162e1ca996
Logging can be enabled in release build like this: QT_LOGGING_RULES="fernschreiber.*=true" harbour-fernschreiber See https://doc.qt.io/qt-5/qloggingcategory.html for more details.
310 lines
8.3 KiB
C++
310 lines
8.3 KiB
C++
/*
|
|
Copyright (C) 2020 Slava Monich et al.
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "tgsplugin.h"
|
|
#include "rlottie.h"
|
|
|
|
#include <QSize>
|
|
#include <QImage>
|
|
#include <QImageIOHandler>
|
|
#include <QFileDevice>
|
|
#include <QFileInfo>
|
|
|
|
#include <zlib.h>
|
|
|
|
#define DEBUG_MODULE TgsIOHandler
|
|
#include "debuglog.h"
|
|
#define LOG_(x) LOG(qPrintable(fileName) << x)
|
|
|
|
class TgsIOHandler : public QImageIOHandler
|
|
{
|
|
public:
|
|
static const QByteArray NAME;
|
|
static const QByteArray GZ_MAGIC;
|
|
typedef std::string ByteArray;
|
|
|
|
TgsIOHandler(QIODevice* device, const QByteArray& format);
|
|
~TgsIOHandler();
|
|
|
|
ByteArray uncompress();
|
|
bool load();
|
|
void render(int frameIndex);
|
|
void finishRendering();
|
|
|
|
// QImageIOHandler
|
|
bool canRead() const Q_DECL_OVERRIDE;
|
|
QByteArray name() const Q_DECL_OVERRIDE;
|
|
bool read(QImage* image) Q_DECL_OVERRIDE;
|
|
QVariant option(ImageOption option) const Q_DECL_OVERRIDE;
|
|
bool supportsOption(ImageOption option) const Q_DECL_OVERRIDE;
|
|
bool jumpToNextImage() Q_DECL_OVERRIDE;
|
|
bool jumpToImage(int imageNumber) Q_DECL_OVERRIDE;
|
|
int loopCount() const Q_DECL_OVERRIDE;
|
|
int imageCount() const Q_DECL_OVERRIDE;
|
|
int nextImageDelay() const Q_DECL_OVERRIDE;
|
|
int currentImageNumber() const Q_DECL_OVERRIDE;
|
|
QRect currentImageRect() const Q_DECL_OVERRIDE;
|
|
|
|
public:
|
|
QString fileName;
|
|
QSize size;
|
|
qreal frameRate;
|
|
int frameCount;
|
|
int currentFrame;
|
|
QImage firstImage;
|
|
QImage prevImage;
|
|
QImage currentImage;
|
|
std::future<rlottie::Surface> currentRender;
|
|
std::unique_ptr<rlottie::Animation> animation;
|
|
};
|
|
|
|
const QByteArray TgsIOHandler::NAME("tgs");
|
|
const QByteArray TgsIOHandler::GZ_MAGIC("\x1f\x8b");
|
|
|
|
TgsIOHandler::TgsIOHandler(QIODevice* device, const QByteArray& format) :
|
|
frameRate(0.),
|
|
frameCount(0),
|
|
currentFrame(0)
|
|
{
|
|
QFileDevice* file = qobject_cast<QFileDevice*>(device);
|
|
if (file) {
|
|
fileName = QFileInfo(file->fileName()).fileName();
|
|
}
|
|
setDevice(device);
|
|
setFormat(format);
|
|
}
|
|
|
|
TgsIOHandler::~TgsIOHandler()
|
|
{
|
|
if (currentRender.valid()) {
|
|
currentRender.get();
|
|
}
|
|
LOG_("Done");
|
|
}
|
|
|
|
TgsIOHandler::ByteArray TgsIOHandler::uncompress()
|
|
{
|
|
ByteArray unzipped;
|
|
const QByteArray zipped(device()->readAll());
|
|
if (!zipped.isEmpty()) {
|
|
z_stream unzip;
|
|
memset(&unzip, 0, sizeof(unzip));
|
|
unzip.next_in = (Bytef*)zipped.constData();
|
|
// Add 16 for decoding gzip header
|
|
int zerr = inflateInit2(&unzip, MAX_WBITS + 16);
|
|
if (zerr == Z_OK) {
|
|
const uint chunk = 0x1000;
|
|
unzipped.resize(chunk);
|
|
unzip.next_out = (Bytef*)unzipped.data();
|
|
unzip.avail_in = zipped.size();
|
|
unzip.avail_out = chunk;
|
|
LOG_("Compressed size" << zipped.size());
|
|
while (unzip.avail_out > 0 && zerr == Z_OK) {
|
|
zerr = inflate(&unzip, Z_NO_FLUSH);
|
|
if (zerr == Z_OK && unzip.avail_out < chunk) {
|
|
// Data may get relocated, update next_out too
|
|
unzipped.resize(unzipped.size() + chunk);
|
|
unzip.next_out = (Bytef*)unzipped.data() + unzip.total_out;
|
|
unzip.avail_out += chunk;
|
|
}
|
|
}
|
|
if (zerr == Z_STREAM_END) {
|
|
unzipped.resize(unzip.next_out - (Bytef*)unzipped.data());
|
|
LOG_("Uncompressed size" << unzipped.size());
|
|
} else {
|
|
unzipped.clear();
|
|
}
|
|
inflateEnd(&unzip);
|
|
}
|
|
}
|
|
return unzipped;
|
|
}
|
|
|
|
bool TgsIOHandler::load()
|
|
{
|
|
if (!animation && device()) {
|
|
ByteArray json(uncompress());
|
|
if (json.size() > 0) {
|
|
animation = rlottie::Animation::loadFromData(json, std::string(), std::string(), false);
