mirror of
https://github.com/ZDoom/raze-gles.git
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- deleted the tilepacker.
This commit is contained in:
Christoph Oelckers
parent
e0f823a492
commit
30dac6be74
2 changed files with 0 additions and 420 deletions
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/*
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* tilepacker.h
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* A k-d tree based bin packer that organizes rectangular tiles to fit
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* neatly into one texture.
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*
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* Copyright © 2018, Alex Dawson. All rights reserved.
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*/
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#ifndef TILEPACKER_H_
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#define TILEPACKER_H_
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#define MAXTILESHEETS 64
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#define MAXPACKEDTILES MAXTILES+1
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typedef struct
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{
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uint32_t u, v, width, height;
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} TileRect;
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typedef struct
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{
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uint32_t tilesheetID;
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TileRect rect;
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} Tile;
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// Initialize the specified tilesheet
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// tilesheetId must be less than MAXTILESHEETS
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// Re-initializing an existing tilesheet will discard all of its contents
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void tilepacker_initTilesheet(uint32_t tilesheetID, uint32_t tilesheetWidth, uint32_t tilesheetHeight);
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// Adds a tile into sorted collection to be packed
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// uid can be any unique key -- picnums are used for indexed colour textures
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void tilepacker_addTile(uint32_t tileUID, uint32_t tileWidth, uint32_t tileHeight);
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// Packs the sorted collection of tiles that have been added with tilepacker_addTile()
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// Returns true if all nodes could be packed succesfully into the specified tilesheet
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// tilepacker_pack can be called again with a different tilesheetId to pack the remaining tiles
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char tilepacker_pack(uint32_t tilesheetID);
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// Discard the rejected tiles so that they will not be carried over to the next call to tilepacker_pack
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void tilepacker_discardRejects();
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// Sets pOutput to contain the Tile information for a packed tile with the given tileUID
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// Returns true if the Tile has been packed, false otherwise
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// If pOutput is NULL, the function solely returns whether or not the Tile has been packed
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char tilepacker_getTile(uint32_t tileUID, Tile *pOutput);
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// Returns true if the Tile with tileUID has been packed, false otherwise
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static inline char tilepacker_isTilePacked(uint32_t tileUID)
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{
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return tilepacker_getTile(tileUID, NULL);
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};
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#endif /* TILEPACKER_H_ */
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/*
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* tilepacker.cpp
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* A k-d tree based bin packer that organizes rectangular tiles to fit
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* neatly into one texture.
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*
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* Copyright © 2018, Alex Dawson. All rights reserved.
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*/
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#include "compat.h"
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#include "build.h"
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#include "tilepacker.h"
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typedef struct TreeNode
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{
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struct TreeNode *pParent, *pChild0, *pChild1;
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TileRect rect;
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uint32_t maxSide;
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uint32_t tileUID;
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} TreeNode;
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// allocate all the memory we could ever need up front to avoid dynamic allocation
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#define NUM_NON_ROOT_NODES MAXPACKEDTILES*2
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#define NUM_NODES NUM_NON_ROOT_NODES+MAXTILESHEETS
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TreeNode nodes[NUM_NODES];
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uint32_t heapNodes = 0;
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uint32_t nextTreeNodeIndex = NUM_NON_ROOT_NODES-1;
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Tile tiles[MAXPACKEDTILES];
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// node rejection queue implemented using a circular buffer
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#define MAX_REJECTS (MAXPACKEDTILES-1)
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TreeNode rejectQueue[MAX_REJECTS];
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uint32_t rejectQueueHeadIndex = 0;
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uint32_t numRejected = 0;
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#if 0
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static void maxheap_bubbleUp(uint32_t nodeIndex)
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{
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while (true)
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{
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if (nodeIndex == 0)
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{
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return;
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}
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uint32_t parentIndex = (nodeIndex-1)/2;
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if (nodes[parentIndex].maxSide >= nodes[nodeIndex].maxSide)
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{
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return;
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}
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// bubble up
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TreeNode temp = nodes[nodeIndex];
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nodes[nodeIndex] = nodes[parentIndex];
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nodes[parentIndex] = temp;
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nodeIndex = parentIndex;
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}
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}
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#endif
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static void maxheap_bubbleDown(uint32_t nodeIndex)
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{
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while (true)
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{
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uint32_t largestChildIndex = 2*nodeIndex + 1;
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if (largestChildIndex >= heapNodes)
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{
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return;
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}
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uint32_t rightChildIndex = largestChildIndex+1;
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if (rightChildIndex < heapNodes &&
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nodes[rightChildIndex].maxSide > nodes[largestChildIndex].maxSide)
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{
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largestChildIndex = rightChildIndex;
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}
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if (nodes[largestChildIndex].maxSide <= nodes[nodeIndex].maxSide)
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{
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return;
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}
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// bubble down
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TreeNode temp = nodes[nodeIndex];
