[Mesa-dev] [PATCH] mesa: In core profile, refuse to draw unless a VAO is bound.

[Kenneth Graunke]

Core profile requires a non-default VAO to be bound.  Currently, calls
to glVertexAttribPointer raise INVALID_OPERATION unless a VAO is bound,
and we never actually get any vertex data set.  Trying to draw without
any vertex data can only cause problems.  In i965, it causes a crash.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76400
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/main/api_validate.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c
index f3fd1a4..923a195 100644
--- a/src/mesa/main/api_validate.c
+++ b/src/mesa/main/api_validate.c
@@ -125,8 +125,11 @@ check_valid_to_render(struct gl_context *ctx, const char *function)
 	 return GL_FALSE;
       break;
 
-   case API_OPENGL_COMPAT:
    case API_OPENGL_CORE:
+      if (ctx->Array.VAO == ctx->Array.DefaultVAO)
+         return GL_FALSE;
+      /* fallthrough */
+   case API_OPENGL_COMPAT:
       {
          const struct gl_shader_program *vsProg =
             ctx->Shader.CurrentProgram[MESA_SHADER_VERTEX];
-- 
1.9.0