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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 "config.h"
#if HAVE_LIBDL
#include <dlfcn.h>
#endif
#include "common/common.h"
#include "egl_helpers.h"
#include "common.h"
#include "context.h"
#if HAVE_EGL_ANGLE
// On Windows, egl_helpers.c is only used by ANGLE, where the EGL functions may
// be loaded dynamically from ANGLE DLLs
#include "angle_dynamic.h"
#endif
// EGL 1.5
#ifndef EGL_CONTEXT_OPENGL_PROFILE_MASK
#define EGL_CONTEXT_MAJOR_VERSION 0x3098
#define EGL_CONTEXT_MINOR_VERSION 0x30FB
#define EGL_CONTEXT_OPENGL_PROFILE_MASK 0x30FD
#define EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT 0x00000001
#define EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE 0x31B1
#define EGL_OPENGL_ES3_BIT 0x00000040
#endif
// es_version = 0 (desktop), 2/3 (ES major version)
static bool create_context(EGLDisplay display, struct mp_log *log, bool probing,
int es_version, struct mpegl_opts *opts,
EGLContext *out_context, EGLConfig *out_config)
{
int msgl = probing ? MSGL_V : MSGL_FATAL;
EGLenum api = EGL_OPENGL_API;
EGLint rend = EGL_OPENGL_BIT;
const char *name = "Desktop OpenGL";
if (es_version == 2) {
api = EGL_OPENGL_ES_API;
rend = EGL_OPENGL_ES2_BIT;
name = "GLES 2.0";
}
if (es_version == 3) {
api = EGL_OPENGL_ES_API;
rend = EGL_OPENGL_ES3_BIT;
name = "GLES 3.x";
}
mp_msg(log, MSGL_V, "Trying to create %s context.\n", name);
if (!eglBindAPI(api)) {
mp_msg(log, MSGL_V, "Could not bind API!\n");
return false;
}
EGLint attributes[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_ALPHA_SIZE, (opts->vo_flags & VOFLAG_ALPHA ) ? 1 : 0,
EGL_RENDERABLE_TYPE, rend,
EGL_NONE
};
EGLint num_configs;
if (!eglChooseConfig(display, attributes, NULL, 0, &num_configs))
num_configs = 0;
EGLConfig *configs = talloc_array(NULL, EGLConfig, num_configs);
if (!eglChooseConfig(display, attributes, configs, num_configs, &num_configs))
num_configs = 0;
if (!num_configs) {
talloc_free(configs);
mp_msg(log, msgl, "Could not choose EGLConfig!\n");
return false;
}
int chosen = 0;
if (opts->refine_config)
chosen = opts->refine_config(opts->user_data, configs, num_configs);
EGLConfig config = configs[chosen];
talloc_free(configs);
EGLContext *ctx = NULL;
if (es_version) {
EGLint attrs[] = {
EGL_CONTEXT_CLIENT_VERSION, es_version,
EGL_NONE
};
ctx = eglCreateContext(display, config, EGL_NO_CONTEXT, attrs);
} else {
for (int n = 0; mpgl_preferred_gl_versions[n]; n++) {
int ver = mpgl_preferred_gl_versions[n];
EGLint attrs[] = {
EGL_CONTEXT_MAJOR_VERSION, MPGL_VER_GET_MAJOR(ver),
EGL_CONTEXT_MINOR_VERSION, MPGL_VER_GET_MINOR(ver),
EGL_CONTEXT_OPENGL_PROFILE_MASK,
ver >= 320 ? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT : 0,
EGL_NONE
};
ctx = eglCreateContext(display, config, EGL_NO_CONTEXT, attrs);
if (ctx)
break;
}
if (!ctx) {
// Fallback for EGL 1.4 without EGL_KHR_create_context.
EGLint attrs[] = { EGL_NONE };
ctx = eglCreateContext(display, config, EGL_NO_CONTEXT, attrs);
}
}
if (!ctx) {
mp_msg(log, msgl, "Could not create EGL context!\n");
return false;
}
*out_context = ctx;
*out_config = config;
return true;
}
#define STR_OR_ERR(s) ((s) ? (s) : "(error)")
// Create a context and return it and the config it was created with. If it
// returns false, the out_* pointers are set to NULL.
// vo_flags is a combination of VOFLAG_* values.
bool mpegl_create_context(EGLDisplay display, struct mp_log *log, int vo_flags,
EGLContext *out_context, EGLConfig *out_config)
{
return mpegl_create_context_opts(display, log,
&(struct mpegl_opts){.vo_flags = vo_flags}, out_context, out_config);
}
// Create a context and return it and the config it was created with. If it
// returns false, the out_* pointers are set to NULL.
bool mpegl_create_context_opts(EGLDisplay display, struct mp_log *log,
struct mpegl_opts *opts,
EGLContext *out_context, EGLConfig *out_config)
{
assert(opts);
*out_context = NULL;
*out_config = NULL;
const char *version = eglQueryString(display, EGL_VERSION);
const char *vendor = eglQueryString(display, EGL_VENDOR);
const char *apis = eglQueryString(display, EGL_CLIENT_APIS);
mp_verbose(log, "EGL_VERSION=%s\nEGL_VENDOR=%s\nEGL_CLIENT_APIS=%s\n",
STR_OR_ERR(version), STR_OR_ERR(vendor), STR_OR_ERR(apis));
bool probing = opts->vo_flags & VOFLAG_PROBING;
int msgl = probing ? MSGL_V : MSGL_FATAL;
bool try_gles = !(opts->vo_flags & VOFLAG_NO_GLES);
if (!(opts->vo_flags & VOFLAG_GLES)) {
// Desktop OpenGL
if (create_context(display, log, try_gles | probing, 0, opts,
out_context, out_config))
return true;
}
if (try_gles && !(opts->vo_flags & VOFLAG_GLES2)) {
// ES 3.x
if (create_context(display, log, true, 3, opts,
out_context, out_config))
return true;
}
if (try_gles) {
// ES 2.0
if (create_context(display, log, probing, 2, opts,
out_context, out_config))
return true;
}
mp_msg(log, msgl, "Could not create a GL context.\n");
return false;
}
static void *mpegl_get_proc_address(void *ctx, const char *name)
{
void *p = eglGetProcAddress(name);
#if defined(__GLIBC__) && HAVE_LIBDL
// Some crappy ARM/Linux things do not provide EGL 1.5, so above call does
// not necessarily return function pointers for core functions. Try to get
// them from a loaded GLES lib. As POSIX leaves RTLD_DEFAULT "reserved",
// use it only with glibc.
if (!p)
p = dlsym(RTLD_DEFAULT, name);
#endif
return p;
}
// Load gl version and function pointers into *gl.
// Expects a current EGL context set.
void mpegl_load_functions(struct GL *gl, struct mp_log *log)
{
const char *egl_exts = "";
EGLDisplay display = eglGetCurrentDisplay();
if (display != EGL_NO_DISPLAY)
egl_exts = eglQueryString(display, EGL_EXTENSIONS);
mpgl_load_functions2(gl, mpegl_get_proc_address, NULL, egl_exts, log);
}
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