[Mesa-stable] [PATCH 1/2] mesa: Fix texture target validation for glFramebufferTexture()

[Paul Berry]

Previously we were using the code path for validating
glFramebufferTextureLayer().  But glFramebufferTexture() allows
additional texture types.

Fixes piglit tests:
- spec/!OpenGL 3.2/layered-rendering/gl-layer-cube-map
- spec/!OpenGL 3.2/layered-rendering/framebuffertexture

Cc: "10.0" <mesa-stable at lists.freedesktop.org>
---
 src/mesa/main/fbobject.c | 50 ++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 10 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 9dd7161..2feb4c3 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2334,16 +2334,46 @@ framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
       texObj = _mesa_lookup_texture(ctx, texture);
       if (texObj != NULL) {
          if (textarget == 0) {
-            /* If textarget == 0 it means we're being called by
-             * glFramebufferTextureLayer() and textarget is not used.
-             * The only legal texture types for that function are 3D and
-             * 1D/2D arrays textures.
-             */
-            err = (texObj->Target != GL_TEXTURE_3D) &&
-                (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
-                (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT) &&
-                (texObj->Target != GL_TEXTURE_CUBE_MAP_ARRAY) &&
-                (texObj->Target != GL_TEXTURE_2D_MULTISAMPLE_ARRAY);
+            if (layered) {
+               /* We're being called by glFramebufferTexture() and textarget
+                * is not used.
+                */
+               switch (texObj->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:
+                  err = false;
+                  break;
+               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}().
+                   */
+                  err = false;
+                  layered = false;
+                  textarget = texObj->Target;
+                  break;
+               default:
+                  err = true;
+                  break;
+               }
+            } else {
+               /* We're being called by glFramebufferTextureLayer() and
+                * textarget is not used.  The only legal texture types for
+                * that function are 3D and 1D/2D arrays textures.
+                */
+               err = (texObj->Target != GL_TEXTURE_3D) &&
+                  (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
+                  (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT) &&
+                  (texObj->Target != GL_TEXTURE_CUBE_MAP_ARRAY) &&
+                  (texObj->Target != GL_TEXTURE_2D_MULTISAMPLE_ARRAY);
+            }
          }
          else {
             /* Make sure textarget is consistent with the texture's type */
-- 
1.8.4.2