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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
/* Globals */
fz_colorspace *colorspace;
fz_glyph_cache *glyphcache;
pdf_xref *xref;
int pagenum = 1;
int resolution = 160;
float pageWidth = 100;
float pageHeight = 100;
fz_display_list *currentPageList;
fz_rect currentMediabox;
int currentRotate;
JNIEXPORT int JNICALL
Java_com_artifex_mupdf_MuPDFCore_openFile(JNIEnv * env, jobject thiz, jstring jfilename)
{
const char *filename;
char *password = "";
int accelerate = 1;
fz_error error;
int pages;
filename = (*env)->GetStringUTFChars(env, jfilename, NULL);
if (filename == NULL)
{
LOGE("Failed to get filename");
return 0;
}
if (accelerate)
fz_accelerate();
glyphcache = fz_new_glyph_cache();
colorspace = fz_device_rgb;
LOGE("Opening document...");
error = pdf_open_xref(&xref, filename, password);
if (error)
{
LOGE("Cannot open document: '%s'\n", filename);
return 0;
}
LOGE("Loading page tree...");
error = pdf_load_page_tree(xref);
if (error)
{
LOGE("Cannot load page tree: '%s'\n", filename);
return 0;
}
pages = pdf_count_pages(xref);
LOGE("Done! %d pages", pages);
return pages;
}
JNIEXPORT void JNICALL
Java_com_artifex_mupdf_MuPDFCore_gotoPageInternal(JNIEnv *env, jobject thiz, int page)
{
float zoom;
fz_matrix ctm;
fz_bbox bbox;
fz_error error;
fz_device *dev;
pdf_page *currentPage;
/* In the event of an error, ensure we give a non-empty page */
pageWidth = 100;
pageHeight = 100;
LOGE("Goto page %d...", page);
if (currentPageList != NULL)
{
fz_free_display_list(currentPageList);
currentPageList = NULL;
}
pagenum = page;
error = pdf_load_page(¤tPage, xref, pagenum);
if (error)
return;
zoom = resolution / 72;
currentMediabox = currentPage->mediabox;
currentRotate = currentPage->rotate;
ctm = fz_translate(0, -currentMediabox.y1);
ctm = fz_concat(ctm, fz_scale(zoom, -zoom));
ctm = fz_concat(ctm, fz_rotate(currentRotate));
bbox = fz_round_rect(fz_transform_rect(ctm, currentMediabox));
pageWidth = bbox.x1-bbox.x0;
pageHeight = bbox.y1-bbox.y0;
/* Render to list */
currentPageList = fz_new_display_list();
dev = fz_new_list_device(currentPageList);
error = pdf_run_page(xref, currentPage, dev, fz_identity);
pdf_free_page(currentPage);
if (error)
LOGE("cannot make displaylist from page %d", pagenum);
fz_free_device(dev);
}
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_error error;
fz_device *dev;
float zoom;
fz_matrix ctm;
fz_bbox bbox;
fz_pixmap *pix;
float xscale, yscale;
fz_bbox rect;
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);
rect.x0 = patchX;
rect.y0 = patchY;
rect.x1 = patchX + patchW;
rect.y1 = patchY + patchH;
pix = fz_new_pixmap_with_rect_and_data(colorspace, rect, pixels);
if (currentPageList == NULL)
{
fz_clear_pixmap_with_color(pix, 0xd0);
return 0;
}
fz_clear_pixmap_with_color(pix, 0xff);
zoom = resolution / 72;
ctm = fz_translate(-currentMediabox.x0, -currentMediabox.y1);
ctm = fz_concat(ctm, fz_scale(zoom, -zoom));
ctm = fz_concat(ctm, fz_rotate(currentRotate));
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(glyphcache, pix);
#ifdef TIME_DISPLAY_LIST
{
clock_t time;
int i;
LOGE("Executing display list");
time = clock();
for (i=0; i<100;i++) {
#endif
fz_execute_display_list(currentPageList, dev, ctm, bbox);
#ifdef TIME_DISPLAY_LIST
}
time = clock() - time;
LOGE("100 renders in %d (%d per sec)", time, CLOCKS_PER_SEC);
}
#endif
fz_free_device(dev);
fz_drop_pixmap(pix);
LOGE("Rendered");
AndroidBitmap_unlockPixels(env, bitmap);
return 1;
}
JNIEXPORT void JNICALL
Java_com_artifex_mupdf_MuPDFCore_destroying(JNIEnv * env, jobject thiz)
{
fz_free_display_list(currentPageList);
currentPageList = NULL;
pdf_free_xref(xref);
xref = NULL;
fz_free_glyph_cache(glyphcache);
glyphcache = NULL;
}
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