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 }
99
100 /**
101 * This is a private API, and this implementation is also provided in the NDK.
102 * However, the NDK links against android_runtime, which means that using the
103 * NDK implementation would create a circular dependency between the libraries.
104 */
native_window_lock(ANativeWindow * window,ANativeWindow_Buffer * outBuffer,Rect * inOutDirtyBounds)105 static int32_t native_window_lock(ANativeWindow* window, ANativeWindow_Buffer* outBuffer,
106 Rect* inOutDirtyBounds) {
107 return window->perform(window, NATIVE_WINDOW_LOCK, outBuffer, inOutDirtyBounds);
108 }
109
native_window_unlockAndPost(ANativeWindow * window)110 static int32_t native_window_unlockAndPost(ANativeWindow* window) {
111 return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
112 }
113
android_view_TextureView_createNativeWindow(JNIEnv * env,jobject textureView,jobject surface)114 static void android_view_TextureView_createNativeWindow(JNIEnv* env, jobject textureView,
115 jobject surface) {
116
117 sp<IGraphicBufferProducer> producer(SurfaceTexture_getProducer(env, surface));
118 sp<ANativeWindow> window = new Surface(producer, true);
119
120 window->incStrong((void*)android_view_TextureView_createNativeWindow);
121 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, jlong(window.get()));
122 }
123
android_view_TextureView_destroyNativeWindow(JNIEnv * env,jobject textureView)124 static void android_view_TextureView_destroyNativeWindow(JNIEnv* env, jobject textureView) {
125
126 ANativeWindow* nativeWindow = (ANativeWindow*)
127 GET_LONG(textureView, gTextureViewClassInfo.nativeWindow);
128
129 if (nativeWindow) {
130 sp<ANativeWindow> window(nativeWindow);
131 window->decStrong((void*)android_view_TextureView_createNativeWindow);
132 SET_LONG(textureView, gTextureViewClassInfo.nativeWindow, 0);
133 }
134 }
135
android_view_TextureView_lockCanvas(JNIEnv * env,jobject,jlong nativeWindow,jobject canvas,jobject dirtyRect)136 static jboolean android_view_TextureView_lockCanvas(JNIEnv* env, jobject,
137 jlong nativeWindow, jobject canvas, jobject dirtyRect) {
138
139 if (!nativeWindow) {
140 return JNI_FALSE;
141 }
142
143 ANativeWindow_Buffer buffer;
144
145 Rect rect(Rect::EMPTY_RECT);
146 if (dirtyRect) {
147 rect.left = GET_INT(dirtyRect, gRectClassInfo.left);
148 rect.top = GET_INT(dirtyRect, gRectClassInfo.top);
149 rect.right = GET_INT(dirtyRect, gRectClassInfo.right);
150 rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom);
151 } else {
152 rect.set(Rect(0x3FFF, 0x3FFF));
153 }
154
155 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
156 int32_t status = native_window_lock(window.get(), &buffer, &rect);
157 if (status) return JNI_FALSE;
158
159 ssize_t bytesCount = buffer.stride * bytesPerPixel(buffer.format);
160
161 SkBitmap bitmap;
162 bitmap.setInfo(convertPixelFormat(buffer), bytesCount);
163
164 if (buffer.width > 0 && buffer.height > 0) {
165 bitmap.setPixels(buffer.bits);
166 } else {
167 bitmap.setPixels(NULL);
168 }
169
170 Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
171 nativeCanvas->setBitmap(bitmap);
172 nativeCanvas->clipRect(rect.left, rect.top, rect.right, rect.bottom,
173 SkClipOp::kIntersect);
174
175 if (dirtyRect) {
176 INVOKEV(dirtyRect, gRectClassInfo.set,
177 int(rect.left), int(rect.top), int(rect.right), int(rect.bottom));
178 }
179
180 return JNI_TRUE;
181 }
182
android_view_TextureView_unlockCanvasAndPost(JNIEnv * env,jobject,jlong nativeWindow,jobject canvas)183 static void android_view_TextureView_unlockCanvasAndPost(JNIEnv* env, jobject,
184 jlong nativeWindow, jobject canvas) {
185
186 Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas);
187 nativeCanvas->setBitmap(SkBitmap());
188
189 if (nativeWindow) {
190 sp<ANativeWindow> window((ANativeWindow*) nativeWindow);
191 native_window_unlockAndPost(window.get());
192 }
193 }
194
195 // ----------------------------------------------------------------------------
196 // JNI Glue
197 // ----------------------------------------------------------------------------
198
199 const char* const kClassPathName = "android/view/TextureView";
200
201 static const JNINativeMethod gMethods[] = {
202 { "nCreateNativeWindow", "(Landroid/graphics/SurfaceTexture;)V",
203 (void*) android_view_TextureView_createNativeWindow },
204 { "nDestroyNativeWindow", "()V",
205 (void*) android_view_TextureView_destroyNativeWindow },
206
207 { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z",
208 (void*) android_view_TextureView_lockCanvas },
209 { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)V",
210 (void*) android_view_TextureView_unlockCanvasAndPost },
211 };
212
register_android_view_TextureView(JNIEnv * env)213 int register_android_view_TextureView(JNIEnv* env) {
214 jclass clazz = FindClassOrDie(env, "android/graphics/Rect");
215 gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V");
216 gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I");
217 gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I");
218 gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I");
219 gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I");
220
221 clazz = FindClassOrDie(env, "android/view/TextureView");
222 gTextureViewClassInfo.nativeWindow = GetFieldIDOrDie(env, clazz, "mNativeWindow", "J");
223
224 return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
225 }
226
227 };
228