PDF to png on Android

[douglas.paulino]

Folks
Can someone show me what api at C should I use to convert PDF to PNG? Must perform this conversion on android and am having trouble for it.
Follow my attempt:

Code: Select all

JNIEXPORT void JNICALL Java_magick_Pdf_pdfToPng
  (JNIEnv *env, jobject self)
{
	printf("Hello World!\n");
    int args_count;
    char *args[] = { "convert", "-density", "300", "/storage/emulated/0/files/pdftopng.pdf",
                     "/storage/emulated/0/files/pdftopng.png"};

    for(args_count = 0; args[args_count] != (char *)NULL; args_count++);

    ImageInfo *image_info = AcquireImageInfo();
    ExceptionInfo *exception = AcquireExceptionInfo();

    MagickBooleanType status =
       ConvertImageCommand(image_info, args_count, args, NULL, exception);

    if (exception->severity != UndefinedException)
    {
      status=MagickTrue;
      CatchException(exception);
    }

    if (status == MagickFalse)
      fprintf(stderr, "Error in call\n");

    image_info=DestroyImageInfo(image_info);
    exception=DestroyExceptionInfo(exception);

}

I need to set the density and I'm having trouble...... I'm on the correct track?

tks

[snibgo]

What trouble are you having?

[fmw42]

Please always provide your IM version and Platform.

[douglas.paulino]

IM version 6.7.3-0
Plataforma: Android

Snibgo.... I will get the log, but the APP just crash.
I am using this example: https://github.com/paulasiimwe/Android- ... master/jni
I just created a new file magick_Pdf.c and rebuild the .so file.

[douglas.paulino]

Follow the error on Android

04-19 09:06:22.734: A/DEBUG(274): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
04-19 09:06:22.735: A/DEBUG(274): Build fingerprint: 'motorola/osprey_retla_ds/osprey_uds:6.0/MPI24.65-33.1/1:user/release-keys'
04-19 09:06:22.735: A/DEBUG(274): Revision: 'p2b0'
04-19 09:06:22.735: A/DEBUG(274): ABI: 'arm'
04-19 09:06:22.735: A/DEBUG(274): pid: 20453, tid: 20453, name: teste.ndk >>> teste.ndk <<<
04-19 09:06:22.735: A/DEBUG(274): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
04-19 09:06:22.756: A/DEBUG(274): r0 be965b6c r1 00000000 r2 00001000 r3 00000000
04-19 09:06:22.756: A/DEBUG(274): r4 00001000 r5 be965b6c r6 00000000 r7 b85da824
04-19 09:06:22.756: A/DEBUG(274): r8 be96dd60 r9 00000000 sl b85d2638 fp b85d7750
04-19 09:06:22.756: A/DEBUG(274): ip be966b6b sp be965b5c lr a43fbf43 pc a4446a3a cpsr 200d0030
04-19 09:06:22.775: I/ActivityManager(2499): Start proc 20487:com.google.android.apps.plus/u0a96 for broadcast com.google.android.apps.plus/.service.PackagesMediaMonitor
04-19 09:06:22.780: A/DEBUG(274): backtrace:
04-19 09:06:22.780: A/DEBUG(274): #00 pc 000c6a3a /data/app/teste.ndk-1/lib/arm/libimagemagick.so (CopyMagickString+9)
04-19 09:06:22.780: A/DEBUG(274): #01 pc 0007bf3f /data/app/teste.ndk-1/lib/arm/libimagemagick.so (GetExceptionMessage+50)
04-19 09:06:22.780: A/DEBUG(274): #02 pc 00137673 /data/app/teste.ndk-1/lib/arm/libimagemagick.so
04-19 09:06:22.780: A/DEBUG(274): #03 pc 0005d7a3 /data/app/teste.ndk-1/lib/arm/libimagemagick.so (ReadImage+402)
04-19 09:06:22.780: A/DEBUG(274): #04 pc 0005e18b /data/app/teste.ndk-1/lib/arm/libimagemagick.so (ReadImages+246)
04-19 09:06:22.780: A/DEBUG(274): #05 pc 000d3263 /data/app/teste.ndk-1/lib/arm/libimagemagick.so (ConvertImageCommand+1694)
04-19 09:06:22.780: A/DEBUG(274): #06 pc 00045f89 /data/app/teste.ndk-1/lib/arm/libimagemagick.so (Java_magick_Pdf_pdfToPng+80)
04-19 09:06:22.780: A/DEBUG(274): #07 pc 000238bd /data/app/teste.ndk-1/oat/arm/base.odex (offset 0x13000) (void magick.Pdf.pdfToPng()+72)
04-19 09:06:22.780: A/DEBUG(274): #08 pc 00029a9b /data/app/teste.ndk-1/oat/arm/base.odex (offset 0x13000) (void teste.ndk.AndroidMagickActivity.onCreate(android.os.Bundle)+926)
04-19 09:06:22.781: A/DEBUG(274): #09 pc 02762495 /system/framework/arm/boot.oat (offset 0x1fde000)
04-19 09:06:22.813: I/AccountManagerService(2499): getTypesVisibleToCaller: isPermitted? true

[douglas.paulino]

folks, someone can guide me?