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Diffstat (limited to 'src/plugins/renderers/opengl/textures/gltexture.cpp')
| -rw-r--r-- | src/plugins/renderers/opengl/textures/gltexture.cpp | 774 |
1 files changed, 774 insertions, 0 deletions
diff --git a/src/plugins/renderers/opengl/textures/gltexture.cpp b/src/plugins/renderers/opengl/textures/gltexture.cpp new file mode 100644 index 000000000..11b43e085 --- /dev/null +++ b/src/plugins/renderers/opengl/textures/gltexture.cpp @@ -0,0 +1,774 @@ +/**************************************************************************** +** +** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB). +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the Qt3D module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore/qhash.h> +#include "gltexture_p.h" + +#include <private/qdebug_p.h> +#include <private/qopengltexture_p.h> +#include <private/qopengltexturehelper_p.h> +#include <QDebug> +#include <QOpenGLFunctions> +#include <QOpenGLTexture> +#include <QOpenGLPixelTransferOptions> +#include <Qt3DRender/qtexture.h> +#include <Qt3DRender/qtexturedata.h> +#include <Qt3DRender/qtextureimagedata.h> +#include <Qt3DRender/private/managers_p.h> +#include <Qt3DRender/private/qabstracttexture_p.h> +#include <Qt3DRender/private/qtextureimagedata_p.h> +#include <renderbuffer_p.h> + +#if !defined(QT_OPENGL_ES_2) +#include <QOpenGLFunctions_3_1> +#include <QOpenGLFunctions_4_5_Core> +#endif + +QT_BEGIN_NAMESPACE + +using namespace Qt3DCore; + +namespace Qt3DRender { +namespace Render { +namespace OpenGL { + +namespace { + +// This uploadGLData where the data is a fullsize subimage +// as QOpenGLTexture doesn't allow partial subimage uploads +void uploadGLData(QOpenGLTexture *glTex, + int level, int layer, QOpenGLTexture::CubeMapFace face, + const QByteArray &bytes, const QTextureImageDataPtr &data) +{ + if (data->isCompressed()) { + glTex->setCompressedData(level, layer, face, bytes.size(), bytes.constData()); + } else { + QOpenGLPixelTransferOptions uploadOptions; + uploadOptions.setAlignment(1); + glTex->setData(level, layer, face, data->pixelFormat(), data->pixelType(), bytes.constData(), &uploadOptions); + } +} + +// For partial sub image uploads +void uploadGLData(QOpenGLTexture *glTex, + int mipLevel, int layer, QOpenGLTexture::CubeMapFace cubeFace, + int xOffset, int yOffset, int zOffset, + const QByteArray &bytes, const QTextureImageDataPtr &data) +{ + if (data->isCompressed()) { + qWarning() << Q_FUNC_INFO << "Uploading non full sized Compressed Data not supported yet"; + } else { + QOpenGLPixelTransferOptions uploadOptions; + uploadOptions.setAlignment(1); + glTex->setData(xOffset, yOffset, zOffset, + data->width(), data->height(), data->depth(), + mipLevel, layer, cubeFace, data->layers(), + data->pixelFormat(), data->pixelType(), + bytes.constData(), &uploadOptions); + } +} + +} // anonymous + + +GLTexture::GLTexture() + : m_dirtyFlags(None) + , m_gl(nullptr) + , m_renderBuffer(nullptr) + , m_dataFunctor() + , m_pendingDataFunctor(nullptr) + , m_sharedTextureId(-1) + , m_externalRendering(false) + , m_wasTextureRecreated(false) +{ +} + +GLTexture::~GLTexture() +{ +} + +// Must be called from RenderThread with active GL context +void GLTexture::destroy() +{ + delete m_gl; + m_gl = nullptr; + delete m_renderBuffer; + m_renderBuffer = nullptr; + + m_dirtyFlags = None; + m_sharedTextureId = -1; + m_externalRendering = false; + m_wasTextureRecreated = false; + m_dataFunctor.reset(); + m_pendingDataFunctor = nullptr; + + m_properties = {}; + m_parameters = {}; + m_textureData.reset(); + m_images.clear(); + m_imageData.clear(); + m_pendingTextureDataUpdates.clear(); +} + +bool GLTexture::loadTextureDataFromGenerator() +{ + m_textureData = m_dataFunctor->operator()(); + // if there