diff options
Diffstat (limited to 'source/3rd-party/SDL2/src/video/x11/SDL_x11opengl.c')
| -rw-r--r-- | source/3rd-party/SDL2/src/video/x11/SDL_x11opengl.c | 946 |
1 files changed, 946 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/video/x11/SDL_x11opengl.c b/source/3rd-party/SDL2/src/video/x11/SDL_x11opengl.c new file mode 100644 index 0000000..7c3cb33 --- /dev/null +++ b/source/3rd-party/SDL2/src/video/x11/SDL_x11opengl.c @@ -0,0 +1,946 @@ +/* + 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: */ |