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#include <jni.h>
#include <time.h>
#include <android/log.h>
#include <android/bitmap.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "fitz.h"
#include "mupdf.h"
#define LOG_TAG "libmupdf"
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
/* Set to 1 to enable debug log traces. */
#define DEBUG 0
/* Enable to log rendering times (render each frame 100 times and time) */
#undef TIME_DISPLAY_LIST
#define MAX_SEARCH_HITS (500)
/* Globals */
fz_colorspace *colorspace;
fz_document *doc;
int pagenum = 1;
int resolution = 160;
float pageWidth = 100;
float pageHeight = 100;
fz_display_list *currentPageList;
fz_rect currentMediabox;
fz_context *ctx;
int currentPageNumber = -1;
fz_page *currentPage = NULL;
fz_bbox *hit_bbox = NULL;
JNIEXPORT int JNICALL
Java_com_artifex_mupdf_MuPDFCore_openFile(JNIEnv * env, jobject thiz, jstring jfilename)
{
const char *filename;
int pages = 0;
int result = 0;
filename = (*env)->GetStringUTFChars(env, jfilename, NULL);
if (filename == NULL)
{
LOGE("Failed to get filename");
return 0;
}
/* 128 MB store for low memory devices. Tweak as necessary. */
ctx = fz_new_context(NULL, NULL, 128 << 20);
if (!ctx)
{
LOGE("Failed to initialise context");
return 0;
}
doc = NULL;
fz_try(ctx)
{
colorspace = fz_device_rgb;
LOGE("Opening document...");
fz_try(ctx)
{
doc = fz_open_document(ctx, (char *)filename);
}
fz_catch(ctx)
{
fz_throw(ctx, "Cannot open document: '%s'\n", filename);
}
LOGE("Done!");
result = 1;
}
fz_catch(ctx)
{
LOGE("Failed: %s", ctx->error->message);
fz_close_document(doc);
doc = NULL;
fz_free_context(ctx);
ctx = NULL;
}
(*env)->ReleaseStringUTFChars(env, jfilename, filename);
return result;
}
JNIEXPORT int JNICALL
Java_com_artifex_mupdf_MuPDFCore_countPagesInternal(JNIEnv *env, jobject thiz)
{
return fz_count_pages(doc);
}
JNIEXPORT void JNICALL
Java_com_artifex_mupdf_MuPDFCore_gotoPageInternal(JNIEnv *env, jobject thiz, int page)
{
float zoom;
fz_matrix ctm;
fz_bbox bbox;
fz_device *dev = NULL;
fz_var(dev);
if (currentPage != NULL && page != currentPageNumber)
{
fz_free_page(doc, currentPage);
currentPage = NULL;
}
/* In the event of an error, ensure we give a non-empty page */
pageWidth = 100;
pageHeight = 100;
currentPageNumber = page;
LOGE("Goto page %d...", page);
fz_try(ctx)
{
if (currentPageList != NULL)
{
fz_free_display_list(ctx, currentPageList);
currentPageList = NULL;
}
pagenum = page;
currentPage = fz_load_page(doc, pagenum);
zoom = resolution / 72;
currentMediabox = fz_bound_page(doc, currentPage);
ctm = fz_scale(zoom, zoom);
bbox = fz_round_rect(fz_transform_rect(ctm, currentMediabox));
pageWidth = bbox.x1-bbox.x0;
pageHeight = bbox.y1-bbox.y0;
}
fz_catch(ctx)
{
currentPageNumber = page;
LOGE("cannot make displaylist from page %d", pagenum);
}
fz_free_device(dev);
dev = NULL;
}
JNIEXPORT float JNICALL
Java_com_artifex_mupdf_MuPDFCore_getPageWidth(JNIEnv *env, jobject thiz)
{
LOGE("PageWidth=%g", pageWidth);
return pageWidth;
}
JNIEXPORT float JNICALL
Java_com_artifex_mupdf_MuPDFCore_getPageHeight(JNIEnv *env, jobject thiz)
{
LOGE("PageHeight=%g", pageHeight);
return pageHeight;
}
JNIEXPORT jboolean JNICALL
Java_com_artifex_mupdf_MuPDFCore_drawPage(JNIEnv *env, jobject thiz, jobject bitmap,
