+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_enum_to_string(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
+ * GL_STENCIL_ATTACHMENT.
+ */
+static void
+reuse_framebuffer_texture_attachment(struct gl_framebuffer *fb,
+ gl_buffer_index dst,
+ gl_buffer_index src)
+{
+ struct gl_renderbuffer_attachment *dst_att = &fb->Attachment[dst];
+ struct gl_renderbuffer_attachment *src_att = &fb->Attachment[src];
+
+ assert(src_att->Texture != NULL);
+ assert(src_att->Renderbuffer != NULL);
+
+ _mesa_reference_texobj(&dst_att->Texture, src_att->Texture);
+ _mesa_reference_renderbuffer(&dst_att->Renderbuffer, src_att->Renderbuffer);
+ dst_att->Type = src_att->Type;
+ dst_att->Complete = src_att->Complete;
+ dst_att->TextureLevel = src_att->TextureLevel;
+ dst_att->Zoffset = src_att->Zoffset;
+ dst_att->Layered = src_att->Layered;
+}
+
+
+/**
+ * Common code called by gl*FramebufferTexture*() to retrieve the correct
+ * texture object pointer.
+ *
+ * \param texObj where the pointer to the texture object is returned. Note
+ * that a successful call may return texObj = NULL.
+ *
+ * \return true if no errors, false if errors
+ */
+static bool
+get_texture_for_framebuffer(struct gl_context *ctx, GLuint texture,
+ bool layered, const char *caller,
+ struct gl_texture_object **texObj)
+{
+ *texObj = NULL; /* This will get returned if texture = 0. */
+
+ if (!texture)
+ return true;
+
+ *texObj = _mesa_lookup_texture(ctx, texture);
+ if (*texObj == NULL || (*texObj)->Target == 0) {
+ /* Can't render to a non-existent texture object.
+ *
+ * The OpenGL 4.5 core spec (02.02.2015) in Section 9.2 Binding and
+ * Managing Framebuffer Objects specifies a different error
+ * depending upon the calling function (PDF pages 325-328).
+ * *FramebufferTexture (where layered = GL_TRUE) throws invalid
+ * value, while the other commands throw invalid operation (where
+ * layered = GL_FALSE).
+ */
+ const GLenum error = layered ? GL_INVALID_VALUE :
+ GL_INVALID_OPERATION;
+ _mesa_error(ctx, error,
+ "%s(non-existent texture %u)", caller, texture);
+ return false;
+ }
+
+ return true;
+}
+
+
+/**
+ * Common code called by gl*FramebufferTexture() to verify the texture target
+ * and decide whether or not the attachment should truly be considered
+ * layered.
+ *
+ * \param layered true if attachment should be considered layered, false if
+ * not
+ *
+ * \return true if no errors, false if errors
+ */
+static bool
+check_layered_texture_target(struct gl_context *ctx, GLenum target,
+ const char *caller, GLboolean *layered)
+{
+ *layered = GL_TRUE;
+
+ switch (target) {
+ case GL_TEXTURE_3D:
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ case GL_TEXTURE_CUBE_MAP:
+ case GL_TEXTURE_CUBE_MAP_ARRAY:
+ case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
+ return true;
+ case GL_TEXTURE_1D:
+ case GL_TEXTURE_2D:
+ case GL_TEXTURE_RECTANGLE:
+ case GL_TEXTURE_2D_MULTISAMPLE:
+ /* These texture types are valid to pass to
+ * glFramebufferTexture(), but since they aren't layered, it
+ * is equivalent to calling glFramebufferTexture{1D,2D}().
+ */
+ *layered = GL_FALSE;
+ return true;
+ }
+
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(invalid texture target %s)", caller,
+ _mesa_enum_to_string(target));
+ return false;
+}
+
+
+/**
+ * Common code called by gl*FramebufferTextureLayer() to verify the texture
+ * target.
+ *
+ * \return true if no errors, false if errors
+ */
+static bool
+check_texture_target(struct gl_context *ctx, GLenum target,
+ const char *caller)
+{
+ /* We're being called by glFramebufferTextureLayer().
+ * The only legal texture types for that function are 3D,
+ * cube-map, and 1D/2D/cube-map array textures.
+ *
+ * We don't need to check for GL_ARB_texture_cube_map_array because the
+ * application wouldn't have been able to create a texture with a
+ * GL_TEXTURE_CUBE_MAP_ARRAY target if the extension were not enabled.
+ */
+ switch (target) {
+ case GL_TEXTURE_3D:
+ case GL_TEXTURE_1D_ARRAY:
+ case GL_TEXTURE_2D_ARRAY:
+ case GL_TEXTURE_CUBE_MAP_ARRAY:
+ case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
+ return true;
+ case GL_TEXTURE_CUBE_MAP:
+ /* We don't need to check the extension (GL_ARB_direct_state_access) or
+ * GL version (4.5) for GL_TEXTURE_CUBE_MAP because DSA is always
+ * enabled in core profile. This can be called from
+ * _mesa_FramebufferTextureLayer in compatibility profile (OpenGL 3.0),
+ * so we do have to check the profile.
+ */
+ return ctx->API == API_OPENGL_CORE;
+ }
+
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(invalid texture target %s)", caller,
+ _mesa_enum_to_string(target));
+ return false;
+}
+
+
+/**
+ * Common code called by glFramebufferTexture*D() to verify the texture
+ * target.
+ *
+ * \return true if no errors, false if errors
+ */
+static bool
+check_textarget(struct gl_context *ctx, int dims, GLenum target,
+ GLenum textarget, const char *caller)
+{
+ bool err = false;
+
+ switch (dims) {
+ case 1:
+ switch (textarget) {
+ case GL_TEXTURE_1D:
+ break;
+ case GL_TEXTURE_1D_ARRAY:
+ err = !ctx->Extensions.EXT_texture_array;
+ break;
+ default:
+ err = true;