////  TextureCache.cpp//  interface/src/renderer////  Created by Andrzej Kapolka on 8/6/13.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// // include this before QGLWidget, which includes an earlier version of OpenGL#include "InterfaceConfig.h" #include <QGLWidget>#include <QNetworkReply>#include <QOpenGLFramebufferObject>#include <QRunnable>#include <QThreadPool> #include <glm/glm.hpp>#include <glm/gtc/random.hpp> #include "Application.h"#include "TextureCache.h" TextureCache::TextureCache() :    _permutationNormalTextureID(0),    _whiteTextureID(0),    _blueTextureID(0),    _primaryDepthTextureID(0),    _primaryNormalTextureID(0),    _primarySpecularTextureID(0),    _primaryFramebufferObject(NULL),    _secondaryFramebufferObject(NULL),    _tertiaryFramebufferObject(NULL),    _shadowFramebufferObject(NULL),    _frameBufferSize(100, 100){} TextureCache::~TextureCache() {    if (_permutationNormalTextureID != 0) {        glDeleteTextures(1, &_permutationNormalTextureID);    }    if (_whiteTextureID != 0) {        glDeleteTextures(1, &_whiteTextureID);    }    if (_primaryFramebufferObject) {        glDeleteTextures(1, &_primaryDepthTextureID);        glDeleteTextures(1, &_primaryNormalTextureID);        glDeleteTextures(1, &_primarySpecularTextureID);    }        if (_primaryFramebufferObject) {        delete _primaryFramebufferObject;    }     if (_secondaryFramebufferObject) {        delete _secondaryFramebufferObject;    }     if (_tertiaryFramebufferObject) {        delete _tertiaryFramebufferObject;    }} void TextureCache::setFrameBufferSize(QSize frameBufferSize) {    //If the size changed, we need to delete our FBOs    if (_frameBufferSize != frameBufferSize) {        _frameBufferSize = frameBufferSize;         if (_primaryFramebufferObject) {            delete _primaryFramebufferObject;            _primaryFramebufferObject = NULL;            glDeleteTextures(1, &_primaryDepthTextureID);            _primaryDepthTextureID = 0;            glDeleteTextures(1, &_primaryNormalTextureID);            _primaryNormalTextureID = 0;            glDeleteTextures(1, &_primarySpecularTextureID);            _primarySpecularTextureID = 0;        }         if (_secondaryFramebufferObject) {            delete _secondaryFramebufferObject;            _secondaryFramebufferObject = NULL;        }         if (_tertiaryFramebufferObject) {            delete _tertiaryFramebufferObject;            _tertiaryFramebufferObject = NULL;        }    }} // use fixed table of permutations. Could also make ordered list programmatically// and then shuffle algorithm. For testing, this ensures consistent behavior in each run.// this list taken from Ken Perlin's Improved Noise reference implementation (orig. in Java) at// http://mrl.nyu.edu/~perlin/noise/ const int permutation[256] = {    151, 160, 137,  91,  90,  15, 131,  13, 201,  95,  96,  53, 194, 233,   7, 225,    140,  36, 103,  30,  69, 142,   8,  99,  37, 240,  21,  10,  23, 190,   6, 148,    247, 120, 234,  75,   0,  26, 197,  62,  94, 252, 219, 203, 117,  35,  11,  32,     57, 177,  33,  88, 237, 149,  56,  87, 174,  20, 125, 136, 171, 168,  68, 175,     74, 165,  71, 134, 139,  48,  27, 166,  77, 146, 158, 231,  83, 111, 229, 122,     60, 211, 133, 230, 220, 105,  92,  41,  55,  46, 245,  40, 244, 102, 143,  54,     65,  25,  63, 161,   1, 216,  80,  73, 209,  76, 132, 187, 208,  89,  18, 169,     200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186,   3,  64,     52, 217, 226, 250, 124, 123,   5, 202,  38, 147, 118, 126, 255,  82,  85, 212,    207, 206,  59, 227,  47,  16,  58,  17, 182, 189,  28,  42, 223, 183, 170, 213,    119, 248, 152,   2,  44, 154, 163,  70, 221, 153, 101, 155, 167,  43, 172,   9,    129,  22,  39, 253,  19,  98, 108, 110,  79, 113, 224, 232, 178, 185, 112, 104,    218, 246,  97, 228, 251,  34, 242, 193, 238, 210, 144,  12, 191, 179, 162, 241,     81,  51, 145, 235, 249,  14, 239, 107,  49, 192, 214,  31, 181, 199, 106, 157,    184,  84, 204, 176, 115, 121,  50,  45, 127,   4, 150, 254, 138, 236, 205,  93,    222, 114,  67,  29,  24,  72, 243, 141, 128, 195,  78,  66, 215,  61, 156, 180}; #define USE_CHRIS_NOISE 1 GLuint TextureCache::getPermutationNormalTextureID() {    if (_permutationNormalTextureID == 0) {        glGenTextures(1, &_permutationNormalTextureID);        glBindTexture(GL_TEXTURE_2D, _permutationNormalTextureID);                // the first line consists of random permutation offsets        unsigned char data[256 * 2 * 3];#if (USE_CHRIS_NOISE==1)        for (int i = 0; i < 256; i++) {            data[3*i+0] = permutation[i];            data[3*i+1] = permutation[i];            data[3*i+2] = permutation[i];#else        for (int i = 0; i < 256 * 3; i++) {            data[i] = rand() % 256;#endif        }         for (int i = 256 * 3; i < 256 * 3 * 2; i += 3) {            glm::vec3 randvec = glm::sphericalRand(1.0f);            data[i] = ((randvec.x + 1.0f) / 2.0f) * 255.0f;            data[i + 1] = ((randvec.y + 1.0f) / 2.0f) * 255.0f;            data[i + 2] = ((randvec.z + 1.0f) / 2.0f) * 255.0f;        }        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 256, 2, 0, GL_RGB, GL_UNSIGNED_BYTE, data);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);        glBindTexture(GL_TEXTURE_2D, 0);    }    return _permutationNormalTextureID;} const unsigned char OPAQUE_WHITE[] = { 0xFF, 0xFF, 0xFF, 0xFF };const unsigned char TRANSPARENT_WHITE[] = { 0xFF, 0xFF, 0xFF, 0x0 };const unsigned char OPAQUE_BLACK[] = { 0x0, 0x0, 0x0, 0xFF };const unsigned char OPAQUE_BLUE[] = { 0x80, 0x80, 0xFF, 0xFF }; static void loadSingleColorTexture(const unsigned char* color) {    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, color);    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);} GLuint TextureCache::getWhiteTextureID() {    if (_whiteTextureID == 0) {        glGenTextures(1, &_whiteTextureID);        glBindTexture(GL_TEXTURE_2D, _whiteTextureID);        loadSingleColorTexture(OPAQUE_WHITE);        glBindTexture(GL_TEXTURE_2D, 0);    }    return _whiteTextureID;} GLuint TextureCache::getBlueTextureID() {    if (_blueTextureID == 0) {        glGenTextures(1, &_blueTextureID);        glBindTexture(GL_TEXTURE_2D, _blueTextureID);        loadSingleColorTexture(OPAQUE_BLUE);        glBindTexture(GL_TEXTURE_2D, 0);    }    return _blueTextureID;} /// Extra data for creating textures.class TextureExtra {public:    TextureType type;    const QByteArray& content;}; NetworkTexturePointer TextureCache::getTexture(const QUrl& url, TextureType type, bool dilatable, const QByteArray& content) {    if (!dilatable) {        TextureExtra extra = { type, content };        return ResourceCache::getResource(url, QUrl(), false, &extra).staticCast<NetworkTexture>();    }    NetworkTexturePointer texture = _dilatableNetworkTextures.value(url);    if (texture.isNull()) {        texture = NetworkTexturePointer(new DilatableNetworkTexture(url, content), &Resource::allReferencesCleared);        texture->setSelf(texture);        texture->setCache(this);        _dilatableNetworkTextures.insert(url, texture);    } else {        _unusedResources.remove(texture->getLRUKey());    }    return texture;} QOpenGLFramebufferObject* TextureCache::getPrimaryFramebufferObject() {     if (!_primaryFramebufferObject) {        _primaryFramebufferObject = createFramebufferObject();         glGenTextures(1, &_primaryDepthTextureID);        glBindTexture(GL_TEXTURE_2D, _primaryDepthTextureID);        glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, _frameBufferSize.width(), _frameBufferSize.height(),            0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);                glGenTextures(1, &_primaryNormalTextureID);        glBindTexture(GL_TEXTURE_2D, _primaryNormalTextureID);        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _frameBufferSize.width(), _frameBufferSize.height(),            0, GL_RGBA, GL_UNSIGNED_BYTE, 0);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);        glBindTexture(GL_TEXTURE_2D, 0);                glGenTextures(1, &_primarySpecularTextureID);        glBindTexture(GL_TEXTURE_2D, _primarySpecularTextureID);        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _frameBufferSize.width(), _frameBufferSize.height(),            0, GL_RGBA, GL_UNSIGNED_BYTE, 0);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);        glBindTexture(GL_TEXTURE_2D, 0);                _primaryFramebufferObject->bind();        glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, _primaryDepthTextureID, 0);        glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, _primaryNormalTextureID, 0);        glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, _primarySpecularTextureID, 