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/*
* common OpenGL routines
*
* copyleft (C) 2005-2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
* Special thanks go to the xine team and Matthias Hopf, whose video_out_opengl.c
* gave me lots of good ideas.
*
* 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 <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#include <assert.h>
#include "context.h"
#include "common/common.h"
#include "options/options.h"
#include "options/m_option.h"
extern const struct mpgl_driver mpgl_driver_x11;
extern const struct mpgl_driver mpgl_driver_x11egl;
extern const struct mpgl_driver mpgl_driver_x11_probe;
extern const struct mpgl_driver mpgl_driver_drm_egl;
extern const struct mpgl_driver mpgl_driver_drm;
extern const struct mpgl_driver mpgl_driver_cocoa;
extern const struct mpgl_driver mpgl_driver_wayland;
extern const struct mpgl_driver mpgl_driver_w32;
extern const struct mpgl_driver mpgl_driver_angle;
extern const struct mpgl_driver mpgl_driver_angle_es2;
extern const struct mpgl_driver mpgl_driver_dxinterop;
extern const struct mpgl_driver mpgl_driver_rpi;
extern const struct mpgl_driver mpgl_driver_mali;
static const struct mpgl_driver *const backends[] = {
#if HAVE_RPI
&mpgl_driver_rpi,
#endif
#if HAVE_GL_COCOA
&mpgl_driver_cocoa,
#endif
#if HAVE_EGL_ANGLE
&mpgl_driver_angle,
&mpgl_driver_angle_es2,
#endif
#if HAVE_GL_WIN32
&mpgl_driver_w32,
#endif
#if HAVE_GL_DXINTEROP
&mpgl_driver_dxinterop,
#endif
#if HAVE_GL_WAYLAND
&mpgl_driver_wayland,
#endif
#if HAVE_GL_X11
&mpgl_driver_x11_probe,
#endif
#if HAVE_EGL_X11
&mpgl_driver_x11egl,
#endif
#if HAVE_GL_X11
&mpgl_driver_x11,
#endif
#if HAVE_EGL_DRM
&mpgl_driver_drm,
&mpgl_driver_drm_egl,
#endif
#if HAVE_MALI_FBDEV
&mpgl_driver_mali,
#endif
};
// 0-terminated list of desktop GL versions a backend should try to
// initialize. The first entry is the most preferred version.
const int mpgl_preferred_gl_versions[] = {
330,
320,
310,
300,
210,
0
};
int mpgl_find_backend(const char *name)
{
if (name == NULL || strcmp(name, "auto") == 0)
return -1;
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) {
if (strcmp(backends[n]->name, name) == 0)
return n;
}
return -2;
}
int mpgl_validate_backend_opt(struct mp_log *log, const struct m_option *opt,
struct bstr name, struct bstr param)
{
if (bstr_equals0(param, "help")) {
mp_info(log, "OpenGL windowing backends:\n");
mp_info(log, " auto (autodetect)\n");
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++)
mp_info(log, " %s\n", backends[n]->name);
return M_OPT_EXIT;
}
char s[20];
snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
return mpgl_find_backend(s) >= -1 ? 1 : M_OPT_INVALID;
}
#if HAVE_C11_TLS
#define MP_TLS _Thread_local
#elif HAVE_GCC_TLS
#define MP_TLS __thread
#endif
#ifdef MP_TLS
static MP_TLS MPGLContext *current_context;
static void * GLAPIENTRY get_native_display(const char *name)
{
if (current_context && current_context->native_display_type &&
name && strcmp(current_context->native_display_type, name) == 0)
return current_context->native_display;
return NULL;
}
static void set_current_context(MPGLContext *context)
{
current_context = context;
if (context && !context->gl->MPGetNativeDisplay)
context->gl->MPGetNativeDisplay = get_native_display;
}
#else
static void set_current_context(MPGLContext *context)
{
}
#endif
static MPGLContext *init_backend(struct vo *vo, const struct mpgl_driver *driver,
bool probing, int vo_flags)
{
MPGLContext *ctx = talloc_ptrtype(NULL, ctx);
*ctx = (MPGLContext) {
.gl = talloc_zero(ctx, GL),
.vo = vo,
.driver = driver,
};
if (probing)
vo_flags |= VOFLAG_PROBING;
bool old_probing = vo->probing;
vo->probing = probing; // hack; kill it once backends are separate
MP_VERBOSE(vo, "Initializing OpenGL backend '%s'\n", ctx->driver->name);
ctx->priv = talloc_zero_size(ctx, ctx->driver->priv_size);
if (ctx->driver->init(ctx, vo_flags) < 0) {
vo->probing = old_probing;
talloc_free(ctx);
return NULL;
}
vo->probing = old_probing;
if (!ctx->gl->version && !ctx->gl->es)
goto cleanup;
if (probing && ctx->gl->es && (vo_flags & VOFLAG_NO_GLES)) {
MP_VERBOSE(ctx->vo, "Skipping GLES backend.\n");
goto cleanup;
}
if (ctx->gl->mpgl_caps & MPGL_CAP_SW) {
MP_WARN(ctx->vo, "Suspected software renderer or indirect context.\n");
if (vo->probing && !(vo_flags & VOFLAG_SW))
goto cleanup;
}
ctx->gl->debug_context = !!(vo_flags & VOFLAG_GL_DEBUG);
set_current_context(ctx);
return ctx;
cleanup:
mpgl_uninit(ctx);
return NULL;
}
// Create a VO window and create a GL context on it.
// vo_flags: passed to the backend's create window function
MPGLContext *mpgl_init(struct vo *vo, const char *backend_name, int vo_flags)
{
MPGLContext *ctx = NULL;
int index = mpgl_find_backend(backend_name);
if (index == -1) {
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) {
ctx = init_backend(vo, backends[n], true, vo_flags);
if (ctx)
break;
}
// VO forced, but no backend is ok => force the first that works at all
if (!ctx && !vo->probing) {
for (int n = 0; n < MP_ARRAY_SIZE(backends); n++) {
ctx = init_backend(vo, backends[n], false, vo_flags);
if (ctx)
break;
}
}
} else if (index >= 0) {
ctx = init_backend(vo, backends[index], false, vo_flags);
}
return ctx;
}
int mpgl_reconfig_window(struct MPGLContext *ctx)
{
return ctx->driver->reconfig(ctx);
}
int mpgl_control(struct MPGLContext *ctx, int *events, int request, void *arg)
{
return ctx->driver->control(ctx, events, request, arg);
}
void mpgl_swap_buffers(struct MPGLContext *ctx)
{
ctx->driver->swap_buffers(ctx);
}
void mpgl_uninit(MPGLContext *ctx)
{
set_current_context(NULL);
if (ctx)
ctx->driver->uninit(ctx);
talloc_free(ctx);
}
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