From bb3009c5fb6bc9e438225f35762cd9f7be442b91 Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Sat, 8 Dec 2018 19:32:22 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E5=AE=8C=E6=95=B4=E7=9A=84ds?=
 =?UTF-8?q?a=E6=89=A9=E5=B1=95=E6=A3=80=E6=B5=8B?=
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---
 inc/hgl/graph/RenderDriver.h      | 20 +---------
 src/RenderDriver/CMakeLists.txt   |  4 +-
 src/RenderDriver/OpenGLExt.cpp    | 62 ++++++++++++++++++++++++++++++-
 src/RenderDriver/Texture1D.cpp    |  3 +-
 src/RenderDriver/VertexBuffer.cpp |  3 +-
 5 files changed, 69 insertions(+), 23 deletions(-)

diff --git a/inc/hgl/graph/RenderDriver.h b/inc/hgl/graph/RenderDriver.h
index f50cbd1e..6f1aca39 100644
--- a/inc/hgl/graph/RenderDriver.h
+++ b/inc/hgl/graph/RenderDriver.h
@@ -6,25 +6,9 @@ namespace hgl
 {
     namespace graph
     {
-        /**
-        * 渲染驱动
-        * 用于对真实渲染API的交接管理
-        */
-        class RenderDriver
-        {
-        private:
-
-            RenderStatus current_status;
-
-        public:
-
-            virtual void SetCurStatus(const RenderStatus &)=0;
-
-            virtual void ClearColorBuffer()=0;
-            virtual void ClearDepthBuffer()=0;
-        };//class RenderDriver
-
         void InitOpenGLDebug();
+
+        bool IsSupportDSA();
     }//namespace graph
 }//namespace hgl
 #endif//HGL_RENDER_DRIVER_INCLUDE
diff --git a/src/RenderDriver/CMakeLists.txt b/src/RenderDriver/CMakeLists.txt
index 0ddfb4db..cf4fdb1d 100644
--- a/src/RenderDriver/CMakeLists.txt
+++ b/src/RenderDriver/CMakeLists.txt
@@ -1,11 +1,11 @@
-add_library(ULRE.RenderDriver STATIC    GLCore/RenderDriverGLCore.cpp
+add_library(ULRE.RenderDriver STATIC    OpenGLDebug.cpp
+                                        OpenGLExt.cpp
                                         GLSL.cpp
                                         Shader.cpp
                                         VertexArray.cpp
                                         VertexBuffer.cpp
                                         VertexBufferControlDSA.cpp
                                         VertexBufferControlBind.cpp
-                                        OpenGLDebug.cpp
                                         TextureFormat.cpp
                                         Texture1D.cpp
                                         Texture1DDSA.cpp
diff --git a/src/RenderDriver/OpenGLExt.cpp b/src/RenderDriver/OpenGLExt.cpp
index 324c8ccb..df659075 100644
--- a/src/RenderDriver/OpenGLExt.cpp
+++ b/src/RenderDriver/OpenGLExt.cpp
@@ -1,6 +1,66 @@
-#include<GL/glcorearb.h>
+#include<GLEWCore/glew.h>
 
 namespace hgl
 {
+    namespace graph
+    {
+        namespace
+        {
+            enum GLAPI_SUPPORT
+            {
+                gasNoSupport=-1,
+                gasNoCheck=0,
+                gasSupport=1
+            };
 
+            static GLAPI_SUPPORT support_dsa=gasNoCheck;
+        }
+
+        bool IsSupportDSA()
+        {
+            if(support_dsa==gasSupport)return(true);
+
+            //texture api
+            if(glCreateTextures
+             &&glGenerateTextureMipmap
+             &&glGetTextureLevelParameteriv
+             &&glGetTextureParameteriv
+             &&glGetCompressedTextureImage
+             &&glGetTextureImage
+             &&glBindTextureUnit
+             &&glCompressedTextureSubImage1D
+             &&glCompressedTextureSubImage2D
+             &&glTextureSubImage1D
+             &&glTextureSubImage2D
+
+             //sampler object
+             &&glGenSamplers
+             &&glBindSampler
+             &&glSamplerParameteri
+             &&glSamplerParameterfv
+
+             //vbo
+             &&glCreateBuffers
+             &&glNamedBufferData
+             &&glNamedBufferSubData
+
+             //vao
+             &&glCreateVertexArrays
+             &&glDeleteVertexArrays
+             &&glVertexArrayAttribBinding
+             &&glVertexArrayAttribFormat
+             &&glVertexArrayAttribIFormat
+             &&glVertexArrayAttribLFormat
+             &&glEnableVertexArrayAttrib
+             &&glVertexArrayVertexBuffer
+            )
+            {
+                support_dsa=gasSupport;
+                return(true);
+            }
+
+            support_dsa=gasNoSupport;
+            return(false);
+        }
+    }
 }//namespace hgl
diff --git a/src/RenderDriver/Texture1D.cpp b/src/RenderDriver/Texture1D.cpp
index aabd69b7..b4d823ab 100644
--- a/src/RenderDriver/Texture1D.cpp
+++ b/src/RenderDriver/Texture1D.cpp
@@ -1,5 +1,6 @@
 #include<hgl/graph/Texture1D.h>
 #include<hgl/LogInfo.h>
+#include<hgl/graph/RenderDriver.h>
 
 namespace hgl
 {
@@ -63,7 +64,7 @@ namespace hgl
 
         Texture1D *CreateTexture1D()
         {
-//             if(GLEW_VERSION_4_5||GLEW_ARB_direct_state_access||GL_EXT_direct_state_access)
+//            if(IsSupportDSA())
                 return CreateTexture1DDSA();
 //             else
 //                 return CreateTexture1DBind();
diff --git a/src/RenderDriver/VertexBuffer.cpp b/src/RenderDriver/VertexBuffer.cpp
index c0d59bd2..be993b20 100644
--- a/src/RenderDriver/VertexBuffer.cpp
+++ b/src/RenderDriver/VertexBuffer.cpp
@@ -2,6 +2,7 @@
 #include<hgl/graph/VertexArray.h>
 #include<GLEWCore/glew.h>
 #include"VertexBufferControl.h"
+#include<hgl/graph/RenderDriver.h>
 
 namespace hgl
 {
@@ -16,7 +17,7 @@ namespace hgl
 
             void InitVertexBufferAPI()
             {
-                if(GLEW_VERSION_4_5||GLEW_ARB_direct_state_access)
+                if(IsSupportDSA())
                     CreateVertexBufferControl=CreateVertexBufferControlDSA;
                 else
                     CreateVertexBufferControl=CreateVertexBufferControlBind;