGL_NO_ERROR_ARB;
attribs[iattr++] = _this->gl_config.no_error;
}
attribs[iattr++] = 0;
/* Get a pointer to the context creation function for GL 3.0 */
if (!_this->gl_data->glXCreateContextAttribsARB) {
SDL_SetError("OpenGL 3.0 and later are not supported by this system");
} else {
int glxAttribs[64];
/* Create a GL 3.x context */
GLXFBConfig *framebuffer_config = NULL;
int fbcount = 0;
int *pvistypeattr = NULL;
X11_GL_GetAttributes(_this,display,screen,glxAttribs,64,SDL_TRUE,&pvistypeattr);
if (_this->gl_data->glXChooseFBConfig) {
framebuffer_config = _this->gl_data->glXChooseFBConfig(display,
DefaultScreen(display), glxAttribs,
&fbcount);
if (!framebuffer_config && (pvistypeattr != NULL)) {
*pvistypeattr = None;
framebuffer_config = _this->gl_data->glXChooseFBConfig(display,
DefaultScreen(display), glxAttribs,
&fbcount);
}
if (framebuffer_config) {
context = _this->gl_data->glXCreateContextAttribsARB(display,
framebuffer_config[0],
share_context, True, attribs);
X11_XFree(framebuffer_config);
}
}
}
}
X11_XFree(vinfo);
}
X11_XSync(display, False);
X11_XSetErrorHandler(handler);
if (!context) {
if (errorCode == Success) {
SDL_SetError("Could not create GL context");
}
return NULL;
}
if (X11_GL_MakeCurrent(_this, window, context) < 0) {
X11_GL_DeleteContext(_this, context);
return NULL;
}
return context;
}
int
X11_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
Window drawable =
(context ? ((SDL_WindowData *) window->driverdata)->xwindow : None);
GLXContext glx_context = (GLXContext) context;
int rc;
if (!_this->gl_data) {
return SDL_SetError("OpenGL not initialized");
}
/* We do this to create a clean separation between X and GLX errors. */
X11_XSync(display, False);
errorHandlerOperation = "make GL context current";
errorBase = _this->gl_data->errorBase;
errorCode = Success;
handler = X11_XSetErrorHandler(X11_GL_ErrorHandler);
rc = _this->gl_data->glXMakeCurrent(display, drawable, glx_context);
X11_XSetErrorHandler(handler);
if (errorCode != Success) { /* uhoh, an X error was thrown! */
return -1; /* the error handler called SDL_SetError() already. */
} else if (!rc) { /* glXMakeCurrent() failed without throwing an X error */
return SDL_SetError("Unable to make GL context current");
}
return 0;
}
/*
0 is a valid argument to glXSwapInterval(MESA|EXT) and setting it to 0
will undo the effect of a previous call with a value that is greater
than zero (or at least that is what the docs say). OTOH, 0 is an invalid
argument to glXSwapIntervalSGI and it returns an error if you call it
with 0 as an argument.
*/
static int swapinterval = 0;
int
X11_GL_SetSwapInterval(_THIS, int interval)
{
int status = -1;
if ((interval < 0) && (!_this->gl_data->HAS_GLX_EXT_swap_control_tear)) {
SDL_SetError("Negative swap interval unsupported in this GL");
} else if (_this->gl_data->glXSwapIntervalEXT) {
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
const SDL_WindowData *windowdata = (SDL_WindowData *)
SDL_GL_GetCurrentWindow()->driverdata;
Window drawable = windowdata->xwindow;
/*
* This is a workaround for a bug in NVIDIA drivers. Bug has been reported
* and will be fixed in a future release (probably 319.xx).
*
* There's a bug where glXSetSwapIntervalEXT ignores updates because
* it has the wrong value cached. To work around it, we just run a no-op
* update to the current value.
