static Bool
glamor_check_instruction_count(int gl_version)
{
GLint max_native_alu_instructions;
/* Avoid using glamor if the reported instructions limit is too low,
* as this would cause glamor to fallback on sw due to large shaders
* which ends up being unbearably slow.
*/
if (gl_version < 30) {
if (!epoxy_has_gl_extension("GL_ARB_fragment_program")) {
ErrorF("GL_ARB_fragment_program required\n");
return FALSE;
}
glGetProgramivARB(GL_FRAGMENT_PROGRAM_ARB,
GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB,
&max_native_alu_instructions);
if (max_native_alu_instructions < GLAMOR_MIN_ALU_INSTRUCTIONS) {
LogMessage(X_WARNING,
"glamor requires at least %d instructions (%d reported)\n",
GLAMOR_MIN_ALU_INSTRUCTIONS, max_native_alu_instructions);
return FALSE;
}
}
return TRUE;
}
static void
gsk_gl_profiler_init (GskGLProfiler *self)
{
glGenQueries (N_QUERIES, self->gl_queries);
self->first_frame = TRUE;
self->has_timer = epoxy_has_gl_extension ("GL_ARB_timer_query");
}
static void
xwl_drm_init_egl(struct xwl_screen *xwl_screen)
{
EGLint major, minor;
const char *version;
if (xwl_screen->egl_display)
return;
xwl_screen->expecting_event--;
xwl_screen->gbm = gbm_create_device(xwl_screen->drm_fd);
if (xwl_screen->gbm == NULL) {
ErrorF("couldn't get display device\n");
return;
}
xwl_screen->egl_display = eglGetDisplay(xwl_screen->gbm);
if (xwl_screen->egl_display == EGL_NO_DISPLAY) {
ErrorF("eglGetDisplay() failed\n");
return;
}
eglBindAPI(EGL_OPENGL_API);
if (!eglInitialize(xwl_screen->egl_display, &major, &minor)) {
ErrorF("eglInitialize() failed\n");
return;
}
version = eglQueryString(xwl_screen->egl_display, EGL_VERSION);
ErrorF("glamor: EGL version %s:\n", version);
xwl_screen->egl_context = eglCreateContext(xwl_screen->egl_display,
NULL, EGL_NO_CONTEXT, NULL);
if (xwl_screen->egl_context == EGL_NO_CONTEXT) {
ErrorF("Failed to create EGL context\n");
return;
}
if (!eglMakeCurrent(xwl_screen->egl_display,
EGL_NO_SURFACE, EGL_NO_SURFACE,
xwl_screen->egl_context)) {
ErrorF("Failed to make EGL context current\n");
return;
}
if (!epoxy_has_gl_extension("GL_OES_EGL_image")) {
ErrorF("GL_OES_EGL_image not available\n");
return;
}
return;
}
/**
* Configures GL_ARB_debug_output to give us immediate callbacks when
* GL errors occur, so that we can log them.
*/
static void
glamor_setup_debug_output(ScreenPtr screen)
{
if (!epoxy_has_gl_extension("GL_ARB_debug_output"))
return;
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
/* Disable debugging messages other than GL API errors */
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL,
GL_FALSE);
glDebugMessageControl(GL_DEBUG_SOURCE_API,
GL_DEBUG_TYPE_ERROR,
GL_DONT_CARE,
0, NULL, GL_TRUE);
glDebugMessageCallback(glamor_debug_output_callback,
screen);
/* If KHR_debug is present, all debug output is disabled by
* default on non-debug contexts.
