/indra/newview/llworldmipmap.h
https://bitbucket.org/lindenlab/viewer-beta/ · C++ Header · 94 lines · 29 code · 14 blank · 51 comment · 0 complexity · dc5d7b21e86ea25e967e243866c1ecb6 MD5 · raw file
- /**
- * @file llworldmipmap.h
- * @brief Data storage for the S3 mipmap of the entire world.
- *
- * $LicenseInfo:firstyear=2003&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
- #ifndef LL_LLWORLDMIPMAP_H
- #define LL_LLWORLDMIPMAP_H
- #include <map>
- #include "llmemory.h" // LLPointer
- #include "indra_constants.h" // REGION_WIDTH_UNITS
- #include "llregionhandle.h" // to_region_handle()
- class LLViewerFetchedTexture;
- // LLWorldMipmap : Mipmap handling of all the tiles used to render the world at any resolution.
- // This class provides a clean structured access to the hierarchy of tiles stored in the
- // Amazon S3 repository and abstracts its directory/file structure.
- // The interface of this class though still assumes that the caller knows the general level/tiles
- // structure (at least, that it exists...) but doesn't requite the caller to know the details of it.
- // IOW, you need to know that rendering levels exists as well as grid coordinates for regions,
- // but you can ignore where those tiles are located, how to get them, etc...
- // The class API gives you back LLPointer<LLViewerFetchedTexture> per tile.
- // See llworldmipmapview.cpp for the implementation of a class who knows how to render an LLWorldMipmap.
- // Implementation notes:
- // - On the S3 servers, the tiles are rendered in 2 flavors: Objects and Terrain.
- // - For the moment, LLWorldMipmap implements access only to the Objects tiles.
- class LLWorldMipmap
- {
- public:
- // Parameters of the mipmap
- static const S32 MAP_LEVELS = 8; // Number of subresolution levels computed by the mapserver
- static const S32 MAP_TILE_SIZE = 256; // Width in pixels of the tiles computed by the mapserver
- LLWorldMipmap();
- ~LLWorldMipmap();
- // Clear up the maps and release all image handles
- void reset();
- // Manage the boost levels between loops (typically draw() loops)
- void equalizeBoostLevels();
- // Drop the boost levels to none (used when hiding the map)
- void dropBoostLevels();
- // Get the tile smart pointer, does the loading if necessary
- LLPointer<LLViewerFetchedTexture> getObjectsTile(U32 grid_x, U32 grid_y, S32 level, bool load = true);
- // Helper functions: those are here as they depend solely on the topology of the mipmap though they don't access it
- // Convert sim scale (given in sim width in display pixels) into a mipmap level
- static S32 scaleToLevel(F32 scale);
- // Convert world coordinates to mipmap grid coordinates at a given level
- static void globalToMipmap(F64 global_x, F64 global_y, S32 level, U32* grid_x, U32* grid_y);
- private:
- // Get a handle (key) from grid coordinates
- U64 convertGridToHandle(U32 grid_x, U32 grid_y) { return to_region_handle(grid_x * REGION_WIDTH_UNITS, grid_y * REGION_WIDTH_UNITS); }
- // Load the relevant tile from S3
- LLPointer<LLViewerFetchedTexture> loadObjectsTile(U32 grid_x, U32 grid_y, S32 level);
- // Clear a level from its "missing" tiles
- void cleanMissedTilesFromLevel(S32 level);
- // The mipmap is organized by resolution level (MAP_LEVELS of them). Each resolution level is an std::map
- // using a region_handle as a key and storing a smart pointer to the image as a value.
- typedef std::map<U64, LLPointer<LLViewerFetchedTexture> > sublevel_tiles_t;
- sublevel_tiles_t mWorldObjectsMipMap[MAP_LEVELS];
- // sublevel_tiles_t mWorldTerrainMipMap[MAP_LEVELS];
- S32 mCurrentLevel; // The level last accessed by a getObjectsTile()
- };
- #endif // LL_LLWORLDMIPMAP_H