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/*
* GraphLCD skin library
*
* cache.c - image cache
*
* This file is released under the GNU General Public License. Refer
* to the COPYING file distributed with this package.
*
*/
#include <glcdgraphics/bitmap.h>
#include <glcdgraphics/image.h>
#include <glcdgraphics/glcd.h>
#include <glcdgraphics/pbm.h>
#include <glcdgraphics/extformats.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "cache.h"
#include "skin.h"
namespace GLCD
{
cImageItem::cImageItem(const std::string & path, cImage * image, uint16_t scalew, uint16_t scaleh)
: path(path),
counter(0),
image(image),
scale_width(scalew),
scale_height(scaleh)
{
}
cImageItem::~cImageItem()
{
delete image;
}
cImageCache::cImageCache(cSkin * Parent, int Size)
: skin(Parent),
size(Size)
{
}
cImageCache::~cImageCache()
{
Clear();
}
void cImageCache::Clear(void)
{
for (unsigned int i = 0; i < images.size(); i++)
{
delete images[i];
}
images.clear();
failedpaths.clear();
}
cImage * cImageCache::Get(const std::string & path, uint16_t & scalew, uint16_t & scaleh)
{
std::vector <cImageItem *>::iterator it;
cImageItem * item;
uint64_t maxCounter;
std::vector <cImageItem *>::iterator oldest;
// test if this path has already been stored as invalid path / invalid/non-existent image
for (size_t i = 0; i < failedpaths.size(); i++) {
if (failedpaths[i] == path) {
return NULL;
}
}
maxCounter = 0;
item = NULL;
for (it = images.begin(); it != images.end(); it++)
{
uint16_t scw = 0, sch = 0;
(*it)->ScalingGeometry(scw, sch);
if (item == NULL && path == (*it)->Path() && ( (scw == 0 && sch == 0 && ! (scalew || scaleh)) || (scw == scalew && sch == scaleh)))
{
(*it)->ResetCounter();
item = (*it);
}
else
{
(*it)->IncCounter();
if ((*it)->Counter() > maxCounter)
{
maxCounter = (*it)->Counter();
oldest = it;
}
}
}
if (item)
{
return item->Image();
}
item = LoadImage(path, scalew, scaleh);
if (item)
{
syslog(LOG_INFO, "INFO: graphlcd: successfully loaded image '%s'\n", path.c_str());
if (images.size() == size)
{
images.erase(oldest);
}
images.push_back(item);
return item->Image();
} else {
failedpaths.push_back(path);
}
return NULL;
}
cImageItem * cImageCache::LoadImage(const std::string & path, uint16_t scalew, uint16_t scaleh)
{
//fprintf(stderr, "### loading image %s\n", path.c_str());
cImageItem * item;
cImage * image;
char str[8];
int i;
int j;
std::string file;
i = path.length() - 1;
j = 0;
while (i >= 0 && j < 6)
{
if (path[i] == '.')
break;
i--;
j++;
}
i++;
j = 0;
while (i < (int) path.length())
{
str[j] = toupper((unsigned) path[i]);
i++;
j++;
}
str[j] = 0;
image = new cImage();
if (!image)
return NULL;
if (path[0] == '/' || path.find("./") == 0 || path.find("../") == 0)
file = path;
else
{
file = skin->Config().SkinPath();
if (file.length() > 0)
{
if (file[file.length() - 1] != '/')
file += '/';
}
file += path;
}
cImageFile* imgFile = NULL;
if (strcmp(str, "PBM") == 0) {
imgFile = new cPBMFile();
} else if (strcmp(str, "GLCD") == 0) {
imgFile = new cGLCDFile();
} else {
imgFile = new cExtFormatFile();
}
uint16_t scale_width = scalew;
uint16_t scale_height = scaleh;
// scale_width and scale_height are set to 0 if image was NOT scaled
if (!imgFile || (imgFile->LoadScaled(*image, file, scalew /*scale_width*/, scaleh /*scale_height*/) == false) ) {
delete image;
if (imgFile) delete imgFile;
return NULL;
}
delete imgFile;
#if 0
if (strcmp(str, "PBM") == 0)
{
cPBMFile pbm;
if (pbm.Load(*image, file) == false)
{
delete image;
return NULL;
}
}
else if (strcmp(str, "GLCD") == 0)
{
cGLCDFile glcd;
if (glcd.Load(*image, file) == false)
{
delete image;
return NULL;
}
}
else
{
cExtFormatFile extformat;
if (extformat.Load(*image, file) == false)
{
delete image;
return NULL;
}
}
#endif
item = new cImageItem(path, image, scale_width, scale_height);
if (!item)
{
delete image;
return NULL;
}
return item;
}
} // end of namespace
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