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, 9 deletions

diff --git a/video/out/opengl/context_cocoa.c b/video/out/opengl/context_cocoa.c
index 271bdb7444..ea7a9b535f 100644
--- a/video/out/opengl/context_cocoa.c
+++ b/video/out/opengl/context_cocoa.c
@@ -33,14 +33,6 @@ static int set_swap_interval(int enabled)
     return (err == kCGLNoError) ? 0 : -1;
 }
 
-static int cgl_color_size(struct MPGLContext *ctx)
-{
-    struct cgl_context *p = ctx->priv;
-    GLint value;
-    CGLDescribePixelFormat(p->pix, 0, kCGLPFAColorSize, &value);
-    return value > 16 ? 8 : 5;
-}
-
 static void *cocoa_glgetaddr(const char *s)
 {
     void *ret = NULL;
@@ -123,7 +115,6 @@ static bool create_gl_context(struct MPGLContext *ctx, int vo_flags)
         CGLSetParameter(p->ctx, kCGLCPSurfaceOpacity, &(GLint){0});
 
     mpgl_load_functions(ctx->gl, (void *)cocoa_glgetaddr, NULL, ctx->vo->log);
-    ctx->gl->fb_r = ctx->gl->fb_g = ctx->gl->fb_b = cgl_color_size(ctx);
 
     CGLReleasePixelFormat(p->pix);