*/
if (epoxy_has_gl_extension("GL_KHR_debug"))
glEnable(GL_DEBUG_OUTPUT);
}
/** Set up glamor for an already-configured GL context. */
Bool
glamor_init(ScreenPtr screen, unsigned int flags)
{
glamor_screen_private *glamor_priv;
int gl_version;
int max_viewport_size[2];
#ifdef RENDER
PictureScreenPtr ps = GetPictureScreenIfSet(screen);
#endif
if (flags & ~GLAMOR_VALID_FLAGS) {
ErrorF("glamor_init: Invalid flags %x\n", flags);
return FALSE;
}
glamor_priv = calloc(1, sizeof(*glamor_priv));
if (glamor_priv == NULL)
return FALSE;
glamor_priv->flags = flags;
if (!dixRegisterPrivateKey(&glamor_screen_private_key, PRIVATE_SCREEN, 0)) {
LogMessage(X_WARNING,
"glamor%d: Failed to allocate screen private\n",
screen->myNum);
goto fail;
}
glamor_set_screen_private(screen, glamor_priv);
if (!dixRegisterPrivateKey(&glamor_pixmap_private_key, PRIVATE_PIXMAP, 0)) {
LogMessage(X_WARNING,
"glamor%d: Failed to allocate pixmap private\n",
screen->myNum);
goto fail;
}
if (!dixRegisterPrivateKey(&glamor_gc_private_key, PRIVATE_GC,
sizeof (glamor_gc_private))) {
LogMessage(X_WARNING,
"glamor%d: Failed to allocate gc private\n",
screen->myNum);
goto fail;
}
if (epoxy_is_desktop_gl())
glamor_priv->gl_flavor = GLAMOR_GL_DESKTOP;
else
glamor_priv->gl_flavor = GLAMOR_GL_ES2;
gl_version = epoxy_gl_version();
/* Would be nice to have a cleaner test for GLSL 1.30 support,
* but for now this should suffice
*/
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP && gl_version >= 30)
glamor_priv->glsl_version = 130;
else
glamor_priv->glsl_version = 120;
/* We'd like to require GL_ARB_map_buffer_range or
* GL_OES_map_buffer_range, since it offers more information to
* the driver than plain old glMapBuffer() or glBufferSubData().
* It's been supported on Mesa on the desktop since 2009 and on
* GLES2 since October 2012. It's supported on Apple's iOS
* drivers for SGX535 and A7, but apparently not on most Android
* devices (the OES extension spec wasn't released until June
* 2012).
*
* 82% of 0 A.D. players (desktop GL) submitting hardware reports
* have support for it, with most of the ones lacking it being on
* Windows with Intel 4-series (G45) graphics or older.
*/
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) {
if (gl_version < 21) {
ErrorF("Require OpenGL version 2.1 or later.\n");
goto fail;
}
} else {
if (gl_version < 20) {
ErrorF("Require Open GLES2.0 or later.\n");
goto fail;
}
if (!epoxy_has_gl_extension("GL_EXT_texture_format_BGRA8888")) {
ErrorF("GL_EXT_texture_format_BGRA8888 required\n");
goto fail;
}
}
glamor_priv->has_rw_pbo = FALSE;
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP)
glamor_priv->has_rw_pbo = TRUE;
glamor_priv->has_khr_debug = epoxy_has_gl_extension("GL_KHR_debug");
glamor_priv->has_pack_invert =
epoxy_has_gl_extension("GL_MESA_pack_invert");
glamor_priv->has_fbo_blit =
epoxy_has_gl_extension("GL_EXT_framebuffer_blit");
glamor_priv->has_map_buffer_range =
epoxy_has_gl_extension("GL_ARB_map_buffer_range");
glamor_priv->has_buffer_storage =
epoxy_has_gl_extension("GL_ARB_buffer_storage");
glamor_priv->has_nv_texture_barrier =
epoxy_has_gl_extension("GL_NV_texture_barrier");
glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &glamor_priv->max_fbo_size);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &glamor_priv->max_fbo_size);
glGetIntegerv(GL_MAX_VIEWPORT_DIMS, max_viewport_size);
