diff options
Diffstat (limited to 'android/jni/mupdf.c')
| -rw-r--r-- | android/jni/mupdf.c | 131 |
1 files changed, 129 insertions, 2 deletions
diff --git a/android/jni/mupdf.c b/android/jni/mupdf.c index ecb9f20b..a4180e54 100644 --- a/android/jni/mupdf.c +++ b/android/jni/mupdf.c @@ -13,6 +13,7 @@ #endif #include "fitz.h" +#include "fitz-internal.h" #include "mupdf.h" #define JNI_FN(A) Java_com_artifex_mupdfdemo_ ## A @@ -89,9 +90,15 @@ struct globals_s int alert_reply; pthread_cond_t alert_request_cond; pthread_cond_t alert_reply_cond; + + // For the buffer reading mode, we need to implement stream reading, which + // needs access to the following. + JNIEnv *env; + jclass thiz; }; static jfieldID global_fid; +static jfieldID buffer_fid; static void drop_page_cache(globals *glo, page_cache *pc) { @@ -225,7 +232,10 @@ static void alerts_fin(globals *glo) static globals *get_globals(JNIEnv *env, jobject thiz) { - return (globals *)(void *)((*env)->GetLongField(env, thiz, global_fid)); + globals *glo = (globals *)(void *)((*env)->GetLongField(env, thiz, global_fid)); + glo->env = env; + glo->thiz = thiz; + return glo; } JNIEXPORT jlong JNICALL @@ -281,7 +291,7 @@ JNI_FN(MuPDFCore_openFile)(JNIEnv * env, jobject thiz, jstring jfilename) } fz_catch(ctx) { - fz_throw(ctx, "Cannot open document: '%s'\n", filename); + fz_throw(ctx, "Cannot open document: '%s'", filename); } LOGE("Done!"); } @@ -301,6 +311,123 @@ JNI_FN(MuPDFCore_openFile)(JNIEnv * env, jobject thiz, jstring jfilename) return (jlong)(void *)glo; } +static int bufferStreamRead(fz_stream *stream, unsigned char *buf, int len) +{ + globals *glo = (globals *)stream->state; + JNIEnv *env = glo->env; + jbyteArray array = (jbyteArray)(void *)((*env)->GetObjectField(env, glo->thiz, buffer_fid)); + int arrayLength = (*env)->GetArrayLength(env, array); + + if (stream->pos > arrayLength) + stream->pos = arrayLength; + if (stream->pos < 0) + stream->pos = 0; + if (len + stream->pos > arrayLength) + len = arrayLength - stream->pos; + + (*env)->GetByteArrayRegion(env, array, stream->pos, len, buf); + (*env)->DeleteLocalRef(env, array); + return len; +} + +static void bufferStreamClose(fz_context *ctx, void *state) +{ + /* Nothing to do */ +} + +static void bufferStreamSeek(fz_stream *stream, int offset, int whence) +{ + globals *glo = (globals *)stream->state; + JNIEnv *env = glo->env; + jbyteArray array = (jbyteArray)(void *)((*env)->GetObjectField(env, glo->thiz, buffer_fid)); + int arrayLength = (*env)->GetArrayLength(env, array); + + (*env)->DeleteLocalRef(env, array); + + if (whence == 0) /* SEEK_SET */ + stream->pos = offset; + else if (whence == 1) /* SEEK_CUR */ + stream->pos += offset; + else if (whence == 2) /* SEEK_END */ + stream->pos = arrayLength + offset; + + if (stream->pos > arrayLength) + stream->pos = arrayLength; + if (stream->pos < 0) + stream->pos = 0; + + stream->rp = stream->bp; + stream->wp = stream->bp; +} + +JNIEXPORT jlong JNICALL +JNI_FN(MuPDFCore_openBuffer)(JNIEnv * env, jobject thiz) +{ + globals *glo; + fz_context *ctx; + jclass clazz; + fz_stream *stream; + +#ifdef NDK_PROFILER + monstartup("libmupdf.so"); +#endif + + clazz = (*env)->GetObjectClass(env, thiz); + global_fid = (*env)->GetFieldID(env, clazz, "globals", "J"); + + glo = calloc(1, sizeof(*glo)); + if (glo == NULL) + return 0; + glo->resolution = 160; + glo->alerts_initialised = 0; + glo->env = env; + glo->thiz = thiz; + buffer_fid = (*env)->GetFieldID(env, clazz, "fileBuffer", "[B"); + + /* 128 MB store for low memory devices. Tweak as necessary. */ + glo->ctx = ctx = fz_new_context(NULL, NULL, 128 << 20); + if (!ctx) + { + LOGE("Failed to initialise context"); + free(glo); + return 0; + } + + glo->doc = NULL; + fz_try(ctx) + { + stream = fz_new_stream(ctx, glo, bufferStreamRead, bufferStreamClose); + stream->seek = bufferStreamSeek; + + glo->colorspace = fz_device_rgb; + + LOGE("Opening document..."); + fz_try(ctx) + { + glo->current_path = NULL; + glo->doc = fz_open_document_with_stream(ctx, "", stream); + alerts_init(glo); + } + fz_catch(ctx) + { + fz_throw(ctx, "Cannot open memory document"); + } + LOGE("Done!"); + } + fz_catch(ctx) + { + LOGE("Failed: %s", ctx->error->message); + fz_close_document(glo->doc); + glo->doc = NULL; + fz_free_context(ctx); + glo->ctx = NULL; + free(glo); + glo = NULL; + } + + return (jlong)(void *)glo; +} + JNIEXPORT int JNICALL JNI_FN(MuPDFCore_countPagesInternal)(JNIEnv *env, jobject thiz) { |