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, 24 insertions, 23 deletions

diff --git a/wscript_build.py b/wscript_build.py
index 2f6c08bc0a..8dab6012c0 100644
--- a/wscript_build.py
+++ b/wscript_build.py
@@ -385,45 +385,46 @@ def build(ctx):
         ( "video/out/dither.c" ),
         ( "video/out/filter_kernels.c" ),
         ( "video/out/opengl/angle_dynamic.c",    "egl-angle" ),
+        ( "video/out/gpu/context.c",             "gpu" ),
+        ( "video/out/gpu/hwdec.c",               "gpu" ),
+        ( "video/out/gpu/lcms.c",                "gpu" ),
+        ( "video/out/gpu/osd.c",                 "gpu" ),
+        ( "video/out/gpu/ra.c",                  "gpu" ),
+        ( "video/out/gpu/shader_cache.c",        "gpu" ),
+        ( "video/out/gpu/user_shaders.c",        "gpu" ),
+        ( "video/out/gpu/utils.c",               "gpu" ),
+        ( "video/out/gpu/video.c",               "gpu" ),
+        ( "video/out/gpu/video_shaders.c",       "gpu" ),
         ( "video/out/opengl/common.c",           "gl" ),
+        ( "video/out/opengl/formats.c",          "gl" ),
+        ( "video/out/opengl/utils.c",            "gl" ),
+        ( "video/out/opengl/ra_gl.c",            "gl" ),
         ( "video/out/opengl/context.c",          "gl" ),
-        ( "video/out/opengl/context_angle.c",    "egl-angle-win32" ),
-        ( "video/out/opengl/context_cocoa.c",    "gl-cocoa" ),
+#       ( "video/out/opengl/context_angle.c",    "egl-angle-win32" ),
+#       ( "video/out/opengl/context_cocoa.c",    "gl-cocoa" ),
         ( "video/out/opengl/context_drm_egl.c",  "egl-drm" ),
-        ( "video/out/opengl/context_dxinterop.c","gl-dxinterop" ),
+#       ( "video/out/opengl/context_dxinterop.c","gl-dxinterop" ),
         ( "video/out/opengl/context_mali_fbdev.c","mali-fbdev" ),
         ( "video/out/opengl/context_rpi.c",      "rpi" ),
         ( "video/out/opengl/context_vdpau.c",    "vdpau-gl-x11" ),
         ( "video/out/opengl/context_wayland.c",  "gl-wayland" ),
-        ( "video/out/opengl/context_w32.c",      "gl-win32" ),
-        ( "video/out/opengl/context_x11.c",      "gl-x11" ),
+#       ( "video/out/opengl/context_w32.c",      "gl-win32" ),
+        ( "video/out/opengl/context_glx.c",      "gl-x11" ),
         ( "video/out/opengl/context_x11egl.c",   "egl-x11" ),
         ( "video/out/opengl/cuda_dynamic.c",     "cuda-hwaccel" ),
-        ( "video/out/opengl/d3d11_helpers.c",    "egl-angle-win32" ),
+#       ( "video/out/opengl/d3d11_helpers.c",    "egl-angle-win32" ),
         ( "video/out/opengl/egl_helpers.c",      "egl-helpers" ),
-        ( "video/out/opengl/formats.c",          "gl" ),
-        ( "video/out/opengl/gl_utils.c",         "gl" ),
-        ( "video/out/opengl/hwdec.c",            "gl" ),
         ( "video/out/opengl/hwdec_cuda.c",       "cuda-hwaccel" ),
-        ( "video/out/opengl/hwdec_d3d11egl.c",   "d3d-hwaccel" ),
-        ( "video/out/opengl/hwdec_d3d11eglrgb.c","d3d-hwaccel" ),
-        ( "video/out/opengl/hwdec_dxva2gldx.c",  "gl-dxinterop-d3d9" ),
-        ( "video/out/opengl/hwdec_dxva2egl.c",   "d3d9-hwaccel" ),
+#       ( "video/out/opengl/hwdec_d3d11egl.c",   "d3d-hwaccel" ),
+#       ( "video/out/opengl/hwdec_d3d11eglrgb.c","d3d-hwaccel" ),
+#       ( "video/out/opengl/hwdec_dxva2gldx.c",  "gl-dxinterop-d3d9" ),
+#       ( "video/out/opengl/hwdec_dxva2egl.c",   "d3d9-hwaccel" ),
         ( "video/out/opengl/hwdec_osx.c",        "videotoolbox-gl" ),
         ( "video/out/opengl/hwdec_ios.m",        "ios-gl" ),
         ( "video/out/opengl/hwdec_rpi.c",        "rpi" ),
         ( "video/out/opengl/hwdec_vaegl.c",      "vaapi-egl" ),
         ( "video/out/opengl/hwdec_vaglx.c",      "vaapi-glx" ),
         ( "video/out/opengl/hwdec_vdpau.c",      "vdpau-gl-x11" ),
-        ( "video/out/opengl/lcms.c",             "gl" ),
-        ( "video/out/opengl/osd.c",              "gl" ),
-        ( "video/out/opengl/ra.c",               "gl" ),
-        ( "video/out/opengl/ra_gl.c",            "gl" ),
-        ( "video/out/opengl/shader_cache.c",     "gl" ),
-        ( "video/out/opengl/user_shaders.c",     "gl" ),
-        ( "video/out/opengl/utils.c",            "gl" ),
-        ( "video/out/opengl/video.c",            "gl" ),
-        ( "video/out/opengl/video_shaders.c",    "gl" ),
         ( "video/out/vo.c" ),
         ( "video/out/vo_caca.c",                 "caca" ),
         ( "video/out/vo_drm.c",                  "drm" ),
@@ -432,7 +433,7 @@ def build(ctx):
         ( "video/out/vo_lavc.c",                 "encoding" ),
         ( "video/out/vo_rpi.c",                  "rpi" ),
         ( "video/out/vo_null.c" ),
-        ( "video/out/vo_opengl.c",               "gl" ),
+        ( "video/out/vo_gpu.c",                  "gpu" ),
         ( "video/out/vo_opengl_cb.c",            "gl" ),
         ( "video/out/vo_sdl.c",                  "sdl2" ),
         ( "video/out/vo_tct.c" ),