0);        _primaryFramebufferObject->release();    }    return _primaryFramebufferObject;} GLuint TextureCache::getPrimaryDepthTextureID() {    // ensure that the primary framebuffer object is initialized before returning the depth texture id    getPrimaryFramebufferObject();    return _primaryDepthTextureID;} GLuint TextureCache::getPrimaryNormalTextureID() {    // ensure that the primary framebuffer object is initialized before returning the normal texture id    getPrimaryFramebufferObject();    return _primaryNormalTextureID;} GLuint TextureCache::getPrimarySpecularTextureID() {    getPrimaryFramebufferObject();    return _primarySpecularTextureID;} void TextureCache::setPrimaryDrawBuffers(bool color, bool normal, bool specular) {    GLenum buffers[3];    int bufferCount = 0;    if (color) {        buffers[bufferCount++] = GL_COLOR_ATTACHMENT0;    }    if (normal) {        buffers[bufferCount++] = GL_COLOR_ATTACHMENT1;    }    if (specular) {        buffers[bufferCount++] = GL_COLOR_ATTACHMENT2;    }    glDrawBuffers(bufferCount, buffers);} QOpenGLFramebufferObject* TextureCache::getSecondaryFramebufferObject() {    if (!_secondaryFramebufferObject) {        _secondaryFramebufferObject = createFramebufferObject();    }    return _secondaryFramebufferObject;} QOpenGLFramebufferObject* TextureCache::getTertiaryFramebufferObject() {    if (!_tertiaryFramebufferObject) {        _tertiaryFramebufferObject = createFramebufferObject();    }    return _tertiaryFramebufferObject;} QOpenGLFramebufferObject* TextureCache::getShadowFramebufferObject() {    if (!_shadowFramebufferObject) {        const int SHADOW_MAP_SIZE = 2048;        _shadowFramebufferObject = new QOpenGLFramebufferObject(SHADOW_MAP_SIZE, SHADOW_MAP_SIZE,            QOpenGLFramebufferObject::NoAttachment, GL_TEXTURE_2D, GL_RGB);                glGenTextures(1, &_shadowDepthTextureID);        glBindTexture(GL_TEXTURE_2D, _shadowDepthTextureID);        glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, SHADOW_MAP_SIZE, SHADOW_MAP_SIZE,            0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);        const float DISTANT_BORDER[] = { 1.0f, 1.0f, 1.0f, 1.0f };        glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, DISTANT_BORDER);        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);        glBindTexture(GL_TEXTURE_2D, 0);                _shadowFramebufferObject->bind();        glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, _shadowDepthTextureID, 0);        _shadowFramebufferObject->release();    }    return _shadowFramebufferObject;} GLuint TextureCache::getShadowDepthTextureID() {    // ensure that the shadow framebuffer object is initialized before returning the depth texture id    getShadowFramebufferObject();    return _shadowDepthTextureID;} bool TextureCache::eventFilter(QObject* watched, QEvent* event) {    if (event->type() == QEvent::Resize) {        QSize size = static_cast<QResizeEvent*>(event)->size();        if (_primaryFramebufferObject && _primaryFramebufferObject->size() != size) {            delete _primaryFramebufferObject;            _primaryFramebufferObject = NULL;            glDeleteTextures(1, &_primaryDepthTextureID);            glDeleteTextures(1, &_primaryNormalTextureID);            glDeleteTextures(1, &_primarySpecularTextureID);        }        if (_secondaryFramebufferObject && _secondaryFramebufferObject->size() != size) {            delete _secondaryFramebufferObject;            _secondaryFramebufferObject = NULL;        }        if (_tertiaryFramebufferObject && _tertiaryFramebufferObject->size() != size) {            delete _tertiaryFramebufferObject;            _tertiaryFramebufferObject = NULL;        }    }    return false;} QSharedPointer<Resource> TextureCache::createResource(const QUrl& url,        const QSharedPointer<Resource>& fallback, bool delayLoad, const void* extra) {    const TextureExtra* textureExtra = static_cast<const TextureExtra*>(extra);    return QSharedPointer<Resource>(new NetworkTexture(url, textureExtra->type, textureExtra->content),        &Resource::allReferencesCleared);} QOpenGLFramebufferObject* TextureCache::createFramebufferObject() {    QOpenGLFramebufferObject* fbo = new QOpenGLFramebufferObject(_frameBufferSize);    Application::getInstance()->getGLWidget()->installEventFilter(this);        