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gfx.cpp
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/**
* @file gfx.cpp
* @brief Platform-independent bitmap graphics transformation functionality
*
* (c) 2014 by Mega Limited, Auckland, New Zealand
*
* This file is part of the MEGA SDK - Client Access Engine.
*
* Applications using the MEGA API must present a valid application key
* and comply with the the rules set forth in the Terms of Service.
*
* The MEGA SDK 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.
*
* @copyright Simplified (2-clause) BSD License.
*
* You should have received a copy of the license along with this
* program.
*/
#include "mega.h"
#include "mega/gfx.h"
namespace mega {
const int GfxProc::dimensions[][2] = {
{ 200, 0 }, // THUMBNAIL: square thumbnail, cropped from near center
{ 1000, 1000 } // PREVIEW: scaled version inside 1000x1000 bounding square
};
const int GfxProc::dimensionsavatar[][2] = {
{ 250, 0 } // AVATAR250X250: square thumbnail, cropped from near center
};
bool GfxProc::isgfx(string* localfilename)
{
char ext[8];
const char* supported;
if (!(supported = supportedformats()))
{
return true;
}
if (client->fsaccess->getextension(LocalPath::fromLocalname(*localfilename), ext, sizeof ext))
{
const char* ptr;
// FIXME: use hash
if ((ptr = strstr(supported, ext)) && ptr[strlen(ext)] == '.')
{
return true;
}
}
return false;
}
bool GfxProc::isvideo(string *localfilename)
{
char ext[8];
const char* supported;
if (!(supported = supportedvideoformats()))
{
return false;
}
if (client->fsaccess->getextension(LocalPath::fromLocalname(*localfilename), ext, sizeof ext))
{
const char* ptr;
// FIXME: use hash
if ((ptr = strstr(supported, ext)) && ptr[strlen(ext)] == '.')
{
return true;
}
}
return false;
}
const char* GfxProc::supportedformats()
{
return NULL;
}
const char* GfxProc::supportedvideoformats()
{
return NULL;
}
void *GfxProc::threadEntryPoint(void *param)
{
GfxProc* gfxProcessor = (GfxProc*)param;
gfxProcessor->loop();
return NULL;
}
void GfxProc::loop()
{
GfxJob *job = NULL;
while (!finished)
{
waiter.init(NEVER);
waiter.wait();
while ((job = requests.pop()))
{
if (finished)
{
delete job;
break;
}
mutex.lock();
LOG_debug << "Processing media file: " << job->h;
// (this assumes that the width of the largest dimension is max)
if (readbitmap(NULL, &job->localfilename, dimensions[sizeof dimensions/sizeof dimensions[0]-1][0]))
{
for (unsigned i = 0; i < job->imagetypes.size(); i++)
{
// successively downscale the original image
string* jpeg = new string();
int w = dimensions[job->imagetypes[i]][0];
int h = dimensions[job->imagetypes[i]][1];
if (this->w < w && this->h < h)
{
LOG_debug << "Skipping upsizing of preview or thumbnail";
w = this->w;
h = this->h;
}
if (!resizebitmap(w, h, jpeg))
{
delete jpeg;
jpeg = NULL;
}
job->images.push_back(jpeg);
}
freebitmap();
}
else
{
for (unsigned i = 0; i < job->imagetypes.size(); i++)
{
job->images.push_back(NULL);
}
}
mutex.unlock();
responses.push(job);
client->waiter->notify();
}
}
while ((job = requests.pop()))
{
delete job;
}
while ((job = responses.pop()))
{
for (unsigned i = 0; i < job->imagetypes.size(); i++)
{
delete job->images[i];
}
delete job;
}
}
int GfxProc::checkevents(Waiter *)
{
if (!client)
{
return 0;
}
GfxJob *job = NULL;
bool needexec = false;
while ((job = responses.pop()))
{
for (unsigned i = 0; i < job->images.size(); i++)
{
if (job->images[i])
{
LOG_debug << "Media file correctly processed. Attaching file attribute: " << job->h;
// store the file attribute data - it will be attached to the file
// immediately if the upload has already completed; otherwise, once
// the upload completes
mCheckEventsKey.setkey(job->key);
