From c302f5ae5f9e30a28e487e8a764d9cc31546bbea Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Fri, 29 Mar 2019 22:51:04 +0800
Subject: *rename

---
 source/modules/asura-core/graphics/shader.h | 126 ++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 source/modules/asura-core/graphics/shader.h

(limited to 'source/modules/asura-core/graphics/shader.h')

diff --git a/source/modules/asura-core/graphics/shader.h b/source/modules/asura-core/graphics/shader.h
new file mode 100644
index 0000000..97e2c15
--- /dev/null
+++ b/source/modules/asura-core/graphics/shader.h
@@ -0,0 +1,126 @@
+#ifndef __ASURA_ENGINE_SHADER_H__
+#define __ASURA_ENGINE_SHADER_H__
+
+#include <map>
+#include <string>
+
+#include <asura-utils/scripting/portable.hpp>
+#include <asura-utils/io/reloadable.h>
+#include <asura-utils/math/vector2.hpp>
+#include <asura-utils/math/vector3.hpp>
+#include <asura-utils/math/vector4.h>
+#include <asura-utils/math/matrix44.h>
+#include <asura-utils/stringmap.hpp>
+#include <asura-utils/manager.hpp>
+
+#include "color.h"
+#include "texture.h"
+#include "gl.h"
+
+namespace AsuraEngine
+{
+	namespace Graphics
+	{
+
+		///
+		/// 一个shader是一个在材质间共享的程序。Shader本身不保存uniforms和顶点数据，只提供设置uniforms和use着色器的方法。编辑
+		/// 器针对每个shader，会通过shader代码找到声明的uniforms变量，并暴露给framework的material设置。
+		///
+		class Shader ASURA_FINAL
+			: public Scripting::Portable<Shader>
+			, public AEIO::Reloadable
+		{
+		public:
+
+			Shader();
+
+			~Shader();
+
+			///
+			/// 从代码编译shader，编译时会先检测是否有上次缓存的uniforms location map。使用glAttachShader重新编译生成着色器，
+			/// 不会重新申请着色器程序。
+			///
+			bool Load(const std::string& vertexShader, const std::string& fragmentShader);
+
+			///
+			/// 将当期shader设置为活动
+			///
+			void Use();
+
+			///
+			/// 将当期shader设置为非活动
+			///
+			void Unuse();
+
+			///
+			/// 在已经知道uniform location的情况下，设置值。
+			///
+			void SetUniformFloat(uint loc, float value);
+			void SetUniformTexture(uint loc, const Texture& texture);
+			void SetUniformVector2(uint loc, const Math::Vector2f& vec2);
+			void SetUniformVector3(uint loc, const Math::Vector3f& vec3);
+			void SetUniformVector4(uint loc, const Math::Vector4f& vec4);
+			void SetUniformColor(uint loc, const Color& color);
+			void SetUniformMatrix44(uint loc, const Math::Matrix44& mat44);
+
+			uint GetUniformLocation(const std::string& uniform);
+
+			bool HasUniform(const std::string& uniform);
+
+			GLuint GetGLProgramHandle();
+
+			///
+			/// 获得texture unit数量，一般为16个
+			///
+			static uint GetGLTextureUnitCount();
+
+		private:
+
+			///
+			/// 当前活动的shader
+			///
+			static Shader* mCurrentShader;
+
+			///
+			/// 设置内置变量：
+			///	    vec2	Asura_Time             x值为进入当前场景开始的时间，y值为上一帧的时间间隔
+			///	    vec2	Asura_RenderTargetSize RT的大小，以像素为单位
+			///	    Texture Asura_MainTexture	   主纹理
+			///
+			void SetBuiltInUniforms();
+
+			///
+			/// OpenGL shader program handle.
+			/// 
+			GLuint mProgramHandle;
+
+		//------------------------------------------------------------------------------//
+
+		public:
+
+			LUAX_DECL_FACTORY(SimShader);
+
+			LUAX_DECL_METHOD(_New);
+			LUAX_DECL_METHOD(_Use);
+			LUAX_DECL_METHOD(_Unuse);
+			LUAX_DECL_METHOD(_Load);
+			LUAX_DECL_METHOD(_HasUniform);
+			LUAX_DECL_METHOD(_GetUniformLocation);
+			LUAX_DECL_METHOD(_SetBuiltInUniforms);
+			LUAX_DECL_METHOD(_SetUniformFloat);
+			LUAX_DECL_METHOD(_SetUniformTexture);
+			LUAX_DECL_METHOD(_SetUniformVector2);
+			LUAX_DECL_METHOD(_SetUniformVector3);
+			LUAX_DECL_METHOD(_SetUniformVector4);
+			LUAX_DECL_METHOD(_SetUniformColor);
+
+		private:
+
+			Luax::LuaxMemberRef mCodeLuaRef;
+
+		};
+
+	}
+}
+
+#endif
\ No newline at end of file
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