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comparison mupdf-source/platform/java/jni/android/androiddrawdevice.c @ 3:2c135c81b16c

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MERGE: upstream PyMuPDF 1.26.4 with MuPDF 1.26.7
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:44:09 +0200
parents b50eed0cc0ef
children
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0:6015a75abc2d 3:2c135c81b16c
1 // Copyright (C) 2004-2021 Artifex Software, Inc.
2 //
3 // This file is part of MuPDF.
4 //
5 // MuPDF is free software: you can redistribute it and/or modify it under the
6 // terms of the GNU Affero General Public License as published by the Free
7 // Software Foundation, either version 3 of the License, or (at your option)
8 // any later version.
9 //
10 // MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12 // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
13 // details.
14 //
15 // You should have received a copy of the GNU Affero General Public License
16 // along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
17 //
18 // Alternative licensing terms are available from the licensor.
19 // For commercial licensing, see <https://www.artifex.com/> or contact
20 // Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
21 // CA 94129, USA, for further information.
22
23 /* AndroidDrawDevice interface */
24
25 static jlong
26 newNativeAndroidDrawDevice(JNIEnv *env, jobject self, fz_context *ctx, jobject obj, jint width, jint height, NativeDeviceLockFn *lock, NativeDeviceUnlockFn *unlock, jint xOrigin, jint yOrigin, jint patchX0, jint patchY0, jint patchX1, jint patchY1, jboolean clear)
27 {
28 fz_device *device = NULL;
29 fz_pixmap *pixmap = NULL;
30 unsigned char dummy;
31 NativeDeviceInfo *ninfo = NULL;
32 NativeDeviceInfo *info;
33 fz_irect bbox;
34 int err = 0;
35
36 if (!ctx) return 0;
37
38 /* Ensure patch fits inside bitmap. */
39 if (patchX0 < 0) patchX0 = 0;
40 if (patchY0 < 0) patchY0 = 0;
41 if (patchX1 > width) patchX1 = width;
42 if (patchY1 > height) patchY1 = height;
43
44 bbox.x0 = xOrigin + patchX0;
45 bbox.y0 = yOrigin + patchY0;
46 bbox.x1 = xOrigin + patchX1;
47 bbox.y1 = yOrigin + patchY1;
48
49 fz_var(pixmap);
50 fz_var(ninfo);
51
52 fz_try(ctx)
53 {
54 pixmap = fz_new_pixmap_with_bbox_and_data(ctx, fz_device_rgb(ctx), bbox, NULL, 1, &dummy);
55 pixmap->stride = width * sizeof(int32_t);
56 ninfo = Memento_label(fz_malloc(ctx, sizeof(*ninfo)), "newNativeAndroidDrawDevice");
57 ninfo->pixmap = pixmap;
58 ninfo->lock = lock;
59 ninfo->unlock = unlock;
60 ninfo->xOffset = patchX0;
61 ninfo->yOffset = patchY0;
62 ninfo->width = width;
63 ninfo->height = height;
64 ninfo->object = obj;
65 (*env)->SetLongField(env, self, fid_NativeDevice_nativeInfo, jlong_cast(ninfo));
66 (*env)->SetObjectField(env, self, fid_NativeDevice_nativeResource, obj);
67 if (clear)
68 {
69 info = lockNativeDevice(env,self,&err);
70 if (!err)
71 {
72 fz_clear_pixmap_with_value(ctx, pixmap, 0xff);
73 unlockNativeDevice(env,ninfo);
74 }
75 }
76 if (!err)
77 device = fz_new_draw_device(ctx, fz_identity, pixmap);
78 }
79 fz_catch(ctx)
80 {
81 (*env)->SetLongField(env, self, fid_NativeDevice_nativeInfo, 0);
82 (*env)->SetObjectField(env, self, fid_NativeDevice_nativeResource, NULL);
83 fz_drop_pixmap(ctx, pixmap);
84 fz_free(ctx, ninfo);
85 jni_rethrow(env, ctx);
86 }
87
88 /* lockNativeDevice will already have raised a JNI error if there was one. */
89 if (err)
90 {
