mirror of
https://github.com/hrydgard/ppsspp.git
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130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include "Common/CommonTypes.h"
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#include "Common/Swap.h"
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#include "GPU/ge_constants.h"
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class IndexGenerator {
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public:
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void Setup(u16 *indexptr);
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void Reset() {
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prim_ = GE_PRIM_INVALID;
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count_ = 0;
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index_ = 0;
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seenPrims_ = 0;
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pureCount_ = 0;
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this->inds_ = indsBase_;
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}
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bool PrimCompatible(int prim1, int prim2) {
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if (prim1 == GE_PRIM_INVALID || prim2 == GE_PRIM_KEEP_PREVIOUS)
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return true;
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return indexedPrimitiveType[prim1] == indexedPrimitiveType[prim2];
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}
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bool PrimCompatible(int prim) const {
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if (prim_ == GE_PRIM_INVALID || prim == GE_PRIM_KEEP_PREVIOUS)
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return true;
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return indexedPrimitiveType[prim] == prim_;
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}
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GEPrimitiveType Prim() const { return prim_; }
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GEPrimitiveType GeneralPrim() const {
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switch (prim_) {
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case GE_PRIM_LINE_STRIP: return GE_PRIM_LINES; break;
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case GE_PRIM_TRIANGLE_STRIP:
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case GE_PRIM_TRIANGLE_FAN: return GE_PRIM_TRIANGLES; break;
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default:
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return prim_;
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}
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}
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void AddPrim(int prim, int vertexCount, bool clockwise);
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void TranslatePrim(int prim, int numInds, const u8 *inds, int indexOffset, bool clockwise);
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void TranslatePrim(int prim, int numInds, const u16_le *inds, int indexOffset, bool clockwise);
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void TranslatePrim(int prim, int numInds, const u32_le *inds, int indexOffset, bool clockwise);
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void Advance(int numVerts) {
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index_ += numVerts;
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}
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void SetIndex(int ind) { index_ = ind; }
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int MaxIndex() const { return index_; } // Really NextIndex rather than MaxIndex, it's one more than the highest index generated
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int VertexCount() const { return count_; }
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bool Empty() const { return index_ == 0; }
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int SeenPrims() const { return seenPrims_; }
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int PureCount() const { return pureCount_; }
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bool SeenOnlyPurePrims() const {
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return seenPrims_ == (1 << GE_PRIM_TRIANGLES) ||
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seenPrims_ == (1 << GE_PRIM_LINES) ||
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seenPrims_ == (1 << GE_PRIM_POINTS) ||
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seenPrims_ == (1 << GE_PRIM_TRIANGLE_STRIP);
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}
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private:
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// Points (why index these? code simplicity)
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void AddPoints(int numVerts);
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// Triangles
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void AddList(int numVerts, bool clockwise);
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void AddStrip(int numVerts, bool clockwise);
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void AddFan(int numVerts, bool clockwise);
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// Lines
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void AddLineList(int numVerts);
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void AddLineStrip(int numVerts);
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// Rectangles
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void AddRectangles(int numVerts);
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// These translate already indexed lists
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template <class ITypeLE, int flag>
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void TranslatePoints(int numVerts, const ITypeLE *inds, int indexOffset);
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template <class ITypeLE, int flag>
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void TranslateList(int numVerts, const ITypeLE *inds, int indexOffset, bool clockwise);
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template <class ITypeLE, int flag>
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inline void TranslateLineList(int numVerts, const ITypeLE *inds, int indexOffset);
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template <class ITypeLE, int flag>
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inline void TranslateLineStrip(int numVerts, const ITypeLE *inds, int indexOffset);
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template <class ITypeLE, int flag>
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void TranslateStrip(int numVerts, const ITypeLE *inds, int indexOffset, bool clockwise);
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template <class ITypeLE, int flag>
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void TranslateFan(int numVerts, const ITypeLE *inds, int indexOffset, bool clockwise);
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template <class ITypeLE, int flag>
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inline void TranslateRectangles(int numVerts, const ITypeLE *inds, int indexOffset);
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enum {
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SEEN_INDEX8 = 1 << 16,
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SEEN_INDEX16 = 1 << 17,
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SEEN_INDEX32 = 1 << 18,
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};
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u16 *indsBase_;
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u16 *inds_;
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int index_;
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int count_;
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int pureCount_;
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GEPrimitiveType prim_;
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int seenPrims_;
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static const u8 indexedPrimitiveType[7];
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};
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