1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #undef ANDROID_UTILS_REF_BASE_DISABLE_IMPLICIT_CONSTRUCTION // TODO:remove this and fix code
17
18 #include "jni.h"
19 #include <nativehelper/JNIHelp.h>
20 #include <android_runtime/AndroidRuntime.h>
21 #include <android_runtime/android_graphics_SurfaceTexture.h>
22
23 #include <ui/Region.h>
24 #include <ui/Rect.h>
25
26 #include <gui/GLConsumer.h>
27 #include <gui/Surface.h>
28
29 #include <android/graphics/canvas.h>
30
31 #include "core_jni_helpers.h"
32
33 namespace android {
34
35 // ----------------------------------------------------------------------------
36 // JNI Glue
37 // ----------------------------------------------------------------------------
38
39 static struct {
40 jmethodID set;
41 jfieldID left;
42 jfieldID top;
43 jfieldID right;
44 jfieldID bottom;
45 } gRectClassInfo;
46
47 static struct {
48 jfieldID nativeWindow;
49 } gTextureViewClassInfo;
50
51 #define GET_INT(object, field) \
52 env->GetIntField(object, field)
53
54 #define GET_LONG(object, field) \
55 env->GetLongField(object, field)
56
57 #define SET_INT(object, field, value) \
58 env->SetIntField(object, field, value)
59
60 #define SET_LONG(object, field, value) \
61 env->SetLongField(object, field, value)
62
63 #define INVOKEV(object, method, ...) \
64 env->CallVoidMethod(object, method, __VA_ARGS__)
65
66 // ----------------------------------------------------------------------------
67 // Native layer
68 // ----------------------------------------------------------------------------
69
70 /**
71 * This is a private API, and this implementation is also provided in the NDK.
72 * However, the NDK links against android_runtime, which means that using the
73 * NDK implementation would create a circular dependency between the libraries.
74 */
native_window_lock(ANativeWindow * window,ANativeWindow_Buffer * outBuffer,Rect * inOutDirtyBounds)75 static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
76 Rect* inOutDirtyBounds) {
77 return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
78 }
79
native_window_unlockAndPost(ANativeWindow * window)80 static int32_t native_window_unlockAndPost(ANativeWindow* window) {
81 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
82 }
83
android_view_TextureView_createNativeWindow(JNIEnv * env,jobject textureView,jobject surface)84 static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
85 jobject surface) {
86
87 sp<IGraphicBufferProducer> producer(SurfaceTexture_getProducer(env, surface));
88 sp<ANativeWindow> window = sp<Surface>::make(producer, true);
89
90 window->incStrong((void*)android_view_TextureView_createNativeWindow);
91 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, jlong(window.get()));
92 }
93
android_view_TextureView_destroyNativeWindow(JNIEnv * env,jobject textureView)94 static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
95
96 ANativeWindow* nativeWindow = (ANativeWindow*)
97 GET_LONG(textureView, gTextureViewClassInfo.nativeWindow);
98
99 if (nativeWindow) {
100 sp<ANativeWindow> window(nativeWindow);
101 window->decStrong((void*)android_view_TextureView_createNativeWindow);
102 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, 0);
103 }
104 }
105
android_view_TextureView_lockCanvas(JNIEnv * env,jobject,jlong nativeWindow,jobject canvasObj,jobject dirtyRect)106 static jboolean android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
107 jlong nativeWindow, jobject canvasObj, jobject dirtyRect) {
108
109 if (!nativeWindow) {
110 return JNI_FALSE;
111 }
112
113 Rect rect(Rect::EMPTY_RECT);
114 if (dirtyRect) {
115 rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
116 rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
117 rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
118 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
119 } else {
120 rect.set(Rect(0x3FFF, 0x3FFF));
121 }
122
123 ANativeWindow_Buffer outBuffer;
124 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
125 int32_t status = native_window_lock(window.get(), &outBuffer, &rect);
126 if (status) return JNI_FALSE;
127
128 graphics::Canvas canvas(env, canvasObj);
129 canvas.setBuffer(&outBuffer, ANativeWindow_getBuffersDataSpace(window.get()));
130 canvas.clipRect({rect.left, rect.top, rect.right, rect.bottom});
131
132 if (dirtyRect) {
133 INVOKEV(dirtyRect, gRectClassInfo.set,
134 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
135 }
136
137 return JNI_TRUE;
138 }
139
android_view_TextureView_unlockCanvasAndPost(JNIEnv * env,jobject,jlong nativeWindow,jobject canvasObj)140 static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
141 jlong nativeWindow, jobject canvasObj) {
142
143 // release the buffer from the canvas
144 graphics::Canvas canvas(env, canvasObj);
145 canvas.setBuffer(nullptr, ADATASPACE_UNKNOWN);
146
147 if (nativeWindow) {
148 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
149 native_window_unlockAndPost(window.get());
150 }
151 }
152
153 // ----------------------------------------------------------------------------
154 // JNI Glue
155 // ----------------------------------------------------------------------------
156
157 const char* const kClassPathName = "android/view/TextureView";
158
159 static const JNINativeMethod gMethods[] = {
nCreateNativeWindow(Landroid/graphics/SurfaceTexture;)160 { "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
161 (void*) android_view_TextureView_createNativeWindow },
nDestroyNativeWindow()162 { "nDestroyNativeWindow", "()V",
163 (void*) android_view_TextureView_destroyNativeWindow },
164
nLockCanvas(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)165 { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z",
166 (void*) android_view_TextureView_lockCanvas },
nUnlockCanvasAndPost(JLandroid/graphics/Canvas;)167 { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)V",
168 (void*) android_view_TextureView_unlockCanvasAndPost },
169 };
170
register_android_view_TextureView(JNIEnv * env)171 int register_android_view_TextureView(JNIEnv* env) {
172 jclass clazz = FindClassOrDie(env, "android/graphics/Rect");
173 gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V");
174 gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I");
175 gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I");
176 gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I");
177 gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I");
178
179 clazz = FindClassOrDie(env, "android/view/TextureView");
180 gTextureViewClassInfo.nativeWindow = GetFieldIDOrDie(env, clazz, "mNativeWindow", "J");
181
182 return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
183 }
184
185 };
186