is a texture generator, most properties will be defined by it + if (m_textureData) { + const QAbstractTexture::Target target = m_textureData->target(); + + // If both target and functor return Automatic we are still + // probably loading the texture, return false + if (m_properties.target == QAbstractTexture::TargetAutomatic && + target == QAbstractTexture::TargetAutomatic) { + m_textureData.reset(); + return false; + } + + if (m_properties.target != QAbstractTexture::TargetAutomatic && + target != QAbstractTexture::TargetAutomatic && + m_properties.target != target) { + qWarning() << Q_FUNC_INFO << "Generator and Properties not requesting the same texture target"; + m_textureData.reset(); + return false; + } + + // We take target type from generator if it wasn't explicitly set by the user + if (m_properties.target == QAbstractTexture::TargetAutomatic) + m_properties.target = target; + m_properties.width = m_textureData->width(); + m_properties.height = m_textureData->height(); + m_properties.depth = m_textureData->depth(); + m_properties.layers = m_textureData->layers(); + m_properties.format = m_textureData->format(); + + const QVector<QTextureImageDataPtr> imageData = m_textureData->imageData(); + + if (imageData.size() > 0) { + // Set the mips level based on the first image if autoMipMapGeneration is disabled + if (!m_properties.generateMipMaps) + m_properties.mipLevels = imageData.first()->mipLevels(); + } + } + return !m_textureData.isNull(); +} + +void GLTexture::loadTextureDataFromImages() +{ + int maxMipLevel = 0; + for (const Image &img : qAsConst(m_images)) { + const QTextureImageDataPtr imgData = img.generator->operator()(); + // imgData may be null in the following cases: + // - Texture is created with TextureImages which have yet to be + // loaded (skybox where you don't yet know the path, source set by + // a property binding, queued connection ...) + // - TextureImage whose generator failed to return a valid data + // (invalid url, error opening file...) + if (imgData.isNull()) + continue; + + m_imageData.push_back(imgData); + maxMipLevel = qMax(maxMipLevel, img.mipLevel); + + // If the texture doesn't have a texture generator, we will + // derive some properties from the first TextureImage (layer=0, miplvl=0, face=0) + if (!m_textureData && img.layer == 0 && img.mipLevel == 0 && img.face == QAbstractTexture::CubeMapPositiveX) { + if (imgData->width() != -1 && imgData->height() != -1 && imgData->depth() != -1) { + m_properties.width = imgData->width(); + m_properties.height = imgData->height(); + m_properties.depth = imgData->depth(); + } + // Set the format of the texture if the texture format is set to Automatic + if (m_properties.format == QAbstractTexture::Automatic) { + m_properties.format = static_cast<QAbstractTexture::TextureFormat>(imgData->format()); + } + setDirtyFlag(Properties, true); + } + } + + // make sure the number of mip levels is set when there is no texture data generator + if (!m_dataFunctor) { + m_properties.mipLevels = maxMipLevel + 1; + setDirtyFlag(Properties, true); + } +} + +// Called from RenderThread +GLTexture::TextureUpdateInfo GLTexture::createOrUpdateGLTexture() +{ + TextureUpdateInfo textureInfo; + m_wasTextureRecreated = false; + + const bool hasSharedTextureId = m_sharedTextureId > 0; + // Only load texture data if we are not using a sharedTextureId + // Check if dataFunctor or images have changed + if (!hasSharedTextureId) { + // If dataFunctor exists and we have no data and it hasn´t run yet + if (m_dataFunctor && !m_textureData && m_dataFunctor.get() != m_pendingDataFunctor ) { + const bool successfullyLoadedTextureData = loadTextureDataFromGenerator(); + // If successful, m_textureData has content + if (successfullyLoadedTextureData) { + setDirtyFlag(Properties, true); + setDirtyFlag(TextureData, true); + } else { + if (m_pendingDataFunctor != m_dataFunctor.get()) { + qWarning() << "[Qt3DRender::GLTexture] No QTextureData generated from Texture Generator yet. Texture will be invalid for this frame"; + m_pendingDataFunctor = m_dataFunctor.get(); + } + textureInfo.properties.status = QAbstractTexture::Loading; + return textureInfo; + } + } + + // If images have changed, clear previous images data + // and regenerate m_imageData for the images + if (testDirtyFlag(TextureImageData)) { + m_imageData.clear(); + loadTextureDataFromImages(); + // Mark for upload if we actually have something to upload + if (!m_imageData.empty()) { + setDirtyFlag(TextureData, true); + } + // Reset image flag + setDirtyFlag(TextureImageData, false); + } + + // Don't try to create the texture if the target or format was still not set + // Format should either be set by user or if Automatic + // by either the dataGenerator of the texture or the first Image + // Target should explicitly be set by the user or the dataGenerator + if (m_properties.target == QAbstractTexture::TargetAutomatic || + m_properties.format == QAbstractTexture::Automatic || + m_properties.format == QAbstractTexture::NoFormat) { + textureInfo.properties.status = QAbstractTexture::Error; + return textureInfo; + } + } + + // If the properties changed or texture has become a shared texture from a + // 3rd party engine, we need to destroy and maybe re-allocate the texture + if (testDirtyFlag(Properties) || testDirtyFlag(SharedTextureId)) { + delete m_gl; + m_gl = nullptr; + textureInfo.wasUpdated = true; + // If we are destroyed because of some property change but still have (some) of + // our content data make sure we are marked for upload + // TO DO: We should actually check if the textureData is still correct + // in regard to the size, target and format of the texture though. + if (!testDirtyFlag(SharedTextureId) && + (m_textureData || !m_imageData.empty() || !m_pendingTextureDataUpdates.empty())) + setDirtyFlag(TextureData, true); + } + + m_properties.status = QAbstractTexture::Ready; + + if (testDirtyFlag(SharedTextureId) || hasSharedTextureId) { + // Update m_properties by doing introspection on the texture + if (hasSharedTextureId) + introspectPropertiesFromSharedTextureId(); + setDirtyFlag(SharedTextureId, false); + } else { + // We only build a QOpenGLTexture if we have no shared textureId set + if (!m_gl) { + m_gl = buildGLTexture(); + if (!m_gl) { + qWarning() << "[Qt3DRender::GLTexture] failed to create texture"; + textureInfo.properties.status = QAbstractTexture::Error; + return textureInfo; + } + + m_gl->allocateStorage(); + if (!m_gl->isStorageAllocated()) { + qWarning() << "[Qt3DRender::GLTexture] failed to allocate texture"; + textureInfo.properties.status = QAbstractTexture::Error; + return textureInfo; + } + m_wasTextureRecreated = true; + } + + textureInfo.texture = m_gl; + + // need to (re-)upload texture data? + const bool needsUpload = testDirtyFlag(TextureData); + if (needsUpload) { + uploadGLTextureData(); + setDirtyFlag(TextureData, false); + } + + // need to set texture parameters? + if (testDirtyFlag(Properties) || testDirtyFlag(Parameters)) { + updateGLTextureParameters(); + setDirtyFlag(Properties, false); + setDirtyFlag(Parameters, false); + } + } + + textureInfo.properties = m_properties; + + return textureInfo; +} + +RenderBuffer *GLTexture::getOrCreateRenderBuffer() +{ + if (m_dataFunctor && !m_textureData) { + m_textureData = m_dataFunctor->operator()(); + if (m_textureData) { + if (m_properties.target != QAbstractTexture::TargetAutomatic) + qWarning() << "[Qt3DRender::GLTexture] [renderbuffer] When a texture provides a generator, it's target is expected to be TargetAutomatic"; + + m_properties.width = m_textureData->width(); + m_properties.height = m_textureData->height(); + m_properties.format = m_textureData->format(); + + setDirtyFlag(Properties); + } else { + if (m_pendingDataFunctor != m_dataFunctor.get()) { + qWarning() << "[Qt3DRender::GLTexture] [renderbuffer] No QTextureData generated from Texture Generator yet. Texture will be invalid for this frame"; + m_pendingDataFunctor = m_dataFunctor.get(); + } + return nullptr; + } + } + + if (testDirtyFlag(Properties)) { + delete m_renderBuffer; + m_renderBuffer = nullptr; + } + + if (!m_renderBuffer) + m_renderBuffer = new RenderBuffer(m_properties.width, m_properties.height, m_properties.format); + + setDirtyFlag(Properties, false); + setDirtyFlag(Parameters, false); + + return m_renderBuffer; +} + +// This must be called from the RenderThread +// So GLTexture release from the manager can only be done from that thread +void GLTexture::cleanup() +{ + destroy(); +} + +void GLTexture::setParameters(const TextureParameters ¶ms) +{ + if (m_parameters != params) { + m_parameters = params; + setDirtyFlag(Parameters); + } +} + +void GLTexture::setProperties(const TextureProperties &props) +{ + if (m_properties != props) { + m_properties = props; + setDirtyFlag(Properties); + } +} + +void GLTexture::setImages(const QVector<Image> &images) +{ + // check if something has changed at all + bool same = (images.size() == m_images.size()); + if (same) { + for (int i = 0; i < images.size(); i++) { + if (images[i] != m_images[i]) { + same = false; + break; + } + } + } + + + if (!same) { + m_images = images; + requestImageUpload(); + } +} + +void GLTexture::setGenerator(const QTextureGeneratorPtr &generator) +{ + m_textureData.reset(); + m_dataFunctor = generator; + m_pendingDataFunctor = nullptr; + requestUpload(); +} + +void GLTexture::setSharedTextureId(int textureId) +{ + if (m_sharedTextureId != textureId) { + m_sharedTextureId = textureId; + setDirtyFlag(SharedTextureId); + } +} + +void GLTexture::addTextureDataUpdates(const QVector<QTextureDataUpdate> &updates) +{ + m_pendingTextureDataUpdates += updates; + requestUpload(); +} + +// Return nullptr if +// - context cannot be obtained +// - texture hasn't yet been loaded +QOpenGLTexture *GLTexture::buildGLTexture() +{ + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + if (!ctx) { + qWarning() << Q_FUNC_INFO << "requires an OpenGL context"; + return nullptr; + } + + const QAbstractTexture::Target actualTarget = m_properties.target; + if (actualTarget == QAbstractTexture::TargetAutomatic) { + // If the target is automatic at this point, it means that the texture + // hasn't been loaded yet (case of remote urls) and that loading failed + // and that target format couldn't be deduced + return nullptr; + } + + QOpenGLTexture* glTex = new QOpenGLTexture(static_cast<QOpenGLTexture::Target>(actualTarget)); + + // m_format may not be ES2 compatible. Now it's time to convert it, if necessary. + QAbstractTexture::TextureFormat format = m_properties.format; + if (ctx->isOpenGLES() && ctx->format().majorVersion() < 3) { + switch (m_properties.format) { + case QAbstractTexture::RGBA8_UNorm: + case QAbstractTexture::RGBAFormat: + format = QAbstractTexture::RGBAFormat; + break; + case QAbstractTexture::RGB8_UNorm: + case QAbstractTexture::RGBFormat: + format = QAbstractTexture::RGBFormat; + break; + case QAbstractTexture::DepthFormat: + format = QAbstractTexture::DepthFormat; + break; + default: + auto warning = qWarning(); + warning << "Could not find a matching OpenGL ES 2.0 texture format:"; + QtDebugUtils::formatQEnum(warning, m_properties.format); + break; + } + } + + // Map ETC1 to ETC2 when supported. This allows using features like + // immutable storage as ETC2 is standard in GLES 3.0, while the ETC1 extension + // is written