2016-04-14 19:51:50 +12:00
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#include <memory>
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2016-03-19 06:57:51 +13:00
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// TnzCore includes
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#include "tgl.h"
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// TnzExt includes
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#include "ext/meshtexturizer.h"
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// tcg includes
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#include "tcg/tcg_list.h"
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// Qt includes
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#include <QString>
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#include <QCache>
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#include <QMutex>
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#include <QMutexLocker>
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#include "ext/ttexturesstorage.h"
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//***************************************************************************************
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// Local namespace - structures
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//***************************************************************************************
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struct TexturesContainer {
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MeshTexturizer
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m_texturizer; //!< The mesh texturizer - actual textures container
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tcg::list<QString> m_keys; //!< Keys in the storage
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public:
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TexturesContainer() {}
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private:
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TexturesContainer(const TexturesContainer &);
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TexturesContainer &operator=(const TexturesContainer &);
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};
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//***************************************************************************************
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// Local namespace - variables
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//***************************************************************************************
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namespace {
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QMutex l_mutex(QMutex::Recursive); // A mutex is needed to synchronize access
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// to the following objects
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std::map<int, TexturesContainer *>
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l_texturesContainers; // Texture Containers by display lists space id
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QCache<QString, DrawableTextureDataP> l_objects(500 * 1024); // 500 MB cache
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// for now - NOTE:
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// MUST be
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// allocated
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// before the
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// following
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2016-06-15 18:43:10 +12:00
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} // namespace
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//***************************************************************************************
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// Local namespace - global functions
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//***************************************************************************************
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namespace {
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inline QString textureString(int dlSpaceId, const std::string &texId) {
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return QString::number(dlSpaceId) + "_" + QString::fromStdString(texId);
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}
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//-------------------------------------------------------------------------------------
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inline void deleteTexturesContainer(
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const std::pair<int, TexturesContainer *> &pair) {
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delete pair.second;
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}
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}
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//***************************************************************************************
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// DrawableTextureData implementation
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//***************************************************************************************
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DrawableTextureData::~DrawableTextureData() {
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QMutexLocker locker(&l_mutex);
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TexturesContainer *texContainer = l_texturesContainers[m_dlSpaceId];
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if (m_dlSpaceId >= 0) {
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// Load the container's display lists space (remember current OpenGL
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// context, too)
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TGLDisplayListsProxy *proxy =
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TGLDisplayListsManager::instance()->dlProxy(m_dlSpaceId);
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TGlContext currentContext = tglGetCurrentContext();
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// Unbind the textures
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{
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QMutexLocker locker(proxy->mutex());
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proxy->makeCurrent();
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texContainer->m_texturizer.unbindTexture(m_texId);
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}
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// Restore OpenGL context - equivalent to tglDoneCurrent if currentContext
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// == TGlContext()
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tglMakeCurrent(currentContext);
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} else
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// Temporary - use current OpenGL context directly
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texContainer->m_texturizer.unbindTexture(m_texId);
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texContainer->m_keys.erase(m_objIdx);
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}
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//***************************************************************************************
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// TTexturesStorage implementation
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//***************************************************************************************
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TTexturesStorage::TTexturesStorage() {
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// This singleton is dependent on TGLDisplayListsManager
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TGLDisplayListsManager::instance()->addObserver(this);
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}
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//-------------------------------------------------------------------------------------
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TTexturesStorage::~TTexturesStorage() {
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l_objects.clear();
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std::for_each(l_texturesContainers.begin(), l_texturesContainers.end(),
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deleteTexturesContainer);
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}
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//-------------------------------------------------------------------------------------
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TTexturesStorage *TTexturesStorage::instance() {
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static TTexturesStorage theInstance;
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return &theInstance;
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}
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//-------------------------------------------------------------------------------------
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DrawableTextureDataP TTexturesStorage::loadTexture(const std::string &textureId,
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const TRaster32P &ras,
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const TRectD &geometry) {
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// Try to retrieve the proxy associated to current OpenGL context
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TGlContext currentContext = tglGetCurrentContext();
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int dlSpaceId =
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TGLDisplayListsManager::instance()->displayListsSpaceId(currentContext);
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QString texString(::textureString(dlSpaceId, textureId));
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// Deal with containers
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QMutexLocker locker(&l_mutex);
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// If necessary, allocate a textures container
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std::map<int, TexturesContainer *>::iterator it =
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l_texturesContainers.find(dlSpaceId);
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if (it == l_texturesContainers.end())
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it = l_texturesContainers
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.insert(std::make_pair(dlSpaceId, new TexturesContainer))
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.first;
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MeshTexturizer &texturizer = it->second->m_texturizer;
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DrawableTextureDataP dataPtr = std::make_shared<DrawableTextureData>();
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DrawableTextureData *data = dataPtr.get();
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data->m_dlSpaceId = dlSpaceId;
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data->m_texId = texturizer.bindTexture(ras, geometry);
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data->m_objIdx = it->second->m_keys.push_back(texString);
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data->m_textureData = texturizer.getTextureData(data->m_texId);
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l_objects.insert(texString, new DrawableTextureDataP(dataPtr),
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(ras->getLx() * ras->getLy() * ras->getPixelSize()) >> 10);
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if (dlSpaceId < 0) {
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// obj is a temporary. It was pushed in the cache to make space for it -
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// however, it must not be
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// stored. Remove it now.
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l_objects.remove(texString);
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}
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return dataPtr;
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}
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//-------------------------------------------------------------------------------------
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2016-06-15 18:43:10 +12:00
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void TTexturesStorage::unloadTexture(const std::string &textureId) {
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QMutexLocker locker(&l_mutex);
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// Remove the specified texture from ALL the display lists spaces
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std::map<int, TexturesContainer *>::iterator it,
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iEnd(l_texturesContainers.end());
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for (it = l_texturesContainers.begin(); it != iEnd; ++it)
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l_objects.remove(::textureString(it->first, textureId));
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}
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//-----------------------------------------------------------------------------------
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void TTexturesStorage::onDisplayListDestroyed(int dlSpaceId) {
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QMutexLocker locker(&l_mutex);
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// Remove the textures container associated with dlSpaceId
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std::map<int, TexturesContainer *>::iterator it =
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l_texturesContainers.find(dlSpaceId);
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if (it == l_texturesContainers.end()) return;
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tcg::list<QString>::iterator st, sEnd(it->second->m_keys.end());
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for (st = it->second->m_keys.begin(); st != sEnd;) // Note that the increment
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// is performed BEFORE the
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// texture is removed.
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l_objects.remove(*st++); // This is because texture removal may destroy the
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// key being addressed,
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// whose iterator would then be invalidated.
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delete it->second;
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l_texturesContainers.erase(it);
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}
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//-------------------------------------------------------------------------------------
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DrawableTextureDataP TTexturesStorage::getTextureData(
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const std::string &textureId) {
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// Get current display lists space
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TGlContext currentContext = tglGetCurrentContext();
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int dlSpaceId =
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TGLDisplayListsManager::instance()->displayListsSpaceId(currentContext);
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// If there is no known associated display lists space, the texture cannot be
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// stored.
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// if (dlSpaceId < 0) return DrawableTextureDataP();
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// If from an offline display, let's see if found under display 0
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if (dlSpaceId < 0) dlSpaceId = 0;
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QMutexLocker locker(&l_mutex);
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// Search the texture object
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QString texString(::textureString(dlSpaceId, textureId));
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if (!l_objects.contains(texString)) return DrawableTextureDataP();
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return *l_objects.object(texString);
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}
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