int creqtag = client->reqtag;
client->reqtag = 0;
client->putfa(job->h, job->imagetypes[i], &mCheckEventsKey, std::unique_ptr<string>(job->images[i]), job->flag);
client->reqtag = creqtag;
}
else
{
LOG_debug << "Unable to process media file: " << job->h;
Transfer *transfer = NULL;
handletransfer_map::iterator htit = client->faputcompletion.find(job->h);
if (htit != client->faputcompletion.end())
{
transfer = htit->second;
}
else
{
// check if the failed attribute belongs to an active upload
for (transfer_map::iterator it = client->transfers[PUT].begin(); it != client->transfers[PUT].end(); it++)
{
if (it->second->uploadhandle == job->h)
{
transfer = it->second;
break;
}
}
}
if (transfer)
{
// reduce the number of required attributes to let the upload continue
transfer->minfa--;
client->checkfacompletion(job->h);
}
else
{
LOG_debug << "Transfer related to media file not found: " << job->h;
}
}
needexec = true;
}
delete job;
}
return needexec ? Waiter::NEEDEXEC : 0;
}
void GfxProc::transform(int& w, int& h, int& rw, int& rh, int& px, int& py)
{
if (rh)
{
// rectangular rw*rh bounding box
if (h*rw > w*rh)
{
w = w * rh / h;
h = rh;
}
else
{
h = h * rw / w;
w = rw;
}
px = 0;
py = 0;
rw = w;
rh = h;
}
else
{
// square rw*rw crop thumbnail
if (w < h)
{
h = h * rw / w;
w = rw;
}
else
{
w = w * rw / h;
h = rw;
}
px = (w - rw) / 2;
py = (h - rw) / 3;
rh = rw;
}
}
// load bitmap image, generate all designated sizes, attach to specified upload/node handle
// FIXME: move to a worker thread to keep the engine nonblocking
int GfxProc::gendimensionsputfa(FileAccess* /*fa*/, string* localfilename, handle th, SymmCipher* key, int missing, bool checkAccess)
{
if (SimpleLogger::logCurrentLevel >= logDebug)
{
string utf8path;
client->fsaccess->local2path(localfilename, &utf8path);
LOG_debug << "Creating thumb/preview for " << utf8path;
}
GfxJob *job = new GfxJob();
job->h = th;
job->flag = checkAccess;
memcpy(job->key, key->key, SymmCipher::KEYLENGTH);
job->localfilename = *localfilename;
for (fatype i = sizeof dimensions/sizeof dimensions[0]; i--; )
{
if (missing & (1 << i))
{
job->imagetypes.push_back(i);
}
}
if (!job->imagetypes.size())
{
delete job;
return 0;
}
requests.push(job);
waiter.notify();
return int(job->imagetypes.size());
}
bool GfxProc::savefa(string *localfilepath, int width, int height, string *localdstpath)
{
if (!isgfx(localfilepath))
{
return false;
}
mutex.lock();
if (!readbitmap(NULL, localfilepath, width > height ? width : height))
{
mutex.unlock();
return false;
}
int w = width;
int h = height;
if (this->w < w && this->h < h)
{
LOG_debug << "Skipping upsizing of local preview";
w = this->w;
h = this->h;
}
string jpeg;
bool success = resizebitmap(w, h, &jpeg);
freebitmap();
mutex.unlock();
if (!success)
{
return false;
}
auto f = client->fsaccess->newfileaccess();
auto localpath = LocalPath::fromLocalname(*localdstpath);
client->fsaccess->unlinklocal(localpath);
if (!f->fopen(localpath, false, true))
{
return false;
}
if (!f->fwrite((const byte*)jpeg.data(), unsigned(jpeg.size()), 0))
{
return false;
}
return true;
}
GfxProc::GfxProc()
{
client = NULL;
finished = false;
}
void GfxProc::startProcessingThread()
{
thread.start(threadEntryPoint, this);
threadstarted = true;
}
GfxProc::~GfxProc()
{
finished = true;
waiter.notify();
assert(threadstarted);
if (threadstarted)
{
thread.join();
}
}
GfxJobQueue::GfxJobQueue()
{
}
void GfxJobQueue::push(GfxJob *job)
{
mutex.lock();
jobs.push_back(job);
mutex.unlock();
}
GfxJob *GfxJobQueue::pop()
{
mutex.lock();
if (jobs.empty())
{
mutex.unlock();
return NULL;
}
GfxJob *job = jobs.front();
jobs.pop_front();
mutex.unlock();
return job;
}
GfxJob::GfxJob()
{
}
} // namespace