int pageW, int pageH, int patchX, int patchY, int patchW, int patchH)
{
AndroidBitmapInfo info;
void *pixels;
int ret;
fz_device *dev = NULL;
float zoom;
fz_matrix ctm;
fz_bbox bbox;
fz_pixmap *pix = NULL;
float xscale, yscale;
fz_bbox rect;
fz_var(pix);
fz_var(dev);
LOGI("In native method\n");
if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
return 0;
}
LOGI("Checking format\n");
if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {
LOGE("Bitmap format is not RGBA_8888 !");
return 0;
}
LOGI("locking pixels\n");
if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
return 0;
}
/* Call mupdf to render display list to screen */
LOGE("Rendering page=%dx%d patch=[%d,%d,%d,%d]",
pageW, pageH, patchX, patchY, patchW, patchH);
fz_try(ctx)
{
if (currentPageList == NULL)
{
/* Render to list */
currentPageList = fz_new_display_list(ctx);
dev = fz_new_list_device(ctx, currentPageList);
fz_run_page(doc, currentPage, dev, fz_identity, NULL);
}
rect.x0 = patchX;
rect.y0 = patchY;
rect.x1 = patchX + patchW;
rect.y1 = patchY + patchH;
pix = fz_new_pixmap_with_bbox_and_data(ctx, colorspace, rect, pixels);
if (currentPageList == NULL)
{
fz_clear_pixmap_with_value(ctx, pix, 0xd0);
break;
}
fz_clear_pixmap_with_value(ctx, pix, 0xff);
zoom = resolution / 72;
ctm = fz_scale(zoom, zoom);
bbox = fz_round_rect(fz_transform_rect(ctm,currentMediabox));
/* Now, adjust ctm so that it would give the correct page width
* heights. */
xscale = (float)pageW/(float)(bbox.x1-bbox.x0);
yscale = (float)pageH/(float)(bbox.y1-bbox.y0);
ctm = fz_concat(ctm, fz_scale(xscale, yscale));
bbox = fz_round_rect(fz_transform_rect(ctm,currentMediabox));
dev = fz_new_draw_device(ctx, pix);
#ifdef TIME_DISPLAY_LIST
{
clock_t time;
int i;
LOGE("Executing display list");
time = clock();
for (i=0; i<100;i++) {
#endif
fz_run_display_list(currentPageList, dev, ctm, bbox, NULL);
#ifdef TIME_DISPLAY_LIST
}
time = clock() - time;
LOGE("100 renders in %d (%d per sec)", time, CLOCKS_PER_SEC);
}
#endif
fz_free_device(dev);
dev = NULL;
fz_drop_pixmap(ctx, pix);
LOGE("Rendered");
}
fz_catch(ctx)
{
fz_free_device(dev);
LOGE("Render failed");
}
AndroidBitmap_unlockPixels(env, bitmap);
return 1;
}
static fz_text_char textcharat(fz_text_page *page, int idx)
{
static fz_text_char emptychar = { {0,0,0,0}, ' ' };
fz_text_block *block;
fz_text_line *line;
fz_text_span *span;
int ofs = 0;
for (block = page->blocks; block < page->blocks + page->len; block++)
{
for (line = block->lines; line < block->lines + block->len; line++)
{
for (span = line->spans; span < line->spans + line->len; span++)
{
if (idx < ofs + span->len)
return span->text[idx - ofs];
/* pseudo-newline */
if (span + 1 == line->spans + line->len)
{
if (idx == ofs + span->len)
return emptychar;
ofs++;
}
ofs += span->len;
}
}
}
return emptychar;
}
static int
charat(fz_text_page *page, int idx)
{
return textcharat(page, idx).c;
}
static fz_bbox
bboxcharat(fz_text_page *page, int idx)
{
return fz_round_rect(textcharat(page, idx).bbox);
}
static int
textlen(fz_text_page *page)
{
fz_text_block *block;
fz_text_line *line;
fz_text_span *span;
int len = 0;
for (block = page->blocks; block < page->blocks + page->len; block++)
{
