+DefaultVertexLayout

1 files changed, 52 insertions, 0 deletions

diff --git a/Runtime/Graphics/DefaultVertexLayout.h b/Runtime/Graphics/DefaultVertexLayout.h
new file mode 100644
index 0000000..2d78518
--- /dev/null
+++ b/Runtime/Graphics/DefaultVertexLayout.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <vector>
+#include "../Utilities/UtilMacros.h"
+#include "../Shaders/ShaderChannel.h"
+#include "OpenGL.h"
+#include "GPUDataBuffer.h"
+#include "VertexAttribute.h"
+
+// 默认的顶点布局，适用于Mesh导入的结果，保持shader的一致性
+// 如果需要修改布局,比如编辑器UI中，用CustomVertexLayout
+
+// 默认的顶点属性以及顺序
+enum EVertexAttr
+{
+	VertexAttr_Position = 0,
+	VertexAttr_Normal,
+	VertexAttr_Tangent,
+	VertexAttr_Color,
+	VertexAttr_UV,
+	VertexAttr_UV2,
+	VertexAttr_UV3,
+	VertexAttr_UV4,
+
+	VertexAttr_Count
+};
+
+// GPU侧的默认顶点属性
+struct DefaultVertexLayout
+{
+	uint32 enableMask;
+	GLuint buffer; // vbo或者0(pinned memory)
+	VertexAttributeDescriptor attributes[VertexAttr_Count];
+};
+
+namespace VertexLayout
+{
+	extern uint GetDefaultIndexSize();
+	extern GLenum GetDefaultIndexFormat();
+
+	extern uint32 GetDynamicChunkStride(uint32 vertexAttrMask);
+	extern bool IsGLVertexAttrNeedNormalized(uint attr);
+	extern uint GetDefaultShaderChannelFormat(uint attr);
+	extern uint32 GetDefaultVertexAttrSize(int attr);
+	extern uint GetDefaultVertexAttrDimension(uint attr);
+	extern uint GetDefaultShaderChannelDimension(uint attr);
+	extern GLenum GetDefaultVertexAttrComponentType(uint attr);
+
+	void SetupDefaultVertexLayout(const DefaultVertexLayout& info);
+	void InvalidateVertexInputCache();
+
+}