1 /*
2 * Copyright 2021 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include <jni.h>
9
10 #include "include/core/SkImage.h"
11 #include "include/core/SkM44.h"
12 #include "include/core/SkTileMode.h"
13 #include "modules/androidkit/src/Utils.h"
14
15 namespace {
16
Image_Create(JNIEnv * env,jobject,jbyteArray jdata)17 jlong Image_Create(JNIEnv* env, jobject, jbyteArray jdata) {
18 auto size = env->GetArrayLength(jdata);
19 auto* data = env->GetByteArrayElements(jdata, nullptr);
20 auto image = SkImage::MakeFromEncoded(SkData::MakeWithCopy(data, SkToSizeT(size)));
21
22 env->ReleaseByteArrayElements(jdata, data, 0);
23
24 return reinterpret_cast<jlong>(image.release());
25 }
26
Image_Release(JNIEnv *,jobject,jlong native_instance)27 void Image_Release(JNIEnv*, jobject, jlong native_instance) {
28 SkSafeUnref(reinterpret_cast<const SkImage*>(native_instance));
29 }
30
Image_GetWidth(JNIEnv *,jobject,jlong native_instance)31 jint Image_GetWidth(JNIEnv*, jobject, jlong native_instance) {
32 const auto* image = reinterpret_cast<const SkImage*>(native_instance);
33 return image ? image->width() : 0;
34 }
35
Image_GetHeight(JNIEnv *,jobject,jlong native_instance)36 jint Image_GetHeight(JNIEnv*, jobject, jlong native_instance) {
37 const auto* image = reinterpret_cast<const SkImage*>(native_instance);
38 return image ? image->height() : 0;
39 }
40
Image_MakeShader(JNIEnv *,jobject,jlong native_instance,jint jtmx,jint jtmy,jint sampling_desc,jfloat sampling_b,jfloat sampling_c,jlong native_matrix)41 jlong Image_MakeShader(JNIEnv*, jobject, jlong native_instance, jint jtmx, jint jtmy,
42 jint sampling_desc, jfloat sampling_b, jfloat sampling_c,
43 jlong native_matrix) {
44 sk_sp<SkShader> shader;
45
46 if (const auto* image = reinterpret_cast<const SkImage*>(native_instance)) {
47 const auto tmx = androidkit::utils::TileMode(jtmx),
48 tmy = androidkit::utils::TileMode(jtmy);
49 const auto sampling = androidkit::utils::SamplingOptions(sampling_desc,
50 sampling_b, sampling_c);
51
52 const auto* lm = reinterpret_cast<const SkM44*>(native_matrix);
53 shader = lm
54 ? image->makeShader(tmx, tmy, sampling, lm->asM33())
55 : image->makeShader(tmx, tmy, sampling);
56 }
57
58 return reinterpret_cast<jlong>(shader.release());
59 }
60
61 } // namespace
62
register_androidkit_Image(JNIEnv * env)63 int register_androidkit_Image(JNIEnv* env) {
64 static const JNINativeMethod methods[] = {
65 {"nCreate" , "([B)J" , reinterpret_cast<void*>(Image_Create) },
66 {"nRelease" , "(J)V" , reinterpret_cast<void*>(Image_Release) },
67
68 {"nGetWidth" , "(J)I" , reinterpret_cast<void*>(Image_GetWidth) },
69 {"nGetHeight" , "(J)I" , reinterpret_cast<void*>(Image_GetHeight)},
70
71 {"nMakeShader", "(JIIIFFJ)J" , reinterpret_cast<void*>(Image_MakeShader)},
72 };
73
74 const auto clazz = env->FindClass("org/skia/androidkit/Image");
75 return clazz
76 ? env->RegisterNatives(clazz, methods, SK_ARRAY_COUNT(methods))
77 : JNI_ERR;
78 }
79