glamor_priv->max_fbo_size = MIN(glamor_priv->max_fbo_size, max_viewport_size[0]);
glamor_priv->max_fbo_size = MIN(glamor_priv->max_fbo_size, max_viewport_size[1]);
#ifdef MAX_FBO_SIZE
glamor_priv->max_fbo_size = MAX_FBO_SIZE;
#endif
glamor_set_debug_level(&glamor_debug_level);
/* If we are using egl screen, call egl screen init to
* register correct close screen function. */
if (flags & GLAMOR_USE_EGL_SCREEN) {
glamor_egl_screen_init(screen, &glamor_priv->ctx);
} else {
if (!glamor_glx_screen_init(&glamor_priv->ctx))
goto fail;
}
glamor_priv->saved_procs.close_screen = screen->CloseScreen;
screen->CloseScreen = glamor_close_screen;
glamor_priv->saved_procs.create_screen_resources =
screen->CreateScreenResources;
screen->CreateScreenResources = glamor_create_screen_resources;
if (!glamor_font_init(screen))
goto fail;
if (flags & GLAMOR_USE_SCREEN) {
if (!RegisterBlockAndWakeupHandlers(_glamor_block_handler,
_glamor_wakeup_handler,
glamor_priv)) {
goto fail;
}
glamor_priv->saved_procs.create_gc = screen->CreateGC;
screen->CreateGC = glamor_create_gc;
glamor_priv->saved_procs.create_pixmap = screen->CreatePixmap;
screen->CreatePixmap = glamor_create_pixmap;
glamor_priv->saved_procs.destroy_pixmap = screen->DestroyPixmap;
screen->DestroyPixmap = glamor_destroy_pixmap;
glamor_priv->saved_procs.get_spans = screen->GetSpans;
screen->GetSpans = glamor_get_spans;
glamor_priv->saved_procs.get_image = screen->GetImage;
screen->GetImage = glamor_get_image;
glamor_priv->saved_procs.change_window_attributes =
screen->ChangeWindowAttributes;
screen->ChangeWindowAttributes = glamor_change_window_attributes;
glamor_priv->saved_procs.copy_window = screen->CopyWindow;
screen->CopyWindow = glamor_copy_window;
glamor_priv->saved_procs.bitmap_to_region = screen->BitmapToRegion;
screen->BitmapToRegion = glamor_bitmap_to_region;
}
#ifdef RENDER
if (flags & GLAMOR_USE_PICTURE_SCREEN) {
glamor_priv->saved_procs.composite = ps->Composite;
ps->Composite = glamor_composite;
glamor_priv->saved_procs.trapezoids = ps->Trapezoids;
ps->Trapezoids = glamor_trapezoids;
glamor_priv->saved_procs.triangles = ps->Triangles;
ps->Triangles = glamor_triangles;
glamor_priv->saved_procs.addtraps = ps->AddTraps;
ps->AddTraps = glamor_add_traps;
}
glamor_priv->saved_procs.composite_rects = ps->CompositeRects;
ps->CompositeRects = glamor_composite_rectangles;
glamor_priv->saved_procs.glyphs = ps->Glyphs;
ps->Glyphs = glamor_glyphs;
glamor_priv->saved_procs.unrealize_glyph = ps->UnrealizeGlyph;
ps->UnrealizeGlyph = glamor_glyph_unrealize;
glamor_priv->saved_procs.create_picture = ps->CreatePicture;
ps->CreatePicture = glamor_create_picture;
glamor_priv->saved_procs.destroy_picture = ps->DestroyPicture;
ps->DestroyPicture = glamor_destroy_picture;
glamor_init_composite_shaders(screen);
#endif
glamor_priv->saved_procs.set_window_pixmap = screen->SetWindowPixmap;
screen->SetWindowPixmap = glamor_set_window_pixmap;
glamor_init_vbo(screen);
glamor_init_pixmap_fbo(screen);
#ifdef GLAMOR_TRAPEZOID_SHADER
glamor_init_trapezoid_shader(screen);
#endif
glamor_init_finish_access_shaders(screen);
#ifdef GLAMOR_GRADIENT_SHADER
glamor_init_gradient_shader(screen);
#endif
glamor_pixmap_init(screen);
glamor_glyphs_init(screen);
glamor_sync_init(screen);
glamor_priv->screen = screen;
return TRUE;
fail:
free(glamor_priv);
glamor_set_screen_private(screen, NULL);
return FALSE;
}
