+init

1 files changed, 164 insertions, 0 deletions

diff --git a/Client/Source/Graphics/RenderCommands.h b/Client/Source/Graphics/RenderCommands.h
new file mode 100644
index 0000000..f66b4e2
--- /dev/null
+++ b/Client/Source/Graphics/RenderCommands.h
@@ -0,0 +1,164 @@
+#pragma once
+#include "OpenGL.h"
+#include <vector>
+
+struct RenderCommand
+{
+	virtual void Execute() = 0;
+};
+
+typedef std::vector<RenderCommand*> RenderCommandGroup;
+void ReleaseRenderCommandGroup(RenderCommandGroup& group);
+
+// Cull Off|Front|Back|Both
+struct Cmd_Cull : RenderCommand
+{
+	enum ECullFace {
+		Cull_Disable, 
+		Cull_Front,
+		Cull_Back,
+		Cull_Both,
+	};
+
+	ECullFace cull;
+
+	void Execute() override
+	{
+		if (cull == ECullFace::Cull_Disable)
+		{
+			glDisable(GL_CULL_FACE);
+			return;
+		}
+		glEnable(GL_CULL_FACE);
+		switch (cull)
+		{
+			case ECullFace::Cull_Front: glCullFace(GL_FRONT); break;
+			case ECullFace::Cull_Back: glCullFace(GL_BACK); break;
+			case ECullFace::Cull_Both: glCullFace(GL_FRONT_AND_BACK); break;
+		}
+	}
+};
+
+// Blend Off
+// Blend <srcFac> <dstFac>
+struct Cmd_Blend : RenderCommand
+{
+	enum EBlend
+	{
+		Blend_Zero,						// 0
+		Blend_One,						// 1
+		Blend_Src_Color,				// 源颜色向量C¯source
+		Blend_One_Minus_Src_Color,		//  1−C¯source
+		Blend_Dst_Color,				// 目标颜色向量C¯destination
+		Blend_One_Minus_Dst_Color,		//  1−C¯destination
+		Blend_Src_Alpha,				// C¯source的alpha值
+		Blend_One_Minus_Src_Alpha,		//  1− C¯source的alpha值
+		Blend_Dst_Alpha,				//  C¯destination的alpha值
+		Blend_One_Minus_Dst_Alpha,		//  1− C¯destination的alpha值
+		Blend_Constant_Color,			// 常颜色向量C¯constant
+		Blend_One_Minus_Constant_Color,	// 1−C¯constant
+		Blend_Constant_Alpha,			// C¯constant的alpha值
+		Blend_One_Minus_Constant_Alpha,	// 1− C¯constant的alpha值
+	};
+
+	bool enable;
+	EBlend srcFac;
+	EBlend dstFac;
+
+	void Execute() override
+	{
+		if (!enable)
+			glDisable(GL_BLEND);
+		glEnable(GL_BLEND);
+        glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
+		GLenum src, dst;
+		switch (srcFac)
+		{
+			case EBlend::Blend_Zero: src = GL_ZERO; break;
+			case EBlend::Blend_One: src = GL_ONE; break;
+			case EBlend::Blend_Src_Color: src = GL_SRC_COLOR; break;
+			case EBlend::Blend_One_Minus_Src_Color: src = GL_ONE_MINUS_SRC_COLOR; break;
+			case EBlend::Blend_Dst_Color: src = GL_DST_COLOR; break;
+			case EBlend::Blend_One_Minus_Dst_Color: src = GL_ONE_MINUS_DST_COLOR; break;
+			case EBlend::Blend_Src_Alpha: src = GL_SRC_ALPHA; break;
+			case EBlend::Blend_One_Minus_Src_Alpha: src = GL_ONE_MINUS_SRC_ALPHA; break;
+			case EBlend::Blend_Dst_Alpha: src = GL_DST_ALPHA; break;
+			case EBlend::Blend_One_Minus_Dst_Alpha: src = GL_ONE_MINUS_DST_ALPHA; break;
+			case EBlend::Blend_Constant_Color: src = GL_CONSTANT_COLOR; break;