for (line = block->lines; line < block->lines + block->len; line++)
{
for (span = line->spans; span < line->spans + line->len; span++)
len += span->len;
len++; /* pseudo-newline */
}
}
return len;
}
static int
match(fz_text_page *page, const char *s, int n)
{
int orig = n;
int c;
while (*s) {
s += fz_chartorune(&c, (char *)s);
if (c == ' ' && charat(page, n) == ' ') {
while (charat(page, n) == ' ')
n++;
} else {
if (tolower(c) != tolower(charat(page, n)))
return 0;
n++;
}
}
return n - orig;
}
static int
countOutlineItems(fz_outline *outline)
{
int count = 0;
while (outline)
{
if (outline->dest.kind == FZ_LINK_GOTO
&& outline->dest.ld.gotor.page >= 0
&& outline->title)
count++;
count += countOutlineItems(outline->down);
outline = outline->next;
}
return count;
}
static int
fillInOutlineItems(JNIEnv * env, jclass olClass, jmethodID ctor, jobjectArray arr, int pos, fz_outline *outline, int level)
{
while (outline)
{
if (outline->dest.kind == FZ_LINK_GOTO)
{
int page = outline->dest.ld.gotor.page;
if (page >= 0 && outline->title)
{
jobject ol;
jstring title = (*env)->NewStringUTF(env, outline->title);
if (title == NULL) return -1;
ol = (*env)->NewObject(env, olClass, ctor, level, title, page);
if (ol == NULL) return -1;
(*env)->SetObjectArrayElement(env, arr, pos, ol);
(*env)->DeleteLocalRef(env, ol);
(*env)->DeleteLocalRef(env, title);
pos++;
}
}
pos = fillInOutlineItems(env, olClass, ctor, arr, pos, outline->down, level+1);
if (pos < 0) return -1;
outline = outline->next;
}
return pos;
}
JNIEXPORT jboolean JNICALL
Java_com_artifex_mupdf_MuPDFCore_needsPasswordInternal(JNIEnv * env, jobject thiz)
{
return fz_needs_password(doc) ? JNI_TRUE : JNI_FALSE;
}
JNIEXPORT jboolean JNICALL
Java_com_artifex_mupdf_MuPDFCore_authenticatePasswordInternal(JNIEnv *env, jobject thiz, jstring password)
{
const char *pw;
int result;
pw = (*env)->GetStringUTFChars(env, password, NULL);
if (pw == NULL)
return JNI_FALSE;
result = fz_authenticate_password(doc, (char *)pw);
(*env)->ReleaseStringUTFChars(env, password, pw);
return result;
}
JNIEXPORT jboolean JNICALL
Java_com_artifex_mupdf_MuPDFCore_hasOutlineInternal(JNIEnv * env, jobject thiz)
{
fz_outline *outline = fz_load_outline(doc);
return (outline == NULL) ? JNI_FALSE : JNI_TRUE;
}
JNIEXPORT jobjectArray JNICALL
Java_com_artifex_mupdf_MuPDFCore_getOutlineInternal(JNIEnv * env, jobject thiz)
{
jclass olClass;
jmethodID ctor;
jobjectArray arr;
jobject ol;
fz_outline *outline;
int nItems;
olClass = (*env)->FindClass(env, "com/artifex/mupdf/OutlineItem");
if (olClass == NULL) return NULL;
ctor = (*env)->GetMethodID(env, olClass, "<init>", "(ILjava/lang/String;I)V");
if (ctor == NULL) return NULL;
outline = fz_load_outline(doc);
nItems = countOutlineItems(outline);
arr = (*env)->NewObjectArray(env,
nItems,
olClass,
NULL);
if (arr == NULL) return NULL;
return fillInOutlineItems(env, olClass, ctor, arr, 0, outline, 0) > 0
? arr
:NULL;
}
JNIEXPORT jobjectArray JNICALL
Java_com_artifex_mupdf_MuPDFCore_searchPage(JNIEnv * env, jobject thiz, jstring jtext)
{
jclass rectClass;
jmethodID ctor;
jobjectArray arr;
jobject rect;
fz_text_sheet *sheet = NULL;
fz_text_page *text = NULL;
fz_device *dev = NULL;
float zoom;
fz_matrix ctm;
int pos;
int len;
int i, n;
