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
17 #include "jni.h"
18 #include <nativehelper/JNIHelp.h>
19 #include <android_runtime/AndroidRuntime.h>
20 #include <android_runtime/android_graphics_SurfaceTexture.h>
21
22 #include <ui/Region.h>
23 #include <ui/Rect.h>
24
25 #include <gui/GLConsumer.h>
26 #include <gui/Surface.h>
27
28 #include <SkBitmap.h>
29 #include <SkCanvas.h>
30 #include <SkImage.h>
31
32 #include "android/graphics/GraphicsJNI.h"
33
34 #include "core_jni_helpers.h"
35
36 namespace android {
37
38 // ----------------------------------------------------------------------------
39 // JNI Glue
40 // ----------------------------------------------------------------------------
41
42 static struct {
43 jmethodID set;
44 jfieldID left;
45 jfieldID top;
46 jfieldID right;
47 jfieldID bottom;
48 } gRectClassInfo;
49
50 static struct {
51 jfieldID nativeWindow;
52 } gTextureViewClassInfo;
53
54 #define GET_INT(object, field) \
55 env->GetIntField(object, field)
56
57 #define GET_LONG(object, field) \
58 env->GetLongField(object, field)
59
60 #define SET_INT(object, field, value) \
61 env->SetIntField(object, field, value)
62
63 #define SET_LONG(object, field, value) \
64 env->SetLongField(object, field, value)
65
66 #define INVOKEV(object, method, ...) \
67 env->CallVoidMethod(object, method, __VA_ARGS__)
68
69 // ----------------------------------------------------------------------------
70 // Native layer
71 // ----------------------------------------------------------------------------
72
73 // FIXME: consider exporting this to share (e.g. android_view_Surface.cpp)
convertPixelFormat(const ANativeWindow_Buffer & buffer)74 static inline SkImageInfo convertPixelFormat(const ANativeWindow_Buffer& buffer) {
75 SkColorType colorType = kUnknown_SkColorType;
76 SkAlphaType alphaType = kOpaque_SkAlphaType;
77 switch (buffer.format) {
78 case WINDOW_FORMAT_RGBA_8888:
79 colorType = kN32_SkColorType;
80 alphaType = kPremul_SkAlphaType;
81 break;
82 case WINDOW_FORMAT_RGBX_8888:
83 colorType = kN32_SkColorType;
84 alphaType = kOpaque_SkAlphaType;
85 break;
86 case AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT:
87 colorType = kRGBA_F16_SkColorType;
88 alphaType = kPremul_SkAlphaType;
89 break;
90 case WINDOW_FORMAT_RGB_565:
91 colorType = kRGB_565_SkColorType;
92 alphaType = kOpaque_SkAlphaType;
93 break;
94 default:
95 break;
96 }
97 return SkImageInfo::Make(buffer.width, buffer.height, colorType, alphaType,
98 GraphicsJNI::defaultColorSpace());
99 }
100
101 /**
102 * This is a private API, and this implementation is also provided in the NDK.
103 * However, the NDK links against android_runtime, which means that using the
104 * NDK implementation would create a circular dependency between the libraries.
105 */
native_window_lock(ANativeWindow * window,ANativeWindow_Buffer * outBuffer,Rect * inOutDirtyBounds)106 static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
107 Rect* inOutDirtyBounds) {
108 return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
109 }
110
native_window_unlockAndPost(ANativeWindow * window)111 static int32_t native_window_unlockAndPost(ANativeWindow* window) {
112 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
113 }
114
android_view_TextureView_createNativeWindow(JNIEnv * env,jobject textureView,jobject surface)115 static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
116 jobject surface) {
117
118 sp<IGraphicBufferProducer> producer(SurfaceTexture_getProducer(env, surface));
119 sp<ANativeWindow> window = new Surface(producer, true);
120
121 window->incStrong((void*)android_view_TextureView_createNativeWindow);
122 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, jlong(window.get()));
123 }
124
android_view_TextureView_destroyNativeWindow(JNIEnv * env,jobject textureView)125 static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
126
127 ANativeWindow* nativeWindow = (ANativeWindow*)
128 GET_LONG(textureView, gTextureViewClassInfo.nativeWindow);
129
130 if (nativeWindow) {
131 sp<ANativeWindow> window(nativeWindow);
132 window->decStrong((void*)android_view_TextureView_createNativeWindow);
133 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, 0);
134 }
135 }
136
android_view_TextureView_lockCanvas(JNIEnv * env,jobject,jlong nativeWindow,jobject canvas,jobject dirtyRect)137 static jboolean android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
138 jlong nativeWindow, jobject canvas, jobject dirtyRect) {
139
140 if (!nativeWindow) {
141 return JNI_FALSE;
142 }
143
144 ANativeWindow_Buffer buffer;
145
146 Rect rect(Rect::EMPTY_RECT);
147 if (dirtyRect) {
148 rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
149 rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
150 rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
151 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
152 } else {
153 rect.set(Rect(0x3FFF, 0x3FFF));
154 }
155
156 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
157 int32_t status = native_window_lock(window.get(), &buffer, &rect);
158 if (status) return JNI_FALSE;
159
160 ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format);
161
162 SkBitmap bitmap;
163 bitmap.setInfo(convertPixelFormat(buffer), bytesCount);
164
165 if (buffer.width > 0 && buffer.height > 0) {
166 bitmap.setPixels(buffer.bits);
167 } else {
168 bitmap.setPixels(NULL);
169 }
170
171 Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
172 nativeCanvas->setBitmap(bitmap);
173 nativeCanvas->clipRect(rect.left, rect.top, rect.right, rect.bottom,
174 SkClipOp::kIntersect);
175
176 if (dirtyRect) {
177 INVOKEV(dirtyRect, gRectClassInfo.set,
178 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
179 }
180
181 return JNI_TRUE;
182 }
183
android_view_TextureView_unlockCanvasAndPost(JNIEnv * env,jobject,jlong nativeWindow,jobject canvas)184 static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
185 jlong nativeWindow, jobject canvas) {
186
187 Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
188 nativeCanvas->setBitmap(SkBitmap());
189
190 if (nativeWindow) {
191 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
192 native_window_unlockAndPost(window.get());
193 }
194 }
195
196 // ----------------------------------------------------------------------------
197 // JNI Glue
198 // ----------------------------------------------------------------------------
199
200 const char* const kClassPathName = "android/view/TextureView";
201
202 static const JNINativeMethod gMethods[] = {
203 { "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
204 (void*) android_view_TextureView_createNativeWindow },
205 { "nDestroyNativeWindow", "()V",
206 (void*) android_view_TextureView_destroyNativeWindow },
207
208 { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z",
209 (void*) android_view_TextureView_lockCanvas },
210 { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)V",
211 (void*) android_view_TextureView_unlockCanvasAndPost },
212 };
213
register_android_view_TextureView(JNIEnv * env)214 int register_android_view_TextureView(JNIEnv* env) {
215 jclass clazz = FindClassOrDie(env, "android/graphics/Rect");
216 gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V");
217 gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I");
218 gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I");
219 gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I");
220 gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I");
221
222 clazz = FindClassOrDie(env, "android/view/TextureView");
223 gTextureViewClassInfo.nativeWindow = GetFieldIDOrDie(env, clazz, "mNativeWindow", "J");
224
225 return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
226 }
227
228 };
229