1/*
2 * Copyright (C) 2012 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// Provides a webviewchromium glue layer adapter from the internal Android
18// GL Functor data types into the types the chromium stack expects, and back.
19
20#define LOG_TAG "webviewchromium_plat_support"
21
22#include "android_webview/public/browser/draw_gl.h"
23
24#include <errno.h>
25#include <jni.h>
26#include <private/hwui/DrawGlInfo.h>
27#include <string.h>
28#include <sys/resource.h>
29#include <sys/time.h>
30#include <utils/Functor.h>
31#include <utils/Log.h>
32
33#define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
34#define COMPILE_ASSERT(expr, err) static const char err[(expr) ? 1 : -1] = "";
35
36namespace android {
37namespace {
38
39AwDrawGLFunction* g_aw_drawgl_function = NULL;
40
41class DrawGLFunctor : public Functor {
42 public:
43  DrawGLFunctor(jint view_context) : view_context_(view_context) {}
44  virtual ~DrawGLFunctor() {}
45
46  // Functor
47  virtual status_t operator ()(int what, void* data) {
48    using uirenderer::DrawGlInfo;
49    if (!g_aw_drawgl_function) {
50      ALOGE("Cannot draw: no DrawGL Function installed");
51      return DrawGlInfo::kStatusDone;
52    }
53
54    AwDrawGLInfo aw_info;
55    aw_info.mode = (what == DrawGlInfo::kModeProcess) ?
56        AwDrawGLInfo::kModeProcess : AwDrawGLInfo::kModeDraw;
57    DrawGlInfo* gl_info = reinterpret_cast<DrawGlInfo*>(data);
58
59    // Map across the input values.
60    aw_info.clip_left = gl_info->clipLeft;
61    aw_info.clip_top = gl_info->clipTop;
62    aw_info.clip_right = gl_info->clipRight;
63    aw_info.clip_bottom = gl_info->clipBottom;
64    aw_info.width = gl_info->width;
65    aw_info.height = gl_info->height;
66    aw_info.is_layer = gl_info->isLayer;
67    COMPILE_ASSERT(NELEM(aw_info.transform) == NELEM(gl_info->transform),
68                   mismatched_transform_matrix_sizes);
69    for (int i = 0; i < NELEM(aw_info.transform); ++i) {
70      aw_info.transform[i] = gl_info->transform[i];
71    }
72
73    // Also pre-initialize the output fields in case the implementation does
74    // not modify them.
75    aw_info.status_mask = AwDrawGLInfo::kStatusMaskDone;
76    aw_info.dirty_left = gl_info->dirtyLeft;
77    aw_info.dirty_top = gl_info->dirtyTop;
78    aw_info.dirty_right = gl_info->dirtyRight;
79    aw_info.dirty_bottom = gl_info->dirtyBottom;
80
81    // Invoke the DrawGL method.
82    g_aw_drawgl_function(view_context_, &aw_info, NULL);
83
84    // Copy out the outputs.
85    gl_info->dirtyLeft = aw_info.dirty_left;
86    gl_info->dirtyTop = aw_info.dirty_top;
87    gl_info->dirtyRight = aw_info.dirty_right;
88    gl_info->dirtyBottom = aw_info.dirty_bottom;
89
90    // Calculate the return code.
91    status_t res = DrawGlInfo::kStatusDone;
92    if (aw_info.status_mask & AwDrawGLInfo::kStatusMaskDraw)
93      res |= DrawGlInfo::kStatusDraw;
94    if (aw_info.status_mask & AwDrawGLInfo::kStatusMaskInvoke)
95      res |= DrawGlInfo::kStatusInvoke;
96
97    return res;
98  }
99
100 private:
101  int view_context_;
102};
103
104// Raise the file handle soft limit to the hard limit since gralloc buffers
105// uses file handles.
106void RaiseFileNumberLimit() {
107  static bool have_raised_limit = false;
108  if (have_raised_limit)
109    return;
110
111  have_raised_limit = true;
112  struct rlimit limit_struct;
113  limit_struct.rlim_cur = 0;
114  limit_struct.rlim_max = 0;
115  if (getrlimit(RLIMIT_NOFILE, &limit_struct) == 0) {
116    limit_struct.rlim_cur = limit_struct.rlim_max;
117    if (setrlimit(RLIMIT_NOFILE, &limit_struct) != 0) {
118      ALOGE("setrlimit failed: %s", strerror(errno));
119    }
120  } else {
121    ALOGE("getrlimit failed: %s", strerror(errno));
122  }
123}
124
125jint CreateGLFunctor(JNIEnv*, jclass, jint view_context) {
126  RaiseFileNumberLimit();
127  return reinterpret_cast<jint>(new DrawGLFunctor(view_context));
128}
129
130void DestroyGLFunctor(JNIEnv*, jclass, jint functor) {
131  delete reinterpret_cast<DrawGLFunctor*>(functor);
132}
133
134void SetChromiumAwDrawGLFunction(JNIEnv*, jclass, jint draw_function) {
135  g_aw_drawgl_function = reinterpret_cast<AwDrawGLFunction*>(draw_function);
136}
137
138const char kClassName[] = "com/android/webview/chromium/DrawGLFunctor";
139const JNINativeMethod kJniMethods[] = {
140    { "nativeCreateGLFunctor", "(I)I",
141        reinterpret_cast<void*>(CreateGLFunctor) },
142    { "nativeDestroyGLFunctor", "(I)V",
143        reinterpret_cast<void*>(DestroyGLFunctor) },
144    { "nativeSetChromiumAwDrawGLFunction", "(I)V",
145        reinterpret_cast<void*>(SetChromiumAwDrawGLFunction) },
146};
147
148}  // namespace
149
150void RegisterDrawGLFunctor(JNIEnv* env) {
151  jclass clazz = env->FindClass(kClassName);
152  LOG_ALWAYS_FATAL_IF(!clazz, "Unable to find class '%s'", kClassName);
153
154  int res = env->RegisterNatives(clazz, kJniMethods, NELEM(kJniMethods));
155  LOG_ALWAYS_FATAL_IF(res < 0, "register native methods failed: res=%d", res);
156}
157
158}  // namespace android
159