against GLES 1.0. + if (m_properties.format == QAbstractTexture::RGB8_ETC1) { + if ((ctx->isOpenGLES() && ctx->format().majorVersion() >= 3) + || ctx->hasExtension(QByteArrayLiteral("GL_OES_compressed_ETC2_RGB8_texture")) + || ctx->hasExtension(QByteArrayLiteral("GL_ARB_ES3_compatibility"))) + format = m_properties.format = QAbstractTexture::RGB8_ETC2; + } + + glTex->setFormat(m_properties.format == QAbstractTexture::Automatic ? + QOpenGLTexture::NoFormat : + static_cast<QOpenGLTexture::TextureFormat>(format)); + glTex->setSize(m_properties.width, m_properties.height, m_properties.depth); + // Set layers count if texture array + if (actualTarget == QAbstractTexture::Target1DArray || + actualTarget == QAbstractTexture::Target2DArray || + actualTarget == QAbstractTexture::Target2DMultisampleArray || + actualTarget == QAbstractTexture::TargetCubeMapArray) { + glTex->setLayers(m_properties.layers); + } + + if (actualTarget == QAbstractTexture::Target2DMultisample || + actualTarget == QAbstractTexture::Target2DMultisampleArray) { + // Set samples count if multisampled texture + // (multisampled textures don't have mipmaps) + glTex->setSamples(m_properties.samples); + } else if (m_properties.generateMipMaps) { + glTex->setMipLevels(glTex->maximumMipLevels()); + } else { + glTex->setAutoMipMapGenerationEnabled(false); + if (glTex->hasFeature(QOpenGLTexture::TextureMipMapLevel)) { + glTex->setMipBaseLevel(0); + glTex->setMipMaxLevel(m_properties.mipLevels - 1); + } + glTex->setMipLevels(m_properties.mipLevels); + } + + if (!glTex->create()) { + qWarning() << Q_FUNC_INFO << "creating QOpenGLTexture failed"; + return nullptr; + } + + return glTex; +} + +void GLTexture::uploadGLTextureData() +{ + // Upload all QTexImageData set by the QTextureGenerator + if (m_textureData) { + const QVector<QTextureImageDataPtr> imgData = m_textureData->imageData(); + + for (const QTextureImageDataPtr &data : imgData) { + const int mipLevels = m_properties.generateMipMaps ? 1 : data->mipLevels(); + + for (int layer = 0; layer < data->layers(); layer++) { + for (int face = 0; face < data->faces(); face++) { + for (int level = 0; level < mipLevels; level++) { + // ensure we don't accidentally cause a detach / copy of the raw bytes + const QByteArray bytes(data->data(layer, face, level)); + uploadGLData(m_gl, level, layer, + static_cast<QOpenGLTexture::CubeMapFace>(QOpenGLTexture::CubeMapPositiveX + face), + bytes, data); + } + } + } + } + } + + // Upload all QTexImageData references by the TextureImages + for (int i = 0; i < std::min(m_images.size(), m_imageData.size()); i++) { + const QTextureImageDataPtr &imgData = m_imageData.at(i); + // Here the bytes in the QTextureImageData contain data for a single + // layer, face or mip level, unlike the QTextureGenerator case where + // they are in a single blob. Hence QTextureImageData::data() is not suitable. + const QByteArray bytes(QTextureImageDataPrivate::get(imgData.get())->m_data); + uploadGLData(m_gl, m_images[i].mipLevel, m_images[i].layer, + static_cast<QOpenGLTexture::CubeMapFace>(m_images[i].face), + bytes, imgData); + } + // Free up image data once content has been uploaded + // Note: if data functor stores the data, this won't really free anything though + m_imageData.clear(); + + // Update data from TextureUpdates + const QVector<QTextureDataUpdate> textureDataUpdates = std::move(m_pendingTextureDataUpdates); + for (const QTextureDataUpdate &update : textureDataUpdates) { + const QTextureImageDataPtr imgData = update.data(); + + if (!imgData) { + qWarning() << Q_FUNC_INFO << "QTextureDataUpdate no QTextureImageData set"; + continue; + } + + const int xOffset = update.x(); + const int yOffset = update.y(); + const int zOffset = update.z(); + const int xExtent = xOffset + imgData->width(); + const