vo_opengl: split backend code from common.c to context.c

Now common.c only contains the code for the function loader, while
context.c contains the backend loader/dispatcher.

Not calling it "backend.c", because the central struct is called
MPGLContext.

1 files changed, 104 insertions, 0 deletions

diff --git a/video/out/opengl/context.h b/video/out/opengl/context.h
new file mode 100644
index 0000000000..d8f6538fca
--- /dev/null
+++ b/video/out/opengl/context.h
@@ -0,0 +1,104 @@
+/*
+ * 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 General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * You can alternatively redistribute this file 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.
+ */
+
+#ifndef MP_GL_CONTEXT_H_
+#define MP_GL_CONTEXT_H_
+
+#include "common.h"
+
+enum {
+    VOFLAG_GLES         = 1 << 0,       // Hint to create a GLES2 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
+};
+
+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);
+
+    // 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);
+
+    // 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;
+
+    // For hwdec_vaegl.c.
+    const char *native_display_type;
+    void *native_display;
+
+    // Windows-specific hack. See vo_opengl dwmflush suboption.
+    int dwm_flush_opt;
+
+    // Flip the rendered image vertically. This is useful for dxinterop.
+    bool flip_v;
+
+    // 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_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