gpu: support R16 GPUMemoryBuffer

ui/gl/gl_image_io_surface.mm

 // Copyright 2013 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 "ui/gl/gl_image_io_surface.h"
 
 #include <map>
 
 #include "base/callback_helpers.h"
 #include "base/mac/bind_objc_block.h"
@@ skipping 14 matching lines @@
 #include <stddef.h>
 
 using gfx::BufferFormat;
 
 namespace gl {
 namespace {
 
 bool ValidInternalFormat(unsigned internalformat) {
   switch (internalformat) {
     case GL_RED:
+    case GL_R16_EXT:
     case GL_RG:
     case GL_BGRA_EXT:
     case GL_RGB:
     case GL_RGB_YCBCR_420V_CHROMIUM:
     case GL_RGB_YCBCR_422_CHROMIUM:
     case GL_RGBA:
       return true;
     default:
       return false;
   }
 }
 
 bool ValidFormat(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::RGBA_F16:
     case gfx::BufferFormat::UYVY_422:
     case gfx::BufferFormat::YUV_420_BIPLANAR:
       return true;
+    case gfx::BufferFormat::R_16:
     case gfx::BufferFormat::RG_88:
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::BGR_565:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::YVU_420:
       return false;
   }
 
   NOTREACHED();
   return false;
 }
 
 GLenum TextureFormat(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
       return GL_RED;
+    case gfx::BufferFormat::R_16:
+      return GL_R16_EXT;
     case gfx::BufferFormat::RG_88:
       return GL_RG;
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::RGBA_F16:
       return GL_RGBA;
     case gfx::BufferFormat::UYVY_422:
       return GL_RGB;
     case gfx::BufferFormat::YUV_420_BIPLANAR:
@@ skipping 12 matching lines @@
   }
 
   NOTREACHED();
   return 0;
 }
 
 GLenum DataFormat(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
       return GL_RED;
+    case gfx::BufferFormat::R_16:
+      return GL_R16_EXT;
     case gfx::BufferFormat::RG_88:
       return GL_RG;
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::RGBA_8888:
       return GL_BGRA;
     case gfx::BufferFormat::RGBA_F16:
       return GL_RGBA;
     case gfx::BufferFormat::UYVY_422:
       return GL_YCBCR_422_APPLE;
@@ skipping 11 matching lines @@
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
 GLenum DataType(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::R_16:

[aleksandar.stojiljkovic, 2017/06/08 14:27:56]

should return GL_UNSIGNED_SHORT

[riju_, 2017/06/09 08:20:10]

Done.

     case gfx::BufferFormat::RG_88:
       return GL_UNSIGNED_BYTE;
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::RGBA_8888:
       return GL_UNSIGNED_INT_8_8_8_8_REV;
     case gfx::BufferFormat::RGBA_F16:
       return GL_HALF_APPLE;
     case gfx::BufferFormat::UYVY_422:
       return GL_UNSIGNED_SHORT_8_8_APPLE;
@@ skipping 266 matching lines @@
 }
 
 // static
 GLImageIOSurface* GLImageIOSurface::FromGLImage(GLImage* image) {
   if (!image || image->GetType() != Type::IOSURFACE)
     return nullptr;
   return static_cast<GLImageIOSurface*>(image);
 }
 
 }  // namespace gl