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engines/hpl1/engine/graphics/VertexBuffer.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#ifndef HPL_VERTEXBUFFER_H
+#define HPL_VERTEXBUFFER_H
+
+#include "hpl1/engine/graphics/GraphicsTypes.h"
+#include "hpl1/engine/math/BoundingVolume.h"
+#include "hpl1/engine/math/MathTypes.h"
+#include "hpl1/engine/system/SystemTypes.h"
+
+namespace hpl {
+
+class cBoundingVolume;
+
+enum eVertexBufferDrawType {
+	eVertexBufferDrawType_Tri,
+	eVertexBufferDrawType_Quad,
+	eVertexBufferDrawType_Lines,
+	eVertexBufferDrawType_LastEnum
+};
+
+enum eVertexBufferUsageType {
+	eVertexBufferUsageType_Static,
+	eVertexBufferUsageType_Dynamic,
+	eVertexBufferUsageType_Stream,
+	eVertexBufferUsageType_LastEnum
+};
+
+typedef tFlag tVertexFlag;
+
+#define eVertexFlag_Normal (0x00000001)
+#define eVertexFlag_Position (0x00000002)
+#define eVertexFlag_Color0 (0x00000004)
+#define eVertexFlag_Color1 (0x00000008)
+#define eVertexFlag_Texture0 (0x00000010)
+#define eVertexFlag_Texture1 (0x00000020)
+#define eVertexFlag_Texture2 (0x00000040)
+#define eVertexFlag_Texture3 (0x00000080)
+#define eVertexFlag_Texture4 (0x00000100)
+
+#define klNumOfVertexFlags (9)
+
+const tVertexFlag kvVertexFlags[] = {eVertexFlag_Normal, eVertexFlag_Position, eVertexFlag_Color0,
+									 eVertexFlag_Color1, eVertexFlag_Texture0, eVertexFlag_Texture1, eVertexFlag_Texture2,
+									 eVertexFlag_Texture3, eVertexFlag_Texture4};
+
+const int kvVertexElements[] = {
+	3, // Normal
+	4, // Position
+	4, // Color0
+	4, // Color1
+	3, // Texture0
+	3, // Texture1
+	3, // Texture2
+	3, // Texture3
+	3  // Texture4
+};
+
+typedef tFlag tVertexCompileFlag;
+
+#define eVertexCompileFlag_CreateTangents (0x00000001)
+
+class iLowLevelGraphics;
+
+class iVertexBuffer {
+public:
+	iVertexBuffer(iLowLevelGraphics *apLowLevelGraphics, tVertexFlag aFlags,
+				  eVertexBufferDrawType aDrawType, eVertexBufferUsageType aUsageType,
+				  int alReserveVtxSize, int alReserveIdxSize) : mVertexFlags(aFlags), mpLowLevelGraphics(apLowLevelGraphics),
+																mDrawType(aDrawType), mUsageType(aUsageType), mlElementNum(-1),
+																mbTangents(false) {}
+
+	virtual ~iVertexBuffer() {}
+
+	tVertexFlag GetFlags() { return mVertexFlags; }
+
+	virtual void AddVertex(tVertexFlag aType, const cVector3f &avVtx) = 0;
+	virtual void AddColor(tVertexFlag aType, const cColor &aColor) = 0;
+	virtual void AddIndex(unsigned int alIndex) = 0;
+
+	virtual bool Compile(tVertexCompileFlag aFlags) = 0;
+	virtual void UpdateData(tVertexFlag aTypes, bool abIndices) = 0;
+
+	/**
+	 * This creates a double of the vertex array with w=0.
+	 * \param abUpdateData if the hardware buffer should be updated as well.
+	 */
+	virtual void CreateShadowDouble(bool abUpdateData) = 0;
+
+	/**
+	 * Transform the entire buffer with transform.
+	 */
+	virtual void Transform(const cMatrixf &mtxTransform) = 0;
+
+	virtual void Draw(eVertexBufferDrawType aDrawType = eVertexBufferDrawType_LastEnum) = 0;
+	virtual void DrawIndices(unsigned int *apIndices, int alCount,
+							 eVertexBufferDrawType aDrawType = eVertexBufferDrawType_LastEnum) = 0;
+
+	virtual void Bind() = 0;
+	virtual void UnBind() = 0;
+
+	virtual iVertexBuffer *CreateCopy(eVertexBufferUsageType aUsageType) = 0;
+
+	virtual cBoundingVolume CreateBoundingVolume() = 0;
+
+	virtual float *GetArray(tVertexFlag aType) = 0;
+	virtual unsigned int *GetIndices() = 0;
+
+	virtual int GetVertexNum() = 0;
+	virtual int GetIndexNum() = 0;
+
+	/**
+	 * Resizes an array to a custom size, the size is number of elements and NOT number of vertices.
+	 */
+	virtual void ResizeArray(tVertexFlag aType, int alSize) = 0;
+	virtual void ResizeIndices(int alSize) = 0;
+
+	// For debugging purposes, quite slow to use.
+	virtual cVector3f GetVector3(tVertexFlag aType, unsigned alIdx) = 0;
+	virtual cVector3f GetVector4(tVertexFlag aType, unsigned alIdx) = 0;
+	virtual cColor GetColor(tVertexFlag aType, unsigned alIdx) = 0;
+	virtual unsigned int GetIndex(tVertexFlag aType, unsigned alIdx) = 0;
+
+	/**
+	 * Set the number of of elements to draw.
+	 * \param alNum If < 0, draw all indices.
+	 */
+	void SetElementNum(int alNum) { mlElementNum = alNum; }
+	int GetElementNum() { return mlElementNum; }
+
+	tVertexFlag GetVertexFlags() { return mVertexFlags; }
+
+	bool HasTangents() { return mbTangents; }
+	void SetTangents(bool abX) { mbTangents = abX; }
+
+protected:
+	tVertexFlag mVertexFlags;
+	eVertexBufferDrawType mDrawType;
+	eVertexBufferUsageType mUsageType;
+	iLowLevelGraphics *mpLowLevelGraphics;
+
+	int mlElementNum;
+
+	bool mbTangents;
+};
+
+} // namespace hpl
+
+#endif // HPL_RENDERER3D_H