Added JPEG support

1 files changed, 49 insertions, 2 deletions

diff --git a/libcore/imageloader.h b/libcore/imageloader.h
index 6caf19f..e90f459 100644
--- a/libcore/imageloader.h
+++ b/libcore/imageloader.h
@@ -1,10 +1,10 @@
 #ifndef __NOPACITY_IMAGELOADER_H
 #define __NOPACITY_IMAGELOADER_H
 
-#define X_DISPLAY_MISSING
-
 #include <cairo.h>
 #include <librsvg/rsvg.h>
+#include <jpeglib.h>
+#include <setjmp.h>
 #include <vdr/osd.h>
 #include <vdr/tools.h>
 
@@ -44,6 +44,53 @@ private:
     RsvgHandle *handle;
 };
 
+// Image importer for JPG
+
+#if BITS_IN_JSAMPLE != 8
+  #error libjpeg-turbo has to be compiled with 8-bit samples!
+#endif
+#ifndef JCS_EXTENSIONS
+  #error libjpeg-turbo with JCS_EXTENSIONS required!
+#endif
+
+struct my_error_mgr {
+  struct jpeg_error_mgr pub; // "public" fields
+  jmp_buf setjmp_buffer;     // for return to caller
+};
+
+METHODDEF(void)
+my_error_exit(j_common_ptr cinfo) {
+    // cinfo->err really points to a my_error_mgr struct, so coerce pointer
+    my_error_mgr *myerr = (my_error_mgr*) cinfo->err;
+
+    // Always display the message.
+    // We could postpone this until after returning, if we chose.
+    (*cinfo->err->output_message) (cinfo);
+
+    // Return control to the setjmp point
+    longjmp(myerr->setjmp_buffer, 1);
+}
+
+METHODDEF(void)
+my_output_message(j_common_ptr cinfo) {
+    char buf[JMSG_LENGTH_MAX];
+    cinfo->err->format_message(cinfo, buf);
+    dsyslog("skindesigner: libjpeg error: %s", buf);
+}
+
+class cImageImporterJPG : public cImageImporter {
+public:
+    cImageImporterJPG();
+    ~cImageImporterJPG();
+    bool LoadImage(const char *path);
+    void DrawToCairo(cairo_t *cr);
+    void GetImageSize(int &width, int &height);
+private:
+    j_decompress_ptr cinfo;
+    FILE *infile;
+};
+
+
 
 class cImageLoader {
 private: