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/SkData.h"
11 #include "include/core/SkImage.h"
12 #include "include/core/SkM44.h"
13 #include "include/core/SkRefCnt.h"
14 #include "include/core/SkShader.h"
15 #include "include/core/SkTileMode.h"
16 #include "include/private/base/SkTo.h"
17 #include "modules/jetski/src/Utils.h"
18
19 namespace {
20
Image_Create(JNIEnv * env,jobject,jbyteArray jdata)21 jlong Image_Create(JNIEnv* env, jobject, jbyteArray jdata) {
22 auto size = env->GetArrayLength(jdata);
23 auto* data = env->GetByteArrayElements(jdata, nullptr);
24 auto image = SkImages::DeferredFromEncodedData(SkData::MakeWithCopy(data, SkToSizeT(size)));
25
26 env->ReleaseByteArrayElements(jdata, data, 0);
27
28 return reinterpret_cast<jlong>(image.release());
29 }
30
Image_Release(JNIEnv *,jobject,jlong native_instance)31 void Image_Release(JNIEnv*, jobject, jlong native_instance) {
32 SkSafeUnref(reinterpret_cast<const SkImage*>(native_instance));
33 }
34
Image_GetWidth(JNIEnv *,jobject,jlong native_instance)35 jint Image_GetWidth(JNIEnv*, jobject, jlong native_instance) {
36 const auto* image = reinterpret_cast<const SkImage*>(native_instance);
37 return image ? image->width() : 0;
38 }
39
Image_GetHeight(JNIEnv *,jobject,jlong native_instance)40 jint Image_GetHeight(JNIEnv*, jobject, jlong native_instance) {
41 const auto* image = reinterpret_cast<const SkImage*>(native_instance);
42 return image ? image->height() : 0;
43 }
44
Image_MakeShader(JNIEnv *,jobject,jlong native_instance,jint jtmx,jint jtmy,jint sampling_desc,jfloat sampling_b,jfloat sampling_c,jlong native_matrix)45 jlong Image_MakeShader(JNIEnv*, jobject, jlong native_instance, jint jtmx, jint jtmy,
46 jint sampling_desc, jfloat sampling_b, jfloat sampling_c,
47 jlong native_matrix) {
48 sk_sp<SkShader> shader;
49
50 if (const auto* image = reinterpret_cast<const SkImage*>(native_instance)) {
51 const auto tmx = jetski::utils::TileMode(jtmx),
52 tmy = jetski::utils::TileMode(jtmy);
53 const auto sampling = jetski::utils::SamplingOptions(sampling_desc,
54 sampling_b, sampling_c);
55
56 const auto* lm = reinterpret_cast<const SkM44*>(native_matrix);
57 shader = lm
58 ? image->makeShader(tmx, tmy, sampling, lm->asM33())
59 : image->makeShader(tmx, tmy, sampling);
60 }
61
62 return reinterpret_cast<jlong>(shader.release());
63 }
64
65 } // namespace
66
register_jetski_Image(JNIEnv * env)67 int register_jetski_Image(JNIEnv* env) {
68 static const JNINativeMethod methods[] = {
69 {"nCreate" , "([B)J" , reinterpret_cast<void*>(Image_Create) },
70 {"nRelease" , "(J)V" , reinterpret_cast<void*>(Image_Release) },
71
72 {"nGetWidth" , "(J)I" , reinterpret_cast<void*>(Image_GetWidth) },
73 {"nGetHeight" , "(J)I" , reinterpret_cast<void*>(Image_GetHeight)},
74
75 {"nMakeShader", "(JIIIFFJ)J" , reinterpret_cast<void*>(Image_MakeShader)},
76 };
77
78 const auto clazz = env->FindClass("org/skia/jetski/Image");
79 return clazz
80 ? env->RegisterNatives(clazz, methods, std::size(methods))
81 : JNI_ERR;
82 }
83