diff options
Diffstat (limited to 'src/quick/scenegraph/compressedtexture/qsgpkmhandler.cpp')
| -rw-r--r-- | src/quick/scenegraph/compressedtexture/qsgpkmhandler.cpp | 171 |
1 files changed, 40 insertions, 131 deletions
diff --git a/src/quick/scenegraph/compressedtexture/qsgpkmhandler.cpp b/src/quick/scenegraph/compressedtexture/qsgpkmhandler.cpp index 62066a136a..daec23d478 100644 --- a/src/quick/scenegraph/compressedtexture/qsgpkmhandler.cpp +++ b/src/quick/scenegraph/compressedtexture/qsgpkmhandler.cpp @@ -38,173 +38,82 @@ ****************************************************************************/ #include "qsgpkmhandler_p.h" +#include "qsgcompressedtexture_p.h" #include <QFile> #include <QDebug> #include <qendian.h> #include <qopenglfunctions.h> #include <qqmlfile.h> +#include <QOpenGLTexture> //#define ETC_DEBUG -#ifndef GL_ETC1_RGB8_OES - #define GL_ETC1_RGB8_OES 0x8d64 -#endif - -#ifndef GL_COMPRESSED_RGB8_ETC2 - #define GL_COMPRESSED_RGB8_ETC2 0x9274 -#endif - -#ifndef GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 - #define GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 0x9276 -#endif - -#ifndef GL_COMPRESSED_RGBA8_ETC2_EAC - #define GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278 -#endif - QT_BEGIN_NAMESPACE static const int headerSize = 16; static unsigned int typeMap[5] = { - GL_ETC1_RGB8_OES, - GL_COMPRESSED_RGB8_ETC2, - 0, // unused - GL_COMPRESSED_RGBA8_ETC2_EAC, - GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 + QOpenGLTexture::RGB8_ETC1, // GL_ETC1_RGB8_OES, + QOpenGLTexture::RGB8_ETC2, // GL_COMPRESSED_RGB8_ETC2, + 0, // unused (obsolete) + QOpenGLTexture::RGBA8_ETC2_EAC, // GL_COMPRESSED_RGBA8_ETC2_EAC, + QOpenGLTexture::RGB8_PunchThrough_Alpha1_ETC2 // GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 }; -QEtcTexture::QEtcTexture() - : m_texture_id(0), m_uploaded(false) -{ - initializeOpenGLFunctions(); -} - -QEtcTexture::~QEtcTexture() -{ - if (m_texture_id) - glDeleteTextures(1, &m_texture_id); -} - -int QEtcTexture::textureId() const -{ - if (m_texture_id == 0) { - QEtcTexture *texture = const_cast<QEtcTexture*>(this); - texture->glGenTextures(1, &texture->m_texture_id); - } - return m_texture_id; -} - -bool QEtcTexture::hasAlphaChannel() const -{ - return m_type == GL_COMPRESSED_RGBA8_ETC2_EAC || - m_type == GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2; -} - - -void QEtcTexture::bind() +bool QSGPkmHandler::canRead(const QByteArray &suffix, const QByteArray &block) { - if (m_uploaded && m_texture_id) { - glBindTexture(GL_TEXTURE_2D, m_texture_id); - return; - } - - if (m_texture_id == 0) - glGenTextures(1, &m_texture_id); - glBindTexture(GL_TEXTURE_2D, m_texture_id); - -#ifdef ETC_DEBUG - qDebug() << "glCompressedTexImage2D, width: " << m_size.width() << "height" << m_size.height() << - "paddedWidth: " << m_paddedSize.width() << "paddedHeight: " << m_paddedSize.height(); -#endif + Q_UNUSED(suffix) -#ifndef QT_NO_DEBUG - while (glGetError() != GL_NO_ERROR) { } -#endif - - QOpenGLContext *ctx = QOpenGLContext::currentContext(); - Q_ASSERT(ctx != 0); - const int compFactor = m_type == GL_COMPRESSED_RGBA8_ETC2_EAC ? 1 : 2; - ctx->functions()->glCompressedTexImage2D(GL_TEXTURE_2D, 0, m_type, - m_size.width(), m_size.height(), 0, - (m_paddedSize.width() * m_paddedSize.height()) / compFactor, - m_data.data() + headerSize); - -#ifndef QT_NO_DEBUG - // Gracefully fail in case of an error... - GLuint error = glGetError(); - if (error != GL_NO_ERROR) { - qDebug () << "glCompressedTexImage2D for compressed texture failed, error: " << error; - glBindTexture(GL_TEXTURE_2D, 0); - glDeleteTextures(1, &m_texture_id); - m_texture_id = 0; - return; - } -#endif - - m_uploaded = true; - updateBindOptions(true); + return block.startsWith("PKM "); } -class QEtcTextureFactory : public QQuickTextureFactory -{ -public: - QByteArray m_data; - QSize m_size; - QSize m_paddedSize; - unsigned int m_type; - - QSize textureSize() const { return m_size; } - int textureByteCount() const { return m_data.size(); } - - QSGTexture *createTexture(QQuickWindow *) const { - QEtcTexture *texture = new QEtcTexture; - texture->m_data = m_data; - texture->m_size = m_size; - texture->m_paddedSize = m_paddedSize; - texture->m_type = m_type; - return texture; - } -}; - -QQuickTextureFactory *QSGPkmHandler::read(QIODevice *device) +QQuickTextureFactory *QSGPkmHandler::read() { - QScopedPointer<QEtcTextureFactory> ret(new QEtcTextureFactory); - ret->m_data = device->readAll(); - if (ret->m_data.isEmpty() || ret->m_data.size() < headerSize) + if (!device()) return nullptr; - const char *rawData = ret->m_data.constData(); + QSGCompressedTexture::DataPtr texData(QSGCompressedTexture::DataPtr::create()); - // magic number - if (qstrncmp(rawData, "PKM ", 4) != 0) + texData->data = device()->readAll(); + if (texData->data.size() < headerSize || !canRead(QByteArray(), texData->data)) { + qCDebug(QSG_LOG_TEXTUREIO, "Invalid PKM file %s", logName().constData()); return nullptr; + } + + const char *rawData = texData->data.constData(); - // currently ignore version (rawData + 4) + // ignore version (rawData + 4 & 5) // texture type quint16 type = qFromBigEndian<quint16>(rawData + 6); - static int typeCount = sizeof(typeMap)/sizeof(typeMap[0]); - if (type >= typeCount) + if (type > sizeof(typeMap)/sizeof(typeMap[0])) { + qCDebug(QSG_LOG_TEXTUREIO, "Unknown compression format in PKM file %s", logName().constData()); return nullptr; - ret->m_type = typeMap[type]; + } + texData->format = typeMap[type]; + texData->hasAlpha = !QSGCompressedTexture::formatIsOpaque(texData->format); // texture size - ret->m_paddedSize.setWidth(qFromBigEndian<quint16>(rawData + 8)); - ret->m_paddedSize.setHeight(qFromBigEndian<quint16>(rawData + 10)); - if ((ret->m_paddedSize.width() * ret->m_paddedSize.height()) / 2 > ret->m_data.size() - headerSize) - return nullptr; - ret->m_size.setWidth(qFromBigEndian<quint16>(rawData + 12)); - ret->m_size.setHeight(qFromBigEndian<quint16>(rawData + 14)); - if (ret->m_size.isEmpty()) + /* Actual data length depends on format; for now just use 0, i.e. rest-of-file + QSize paddedSize(qFromBigEndian<quint16>(rawData + 8), qFromBigEndian<quint16>(rawData + 10)); + texData->dataLength = (paddedSize.width() / 4) * (paddedSize.height() / 4) * 8; + */ + QSize texSize(qFromBigEndian<quint16>(rawData + 12), qFromBigEndian<quint16>(rawData + 14)); + texData->size = texSize; + + texData->dataOffset = headerSize; + + if (!texData->isValid()) { + qCDebug(QSG_LOG_TEXTUREIO, "Invalid values in header of PKM file %s", logName().constData()); return nullptr; + } + texData->logName = logName(); #ifdef ETC_DEBUG - qDebug() << "requestTexture returning: " << ret->m_data.length() << "bytes; width: " << ret->m_size.width() << ", height: " << ret->m_size.height(); + qDebug() << "PKM file handler read" << texData.data(); #endif - - return ret.take(); + return new QSGCompressedTextureFactory(texData); } QT_END_NAMESPACE |