/** Set up glamor for an already-configured GL context. */
Bool
glamor_init(ScreenPtr screen, unsigned int flags)
{
glamor_screen_private *glamor_priv;
int gl_version;
int glsl_major, glsl_minor;
int max_viewport_size[2];
const char *shading_version_string;
int shading_version_offset;
PictureScreenPtr ps = GetPictureScreenIfSet(screen);
if (flags & ~GLAMOR_VALID_FLAGS) {
ErrorF("glamor_init: Invalid flags %x\n", flags);
return FALSE;
}
glamor_priv = calloc(1, sizeof(*glamor_priv));
if (glamor_priv == NULL)
return FALSE;
glamor_priv->flags = flags;
if (!dixRegisterPrivateKey(&glamor_screen_private_key, PRIVATE_SCREEN, 0)) {
LogMessage(X_WARNING,
"glamor%d: Failed to allocate screen private\n",
screen->myNum);
goto fail;
}
glamor_set_screen_private(screen, glamor_priv);
if (!dixRegisterPrivateKey(&glamor_pixmap_private_key, PRIVATE_PIXMAP,
sizeof(struct glamor_pixmap_private))) {
LogMessage(X_WARNING,
"glamor%d: Failed to allocate pixmap private\n",
screen->myNum);
goto fail;
}
if (!dixRegisterPrivateKey(&glamor_gc_private_key, PRIVATE_GC,
sizeof (glamor_gc_private))) {
LogMessage(X_WARNING,
"glamor%d: Failed to allocate gc private\n",
screen->myNum);
goto fail;
}
glamor_priv->saved_procs.close_screen = screen->CloseScreen;
screen->CloseScreen = glamor_close_screen;
/* If we are using egl screen, call egl screen init to
* register correct close screen function. */
if (flags & GLAMOR_USE_EGL_SCREEN) {
glamor_egl_screen_init(screen, &glamor_priv->ctx);
} else {
if (!glamor_glx_screen_init(&glamor_priv->ctx))
goto fail;
}
glamor_make_current(glamor_priv);
if (epoxy_is_desktop_gl())
glamor_priv->gl_flavor = GLAMOR_GL_DESKTOP;
else
glamor_priv->gl_flavor = GLAMOR_GL_ES2;
gl_version = epoxy_gl_version();
shading_version_string = (char *) glGetString(GL_SHADING_LANGUAGE_VERSION);
if (!shading_version_string) {
LogMessage(X_WARNING,
"glamor%d: Failed to get GLSL version\n",
screen->myNum);
goto fail;
}
shading_version_offset = 0;
if (strncmp("OpenGL ES GLSL ES ", shading_version_string, 18) == 0)
shading_version_offset = 18;
if (sscanf(shading_version_string + shading_version_offset,
"%i.%i",
&glsl_major,
&glsl_minor) != 2) {
LogMessage(X_WARNING,
"glamor%d: Failed to parse GLSL version string %s\n",
screen->myNum, shading_version_string);
goto fail;
}
glamor_priv->glsl_version = glsl_major * 100 + glsl_minor;
if (glamor_priv->gl_flavor == GLAMOR_GL_ES2) {
/* Force us back to the base version of our programs on an ES
* context, anyway. Basically glamor only uses desktop 1.20
* or 1.30 currently. 1.30's new features are also present in
* ES 3.0, but our glamor_program.c constructions use a lot of
* compatibility features (to reduce the diff between 1.20 and
* 1.30 programs).
*/
glamor_priv->glsl_version = 120;
}
/* We'd like to require GL_ARB_map_buffer_range or
* GL_OES_map_buffer_range, since it offers more information to
* the driver than plain old glMapBuffer() or glBufferSubData().
* It's been supported on Mesa on the desktop since 2009 and on
* GLES2 since October 2012. It's supported on Apple's iOS
* drivers for SGX535 and A7, but apparently not on most Android
* devices (the OES extension spec wasn't released until June
* 2012).
*
* 82% of 0 A.D. players (desktop GL) submitting hardware reports
* have support for it, with most of the ones lacking it being on
* Windows with Intel 4-series (G45) graphics or older.
