[Mesa-dev] [RFC PATCH 07/65] mesa: refuse to change textures when a handle is allocated

[Samuel Pitoiset]

The ARB_bindless_texture spec says:

   "The error INVALID_OPERATION is generated by TexImage*, CopyTexImage*,
    CompressedTexImage*, TexBuffer*, TexParameter*, as well as other
    functions defined in terms of these, if the texture object to be
    modified is referenced by one or more texture or image handles."

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/mesa/main/teximage.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index fed1dad262..ac06b66985 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -1578,7 +1578,7 @@ legal_texsubimage_target(struct gl_context *ctx, GLuint dims, GLenum target,
 
 /**
  * Helper function to determine if a texture object is mutable (in terms
- * of GL_ARB_texture_storage).
+ * of GL_ARB_texture_storage/GL_ARB_bindless_texture).
  */
 static GLboolean
 mutable_tex_object(struct gl_context *ctx, GLenum target)
@@ -1587,6 +1587,17 @@ mutable_tex_object(struct gl_context *ctx, GLenum target)
    if (!texObj)
       return GL_FALSE;
 
+   if (texObj->HandleAllocated) {
+      /* The ARB_bindless_texture spec says:
+       *
+       * "The error INVALID_OPERATION is generated by TexImage*, CopyTexImage*,
+       *  CompressedTexImage*, TexBuffer*, TexParameter*, as well as other
+       *  functions defined in terms of these, if the texture object to be
+       *  modified is referenced by one or more texture or image handles."
+       */
+      return GL_FALSE;
+   }
+
    return !texObj->Immutable;
 }
 
@@ -5009,6 +5020,18 @@ texture_buffer_range(struct gl_context *ctx,
       return;
    }
 
+   if (texObj->HandleAllocated) {
+      /* The ARB_bindless_texture spec says:
+       *
+       * "The error INVALID_OPERATION is generated by TexImage*, CopyTexImage*,
+       *  CompressedTexImage*, TexBuffer*, TexParameter*, as well as other
+       *  functions defined in terms of these, if the texture object to be
+       *  modified is referenced by one or more texture or image handles."
+       */
+      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(immutable texture)", caller);
+      return;
+   }
+
    format = _mesa_validate_texbuffer_format(ctx, internalFormat);
    if (format == MESA_FORMAT_NONE) {
       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat %s)",
-- 
2.13.0