gpu: support R16 GPUMemoryBuffer

ui/gl/gl_image_memory.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 "ui/gl/gl_image_memory.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
@@ skipping 27 matching lines @@
 }
 
 bool ValidFormat(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::R_16:
     case gfx::BufferFormat::RG_88:
     case gfx::BufferFormat::BGR_565:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::RGBA_F16:
       return true;
     case gfx::BufferFormat::YVU_420:
     case gfx::BufferFormat::YUV_420_BIPLANAR:
     case gfx::BufferFormat::UYVY_422:
       return false;
   }
 
   NOTREACHED();
   return false;
 }
 
 bool IsCompressedFormat(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:
       return true;
     case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::R_16:
     case gfx::BufferFormat::RG_88:
     case gfx::BufferFormat::BGR_565:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::RGBA_F16:
       return false;
     case gfx::BufferFormat::YVU_420:
@@ skipping 14 matching lines @@
     case gfx::BufferFormat::ATCIA:
       return GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD;
     case gfx::BufferFormat::DXT1:
       return GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
     case gfx::BufferFormat::DXT5:
       return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
     case gfx::BufferFormat::ETC1:
       return GL_ETC1_RGB8_OES;
     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::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::RGBA_F16:
       return GL_RGBA;
     case gfx::BufferFormat::BGRA_8888:
       return GL_BGRA_EXT;
     case gfx::BufferFormat::BGR_565:
     case gfx::BufferFormat::RGBX_8888:
@@ skipping 15 matching lines @@
     case gfx::BufferFormat::RGBX_8888:
       return GL_RGBA;
     case gfx::BufferFormat::BGRX_8888:
       return GL_BGRA_EXT;
     case gfx::BufferFormat::BGR_565:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::RGBA_F16:
     case gfx::BufferFormat::R_8:
+    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:
       return TextureFormat(format);
     case gfx::BufferFormat::YVU_420:
     case gfx::BufferFormat::YUV_420_BIPLANAR:
     case gfx::BufferFormat::UYVY_422:
@@ skipping 11 matching lines @@
       return GL_UNSIGNED_SHORT_5_6_5_REV;
     case gfx::BufferFormat::RGBA_4444:
       return GL_UNSIGNED_SHORT_4_4_4_4;
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::R_8:
     case gfx::BufferFormat::RG_88:
       return GL_UNSIGNED_BYTE;
+    case gfx::BufferFormat::R_16:
+      return GL_UNSIGNED_SHORT;
     case gfx::BufferFormat::RGBA_F16:
       return GL_HALF_FLOAT_OES;
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::YVU_420:
     case gfx::BufferFormat::YUV_420_BIPLANAR:
     case gfx::BufferFormat::UYVY_422:
       NOTREACHED();
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
 GLint DataRowLength(size_t stride, gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::RG_88:
+    case gfx::BufferFormat::R_16:
     case gfx::BufferFormat::BGR_565:
     case gfx::BufferFormat::RGBA_4444:
       return base::checked_cast<GLint>(stride) / 2;
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::BGRA_8888:
       return base::checked_cast<GLint>(stride) / 4;
     case gfx::BufferFormat::RGBA_F16:
       return base::checked_cast<GLint>(stride) / 8;
@@ skipping 105 matching lines @@
                             dst[0] = src[2];
                             dst[1] = src[1];
                             dst[2] = src[0];
                           },
                           data_format, data_type, data_row_length);
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::RGBA_F16:
     case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::R_16:
     case gfx::BufferFormat::RG_88: {
       size_t gles2_data_stride =
           RowSizeForBufferFormat(size.width(), format, 0);
       if (stride == gles2_data_stride ||
           g_current_gl_driver->ext.b_GL_EXT_unpack_subimage)
         return nullptr;  // No data conversion needed
 
       std::unique_ptr<uint8_t[]> gles2_data(
           new uint8_t[gles2_data_stride * size.height()]);
       for (int y = 0; y < size.height(); ++y) {
@@ skipping 178 matching lines @@
   return Type::MEMORY;
 }
 
 // static
 unsigned GLImageMemory::GetInternalFormatForTesting(gfx::BufferFormat format) {
   DCHECK(ValidFormat(format));
   return TextureFormat(format);
 }
 
 }  // namespace gl