*/
int currentInterval = X11_GL_GetSwapInterval(_this);
_this->gl_data->glXSwapIntervalEXT(display, drawable, currentInterval);
_this->gl_data->glXSwapIntervalEXT(display, drawable, interval);
status = 0;
swapinterval = interval;
} else if (_this->gl_data->glXSwapIntervalMESA) {
status = _this->gl_data->glXSwapIntervalMESA(interval);
if (status != 0) {
SDL_SetError("glXSwapIntervalMESA failed");
} else {
swapinterval = interval;
}
} else if (_this->gl_data->glXSwapIntervalSGI) {
status = _this->gl_data->glXSwapIntervalSGI(interval);
if (status != 0) {
SDL_SetError("glXSwapIntervalSGI failed");
} else {
swapinterval = interval;
}
} else {
SDL_Unsupported();
}
return status;
}
int
X11_GL_GetSwapInterval(_THIS)
{
if (_this->gl_data->glXSwapIntervalEXT) {
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
const SDL_WindowData *windowdata = (SDL_WindowData *)
SDL_GL_GetCurrentWindow()->driverdata;
Window drawable = windowdata->xwindow;
unsigned int allow_late_swap_tearing = 0;
unsigned int interval = 0;
if (_this->gl_data->HAS_GLX_EXT_swap_control_tear) {
_this->gl_data->glXQueryDrawable(display, drawable,
GLX_LATE_SWAPS_TEAR_EXT,
&allow_late_swap_tearing);
}
_this->gl_data->glXQueryDrawable(display, drawable,
GLX_SWAP_INTERVAL_EXT, &interval);
if ((allow_late_swap_tearing) && (interval > 0)) {
return -((int) interval);
}
return (int) interval;
} else if (_this->gl_data->glXGetSwapIntervalMESA) {
return _this->gl_data->glXGetSwapIntervalMESA();
} else {
return swapinterval;
}
}
int
X11_GL_SwapWindow(_THIS, SDL_Window * window)
{
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
Display *display = data->videodata->display;
_this->gl_data->glXSwapBuffers(display, data->xwindow);
return 0;
}
void
X11_GL_DeleteContext(_THIS, SDL_GLContext context)
{
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
GLXContext glx_context = (GLXContext) context;
if (!_this->gl_data) {
return;
}
_this->gl_data->glXDestroyContext(display, glx_context);
X11_XSync(display, False);
}
#endif /* SDL_VIDEO_OPENGL_GLX */
#endif /* SDL_VIDEO_DRIVER_X11 */
/* vi: set ts=4 sw=4 expandtab: */
X11_PumpEvents
void X11_PumpEvents(_THIS)
SDL_strlcpy
#define SDL_strlcpy
Definition: SDL_dynapi_overrides.h:394
SDL_VideoDevice::accum_alpha_size
int accum_alpha_size
Definition: SDL_sysvideo.h:334
attribs
const GLint * attribs
Definition: SDL_opengl_glext.h:9688
SDL_VideoDevice::accum_blue_size
int accum_blue_size
Definition: SDL_sysvideo.h:333
SDL_GLDriverData::swapinterval
uint32_t swapinterval
Definition: SDL_pspgl_c.h:36
SDL_VideoDevice::reset_notification
int reset_notification
Definition: SDL_sysvideo.h:345
SDL_TRUE
Definition: SDL_stdinc.h:142
attrib_list
EGLenum const EGLAttribKHR * attrib_list
Definition: eglext.h:63
e
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 Uint32 * e
Definition: SDL_dynapi_procs.h:117
v
const GLdouble * v
Definition: SDL_opengl.h:2064
SDL_VideoDevice::minor_version
int minor_version
Definition: SDL_sysvideo.h:340
SDL_VideoDevice::blue_size
int blue_size
Definition: SDL_sysvideo.h:325
SDL_VideoDevice::accum_red_size
int accum_red_size
Definition: SDL_sysvideo.h:331
dpy
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display dpy)
Definition: SDL_x11sym.h:44
SDL_VideoData::display
struct wl_display * display
