refactor to allow various gfx backends (work-in-progress)

btgui/OpenGLWindow/CommonRenderInterface.h

@@ -0,0 +1,50 @@
+#ifndef COMMON_RENDER_INTERFACE_H
+#define COMMON_RENDER_INTERFACE_H
+
+enum
+{
+	B3_GL_TRIANGLES = 1,
+	B3_GL_POINTS
+};
+
+enum 
+{
+	B3_DEFAULT_RENDERMODE=1,
+	//B3_WIREFRAME_RENDERMODE,
+	B3_CREATE_SHADOWMAP_RENDERMODE,
+	B3_USE_SHADOWMAP_RENDERMODE,
+};
+
+struct CommonRenderInterface
+{
+	virtual void init()=0;
+	virtual void updateCamera(int upAxis)=0;
+	virtual void removeAllInstances() = 0;
+	virtual void setCameraDistance(float dist) = 0;
+	virtual void setCameraPitch(float pitch) = 0;
+	virtual void setCameraTargetPosition(float x, float y, float z)=0;
+	
+	
+	virtual void	getCameraPosition(float cameraPos[4])=0;
+	virtual void	getCameraPosition(double cameraPos[4])=0;
+
+	virtual void	setCameraTargetPosition(float cameraPos[4])=0;
+	virtual void	getCameraTargetPosition(float cameraPos[4]) const=0;
+    virtual void	getCameraTargetPosition(double cameraPos[4]) const=0;
+
+	virtual void renderScene()=0;
+
+	virtual int getScreenWidth() = 0;
+	virtual int getScreenHeight() = 0;
+
+	virtual int registerGraphicsInstance(int shapeIndex, const float* position, const float* quaternion, const float* color, const float* scaling)=0;
+	virtual void drawLines(const float* positions, const float color[4], int numPoints, int pointStrideInBytes, const unsigned int* indices, int numIndices, float pointDrawSize)=0;
+	virtual void drawLine(const float from[4], const float to[4], const float color[4], float lineWidth) = 0;
+	virtual int registerShape(const float* vertices, int numvertices, const int* indices, int numIndices,int primitiveType=B3_GL_TRIANGLES, int textureIndex=-1)=0;
+
+	virtual void writeSingleInstanceTransformToCPU(const float* position, const float* orientation, int srcIndex)=0;
+	virtual void writeSingleInstanceTransformToCPU(const double* position, const double* orientation, int srcIndex)=0;
+	virtual void writeTransforms()=0;
+};
+#endif//COMMON_RENDER_INTERFACE_H
+