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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
/* Globals */
fz_colorspace *colorspace;
fz_glyphcache *glyphcache;
pdf_xref *xref;
int pagenum = 1;
int resolution = 160;
pdf_page *currentPage;
float pageWidth = 100;
float pageHeight = 100;
JNIEXPORT int JNICALL Java_com_artifex_mupdf_PixmapView_mupdfOpenFile(JNIEnv * env, jobject thiz, jstring jfilename)
{
const char *filename;
char *password = "";
int accelerate = 1;
fz_error error;
filename = (*env)->GetStringUTFChars(env, jfilename, NULL);
if (filename == NULL)
{
LOGE("Failed to get filename");
return 0;
}
if (accelerate)
fz_accelerate();
glyphcache = fz_newglyphcache();
colorspace = fz_devicergb;
LOGE("Opening document...");
error = pdf_openxref(&xref, filename, password);
if (error)
{
LOGE("Cannot open document: '%s'\n", filename);
return 0;
}
LOGE("Loading page tree...");
error = pdf_loadpagetree(xref);
if (error)
{
LOGE("Cannot load page tree: '%s'\n", filename);
return 0;
}
LOGE("Done! %d pages", pdf_getpagecount(xref));
return pdf_getpagecount(xref);
}
JNIEXPORT void JNICALL Java_com_artifex_mupdf_PixmapView_mupdfGotoPage(
JNIEnv *env,
jobject thiz,
int page)
{
float zoom;
fz_matrix ctm;
fz_obj *pageobj;
fz_bbox bbox;
fz_error error;
/* In the event of an error, ensure we give a non-empty page */
pageWidth = 100;
pageHeight = 100;
/* Free any current page */
if (currentPage != NULL)
{
pdf_freepage(currentPage);
currentPage = NULL;
}
LOGE("Goto page %d...", page);
pagenum = page;
pageobj = pdf_getpageobject(xref, pagenum);
if (pageobj == NULL)
return;
error = pdf_loadpage(¤tPage, xref, pageobj);
if (error)
return;
zoom = resolution / 72;
ctm = fz_translate(0, -currentPage->mediabox.y1);
ctm = fz_concat(ctm, fz_scale(zoom, -zoom));
ctm = fz_concat(ctm, fz_rotate(currentPage->rotate));
bbox = fz_roundrect(fz_transformrect(ctm, currentPage->mediabox));
pageWidth = bbox.x1-bbox.x0;
pageHeight = bbox.y1-bbox.y0;
LOGE("Success [w=%g, h=%g]", pageWidth, pageHeight);
}
JNIEXPORT float JNICALL Java_com_artifex_mupdf_PixmapView_mupdfPageWidth(
JNIEnv *env,
jobject thiz)
{
LOGE("PageWidth=%g", pageWidth);
return pageWidth;
}
JNIEXPORT float JNICALL Java_com_artifex_mupdf_PixmapView_mupdfPageHeight(
JNIEnv *env,
jobject thiz)
{
LOGE("PageHeight=%g", pageHeight);
return pageHeight;
}
JNIEXPORT jboolean JNICALL Java_com_artifex_mupdf_PixmapView_mupdfDrawPage(
JNIEnv *env,
jobject thiz,
jobject bitmap,
int pageW,
int pageH,
int patchX,
int patchY,
int patchW,
int patchH)
{
AndroidBitmapInfo info;
void* pixels;
int ret, i, c;
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;
}
LOGI("render page\n");
/* Call mupdf to render page */
{
fz_error error;
fz_displaylist *list;
fz_device *dev;
/* Render to list */
LOGI("make list\n");
list = fz_newdisplaylist();
LOGI("make device\n");
dev = fz_newlistdevice(list);
LOGI("render to device\n");
error = pdf_runpage(xref, currentPage, dev, fz_identity);
if (error)
{
LOGE("cannot draw page %d", pagenum);
return 0;
}
LOGI("free device\n");
fz_freedevice(dev);
/* Render to screen */
LOGE("Rendering page=%dx%d patch=[%d,%d,%d,%d]",
pageW, pageH, patchX, patchY, patchW, patchH);
{
float zoom;
fz_matrix ctm;
fz_bbox bbox;
fz_pixmap *pix;
float xscale, yscale;
zoom = resolution / 72;
ctm = fz_translate(0, -currentPage->mediabox.y1);
ctm = fz_concat(ctm, fz_scale(zoom, -zoom));
ctm = fz_concat(ctm, fz_rotate(currentPage->rotate));
bbox = fz_roundrect(fz_transformrect(ctm,currentPage->mediabox));
LOGE("mediabox=%g %g %g %g zoom=%g rotate=%d",
currentPage->mediabox.x0,
currentPage->mediabox.y0,
currentPage->mediabox.x1,
currentPage->mediabox.y1,
zoom,
currentPage->rotate);
LOGE("ctm = [%g %g %g %g %g %g] to [%d %d %d %d]", ctm.a, ctm.b, ctm.c, ctm.d, ctm.e, ctm.f, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
/* 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_roundrect(fz_transformrect(ctm,currentPage->mediabox));
LOGE("ctm = [%g %g %g %g %g %g] to [%d %d %d %d]", ctm.a, ctm.b, ctm.c, ctm.d, ctm.e, ctm.f, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
pix = fz_newpixmapwithdata(colorspace,
patchX,
patchY,
patchW,
patchH,
pixels);
LOGE("Clearing");
fz_clearpixmapwithcolor(pix, 0xff);
LOGE("Cleared");
dev = fz_newdrawdevice(glyphcache, pix);
fz_executedisplaylist(list, dev, ctm);
fz_freedevice(dev);
fz_droppixmap(pix);
}
LOGE("Rendered");
fz_freedisplaylist(list);
}
AndroidBitmap_unlockPixels(env, bitmap);
return 1;
}
void android_log(char *err, int n)
{
LOGE(err, n);
}
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