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mpv/video/out/opengl/context_glx.c
nanahi 2533ea764f various: add GPU context description 
Now that obj_settings_list is used for GPU contexts, detailed
descriptions can be added so that --gpu-context=help can print
the descriptions of the GPU contexts using standard
obj_settings_list help printing.
2024-04-18 16:28:21 +02:00

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <X11/Xlib.h>
#include <GL/glx.h>
// FreeBSD 10.0-CURRENT lacks the GLX_ARB_create_context extension completely
#ifndef GLX_CONTEXT_MAJOR_VERSION_ARB
#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
#define GLX_CONTEXT_FLAGS_ARB 0x2094
#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
#ifndef __APPLE__
// These are respectively 0x00000001 and 0x00000002 on macOS
#define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
#endif
#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
#endif
// GLX_EXT_create_context_es2_profile
#ifndef GLX_CONTEXT_ES2_PROFILE_BIT_EXT
#define GLX_CONTEXT_ES2_PROFILE_BIT_EXT 0x00000004
#endif
#include "osdep/timer.h"
#include "video/out/present_sync.h"
#include "video/out/x11_common.h"
#include "context.h"
#include "utils.h"
struct priv {
GL gl;
XVisualInfo *vinfo;
GLXContext context;
GLXFBConfig fbc;
};
static void glx_uninit(struct ra_ctx *ctx)
{
struct priv *p = ctx->priv;
ra_gl_ctx_uninit(ctx);
if (p->vinfo)
XFree(p->vinfo);
if (p->context) {
Display *display = ctx->vo->x11->display;
glXMakeCurrent(display, None, NULL);
glXDestroyContext(display, p->context);
}
vo_x11_uninit(ctx->vo);
}
typedef GLXContext (*glXCreateContextAttribsARBProc)
(Display*, GLXFBConfig, GLXContext, Bool, const int*);
static bool create_context_x11(struct ra_ctx *ctx, GL *gl, bool es)
{
struct priv *p = ctx->priv;
struct vo *vo = ctx->vo;
glXCreateContextAttribsARBProc glXCreateContextAttribsARB =
(glXCreateContextAttribsARBProc)
glXGetProcAddressARB((const GLubyte *)"glXCreateContextAttribsARB");
const char *glxstr =
glXQueryExtensionsString(vo->x11->display, vo->x11->screen);
if (!glxstr) {
MP_ERR(ctx, "GLX did not advertise any extensions\n");
return false;
}
if (!gl_check_extension(glxstr, "GLX_ARB_create_context_profile") ||
!glXCreateContextAttribsARB) {
MP_ERR(ctx, "GLX does not support GLX_ARB_create_context_profile\n");
return false;
}
int ctx_flags = ctx->opts.debug ? GLX_CONTEXT_DEBUG_BIT_ARB : 0;
int profile_mask = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
if (es) {
profile_mask = GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (!gl_check_extension(glxstr, "GLX_EXT_create_context_es2_profile"))
return false;
}
int context_attribs[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 0,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
GLX_CONTEXT_PROFILE_MASK_ARB, profile_mask,
GLX_CONTEXT_FLAGS_ARB, ctx_flags,
None
};
GLXContext context;
if (!es) {
for (int n = 0; mpgl_min_required_gl_versions[n]; n++) {
int version = mpgl_min_required_gl_versions[n];
MP_VERBOSE(ctx, "Creating OpenGL %d.%d context...\n",
MPGL_VER_P(version));
context_attribs[1] = MPGL_VER_GET_MAJOR(version);
context_attribs[3] = MPGL_VER_GET_MINOR(version);
vo_x11_silence_xlib(1);
context = glXCreateContextAttribsARB(vo->x11->display,
p->fbc, 0, True,
context_attribs);
vo_x11_silence_xlib(-1);
if (context)
break;
}
} else {
context_attribs[1] = 2;
vo_x11_silence_xlib(1);
context = glXCreateContextAttribsARB(vo->x11->display,
p->fbc, 0, True,
context_attribs);
vo_x11_silence_xlib(-1);
}
if (!context)
return false;
// set context
if (!glXMakeCurrent(vo->x11->display, vo->x11->window, context)) {
MP_FATAL(vo, "Could not set GLX context!\n");
glXDestroyContext(vo->x11->display, context);
return false;
}
p->context = context;
mpgl_load_functions(gl, (void *)glXGetProcAddressARB, glxstr, vo->log);
return true;
}
// The GL3/FBC initialization code roughly follows/copies from:
// http://www.opengl.org/wiki/Tutorial:_OpenGL_3.0_Context_Creation_(GLX)
// but also uses some of the old code.
static GLXFBConfig select_fb_config(struct vo *vo, const int *attribs, bool alpha)
{
int fbcount;
GLXFBConfig *fbc = glXChooseFBConfig(vo->x11->display, vo->x11->screen,
attribs, &fbcount);
if (!fbc)
return NULL;
// The list in fbc is sorted (so that the first element is the best).
