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/shader_cache.h b/video/out/gpu/shader_cache.h
new file mode 100644
index 0000000000..82a078079b
--- /dev/null
+++ b/video/out/gpu/shader_cache.h
@@ -0,0 +1,56 @@
+#pragma once
+
+#include "common/common.h"
+#include "misc/bstr.h"
+#include "ra.h"
+
+// For mp_pass_perf
+#include "video/out/vo.h"
+
+struct mp_log;
+struct mpv_global;
+struct gl_shader_cache;
+
+struct gl_shader_cache *gl_sc_create(struct ra *ra, struct mpv_global *global,
+                                     struct mp_log *log);
+void gl_sc_destroy(struct gl_shader_cache *sc);
+bool gl_sc_error_state(struct gl_shader_cache *sc);
+void gl_sc_reset_error(struct gl_shader_cache *sc);
+void gl_sc_add(struct gl_shader_cache *sc, const char *text);
+void gl_sc_addf(struct gl_shader_cache *sc, const char *textf, ...)
+    PRINTF_ATTRIBUTE(2, 3);
+void gl_sc_hadd(struct gl_shader_cache *sc, const char *text);
+void gl_sc_haddf(struct gl_shader_cache *sc, const char *textf, ...)
+    PRINTF_ATTRIBUTE(2, 3);
+void gl_sc_hadd_bstr(struct gl_shader_cache *sc, struct bstr text);
+void gl_sc_paddf(struct gl_shader_cache *sc, const char *textf, ...)
+    PRINTF_ATTRIBUTE(2, 3);
+void gl_sc_uniform_texture(struct gl_shader_cache *sc, char *name,
+                           struct ra_tex *tex);
+void gl_sc_uniform_image2D_wo(struct gl_shader_cache *sc, const char *name,
+                              struct ra_tex *tex);
+void gl_sc_ssbo(struct gl_shader_cache *sc, char *name, struct ra_buf *buf,
+                char *format, ...) PRINTF_ATTRIBUTE(4, 5);
+void gl_sc_uniform_f(struct gl_shader_cache *sc, char *name, float f);
+void gl_sc_uniform_i(struct gl_shader_cache *sc, char *name, int f);
+void gl_sc_uniform_vec2(struct gl_shader_cache *sc, char *name, float f[2]);
+void gl_sc_uniform_vec3(struct gl_shader_cache *sc, char *name, float f[3]);
+void gl_sc_uniform_mat2(struct gl_shader_cache *sc, char *name,
+                        bool transpose, float *v);
+void gl_sc_uniform_mat3(struct gl_shader_cache *sc, char *name,
+                        bool transpose, float *v);
+void gl_sc_set_vertex_format(struct gl_shader_cache *sc,
+                             const struct ra_renderpass_input *vertex_attribs,
+                             int vertex_stride);
+void gl_sc_blend(struct gl_shader_cache *sc,
+                 enum ra_blend blend_src_rgb,
+                 enum ra_blend blend_dst_rgb,
+                 enum ra_blend blend_src_alpha,
+                 enum ra_blend blend_dst_alpha);
+void gl_sc_enable_extension(struct gl_shader_cache *sc, char *name);
+struct mp_pass_perf gl_sc_dispatch_draw(struct gl_shader_cache *sc,
+                                        struct ra_tex *target,
+                                        void *ptr, size_t num);
+struct mp_pass_perf gl_sc_dispatch_compute(struct gl_shader_cache *sc,
+                                           int w, int h, int d);
+void gl_sc_set_cache_dir(struct gl_shader_cache *sc, const char *dir);