gpu: Expose internal format R8 instead of RED.

ui/gl/gl_image_memory.cc

Index: ui/gl/gl_image_memory.cc
diff --git a/ui/gl/gl_image_memory.cc b/ui/gl/gl_image_memory.cc
index a29a388585fcd41406455446d0156f27deb0075d..f966f8572fa91c978aa1fd6c559457c8d8016bc0 100644
--- a/ui/gl/gl_image_memory.cc
+++ b/ui/gl/gl_image_memory.cc
@@ -26,7 +26,7 @@ bool ValidInternalFormat(unsigned internalformat) {
     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
     case GL_ETC1_RGB8_OES:
-    case GL_RED:
+    case GL_R8:
     case GL_RGB:
     case GL_RGBA:
     case GL_BGRA_EXT:
@@ -98,8 +98,16 @@ GLenum TextureFormat(BufferFormat format) {
       return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
     case BufferFormat::ETC1:
       return GL_ETC1_RGB8_OES;
-    case BufferFormat::R_8:
-      return GL_RED;
+    case BufferFormat::R_8: {
+      const gfx::GLVersionInfo* version_info =

[reveman, 2016/02/20 01:07:55]

ditto

[Daniele Castagna, 2016/02/20 01:16:16]

Done.

+          gfx::GLContext::GetCurrent()->GetVersionInfo();
+      if (version_info->IsAtLeastGL(3, 0) ||
+          version_info->IsAtLeastGLES(3, 0)) {
+        return GL_R8;
+      } else {
+        return GL_RED;
+      }
+    }
     case BufferFormat::RGBA_4444:
     case BufferFormat::RGBA_8888:
       return GL_RGBA;
@@ -125,10 +133,11 @@ GLenum DataFormat(BufferFormat format) {
       return GL_RGBA;
     case BufferFormat::BGRX_8888:
       return GL_BGRA_EXT;
+    case BufferFormat::R_8:
+      return GL_RED;
     case BufferFormat::RGBA_4444:
     case BufferFormat::RGBA_8888:
     case BufferFormat::BGRA_8888:
-    case BufferFormat::R_8:
     case BufferFormat::ATC:
     case BufferFormat::ATCIA:
     case BufferFormat::DXT1: