[Mesa-stable] [PATCH 10/15] mesa: Don't allow snorm internal formats in glCopyTexImage*() in GLES3

[Anuj Phogat]

Fixes few failures in gles3 Khronos CTS test: packed_pixels

Cc: "10.2" <mesa-stable at lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
---
 src/mesa/main/teximage.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 03ebbd8..6474dba 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -2667,6 +2667,17 @@ copytexture_error_check( struct gl_context *ctx, GLuint dimensions,
                      "glCopyTexImage%dD(srgb usage mismatch)", dimensions);
          return GL_TRUE;
       }
+
+      /* Page 139, Table 3.15 of OpenGL ES 3.0 spec does not define ReadPixels
+       * types for SNORM formats. Also, conversion to SNORM formats is not
+       * allowed by Table 3.2 on Page 110.
+       */
+      if(_mesa_is_enum_format_snorm(internalFormat)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glCopyTexImage%dD(internalFormat=%s)", dimensions,
+                     _mesa_lookup_enum_by_nr(internalFormat));
+         return GL_TRUE;
+      }
    }
 
    if (!_mesa_source_buffer_exists(ctx, baseFormat)) {
-- 
1.8.3.1