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Integrating android support.

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This commit is contained in:
Pere Pujal i Carabantes 2016-03-13 00:39:15 +01:00
parent 51f2e90c7d
commit d38b4abd68
8 changed files with 822 additions and 93 deletions
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src/android_print.c Normal file
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/* android_print.cpp */
/* printing support for Tux Paint */
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(See COPYING.txt)
*/
// Based on JNI and PrintHelper class
// https://developer.android.com/reference/android/support/v4/print/PrintHelper.html
// https://developer.android.com/training/printing/photos.html
#include "android_print.h"
#include "jni.h"
// Since Print work is based on Java PrintHelper class, which may not be supported on some old versions
int IsPrinterAvailable( void )
{
JNIEnv *mEnv = Android_JNI_GetEnv();
jclass mPrintHelperClass = (*mEnv)->FindClass(mEnv, "android/support/v4/print/PrintHelper");
if (mPrintHelperClass == NULL)
return 0;
jmethodID mSupportMethod = (*mEnv)->GetStaticMethodID(mEnv, mPrintHelperClass, "systemSupportsPrint", "()Z");
jboolean support = (*mEnv)->CallStaticBooleanMethod(mEnv, mPrintHelperClass, mSupportMethod);
return support ? 1 : 0;
}
// This function is based on
// (1) convert surface to Java BitMap object
// (2) call Java PrintHelper to do print job.
const char *SurfacePrint(SDL_Surface *surface)
{
JNIEnv *mEnv = Android_JNI_GetEnv();
jclass mBitmapClass = (*mEnv)->FindClass(mEnv, "android/graphics/Bitmap");
jmethodID mCreateMethod = (*mEnv)->GetStaticMethodID(mEnv, mBitmapClass, "createBitmap", "([IIILandroid/graphics/Bitmap$Config;)Landroid/graphics/Bitmap;");
jintArray mSurfaceArray = (*mEnv)->NewIntArray(mEnv, surface->w * surface->h);
(*mEnv)->SetIntArrayRegion(mEnv,mSurfaceArray, 0, surface->w * surface->h, surface->pixels);
jclass mConfigClass = (*mEnv)->FindClass(mEnv, "android/graphics/Bitmap$Config");
jfieldID mConfigField = (*mEnv)->GetStaticFieldID(mEnv, mConfigClass , "ARGB_8888", "Landroid/graphics/Bitmap$Config;");
jobject mConfig = (*mEnv)->GetStaticObjectField(mEnv, mConfigClass, mConfigField);
jobject mBitMap = (*mEnv)->CallStaticObjectMethod(mEnv, mBitmapClass, mCreateMethod, mSurfaceArray, surface->w, surface->h, mConfig);
jobject mContext = (jobject)SDL_AndroidGetActivity();
jclass mPrintClass = (*mEnv)->FindClass(mEnv, "android/support/v4/print/PrintHelper");
// sometimes android v4 support library may be not ready
if (mPrintClass == NULL)
return "There is no android v4 support library.";
jmethodID mInitMethod = (*mEnv)->GetMethodID(mEnv, mPrintClass, "<init>", "(Landroid/content/Context;)V");
jobject mPrint = (*mEnv)->NewObject(mEnv, mPrintClass, mInitMethod, mContext);
jmethodID mPrintMethod = (*mEnv)->GetMethodID(mEnv, mPrintClass, "printBitmap", "(Ljava/lang/String;Landroid/graphics/Bitmap;)V");
jstring mString = (*mEnv)->NewStringUTF(mEnv, "TuxPaint");
(*mEnv)->CallVoidMethod(mEnv, mPrint, mPrintMethod, mString, mBitMap);
// clean up
(*mEnv)->DeleteLocalRef(mEnv, mSurfaceArray);
(*mEnv)->DeleteLocalRef(mEnv, mConfig);
(*mEnv)->DeleteLocalRef(mEnv, mPrint);
(*mEnv)->DeleteLocalRef(mEnv, mString);
return NULL;
}