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https://github.com/mpv-player/mpv
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8fb9cc2534
In some cases, such as when using the libmpv opengl-cb API, or with certain vo_opengl backends, the main framebuffer is never accessed. Instead, rendering is done to a FBO that acts as back buffer. This meant an incorrect/broken bit depth could be used for dithering. Change it to read the framebuffer depth lazily on the first render call. Also move the main FBO field out of the GL struct to MPGLContext, because the renderer's init function does not need to access it anymore.
111 lines
3.9 KiB
C
111 lines
3.9 KiB
C
/*
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* common OpenGL routines
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*
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* copyleft (C) 2005-2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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* Special thanks go to the xine team and Matthias Hopf, whose video_out_opengl.c
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* gave me lots of good ideas.
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*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MP_GL_CONTEXT_H_
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#define MP_GL_CONTEXT_H_
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#include "common.h"
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enum {
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VOFLAG_GLES = 1 << 0, // Hint to create a GLES context
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VOFLAG_NO_GLES = 1 << 1, // Hint to create a desktop GL context
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VOFLAG_GL_DEBUG = 1 << 2, // Hint to request debug OpenGL context
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VOFLAG_ALPHA = 1 << 3, // Hint to request alpha framebuffer
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VOFLAG_SW = 1 << 4, // Hint to accept a software GL renderer
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VOFLAG_PROBING = 1 << 6, // The backend is being auto-probed.
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VOFLAG_GLES2 = 1 << 7, // Hint for GLESv2 (needs VOFLAG_GLES)
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};
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extern const int mpgl_preferred_gl_versions[];
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struct MPGLContext;
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// A windowing backend (like X11, win32, ...), which provides OpenGL rendering.
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struct mpgl_driver {
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const char *name;
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// Size of the struct allocated for MPGLContext.priv
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int priv_size;
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// Init the GL context and possibly the underlying VO backend.
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// The created context should be compatible to GL 3.2 core profile, but
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// some other GL versions are supported as well (e.g. GL 2.1 or GLES 2).
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// Return 0 on success, negative value (-1) on error.
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int (*init)(struct MPGLContext *ctx, int vo_flags);
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// Resize the window, or create a new window if there isn't one yet.
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// Currently, there is an unfortunate interaction with ctx->vo, and
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// display size etc. are determined by it.
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// Return 0 on success, negative value (-1) on error.
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int (*reconfig)(struct MPGLContext *ctx);
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// Present the frame.
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void (*swap_buffers)(struct MPGLContext *ctx);
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// This behaves exactly like vo_driver.control().
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int (*control)(struct MPGLContext *ctx, int *events, int request, void *arg);
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// These behave exactly like vo_driver.wakeup/wait_events. They are
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// optional.
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void (*wakeup)(struct MPGLContext *ctx);
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void (*wait_events)(struct MPGLContext *ctx, int64_t until_time_us);
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// Destroy the GL context and possibly the underlying VO backend.
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void (*uninit)(struct MPGLContext *ctx);
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};
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typedef struct MPGLContext {
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GL *gl;
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struct vo *vo;
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const struct mpgl_driver *driver;
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struct mpv_global *global;
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struct mp_log *log;
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// For hwdec_vaegl.c.
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const char *native_display_type;
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void *native_display;
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// Flip the rendered image vertically. This is useful for dxinterop.
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bool flip_v;
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// framebuffer to render to (normally 0)
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GLuint main_fb;
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// For free use by the mpgl_driver.
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void *priv;
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} MPGLContext;
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MPGLContext *mpgl_init(struct vo *vo, const char *backend_name, int vo_flags);
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void mpgl_uninit(MPGLContext *ctx);
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int mpgl_reconfig_window(struct MPGLContext *ctx);
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int mpgl_control(struct MPGLContext *ctx, int *events, int request, void *arg);
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void mpgl_swap_buffers(struct MPGLContext *ctx);
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int mpgl_find_backend(const char *name);
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struct m_option;
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int mpgl_validate_backend_opt(struct mp_log *log, const struct m_option *opt,
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struct bstr name, struct bstr param);
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#endif
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