i965: Disallow fast blit paths for CopyTexImage with PixelTransfer ops

glCopyTexImage behaves similarly to glReadPixels with respect to the
pixel transfer operations. Therefore if any are set we cannot use the
simple blit-only fast paths.

(Though if would be possible to relax the blorp path to handle
pixel zoom, or we can just enhance meta.)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jason Ekstrand <jason.ekstrand@intel.com>
Cc: Kenneth Graunke <kenneth@whitecape.org>
Reviwewed-by: Iago Toral <itoral@igalia.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: mesa-stable@lists.freedesktop.org
(cherry picked from commit be519c2d50)

src/mesa/drivers/dri/i965/brw_blorp_blit.cpp

@@ -215,6 +215,10 @@ brw_blorp_copytexsubimage(struct brw_context *brw,
    struct intel_renderbuffer *src_irb = intel_renderbuffer(src_rb);
    struct intel_texture_image *intel_image = intel_texture_image(dst_image);
 
+   /* No pixel transfer operations (zoom, bias, mapping), just a blit */
+   if (brw->ctx._ImageTransferState)
+      return false;
+
    /* Sync up the state of window system buffers.  We need to do this before
     * we go looking at the src renderbuffer's miptree.
     */

src/mesa/drivers/dri/i965/intel_tex_copy.c

@@ -55,6 +55,10 @@ intel_copy_texsubimage(struct brw_context *brw,
    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
    bool ret;
 
+   /* No pixel transfer operations (zoom, bias, mapping), just a blit */
+   if (brw->ctx._ImageTransferState)
+      return false;
+
    intel_prepare_render(brw);
 
    /* glCopyTexSubImage() can be called on a multisampled renderbuffer (if