|
|
if (animation) {
|
|
size_t width, height;
|
|
animation->size(width, height);
|
|
frameRate = animation->frameRate();
|
|
frameCount = (int) animation->totalFrame();
|
|
size = QSize(width, height);
|
|
LOG_(size << frameCount << "frames," << frameRate << "fps");
|
|
render(0); // Pre-render first frame
|
|
}
|
|
}
|
|
}
|
|
return animation != Q_NULLPTR;
|
|
}
|
|
|
|
void TgsIOHandler::finishRendering()
|
|
{
|
|
if (currentRender.valid()) {
|
|
currentRender.get();
|
|
prevImage = currentImage;
|
|
if (!currentFrame && !firstImage.isNull()) {
|
|
LOG_("Rendered first frame");
|
|
firstImage = currentImage;
|
|
}
|
|
} else {
|
|
// Must be the first frame
|
|
prevImage = currentImage;
|
|
}
|
|
}
|
|
|
|
void TgsIOHandler::render(int frameIndex)
|
|
{
|
|
currentFrame = frameIndex % frameCount;
|
|
if (!currentFrame && !firstImage.isNull()) {
|
|
// The first frame only gets rendered once
|
|
currentImage = firstImage;
|
|
} else {
|
|
const int width = (int)size.width();
|
|
const int height = (int)size.height();
|
|
currentImage = QImage(width, height, QImage::Format_ARGB32_Premultiplied);
|
|
currentRender = animation->render(currentFrame,
|
|
rlottie::Surface((uint32_t*)currentImage.bits(),
|
|
width, height, currentImage.bytesPerLine()));
|
|
}
|
|
}
|
|
|
|
bool TgsIOHandler::read(QImage* out)
|
|
{
|
|
if (load() && frameCount > 0) {
|
|
// We must have the first frame, will wait if necessary
|
|
if (currentFrame && currentRender.valid()) {
|
|
std::future_status status = currentRender.wait_for(std::chrono::milliseconds(0));
|
|
if (status != std::future_status::ready) {
|
|
LOG_("Skipping frame" << currentFrame);
|
|
currentFrame = (currentFrame + 1) % frameCount;
|
|
*out = prevImage;
|
|
return true;
|
|
}
|
|
}
|
|
finishRendering();
|
|
*out = currentImage;
|
|
render(currentFrame + 1);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TgsIOHandler::canRead() const
|
|
{
|
|
if (!device()) {
|
|
return false;
|
|
} else if (animation) {
|
|
return true;
|
|
} else {
|
|
// Need to support uncompressed data?
|
|
return device()->peek(2) == GZ_MAGIC;
|
|
}
|
|
}
|
|
|
|
QByteArray TgsIOHandler::name() const
|
|
{
|
|
return NAME;
|
|
}
|
|
|
|
QVariant TgsIOHandler::option(ImageOption option) const
|
|
{
|
|
switch (option) {
|
|
case Size:
|
|
((TgsIOHandler*)this)->load(); // Cast off const
|
|
return size;
|
|
case Animation:
|
|
return true;
|
|
case ImageFormat:
|
|
return QImage::Format_ARGB32_Premultiplied;
|
|
default:
|
|
break;
|
|
}
|
|
return QVariant();
|
|
}
|
|
|
|
bool TgsIOHandler::supportsOption(ImageOption option) const
|
|
{
|
|
switch(option) {
|
|
case Size:
|
|
case Animation:
|
|
case ImageFormat:
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TgsIOHandler::jumpToNextImage()
|
|
{
|
|
if (frameCount) {
|
|
finishRendering();
|
|
render(currentFrame + 1);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TgsIOHandler::jumpToImage(int imageNumber)
|
|
{
|
|
if (frameCount) {
|
|
if (imageNumber != currentFrame) {
|
|
finishRendering();
|
|
render(imageNumber);
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int TgsIOHandler::loopCount() const
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int TgsIOHandler::imageCount() const
|
|
{
|
|
return frameCount;
|
|
}
|
|
|
|
int TgsIOHandler::currentImageNumber() const
|
|
{
|
|
return currentFrame;
|
|
}
|
|
|
|
QRect TgsIOHandler::currentImageRect() const
|
|
{
|
|
return QRect(QPoint(), size);
|
|
}
|
|
|
|
int TgsIOHandler::nextImageDelay() const
|
|
{
|
|
return frameRate > 0 ? (int)(1000/frameRate) : 33;
|
|
}
|
|
|
|
QImageIOPlugin::Capabilities TgsIOPlugin::capabilities(QIODevice*, const QByteArray& format) const
|
|
{
|
|
return Capabilities((format == TgsIOHandler::NAME) ? CanRead : 0);
|
|
}
|
|
|
|
QImageIOHandler* TgsIOPlugin::create(QIODevice* device, const QByteArray& format) const
|
|
{
|
|
return new TgsIOHandler(device, format);
|
|
}
|