int hit_count = 0;
const char *str;
rectClass = (*env)->FindClass(env, "android/graphics/RectF");
if (rectClass == NULL) return NULL;
ctor = (*env)->GetMethodID(env, rectClass, "<init>", "(FFFF)V");
if (ctor == NULL) return NULL;
str = (*env)->GetStringUTFChars(env, jtext, NULL);
if (str == NULL) return NULL;
fz_var(sheet);
fz_var(text);
fz_var(dev);
fz_try(ctx)
{
fz_rect rect;
if (hit_bbox == NULL)
hit_bbox = fz_malloc_array(ctx, MAX_SEARCH_HITS, sizeof(*hit_bbox));
zoom = resolution / 72;
ctm = fz_scale(zoom, zoom);
rect = fz_transform_rect(ctm, currentMediabox);
sheet = fz_new_text_sheet(ctx);
text = fz_new_text_page(ctx, rect);
dev = fz_new_text_device(ctx, sheet, text);
fz_run_page(doc, currentPage, dev, ctm, NULL);
fz_free_device(dev);
dev = NULL;
len = textlen(text);
for (pos = 0; pos < len; pos++)
{
fz_bbox rr = fz_empty_bbox;
n = match(text, str, pos);
for (i = 0; i < n; i++)
rr = fz_union_bbox(rr, bboxcharat(text, pos + i));
if (!fz_is_empty_bbox(rr) && hit_count < MAX_SEARCH_HITS)
hit_bbox[hit_count++] = rr;
}
}
fz_always(ctx)
{
fz_free_text_page(ctx, text);
fz_free_text_sheet(ctx, sheet);
fz_free_device(dev);
}
fz_catch(ctx)
{
jclass cls;
(*env)->ReleaseStringUTFChars(env, jtext, str);
cls = (*env)->FindClass(env, "java/lang/OutOfMemoryError");
if (cls != NULL)
(*env)->ThrowNew(env, cls, "Out of memory in MuPDFCore_searchPage");
(*env)->DeleteLocalRef(env, cls);
return NULL;
}
(*env)->ReleaseStringUTFChars(env, jtext, str);
arr = (*env)->NewObjectArray(env,
hit_count,
rectClass,
NULL);
if (arr == NULL) return NULL;
for (i = 0; i < hit_count; i++) {
rect = (*env)->NewObject(env, rectClass, ctor,
(float) (hit_bbox[i].x0),
(float) (hit_bbox[i].y0),
(float) (hit_bbox[i].x1),
(float) (hit_bbox[i].y1));
if (rect == NULL)
return NULL;
(*env)->SetObjectArrayElement(env, arr, i, rect);
(*env)->DeleteLocalRef(env, rect);
}
return arr;
}
JNIEXPORT void JNICALL
Java_com_artifex_mupdf_MuPDFCore_destroying(JNIEnv * env, jobject thiz)
{
fz_free(ctx, hit_bbox);
hit_bbox = NULL;
fz_free_display_list(ctx, currentPageList);
currentPageList = NULL;
if (currentPage != NULL)
{
fz_free_page(doc, currentPage);
currentPage = NULL;
}
fz_close_document(doc);
doc = NULL;
}
JNIEXPORT int JNICALL
Java_com_artifex_mupdf_MuPDFCore_getPageLink(JNIEnv * env, jobject thiz, int pageNumber, float x, float y)
{
fz_matrix ctm;
float zoom;
fz_link *link;
fz_point p;
Java_com_artifex_mupdf_MuPDFCore_gotoPageInternal(env, thiz, pageNumber);
if (currentPageNumber == -1 || currentPage == NULL)
return -1;
p.x = x;
p.y = y;
/* Ultimately we should probably return a pointer to a java structure
* with the link details in, but for now, page number will suffice.
*/
zoom = resolution / 72;
ctm = fz_scale(zoom, zoom);
ctm = fz_invert_matrix(ctm);
p = fz_transform_point(ctm, p);
for (link = fz_load_links(doc, currentPage); link; link = link->next)
{
if (p.x >= link->rect.x0 && p.x <= link->rect.x1)
if (p.y >= link->rect.y0 && p.y <= link->rect.y1)
break;
}
if (link == NULL)
return -1;
if (link->dest.kind == FZ_LINK_URI)
{
//gotouri(link->dest.ld.uri.uri);
return -1;
}
else if (link->dest.kind == FZ_LINK_GOTO)
return link->dest.ld.gotor.page;
return -1;
}
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