vo_opengl: use standard functions to retrieve display depth

Until now, we've used system-specific API (GLX, EGL, etc.) to retrieve
the depth of the default framebuffer. (We equal this to display depth
and use the determined depth for dithering.)

We can actually retrieve this value through standard GL API, and it
works everywhere (except GLES 2 of course). This simplifies everything a
great deal.

egl_helpers.c is empty now. But I expect that some EGL boilerplate will
be moved to it, so don't remove it yet.

1 files changed, 0 insertions, 19 deletions

diff --git a/video/out/opengl/context_dxinterop.c b/video/out/opengl/context_dxinterop.c
index a4dc165132..4f75d22186 100644
--- a/video/out/opengl/context_dxinterop.c
+++ b/video/out/opengl/context_dxinterop.c
@@ -278,25 +278,6 @@ static int d3d_size_dependent_create(MPGLContext *ctx)
     MP_VERBOSE(ctx->vo, "DX_interop backbuffer format: %u\n",
         (unsigned)bb_desc.Format);
 
-    // Note: This backend has only been tested on an 8-bit display. It's
-    // unknown whether this code is enough to support other formats or if more
-    // work is needed.
-    switch (bb_desc.Format) {
-    case D3DFMT_X1R5G5B5: case D3DFMT_A1R5G5B5:
-        ctx->gl->fb_r = ctx->gl->fb_g = ctx->gl->fb_b = 5;
-        break;
-    case D3DFMT_R5G6B5:
-        ctx->gl->fb_r = 5; ctx->gl->fb_g = 6; ctx->gl->fb_b = 5;
-        break;
-    case D3DFMT_R8G8B8: case D3DFMT_A8R8G8B8: case D3DFMT_X8R8G8B8:
-    case D3DFMT_A8B8G8R8: case D3DFMT_X8B8G8R8: default:
-        ctx->gl->fb_r = ctx->gl->fb_g = ctx->gl->fb_b = 8;
-        break;
-    case D3DFMT_A2R10G10B10: case D3DFMT_A2B10G10R10:
-        ctx->gl->fb_r = ctx->gl->fb_g = ctx->gl->fb_b = 10;
-        break;
-    }
-
     // Create a rendertarget with the same format as the backbuffer for
     // rendering from OpenGL
     HANDLE share_handle = NULL;