int yExtent = yOffset + imgData->height(); + const int zExtent = zOffset + imgData->depth(); + + // Check update is compatible with our texture + if (xOffset >= m_gl->width() || + yOffset >= m_gl->height() || + zOffset >= m_gl->depth() || + xExtent > m_gl->width() || + yExtent > m_gl->height() || + zExtent > m_gl->depth() || + update.mipLevel() >= m_gl->mipLevels() || + update.layer() >= m_gl->layers()) { + qWarning() << Q_FUNC_INFO << "QTextureDataUpdate incompatible with texture"; + continue; + } + + const QByteArray bytes = (QTextureImageDataPrivate::get(imgData.get())->m_data); + // Here the bytes in the QTextureImageData contain data for a single + // layer, face or mip level, unlike the QTextureGenerator case where + // they are in a single blob. Hence QTextureImageData::data() is not suitable. + + uploadGLData(m_gl, + update.mipLevel(), update.layer(), + static_cast<QOpenGLTexture::CubeMapFace>(update.face()), + xOffset, yOffset, zOffset, + bytes, imgData); + } +} + +void GLTexture::updateGLTextureParameters() +{ + const QAbstractTexture::Target actualTarget = m_properties.target; + const bool isMultisampledTexture = (actualTarget == QAbstractTexture::Target2DMultisample || + actualTarget == QAbstractTexture::Target2DMultisampleArray); + // Multisampled textures can only be accessed by texelFetch in shaders + // and don't support wrap modes and mig/mag filtes + if (isMultisampledTexture) + return; + + m_gl->setWrapMode(QOpenGLTexture::DirectionS, static_cast<QOpenGLTexture::WrapMode>(m_parameters.wrapModeX)); + if (actualTarget != QAbstractTexture::Target1D && + actualTarget != QAbstractTexture::Target1DArray && + actualTarget != QAbstractTexture::TargetBuffer) + m_gl->setWrapMode(QOpenGLTexture::DirectionT, static_cast<QOpenGLTexture::WrapMode>(m_parameters.wrapModeY)); + if (actualTarget == QAbstractTexture::Target3D) + m_gl->setWrapMode(QOpenGLTexture::DirectionR, static_cast<QOpenGLTexture::WrapMode>(m_parameters.wrapModeZ)); + m_gl->setMinMagFilters(static_cast<QOpenGLTexture::Filter>(m_parameters.minificationFilter), + static_cast<QOpenGLTexture::Filter>(m_parameters.magnificationFilter)); + if (m_gl->hasFeature(QOpenGLTexture::AnisotropicFiltering)) + m_gl->setMaximumAnisotropy(m_parameters.maximumAnisotropy); + if (m_gl->hasFeature(QOpenGLTexture::TextureComparisonOperators)) { + m_gl->setComparisonFunction(static_cast<QOpenGLTexture::ComparisonFunction>(m_parameters.comparisonFunction)); + m_gl->setComparisonMode(static_cast<QOpenGLTexture::ComparisonMode>(m_parameters.comparisonMode)); + } +} + +void GLTexture::introspectPropertiesFromSharedTextureId() +{ + // We know that the context is active when this function is called + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + if (!ctx) { + qWarning() << Q_FUNC_INFO << "requires an OpenGL context"; + return; + } + QOpenGLFunctions *gl = ctx->functions(); + + // If the user has set the target format himself, we won't try to deduce it + if (m_properties.target != QAbstractTexture::TargetAutomatic) + return; + + const QAbstractTexture::Target targets[] = { + QAbstractTexture::Target2D, + QAbstractTexture::TargetCubeMap, +#ifndef QT_OPENGL_ES_2 + QAbstractTexture::Target1D, + QAbstractTexture::Target1DArray, + QAbstractTexture::Target3D, + QAbstractTexture::Target2DArray, + QAbstractTexture::TargetCubeMapArray, + QAbstractTexture::Target2DMultisample, + QAbstractTexture::Target2DMultisampleArray, + QAbstractTexture::TargetRectangle, + QAbstractTexture::TargetBuffer, +#endif + }; + +#ifndef QT_OPENGL_ES_2 + // Try to find texture target with GL 4.5 functions + const QPair<int, int> ctxGLVersion = ctx->format().version(); + if (ctxGLVersion.first > 4 || (ctxGLVersion.first == 4 && ctxGLVersion.second >= 5)) { + // Only for GL 4.5+ +#ifdef GL_TEXTURE_TARGET + QOpenGLFunctions_4_5_Core *gl5 = ctx->versionFunctions<QOpenGLFunctions_4_5_Core>(); + if (gl5 != nullptr) + gl5->glGetTextureParameteriv(m_sharedTextureId, GL_TEXTURE_TARGET, reinterpret_cast<int *>(&m_properties.target)); +#endif + } +#endif + + // If GL 4.5 function unavailable or not working, try a slower way + if (m_properties.target == QAbstractTexture::TargetAutomatic) { + // // OpenGL offers no proper way of querying for the target of a texture given its id + gl->glActiveTexture(GL_TEXTURE0); + + const GLenum targetBindings[] = { + GL_TEXTURE_BINDING_2D, + GL_TEXTURE_BINDING_CUBE_MAP, +#ifndef QT_OPENGL_ES_2 + GL_TEXTURE_BINDING_1D, + GL_TEXTURE_BINDING_1D_ARRAY, + GL_TEXTURE_BINDING_3D, + GL_TEXTURE_BINDING_2D_ARRAY, + GL_TEXTURE_BINDING_CUBE_MAP_ARRAY, + GL_TEXTURE_BINDING_2D_MULTISAMPLE, + GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY, + GL_TEXTURE_BINDING_RECTANGLE, + GL_TEXTURE_BINDING_BUFFER +#endif + }; + + Q_ASSERT(sizeof(targetBindings) / sizeof(targetBindings[0] == sizeof(targets) / sizeof(targets[0]))); + + for (uint i = 0; i < sizeof(targetBindings) / sizeof(targetBindings[0]); ++i) { + const int target = targets[i]; + gl->glBindTexture(target, m_sharedTextureId); + int boundId = 0; + gl->glGetIntegerv(targetBindings[i], &boundId); + gl->glBindTexture(target, 0); + if (boundId == m_sharedTextureId) { + m_properties.target = static_cast<QAbstractTexture::Target>(target); + break; + } + } + } + + // Return early if we weren't able to find texture target + if (std::find(std::begin(targets), std::end(targets), m_properties.target) == std::end(targets)) { + qWarning() << "Unable to determine texture target for shared GL texture"; + return; + } + + // Bind texture once we know its target + gl->glBindTexture(m_properties.target, m_sharedTextureId); + + // TO DO: Improve by using glGetTextureParameters when available which + // support direct state access +#ifndef GL_TEXTURE_MAX_LEVEL +#define GL_TEXTURE_MAX_LEVEL 0x813D +#endif + +#ifndef GL_TEXTURE_WRAP_R +#define GL_TEXTURE_WRAP_R 0x8072 +#endif + + gl->glGetTexParameteriv(int(m_properties.target), GL_TEXTURE_MAX_LEVEL, reinterpret_cast<int *>(&m_properties.mipLevels)); + gl->glGetTexParameteriv(int(m_properties.target), GL_TEXTURE_MIN_FILTER, reinterpret_cast<int *>(&m_parameters.minificationFilter)); + gl->glGetTexParameteriv(int(m_properties.target), GL_TEXTURE_MAG_FILTER, reinterpret_cast<int *>(&m_parameters.magnificationFilter)); + gl->glGetTexParameteriv(int(m_properties.target), GL_TEXTURE_WRAP_R, reinterpret_cast<int *>(&m_parameters.wrapModeX)); + gl->glGetTexParameteriv(int(m_properties.target), GL_TEXTURE_WRAP_S, reinterpret_cast<int *>(&m_parameters.wrapModeY)); + gl->glGetTexParameteriv(int(m_properties.target), GL_TEXTURE_WRAP_T, reinterpret_cast<int *>(&m_parameters.wrapModeZ)); + +#ifndef QT_OPENGL_ES_2 + // Try to retrieve dimensions (not available on ES 2.0) + if (!ctx->isOpenGLES()) { + QOpenGLFunctions_3_1 *gl3 = ctx->versionFunctions<QOpenGLFunctions_3_1>(); + if (!gl3) { + qWarning() << "Failed to retrieve shared texture dimensions"; + return; + } + + gl3->glGetTexLevelParameteriv(int(m_properties.target), 0, GL_TEXTURE_WIDTH, reinterpret_cast<int *>(&m_properties.width)); + gl3->glGetTexLevelParameteriv(int(m_properties.target), 0, GL_TEXTURE_HEIGHT, reinterpret_cast<int *>(&m_properties.height)); + gl3->glGetTexLevelParameteriv(int(m_properties.target), 0, GL_TEXTURE_DEPTH, reinterpret_cast<int *>(&m_properties.depth)); + gl3->glGetTexLevelParameteriv(int(m_properties.target), 0, GL_TEXTURE_INTERNAL_FORMAT, reinterpret_cast<int *>(&m_properties.format)); + } +#endif + + gl->glBindTexture(m_properties.target, 0); +} + +} // namespace OpenGL +} // namespace Render +} // namespace Qt3DRender + +QT_END_NAMESPACE |