Implement helper functionalities for computing image size with ES3 settings.

gpu/command_buffer/service/context_state.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/context_state.h"
 
 #include <cmath>
 
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/buffer_manager.h"
@@ skipping 576 matching lines @@
 
 void ContextState::UnbindSampler(Sampler* sampler) {
   for (size_t jj = 0; jj < sampler_units.size(); ++jj) {
     if (sampler_units[jj].get() == sampler) {
       sampler_units[jj] = nullptr;
       glBindSampler(jj, 0);
     }
   }
 }
 
+PixelStoreParams ContextState::GetPackParams() {
+  PixelStoreParams params;
+  params.alignment = pack_alignment;
+  params.row_length = pack_row_length;
+  params.skip_pixels = pack_skip_pixels;
+  params.skip_rows = pack_skip_rows;
+  return params;
+}
+
+PixelStoreParams ContextState::GetUnpackParams(Dimension dimension) {
+  PixelStoreParams params;
+  params.alignment = unpack_alignment;
+  params.row_length = unpack_row_length;
+  params.skip_pixels = unpack_skip_pixels;
+  params.skip_rows = unpack_skip_rows;
+  if (dimension == k3D) {
+    params.image_height = unpack_image_height;
+    params.skip_images = unpack_skip_images;
+  }
+  return params;
+}
+
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/context_state_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu