Add caps and GL API for buffer texture

src/gpu/gl/GrGLInterface.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLExtensions.h"
@@ skipping 406 matching lines @@
     }
 
     // glVertexAttribIPointer was added in version 3.0 of both desktop and ES.
     if (glVer >= GR_GL_VER(3, 0)) {
         if (NULL == fFunctions.fVertexAttribIPointer) {
             RETURN_FALSE_INTERFACE
         }
     }
 
     if (kGL_GrGLStandard == fStandard) {
+        if (glVer >= GR_GL_VER(3,1)) {
+            if (nullptr == fFunctions.fTexBuffer) {
+                RETURN_FALSE_INTERFACE;
+            }
+        }
+    } else {
+        if (glVer >= GR_GL_VER(3,2) || fExtensions.has("GL_OES_texture_buffer") ||
+            fExtensions.has("GL_EXT_texture_buffer")) {
+            if (nullptr == fFunctions.fTexBuffer) {
+                RETURN_FALSE_INTERFACE;
+            }
+        }
+    }
+
+    if (kGL_GrGLStandard == fStandard) {
         if (glVer >= GR_GL_VER(3, 0) || fExtensions.has("GL_ARB_vertex_array_object")) {
             if (nullptr == fFunctions.fBindVertexArray ||
                 nullptr == fFunctions.fDeleteVertexArrays ||
                 nullptr == fFunctions.fGenVertexArrays) {
                 RETURN_FALSE_INTERFACE
             }
         }
     } else {
         if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_OES_vertex_array_object")) {
             if (nullptr == fFunctions.fBindVertexArray ||
@@ skipping 302 matching lines @@
                 nullptr == fFunctions.fDisableVertexArrayAttrib ||
                 nullptr == fFunctions.fGetVertexArrayIntegerv ||
                 nullptr == fFunctions.fGetVertexArrayPointerv ||
                 nullptr == fFunctions.fGetVertexArrayIntegeri_v ||
                 nullptr == fFunctions.fGetVertexArrayPointeri_v ||
                 nullptr == fFunctions.fMapNamedBufferRange ||
                 nullptr == fFunctions.fFlushMappedNamedBufferRange) {
                 RETURN_FALSE_INTERFACE
             }
         }
+        if (glVer >= GR_GL_VER(3,1)) {
+            if (nullptr == fFunctions.fTextureBuffer) {
+                RETURN_FALSE_INTERFACE;
+            }
+        }
     }
 
     if ((kGL_GrGLStandard == fStandard && glVer >= GR_GL_VER(4,3)) ||
         fExtensions.has("GL_KHR_debug")) {
         if (nullptr == fFunctions.fDebugMessageControl ||
             nullptr == fFunctions.fDebugMessageInsert ||
             nullptr == fFunctions.fDebugMessageCallback ||
             nullptr == fFunctions.fGetDebugMessageLog ||
             nullptr == fFunctions.fPushDebugGroup ||
             nullptr == fFunctions.fPopDebugGroup ||
             nullptr == fFunctions.fObjectLabel) {
             RETURN_FALSE_INTERFACE
         }
     }
 
     if (fExtensions.has("EGL_KHR_image") || fExtensions.has("EGL_KHR_image_base")) {
         if (nullptr == fFunctions.fEGLCreateImage ||
             nullptr == fFunctions.fEGLDestroyImage) {
             RETURN_FALSE_INTERFACE
         }
     }
 
     return true;
 }