GLXFBConfig fbconfig = fbcount > 0 ? fbc[0] : NULL;
if (alpha) {
for (int n = 0; n < fbcount; n++) {
XVisualInfo *v = glXGetVisualFromFBConfig(vo->x11->display, fbc[n]);
if (v) {
bool is_rgba = vo_x11_is_rgba_visual(v);
XFree(v);
if (is_rgba) {
fbconfig = fbc[n];
break;
}
}
}
}
XFree(fbc);
return fbconfig;
}
static void set_glx_attrib(int *attribs, int name, int value)
{
for (int n = 0; attribs[n * 2 + 0] != None; n++) {
if (attribs[n * 2 + 0] == name) {
attribs[n * 2 + 1] = value;
break;
}
}
}
static bool glx_check_visible(struct ra_ctx *ctx)
{
return vo_x11_check_visible(ctx->vo);
}
static void glx_swap_buffers(struct ra_ctx *ctx)
{
glXSwapBuffers(ctx->vo->x11->display, ctx->vo->x11->window);
if (ctx->vo->x11->use_present)
present_sync_swap(ctx->vo->x11->present);
}
static void glx_get_vsync(struct ra_ctx *ctx, struct vo_vsync_info *info)
{
struct vo_x11_state *x11 = ctx->vo->x11;
if (ctx->vo->x11->use_present)
present_sync_get_info(x11->present, info);
}
static bool glx_init(struct ra_ctx *ctx)
{
struct priv *p = ctx->priv = talloc_zero(ctx, struct priv);
struct vo *vo = ctx->vo;
GL *gl = &p->gl;
if (!vo_x11_init(ctx->vo))
goto uninit;
int glx_major, glx_minor;
if (!glXQueryVersion(vo->x11->display, &glx_major, &glx_minor)) {
MP_ERR(ctx, "GLX not found.\n");
goto uninit;
}
// FBConfigs were added in GLX version 1.3.
if (MPGL_VER(glx_major, glx_minor) < MPGL_VER(1, 3)) {
MP_ERR(ctx, "GLX version older than 1.3.\n");
goto uninit;
}
int glx_attribs[] = {
GLX_X_RENDERABLE, True,
GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 0,
GLX_DOUBLEBUFFER, True,
None
};
GLXFBConfig fbc = NULL;
if (ctx->opts.want_alpha) {
set_glx_attrib(glx_attribs, GLX_ALPHA_SIZE, 1);
fbc = select_fb_config(vo, glx_attribs, true);
if (!fbc)
set_glx_attrib(glx_attribs, GLX_ALPHA_SIZE, 0);
}
if (!fbc)
fbc = select_fb_config(vo, glx_attribs, false);
if (!fbc) {
MP_ERR(ctx, "no GLX support present\n");
goto uninit;
}
int fbid = -1;
if (!glXGetFBConfigAttrib(vo->x11->display, fbc, GLX_FBCONFIG_ID, &fbid))
MP_VERBOSE(ctx, "GLX chose FB config with ID 0x%x\n", fbid);
p->fbc = fbc;
p->vinfo = glXGetVisualFromFBConfig(vo->x11->display, fbc);
if (p->vinfo) {
MP_VERBOSE(ctx, "GLX chose visual with ID 0x%x\n",
(int)p->vinfo->visualid);
} else {
MP_WARN(ctx, "Selected GLX FB config has no associated X visual\n");
}
if (!vo_x11_create_vo_window(vo, p->vinfo, "gl"))
goto uninit;
bool success = false;
enum gles_mode mode = ra_gl_ctx_get_glesmode(ctx);
if (mode == GLES_NO || mode == GLES_AUTO)
success = create_context_x11(ctx, gl, false);
if (!success && (mode == GLES_YES || mode == GLES_AUTO))
success = create_context_x11(ctx, gl, true);
if (success && !glXIsDirect(vo->x11->display, p->context))
gl->mpgl_caps |= MPGL_CAP_SW;
if (!success)
goto uninit;
struct ra_gl_ctx_params params = {
.check_visible = glx_check_visible,
.swap_buffers = glx_swap_buffers,
.get_vsync = glx_get_vsync,
};
if (!ra_gl_ctx_init(ctx, gl, params))
goto uninit;
ra_add_native_resource(ctx->ra, "x11", vo->x11->display);
return true;
uninit:
glx_uninit(ctx);
return false;
}
static void resize(struct ra_ctx *ctx)
{
ra_gl_ctx_resize(ctx->swapchain, ctx->vo->dwidth, ctx->vo->dheight, 0);
}
static bool glx_reconfig(struct ra_ctx *ctx)
{
vo_x11_config_vo_window(ctx->vo);
resize(ctx);
return true;
}
static int glx_control(struct ra_ctx *ctx, int *events, int request, void *arg)
{
int ret = vo_x11_control(ctx->vo, events, request, arg);
if (*events & VO_EVENT_RESIZE)
resize(ctx);
return ret;
}
static void glx_wakeup(struct ra_ctx *ctx)
{
vo_x11_wakeup(ctx->vo);
}
static void glx_wait_events(struct ra_ctx *ctx, int64_t until_time_ns)
{
vo_x11_wait_events(ctx->vo, until_time_ns);
}
const struct ra_ctx_fns ra_ctx_glx = {
.type = "opengl",
.name = "x11",
.description = "X11/GLX",
.reconfig = glx_reconfig,
.control = glx_control,
.wakeup = glx_wakeup,
.wait_events = glx_wait_events,
.init = glx_init,
.uninit = glx_uninit,
};
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