Revert "getteximage: Return correct error value when texure object is not found"

From OpenGL 4.5 spec PDF, section '8.11. Texture Queries', page 236:
  "An INVALID_VALUE error is generated if texture is not the name of
   an existing texture object."

Same wording applies to the compressed version.

But turns out this is a spec bug, and Khronos is fixing it for the next
revisions.

The proposal is to return INVALID_OPERATION in these cases.

This reverts commit 633c959faeae5099fd095f27da7b954e4a36254b.

v2:
- Use _mesa_lookup_texture_err (Samuel Pitoiset)

v3:
- _mesa_lookup_texture_err() already handles texture > 0 (Samuel
Pitoiset)
- Just revert 633c959fae (Juan A. Suarez)

Reviewed-by: Samuel Pitoiset <[email protected]>
Signed-off-by: Juan A. Suarez Romero <[email protected]>

1 files changed, 3 insertions, 9 deletions

diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c
index 658b0e58e6d..715bc249be1 100644
--- a/src/mesa/main/texgetimage.c
+++ b/src/mesa/main/texgetimage.c
@@ -1458,13 +1458,10 @@ _mesa_GetTextureSubImage(GLuint texture, GLint level,
 {
    GET_CURRENT_CONTEXT(ctx);
    static const char *caller = "glGetTextureSubImage";
-   struct gl_texture_object *texObj = NULL;
-
-   if (texture > 0)
-      texObj = _mesa_lookup_texture(ctx, texture);
+   struct gl_texture_object *texObj =
+      _mesa_lookup_texture_err(ctx, texture, caller);
 
    if (!texObj) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(texture)", caller);
       return;
    }
 
@@ -1778,11 +1775,8 @@ _mesa_GetCompressedTextureSubImage(GLuint texture, GLint level,
    static const char *caller = "glGetCompressedTextureImage";
    struct gl_texture_object *texObj = NULL;
 
-   if (texture > 0)
-      texObj = _mesa_lookup_texture(ctx, texture);
-
+   texObj = _mesa_lookup_texture_err(ctx, texture, caller);
    if (!texObj) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(texture)", caller);
       return;
    }