spirv: remove --spirv-compiler=nvidia

This option has been deprecated upstream for a long time, probably
doesn't even work anymore, and won't work moving forwards as we replace
the vulkan code by libplacebo wrappers.

I haven't removed the option completely yet since in theory we could
still add support for e.g. a native glslang wrapper in the future. But
most likely the future of this code is deletion.

As an aside, fix an issue where the man page didn't mention d3d11.

6 files changed, 12 insertions, 70 deletions

diff --git a/DOCS/interface-changes.rst b/DOCS/interface-changes.rst
index 26f39beba7..cbc9af18f8 100644
--- a/DOCS/interface-changes.rst
+++ b/DOCS/interface-changes.rst
@@ -44,6 +44,9 @@ Interface changes
       `--linear-downscaling`. This means that `--sigmoid-upscaling` no longer
       implies linear light downscaling as well, which was confusing.
     - the built-in `gpu-hq` profile now includes` --linear-downscaling`.
+    - support for `--spirv-compiler=nvidia` has been removed, leaving `shaderc`
+      as the only option. The `--spirv-compiler` option itself has been marked
+      as deprecated, and may be removed in the future.
  --- mpv 0.29.0 ---
     - drop --opensles-sample-rate, as --audio-samplerate should be used if desired
     - drop deprecated --videotoolbox-format, --ff-aid, --ff-vid, --ff-sid,
diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index e8c548d3a7..2aaad5febc 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -4522,18 +4522,19 @@ The following video options are currently all specific to ``--vo=gpu`` and
 
 ``--spirv-compiler=<compiler>``
     Controls which compiler is used to translate GLSL to SPIR-V. This is
-    (currently) only relevant for ``--gpu-api=vulkan``. The possible choices
-    are:
+    (currently) only relevant for ``--gpu-api=vulkan`` and `--gpu-api=d3d11`.
+    The possible choices are currently only:
 
     auto
         Use the first available compiler. (Default)
     shaderc
         Use libshaderc, which is an API wrapper around glslang. This is
         generally the most preferred, if available.
-    nvidia
-        Use nvidia's built-in compiler. Only works for nvidia GPUs. Can be
-        buggy, but also supports some features glslang does not. Only works
-        with vulkan.
+
+    .. note::
+
+        This option is deprecated, since there is only one reasonable value.
+        It may be removed in the future.
 
 ``--glsl-shaders=<file-list>``
     Custom GLSL hooks. These are a flexible way to add custom fragment shaders,
diff --git a/video/out/gpu/spirv.c b/video/out/gpu/spirv.c
index 06d33686d0..ee11d601a3 100644
--- a/video/out/gpu/spirv.c
+++ b/video/out/gpu/spirv.c
@@ -5,22 +5,17 @@
 #include "config.h"
 
 extern const struct spirv_compiler_fns spirv_shaderc;
-extern const struct spirv_compiler_fns spirv_nvidia_builtin;
 
 // in probe-order
 enum {
     SPIRV_AUTO = 0,
     SPIRV_SHADERC, // generally preferred, but not packaged everywhere
-    SPIRV_NVIDIA,  // can be useful for testing, only available on nvidia
 };
 
 static const struct spirv_compiler_fns *compilers[] = {
 #if HAVE_SHADERC
     [SPIRV_SHADERC] = &spirv_shaderc,
 #endif
-#if HAVE_VULKAN
-    [SPIRV_NVIDIA]  = &spirv_nvidia_builtin,
-#endif
 };
 
 static const struct m_opt_choice_alternatives compiler_choices[] = {
@@ -28,9 +23,6 @@ static const struct m_opt_choice_alternatives compiler_choices[] = {
 #if HAVE_SHADERC
     {"shaderc",     SPIRV_SHADERC},
 #endif
-#if HAVE_VULKAN
-    {"nvidia",      SPIRV_NVIDIA},
-#endif
     {0}
 };
 
diff --git a/video/out/vulkan/spirv_nvidia.c b/video/out/vulkan/spirv_nvidia.c
deleted file mode 100644
index 6cc43a5619..0000000000
--- a/video/out/vulkan/spirv_nvidia.c
+++ /dev/null
@@ -1,54 +0,0 @@
-#include "video/out/gpu/spirv.h"
-
-#include "common.h"
-#include "context.h"
-#include "utils.h"
-
-static bool nv_glsl_compile(struct spirv_compiler *spirv, void *tactx,
-                            enum glsl_shader type, const char *glsl,
-                            struct bstr *out_spirv)
-{
-    // The nvidia extension literally assumes your SPIRV is in fact valid GLSL
-    *out_spirv = bstr0(glsl);
-    return true;
-}
-
-static bool nv_glsl_init(struct ra_ctx *ctx)
-{
-    struct mpvk_ctx *vk = ra_vk_ctx_get(ctx);
-    if (!vk)
-        return false;
-
-    struct spirv_compiler *spv = ctx->spirv;
-    spv->required_ext = VK_NV_GLSL_SHADER_EXTENSION_NAME;
-    spv->glsl_version = 450; // impossible to query, so hard-code it..
-    spv->ra_caps = RA_CAP_NESTED_ARRAY;
-
-    // Make sure the extension is actually available, and fail gracefully
-    // if it isn't
-    VkExtensionProperties *props = NULL;
-    uint32_t extnum = 0;
-    VK(vkEnumerateDeviceExtensionProperties(vk->physd, NULL, &extnum, NULL));
-    props = talloc_array(NULL, VkExtensionProperties, extnum);
-    VK(vkEnumerateDeviceExtensionProperties(vk->physd, NULL, &extnum, props));
-
-    bool ret = true;
-    for (int e = 0; e < extnum; e++) {
-        if (strncmp(props[e].extensionName, spv->required_ext,
-                    VK_MAX_EXTENSION_NAME_SIZE) == 0)
-            goto done;
-    }
-
-error:
-    MP_VERBOSE(ctx, "Device doesn't support VK_NV_glsl_shader, skipping..\n");
-    ret = false;
-
-done:
-    talloc_free(props);
-    return ret;
-}
-
-const struct spirv_compiler_fns spirv_nvidia_builtin = {
-    .compile_glsl = nv_glsl_compile,
-    .init = nv_glsl_init,
-};
diff --git a/wscript b/wscript
index db49f2f75b..d3d49090c8 100644
--- a/wscript
+++ b/wscript
@@ -806,7 +806,8 @@ video_output_features = [
                 "video outputs use --disable-gl.",
     }, {
         'name': '--vulkan',
-        'desc':  'Vulkan context support',
+        'desc': 'Vulkan context support',
+        'deps': 'shaderc',
         # Lowest version tested, Ubuntu 16.04's
         'func': check_pkg_config('vulkan >= 1.0.61'),
     }, {
diff --git a/wscript_build.py b/wscript_build.py
index 2b75383e34..7e63f6bdf8 100644
--- a/wscript_build.py
+++ b/wscript_build.py
@@ -501,7 +501,6 @@ def build(ctx):
         ( "video/out/vulkan/formats.c",          "vulkan" ),
         ( "video/out/vulkan/malloc.c",           "vulkan" ),
         ( "video/out/vulkan/ra_vk.c",            "vulkan" ),
-        ( "video/out/vulkan/spirv_nvidia.c",     "vulkan" ),
         ( "video/out/vulkan/utils.c",            "vulkan" ),
         ( "video/out/w32_common.c",              "win32-desktop" ),
         ( "video/out/wayland/idle-inhibit-v1.c", "wayland" ),