Move NumberOfPlanesForGpuMemoryBufferFormat to gfx

components/view_manager/gles2/mojo_gpu_memory_buffer.cc

 // Copyright 2015 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 "components/view_manager/gles2/mojo_gpu_memory_buffer.h"
 
 #include "base/logging.h"
 #include "base/memory/shared_memory.h"
 #include "base/numerics/safe_conversions.h"
 
 namespace gles2 {
 
 namespace {
 
-int NumberOfPlanesForGpuMemoryBufferFormat(gfx::BufferFormat format) {
-  switch (format) {
-    case gfx::BufferFormat::ATC:
-    case gfx::BufferFormat::ATCIA:
-    case gfx::BufferFormat::DXT1:
-    case gfx::BufferFormat::DXT5:
-    case gfx::BufferFormat::ETC1:
-    case gfx::BufferFormat::R_8:
-    case gfx::BufferFormat::RGBA_4444:
-    case gfx::BufferFormat::RGBA_8888:
-    case gfx::BufferFormat::RGBX_8888:
-    case gfx::BufferFormat::BGRA_8888:
-      return 1;
-    case gfx::BufferFormat::YUV_420:
-      return 3;
-  }
-  NOTREACHED();
-  return 0;
-}
-
 size_t SubsamplingFactor(gfx::BufferFormat format, int plane) {
   switch (format) {
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::R_8:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
@@ skipping 34 matching lines @@
       return width * 4;
     case gfx::BufferFormat::YUV_420:
       return width / SubsamplingFactor(format, plane);
   }
   NOTREACHED();
   return 0;
 }
 
 size_t BufferSizeInBytes(const gfx::Size& size, gfx::BufferFormat format) {
   size_t size_in_bytes = 0;
-  int num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format);
+  int num_planes = gfx::GpuMemoryBuffer::NumberOfPlanes(format);
   for (int i = 0; i < num_planes; ++i) {
     size_in_bytes += StrideInBytes(size.width(), format, i) *
                      (size.height() / SubsamplingFactor(format, i));
   }
   return size_in_bytes;
 }
 
 }  // namespace
 
 MojoGpuMemoryBufferImpl::MojoGpuMemoryBufferImpl(
@@ skipping 24 matching lines @@
     ClientBuffer buffer) {
   return reinterpret_cast<MojoGpuMemoryBufferImpl*>(buffer);
 }
 
 bool MojoGpuMemoryBufferImpl::Map(void** data) {
   DCHECK(!mapped_);
   if (!shared_memory_->Map(BufferSizeInBytes(size_, format_)))
     return false;
   mapped_ = true;
   size_t offset = 0;
-  int num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format_);
+  int num_planes = gfx::GpuMemoryBuffer::NumberOfPlanes(format_);
   for (int i = 0; i < num_planes; ++i) {
     data[i] = reinterpret_cast<uint8*>(shared_memory_->memory()) + offset;
     offset += StrideInBytes(size_.width(), format_, i) *
               (size_.height() / SubsamplingFactor(format_, i));
   }
   return true;
 }
 
 void MojoGpuMemoryBufferImpl::Unmap() {
   DCHECK(mapped_);
   shared_memory_->Unmap();
   mapped_ = false;
 }
 
 bool MojoGpuMemoryBufferImpl::IsMapped() const {
   return mapped_;
 }
 
 gfx::BufferFormat MojoGpuMemoryBufferImpl::GetFormat() const {
   return format_;
 }
 
 void MojoGpuMemoryBufferImpl::GetStride(int* stride) const {
-  int num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format_);
+  int num_planes = gfx::GpuMemoryBuffer::NumberOfPlanes(format_);
   for (int i = 0; i < num_planes; ++i)
     stride[i] =
         base::checked_cast<int>(StrideInBytes(size_.width(), format_, i));
 }
 
 gfx::GpuMemoryBufferId MojoGpuMemoryBufferImpl::GetId() const {
   return 0;
 }
 
 gfx::GpuMemoryBufferHandle MojoGpuMemoryBufferImpl::GetHandle() const {
   gfx::GpuMemoryBufferHandle handle;
   handle.type = gfx::SHARED_MEMORY_BUFFER;
   handle.handle = shared_memory_->handle();
   return handle;
 }
 
 ClientBuffer MojoGpuMemoryBufferImpl::AsClientBuffer() {
   return reinterpret_cast<ClientBuffer>(this);
 }
 
 }  // namespace gles2