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nodes[nodeIndex] = nodes[largestChildIndex];
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nodes[largestChildIndex] = temp;
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nodeIndex = largestChildIndex;
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}
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}
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static void maxheap_buildHeap()
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{
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for (int i = (heapNodes-2)/2; i >= 0; --i)
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{
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maxheap_bubbleDown(i);
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}
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}
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static TreeNode* maxheap_pop()
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{
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if (heapNodes == 0)
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{
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return NULL;
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}
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// swap the root and the last node
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TreeNode temp = nodes[0];
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nodes[0] = nodes[heapNodes-1];
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nodes[heapNodes-1] = temp;
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--heapNodes;
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maxheap_bubbleDown(0);
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return nodes+heapNodes;
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}
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static TreeNode* maxheap_reserveNode(TreeNode *pParent,
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TreeNode *pChild0,
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TreeNode *pChild1,
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TileRect rectangle,
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uint32_t tileUID)
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{
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if (heapNodes == nextTreeNodeIndex+1)
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{
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// our tree and heap are going to collide
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#ifdef DEBUGGINGAIDS
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OSD_Printf("tilepacker: maxheap_reserveNode(): out of nodes\n");
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#endif
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return NULL;
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}
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nodes[heapNodes] = {(TreeNode*) pParent,
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(TreeNode*) pChild0,
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(TreeNode*) pChild1,
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rectangle,
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rectangle.width >= rectangle.height ? rectangle.width : rectangle.height,
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tileUID};
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++heapNodes;
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return nodes+heapNodes-1;
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}
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static TreeNode* kdtree_reserveNode(TreeNode *pParent,
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TreeNode *pChild0,
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TreeNode *pChild1,
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TileRect rectangle,
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uint32_t tileUID)
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{
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if (nextTreeNodeIndex == heapNodes-1)
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{
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// our tree and heap are going to collide
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#ifdef DEBUGGINGAIDS
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OSD_Printf("tilepacker: kdtree_reserveNode(): out of nodes\n");
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#endif
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return NULL;
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}
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nodes[nextTreeNodeIndex] = {(TreeNode*) pParent,
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(TreeNode*) pChild0,
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(TreeNode*) pChild1,
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rectangle,
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rectangle.width >= rectangle.height ? rectangle.width : rectangle.height,
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tileUID};
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--nextTreeNodeIndex;
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return nodes+nextTreeNodeIndex+1;
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}
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static char kdtree_add(uint32_t treeIndex, TreeNode *pNode)
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{
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TreeNode *pCurrentNode = nodes+NUM_NODES-treeIndex-1;
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while (true)
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{
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// is this node large enough to contain the currentNode?
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if (pCurrentNode->rect.width >= pNode->rect.width &&
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pCurrentNode->rect.height >= pNode->rect.height)
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{
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if (pCurrentNode->tileUID != (uint32_t) -1)
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{
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// if we're not a leaf node, continue to tunnel down until we reach a leaf on the 0-side of the tree
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pCurrentNode = pCurrentNode->pChild0;
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continue;
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}
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// otherwise, we have the node we want to split to insert our new node
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break;
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}
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// climb out until we find an unexplored 1-side branch to tunnel down
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TreeNode *lastNode;
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do
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{
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lastNode = pCurrentNode;
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pCurrentNode = pCurrentNode->pParent;
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if (pCurrentNode == NULL)
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{
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// we've fully explored the tree and asked for the root's parent
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return false;
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}
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} while (pCurrentNode->pChild1 == lastNode || !pCurrentNode->pChild1);
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pCurrentNode = pCurrentNode->pChild1;
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}
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// assign the empty leaf node the tileUID we want to add, then create children to split the node's remaining space
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pCurrentNode->tileUID = pNode->tileUID;
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tiles[pNode->tileUID].tilesheetID = treeIndex;
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tiles[pNode->tileUID].rect = {pCurrentNode->rect.u,
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pCurrentNode->rect.v,
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pNode->rect.width,
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pNode->rect.height};
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uint32_t rightSideWidth = pCurrentNode->rect.width - pNode->rect.width;
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uint32_t bottomSideHeight = pCurrentNode->rect.height - pNode->rect.height;
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TileRect rect0 = {pCurrentNode->rect.u+pNode->rect.width, pCurrentNode->rect.v, rightSideWidth, pCurrentNode->rect.height};
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TileRect rect1 = {pCurrentNode->rect.u, pCurrentNode->rect.v+pNode->rect.height, pNode->rect.width, bottomSideHeight};
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// decide which way to split
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if (rightSideWidth < bottomSideHeight)
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{
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//POGOTODO: instead of creating two new children and having the tree contain filled nodes
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// I should usurp the place of pCurrentNode with the largest child,
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// since the smaller child can always be contained within the larger one.
