1 /* libs/android_runtime/android/graphics/ColorFilter.cpp
2 **
3 ** Copyright 2006, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 // This file was generated from the C++ include file: SkColorFilter.h
19 // Any changes made to this file will be discarded by the build.
20 // To change this file, either edit the include, or device/tools/gluemaker/main.cpp,
21 // or one of the auxilary file specifications in device/tools/gluemaker.
22
23 #include "jni.h"
24 #include "GraphicsJNI.h"
25 #include <android_runtime/AndroidRuntime.h>
26
27 #include "SkDrawFilter.h"
28 #include "SkPaintFlagsDrawFilter.h"
29 #include "SkPaint.h"
30
31 namespace android {
32
33 // Custom version of SkPaintFlagsDrawFilter that also calls setFilterLevel.
34 class CompatFlagsDrawFilter : public SkPaintFlagsDrawFilter {
35 public:
CompatFlagsDrawFilter(uint32_t clearFlags,uint32_t setFlags,SkPaint::FilterLevel desiredLevel)36 CompatFlagsDrawFilter(uint32_t clearFlags, uint32_t setFlags,
37 SkPaint::FilterLevel desiredLevel)
38 : SkPaintFlagsDrawFilter(clearFlags, setFlags)
39 , fDesiredLevel(desiredLevel) {
40 }
41
filter(SkPaint * paint,Type type)42 virtual bool filter(SkPaint* paint, Type type) {
43 SkPaintFlagsDrawFilter::filter(paint, type);
44 paint->setFilterLevel(fDesiredLevel);
45 return true;
46 }
47
48 private:
49 const SkPaint::FilterLevel fDesiredLevel;
50 };
51
52 // Returns whether flags contains FILTER_BITMAP_FLAG. If flags does, remove it.
hadFiltering(jint & flags)53 static inline bool hadFiltering(jint& flags) {
54 // Equivalent to the Java Paint's FILTER_BITMAP_FLAG.
55 static const uint32_t sFilterBitmapFlag = 0x02;
56
57 const bool result = (flags & sFilterBitmapFlag) != 0;
58 flags &= ~sFilterBitmapFlag;
59 return result;
60 }
61
62 class SkDrawFilterGlue {
63 public:
64
finalizer(JNIEnv * env,jobject clazz,jlong objHandle)65 static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) {
66 SkDrawFilter* obj = reinterpret_cast<SkDrawFilter*>(objHandle);
67 SkSafeUnref(obj);
68 }
69
CreatePaintFlagsDF(JNIEnv * env,jobject clazz,jint clearFlags,jint setFlags)70 static jlong CreatePaintFlagsDF(JNIEnv* env, jobject clazz,
71 jint clearFlags, jint setFlags) {
72 if (clearFlags | setFlags) {
73 // Mask both groups of flags to remove FILTER_BITMAP_FLAG, which no
74 // longer has a Skia equivalent flag (instead it corresponds to
75 // calling setFilterLevel), and keep track of which group(s), if
76 // any, had the flag set.
77 const bool turnFilteringOn = hadFiltering(setFlags);
78 const bool turnFilteringOff = hadFiltering(clearFlags);
79
80 SkDrawFilter* filter;
81 if (turnFilteringOn) {
82 // Turning filtering on overrides turning it off.
83 filter = new CompatFlagsDrawFilter(clearFlags, setFlags,
84 SkPaint::kLow_FilterLevel);
85 } else if (turnFilteringOff) {
86 filter = new CompatFlagsDrawFilter(clearFlags, setFlags,
87 SkPaint::kNone_FilterLevel);
88 } else {
89 filter = new SkPaintFlagsDrawFilter(clearFlags, setFlags);
90 }
91 return reinterpret_cast<jlong>(filter);
92 } else {
93 return NULL;
94 }
95 }
96 };
97
98 static JNINativeMethod drawfilter_methods[] = {
99 {"nativeDestructor", "(J)V", (void*) SkDrawFilterGlue::finalizer}
100 };
101
102 static JNINativeMethod paintflags_methods[] = {
103 {"nativeConstructor","(II)J", (void*) SkDrawFilterGlue::CreatePaintFlagsDF}
104 };
105
106 #define REG(env, name, array) \
107 result = android::AndroidRuntime::registerNativeMethods(env, name, array, SK_ARRAY_COUNT(array)); \
108 if (result < 0) return result
109
110
register_android_graphics_DrawFilter(JNIEnv * env)111 int register_android_graphics_DrawFilter(JNIEnv* env) {
112 int result;
113
114 REG(env, "android/graphics/DrawFilter", drawfilter_methods);
115 REG(env, "android/graphics/PaintFlagsDrawFilter", paintflags_methods);
116
117 return 0;
118 }
119
120 }
121