glBindTexture(GL_TEXTURE_2D, fbo->texture());    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);    glBindTexture(GL_TEXTURE_2D, 0);        return fbo;} Texture::Texture() {    glGenTextures(1, &_id);} Texture::~Texture() {    glDeleteTextures(1, &_id);} NetworkTexture::NetworkTexture(const QUrl& url, TextureType type, const QByteArray& content) :    Resource(url, !content.isEmpty()),    _type(type),    _translucent(false) {        if (!url.isValid()) {        _loaded = true;    }        // default to white/blue/black    glBindTexture(GL_TEXTURE_2D, getID());    switch (type) {        case NORMAL_TEXTURE:            loadSingleColorTexture(OPAQUE_BLUE);              break;                case SPECULAR_TEXTURE:            loadSingleColorTexture(OPAQUE_BLACK);              break;                    case SPLAT_TEXTURE:            loadSingleColorTexture(TRANSPARENT_WHITE);               break;                    default:            loadSingleColorTexture(OPAQUE_WHITE);                    break;    }    glBindTexture(GL_TEXTURE_2D, 0);        // if we have content, load it after we have our self pointer    if (!content.isEmpty()) {        _startedLoading = true;        QMetaObject::invokeMethod(this, "loadContent", Qt::QueuedConnection, Q_ARG(const QByteArray&, content));    }} class ImageReader : public QRunnable {public:     ImageReader(const QWeakPointer<Resource>& texture, QNetworkReply* reply, const QUrl& url = QUrl(),        const QByteArray& content = QByteArray());        virtual void run(); private:        QWeakPointer<Resource> _texture;    QNetworkReply* _reply;    QUrl _url;    QByteArray _content;}; ImageReader::ImageReader(const QWeakPointer<Resource>& texture, QNetworkReply* reply,        const QUrl& url, const QByteArray& content) :    _texture(texture),    _reply(reply),    _url(url),    _content(content) {} void ImageReader::run() {    QSharedPointer<Resource> texture = _texture.toStrongRef();    if (texture.isNull()) {        if (_reply) {            _reply->deleteLater();        }        return;    }    if (_reply) {        _url = _reply->url();        _content = _reply->readAll();        _reply->deleteLater();    }    QImage image = QImage::fromData(_content);        // enforce a fixed maximum    const int MAXIMUM_SIZE = 1024;    if (image.width() > MAXIMUM_SIZE || image.height() > MAXIMUM_SIZE) {        qDebug() << "Image greater than maximum size:" << _url << image.width() << image.height();        image = image.scaled(MAXIMUM_SIZE, MAXIMUM_SIZE, Qt::KeepAspectRatio);    }    int imageArea = image.width() * image.height();        const int EIGHT_BIT_MAXIMUM = 255;    if (!image.hasAlphaChannel()) {        if (image.format() != QImage::Format_RGB888) {            image = image.convertToFormat(QImage::Format_RGB888);        }        int redTotal = 0, greenTotal = 0, blueTotal = 0;        for (int y = 0; y < image.height(); y++) {            for (int x = 0; x < image.width(); x++) {                QRgb rgb = image.pixel(x, y);                redTotal += qRed(rgb);                greenTotal += qGreen(rgb);                blueTotal += qBlue(rgb);            }        }        QColor averageColor(EIGHT_BIT_MAXIMUM, EIGHT_BIT_MAXIMUM, EIGHT_BIT_MAXIMUM);        if (imageArea > 0) {            averageColor.setRgb(redTotal / imageArea, greenTotal / imageArea, blueTotal / imageArea);        }        QMetaObject::invokeMethod(texture.data(), "setImage", Q_ARG(const QImage&, image), Q_ARG(bool, false),            Q_ARG(const QColor&, averageColor));        return;    }    if (image.format() != QImage::Format_ARGB32) {        image = image.convertToFormat(QImage::Format_ARGB32);    }        // check for translucency/false transparency    int opaquePixels = 0;    int translucentPixels = 0;    int redTotal = 0, greenTotal = 0, blueTotal = 0, alphaTotal = 0;    for (int y = 0; y < image.height(); y++) {        for (int x = 0; x < image.width(); x++) {            QRgb rgb = image.pixel(x, y);            redTotal += qRed(rgb);            greenTotal += qGreen(rgb);            blueTotal += qBlue(rgb);            int alpha = qAlpha(rgb);            alphaTotal += alpha;            if (alpha == EIGHT_BIT_MAXIMUM) {                opaquePixels++;            } else if (alpha != 0) {                translucentPixels++;            }        }

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