| // SwiftShader Software Renderer |
| // |
| // Copyright(c) 2005-2011 TransGaming Inc. |
| // |
| // All rights reserved. No part of this software may be copied, distributed, transmitted, |
| // transcribed, stored in a retrieval system, translated into any human or computer |
| // language by any means, or disclosed to third parties without the explicit written |
| // agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express |
| // or implied, including but not limited to any patent rights, are granted to you. |
| // |
| |
| #ifndef sw_Clipper_hpp |
| #define sw_Clipper_hpp |
| |
| #include "Plane.hpp" |
| #include "Common/Types.hpp" |
| |
| namespace sw |
| { |
| struct Polygon; |
| struct DrawCall; |
| struct DrawData; |
| |
| class Clipper |
| { |
| public: |
| enum ClipFlags |
| { |
| CLIP_RIGHT = 1 << 0, |
| CLIP_TOP = 1 << 1, |
| CLIP_FAR = 1 << 2, |
| CLIP_LEFT = 1 << 3, |
| CLIP_BOTTOM = 1 << 4, |
| CLIP_NEAR = 1 << 5, |
| |
| CLIP_FINITE = 1 << 7, |
| |
| // User-defined clipping planes |
| CLIP_PLANE0 = 1 << 8, |
| CLIP_PLANE1 = 1 << 9, |
| CLIP_PLANE2 = 1 << 10, |
| CLIP_PLANE3 = 1 << 11, |
| CLIP_PLANE4 = 1 << 12, |
| CLIP_PLANE5 = 1 << 13 |
| }; |
| |
| Clipper(); |
| |
| ~Clipper(); |
| |
| bool clip(Polygon &polygon, int clipFlagsOr, const DrawCall &draw); |
| |
| private: |
| void clipNear(Polygon &polygon); |
| void clipFar(Polygon &polygon); |
| void clipLeft(Polygon &polygon, const DrawData &data); |
| void clipRight(Polygon &polygon, const DrawData &data); |
| void clipTop(Polygon &polygon, const DrawData &data); |
| void clipBottom(Polygon &polygon, const DrawData &data); |
| void clipPlane(Polygon &polygon, const Plane &plane); |
| |
| void clipEdge(float4 &Vo, const float4 &Vi, const float4 &Vj, float di, float dj) const; |
| }; |
| } |
| |
| #endif // sw_Clipper_hpp |