Camera.cpp revision ed6b9dff563c5e22f040ff37e12c0d771e0478ae 
1#include "jni.h"
2#include "core_jni_helpers.h"
3
4#include "SkCamera.h"
5
6#include "Canvas.h"
7#include "GraphicsJNI.h"
8
9static jfieldID gNativeInstanceFieldID;
10
11static void Camera_constructor(JNIEnv* env, jobject obj) {
12    Sk3DView* view = new Sk3DView;
13    env->SetLongField(obj, gNativeInstanceFieldID, reinterpret_cast<jlong>(view));
14}
15
16static void Camera_destructor(JNIEnv* env, jobject obj) {
17    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
18    Sk3DView* view = reinterpret_cast<Sk3DView*>(viewHandle);
19    delete view;
20}
21
22static void Camera_save(JNIEnv* env, jobject obj) {
23    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
24    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
25    v->save();
26}
27
28static void Camera_restore(JNIEnv* env, jobject obj) {
29    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
30    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
31    v->restore();
32}
33
34static void Camera_translate(JNIEnv* env, jobject obj,
35                             jfloat dx, jfloat dy, jfloat dz) {
36    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
37    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
38    v->translate(dx, dy, dz);
39}
40
41static void Camera_rotateX(JNIEnv* env, jobject obj, jfloat degrees) {
42    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
43    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
44    v->rotateX(degrees);
45}
46
47static void Camera_rotateY(JNIEnv* env, jobject obj, jfloat degrees) {
48    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
49    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
50    v->rotateY(degrees);
51}
52
53static void Camera_rotateZ(JNIEnv* env, jobject obj, jfloat degrees) {
54    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
55    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
56    v->rotateZ(degrees);
57}
58
59static void Camera_rotate(JNIEnv* env, jobject obj, jfloat x, jfloat y, jfloat z) {
60    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
61    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
62    v->rotateX(x);
63    v->rotateY(y);
64    v->rotateZ(z);
65}
66
67static void Camera_setLocation(JNIEnv* env, jobject obj, jfloat x, jfloat y, jfloat z) {
68    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
69    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
70    v->setCameraLocation(x, y, z);
71}
72
73static jfloat Camera_getLocationX(JNIEnv* env, jobject obj) {
74    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
75    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
76    return SkScalarToFloat(v->getCameraLocationX());
77}
78
79static jfloat Camera_getLocationY(JNIEnv* env, jobject obj) {
80    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
81    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
82    return SkScalarToFloat(v->getCameraLocationY());
83}
84
85static jfloat Camera_getLocationZ(JNIEnv* env, jobject obj) {
86    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
87    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
88    return SkScalarToFloat(v->getCameraLocationZ());
89}
90
91static void Camera_getMatrix(JNIEnv* env, jobject obj, jlong matrixHandle) {
92    SkMatrix* native_matrix =  reinterpret_cast<SkMatrix*>(matrixHandle);
93    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
94    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
95    v->getMatrix(native_matrix);
96}
97
98static void Camera_applyToCanvas(JNIEnv* env, jobject obj, jlong canvasHandle) {
99    SkCanvas* canvas = reinterpret_cast<android::Canvas*>(canvasHandle)->getSkCanvas();
100    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
101    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
102    v->applyToCanvas(canvas);
103}
104
105static jfloat Camera_dotWithNormal(JNIEnv* env, jobject obj,
106                                  jfloat x, jfloat y, jfloat z) {
107    jlong viewHandle = env->GetLongField(obj, gNativeInstanceFieldID);
108    Sk3DView* v = reinterpret_cast<Sk3DView*>(viewHandle);
109    SkScalar dot = v->dotWithNormal(x, y, z);
110    return SkScalarToFloat(dot);
111}
112
113// ----------------------------------------------------------------------------
114
115/*
116 * JNI registration.
117 */
118static JNINativeMethod gCameraMethods[] = {
119    /* name, signature, funcPtr */
120
121    { "nativeConstructor",   "()V",    (void*)Camera_constructor   },
122    { "nativeDestructor",    "()V",    (void*)Camera_destructor    },
123    { "save",                "()V",    (void*)Camera_save          },
124    { "restore",             "()V",    (void*)Camera_restore       },
125    { "translate",           "(FFF)V", (void*)Camera_translate     },
126    { "rotateX",             "(F)V",   (void*)Camera_rotateX       },
127    { "rotateY",             "(F)V",   (void*)Camera_rotateY       },
128    { "rotateZ",             "(F)V",   (void*)Camera_rotateZ       },
129    { "rotate",              "(FFF)V", (void*)Camera_rotate        },
130    { "setLocation",         "(FFF)V", (void*)Camera_setLocation   },
131    { "getLocationX",        "()F",    (void*)Camera_getLocationX  },
132    { "getLocationY",        "()F",    (void*)Camera_getLocationY  },
133    { "getLocationZ",        "()F",    (void*)Camera_getLocationZ  },
134    { "nativeGetMatrix",     "(J)V",   (void*)Camera_getMatrix     },
135    { "nativeApplyToCanvas", "(J)V",   (void*)Camera_applyToCanvas },
136    { "dotWithNormal",       "(FFF)F", (void*)Camera_dotWithNormal }
137};
138
139int register_android_graphics_Camera(JNIEnv* env) {
140    jclass clazz = android::FindClassOrDie(env, "android/graphics/Camera");
141    gNativeInstanceFieldID = android::GetFieldIDOrDie(env, clazz, "native_instance", "J");
142    return android::RegisterMethodsOrDie(env, "android/graphics/Camera", gCameraMethods,
143                                         NELEM(gCameraMethods));
144}
145