main: Add entry point for CheckNamedFramebufferStatus.

[Fredrik: - Retain the debugging code in CheckFramebufferStatus.
          - Whitespace fixes.]

Reviewed-by: Fredrik Höglund <[email protected]>
Signed-off-by: Fredrik Höglund <[email protected]>

4 files changed, 78 insertions, 15 deletions

diff --git a/src/mapi/glapi/gen/ARB_direct_state_access.xml b/src/mapi/glapi/gen/ARB_direct_state_access.xml
index b8e90aadd45..1748950d120 100644
--- a/src/mapi/glapi/gen/ARB_direct_state_access.xml
+++ b/src/mapi/glapi/gen/ARB_direct_state_access.xml
@@ -181,6 +181,12 @@
       <param name="layer" type="GLint" />
    </function>
 
+   <function name="CheckNamedFramebufferStatus" offset="assign">
+      <return type="GLenum" />
+      <param name="framebuffer" type="GLuint" />
+      <param name="target" type="GLenum" />
+   </function>
+
    <!-- Renderbuffer object functions -->
 
    <function name="CreateRenderbuffers" offset="assign">
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 4da77a33706..ad7a85ccd9b 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2499,24 +2499,12 @@ _mesa_CreateFramebuffers(GLsizei n, GLuint *framebuffers)
 }
 
 
-GLenum GLAPIENTRY
-_mesa_CheckFramebufferStatus(GLenum target)
+GLenum
+_mesa_check_framebuffer_status(struct gl_context *ctx,
+                               struct gl_framebuffer *buffer)
 {
-   struct gl_framebuffer *buffer;
-   GET_CURRENT_CONTEXT(ctx);
-
    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glCheckFramebufferStatus(%s)\n",
-                  _mesa_lookup_enum_by_nr(target));
-
-   buffer = get_framebuffer_target(ctx, target);
-   if (!buffer) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
-      return 0;
-   }
-
    if (_mesa_is_winsys_fbo(buffer)) {
       /* EGL_KHR_surfaceless_context allows the winsys FBO to be incomplete. */
       if (buffer != &IncompleteFramebuffer) {
@@ -2536,6 +2524,67 @@ _mesa_CheckFramebufferStatus(GLenum target)
 }
 
 
+GLenum GLAPIENTRY
+_mesa_CheckFramebufferStatus(GLenum target)
+{
+   struct gl_framebuffer *fb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glCheckFramebufferStatus(%s)\n",
+                  _mesa_lookup_enum_by_nr(target));
+
+   fb = get_framebuffer_target(ctx, target);
+   if (!fb) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glCheckFramebufferStatus(invalid target %s)",
+                  _mesa_lookup_enum_by_nr(target));
+      return 0;
+   }
+
+   return _mesa_check_framebuffer_status(ctx, fb);
+}
+
+
+GLenum GLAPIENTRY
+_mesa_CheckNamedFramebufferStatus(GLuint framebuffer, GLenum target)
+{
+   struct gl_framebuffer *fb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   /* Validate the target (for conformance's sake) and grab a reference to the
+    * default framebuffer in case framebuffer = 0.
+    * Section 9.4 Framebuffer Completeness of the OpenGL 4.5 core spec
+    * (30.10.2014, PDF page 336) says:
+    *    "If framebuffer is zero, then the status of the default read or
+    *    draw framebuffer (as determined by target) is returned."
+    */
+   switch (target) {
+      case GL_DRAW_FRAMEBUFFER:
+      case GL_FRAMEBUFFER:
+         fb = ctx->WinSysDrawBuffer;
+         break;
+      case GL_READ_FRAMEBUFFER:
+         fb = ctx->WinSysReadBuffer;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glCheckNamedFramebufferStatus(invalid target %s)",
+                     _mesa_lookup_enum_by_nr(target));
+         return 0;
+   }
+
+   if (framebuffer) {
+      fb = _mesa_lookup_framebuffer_err(ctx, framebuffer,
+                                        "glCheckNamedFramebufferStatus");
+      if (!fb)
+         return 0;
+   }
+
+   return _mesa_check_framebuffer_status(ctx, fb);
+}
+
+
 /**
  * Replicate the src attachment point. Used by framebuffer_texture() when
  * the same texture is attached at GL_DEPTH_ATTACHMENT and
diff --git a/src/mesa/main/fbobject.h b/src/mesa/main/fbobject.h
index e68762b429e..871a2cc280e 100644
--- a/src/mesa/main/fbobject.h
+++ b/src/mesa/main/fbobject.h
@@ -122,6 +122,10 @@ _mesa_framebuffer_texture(struct gl_context *ctx, struct gl_framebuffer *fb,
                           GLint level, GLuint layer, GLboolean layered,
                           const char *caller);
 
+extern GLenum
+_mesa_check_framebuffer_status(struct gl_context *ctx,
+                               struct gl_framebuffer *fb);
+
 
 extern GLboolean GLAPIENTRY
 _mesa_IsRenderbuffer(GLuint renderbuffer);
@@ -195,6 +199,9 @@ _mesa_CreateFramebuffers(GLsizei n, GLuint *framebuffers);
 extern GLenum GLAPIENTRY
 _mesa_CheckFramebufferStatus(GLenum target);
 
+extern GLenum GLAPIENTRY
+_mesa_CheckNamedFramebufferStatus(GLuint framebuffer, GLenum target);
+
 extern void GLAPIENTRY
 _mesa_FramebufferTexture1D(GLenum target, GLenum attachment,
                               GLenum textarget, GLuint texture, GLint level);
diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
index 0994d437e24..fdfad348a6e 100644
--- a/src/mesa/main/tests/dispatch_sanity.cpp
+++ b/src/mesa/main/tests/dispatch_sanity.cpp
@@ -984,6 +984,7 @@ const struct function gl_core_functions_possible[] = {
    { "glNamedFramebufferRenderbuffer", 45, -1 },
    { "glNamedFramebufferTexture", 45, -1 },
    { "glNamedFramebufferTextureLayer", 45, -1 },
+   { "glCheckNamedFramebufferStatus", 45, -1 },
    { "glCreateRenderbuffers", 45, -1 },
    { "glNamedRenderbufferStorage", 45, -1 },
    { "glNamedRenderbufferStorageMultisample", 45, -1 },