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 "include/core/SkCanvas.h"
9 #include "include/core/SkColor.h"
10 #include "include/core/SkPaint.h"
11
12 #include <jni.h>
13
14 namespace {
15
Canvas_Save(JNIEnv * env,jobject,jlong native_instance)16 void Canvas_Save(JNIEnv* env, jobject, jlong native_instance) {
17 if (auto* canvas = reinterpret_cast<SkCanvas*>(native_instance)) {
18 canvas->save();
19 }
20 }
21
Canvas_Restore(JNIEnv * env,jobject,jlong native_instance)22 void Canvas_Restore(JNIEnv* env, jobject, jlong native_instance) {
23 if (auto* canvas = reinterpret_cast<SkCanvas*>(native_instance)) {
24 canvas->restore();
25 }
26 }
27
Canvas_Concat(JNIEnv * env,jobject,jlong native_instance,jlong native_matrix)28 void Canvas_Concat(JNIEnv* env, jobject, jlong native_instance, jlong native_matrix) {
29 auto* canvas = reinterpret_cast<SkCanvas*>(native_instance);
30 auto* matrix = reinterpret_cast<SkM44* >(native_matrix);
31
32 if (canvas && matrix) {
33 canvas->concat(*matrix);
34 }
35 }
36
Canvas_Concat16f(JNIEnv * env,jobject,jlong native_instance,jfloatArray jmatrix)37 void Canvas_Concat16f(JNIEnv* env, jobject, jlong native_instance, jfloatArray jmatrix) {
38 SkASSERT(env->GetArrayLength(jmatrix) == 16);
39
40 if (auto* canvas = reinterpret_cast<SkCanvas*>(native_instance)) {
41 auto* m = env->GetFloatArrayElements(jmatrix, nullptr);
42 canvas->concat(SkM44::RowMajor(m));
43 env->ReleaseFloatArrayElements(jmatrix, m, 0);
44 }
45 }
46
Canvas_DrawColor(JNIEnv * env,jobject,jlong native_instance,float r,float g,float b,float a)47 void Canvas_DrawColor(JNIEnv* env, jobject, jlong native_instance,
48 float r, float g, float b, float a) {
49 if (auto* canvas = reinterpret_cast<SkCanvas*>(native_instance)) {
50 canvas->drawColor(SkColor4f{r, g, b, a});
51 }
52 }
53
Canvas_DrawRect(JNIEnv * env,jobject,jlong native_instance,jfloat left,jfloat top,jfloat right,jfloat bottom,jlong native_paint)54 void Canvas_DrawRect(JNIEnv* env, jobject, jlong native_instance,
55 jfloat left, jfloat top, jfloat right, jfloat bottom,
56 jlong native_paint) {
57 auto* canvas = reinterpret_cast<SkCanvas*>(native_instance);
58 auto* paint = reinterpret_cast<SkPaint* >(native_paint);
59 if (canvas && paint) {
60 canvas->drawRect(SkRect::MakeLTRB(left, top, right, bottom), *paint);
61 }
62 }
63
64 } // namespace
65
register_androidkit_Canvas(JNIEnv * env)66 int register_androidkit_Canvas(JNIEnv* env) {
67 static const JNINativeMethod methods[] = {
68 {"nSave" , "(J)V" , reinterpret_cast<void*>(Canvas_Save) },
69 {"nRestore" , "(J)V" , reinterpret_cast<void*>(Canvas_Restore) },
70 {"nConcat" , "(JJ)V" , reinterpret_cast<void*>(Canvas_Concat) },
71 {"nConcat16f", "(J[F)V" , reinterpret_cast<void*>(Canvas_Concat16f)},
72 {"nDrawColor", "(JFFFF)V" , reinterpret_cast<void*>(Canvas_DrawColor)},
73 {"nDrawRect" , "(JFFFFJ)V", reinterpret_cast<void*>(Canvas_DrawRect) },
74 };
75
76 const auto clazz = env->FindClass("org/skia/androidkit/Canvas");
77 return clazz
78 ? env->RegisterNatives(clazz, methods, SK_ARRAY_COUNT(methods))
79 : JNI_ERR;
80 }
81