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