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
36namespace android {
37
38// ----------------------------------------------------------------------------
39// JNI Glue
40// ----------------------------------------------------------------------------
41
42static struct {
43    jmethodID set;
44    jfieldID left;
45    jfieldID top;
46    jfieldID right;
47    jfieldID bottom;
48} gRectClassInfo;
49
50static 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)
74static 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 */
106static 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
111static int32_t native_window_unlockAndPost(ANativeWindow* window) {
112    return window->perform(window, NATIVE_WINDOW_UNLOCK_AND_POST);
113}
114
115static 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
125static 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
137static 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
184static 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
200const char* const kClassPathName = "android/view/TextureView";
201
202static 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
214int 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