Definition: SDL_waylandvideo.h:40
SDL_FALSE
Definition: SDL_stdinc.h:141
SDL_WindowData::xwindow
Window xwindow
Definition: SDL_x11window.h:46
X11_UseDirectColorVisuals
SDL_bool X11_UseDirectColorVisuals(void)
SDL_VideoDevice::driverdata
void * driverdata
Definition: SDL_sysvideo.h:377
SDL_VideoDevice::GL_SetSwapInterval
int(* GL_SetSwapInterval)(_THIS, int interval)
Definition: SDL_sysvideo.h:260
context
static screen_context_t context
Definition: video.c:25
SDL_VideoDevice::profile_mask
int profile_mask
Definition: SDL_sysvideo.h:342
SDL_x11opengles.h
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
start
GLuint start
Definition: SDL_opengl.h:1571
SDL_GLDriverData::display
EGLDisplay display
Definition: SDL_pspgl_c.h:33
SDL_VideoDevice::GL_LoadLibrary
int(* GL_LoadLibrary)(_THIS, const char *path)
Definition: SDL_sysvideo.h:254
SDL_DisplayData
Definition: SDL_cocoamodes.h:26
SDL_VideoDevice::stereo
int stereo
Definition: SDL_sysvideo.h:335
SDL_VideoDevice::gl_data
struct SDL_GLDriverData * gl_data
Definition: SDL_sysvideo.h:378
SDL_WindowData
Definition: SDL_androidwindow.h:35
SDL_strchr
#define SDL_strchr
Definition: SDL_dynapi_overrides.h:401
SDL_GetHintBoolean
#define SDL_GetHintBoolean
Definition: SDL_dynapi_overrides.h:608
SDL_HINT_OPENGL_ES_DRIVER
#define SDL_HINT_OPENGL_ES_DRIVER
A variable controlling what driver to use for OpenGL ES contexts.
Definition: SDL_hints.h:892
_this
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
SDL_VideoDevice::accelerated
int accelerated
Definition: SDL_sysvideo.h:338
SDL_VideoDevice::multisamplebuffers
int multisamplebuffers
Definition: SDL_sysvideo.h:336
SDL_VideoDevice::multisamplesamples
int multisamplesamples
Definition: SDL_sysvideo.h:337
SDL_VideoDevice::major_version
int major_version
Definition: SDL_sysvideo.h:339
SDL_GLContext
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:175
SDL_VideoDevice::no_error
int no_error
Definition: SDL_sysvideo.h:347
SDL_VideoDevice::GL_CreateContext
SDL_GLContext(* GL_CreateContext)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:257
handle
EGLImageKHR EGLint EGLint * handle
Definition: eglext.h:937
d
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 ** d
Definition: SDL_dynapi_procs.h:117
SDL_VideoDevice::depth_size
int depth_size
Definition: SDL_sysvideo.h:327
SDL_VideoDevice::red_size
int red_size
Definition: SDL_sysvideo.h:323
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
SDL_WindowData::videodata
struct SDL_VideoData * videodata
Definition: SDL_cocoawindow.h:120
SDL_VideoDevice::GL_MakeCurrent
int(* GL_MakeCurrent)(_THIS, SDL_Window *window, SDL_GLContext context)
Definition: SDL_sysvideo.h:258
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
SDL_VideoDevice::double_buffer
int double_buffer
Definition: SDL_sysvideo.h:330
SDL_VideoDevice::driver_loaded
int driver_loaded
Definition: SDL_sysvideo.h:349
SDL_VideoDevice::driver_path
char driver_path[256]
Definition: SDL_sysvideo.h:350
SDL_VideoDevice::dll_handle
void * dll_handle
Definition: SDL_sysvideo.h:351
SDL_GL_DeduceMaxSupportedESProfile
void SDL_GL_DeduceMaxSupportedESProfile(int *major, int *minor)
Definition: SDL_video.c:2942
SDL_hints.h
w
GLubyte GLubyte GLubyte GLubyte w
Definition: SDL_opengl_glext.h:731