+			case EBlend::Blend_One_Minus_Constant_Color: src = GL_ONE_MINUS_CONSTANT_COLOR; break;
+			case EBlend::Blend_Constant_Alpha: src = GL_CONSTANT_ALPHA; break;
+			case EBlend::Blend_One_Minus_Constant_Alpha: src = GL_ONE_MINUS_CONSTANT_ALPHA; break;
+		}
+		switch (dstFac)
+		{
+			case EBlend::Blend_Zero: dst = GL_ZERO; break;
+			case EBlend::Blend_One: dst = GL_ONE; break;
+			case EBlend::Blend_Src_Color: dst = GL_SRC_COLOR; break;
+			case EBlend::Blend_One_Minus_Src_Color: dst = GL_ONE_MINUS_SRC_COLOR; break;
+			case EBlend::Blend_Dst_Color: dst = GL_DST_COLOR; break;
+			case EBlend::Blend_One_Minus_Dst_Color: dst = GL_ONE_MINUS_DST_COLOR; break;
+			case EBlend::Blend_Src_Alpha: dst = GL_SRC_ALPHA; break;
+			case EBlend::Blend_One_Minus_Src_Alpha: dst = GL_ONE_MINUS_SRC_ALPHA; break;
+			case EBlend::Blend_Dst_Alpha: dst = GL_DST_ALPHA; break;
+			case EBlend::Blend_One_Minus_Dst_Alpha: dst = GL_ONE_MINUS_DST_ALPHA; break;
+			case EBlend::Blend_Constant_Color: dst = GL_CONSTANT_COLOR; break;
+			case EBlend::Blend_One_Minus_Constant_Color: dst = GL_ONE_MINUS_CONSTANT_COLOR; break;
+			case EBlend::Blend_Constant_Alpha: dst = GL_CONSTANT_ALPHA; break;
+			case EBlend::Blend_One_Minus_Constant_Alpha: dst = GL_ONE_MINUS_CONSTANT_ALPHA; break;
+		}
+		glBlendFunc(src, dst);
+	}
+};
+
+// DepthTest Off|<func>
+struct Cmd_DepthTest : RenderCommand
+{
+	enum EDepthTest
+	{
+		DepthTest_Off,      // 不进行深度测试
+		DepthTest_Always,   // 永远通过测试
+		DepthTest_Never,    // 永远不通过测试
+		DepthTest_Less,	    // 在片段深度值小于缓冲区的深度时通过测试
+		DepthTest_Equal,    // 在片段深度值等于缓冲区的深度时通过测试
+		DepthTest_Lequal,   // 在片段深度值小于等于缓冲区的深度时通过测试
+		DepthTest_Greater,  // 在片段深度值大于缓冲区的深度时通过测试
+		DepthTest_Notequal, // 在片段深度值不等于缓冲区的深度时通过测试
+		DepthTest_Gequal,   // 在片段深度值大于等于缓冲区的深度时通过测试
+	};
+
+	EDepthTest test;
+
+	void Execute() override
+	{
+		if (test == EDepthTest::DepthTest_Off)
+		{
+			glDisable(GL_DEPTH_TEST);
+			return;
+		}
+		glEnable(GL_DEPTH_TEST);
+		switch (test)
+		{
+			case EDepthTest::DepthTest_Always:    glDepthFunc(GL_ALWAYS); break;
+			case EDepthTest::DepthTest_Never:	  glDepthFunc(GL_NEVER); break;
+			case EDepthTest::DepthTest_Less:	  glDepthFunc(GL_LESS); break;
+			case EDepthTest::DepthTest_Equal:	  glDepthFunc(GL_EQUAL); break;
+			case EDepthTest::DepthTest_Lequal:	  glDepthFunc(GL_LEQUAL); break;
+			case EDepthTest::DepthTest_Greater:	  glDepthFunc(GL_GREATER); break;
+			case EDepthTest::DepthTest_Notequal:  glDepthFunc(GL_NOTEQUAL); break;
+			case EDepthTest::DepthTest_Gequal:	  glDepthFunc(GL_GEQUAL); break;
+		}
+	}
+};
+
+// DepthWrite Off|On
+struct Cmd_DepthWrite : RenderCommand
+{
+	bool write;
+	void Execute() override
+	{
+		if(write)
+			glDepthMask(GL_TRUE);
+		else 
+			glDepthMask(GL_FALSE);
+	}
+};