*/
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) {
if (gl_version < 21) {
ErrorF("Require OpenGL version 2.1 or later.\n");
goto fail;
}
if (!glamor_check_instruction_count(gl_version))
goto fail;
} else {
if (gl_version < 20) {
ErrorF("Require Open GLES2.0 or later.\n");
goto fail;
}
if (!epoxy_has_gl_extension("GL_EXT_texture_format_BGRA8888")) {
ErrorF("GL_EXT_texture_format_BGRA8888 required\n");
goto fail;
}
}
glamor_priv->has_rw_pbo = FALSE;
if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP)
glamor_priv->has_rw_pbo = TRUE;
glamor_priv->has_khr_debug = epoxy_has_gl_extension("GL_KHR_debug");
glamor_priv->has_pack_invert =
epoxy_has_gl_extension("GL_MESA_pack_invert");
glamor_priv->has_fbo_blit =
epoxy_has_gl_extension("GL_EXT_framebuffer_blit");
glamor_priv->has_map_buffer_range =
epoxy_has_gl_extension("GL_ARB_map_buffer_range") ||
epoxy_has_gl_extension("GL_EXT_map_buffer_range");
glamor_priv->has_buffer_storage =
epoxy_has_gl_extension("GL_ARB_buffer_storage");
glamor_priv->has_nv_texture_barrier =
epoxy_has_gl_extension("GL_NV_texture_barrier");
glamor_priv->has_unpack_subimage =
glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP ||
epoxy_gl_version() >= 30 ||
epoxy_has_gl_extension("GL_EXT_unpack_subimage");
glamor_priv->has_pack_subimage =
glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP ||
epoxy_gl_version() >= 30 ||
epoxy_has_gl_extension("GL_NV_pack_subimage");
glamor_priv->has_vertex_array_object =
epoxy_has_gl_extension("GL_ARB_vertex_array_object");
glamor_priv->has_dual_blend =
epoxy_has_gl_extension("GL_ARB_blend_func_extended");
/* assume a core profile if we are GL 3.1 and don't have ARB_compatibility */
glamor_priv->is_core_profile =
gl_version >= 31 && !epoxy_has_gl_extension("GL_ARB_compatibility");
glamor_setup_debug_output(screen);
glamor_priv->use_quads = (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) &&
!glamor_priv->is_core_profile;
/* Driver-specific hack: Avoid using GL_QUADS on VC4, where
* they'll be emulated more expensively than we can with our
* cached IB.
*/
if (strstr((char *)glGetString(GL_VENDOR), "Broadcom") &&
strstr((char *)glGetString(GL_RENDERER), "VC4"))
glamor_priv->use_quads = FALSE;
glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &glamor_priv->max_fbo_size);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &glamor_priv->max_fbo_size);
glGetIntegerv(GL_MAX_VIEWPORT_DIMS, max_viewport_size);
glamor_priv->max_fbo_size = MIN(glamor_priv->max_fbo_size, max_viewport_size[0]);
glamor_priv->max_fbo_size = MIN(glamor_priv->max_fbo_size, max_viewport_size[1]);
#ifdef MAX_FBO_SIZE
glamor_priv->max_fbo_size = MAX_FBO_SIZE;
#endif
glamor_priv->one_channel_format = GL_ALPHA;
if (epoxy_has_gl_extension("GL_ARB_texture_rg") && epoxy_has_gl_extension("GL_ARB_texture_swizzle"))
glamor_priv->one_channel_format = GL_RED;
glamor_set_debug_level(&glamor_debug_level);
glamor_priv->saved_procs.create_screen_resources =
screen->CreateScreenResources;
screen->CreateScreenResources = glamor_create_screen_resources;
if (!glamor_font_init(screen))
goto fail;
glamor_priv->saved_procs.block_handler = screen->BlockHandler;
screen->BlockHandler = _glamor_block_handler;
if (!glamor_composite_glyphs_init(screen)) {
ErrorF("Failed to initialize composite masks\n");
goto fail;
}
glamor_priv->saved_procs.create_gc = screen->CreateGC;
screen->CreateGC = glamor_create_gc;
glamor_priv->saved_procs.create_pixmap = screen->CreatePixmap;
screen->CreatePixmap = glamor_create_pixmap;
glamor_priv->saved_procs.destroy_pixmap = screen->DestroyPixmap;
screen->DestroyPixmap = glamor_destroy_pixmap;
glamor_priv->saved_procs.get_spans = screen->GetSpans;