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// This requires an additional sort/bubbling step and always splitting width/height
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// based on level rather than max in order for the organization to work.
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// we'll have a more width-confined space to our right, so chop it off horizontally
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// rather than create a tall, potentially narrow empty area to have to fill later
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rect0 = {pCurrentNode->rect.u, pCurrentNode->rect.v+pNode->rect.height, pCurrentNode->rect.width, bottomSideHeight};
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rect1 = {pCurrentNode->rect.u+pNode->rect.width, pCurrentNode->rect.v, rightSideWidth, pNode->rect.height};
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}
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// it's important that the larger area become child0
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pCurrentNode->pChild0 = kdtree_reserveNode(pCurrentNode,
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NULL,
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NULL,
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rect0,
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-1);
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pCurrentNode->pChild1 = kdtree_reserveNode(pCurrentNode,
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NULL,
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NULL,
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rect1,
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-1);
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return true;
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}
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static char rejectQueue_add(TreeNode *pNode)
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{
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if (numRejected >= MAX_REJECTS)
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{
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return false;
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}
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rejectQueue[(rejectQueueHeadIndex+numRejected) % MAX_REJECTS] = *pNode;
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++numRejected;
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return true;
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}
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static TreeNode* rejectQueue_remove()
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{
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Bassert(numRejected);
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--numRejected;
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TreeNode* pNode = rejectQueue+rejectQueueHeadIndex;
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rejectQueueHeadIndex = (rejectQueueHeadIndex+1) % MAX_REJECTS;
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return pNode;
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}
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/*static void tilepacker_deleteTree()
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{
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//POGOTODO: this
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}*/
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void tilepacker_initTilesheet(uint32_t tilesheetID, uint32_t tilesheetWidth, uint32_t tilesheetHeight)
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{
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//POGOTODO: delete the tree if it's already been initialized
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nodes[NUM_NODES-tilesheetID-1] = {(TreeNode*) 0,
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(TreeNode*) 0,
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(TreeNode*) 0,
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{0, 0, tilesheetWidth, tilesheetHeight},
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tilesheetWidth >= tilesheetHeight ? tilesheetWidth : tilesheetHeight,
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(uint32_t) -1}; // use the maximum uint32_t to indicate this node is empty space
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}
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void tilepacker_addTile(uint32_t tileUID, uint32_t tileWidth, uint32_t tileHeight)
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{
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if (nextTreeNodeIndex < heapNodes)
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{
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// cannot reserve any more tiles!
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#ifdef DEBUGGINGAIDS
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OSD_Printf("tilepacker: tilepacker_addTile(): out of nodes\n");
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#endif
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return;
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}
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if (tileWidth == 0 ||
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tileHeight == 0)
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{
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// don't allow adding tiles with a width or height of 0
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return;
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}
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maxheap_reserveNode((TreeNode*) 0,
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(TreeNode*) 0,
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(TreeNode*) 0,
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{0, 0, tileWidth, tileHeight},
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tileUID);
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}
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char tilepacker_pack(uint32_t tilesheetID)
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{
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if (tilesheetID >= MAXTILESHEETS)
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{
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return false;
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}
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for (uint32_t numLeft = numRejected; numLeft > 0; --numLeft)
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{
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TreeNode *pNode = rejectQueue_remove();
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char success = kdtree_add(tilesheetID, pNode);
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if (!success)
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{
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rejectQueue_add(pNode);
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}
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}
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maxheap_buildHeap();
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for (TreeNode *pNode = maxheap_pop(); pNode != NULL; pNode = maxheap_pop())
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{
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char success = kdtree_add(tilesheetID, pNode);
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if (!success)
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{
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rejectQueue_add(pNode);
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}
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}
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return numRejected == 0;
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}
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void tilepacker_discardRejects()
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{
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numRejected = 0;
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}
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||||||
char tilepacker_getTile(uint32_t tileUID, Tile *pOutput)
|
|
||||||
{
|
|
||||||
if (tileUID >= MAXPACKEDTILES)
|
|
||||||
{
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
Tile tile = tiles[tileUID];
|
|
||||||
if (tile.rect.width == 0)
|
|
||||||
{
|
|
||||||
// that tileUID has not been packed or didn't fit
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (pOutput)
|
|
||||||
{
|
|
||||||
*pOutput = tile;
|
|
||||||
}
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
Loading…
Reference in a new issue