egl: implement EXT_surface_SMPTE2086_metadata and EXT_surface_CTA861_3_metadata

[mesa.git] / src / egl / main / eglcontext.c

diff --git a/src/egl/main/eglcontext.c b/src/egl/main/eglcontext.c
index 3e5d8ad97bfc131197c39b169e07c24e143124c3..ecc546e113222d89928ccb7c9526a1a9397ff91d 100644 (file)
--- a/src/egl/main/eglcontext.c
+++ b/src/egl/main/eglcontext.c
@@ -588,7 +588,6 @@ _eglInitContext(_EGLContext *ctx, _EGLDisplay *dpy, _EGLConfig *conf,
    _eglInitResource(&ctx->Resource, sizeof(*ctx), dpy);
    ctx->ClientAPI = api;
    ctx->Config = conf;
-   ctx->WindowRenderBuffer = EGL_NONE;
    ctx->Profile = EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
 
    ctx->ClientMajorVersion = 1; /* the default, per EGL spec */
@@ -620,15 +619,42 @@ static EGLint
 _eglQueryContextRenderBuffer(_EGLContext *ctx)
 {
    _EGLSurface *surf = ctx->DrawSurface;
-   EGLint rb;
 
+   /* From the EGL 1.5 spec:
+    *
+    *    - If the context is not bound to a surface, then EGL_NONE will be
+    *      returned.
+    */
    if (!surf)
       return EGL_NONE;
-   if (surf->Type == EGL_WINDOW_BIT && ctx->WindowRenderBuffer != EGL_NONE)
-      rb = ctx->WindowRenderBuffer;
-   else
-      rb = surf->RenderBuffer;
-   return rb;
+
+   switch (surf->Type) {
+   default:
+      unreachable("bad EGLSurface type");
+   case EGL_PIXMAP_BIT:
+      /* - If the context is bound to a pixmap surface, then EGL_SINGLE_BUFFER
+       *   will be returned.
+       */
+      return EGL_SINGLE_BUFFER;
+   case EGL_PBUFFER_BIT:
+      /* - If the context is bound to a pbuffer surface, then EGL_BACK_BUFFER
+       *   will be returned.
+       */
+      return EGL_BACK_BUFFER;
+   case EGL_WINDOW_BIT:
+      /* - If the context is bound to a window surface, then either
+       *   EGL_BACK_BUFFER or EGL_SINGLE_BUFFER may be returned. The value
+       *   returned depends on both the buffer requested by the setting of the
+       *   EGL_RENDER_BUFFER property of the surface [...], and on the client
+       *   API (not all client APIs support single-buffer Rendering to window
+       *   surfaces). Some client APIs allow control of whether rendering goes
+       *   to the front or back buffer. This client API-specific choice is not
+       *   reflected in the returned value, which only describes the buffer
+       *   that will be rendered to by default if not overridden by the client
+       *   API.
+       */
+      return surf->ActiveRenderBuffer;
+   }
 }