gpu: Move buffer format to target texture map into gpu host.

gpu/ipc/host/gpu_memory_buffer_support.cc

 // Copyright 2016 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/ipc/host/gpu_memory_buffer_support.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "gpu/ipc/common/gpu_memory_buffer_support.h"
 #include "gpu/ipc/host/gpu_switches.h"
+#include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_switches.h"
 
 namespace gpu {
 
 bool AreNativeGpuMemoryBuffersEnabled() {
   // Disable native buffers when using Mesa.
   if (base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kUseGL) == gl::kGLImplementationOSMesaName) {
     return false;
   }
@@ skipping 53 matching lines @@
       for (auto& usage : kGPUReadWriteUsages) {
         if (IsNativeGpuMemoryBufferConfigurationSupported(format, usage))
           configurations.insert(std::make_pair(format, usage));
       }
     }
   }
 
   return configurations;
 }
 
+uint32_t GetImageTextureTarget(gfx::BufferFormat format,
+                               gfx::BufferUsage usage) {
+  GpuMemoryBufferConfigurationSet native_configurations =
+      GetNativeGpuMemoryBufferConfigurations();
+  if (native_configurations.find(std::make_pair(format, usage)) ==
+      native_configurations.end()) {
+    return GL_TEXTURE_2D;
+  }
+
+  switch (GetNativeGpuMemoryBufferType()) {
+    case gfx::OZONE_NATIVE_PIXMAP:
+      // GPU memory buffers that are shared with the GL using EGLImages
+      // require TEXTURE_EXTERNAL_OES.
+      return GL_TEXTURE_EXTERNAL_OES;
+    case gfx::IO_SURFACE_BUFFER:
+      // IOSurface backed images require GL_TEXTURE_RECTANGLE_ARB.
+      return GL_TEXTURE_RECTANGLE_ARB;
+    case gfx::SHARED_MEMORY_BUFFER:
+      return GL_TEXTURE_2D;
+    case gfx::EMPTY_BUFFER:
+      NOTREACHED();
+      return GL_TEXTURE_2D;
+  }
+
+  NOTREACHED();
+  return GL_TEXTURE_2D;
+}
+
 }  // namespace gpu