screen->GetSpans = glamor_get_spans;
glamor_priv->saved_procs.get_image = screen->GetImage;
screen->GetImage = glamor_get_image;
glamor_priv->saved_procs.change_window_attributes =
screen->ChangeWindowAttributes;
screen->ChangeWindowAttributes = glamor_change_window_attributes;
glamor_priv->saved_procs.copy_window = screen->CopyWindow;
screen->CopyWindow = glamor_copy_window;
glamor_priv->saved_procs.bitmap_to_region = screen->BitmapToRegion;
screen->BitmapToRegion = glamor_bitmap_to_region;
glamor_priv->saved_procs.composite = ps->Composite;
ps->Composite = glamor_composite;
glamor_priv->saved_procs.trapezoids = ps->Trapezoids;
ps->Trapezoids = glamor_trapezoids;
glamor_priv->saved_procs.triangles = ps->Triangles;
ps->Triangles = glamor_triangles;
glamor_priv->saved_procs.addtraps = ps->AddTraps;
ps->AddTraps = glamor_add_traps;
glamor_priv->saved_procs.composite_rects = ps->CompositeRects;
ps->CompositeRects = glamor_composite_rectangles;
glamor_priv->saved_procs.glyphs = ps->Glyphs;
ps->Glyphs = glamor_composite_glyphs;
glamor_init_vbo(screen);
glamor_init_pixmap_fbo(screen);
glamor_init_finish_access_shaders(screen);
#ifdef GLAMOR_GRADIENT_SHADER
glamor_init_gradient_shader(screen);
#endif
glamor_pixmap_init(screen);
glamor_sync_init(screen);
glamor_priv->screen = screen;
return TRUE;
fail:
free(glamor_priv);
glamor_set_screen_private(screen, NULL);
return FALSE;
}
struct ephyr_glamor *
ephyr_glamor_glx_screen_init(xcb_window_t win)
{
int (*oldErrorHandler) (Display *, XErrorEvent *);
static const float position[] = {
-1, -1,
1, -1,
1, 1,
-1, 1,
0, 1,
1, 1,
1, 0,
0, 0,
};
GLint old_vao;
GLXContext ctx;
struct ephyr_glamor *glamor;
GLXWindow glx_win;
glamor = calloc(1, sizeof(struct ephyr_glamor));
if (!glamor) {
FatalError("malloc");
return NULL;
}
glx_win = glXCreateWindow(dpy, fb_config, win, NULL);
if (ephyr_glamor_gles2) {
static const int context_attribs[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 2,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_ES_PROFILE_BIT_EXT,
0,
};
if (epoxy_has_glx_extension(dpy, DefaultScreen(dpy),
"GLX_EXT_create_context_es2_profile")) {
ctx = glXCreateContextAttribsARB(dpy, fb_config, NULL, True,
context_attribs);
} else {
FatalError("Xephyr -glamor_gles2 rquires "
"GLX_EXT_create_context_es2_profile\n");
}
} else {
if (epoxy_has_glx_extension(dpy, DefaultScreen(dpy),
"GLX_ARB_create_context")) {
static const int context_attribs[] = {
GLX_CONTEXT_PROFILE_MASK_ARB,
GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
GLX_CONTEXT_MAJOR_VERSION_ARB,
GLAMOR_GL_CORE_VER_MAJOR,
GLX_CONTEXT_MINOR_VERSION_ARB,
GLAMOR_GL_CORE_VER_MINOR,
0,
};
oldErrorHandler = XSetErrorHandler(ephyr_glx_error_handler);
ctx = glXCreateContextAttribsARB(dpy, fb_config, NULL, True,
context_attribs);
XSync(dpy, False);
XSetErrorHandler(oldErrorHandler);
} else {
ctx = NULL;
}
if (!ctx)
ctx = glXCreateContext(dpy, visual_info, NULL, True);
}
if (ctx == NULL)
FatalError("glXCreateContext failed\n");
if (!glXMakeCurrent(dpy, glx_win, ctx))
FatalError("glXMakeCurrent failed\n");
glamor->ctx = ctx;
glamor->win = win;
glamor->glx_win = glx_win;
ephyr_glamor_setup_texturing_shader(glamor);
if (epoxy_has_gl_extension("GL_ARB_vertex_array_object")) {
glGenVertexArrays(1, &glamor->vao);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &old_vao);
glBindVertexArray(glamor->vao);
} else
glamor->vao = 0;
glGenBuffers(1, &glamor->vbo);
glBindBuffer(GL_ARRAY_BUFFER, glamor->vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof (position), position, GL_STATIC_DRAW);
if (glamor->vao) {
ephyr_glamor_set_vertices(glamor);
glBindVertexArray(old_vao);
} else
glBindBuffer(GL_ARRAY_BUFFER, 0);
return glamor;
}
