// Copyright (c) 2012- PPSSPP Project. // 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, version 2.0 or later versions. // 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 2.0 for more details. // A copy of the GPL 2.0 should have been included with the program. // If not, see http://www.gnu.org/licenses/ // Official git repository and contact information can be found at // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/. #include "IndexGenerator.h" // Points don't need indexing... const u8 indexedPrimitiveType[7] = { GE_PRIM_POINTS, GE_PRIM_LINES, GE_PRIM_LINES, GE_PRIM_TRIANGLES, GE_PRIM_TRIANGLES, GE_PRIM_TRIANGLES, GE_PRIM_RECTANGLES, }; void IndexGenerator::Reset() { prim_ = -1; count_ = 0; index_ = 0; this->inds_ = indsBase_; } bool IndexGenerator::PrimCompatible(int prim) { if (prim_ == -1) return true; return indexedPrimitiveType[prim] == prim_; } void IndexGenerator::Setup(u16 *inds) { this->indsBase_ = inds; Reset(); } void IndexGenerator::AddPoints(int numVerts) { //if we have no vertices return for (int i = 0; i < numVerts; i++) { *inds_++ = index_ + i; } // ignore overflow verts index_ += numVerts; count_ += numVerts; prim_ = GE_PRIM_POINTS; } void IndexGenerator::AddList(int numVerts) { //if we have no vertices return int numTris = numVerts / 3; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + i*3; *inds_++ = index_ + i*3 + 1; *inds_++ = index_ + i*3 + 2; } // ignore overflow verts index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::AddStrip(int numVerts) { bool wind = false; int numTris = numVerts - 2; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + i; *inds_++ = index_ + i+(wind?2:1); *inds_++ = index_ + i+(wind?1:2); wind = !wind; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::AddFan(int numVerts) { int numTris = numVerts - 2; for (int i = 0; i < numTris; i++) { *inds_++ = index_; *inds_++ = index_ + i + 1; *inds_++ = index_ + i + 2; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::TranslatePoints(int numVerts, const u8 *inds, int offset) { for (int i = 0; i < numVerts; i++) { *inds_++ = index_ + offset + inds[i]; } index_ += numVerts; count_ += numVerts; prim_ = GE_PRIM_POINTS; } void IndexGenerator::TranslatePoints(int numVerts, const u16 *inds, int offset) { for (int i = 0; i < numVerts; i++) { *inds_++ = index_ + offset + inds[i]; } index_ += numVerts; count_ += numVerts; prim_ = GE_PRIM_POINTS; } void IndexGenerator::TranslateList(int numVerts, const u8 *inds, int offset) { int numTris = numVerts / 3; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + offset + inds[i*3]; *inds_++ = index_ + offset + inds[i*3 + 1]; *inds_++ = index_ + offset + inds[i*3 + 2]; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::TranslateStrip(int numVerts, const u8 *inds, int offset) { bool wind = false; int numTris = numVerts - 2; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + offset + inds[i]; *inds_++ = index_ + offset + inds[i + (wind?2:1)]; *inds_++ = index_ + offset + inds[i + (wind?1:2)]; wind = !wind; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::TranslateFan(int numVerts, const u8 *inds, int offset) { if (numVerts <= 0) return; int numTris = numVerts - 2; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + offset + inds[i]; *inds_++ = index_ + offset + inds[i + 1]; *inds_++ = index_ + offset + inds[i + 2]; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::TranslateList(int numVerts, const u16 *inds, int offset) { int numTris = numVerts / 3; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + offset + inds[i*3]; *inds_++ = index_ + offset + inds[i*3 + 1]; *inds_++ = index_ + offset + inds[i*3 + 2]; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::TranslateStrip(int numVerts, const u16 *inds, int offset) { bool wind = false; int numTris = numVerts - 2; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + offset + inds[i]; *inds_++ = index_ + offset + inds[i + (wind?2:1)]; *inds_++ = index_ + offset + inds[i + (wind?1:2)]; wind = !wind; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } void IndexGenerator::TranslateFan(int numVerts, const u16 *inds, int offset) { if (numVerts <= 0) return; int numTris = numVerts - 2; for (int i = 0; i < numTris; i++) { *inds_++ = index_ + offset + inds[i]; *inds_++ = index_ + offset + inds[i + 1]; *inds_++ = index_ + offset + inds[i + 2]; } index_ += numVerts; count_ += numTris * 3; prim_ = GE_PRIM_TRIANGLES; } //Lines void IndexGenerator::AddLineList(int numVerts) { int numLines = numVerts / 2; for (int i = 0; i < numLines; i++) { *inds_++ = index_ + i*2; *inds_++ = index_ + i*2+1; } index_ += numVerts; count_ += numLines * 2; prim_ = GE_PRIM_LINES; } void IndexGenerator::AddLineStrip(int numVerts) { int numLines = numVerts - 1; for (int i = 0; i < numLines; i++) { *inds_++ = index_ + i; *inds_++ = index_ + i + 1; } index_ += numVerts; count_ += numLines * 2; prim_ = GE_PRIM_LINES; } void IndexGenerator::AddRectangles(int numVerts) { int numRects = numVerts / 2; for (int i = 0; i < numRects; i++) { *inds_++ = index_ + i*2; *inds_++ = index_ + i*2+1; } index_ += numVerts; count_ += numRects * 2; prim_ = GE_PRIM_RECTANGLES; } void IndexGenerator::TranslateLineList(int numVerts, const u8 *inds, int offset) { int numLines = numVerts / 2; for (int i = 0; i < numLines; i++) { *inds_++ = index_ + i*2; *inds_++ = index_ + i*2+1; } index_ += numVerts; count_ += numLines * 2; prim_ = GE_PRIM_LINES; } void IndexGenerator::TranslateLineStrip(int numVerts, const u8 *inds, int offset) { int numLines = numVerts - 1; for (int i = 0; i < numLines; i++) { *inds_++ = index_ + i; *inds_++ = index_ + i + 1; } index_ += numVerts; count_ += numLines * 2; prim_ = GE_PRIM_LINES; } void IndexGenerator::TranslateLineList(int numVerts, const u16 *inds, int offset) { int numLines = numVerts / 2; for (int i = 0; i < numLines; i++) { *inds_++ = index_ + i*2; *inds_++ = index_ + i*2+1; } index_ += numVerts; count_ += numLines * 2; prim_ = GE_PRIM_LINES; } void IndexGenerator::TranslateLineStrip(int numVerts, const u16 *inds, int offset) { int numLines = numVerts - 1; for (int i = 0; i < numLines; i++) { *inds_++ = index_ + i; *inds_++ = index_ + i + 1; } index_ += numVerts; count_ += numLines * 2; prim_ = GE_PRIM_LINES; } void IndexGenerator::TranslateRectangles(int numVerts, const u8 *inds, int offset) { int numRects = numVerts / 2; for (int i = 0; i < numRects; i++) { *inds_++ = index_ + i*2; *inds_++ = index_ + i*2+1; } index_ += numVerts; count_ += numRects * 2; prim_ = GE_PRIM_RECTANGLES; } void IndexGenerator::TranslateRectangles(int numVerts, const u16 *inds, int offset) { int numRects = numVerts / 2; for (int i = 0; i < numRects; i++) { *inds_++ = index_ + i*2; *inds_++ = index_ + i*2+1; } index_ += numVerts; count_ += numRects * 2; prim_ = GE_PRIM_RECTANGLES; }