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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 "video/filter/vf_gpu.h"
#include "video/out/opengl/egl_helpers.h"
#include "video/out/opengl/ra_gl.h"
struct gl_offscreen_ctx {
GL gl;
EGLDisplay egl_display;
EGLContext egl_context;
};
static void gl_ctx_destroy(void *p)
{
struct offscreen_ctx *ctx = p;
struct gl_offscreen_ctx *gl = ctx->priv;
ra_free(&ctx->ra);
if (gl->egl_context)
eglDestroyContext(gl->egl_display, gl->egl_context);
}
static void gl_ctx_set_context(struct offscreen_ctx *ctx, bool enable)
{
struct gl_offscreen_ctx *gl = ctx->priv;
EGLContext c = enable ? gl->egl_context : EGL_NO_CONTEXT;
if (!eglMakeCurrent(gl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, c))
MP_ERR(ctx, "Could not make EGL context current.\n");
}
static struct offscreen_ctx *gl_offscreen_ctx_create(struct mpv_global *global,
struct mp_log *log)
{
struct offscreen_ctx *ctx = talloc(NULL, struct offscreen_ctx);
struct gl_offscreen_ctx *gl = talloc_zero(ctx, struct gl_offscreen_ctx);
talloc_set_destructor(ctx, gl_ctx_destroy);
*ctx = (struct offscreen_ctx){
.log = log,
.priv = gl,
.set_context = gl_ctx_set_context,
};
// This appears to work with Mesa. EGL 1.5 doesn't specify what a "default
// display" is at all.
gl->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (!eglInitialize(gl->egl_display, NULL, NULL)) {
MP_ERR(ctx, "Could not initialize EGL.\n");
goto error;
}
// Unfortunately, mpegl_create_context() is entangled with ra_ctx.
// Fortunately, it does not need much, and we can provide a stub.
struct ra_ctx ractx = {
.log = ctx->log,
.global = global,
};
EGLConfig config;
if (!mpegl_create_context(&ractx, gl->egl_display, &gl->egl_context, &config))
{
MP_ERR(ctx, "Could not create EGL context.\n");
goto error;
}
if (!eglMakeCurrent(gl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
gl->egl_context))
{
MP_ERR(ctx, "Could not make EGL context current.\n");
goto error;
}
mpegl_load_functions(&gl->gl, ctx->log);
ctx->ra = ra_create_gl(&gl->gl, ctx->log);
if (!ctx->ra)
goto error;
gl_ctx_set_context(ctx, false);
return ctx;
error:
talloc_free(ctx);
return NULL;
}
const struct offscreen_context offscreen_egl = {
.api = "egl",
.offscreen_ctx_create = gl_offscreen_ctx_create
};
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