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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 "common/common.h"
#include "egl_helpers.h"
#include "common.h"
#include "context.h"
// 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
static bool create_context(EGLDisplay display, struct mp_log *log, bool probing,
int vo_flags, bool es3,
EGLContext *out_context, EGLConfig *out_config)
{
int msgl = probing ? MSGL_V : MSGL_FATAL;
bool es = vo_flags & VOFLAG_GLES;
EGLenum api = EGL_OPENGL_API;
EGLint rend = EGL_OPENGL_BIT;
const char *name = "Desktop OpenGL";
if (es) {
api = EGL_OPENGL_ES_API;
rend = EGL_OPENGL_ES2_BIT;
name = "GLES 2.0";
}
if (es3) {
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, (vo_flags & VOFLAG_ALPHA ) ? 1 : 0,
EGL_DEPTH_SIZE, 0,
EGL_RENDERABLE_TYPE, rend,
EGL_NONE
};
EGLint config_count;
EGLConfig config;
eglChooseConfig(display, attributes, &config, 1, &config_count);
if (!config_count) {
mp_msg(log, msgl, "Could not find EGL configuration!\n");
return false;
}
EGLContext *ctx = NULL;
if (es) {
EGLint attrs[] = {
EGL_CONTEXT_CLIENT_VERSION, es3 ? 3 : 2,
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)
{
*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));
int clean_flags = vo_flags & ~(unsigned)(VOFLAG_GLES | VOFLAG_NO_GLES);
bool probing = vo_flags & VOFLAG_PROBING;
int msgl = probing ? MSGL_V : MSGL_FATAL;
bool try_desktop = !(vo_flags & VOFLAG_NO_GLES);
if (!(vo_flags & VOFLAG_GLES)) {
// Desktop OpenGL
if (create_context(display, log, try_desktop | probing, clean_flags, false,
out_context, out_config))
return true;
}
if (try_desktop) {
// ES 3.x
if (create_context(display, log, true, clean_flags | VOFLAG_GLES, true,
out_context, out_config))
return true;
// ES 2.0
if (create_context(display, log, probing, clean_flags | VOFLAG_GLES, false,
out_context, out_config))
return true;
}
mp_msg(log, msgl, "Could not create a GL context.\n");
return false;
}
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