vo_opengl: make PBOs work on GLES 3.x

For some reason, GLES has no glMapBuffer, only glMapBufferRange.

GLES 2 has no buffer mapping at all, and GL 2.1 does not always have
glMapBufferRange. On those PBOs remain unsupported (there's no reason to
care about GL 2.1 without the extension).

This doesn't actually work on ANGLE, and I have no idea why. (There are
artifacts on OSD, as if parts of the OSD data weren't copied.) It works
on desktop OpenGL and at least 1 other ES 3 implementation. Don't enable
it on ANGLE, I guess.

1 files changed, 11 insertions, 1 deletions

diff --git a/video/out/opengl/common.c b/video/out/opengl/common.c
index 6287fc488b..7121522f4b 100644
--- a/video/out/opengl/common.c
+++ b/video/out/opengl/common.c
@@ -147,13 +147,22 @@ static const struct gl_functions gl_functions[] = {
         .provides = MPGL_CAP_ROW_LENGTH | MPGL_CAP_1D_TEX,
         .functions = (const struct gl_function[]) {
             DEF_FN(GetTexLevelParameteriv),
-            DEF_FN(MapBuffer),
             DEF_FN(ReadBuffer),
             DEF_FN(TexImage1D),
             DEF_FN(UnmapBuffer),
             {0}
         },
     },
+    // GL 2.1 has this as extension only.
+    {
+        .ver_exclude = 300,
+        .ver_es_exclude = 300,
+        .extension = "GL_ARB_map_buffer_range",
+        .functions = (const struct gl_function[]) {
+            DEF_FN(MapBufferRange),
+            {0}
+        },
+    },
     // GL 3.0+ and ES 3.x core only functions.
     {
         .ver_core = 300,
@@ -162,6 +171,7 @@ static const struct gl_functions gl_functions[] = {
             DEF_FN(BindBufferBase),
             DEF_FN(BlitFramebuffer),
             DEF_FN(GetStringi),
+            DEF_FN(MapBufferRange),
             // for ES 3.0
             DEF_FN(ReadBuffer),
             DEF_FN(UnmapBuffer),