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* Copyright (C) 2006 Fabien Chereau
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#ifndef _STEXTURE_HPP_
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#define _STEXTURE_HPP_
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#include "STextureTypes.hpp"
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//! Base texture class
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class STexture : public QObject
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friend class StelTextureMgr;
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friend class ImageLoadThread;
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//! Bind the texture so that it can be used for openGL drawing (calls glBindTexture).
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//! If the texture is lazyly loaded, this starts the loading and return false immediately.
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//! @return true if the binding successfully occured, false if the texture is not yet loaded.
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//! Return whether the texture can be binded, i.e. it is fully loaded
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bool canBind() const {return id!=0;}
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//! Get the average texture luminance.
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//! @param lum 0 is black, 1 is white
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//! @return true if the returned luminance is known, false if not. In this later case, the value of num is undefined.
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bool getAverageLuminance(float& lum);
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//! Return the width and heigth of the texture in pixels
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bool getDimensions(int &width, int &height);
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//! Return the position of the 4 corners of the texture in texture coordinates
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const Vec2d* getCoordinates() const {return texCoordinates;}
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//! Get the error message which caused the texture loading to fail
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//! @return the human friendly error message or empty string if no errors occured
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const QString& getErrorMessage() const {return errorMessage;}
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//! Return the full path to the image file
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const QString& getFullPath() const {return fullPath;}
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//! Return whether the image is currently being loaded
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bool isLoading() const {return isLoadingImage && !canBind();}
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//! Emitted when the texture is ready to be bind(), i.e. when downloaded, imageLoading and glLoading is over
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//! or when an error occured and the texture will never be available
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//! In case of error, you can query what the problem was by calling getErrorMessage()
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//! @param error is equal to true if an error occured while loading the texture
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void loadingProcessFinished(bool error);
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//! Called when the download for the texture file terminated
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void downloadFinished();
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//! Called when the file loading thread has terminated
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void fileLoadFinished();
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//! Private constructor
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//! Load the texture already in the RAM to the openGL memory
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//! This function uses openGL routines and must be called in the main thread
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//! @return false if an error occured
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//! Loading of the image data.
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//! This method is thread safe
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//! @return false if an error occured
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//! This method should be called if the texture loading failed for any reasons
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//! @param errorMessage the human friendly error message
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void reportError(const QString& errorMessage);
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//! Define the range mode used to rescale the texture when loading
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STextureTypes::DynamicRangeMode dynamicRangeMode;
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//! Used to download remote files if needed
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class QNetworkReply* httpReply;
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//! Used to load in thread
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class ImageLoadThread* loadThread;
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//! Define if the texture was already downloaded if it was a remote one
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//! Define whether the image is already loading
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//! The URL where to download the file
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//! The data that was laoded from http
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QByteArray downloadedData;
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//! Used ony when creating temporary file
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QString fileExtension;
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//! True when something when wrong in the loading process
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//! Human friendly error message if loading failed
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QString errorMessage;
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///////////////////////////////////////////////////////////////////////////
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// Attributes protected by the Mutex
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//! Mutex used to protect all the attributes below
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//! Cached average luminance
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GLsizei width; //! Texture image width
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GLsizei height; //! Texture image height
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GLint internalFormat;
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//! Position of the 4 corners of the texture in texture coordinates
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Vec2d texCoordinates[4];
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//! Fix a limit to the number of maximum simultaneous loading threads
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static QSemaphore* maxLoadThreadSemaphore;
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#endif // _STEXTURE_HPP_
added
removed
src/core/STexture.hpp
