1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
#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_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);
fz_execute_display_list(currentPageList, dev, ctm, bbox);
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;
}
|
