Add half-float IOSurface GpuMemoryBuffer support

gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc

 // Copyright 2014 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 <GLES2/gl2.h>
 #include <GLES2/gl2chromium.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/process/process_handle.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "gpu/command_buffer/service/image_manager.h"
 #include "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/gpu_memory_buffer.h"
+#include "ui/gfx/half_float.h"
 #include "ui/gl/gl_image.h"
 
 using testing::_;
 using testing::IgnoreResult;
 using testing::InvokeWithoutArgs;
 using testing::Invoke;
 using testing::Return;
 using testing::SetArgPointee;
 using testing::StrictMock;
 
@@ skipping 75 matching lines @@
       }
       return;
     case gfx::BufferFormat::BGRA_8888:
       for (int i = 0; i < width * 4; i += 4) {
         buffer[i + 0] = pixel[2];
         buffer[i + 1] = pixel[1];
         buffer[i + 2] = pixel[0];
         buffer[i + 3] = pixel[3];
       }
       return;
+    case gfx::BufferFormat::RGBA_F16: {
+      float float_pixel[4] = {
+          pixel[0] / 255.f, pixel[1] / 255.f, pixel[2] / 255.f,
+          pixel[3] / 255.f,
+      };
+      uint16_t half_float_pixel[4];
+      gfx::FloatToHalfFloat(float_pixel, half_float_pixel, 4);
+      uint16_t* half_float_buffer = reinterpret_cast<uint16_t*>(buffer);
+      for (int i = 0; i < width * 4; i += 4) {
+        half_float_buffer[i + 0] = half_float_pixel[0];
+        half_float_buffer[i + 1] = half_float_pixel[1];
+        half_float_buffer[i + 2] = half_float_pixel[2];
+        half_float_buffer[i + 3] = half_float_pixel[3];
+      }
+      return;
+    }
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RG_88:
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::UYVY_422:
     case gfx::BufferFormat::YVU_420:
@@ skipping 11 matching lines @@
       return GL_RED;
     case gfx::BufferFormat::RG_88:
       return GL_RG;
     case gfx::BufferFormat::BGR_565:
       return GL_RGB;
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
       return GL_RGBA;
     case gfx::BufferFormat::BGRA_8888:
       return GL_BGRA_EXT;
+    case gfx::BufferFormat::RGBA_F16:
+      return GL_RGBA;
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::UYVY_422:
     case gfx::BufferFormat::YVU_420:
     case gfx::BufferFormat::YUV_420_BIPLANAR:
@@ skipping 88 matching lines @@
   glDestroyImageCHROMIUM(image_id);
   glDeleteTextures(1, &texture_id);
 }
 
 INSTANTIATE_TEST_CASE_P(GpuMemoryBufferTests,
                         GpuMemoryBufferTest,
                         ::testing::Values(gfx::BufferFormat::R_8,
                                           gfx::BufferFormat::BGR_565,
                                           gfx::BufferFormat::RGBA_4444,
                                           gfx::BufferFormat::RGBA_8888,
-                                          gfx::BufferFormat::BGRA_8888));
+                                          gfx::BufferFormat::BGRA_8888,
+                                          gfx::BufferFormat::RGBA_F16));
 
 }  // namespace gles2
 }  // namespace gpu