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 // graphics types into the types the chromium stack expects, and back.
19
20 #define LOG_TAG "webviewchromium_plat_support"
21
22 #include "draw_gl.h"
23 #include "draw_sw.h"
24
25 #include <cstdlib>
26 #include <jni.h>
27 #include <utils/Log.h>
28 #include "graphic_buffer_impl.h"
29 #include "GraphicsJNI.h"
30 #include "SkCanvasStateUtils.h"
31 #include "SkGraphics.h"
32 #include "SkPicture.h"
33
34 #define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
35
36 namespace android {
37 namespace {
38
39 class PixelInfo : public AwPixelInfo {
40 public:
41 explicit PixelInfo(android::Canvas* canvas);
42 ~PixelInfo();
43 };
44
45
PixelInfo(android::Canvas * canvas)46 PixelInfo::PixelInfo(android::Canvas* canvas) {
47 memset(this, 0, sizeof(AwPixelInfo));
48 version = kAwPixelInfoVersion;
49 state = canvas->captureCanvasState();
50 }
51
~PixelInfo()52 PixelInfo::~PixelInfo() {
53 if (state)
54 SkCanvasStateUtils::ReleaseCanvasState(state);
55 }
56
GetPixels(JNIEnv * env,jobject java_canvas)57 AwPixelInfo* GetPixels(JNIEnv* env, jobject java_canvas) {
58 android::Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, java_canvas);
59 if (!nativeCanvas)
60 return NULL;
61
62 PixelInfo* pixels = new PixelInfo(nativeCanvas);
63 if (!pixels->state) {
64 delete pixels;
65 pixels = NULL;
66 }
67 return pixels;
68 }
69
ReleasePixels(AwPixelInfo * pixels)70 void ReleasePixels(AwPixelInfo* pixels) {
71 delete static_cast<PixelInfo*>(pixels);
72 }
73
GetDrawSWFunctionTable(JNIEnv * env,jclass)74 jlong GetDrawSWFunctionTable(JNIEnv* env, jclass) {
75 static AwDrawSWFunctionTable function_table;
76 function_table.version = kAwDrawSWFunctionTableVersion;
77 function_table.access_pixels = &GetPixels;
78 function_table.release_pixels = &ReleasePixels;
79 return reinterpret_cast<intptr_t>(&function_table);
80 }
81
GetDrawGLFunctionTable(JNIEnv * env,jclass)82 jlong GetDrawGLFunctionTable(JNIEnv* env, jclass) {
83 static AwDrawGLFunctionTable function_table;
84 function_table.version = kAwDrawGLFunctionTableVersion;
85 function_table.create_graphic_buffer = &GraphicBufferImpl::Create;
86 function_table.release_graphic_buffer = &GraphicBufferImpl::Release;
87 function_table.map = &GraphicBufferImpl::MapStatic;
88 function_table.unmap = &GraphicBufferImpl::UnmapStatic;
89 function_table.get_native_buffer = &GraphicBufferImpl::GetNativeBufferStatic;
90 function_table.get_stride = &GraphicBufferImpl::GetStrideStatic;
91 return reinterpret_cast<intptr_t>(&function_table);
92 }
93
94 const char kClassName[] = "com/android/webview/chromium/GraphicsUtils";
95 const JNINativeMethod kJniMethods[] = {
96 { "nativeGetDrawSWFunctionTable", "()J",
97 reinterpret_cast<void*>(GetDrawSWFunctionTable) },
98 { "nativeGetDrawGLFunctionTable", "()J",
99 reinterpret_cast<void*>(GetDrawGLFunctionTable) },
100 };
101
102 } // namespace
103
RegisterGraphicsUtils(JNIEnv * env)104 void RegisterGraphicsUtils(JNIEnv* env) {
105 jclass clazz = env->FindClass(kClassName);
106 LOG_ALWAYS_FATAL_IF(!clazz, "Unable to find class '%s'", kClassName);
107
108 int res = env->RegisterNatives(clazz, kJniMethods, NELEM(kJniMethods));
109 LOG_ALWAYS_FATAL_IF(res < 0, "register native methods failed: res=%d", res);
110 }
111
112 } // namespace android
113