Mesa (master): mesa: Don't allow snorm internal formats in glCopyTexImage* () in GLES3

[Anuj Phogat]

Module: Mesa
Branch: master
Commit: 2d362a6aee0a1acab08590f2ba0ce50743546209
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2d362a6aee0a1acab08590f2ba0ce50743546209

Author: Anuj Phogat <anuj.phogat at gmail.com>
Date:   Fri Jun  6 14:53:12 2014 -0700

mesa: Don't allow snorm internal formats in glCopyTexImage*() in GLES3

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>
Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.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 21ba4b6..48a9128 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -2711,6 +2711,17 @@ 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)) {