vo_opengl: disable scalers on ES2

Even if everything else is available, the need for first class arrays
breaks it. In theory we could fix this since we don't strictly need
them, but I guess it's not worth bothering.

Also give the misnamed have_mix variable a slightly better name.

1 files changed, 6 insertions, 4 deletions

diff --git a/video/out/opengl/video.c b/video/out/opengl/video.c
index cf1a5c9432..d580596e9e 100644
--- a/video/out/opengl/video.c
+++ b/video/out/opengl/video.c
@@ -2553,7 +2553,7 @@ static void check_gl_features(struct gl_video *p)
     GL *gl = p->gl;
     bool have_float_tex = !!gl_find_float16_format(gl, 1);
     bool have_3d_tex = gl->mpgl_caps & MPGL_CAP_3D_TEX;
-    bool have_mix = gl->glsl_version >= 130;
+    bool have_mglsl = gl->glsl_version >= 130; // modern GLSL (1st class arrays etc.)
     bool have_texrg = gl->mpgl_caps & MPGL_CAP_TEX_RG;
 
     if (!p->opts.fbo_format) {
@@ -2609,6 +2609,8 @@ static void check_gl_features(struct gl_video *p)
             char *reason = NULL;
             if (!have_float_tex)
                 reason = "(float tex. missing)";
+            if (!have_mglsl)
+                reason = "(GLSL version too old)";
             if (reason) {
                 p->opts.scaler[n].kernel.name = "bilinear";
                 MP_WARN(p, "Disabling scaler #%d %s.\n", n, reason);
@@ -2629,18 +2631,18 @@ static void check_gl_features(struct gl_video *p)
                   p->opts.target_trc != MP_CSP_TRC_AUTO || p->use_lut_3d;
 
     // mix() is needed for some gamma functions
-    if (!have_mix && (p->opts.linear_scaling || p->opts.sigmoid_upscaling)) {
+    if (!have_mglsl && (p->opts.linear_scaling || p->opts.sigmoid_upscaling)) {
         p->opts.linear_scaling = false;
         p->opts.sigmoid_upscaling = false;
         MP_WARN(p, "Disabling linear/sigmoid scaling (GLSL version too old).\n");
     }
-    if (!have_mix && use_cms) {
+    if (!have_mglsl && use_cms) {
         p->opts.target_prim = MP_CSP_PRIM_AUTO;
         p->opts.target_trc = MP_CSP_TRC_AUTO;
         p->use_lut_3d = false;
         MP_WARN(p, "Disabling color management (GLSL version too old).\n");
     }
-    if (!have_mix && p->opts.deband) {
+    if (!have_mglsl && p->opts.deband) {
         p->opts.deband = 0;
         MP_WARN(p, "Disabling debanding (GLSL version too old).\n");
     }