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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/>.
*/
#ifndef MP_GL_CONTEXT_H_
#define MP_GL_CONTEXT_H_
#include "common.h"
enum {
VOFLAG_GLES = 1 << 0, // Hint to create a GLES context
VOFLAG_NO_GLES = 1 << 1, // Hint to create a desktop GL context
VOFLAG_GL_DEBUG = 1 << 2, // Hint to request debug OpenGL context
VOFLAG_ALPHA = 1 << 3, // Hint to request alpha framebuffer
VOFLAG_SW = 1 << 4, // Hint to accept a software GL renderer
VOFLAG_PROBING = 1 << 6, // The backend is being auto-probed.
VOFLAG_GLES2 = 1 << 7, // Hint for GLESv2 (needs VOFLAG_GLES)
};
extern const int mpgl_preferred_gl_versions[];
struct MPGLContext;
// A windowing backend (like X11, win32, ...), which provides OpenGL rendering.
struct mpgl_driver {
const char *name;
// Size of the struct allocated for MPGLContext.priv
int priv_size;
// Init the GL context and possibly the underlying VO backend.
// The created context should be compatible to GL 3.2 core profile, but
// some other GL versions are supported as well (e.g. GL 2.1 or GLES 2).
// Return 0 on success, negative value (-1) on error.
int (*init)(struct MPGLContext *ctx, int vo_flags);
// Resize the window, or create a new window if there isn't one yet.
// Currently, there is an unfortunate interaction with ctx->vo, and
// display size etc. are determined by it.
// Return 0 on success, negative value (-1) on error.
int (*reconfig)(struct MPGLContext *ctx);
// Called when rendering starts. The backend can map or resize the
// framebuffer, or update GL.main_fb. swap_buffers() ends the frame.
// Optional.
void (*start_frame)(struct MPGLContext *ctx);
// Present the frame.
void (*swap_buffers)(struct MPGLContext *ctx);
// This behaves exactly like vo_driver.control().
int (*control)(struct MPGLContext *ctx, int *events, int request, void *arg);
// These behave exactly like vo_driver.wakeup/wait_events. They are
// optional.
void (*wakeup)(struct MPGLContext *ctx);
void (*wait_events)(struct MPGLContext *ctx, int64_t until_time_us);
// Destroy the GL context and possibly the underlying VO backend.
void (*uninit)(struct MPGLContext *ctx);
};
typedef struct MPGLContext {
GL *gl;
struct vo *vo;
const struct mpgl_driver *driver;
struct mpv_global *global;
struct mp_log *log;
// For hwdec_vaegl.c.
const char *native_display_type;
void *native_display;
// Flip the rendered image vertically. This is useful for dxinterop.
bool flip_v;
// framebuffer to render to (normally 0)
GLuint main_fb;
// For free use by the mpgl_driver.
void *priv;
} MPGLContext;
MPGLContext *mpgl_init(struct vo *vo, const char *backend_name, int vo_flags);
void mpgl_uninit(MPGLContext *ctx);
int mpgl_reconfig_window(struct MPGLContext *ctx);
int mpgl_control(struct MPGLContext *ctx, int *events, int request, void *arg);
void mpgl_start_frame(struct MPGLContext *ctx);
void mpgl_swap_buffers(struct MPGLContext *ctx);
int mpgl_find_backend(const char *name);
struct m_option;
int mpgl_validate_backend_opt(struct mp_log *log, const struct m_option *opt,
struct bstr name, struct bstr param);
#endif
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