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Code Issues Releases Wiki Activity

Improved Epaper QR code generation

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This commit is contained in:
Ralf Ramsauer 2015-05-21 13:56:20 +02:00
parent e6cba90b37
commit c37f66ff91
2 changed files with 8 additions and 3 deletions
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2
doorlockd/config.h.in
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@ -17,4 +17,6 @@
#define DEFAULT_LOG_FILE "/var/log/doorlockd.log" #define DEFAULT_LOG_FILE "/var/log/doorlockd.log"
#define DEFAULT_PID_FILE "/var/run/doorlockd.pid" #define DEFAULT_PID_FILE "/var/run/doorlockd.pid"
#define TEMPLATE_LOCATION "@CMAKE_INSTALL_PREFIX@/share/doorlockd/template.png"
#endif #endif

9
doorlockd/epaper.cpp
View File

@ -10,6 +10,7 @@ extern "C" {
} }
#include "epaper.h" #include "epaper.h"
#include "config.h"
using namespace std; using namespace std;
@ -34,10 +35,12 @@ Epaper &Epaper::get()
void Epaper::draw(const string &uri) void Epaper::draw(const string &uri)
{ {
unsigned char buffer[_ARRAY_SIZE]; unsigned char buffer[_ARRAY_SIZE];
snprintf((char*)buffer, _ARRAY_SIZE, "qrencode -l M -d 100 -s 5 \"%s\" -o /tmp/qr.png", uri.c_str()); snprintf((char*)buffer, _ARRAY_SIZE,
system((char*)buffer); "qrencode -l M -d 100 -s 5 \"%s\" -t png -o -"
"| composite -geometry +90+0 /dev/stdin " TEMPLATE_LOCATION " -colorspace gray -depth 1 gray:-",
uri.c_str());
FILE* f = popen("composite -geometry +90+0 /tmp/qr.png /usr/local/share/doorlockd/template.png -colorspace gray -depth 1 gray:-", "r"); FILE* f = popen((const char*)buffer, "r");
int i = fread(buffer, _ARRAY_SIZE, 1, f); int i = fread(buffer, _ARRAY_SIZE, 1, f);
if (i != 1) if (i != 1)
{ {