vo_opengl: refactor into vo_gpu

This is done in several steps:

1. refactor MPGLContext -> struct ra_ctx
2. move GL-specific stuff in vo_opengl into opengl/context.c
3. generalize context creation to support other APIs, and add --gpu-api
4. rename all of the --opengl- options that are no longer opengl-specific
5. move all of the stuff from opengl/* that isn't GL-specific into gpu/
   (note: opengl/gl_utils.h became opengl/utils.h)
6. rename vo_opengl to vo_gpu
7. to handle window screenshots, the short-term approach was to just add
   it to ra_swchain_fns. Long term (and for vulkan) this has to be moved to
   ra itself (and vo_gpu altered to compensate), but this was a stop-gap
   measure to prevent this commit from getting too big
8. move ra->fns->flush to ra_gl_ctx instead
9. some other minor changes that I've probably already forgotten

Note: This is one half of a major refactor, the other half of which is
provided by rossy's following commit. This commit enables support for
all linux platforms, while his version enables support for all non-linux
platforms.

Note 2: vo_opengl_cb.c also re-uses ra_gl_ctx so it benefits from the
--opengl- options like --opengl-early-flush, --opengl-finish etc. Should
be a strict superset of the old functionality.

Disclaimer: Since I have no way of compiling mpv on all platforms, some
of these ports were done blindly. Specifically, the blind ports included
context_mali_fbdev.c and context_rpi.c. Since they're both based on
egl_helpers, the port should have gone smoothly without any major
changes required. But if somebody complains about a compile error on
those platforms (assuming anybody actually uses them), you know where to
complain.

1 files changed, 56 insertions, 0 deletions

diff --git a/video/out/gpu/video_shaders.h b/video/out/gpu/video_shaders.h
new file mode 100644
index 0000000000..8345e4c598
--- /dev/null
+++ b/video/out/gpu/video_shaders.h
@@ -0,0 +1,56 @@
+/*
+ * 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_VIDEO_SHADERS_H
+#define MP_GL_VIDEO_SHADERS_H
+
+#include <libavutil/lfg.h>
+
+#include "utils.h"
+#include "video.h"
+
+extern const struct deband_opts deband_opts_def;
+extern const struct m_sub_options deband_conf;
+
+void sampler_prelude(struct gl_shader_cache *sc, int tex_num);
+void pass_sample_separated_gen(struct gl_shader_cache *sc, struct scaler *scaler,
+                               int d_x, int d_y);
+void pass_sample_polar(struct gl_shader_cache *sc, struct scaler *scaler,
+                       int components, int glsl_version);
+void pass_compute_polar(struct gl_shader_cache *sc, struct scaler *scaler,
+                        int components, int bw, int bh, int iw, int ih);
+void pass_sample_bicubic_fast(struct gl_shader_cache *sc);
+void pass_sample_oversample(struct gl_shader_cache *sc, struct scaler *scaler,
+                            int w, int h);
+
+void pass_linearize(struct gl_shader_cache *sc, enum mp_csp_trc trc);
+void pass_delinearize(struct gl_shader_cache *sc, enum mp_csp_trc trc);
+void pass_ootf(struct gl_shader_cache *sc, enum mp_csp_light light, float peak);
+void pass_inverse_ootf(struct gl_shader_cache *sc, enum mp_csp_light light, float peak);
+
+void pass_color_map(struct gl_shader_cache *sc,
+                    struct mp_colorspace src, struct mp_colorspace dst,
+                    enum tone_mapping algo, float tone_mapping_param,
+                    float tone_mapping_desat, bool use_detected_peak,
+                    bool gamut_warning, bool is_linear);
+
+void pass_sample_deband(struct gl_shader_cache *sc, struct deband_opts *opts,
+                        AVLFG *lfg, enum mp_csp_trc trc);
+
+void pass_sample_unsharp(struct gl_shader_cache *sc, float param);
+
+#endif