SDL_VideoDevice::green_size
int green_size
Definition: SDL_sysvideo.h:324
SDL_VideoDevice::alpha_size
int alpha_size
Definition: SDL_sysvideo.h:326
SDL_VideoDevice::framebuffer_srgb_capable
int framebuffer_srgb_capable
Definition: SDL_sysvideo.h:346
GLubyte
unsigned char GLubyte
Definition: SDL_opengl.h:183
size
GLsizeiptr size
Definition: SDL_opengl_glext.h:537
SDL_getenv
#define SDL_getenv
Definition: SDL_dynapi_overrides.h:378
SDL_VideoDevice::release_behavior
int release_behavior
Definition: SDL_sysvideo.h:344
SDL_VideoDevice::GL_UnloadLibrary
void(* GL_UnloadLibrary)(_THIS)
Definition: SDL_sysvideo.h:256
SDL_VideoDevice::stencil_size
int stencil_size
Definition: SDL_sysvideo.h:329
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
SDL_VideoDevice::share_with_current_context
int share_with_current_context
Definition: SDL_sysvideo.h:343
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:169
NULL
#define NULL
Definition: begin_code.h:164
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:139
SDL_GL_GetCurrentContext
#define SDL_GL_GetCurrentContext
Definition: SDL_dynapi_overrides.h:562
SDL_VideoDevice::flags
int flags
Definition: SDL_sysvideo.h:341
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_loadso.h
SDL_GL_GetCurrentWindow
#define SDL_GL_GetCurrentWindow
Definition: SDL_dynapi_overrides.h:561
SDL_GLDriverData
Definition: SDL_pspgl_c.h:32
SDL_calloc
#define SDL_calloc
Definition: SDL_dynapi_overrides.h:375
SDL_GetDisplayForWindow
SDL_VideoDisplay * SDL_GetDisplayForWindow(SDL_Window *window)
Definition: SDL_video.c:1073
window
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
SDL_VideoDevice::GL_SwapWindow
int(* GL_SwapWindow)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:262
SDL_strlen
#define SDL_strlen
Definition: SDL_dynapi_overrides.h:393
void
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
Definition: SDL_dynapi_procs.h:89
SDL_Window
The type used to identify a window.
Definition: SDL_sysvideo.h:73
config
EGLConfig config
Definition: eglext.h:433
SDL_iconv_string
#define SDL_iconv_string
Definition: SDL_dynapi_overrides.h:441
n
GLdouble n
Definition: SDL_opengl_glext.h:1952
SDL_x11video.h
SDL_VideoData
Definition: SDL_androidvideo.h:35
SDL_arraysize
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:93
path
GLsizei const GLchar *const * path
Definition: SDL_opengl_glext.h:3730
SDL_VideoDevice::gl_config
struct SDL_VideoDevice::@34 gl_config
SDL_VideoDevice::accum_green_size
int accum_green_size
Definition: SDL_sysvideo.h:332
SDL_Window::driverdata
void * driverdata
Definition: SDL_sysvideo.h:111
SDL_VideoDevice::GL_DeleteContext
void(* GL_DeleteContext)(_THIS, SDL_GLContext context)
Definition: SDL_sysvideo.h:263
SDL_VideoDevice::GL_GetSwapInterval
int(* GL_GetSwapInterval)(_THIS)
Definition: SDL_sysvideo.h:261
SDL_GL_CONTEXT_PROFILE_ES
Definition: SDL_video.h:215
screen
SDL_Renderer * screen
Definition: testgamecontroller.c:64
SDL_Unsupported
#define SDL_Unsupported()
Definition: SDL_error.h:53
SDL_VideoDevice::GL_GetProcAddress
void *(* GL_GetProcAddress)(_THIS, const char *proc)
Definition: SDL_sysvideo.h:255
SDL_strstr
#define SDL_strstr
Definition: SDL_dynapi_overrides.h:403
SDL_VideoDisplay::driverdata
void * driverdata
Definition: SDL_sysvideo.h:138
SDL_assert.h