91 jthrowable t = (*env)->ExceptionOccurred(env);
92 (*env)->ExceptionClear(env);
93 (*env)->SetLongField(env, self, fid_NativeDevice_nativeInfo, 0);
94 (*env)->SetObjectField(env, self, fid_NativeDevice_nativeResource, NULL);
95 fz_drop_pixmap(ctx, pixmap);
96 fz_free(ctx, ninfo);
97 if ((*env)->Throw(env, t) < 0)
98 (*env)->ThrowNew(env, cls_RuntimeException, "could not rethrow exception after cleanup when locking failed");
99 return 0;
100 }
101
102 return jlong_cast(device);
103 }
104
105 static int androidDrawDevice_lock(JNIEnv *env, NativeDeviceInfo *info)
106 {
107 uint8_t *pixels;
108 int ret;
109 int phase = 0;
110 fz_context *ctx = get_context(env);
111 size_t size = info->width * info->height * 4;
112
113 if (!ctx)
114 {
115 jni_throw_run_imp(env, "no context in DrawDevice call");
116 return 1;
117 }
118
119 assert(info);
120 assert(info->object);
121
122 while (1)
123 {
124 ret = AndroidBitmap_lockPixels(env, info->object, (void **)&pixels);
125 if (ret == ANDROID_BITMAP_RESULT_SUCCESS)
126 break;
127 if (!fz_store_scavenge_external(ctx, size, &phase))
128 break; /* Failed to free any */
129 }
130 if (ret != ANDROID_BITMAP_RESULT_SUCCESS)
131 {
132 info->pixmap->samples = NULL;
133 jni_throw_run_imp(env, "bitmap lock failed in DrawDevice call");
134 return 1;
135 }
136
137 /* Now offset pixels to allow for the page offsets */
138 pixels += sizeof(int32_t) * (info->xOffset + info->width * info->yOffset);
139
140 info->pixmap->samples = pixels;
141
142 return 0;
143 }
144
145 static void androidDrawDevice_unlock(JNIEnv *env, NativeDeviceInfo *info)
146 {
147 assert(info);
148 assert(info->object);
149
150 info->pixmap->samples = NULL;
151 if (AndroidBitmap_unlockPixels(env, info->object) != ANDROID_BITMAP_RESULT_SUCCESS)
152 jni_throw_run_void(env, "bitmap unlock failed in DrawDevice call");
153 }
154
155 JNIEXPORT void JNICALL
156 FUN(android_AndroidDrawDevice_invertLuminance)(JNIEnv *env, jobject self)
157 {
158 fz_context *ctx = get_context(env);
159 fz_device *dev = from_Device(env, self);
160 NativeDeviceInfo *info;
161 int err;
162
163 if (!ctx || !dev) return;
164
165 info = lockNativeDevice(env, self, &err);
166 if (err)
167 return;
168
169 fz_try(ctx)
170 fz_invert_pixmap_luminance(ctx, info->pixmap);
171 fz_always(ctx)
172 unlockNativeDevice(env, info);
173 fz_catch(ctx)
174 jni_rethrow_void(env, ctx);
175 }
176
177 JNIEXPORT jlong JNICALL
178 FUN(android_AndroidDrawDevice_newNative)(JNIEnv *env, jclass self, jobject jbitmap, jint xOrigin, jint yOrigin, jint pX0, jint pY0, jint pX1, jint pY1, jboolean clear)
179 {
180 fz_context *ctx = get_context(env);
181 AndroidBitmapInfo info;
182 jlong device = 0;
183 int ret;
184
185 if (!ctx) return 0;
186 if (!jbitmap) jni_throw_arg(env, "bitmap must not be null");
187
188 if ((ret = AndroidBitmap_getInfo(env, jbitmap, &info)) != ANDROID_BITMAP_RESULT_SUCCESS)
189 jni_throw_run(env, "new DrawDevice failed to get bitmap info");
190 if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888)
191 jni_throw_run(env, "new DrawDevice failed as bitmap format is not RGBA_8888");
192 if (info.stride != info.width * 4)
193 jni_throw_run(env, "new DrawDevice failed as bitmap width != stride");
194
195 fz_try(ctx)
196 device = newNativeAndroidDrawDevice(env, self, ctx, jbitmap, info.width, info.height, androidDrawDevice_lock, androidDrawDevice_unlock, xOrigin, yOrigin, pX0, pY0, pX1, pY1, clear);
197 fz_catch(ctx)
198 jni_rethrow(env, ctx);
199
200 return device;
201 }